This commit was manufactured by cvs2svn to create tag 'R3'.

git-svn-id: http://moon:8086/svn/vhdl/tags/R3@40 cc03376c-175c-47c8-b038-4cd826a8556b

lib/CPUs/MIPS/src/core/dcache.vhd

@@ -14,8 +14,14 @@ ENTITY dcache IS
 	);
 	Port
 	(
-		clk			: in  STD_LOGIC;
+		RST_I		: in  STD_LOGIC;
-		rst			: in  STD_LOGIC;
+		CLK_I		: in  STD_LOGIC;
+		ACK_I		: in  STD_LOGIC;
+		SRDY_I		: in  STD_LOGIC;
+		ADDR_O		: out word_t;
+		DAT_I		: in  word_t;
+		STB_O		: out STD_LOGIC;
+		CYC_O		: out STD_LOGIC;
 		en			: in  STD_LOGIC;
 		cpu_en		: in  STD_LOGIC;
 		cpu_r_wn	: in  STD_LOGIC;
@@ -23,14 +29,7 @@ ENTITY dcache IS
 		cpu_addr	: in  word_t;
 		cpu_din		: in  word_t;
 		cpu_dout	: out word_t;
-		cpu_busy	: out STD_LOGIC;
+		cpu_busy	: out STD_LOGIC
-		mem_req		: out STD_LOGIC;
-		mem_gnt		: in  STD_LOGIC;
-		mem_en		: out STD_LOGIC;
-		mem_addr	: out word_t;
-		mem_din		: in  word_t;
-		mem_valid	: in  STD_LOGIC;
-		mem_rdy		: in  STD_LOGIC
 	);
 END dcache;
 
@@ -181,10 +180,10 @@ begin
 
 	
 cpu_index_reg:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if RST_I = '1' then
 				cache_index_reg	<= (others => '0');
 				tag_index_reg	<= (others => '0');
 				cpu_was_write	<= '0';
@@ -200,9 +199,9 @@ cpu_index_reg:
 	end process;	
 
 cpu_was_wr_reg:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
 			cpu_was_en	<= '0';
 			cpu_we2		<= '0';
 			if cpu_en = '1' and en = '1' then
@@ -219,8 +218,8 @@ inst_tag_ram : dpram_1w1r
 		data_width	=> tram_data_width
 	)
 	PORT MAP (
-		clka	=> clk,
+		clka	=> CLK_I,
-		clkb	=> clk,
+		clkb	=> CLK_I,
 		en_a	=> '1',
 		en_b	=> tram_re,
 		we_a	=> tram_we,
@@ -240,8 +239,8 @@ gen_data_ram:
 			data_width	=> word_t'length/4
 		)
 		PORT MAP (
-			clk_a	=> clk,
+			clk_a	=> CLK_I,
-			clk_b	=> clk,
+			clk_b	=> CLK_I,
 			en_a	=> '1',
 			en_b	=> dram_en,
 			we_a	=> ctrl_dram_we(i),
@@ -256,10 +255,10 @@ gen_data_ram:
 	end generate;	
 	
 cache_state_next:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if RST_I = '1' then
 				s	<= init;
 			else
 				s	<= sn;
@@ -277,14 +276,14 @@ cache_state_next:
 	tram_addr_rd		<= cpu_cache_index when was_miss = '0' else cache_index_reg;
 	cache_entry_out		<= to_dcache_entry(tram_dout);
 	cpu_dram_addr		<= (cpu_cache_index & cpu_word_index) when (was_miss = '0' and cpu_we2 = '0') else (cache_index_reg & word_index_reg);
-	mem_addr			<= tag_index_reg & cache_index_reg & to_unsigned(mem_index_count, word_index_width) & "00";
+	ADDR_O				<= tag_index_reg & cache_index_reg & to_unsigned(mem_index_count, word_index_width) & "00";
 	ctrl_dram_addr		<= cache_index_reg & to_unsigned(ram_index_count, word_index_width);
-	ctrl_dram_din		<= mem_din;
+	ctrl_dram_din		<= DAT_I;
-	ctrl_dram_we		<= (3 downto 0 => (data_write and mem_valid)) or ctrl_force_we;
+	ctrl_dram_we		<= (3 downto 0 => (data_write and ACK_I)) or ctrl_force_we;
 	cpu_dram_we			<= cpu_we_reg when (cpu_we2 = '1' and cache_write_miss = '0') else (others => '0');
 	
 cache_state:
-	process(s, cache_read_miss, cache_index_count, ram_index_count, mem_index_count, cache_index_reg, mem_valid, tag_index_reg, cpu_en, cpu_r_wn, mem_gnt, mem_rdy, cpu_was_en, cpu_was_write, cpu_we_reg)
+	process(s, cache_read_miss, cache_index_count, ram_index_count, mem_index_count, cache_index_reg, ACK_I, tag_index_reg, cpu_en, cpu_r_wn, SRDY_I, cpu_was_en, cpu_was_write, cpu_we_reg)
 	begin
 		cpu_reg_en				<= '0';
 		cache_busy 				<= '1';
@@ -293,8 +292,8 @@ cache_state:
 		ram_index_count_rst		<= '0';
 		mem_index_count_en		<= '0';
 		mem_index_count_rst		<= '0';
-		mem_req					<= '0';
+		CYC_O					<= '0';
-		mem_en					<= '0';
+		STB_O					<= '0';
 		dram_en					<= '0';
 		tram_re					<= '0';
 		was_miss				<= '0';
@@ -320,6 +319,7 @@ cache_state:
 					sn						<= mem_request;
 					cpu_reg_en				<= '0';
 					cache_busy 				<= '1';
+					CYC_O					<= '1';
 				end if;	
 			end if;	
 		when flush =>
@@ -339,30 +339,30 @@ cache_state:
 		when mem_request =>
 			ram_index_count_rst		<= '1';
 			mem_index_count_rst		<= '1';
-			mem_req		<= '1';
+			CYC_O		<= '1';
-			if mem_gnt = '1' then
+			if SRDY_I = '1' then
 				sn <= mem_access;
 			end if;	
 		when mem_access =>
-			data_write	<= '1';
+			data_write			<= '1';
-			mem_req		<= '1';
+			mem_index_count_en	<= '1';
-			if mem_rdy = '1' then
+			CYC_O				<= '1';
-				mem_index_count_en	<= '1';
+			STB_O				<= '1';
-				mem_en				<= '1';
+			if mem_index_count = 2**word_index_width-1 then
-				if mem_index_count = 2**word_index_width-1 then
+				if SRDY_I = '1' then
-					sn			<= mem_data;
+					sn <= mem_data;
 				end if;	
 			end if;	
 		when mem_data =>
-			mem_req		<= '1';
+			CYC_O		<= '1';
 			data_write	<= '1';
 			if ram_index_count = 2**word_index_width-1 then
-				if mem_valid = '1' then
+				if ACK_I = '1' then
 					sn			<= upd_cache;
 				end if;	
 			end if;	
 		when upd_cache =>
-			mem_req					<= '1';
+			CYC_O					<= '1';
 			tram_addr_wr			<= cache_index_reg;
 			tram_we					<= '1';
 			cache_entry_in.valid	<= '1';
@@ -388,9 +388,9 @@ cache_state:
 	end process;
 
 cache_index_counter:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
 			if cache_index_count_en = '0' then
 				cache_index_count	<= 2**cache_index_width-1;
 			elsif cache_index_count /= 0 then
@@ -400,12 +400,12 @@ cache_index_counter:
 	end process;	
 		
 ram_index_counter:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
 			if ram_index_count_rst = '1' then
 				ram_index_count	<= 0;
-			elsif data_write = '1' and mem_valid = '1' then
+			elsif data_write = '1' and ACK_I = '1' then
 				if ram_index_count /= 2**word_index_width-1 then
 					ram_index_count 	<= ram_index_count + 1;
 				end if;
@@ -414,12 +414,12 @@ ram_index_counter:
 	end process;	
 
 mem_index_counter:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
 			if mem_index_count_rst = '1' then
 				mem_index_count	<= 0;
-			elsif mem_index_count_en = '1' then
+			elsif mem_index_count_en = '1' and SRDY_I = '1' then
 				if mem_index_count /= 2**word_index_width-1 then
 					mem_index_count 	<= mem_index_count + 1;
 				end if;

lib/CPUs/MIPS/src/core/icache.vhd

@@ -14,20 +14,19 @@ ENTITY icache IS
 	);
 	Port
 	(
-		clk			: in  STD_LOGIC;
+		RST_I		: in  STD_LOGIC;
-		rst			: in  STD_LOGIC;
+		CLK_I		: in  STD_LOGIC;
+		ACK_I		: in  STD_LOGIC;
+		SRDY_I		: in  STD_LOGIC;
+		ADDR_O		: out word_t;
+		DAT_I		: in  word_t;
+		STB_O		: out STD_LOGIC;
+		CYC_O		: out STD_LOGIC;
 		en			: in  STD_LOGIC;
 		cpu_en		: in  STD_LOGIC;
 		cpu_addr	: in  word_t;
 		cpu_dout	: out word_t;
-		cpu_busy	: out STD_LOGIC;
+		cpu_busy	: out STD_LOGIC
-		mem_req		: out STD_LOGIC;
-		mem_gnt		: in  STD_LOGIC;
-		mem_en		: out STD_LOGIC;
-		mem_addr	: out word_t;
-		mem_din		: in  word_t;
-		mem_valid	: in  STD_LOGIC;
-		mem_rdy		: in  STD_LOGIC
 	);
 END icache;
 
@@ -143,10 +142,10 @@ begin
 
 	
 cpu_index_reg:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if RST_I = '1' then
 				cache_index_reg	<= (others => '0');
 				tag_index_reg	<= (others => '0');
 			elsif cpu_reg_en = '1' then
@@ -163,8 +162,8 @@ inst_tag_ram : dpram_1w1r
 		data_width	=> tag_ram_data_width
 	)
 	PORT MAP (
-		clka	=> clk,
+		clka	=> CLK_I,
-		clkb	=> clk,
+		clkb	=> CLK_I,
 		en_a	=> '1',
 		en_b	=> tag_ram_re,
 		we_a	=> tag_ram_we,
@@ -180,8 +179,8 @@ inst_data_ram : dpram_1w1r
 		data_width	=> word_t'length
 	)
 	PORT MAP (
-		clka	=> clk,
+		clka	=> CLK_I,
-		clkb	=> clk,
+		clkb	=> CLK_I,
 		en_a	=> '1',
 		en_b	=> data_ram_re,
 		we_a	=> data_ram_we,
@@ -193,10 +192,10 @@ inst_data_ram : dpram_1w1r
 	
 	
 cache_state_next:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if RST_I = '1' then
 				s	<= init;
 			else
 				s	<= sn;
@@ -213,13 +212,13 @@ cache_state_next:
 	tag_ram_addr_rd		<= cpu_cache_index when was_miss = '0' else cache_index_reg;
 	cache_entry_out		<= to_icache_entry(tag_ram_data_rd);
 	data_ram_addr_rd	<= (cpu_cache_index & cpu_word_index) when was_miss = '0' else (cache_index_reg & word_index_reg);
-	mem_addr			<= tag_index_reg & cache_index_reg & to_unsigned(mem_index_count, word_index_width) & "00";
+	ADDR_O				<= tag_index_reg & cache_index_reg & to_unsigned(mem_index_count, word_index_width) & "00";
 	data_ram_addr_wr	<= cache_index_reg & to_unsigned(ram_index_count, word_index_width);
-	data_ram_data_wr	<= mem_din;
+	data_ram_data_wr	<= DAT_I;
-	data_ram_we			<= data_write and mem_valid;
+	data_ram_we			<= data_write and ACK_I;
 
 cache_state:
-	process(s, cache_miss, cache_index_count, ram_index_count, mem_index_count, cache_index_reg, mem_valid, tag_index_reg, cpu_en, mem_gnt, mem_rdy, en)
+	process(s, cache_miss, cache_index_count, ram_index_count, mem_index_count, cache_index_reg, ACK_I, tag_index_reg, cpu_en, SRDY_I, en)
 	begin
 		cpu_reg_en				<= '0';
 		cache_busy 				<= '1';
@@ -228,8 +227,8 @@ cache_state:
 		ram_index_count_rst		<= '0';
 		mem_index_count_en		<= '0';
 		mem_index_count_rst		<= '0';
-		mem_req					<= '0';
+		CYC_O					<= '0';
-		mem_en					<= '0';
+		STB_O					<= '0';
 		data_ram_re				<= '0';
 		tag_ram_re				<= '0';
 		was_miss				<= '0';
@@ -250,6 +249,7 @@ cache_state:
 					sn						<= mem_request;
 					cpu_reg_en				<= '0';
 					cache_busy 				<= '1';
+					CYC_O					<= '1';
 				elsif cpu_en = '1' then
 					cpu_reg_en			<= '1';
 					data_ram_re			<= '1';
@@ -273,37 +273,37 @@ cache_state:
 		when mem_request =>
 			ram_index_count_rst		<= '1';
 			mem_index_count_rst		<= '1';
-			mem_req		<= '1';
+			CYC_O		<= '1';
-			if mem_gnt = '1' then
+			if SRDY_I = '1' then
 				sn <= mem_access;
 			end if;	
 		when mem_access =>
+			mem_index_count_en	<= '1';
 			data_write	<= '1';
-			mem_req		<= '1';
+			CYC_O		<= '1';
-			if mem_rdy = '1' then
+			STB_O		<= '1';
-				mem_index_count_en	<= '1';
+			if mem_index_count = 2**word_index_width-1 then
-				mem_en				<= '1';
+				if SRDY_I = '1' then
-				if mem_index_count = 2**word_index_width-1 then
 					sn			<= mem_data;
 				end if;	
 			end if;	
 		when mem_data =>
-			mem_req		<= '1';
+			CYC_O		<= '1';
 			data_write	<= '1';
 			if ram_index_count = 2**word_index_width-1 then
-				if mem_valid = '1' then
+				if ACK_I = '1' then
 					sn			<= upd_cache;
 				end if;	
 			end if;	
 		when upd_cache =>
-			mem_req					<= '1';
+			CYC_O					<= '1';
 			tag_ram_addr_wr			<= cache_index_reg;
 			tag_ram_we				<= '1';
 			cache_entry_in.valid	<= '1';
 			sn						<= rd_cache;
 			
 		when rd_cache =>
---			mem_req					<= '1';
+--			CYC_O					<= '1';
 			tag_ram_re				<= '1';
 			data_ram_re				<= '1';
 			was_miss				<= '1';
@@ -314,9 +314,9 @@ cache_state:
 	end process;
 
 cache_index_counter:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
 			if cache_index_count_en = '0' then
 				cache_index_count	<= 2**cache_index_width-1;
 			elsif cache_index_count /= 0 then
@@ -326,12 +326,12 @@ cache_index_counter:
 	end process;	
 		
 ram_index_counter:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
 			if ram_index_count_rst = '1' then
 				ram_index_count	<= 0;
-			elsif data_write = '1' and mem_valid = '1' then
+			elsif data_write = '1' and ACK_I = '1' then
 				if ram_index_count /= 2**word_index_width-1 then
 					ram_index_count 	<= ram_index_count + 1;
 				end if;
@@ -340,12 +340,12 @@ ram_index_counter:
 	end process;	
 
 mem_index_counter:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
 			if mem_index_count_rst = '1' then
 				mem_index_count	<= 0;
-			elsif mem_index_count_en = '1' then
+			elsif mem_index_count_en = '1' and SRDY_I = '1' then
 				if mem_index_count /= 2**word_index_width-1 then
 					mem_index_count 	<= mem_index_count + 1;
 				end if;

lib/CPUs/MIPS/src/core/mips_bui.vhd

@@ -31,36 +31,37 @@ use work.mips_types.all;
 entity bui is
 	Port
 	(
-		rst				: in  STD_LOGIC;
+		RST_I			: in  STD_LOGIC;
-		clk				: in  STD_LOGIC;
+		CLK_I			: in  STD_LOGIC;
-		ce				: in  STD_LOGIC;
+		ACK_I			: in  STD_LOGIC;
-		cpu_wait		: out STD_LOGIC;
+		SRDY_I			: in  STD_LOGIC;
+		ADDR_O			: out word_t;
+		DAT_I			: in  word_t;
+		DAT_O			: out word_t;
+		WE_O			: out STD_LOGIC;
+		SEL_O			: out unsigned(3 downto 0);
+		CYC_O			: out STD_LOGIC;
+		STB_O			: out STD_LOGIC;
+		MRDY_O			: out STD_LOGIC;
+		cpu_imem_err	: out STD_LOGIC;
 		cpu_imem_rdy	: out STD_LOGIC;
 		cpu_imem_en		: in  STD_LOGIC;
 		cpu_imem_addr	: in  word_t;
 		cpu_imem_din	: out word_t;
+		cpu_dmem_err	: out STD_LOGIC;
 		cpu_dmem_rdy	: out STD_LOGIC;
 		cpu_dmem_en		: in  STD_LOGIC;
 		cpu_dmem_re		: in  STD_LOGIC;
 		cpu_dmem_we		: in  unsigned(3 downto 0);
 		cpu_dmem_dout	: in  word_t;
 		cpu_dmem_din	: out word_t;
-		cpu_dmem_addr	: in  word_t;
+		cpu_dmem_addr	: in  word_t
-		mem_valid		: in  STD_LOGIC;
-		mem_rdy			: in  STD_LOGIC;
-		mem_addr		: out word_t;
-		mem_din			: in  word_t;
-		mem_dout		: out word_t;
-		mem_re			: out STD_LOGIC;
-		mem_we			: out unsigned(3 downto 0);
-		mem_ce			: out STD_LOGIC
 	);
-	
 end bui;
 
 architecture behavior of bui is
 
-COMPONENT icache
+	COMPONENT icache
 	GENERIC
 	(
 		cache_size	: natural := 2048;	-- words
@@ -68,24 +69,23 @@ COMPONENT icache
 	);
 	PORT
 	(
-		clk			: in  STD_LOGIC;
+		RST_I		: in  STD_LOGIC;
-		rst			: in  STD_LOGIC;
+		CLK_I		: in  STD_LOGIC;
+		ACK_I		: in  STD_LOGIC;
+		SRDY_I		: in  STD_LOGIC;
+		ADDR_O		: out word_t;
+		DAT_I		: in  word_t;
+		STB_O		: out STD_LOGIC;
+		CYC_O		: out STD_LOGIC;
 		en			: in  STD_LOGIC;
 		cpu_en		: in  STD_LOGIC;
 		cpu_addr	: in  word_t;
 		cpu_dout	: out word_t;
-		cpu_busy	: out STD_LOGIC;
+		cpu_busy	: out STD_LOGIC
-		mem_en		: out STD_LOGIC;
-		mem_req		: out STD_LOGIC;
-		mem_gnt		: in  STD_LOGIC;
-		mem_addr	: out word_t;
-		mem_din		: in  word_t;
-		mem_valid	: in  STD_LOGIC;
-		mem_rdy		: in  STD_LOGIC
 	);
-END COMPONENT;
+	END COMPONENT;
 
-COMPONENT dcache
+	COMPONENT dcache
 	GENERIC
 	(
 		cache_size	: natural := 2048;	-- words
@@ -93,8 +93,14 @@ COMPONENT dcache
 	);
 	PORT
 	(
-		clk			: in  STD_LOGIC;
+		RST_I		: in  STD_LOGIC;
-		rst			: in  STD_LOGIC;
+		CLK_I		: in  STD_LOGIC;
+		ACK_I		: in  STD_LOGIC;
+		SRDY_I		: in  STD_LOGIC;
+		ADDR_O		: out word_t;
+		DAT_I		: in  word_t;
+		STB_O		: out STD_LOGIC;
+		CYC_O		: out STD_LOGIC;
 		en			: in  STD_LOGIC;
 		cpu_en		: in  STD_LOGIC;
 		cpu_r_wn	: in  STD_LOGIC;
@@ -102,55 +108,112 @@ COMPONENT dcache
 		cpu_addr	: in  word_t;
 		cpu_din		: in  word_t;
 		cpu_dout	: out word_t;
-		cpu_busy	: out STD_LOGIC;
+		cpu_busy	: out STD_LOGIC
-		mem_req		: out STD_LOGIC;
-		mem_gnt		: in  STD_LOGIC;
-		mem_en		: out STD_LOGIC;
-		mem_addr	: out word_t;
-		mem_din		: in  word_t;
-		mem_valid	: in  STD_LOGIC;
-		mem_rdy		: in  STD_LOGIC
 	);
-END COMPONENT;
+	END COMPONENT;
 
-	type bus_state_t is (init, ready, i_cache_bus_access, d_cache_bus_access, d_bus_start, d_bus_access, d_bus_finish);
+	type bus_state_t is (init, ready, i_cache_bus_access, d_cache_bus_access, uncached_bus_access);
 	
-	signal s, sn : bus_state_t;
+	signal s, sn 			: bus_state_t;
-	signal dmem_re			: std_logic;
 	signal dmem_we			: unsigned(3 downto 0);
 	signal dcache_dout		: word_t;
-	signal dmem_dout		: word_t;
+	signal dcache_mem_gnt	: std_logic;
-	signal dmem_din			: word_t;
+	signal icache_mem_gnt 	: std_logic;
-	signal dmem_addr		: word_t;
+	signal dmem_mem_gnt		: std_logic;
-	signal imem_addr		: word_t;
-	signal imem_mem_out_en	: std_logic;
-	signal dmem_mem_out_en 	: std_logic;
-	signal dmem_ack			: std_logic;
-	signal dcache_busy1		: std_logic;
 	signal dcache_busy2		: std_logic;
 	signal icache_busy 		: std_logic;
-	signal bus_req	 		: std_logic;
+	signal CYC_O_icache		: std_logic;
-	signal icache_mem_en	: std_logic;
+	signal CYC_O_dcache		: std_logic;
-	signal icache_mem_req	: std_logic;
+	signal CYC_O_dmem		: std_logic;
-	signal icache_mem_gnt	: std_logic;
+	signal SRDY_I_icache	: std_logic;
-	signal icache_mem_addr	: word_t;
+	signal SRDY_I_dcache	: std_logic;
-	signal dcache_mem_en	: std_logic;
+	signal ADDR_O_icache	: word_t;
-	signal dcache_mem_req	: std_logic;
+	signal ADDR_O_dcache	: word_t;
-	signal dcache_mem_gnt	: std_logic;
+	signal ADDR_O_dmem		: word_t;
-	signal dcache_mem_addr	: word_t;
+	signal STB_O_icache		: std_logic;
+	signal STB_O_dcache		: std_logic;
+	signal STB_O_dmem		: std_logic;
+	signal DAT_I_dmem		: word_t;
+	signal DAT_O_dmem		: word_t;
+	signal SEL_O_dmem		: unsigned(3 downto 0);
+	signal WE_O_dmem		: std_logic;
 	signal dcached			: std_logic;
-	signal duncached_access	: std_logic;
 	signal dcache_en		: std_logic;
+	signal uncached_access	: std_logic;
+	
+	type timeout_cnt_t is range 0 to 1E5-1;	
+	signal bus_timeout_cnt	: timeout_cnt_t;
+	signal bus_timeout		: std_logic;
 	
 begin
 
-	mem_ce 			<= mem_rdy and bus_req;
+bus_strobe:
+	process(CLK_I)
+	begin
+		if rising_edge(CLK_I) then
+			if RST_I = '1' then
+				STB_O	<= '0';
+			elsif dmem_mem_gnt = '1' then
+				STB_O	<= STB_O_dmem;
+			elsif SRDY_I_dcache = '1' then
+				STB_O	<= STB_O_dcache;
+			elsif SRDY_I_icache = '1' then
+				STB_O	<= STB_O_icache;
+			elsif SRDY_I = '1' then
+				STB_O	<= '0';
+			end if;	
+		end if;
+	end process;	
+
+bus_cycle:
+	process(CLK_I)
+	begin
+		if rising_edge(CLK_I) then
+			CYC_O		<= '0';
+			if dmem_mem_gnt = '1' then
+				CYC_O	<= CYC_O_dmem;
+			elsif dcache_mem_gnt = '1' then
+				CYC_O	<= CYC_O_dcache;
+			elsif icache_mem_gnt = '1' then
+				CYC_O	<= CYC_O_icache;
+			end if;	
+		end if;
+	end process;	
+
+bus_out:
+	process(CLK_I)
+	begin
+		if rising_edge(CLK_I) then
+			if RST_I = '1' then
+				ADDR_O		<= (others => '0');
+				DAT_O		<= (others => '0');
+				WE_O		<= '0';
+				SEL_O		<= (others => '0');
+			elsif dmem_mem_gnt = '1' then
+				ADDR_O		<= ADDR_O_dmem;
+				DAT_O		<= DAT_O_dmem;
+				WE_O		<= WE_O_dmem;
+				SEL_O		<= SEL_O_dmem;
+			elsif SRDY_I_dcache = '1' then
+				ADDR_O		<= ADDR_O_dcache;
+				WE_O		<= '0';
+				SEL_O		<= (others => '0');
+			elsif SRDY_I_icache = '1' then
+				ADDR_O		<= ADDR_O_icache;
+				WE_O		<= '0';
+				SEL_O		<= (others => '0');
+			end if;	
+		end if;
+	end process;	
+
+	MRDY_O			<= '1';
+
+	SRDY_I_icache	<= SRDY_I when icache_mem_gnt = '1' else '0';
+	SRDY_I_dcache	<= SRDY_I when dcache_mem_gnt = '1' else '0';
+--	SRDY_I_dmem		<= SRDY_I when dmem_mem_gnt = '1' else '0';
 
 	cpu_imem_rdy	<= not icache_busy after 4.5 ns;
---	cpu_imem_din	<= imem_din;
+	cpu_dmem_rdy	<= not (CYC_O_dmem or dcache_busy2) after 4.5 ns;
---	cpu_wait		<= busy after 5.5 ns;
-	cpu_wait		<= '0';
-	cpu_dmem_rdy	<= not (dcache_busy1 or dcache_busy2) after 4.5 ns;
 	
 inst_icache : icache
 	GENERIC MAP
@@ -160,20 +223,19 @@ inst_icache : icache
 	)	
 	PORT MAP
 	(
-		clk			=> clk,
+		CLK_I		=> CLK_I,
-		rst			=> rst,
+		RST_I		=> RST_I,
+		STB_O		=> STB_O_icache,
+		CYC_O		=> CYC_O_icache,
+		ADDR_O		=> ADDR_O_icache,
+		DAT_I		=> DAT_I,
+		ACK_I		=> ACK_I,
+		SRDY_I		=> SRDY_I_icache,
 		en			=> '1',
 		cpu_en		=> cpu_imem_en,
 		cpu_addr	=> cpu_imem_addr,
 		cpu_dout	=> cpu_imem_din,
-		cpu_busy	=> icache_busy,
+		cpu_busy	=> icache_busy
-		mem_en		=> icache_mem_en,
-		mem_req		=> icache_mem_req,
-		mem_gnt		=> icache_mem_gnt,
-		mem_addr	=> icache_mem_addr,
-		mem_din		=> mem_din,
-		mem_valid	=> mem_valid,
-		mem_rdy		=> mem_rdy
 	);
 
 inst_dcache : dcache
@@ -184,8 +246,14 @@ inst_dcache : dcache
 	)
 	PORT MAP
 	(
-		clk			=> clk,
+		CLK_I		=> CLK_I,
-		rst			=> rst,
+		RST_I		=> RST_I,
+		CYC_O		=> CYC_O_dcache,
+		STB_O		=> STB_O_dcache,
+		ADDR_O		=> ADDR_O_dcache,
+		DAT_I		=> DAT_I,
+		ACK_I		=> ACK_I,
+		SRDY_I		=> SRDY_I_dcache,
 		en			=> dcached,
 		cpu_en		=> dcache_en,
 		cpu_r_wn	=> cpu_dmem_re,
@@ -193,139 +261,118 @@ inst_dcache : dcache
 		cpu_addr	=> cpu_dmem_addr,
 		cpu_din		=> cpu_dmem_dout,
 		cpu_dout	=> dcache_dout,
-		cpu_busy	=> dcache_busy2,
+		cpu_busy	=> dcache_busy2
-		mem_req		=> dcache_mem_req,
-		mem_gnt		=> dcache_mem_gnt,
-		mem_en		=> dcache_mem_en,
-		mem_addr	=> dcache_mem_addr,
-		mem_din		=> mem_din,
-		mem_valid	=> mem_valid,
-		mem_rdy		=> mem_rdy
 	);
 
 	dcached			<= '1' when cpu_dmem_addr(31 downto 28) /= X"A" else '0';
-	cpu_dmem_din	<= dmem_din when duncached_access = '1' else dcache_dout; -- when dmem_valid = '1' else ram_dout after 0.5 ns;
+	cpu_dmem_din	<= dcache_dout when uncached_access = '0' else DAT_I_dmem;
-	dcache_en		<= cpu_dmem_en and not dcache_busy1;
+	dcache_en		<= cpu_dmem_en and not CYC_O_dmem;
 	
 dcache_flags:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			uncached_access	<= '0';
-				dcache_busy1		<= '0';
+			if RST_I = '1' then
+				CYC_O_dmem		<= '0';
 			else	
-				duncached_access <= '0';
+				if ACK_I = '1' and dmem_mem_gnt = '1' then
-				if dmem_ack = '1' then
+					uncached_access	<= not WE_O_dmem;
-					duncached_access <= '1';
+					CYC_O_dmem		<= '0';
-					if dmem_re = '1' then
-						if mem_valid = '1' then
-							dcache_busy1		<= '0';
-						end if;	
-					else
-						dcache_busy1		<= '0';
-					end if;	
 				end if;	
-				if cpu_dmem_en = '1' and dcache_busy1 = '0' and dcache_busy2 = '0' then
+				if cpu_dmem_en = '1' and CYC_O_dmem = '0' and dcache_busy2 = '0' then
-					dcache_busy1		<= '1';
+					CYC_O_dmem	<= '1';
 					if dcached = '1' and cpu_dmem_re = '1' then
-						dcache_busy1	<= '0';
+						CYC_O_dmem	<= '0';
 					end if;	
 				end if;
 			end if;
 		end if;
 	end process;	
 	
-dcache_regs:
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			if cpu_dmem_en = '1' and dcache_busy1 = '0' and dcache_busy2 = '0' then
-				dmem_dout		<= cpu_dmem_dout;
-				dmem_addr		<= cpu_dmem_addr;
-				dmem_re			<= cpu_dmem_re;
-				dmem_we			<= cpu_dmem_we;
-			end if;
-		end if;
-	end process;	
-	
 dcache_data:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if RST_I = '1' then
-				dmem_din		<= (others => '0');
+				DAT_I_dmem		<= (others => '0');
-			elsif dcache_busy1 = '1' and mem_valid = '1' then
+			elsif ACK_I = '1' and CYC_O_dmem = '1' then
-				dmem_din		<= mem_din;
+				DAT_I_dmem		<= DAT_I;
+			end if;
+		end if;
+	end process;	
+	
+dcache_regs:
+	process(CLK_I)
+	begin
+		if rising_edge(CLK_I) then
+			if RST_I = '1' then
+				WE_O_dmem		<= '0';
+				SEL_O_dmem		<= (others => '0');
+			elsif cpu_dmem_en = '1' and CYC_O_dmem = '0' and dcache_busy2 = '0' then
+				DAT_O_dmem		<= cpu_dmem_dout;
+				ADDR_O_dmem		<= cpu_dmem_addr;
+				WE_O_dmem		<= not cpu_dmem_re;
+				SEL_O_dmem		<= cpu_dmem_we;
 			end if;
 		end if;
 	end process;	
 	
 bus_state_next:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if RST_I = '1' then
 				s	<= init;
-			elsif ce = '1' then
+			else
 				s	<= sn;
 			end if;
 		end if;
 	end process;	
 	
 bus_state:
-	process(s, icache_mem_en, icache_mem_req, dcache_busy1, dcache_mem_req, dcache_mem_en, dmem_re, mem_rdy, mem_valid)
+	process(s, CYC_O_icache, CYC_O_dcache, CYC_O_dmem, SRDY_I, ACK_I)
 	begin
 		
-		imem_mem_out_en	<= '0';
+		icache_mem_gnt		<= '0';
-		dmem_mem_out_en	<= '0';
+		dcache_mem_gnt		<= '0';
-		icache_mem_gnt	<= '0';
+		dmem_mem_gnt		<= '0';	
-		dcache_mem_gnt	<= '0';
+		STB_O_dmem			<= '0';
-		dmem_ack		<= '0';
+		sn					<= s;
-		
-		sn				<= s;
 		case s is
 		when init =>
-			if mem_rdy = '1' then
+			sn		<= ready;
-				sn		<= ready;
-			end if;	
 		when ready =>
-			if dcache_busy1 = '1' then
+			if CYC_O_dmem = '1' then
-				if mem_rdy = '1' then
+				dmem_mem_gnt	<= '1';	
-					dmem_mem_out_en	<= '1';
+				if SRDY_I = '1' then
-					if dmem_re = '0' then
+					STB_O_dmem	<= '1';
-						sn			<= d_bus_finish;
+					sn			<= uncached_bus_access;
-					else
-						sn			<= d_bus_access;
-					end if;
 				end if;
-			elsif icache_mem_req = '1' then
+			elsif CYC_O_icache = '1' then
 				sn				<= i_cache_bus_access;
-			elsif dcache_mem_req = '1' then
+--				icache_mem_gnt	<= '1';
+			elsif CYC_O_dcache = '1' then
 				sn				<= d_cache_bus_access;
+--				dcache_mem_gnt	<= '1';
 			end if;
 		when i_cache_bus_access =>
 			icache_mem_gnt	<= '1';
-			if icache_mem_en = '1' then
+			if CYC_O_icache = '0' then
-				imem_mem_out_en	<= '1';
-			elsif icache_mem_req = '0' then
 				sn				<= ready;
+--				icache_mem_gnt	<= '0';
 			end if;	
 		when d_cache_bus_access =>
 			dcache_mem_gnt	<= '1';
-			if dcache_mem_en = '1' then
+			if CYC_O_dcache = '0' then
-				dmem_mem_out_en	<= '1';
-			elsif dcache_mem_req = '0' then
 				sn				<= ready;
+--				dcache_mem_gnt	<= '0';
 			end if;	
-		when d_bus_access =>
+		when uncached_bus_access =>
-			if mem_valid = '1' then
+			dmem_mem_gnt	<= '1';	
-				dmem_ack	<= '1';
+			if ACK_I = '1' then
-				sn			<= ready;
+				sn				<= ready;
-			end if;
+--				dmem_mem_gnt	<= '0';	
-		when d_bus_finish =>
-			if mem_rdy = '1' then
-				dmem_ack	<= '1';
-				sn			<= ready;
 			end if;
 		when others =>
 			sn	<= ready;
@@ -333,44 +380,33 @@ bus_state:
 				
 	end process;	
 
-bus_request:
+bus_timeout_counter:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if (icache_mem_gnt or dcache_mem_gnt or dmem_mem_gnt) = '1' then
-				bus_req 	<= '0';
+				if bus_timeout_cnt /= 0 then
-			elsif dmem_mem_out_en = '1' or imem_mem_out_en = '1' then
+					bus_timeout_cnt	<= bus_timeout_cnt - 1;
-				bus_req		<= '1';
+				else
-			elsif mem_rdy = '1' then
+					bus_timeout	<= '1';
-				bus_req 	<= '0';
+				end if;	
+			else
+				bus_timeout_cnt	<= timeout_cnt_t'high;
+				bus_timeout		<= '0';
 			end if;
 		end if;
 	end process;	
 
-bus_out:
+bus_err:
-	process(clk)
+	process(CLK_I)
 	begin
-		if rising_edge(clk) then
+		if rising_edge(CLK_I) then
-			if rst = '1' then
+			if RST_I = '1' then
-				mem_dout	<= (others => '0');
+				cpu_imem_err	<= '0';
-				mem_addr	<= (others => '0');
+				cpu_dmem_err	<= '0';
-				mem_re		<= '0';
+			elsif bus_timeout = '1' then
-				mem_we		<= (others => '0');
+				cpu_imem_err	<= icache_mem_gnt;
-			elsif dmem_mem_out_en = '1' then
+				cpu_dmem_err	<= dcache_mem_gnt or dmem_mem_gnt;
-				if dcache_mem_gnt = '1' then
-					mem_addr	<= dcache_mem_addr;
-					mem_re		<= '1';
-					mem_we		<= (others => '0');
-				else
-					mem_dout	<= dmem_dout;
-					mem_addr	<= dmem_addr;
-					mem_re		<= dmem_re;
-					mem_we		<= dmem_we;
-				end if;
-			elsif imem_mem_out_en = '1' then
-				mem_addr	<= icache_mem_addr;
-				mem_re		<= '1';
-				mem_we		<= (others => '0');
 			end if;
 		end if;
 	end process;	

lib/CPUs/MIPS/src/core/mips_cop.vhd

@@ -82,12 +82,12 @@ architecture Behavioral of cop is
 	signal cop_pipe_ID : cop_pipe_t;
 	signal cop_pipe_EX : cop_pipe_t;
 	
-	function eval_int(ip, im : unsigned) return STD_LOGIC is
+	function eval_int(ip : unsigned) return STD_LOGIC is
 	variable result : STD_LOGIC;
 	begin
 			result := '0';
 			for i in ip'range loop
-				result := result or (ip(i) and im(i));
+				result := result or ip(i);
 			end loop;
 
 			return result;
@@ -128,7 +128,7 @@ begin
 	eflags.Sys		<= events.syscall;
 	eflags.Bp		<= events.break;
 	eflags.RI		<= events.illegal;
-	eflags.Int		<= eval_int(ip, im) and status(0);
+	eflags.Int		<= eval_int(ip) and status(0);
 
 	exception		<= eflags.Ov or eflags.Sys or eflags.Bp or eflags.RI or eflags.IAdEL or eflags.IAdEK or eflags.DAdEL or eflags.DAdES or eflags.Int after 1 ns;
 	
@@ -280,9 +280,9 @@ cop_ip_reg_write:
 			if rst = '1' then
 				ip(1 downto 0) <= (others => '0');
 			elsif ip_reg_we = '1' then
-				ip(1 downto 0) <= cop_pipe_EX.din(9 downto 8);
+				ip(1 downto 0) <= cop_pipe_EX.din(9 downto 8) and im(1 downto 0);
 			end if;	
-			ip(7 downto 2)	<= events.Int;
+			ip(7 downto 2)	<= events.Int and im(7 downto 2);
 		end if;
 	end process;
 

lib/CPUs/MIPS/src/core/mips_pipeline.vhd

@@ -35,10 +35,12 @@ entity pipeline is
 		clk			: in  STD_LOGIC;
 		halt		: in  STD_LOGIC;
 		int			: in  unsigned(5 downto 0);
+		imem_err	: in  STD_LOGIC;
 		imem_rdy	: in  STD_LOGIC;
 		imem_en		: out STD_LOGIC;
 		imem_addr	: out word_t;
 		imem_data	: in  word_t;
+		dmem_err	: in  STD_LOGIC;
 		dmem_rdy	: in  STD_LOGIC;
 		dmem_en		: out STD_LOGIC;
 		dmem_re		: out STD_LOGIC;

lib/CPUs/MIPS/src/core/mips_top.vhd

@@ -31,17 +31,20 @@ use work.mips_types.all;
 entity mips_top is
 	Port
 	(
-		rst			: in  STD_LOGIC;
+		debug		: out unsigned(1 downto 0);
-		clk			: in  STD_LOGIC;
+		RST_I		: in  STD_LOGIC;
-		int			: in  unsigned (5 downto 0);
+		CLK_I		: in  STD_LOGIC;
-		mem_valid	: in  STD_LOGIC;
+		ACK_I		: in  STD_LOGIC;
-		mem_rdy		: in  STD_LOGIC;
+		SRDY_I		: in  STD_LOGIC;
-		mem_en		: out STD_LOGIC;
+		ADDR_O		: out word_t;
-		mem_re		: out STD_LOGIC;
+		DAT_I		: in  word_t;
-		mem_we		: out unsigned(3 downto 0);
+		DAT_O		: out word_t;
-		mem_din		: in  unsigned (WORD_WIDTH-1 downto 0);
+		WE_O		: out STD_LOGIC;
-		mem_dout	: out unsigned (WORD_WIDTH-1 downto 0);
+		SEL_O		: out unsigned(3 downto 0);
-		mem_addr	: out unsigned (WORD_WIDTH-1 downto 0)
+		CYC_O		: out STD_LOGIC;
+		STB_O		: out STD_LOGIC;
+		MRDY_O		: out STD_LOGIC;
+		INT			: in  unsigned (5 downto 0)
 	);
 	
 end mips_top;
@@ -49,15 +52,18 @@ end mips_top;
 architecture rtl of mips_top is
 
 	COMPONENT pipeline is
-	Port (
+	Port 
+	(
 		rst			: in  STD_LOGIC;
 		clk			: in  STD_LOGIC;
 		halt		: in  STD_LOGIC;
 		int			: in  unsigned (5 downto 0);
+		imem_err	: in  STD_LOGIC;
 		imem_rdy	: in  STD_LOGIC;
 		imem_en		: out STD_LOGIC;
 		imem_addr	: out word_t;
 		imem_data	: in  word_t;
+		dmem_err	: in  STD_LOGIC;
 		dmem_rdy	: in  STD_LOGIC;
 		dmem_en		: out STD_LOGIC;
 		dmem_re		: out STD_LOGIC;
@@ -67,11 +73,12 @@ architecture rtl of mips_top is
 		dmem_dout	: out word_t
 	);
 	END COMPONENT;
-	signal halt				: std_logic;
+	signal imem_err			: std_logic;
 	signal imem_rdy			: std_logic;
 	signal imem_en			: std_logic;
 	signal imem_addr		: word_t;
 	signal imem_din			: word_t;
+	signal dmem_err			: std_logic;
 	signal dmem_rdy			: std_logic;
 	signal dmem_en			: std_logic;
 	signal dmem_re			: std_logic;
@@ -80,50 +87,57 @@ architecture rtl of mips_top is
 	signal dmem_din			: word_t;
 	signal dmem_we			: unsigned(3 downto 0);
 
+
 	COMPONENT bui
-	Port
+	PORT
 	(
-		rst				: in  STD_LOGIC;
+		RST_I			: in  STD_LOGIC;
-		clk				: in  STD_LOGIC;
+		CLK_I			: in  STD_LOGIC;
-		ce				: in  STD_LOGIC;
+		ACK_I			: in  STD_LOGIC;
-		cpu_wait		: out STD_LOGIC;
+		SRDY_I			: in  STD_LOGIC;
+		ADDR_O			: out word_t;
+		DAT_I			: in  word_t;
+		DAT_O			: out word_t;
+		WE_O			: out STD_LOGIC;
+		SEL_O			: out unsigned(3 downto 0);
+		CYC_O			: out STD_LOGIC;
+		STB_O			: out STD_LOGIC;
+		MRDY_O			: out STD_LOGIC;
+		cpu_imem_err	: out STD_LOGIC;
 		cpu_imem_rdy	: out STD_LOGIC;
 		cpu_imem_en		: in  STD_LOGIC;
 		cpu_imem_addr	: in  word_t;
 		cpu_imem_din	: out word_t;
+		cpu_dmem_err	: out STD_LOGIC;
 		cpu_dmem_rdy	: out STD_LOGIC;
 		cpu_dmem_en		: in  STD_LOGIC;
 		cpu_dmem_re		: in  STD_LOGIC;
 		cpu_dmem_we		: in  unsigned(3 downto 0);
-		cpu_dmem_addr	: in  word_t;
-		cpu_dmem_din	: out word_t;
 		cpu_dmem_dout	: in  word_t;
-		mem_valid		: in  STD_LOGIC;
+		cpu_dmem_din	: out word_t;
-		mem_rdy			: in  STD_LOGIC;
+		cpu_dmem_addr	: in  word_t
-		mem_addr		: out word_t;
-		mem_din			: in  word_t;
-		mem_dout		: out word_t;
-		mem_re			: out STD_LOGIC;
-		mem_we			: out unsigned(3 downto 0);
-		mem_ce			: out STD_LOGIC
 	);
 	END COMPONENT;
 
 begin
 
 -------------------------------------------------------------------
+	debug(0)		<= imem_err;
+	debug(1)		<= dmem_err;
 	
 inst_pipeline: pipeline
 	PORT MAP
 	(
-		rst			=> rst,
+		rst			=> RST_I,
-		clk			=> clk,
+		clk			=> CLK_I,
-		halt		=> halt,
+		halt		=> '0',
-		int			=> int,
+		int			=> INT,
+		imem_err	=> imem_err,
 		imem_rdy	=> imem_rdy,
 		imem_en		=> imem_en,
 		imem_addr	=> imem_addr,
 		imem_data	=> imem_din,
+		dmem_err	=> dmem_err,
 		dmem_rdy	=> dmem_rdy,
 		dmem_en		=> dmem_en,
 		dmem_re		=> dmem_re,
@@ -136,29 +150,31 @@ inst_pipeline: pipeline
 inst_bui: bui
 	PORT MAP
 	(
-		rst				=> rst,
+		RST_I			=> RST_I,
-		clk				=> clk,
+		CLK_I			=> CLK_I,
-		ce				=> '1',
+		ACK_I			=> ACK_I,
-		cpu_wait		=> halt,
+		SRDY_I			=> SRDY_I,
+		ADDR_O			=> ADDR_O,
+		DAT_I			=> DAT_I,
+		DAT_O			=> DAT_O,
+		WE_O			=> WE_O,
+		SEL_O			=> SEL_O,
+		CYC_O			=> CYC_O,
+		STB_O			=> STB_O,
+		MRDY_O			=> MRDY_O,
+		cpu_imem_err	=> imem_err,
 		cpu_imem_rdy	=> imem_rdy,
 		cpu_imem_en		=> imem_en,
 		cpu_imem_addr	=> imem_addr,
 		cpu_imem_din	=> imem_din,
+		cpu_dmem_err	=> dmem_err,
 		cpu_dmem_rdy	=> dmem_rdy,
 		cpu_dmem_en		=> dmem_en,
 		cpu_dmem_re		=> dmem_re,
 		cpu_dmem_we		=> dmem_we,
 		cpu_dmem_addr	=> dmem_addr,
 		cpu_dmem_din	=> dmem_din,
-		cpu_dmem_dout	=> dmem_dout,
+		cpu_dmem_dout	=> dmem_dout
-		mem_valid		=> mem_valid,
-		mem_rdy			=> mem_rdy,
-		mem_addr		=> mem_addr,
-		mem_din			=> mem_din,
-		mem_dout		=> mem_dout,
-		mem_re			=> mem_re,
-		mem_we			=> mem_we,
-		mem_ce			=> mem_en
 	);
 
 end rtl;

lib/SDRAM/ddr_sdr_v1_5/src/fifo_sync.vhd

@@ -52,21 +52,25 @@ end fifo_sync;
 
 architecture Behavioral of fifo_sync is
 	
-	signal mem_we		: STD_LOGIC;
+	signal mem_wr_en	: STD_LOGIC;
+	signal mem_rd_en	: STD_LOGIC;
 	signal ptr_w		: unsigned (addr_width-1 downto 0);
 	signal ptr_r		: unsigned (addr_width-1 downto 0);
 	signal full			: STD_LOGIC;
 	signal empty		: STD_LOGIC;
 	signal almost_full	: STD_LOGIC;
 	signal almost_empty	: STD_LOGIC;
+	signal pre_full		: STD_LOGIC;
+	signal pre_empty	: STD_LOGIC;
 	
 begin
 
-	mem_we <= we;
+	mem_wr_en	<= not full;
-	fifo_full <= full;
+	mem_rd_en	<= not pre_empty;
-	fifo_empty <= empty;
+	fifo_full	<= full;
-	fifo_afull <= almost_full;
+	fifo_empty	<= empty;
-	fifo_aempty <= almost_empty;
+	fifo_afull	<= almost_full;
+	fifo_aempty	<= almost_empty;
 
 	inst_sync_fifo_ctrl: entity work.sync_fifo_ctrl
 	GENERIC MAP
@@ -77,16 +81,18 @@ begin
 	)
 	PORT MAP
 	(
-		rst			=>	rst,
+		rst				=>	rst,
-		clk			=>	clk,
+		clk				=>	clk,
-		we			=>	we,
+		we				=>	we,
-		re			=>	re,
+		re				=>	re,
-		ptr_w		=>	ptr_w,
+		ptr_w			=>	ptr_w,
-		ptr_r		=>	ptr_r,
+		ptr_r			=>	ptr_r,
-		fifo_full	=>	full,
+		fifo_full		=>	full,
-		fifo_empty	=>	empty,
+		fifo_empty		=>	empty,
-		fifo_afull	=>	almost_full,
+		fifo_pre_full	=>	pre_full,
-		fifo_aempty	=>	almost_empty
+		fifo_pre_empty	=>	pre_empty,
+		fifo_afull		=>	almost_full,
+		fifo_aempty		=>	almost_empty
 
 	);
 
@@ -98,9 +104,9 @@ begin
 	PORT MAP(
 		clka		=> clk,
 		clkb		=> clk,
-		en_a		=> '1',
+		en_a		=> mem_wr_en,
-		en_b		=> '1',
+		en_b		=> mem_rd_en,
-		we_a		=> mem_we,
+		we_a		=> we,
 		addr_a		=> ptr_w,
 		addr_b		=> ptr_r,
 		din_a		=> data_w,

lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend_wb.vhd

@@ -253,6 +253,8 @@ begin
    
 ------------------------------------------------------------------------------------------
 	SRDY_O				<= rdy;
+	ACK_O				<= not (read_fifo_empty);
+	DAT_O				<= read_fifo_data_out;
 	rdy					<= not (cat_fifo_full or write_fifo_full or read_fifo_full) and CYC_I;
 	write_fifo_we 		<= STB_I and WE_I and rdy;
 	write_fifo_data_in	<= DAT_I;
@@ -278,16 +280,4 @@ begin
 	read_fifo_data_in	<= u_data_r(31 downto 0);	
 	read_fifo_dm_in		<= u_dm_rd_out(3 downto 0);
 
-data_register:
-	process(CLK_I)
-	begin
-		if rising_edge(CLK_I) then
-			ACK_O		<= '0';
-			if MRDY_I = '1' then
-				ACK_O		<= write_fifo_we or (CYC_I and not (WE_I or read_fifo_empty));
-				DAT_O		<= read_fifo_data_out;
-			end if;
-		end if;
-	end process;
-	
 end architecture struct;

projects/mips_sys/ise91/mips_sys/mips_sys.prj

@@ -1,35 +0,0 @@
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_types.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_instr.vhd"
-vhdl work "../../src/sdram_config.vhd"
-vhdl work "../../../../lib/misc/utils_pkg.vhd"
-vhdl work "../../../../lib/FIFO/src/fifo_ctrl_pkg.vhd"
-vhdl work "../../../../lib/misc/dpram_1w2r.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_types.vhd"
-vhdl work "../../../../lib/FIFO/src/sync_fifo_ctrl.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_shifter.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_reg.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_muldiv.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_idecode_rom.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_cop.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_bcu.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_alu.vhd"
-vhdl work "../../../../lib/uart/kcuart_tx.vhd"
-vhdl work "../../../../lib/uart/kcuart_rx.vhd"
-vhdl work "../../../../lib/uart/bbfifo_16x8.vhd"
-vhdl work "../../../../lib/misc/dpram_2w2r_virtex4.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_cmd.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/reset_virtex4.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/fifo_sync.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/ddr_phy_virtex4.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/clockgen_virtex4.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_pipeline.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_bui.vhd"
-vhdl work "../../src/ram_ld.vhd"
-vhdl work "../../asm/bootloader/bootloader.ROM_ld.vhd"
-vhdl work "../../../../lib/uart/uart_tx.vhd"
-vhdl work "../../../../lib/uart/uart_rx.vhd"
-vhdl work "../../../../lib/misc/lcd_port.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl_top.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_top.vhd"
-vhdl work "../../src/mips_sys.vhd"

projects/mips_sys/ise91/mips_sys/mips_sys_vhdl.prj

@@ -1,35 +0,0 @@
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_types.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_instr.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\src\sdram_config.vhd"
-vhdl work "W:\vhdl\lib\misc\utils_pkg.vhd"
-vhdl work "W:\vhdl\lib\FIFO\src\fifo_ctrl_pkg.vhd"
-vhdl work "W:\vhdl\lib\misc\dpram_1w2r.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_types.vhd"
-vhdl work "W:\vhdl\lib\FIFO\src\sync_fifo_ctrl.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_shifter.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_reg.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_muldiv.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_idecode_rom.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_cop.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_bcu.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_alu.vhd"
-vhdl work "W:\vhdl\lib\uart\kcuart_tx.vhd"
-vhdl work "W:\vhdl\lib\uart\kcuart_rx.vhd"
-vhdl work "W:\vhdl\lib\uart\bbfifo_16x8.vhd"
-vhdl work "W:\vhdl\lib\misc\dpram_2w2r_virtex4.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_ctrl.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_cmd.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\reset_virtex4.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\fifo_sync.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\ddr_phy_virtex4.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\clockgen_virtex4.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_pipeline.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_bui.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\src\ram_ld.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\asm\bootloader\bootloader.ROM_ld.vhd"
-vhdl work "W:\vhdl\lib\uart\uart_tx.vhd"
-vhdl work "W:\vhdl\lib\uart\uart_rx.vhd"
-vhdl work "W:\vhdl\lib\misc\lcd_port.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_ctrl_top.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_top.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\src\mips_sys.vhd"

projects/mips_sys/ise91/mips_sys/ucf/systest.ucf

@@ -1,245 +0,0 @@
-#
-#     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
-#     SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR
-#     XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION
-#     AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION
-#     OR STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS
-#     IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
-#     AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
-#     FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
-#     WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
-#     IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
-#     REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
-#     INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-#     FOR A PARTICULAR PURPOSE.
-#
-#     (c) Copyright 2005 Xilinx, Inc.
-#     All rights reserved.
-#
-
-CONFIG STEPPING = "ES";
-
-# Bus clock nets
-NET "clk" TNM_NET = "clk";
-TIMESPEC "TS_clk" = PERIOD "clk" 9.9 ns HIGH 50 %;
-
-NET "sys_clk_in" LOC = "AE14";
-#NET sys_clk_in IOSTANDARD = LVCMOS33;
-NET "sys_rst_n_in" LOC = "D6";
-NET sys_rst_n_in PULLUP;
-NET "sys_rst_n_in" TIG;
-NET "rst" TIG;
-
-# Locate DCM/BUFG - Tools can probably figure them out automatically
-#                   but just LOC them down to be safe
-#INST inst_ddr_sdr/ctrl.inst_DCM_BASE_0 LOC = DCM_ADV_X0Y2;
-#INST inst_ddr_sdr/ctrl.inst_DCM_BASE_1 LOC = DCM_ADV_X0Y1;
-
-////////////////////////////////////////////////////////////////////////////
-// Misc Board Signals
-////////////////////////////////////////////////////////////////////////////
-
-NET sys_error<0> LOC = V6;
-NET sys_error<1> LOC = L24;
-#NET sys_error<*> IOSTANDARD = LVCMOS33;
-NET sys_error<*> DRIVE = 2;
-NET sys_error<*> TIG;
-
-////////////////////////////////////////////////////////////////////////////
-// RS-232
-////////////////////////////////////////////////////////////////////////////
-NET sys_rx LOC = W2;
-#NET sys_rx IOSTANDARD = LVCMOS33;
-NET sys_rx TIG;
-NET "sys_tx" LOC = "W1";
-#NET sys_tx IOSTANDARD = LVCMOS33;
-NET "sys_tx" TIG;
-
-////////////////////////////////////////////////////////////////////////////
-// Buttons, LEDs, and DIP Switches
-////////////////////////////////////////////////////////////////////////////
-# GPLED 0-3
-NET "sys_led<0>" LOC = "G5"; #GPLED0
-NET "sys_led<1>" LOC = "G6"; #GPLED1
-NET "sys_led<2>" LOC = "A11"; #GPLED2
-NET "sys_led<3>" LOC = "A12"; #GPLED3
-# North-East-South-West-Center LEDs
-NET "sys_led<4>" LOC = "F9"; # W LED
-NET "sys_led<5>" LOC = "E2"; # N LED
-NET "sys_led<6>" LOC = "E10"; # E LED
-NET "sys_led<7>" LOC = "A5"; # S LED
-NET "sys_led<8>" LOC = "C6"; # C LED
-NET "sys_led<*>" TIG;
-NET "sys_led<*>" SLEW = SLOW;
-NET "sys_led<*>" DRIVE = 2;
-#NET "sys_led<*>" IOSTANDARD = LVCMOS33;
-# North-East-South-West-Center Buttons
-NET "sys_btn<0>" LOC = "E9"; # W Button
-NET "sys_btn<1>" LOC = "E7"; # N Button
-NET "sys_btn<2>" LOC = "F10"; # E Button
-NET "sys_btn<3>" LOC = "A6"; # S Button
-NET "sys_btn<4>" LOC = "B6"; # C Button
-NET "sys_btn<*>" TIG;
-NET "sys_btn<*>" PULLDOWN;
-#NET "sys_btn<*>" IOSTANDARD = LVCMOS33;
-# Dip Switches 1-8
-NET "sys_dip<7>" LOC = "U24"; # DIP SW 8
-NET "sys_dip<6>" LOC = "U25"; # DIP SW 7
-NET "sys_dip<5>" LOC = "V23"; # DIP SW 6
-NET "sys_dip<4>" LOC = "U23"; # DIP SW 5
-NET "sys_dip<3>" LOC = "U26"; # DIP SW 4
-NET "sys_dip<2>" LOC = "T26"; # DIP SW 3
-NET "sys_dip<1>" LOC = "R19"; # DIP SW 2
-NET "sys_dip<0>" LOC = "R20"; # DIP SW 1
-NET "sys_dip<*>" PULLDOWN;
-#NET "sys_dip<*>" IOSTANDARD = LVCMOS33;
-NET "sys_dip<*>" TIG;
-////////////////////////////////////////////////////////////////////////////
-// LCD
-////////////////////////////////////////////////////////////////////////////
-NET sys_lcd_e LOC = AE13; # LCD_E
-#NET sys_lcd_e IOSTANDARD = LVCMOS33;
-NET sys_lcd_e SLEW = SLOW;
-NET sys_lcd_e DRIVE = 2;
-NET sys_lcd_e TIG;
-NET sys_lcd_rs LOC = AC17; # LCD_RS
-#NET sys_lcd_rs IOSTANDARD = LVCMOS33;
-NET sys_lcd_rs SLEW = SLOW;
-NET sys_lcd_rs DRIVE = 2;
-NET sys_lcd_rs TIG;
-NET sys_lcd_rw LOC = AB17; # LCD_RW
-#NET sys_lcd_rw IOSTANDARD = LVCMOS33;
-NET sys_lcd_rw SLEW = SLOW;
-NET sys_lcd_rw DRIVE = 2;
-NET sys_lcd_rw TIG;
-NET sys_lcd_d<3> LOC = AF12; # LCD_DB7
-NET sys_lcd_d<2> LOC = AE12; # LCD_DB6
-NET sys_lcd_d<1> LOC = AC10; # LCD_DB5
-NET sys_lcd_d<0> LOC = AB10; # LCD_DB4
-#NET sys_lcd_d<*> IOSTANDARD = LVCMOS33;
-NET sys_lcd_d<*> SLEW = SLOW;
-NET sys_lcd_d<*> DRIVE = 2;
-NET sys_lcd_d<*> PULLDOWN;
-NET sys_lcd_d<*> TIG;
-
-#------------------------------------------------------------------------------
-# IO Pad Location Constraints / Properties for DDR Controllers
-#------------------------------------------------------------------------------
-
-NET sys_sdr_a_q<0>  	LOC = C26; # DDR_A0
-NET sys_sdr_a_q<1>  	LOC = E17; # DDR_A1
-NET sys_sdr_a_q<2>  	LOC = D18; # DDR_A2
-NET sys_sdr_a_q<3>  	LOC = C19; # DDR_A3
-NET sys_sdr_a_q<4>  	LOC = F17; # DDR_A4
-NET sys_sdr_a_q<5>  	LOC = B18; # DDR_A5
-NET sys_sdr_a_q<6>  	LOC = B20; # DDR_A6
-NET sys_sdr_a_q<7>  	LOC = C20; # DDR_A7
-NET sys_sdr_a_q<8>  	LOC = D20; # DDR_A8
-NET sys_sdr_a_q<9>  	LOC = C21; # DDR_A9
-NET sys_sdr_a_q<10> 	LOC = A18; # DDR_A10
-NET sys_sdr_a_q<11> 	LOC = B21; # DDR_A11
-NET sys_sdr_a_q<12> 	LOC = A24; # DDR_A12
-NET sys_sdr_ba_q<0>  	LOC = B12; # DDR_BA0
-NET sys_sdr_ba_q<1>  	LOC = A16; # DDR_BA1
-NET sys_sdr_cas_qn		LOC = F23; # DDR_CAS_N
-NET sys_sdr_cke_q		LOC = G22; # DDR_CKE
-NET sys_sdr_cs_qn		LOC = G21; # DDR_CS_N
-NET sys_sdr_ras_qn		LOC = F24; # DDR_RAS_N
-NET sys_sdr_we_qn		LOC = A23; # DDR_WE_N
-
-NET sys_sdr_clk_p		LOC = A10; # DDR_CK1_P
-NET sys_sdr_clk_fb	LOC = B13; # DDR_CK1_P (FEEDBACK)
-NET sys_sdr_clk_n		LOC = B10; # DDR_CK1_N
-
-NET sys_sdr_dm_q<0>  	LOC = G19; # DDR_DM0
-NET sys_sdr_dm_q<1>  	LOC = G24; # DDR_DM1
-NET sys_sdr_dm_q<2>  	LOC = G20; # DDR_DM2
-NET sys_sdr_dm_q<3>  	LOC = C22; # DDR_DM3
-
-NET sys_sdr_dqs_q<0> 	LOC = D25; # DDR_DQS0
-NET sys_sdr_dqs_q<1> 	LOC = G18; # DDR_DQS1
-NET sys_sdr_dqs_q<2> 	LOC = G17; # DDR_DQS2
-NET sys_sdr_dqs_q<3> 	LOC = D26; # DDR_DQS3
-
-NET sys_sdr_data<0> 	LOC = H20; # DDR_D0
-NET sys_sdr_data<1> 	LOC = E23; # DDR_D1
-NET sys_sdr_data<2> 	LOC = H26; # DDR_D2
-NET sys_sdr_data<3> 	LOC = H22; # DDR_D3
-NET sys_sdr_data<4> 	LOC = E25; # DDR_D4
-NET sys_sdr_data<5> 	LOC = E26; # DDR_D5
-NET sys_sdr_data<6> 	LOC = F26; # DDR_D6
-NET sys_sdr_data<7> 	LOC = E24; # DDR_D7
-NET sys_sdr_data<8> 	LOC = E20; # DDR_D8
-NET sys_sdr_data<9> 	LOC = A22; # DDR_D9
-NET sys_sdr_data<10>	LOC = C23; # DDR_D10
-NET sys_sdr_data<11>	LOC = C24; # DDR_D11
-NET sys_sdr_data<12>	LOC = A20; # DDR_D12
-NET sys_sdr_data<13>	LOC = A21; # DDR_D13
-NET sys_sdr_data<14>	LOC = D24; # DDR_D14
-NET sys_sdr_data<15>	LOC = E18; # DDR_D15
-NET sys_sdr_data<16>	LOC = F18; # DDR_D16
-NET sys_sdr_data<17>	LOC = A19; # DDR_D17
-NET sys_sdr_data<18>	LOC = F19; # DDR_D18
-NET sys_sdr_data<19>	LOC = B23; # DDR_D19
-NET sys_sdr_data<20>	LOC = E21; # DDR_D20
-NET sys_sdr_data<21>	LOC = D22; # DDR_D21
-NET sys_sdr_data<22>	LOC = D23; # DDR_D22
-NET sys_sdr_data<23>	LOC = B24; # DDR_D23
-NET sys_sdr_data<24>	LOC = E22; # DDR_D24
-NET sys_sdr_data<25>	LOC = F20; # DDR_D25
-NET sys_sdr_data<26>	LOC = H23; # DDR_D26
-NET sys_sdr_data<27>	LOC = G25; # DDR_D27
-NET sys_sdr_data<28>	LOC = G26; # DDR_D28
-NET sys_sdr_data<29>	LOC = H25; # DDR_D29
-NET sys_sdr_data<30>	LOC = H24; # DDR_D30
-NET sys_sdr_data<31>	LOC = H21; # DDR_D31
-
-NET sys_sdr_a_q<*>  	IOSTANDARD = SSTL2_I;
-NET sys_sdr_a_q<*>	FAST; 
-
-NET sys_sdr_ba_q<*> 	IOSTANDARD = SSTL2_I;
-NET sys_sdr_ba_q<*>	FAST; 
-
-NET sys_sdr_cas_qn  	IOSTANDARD = SSTL2_I;
-NET sys_sdr_cas_qn	FAST; 
-
-NET sys_sdr_cke_q   	IOSTANDARD = SSTL2_I;
-NET sys_sdr_cke_q		FAST; 
-
-NET sys_sdr_clk_p		IOSTANDARD = SSTL2_I;
-NET sys_sdr_clk_p		FAST; 
-NET sys_sdr_clk_fb	IOSTANDARD = LVCMOS25;
-NET sys_sdr_clk_fb	IOBDELAY = NONE; 
-NET sys_sdr_clk_n		IOSTANDARD = SSTL2_I;
-NET sys_sdr_clk_n		FAST; 
-
-NET sys_sdr_cas_qn	IOSTANDARD = SSTL2_I;
-NET sys_sdr_cas_qn	FAST; 
-
-NET sys_sdr_cs_qn		IOSTANDARD = SSTL2_I;
-NET sys_sdr_cs_qn		FAST; 
-
-NET sys_sdr_ras_qn	IOSTANDARD = SSTL2_I;
-NET sys_sdr_ras_qn	FAST; 
-
-NET sys_sdr_we_qn		IOSTANDARD = SSTL2_I;
-NET sys_sdr_we_qn		FAST; 
-
-NET sys_sdr_dqs_q<*> IOSTANDARD = SSTL2_II;
-NET sys_sdr_dqs_q<*>	IOBDELAY = NONE; 
-NET sys_sdr_dqs_q<*>	FAST; 
-
-NET sys_sdr_dm_q<*>  IOSTANDARD = SSTL2_II;
-NET sys_sdr_dm_q<*>	IOBDELAY = NONE; 
-NET sys_sdr_dm_q<*>	FAST; 
-
-NET sys_sdr_data<*>  IOSTANDARD = SSTL2_II;
-NET sys_sdr_data<*>	IOBDELAY = NONE; 
-NET sys_sdr_data<*>	FAST; 
-
-#NET "sys_sdr_data<*>" OFFSET=OUT 2.5 ns BEFORE "sys_sdr_clk_n";
-
-
-# Timing Constraint for DDR Feedback Clock
-NET sys_sdr_clk_fb FEEDBACK = 1 ns NET sys_sdr_clk_p;
-

projects/mips_sys/ise92/mips_sys/mips_sys.prj

@@ -1,39 +0,0 @@
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_types.vhd"
-vhdl work "../../src/sdram_config.vhd"
-vhdl work "../../../../lib/misc/utils_pkg.vhd"
-vhdl work "../../../../lib/FIFO/src/fifo_ctrl_pkg.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_instr.vhd"
-vhdl work "../../../../lib/misc/dpram_2w2r_virtex4.vhd"
-vhdl work "../../../../lib/misc/dpram_1w1r_dist.vhd"
-vhdl work "../../../../lib/misc/dpram_1w1r.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_types.vhd"
-vhdl work "../../../../lib/FIFO/src/sync_fifo_ctrl.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_cmd.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/reset_virtex4.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/fifo_sync.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/ddr_phy_virtex4.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/clockgen_virtex4.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_shifter.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_reg.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_muldiv.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_idecode_rom.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_cop.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_bcu.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_alu.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/icache.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/dcache.vhd"
-vhdl work "../../../../lib/uart/kcuart_tx.vhd"
-vhdl work "../../../../lib/uart/kcuart_rx.vhd"
-vhdl work "../../../../lib/uart/bbfifo_16x8.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl_top.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_pipeline.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_bui.vhd"
-vhdl work "../../src/ram_ld.vhd"
-vhdl work "../../src/bootloader.ROM_ld.vhd"
-vhdl work "../../../../lib/uart/uart_tx.vhd"
-vhdl work "../../../../lib/uart/uart_rx.vhd"
-vhdl work "../../../../lib/misc/lcd_port.vhd"
-vhdl work "../../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl_frontend.vhd"
-vhdl work "../../../../lib/CPUs/MIPS/src/core/mips_top.vhd"
-vhdl work "../../src/mips_sys.vhd"

projects/mips_sys/ise92/mips_sys/mips_sys_vhdl.prj

@@ -1,39 +0,0 @@
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_types.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\src\sdram_config.vhd"
-vhdl work "W:\vhdl\lib\misc\utils_pkg.vhd"
-vhdl work "W:\vhdl\lib\FIFO\src\fifo_ctrl_pkg.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_instr.vhd"
-vhdl work "W:\vhdl\lib\misc\dpram_2w2r_virtex4.vhd"
-vhdl work "W:\vhdl\lib\misc\dpram_1w1r_dist.vhd"
-vhdl work "W:\vhdl\lib\misc\dpram_1w1r.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_types.vhd"
-vhdl work "W:\vhdl\lib\FIFO\src\sync_fifo_ctrl.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_ctrl.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_cmd.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\reset_virtex4.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\fifo_sync.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\ddr_phy_virtex4.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\clockgen_virtex4.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_shifter.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_reg.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_muldiv.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_idecode_rom.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_cop.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_bcu.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_alu.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\icache.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\dcache.vhd"
-vhdl work "W:\vhdl\lib\uart\kcuart_tx.vhd"
-vhdl work "W:\vhdl\lib\uart\kcuart_rx.vhd"
-vhdl work "W:\vhdl\lib\uart\bbfifo_16x8.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_ctrl_top.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_pipeline.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_bui.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\src\ram_ld.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\src\bootloader.ROM_ld.vhd"
-vhdl work "W:\vhdl\lib\uart\uart_tx.vhd"
-vhdl work "W:\vhdl\lib\uart\uart_rx.vhd"
-vhdl work "W:\vhdl\lib\misc\lcd_port.vhd"
-vhdl work "W:\vhdl\lib\SDRAM\ddr_sdr_v1_4\src\sdram_ctrl_frontend.vhd"
-vhdl work "W:\vhdl\lib\CPUs\MIPS\src\core\mips_top.vhd"
-vhdl work "W:\vhdl\projects\mips_sys\src\mips_sys.vhd"

projects/mips_sys/ise92/mips_sys/ucf/systest.ucf

@@ -1,245 +0,0 @@
-#
-#     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
-#     SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR
-#     XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION
-#     AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION
-#     OR STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS
-#     IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
-#     AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
-#     FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
-#     WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
-#     IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
-#     REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
-#     INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-#     FOR A PARTICULAR PURPOSE.
-#
-#     (c) Copyright 2005 Xilinx, Inc.
-#     All rights reserved.
-#
-
-CONFIG STEPPING = "ES";
-
-# Bus clock nets
-NET "clk" TNM_NET = "clk";
-TIMESPEC "TS_clk" = PERIOD "clk" 9.9 ns HIGH 50 %;
-
-NET "sys_clk_in" LOC = "AE14";
-#NET sys_clk_in IOSTANDARD = LVCMOS33;
-NET "sys_rst_n_in" LOC = "D6";
-NET sys_rst_n_in PULLUP;
-NET "sys_rst_n_in" TIG;
-NET "rst" TIG;
-
-# Locate DCM/BUFG - Tools can probably figure them out automatically
-#                   but just LOC them down to be safe
-#INST inst_ddr_sdr/ctrl.inst_DCM_BASE_0 LOC = DCM_ADV_X0Y2;
-#INST inst_ddr_sdr/ctrl.inst_DCM_BASE_1 LOC = DCM_ADV_X0Y1;
-
-////////////////////////////////////////////////////////////////////////////
-// Misc Board Signals
-////////////////////////////////////////////////////////////////////////////
-
-NET sys_error<0> LOC = V6;
-NET sys_error<1> LOC = L24;
-#NET sys_error<*> IOSTANDARD = LVCMOS33;
-NET sys_error<*> DRIVE = 2;
-NET sys_error<*> TIG;
-
-////////////////////////////////////////////////////////////////////////////
-// RS-232
-////////////////////////////////////////////////////////////////////////////
-NET sys_rx LOC = W2;
-#NET sys_rx IOSTANDARD = LVCMOS33;
-NET sys_rx TIG;
-NET "sys_tx" LOC = "W1";
-#NET sys_tx IOSTANDARD = LVCMOS33;
-NET "sys_tx" TIG;
-
-////////////////////////////////////////////////////////////////////////////
-// Buttons, LEDs, and DIP Switches
-////////////////////////////////////////////////////////////////////////////
-# GPLED 0-3
-NET "sys_led<0>" LOC = "G5"; #GPLED0
-NET "sys_led<1>" LOC = "G6"; #GPLED1
-NET "sys_led<2>" LOC = "A11"; #GPLED2
-NET "sys_led<3>" LOC = "A12"; #GPLED3
-# North-East-South-West-Center LEDs
-NET "sys_led<4>" LOC = "F9"; # W LED
-NET "sys_led<5>" LOC = "E2"; # N LED
-NET "sys_led<6>" LOC = "E10"; # E LED
-NET "sys_led<7>" LOC = "A5"; # S LED
-NET "sys_led<8>" LOC = "C6"; # C LED
-NET "sys_led<*>" TIG;
-NET "sys_led<*>" SLEW = SLOW;
-NET "sys_led<*>" DRIVE = 2;
-#NET "sys_led<*>" IOSTANDARD = LVCMOS33;
-# North-East-South-West-Center Buttons
-NET "sys_btn<0>" LOC = "E9"; # W Button
-NET "sys_btn<1>" LOC = "E7"; # N Button
-NET "sys_btn<2>" LOC = "F10"; # E Button
-NET "sys_btn<3>" LOC = "A6"; # S Button
-NET "sys_btn<4>" LOC = "B6"; # C Button
-NET "sys_btn<*>" TIG;
-NET "sys_btn<*>" PULLDOWN;
-#NET "sys_btn<*>" IOSTANDARD = LVCMOS33;
-# Dip Switches 1-8
-NET "sys_dip<7>" LOC = "U24"; # DIP SW 8
-NET "sys_dip<6>" LOC = "U25"; # DIP SW 7
-NET "sys_dip<5>" LOC = "V23"; # DIP SW 6
-NET "sys_dip<4>" LOC = "U23"; # DIP SW 5
-NET "sys_dip<3>" LOC = "U26"; # DIP SW 4
-NET "sys_dip<2>" LOC = "T26"; # DIP SW 3
-NET "sys_dip<1>" LOC = "R19"; # DIP SW 2
-NET "sys_dip<0>" LOC = "R20"; # DIP SW 1
-NET "sys_dip<*>" PULLDOWN;
-#NET "sys_dip<*>" IOSTANDARD = LVCMOS33;
-NET "sys_dip<*>" TIG;
-////////////////////////////////////////////////////////////////////////////
-// LCD
-////////////////////////////////////////////////////////////////////////////
-NET sys_lcd_e LOC = AE13; # LCD_E
-#NET sys_lcd_e IOSTANDARD = LVCMOS33;
-NET sys_lcd_e SLEW = SLOW;
-NET sys_lcd_e DRIVE = 2;
-NET sys_lcd_e TIG;
-NET sys_lcd_rs LOC = AC17; # LCD_RS
-#NET sys_lcd_rs IOSTANDARD = LVCMOS33;
-NET sys_lcd_rs SLEW = SLOW;
-NET sys_lcd_rs DRIVE = 2;
-NET sys_lcd_rs TIG;
-NET sys_lcd_rw LOC = AB17; # LCD_RW
-#NET sys_lcd_rw IOSTANDARD = LVCMOS33;
-NET sys_lcd_rw SLEW = SLOW;
-NET sys_lcd_rw DRIVE = 2;
-NET sys_lcd_rw TIG;
-NET sys_lcd_d<3> LOC = AF12; # LCD_DB7
-NET sys_lcd_d<2> LOC = AE12; # LCD_DB6
-NET sys_lcd_d<1> LOC = AC10; # LCD_DB5
-NET sys_lcd_d<0> LOC = AB10; # LCD_DB4
-#NET sys_lcd_d<*> IOSTANDARD = LVCMOS33;
-NET sys_lcd_d<*> SLEW = SLOW;
-NET sys_lcd_d<*> DRIVE = 2;
-NET sys_lcd_d<*> PULLDOWN;
-NET sys_lcd_d<*> TIG;
-
-#------------------------------------------------------------------------------
-# IO Pad Location Constraints / Properties for DDR Controllers
-#------------------------------------------------------------------------------
-
-NET sys_sdr_a_q<0>  	LOC = C26; # DDR_A0
-NET sys_sdr_a_q<1>  	LOC = E17; # DDR_A1
-NET sys_sdr_a_q<2>  	LOC = D18; # DDR_A2
-NET sys_sdr_a_q<3>  	LOC = C19; # DDR_A3
-NET sys_sdr_a_q<4>  	LOC = F17; # DDR_A4
-NET sys_sdr_a_q<5>  	LOC = B18; # DDR_A5
-NET sys_sdr_a_q<6>  	LOC = B20; # DDR_A6
-NET sys_sdr_a_q<7>  	LOC = C20; # DDR_A7
-NET sys_sdr_a_q<8>  	LOC = D20; # DDR_A8
-NET sys_sdr_a_q<9>  	LOC = C21; # DDR_A9
-NET sys_sdr_a_q<10> 	LOC = A18; # DDR_A10
-NET sys_sdr_a_q<11> 	LOC = B21; # DDR_A11
-NET sys_sdr_a_q<12> 	LOC = A24; # DDR_A12
-NET sys_sdr_ba_q<0>  	LOC = B12; # DDR_BA0
-NET sys_sdr_ba_q<1>  	LOC = A16; # DDR_BA1
-NET sys_sdr_cas_qn		LOC = F23; # DDR_CAS_N
-NET sys_sdr_cke_q		LOC = G22; # DDR_CKE
-NET sys_sdr_cs_qn		LOC = G21; # DDR_CS_N
-NET sys_sdr_ras_qn		LOC = F24; # DDR_RAS_N
-NET sys_sdr_we_qn		LOC = A23; # DDR_WE_N
-
-NET sys_sdr_clk_p		LOC = A10; # DDR_CK1_P
-NET sys_sdr_clk_fb	LOC = B13; # DDR_CK1_P (FEEDBACK)
-NET sys_sdr_clk_n		LOC = B10; # DDR_CK1_N
-
-NET sys_sdr_dm_q<0>  	LOC = G19; # DDR_DM0
-NET sys_sdr_dm_q<1>  	LOC = G24; # DDR_DM1
-NET sys_sdr_dm_q<2>  	LOC = G20; # DDR_DM2
-NET sys_sdr_dm_q<3>  	LOC = C22; # DDR_DM3
-
-NET sys_sdr_dqs_q<0> 	LOC = D25; # DDR_DQS0
-NET sys_sdr_dqs_q<1> 	LOC = G18; # DDR_DQS1
-NET sys_sdr_dqs_q<2> 	LOC = G17; # DDR_DQS2
-NET sys_sdr_dqs_q<3> 	LOC = D26; # DDR_DQS3
-
-NET sys_sdr_data<0> 	LOC = H20; # DDR_D0
-NET sys_sdr_data<1> 	LOC = E23; # DDR_D1
-NET sys_sdr_data<2> 	LOC = H26; # DDR_D2
-NET sys_sdr_data<3> 	LOC = H22; # DDR_D3
-NET sys_sdr_data<4> 	LOC = E25; # DDR_D4
-NET sys_sdr_data<5> 	LOC = E26; # DDR_D5
-NET sys_sdr_data<6> 	LOC = F26; # DDR_D6
-NET sys_sdr_data<7> 	LOC = E24; # DDR_D7
-NET sys_sdr_data<8> 	LOC = E20; # DDR_D8
-NET sys_sdr_data<9> 	LOC = A22; # DDR_D9
-NET sys_sdr_data<10>	LOC = C23; # DDR_D10
-NET sys_sdr_data<11>	LOC = C24; # DDR_D11
-NET sys_sdr_data<12>	LOC = A20; # DDR_D12
-NET sys_sdr_data<13>	LOC = A21; # DDR_D13
-NET sys_sdr_data<14>	LOC = D24; # DDR_D14
-NET sys_sdr_data<15>	LOC = E18; # DDR_D15
-NET sys_sdr_data<16>	LOC = F18; # DDR_D16
-NET sys_sdr_data<17>	LOC = A19; # DDR_D17
-NET sys_sdr_data<18>	LOC = F19; # DDR_D18
-NET sys_sdr_data<19>	LOC = B23; # DDR_D19
-NET sys_sdr_data<20>	LOC = E21; # DDR_D20
-NET sys_sdr_data<21>	LOC = D22; # DDR_D21
-NET sys_sdr_data<22>	LOC = D23; # DDR_D22
-NET sys_sdr_data<23>	LOC = B24; # DDR_D23
-NET sys_sdr_data<24>	LOC = E22; # DDR_D24
-NET sys_sdr_data<25>	LOC = F20; # DDR_D25
-NET sys_sdr_data<26>	LOC = H23; # DDR_D26
-NET sys_sdr_data<27>	LOC = G25; # DDR_D27
-NET sys_sdr_data<28>	LOC = G26; # DDR_D28
-NET sys_sdr_data<29>	LOC = H25; # DDR_D29
-NET sys_sdr_data<30>	LOC = H24; # DDR_D30
-NET sys_sdr_data<31>	LOC = H21; # DDR_D31
-
-NET sys_sdr_a_q<*>  	IOSTANDARD = SSTL2_I;
-NET sys_sdr_a_q<*>	FAST; 
-
-NET sys_sdr_ba_q<*> 	IOSTANDARD = SSTL2_I;
-NET sys_sdr_ba_q<*>	FAST; 
-
-NET sys_sdr_cas_qn  	IOSTANDARD = SSTL2_I;
-NET sys_sdr_cas_qn	FAST; 
-
-NET sys_sdr_cke_q   	IOSTANDARD = SSTL2_I;
-NET sys_sdr_cke_q		FAST; 
-
-NET sys_sdr_clk_p		IOSTANDARD = SSTL2_I;
-NET sys_sdr_clk_p		FAST; 
-NET sys_sdr_clk_fb	IOSTANDARD = LVCMOS25;
-NET sys_sdr_clk_fb	IOBDELAY = NONE; 
-NET sys_sdr_clk_n		IOSTANDARD = SSTL2_I;
-NET sys_sdr_clk_n		FAST; 
-
-NET sys_sdr_cas_qn	IOSTANDARD = SSTL2_I;
-NET sys_sdr_cas_qn	FAST; 
-
-NET sys_sdr_cs_qn		IOSTANDARD = SSTL2_I;
-NET sys_sdr_cs_qn		FAST; 
-
-NET sys_sdr_ras_qn	IOSTANDARD = SSTL2_I;
-NET sys_sdr_ras_qn	FAST; 
-
-NET sys_sdr_we_qn		IOSTANDARD = SSTL2_I;
-NET sys_sdr_we_qn		FAST; 
-
-NET sys_sdr_dqs_q<*> IOSTANDARD = SSTL2_II;
-NET sys_sdr_dqs_q<*>	IOBDELAY = NONE; 
-NET sys_sdr_dqs_q<*>	FAST; 
-
-NET sys_sdr_dm_q<*>  IOSTANDARD = SSTL2_II;
-NET sys_sdr_dm_q<*>	IOBDELAY = NONE; 
-NET sys_sdr_dm_q<*>	FAST; 
-
-NET sys_sdr_data<*>  IOSTANDARD = SSTL2_II;
-NET sys_sdr_data<*>	IOBDELAY = NONE; 
-NET sys_sdr_data<*>	FAST; 
-
-#NET "sys_sdr_data<*>" OFFSET=OUT 2.5 ns BEFORE "sys_sdr_clk_n";
-
-
-# Timing Constraint for DDR Feedback Clock
-NET sys_sdr_clk_fb FEEDBACK = 1 ns NET sys_sdr_clk_p;
-

projects/mips_sys/sim/tb_mips_sys.fdo

@@ -1,70 +0,0 @@
-## NOTE:  Do not edit this file.
-##
-vlib work
-# Configs
-vcom -explicit  -93 "../src/sdram_config_sim.vhd"
-
-# Packages
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_types.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_instr.vhd"
-vcom -explicit  -93 "../../../lib/FIFO/src/fifo_ctrl_pkg.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_types.vhd"
-vcom -explicit  -93 "../../../lib/misc/utils_pkg.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/mt46v16m16.vhd"
-
-# RAMs
-vcom -explicit  -93 "../../../lib/misc/dpram_2w2r.vhd"
-vcom -explicit  -93 "../../../lib/misc/dpram_1w1r.vhd"
-vcom -explicit  -93 "../../../lib/misc/dpram_1w1r_dist.vhd"
-
-# CPU
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_idecode_rom.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_reg.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_shifter.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_alu.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_bcu.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_pipeline.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_muldiv.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_cop.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/dcache.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/icache.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_bui.vhd"
-vcom -explicit  -93 "../../../lib/CPUs/MIPS/src/core/mips_top.vhd"
-vcom -explicit  -93 "../src/ram_sim.vhd"
-vcom -explicit  -93 "../src/bootloader.ROM.vhd"
-
-# UART
-vcom -explicit  -93 "../../../lib/uart/bbfifo_16x8.vhd"
-vcom -explicit  -93 "../../../lib/uart/kcuart_rx.vhd"
-vcom -explicit  -93 "../../../lib/uart/kcuart_tx.vhd"
-vcom -explicit  -93 "../../../lib/uart/uart_rx.vhd"
-vcom -explicit  -93 "../../../lib/uart/uart_tx.vhd"
-
-# LCD
-vcom -explicit  -93 "../../../lib/misc/lcd_port.vhd"
-
-# FIFOS
-vcom -explicit  -93 "../../../lib/FIFO/src/gray_counter.vhd"
-vcom -explicit  -93 "../../../lib/FIFO/src/sync_fifo_ctrl.vhd"
-
-# SDRAM
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_cmd.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/reset_virtex4.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/ddr_phy_virtex4.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/clockgen_virtex4.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/fifo_sync.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl_top.vhd"
-vcom -explicit  -93 "../../../lib/SDRAM/ddr_sdr_v1_4/src/sdram_ctrl_frontend.vhd"
-
-# Top and TB
-vcom -explicit  -93 "../src/mips_sys_sim.vhd"
-vcom -explicit  -93 "../src/tb_mips_sys.vhd"
-
-vsim -t 1ps   -lib work tb_mips_sys
-do {tb_mips_sys.wdo}
-view wave
-view structure
-view signals
-run 5ms
-			 

projects/mips_sys/sim/tb_mips_sys.wdo

@@ -1,243 +0,0 @@
-onerror {resume}
-quietly WaveActivateNextPane {} 0
-add wave -noupdate -divider UUT
-add wave -noupdate -format Logic /tb_mips_sys/sys_rst_n_in
-add wave -noupdate -format Logic /tb_mips_sys/sys_clk_in
-add wave -noupdate -format Literal /tb_mips_sys/dip
-add wave -noupdate -format Literal /tb_mips_sys/btn
-add wave -noupdate -format Literal /tb_mips_sys/led
-add wave -noupdate -format Logic /tb_mips_sys/sys_rx
-add wave -noupdate -format Logic /tb_mips_sys/sys_tx
-add wave -noupdate -format Literal /tb_mips_sys/sys_lcd_d
-add wave -noupdate -format Logic /tb_mips_sys/sys_lcd_e
-add wave -noupdate -format Logic /tb_mips_sys/sys_lcd_rs
-add wave -noupdate -format Logic /tb_mips_sys/sys_lcd_rw
-add wave -noupdate -format Logic /tb_mips_sys/refresh
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_clk_p
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_clk_n
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_cke_q
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_cs_qn
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_ras_qn
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_cas_qn
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_we_qn
-add wave -noupdate -format Literal /tb_mips_sys/sys_sdr_dm_q
-add wave -noupdate -format Literal /tb_mips_sys/sys_sdr_dqs_q
-add wave -noupdate -format Literal /tb_mips_sys/sys_sdr_ba_q
-add wave -noupdate -format Literal /tb_mips_sys/sys_sdr_a_q
-add wave -noupdate -format Literal /tb_mips_sys/sys_sdr_data
-add wave -noupdate -format Literal /tb_mips_sys/sys_error
-add wave -noupdate -format Logic /tb_mips_sys/sys_sdr_clk_fb
-add wave -noupdate -divider {MIPS TOP}
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/hdu
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/sdu
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/events
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_wait
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/status
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/epc
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/cause
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/badvaddr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/exc_code
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/status_save
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/status_rest
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/exception
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/ir
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/ir_valid
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/din
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/dout
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/stat_reg_we
-add wave -noupdate -format Literal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/ctrl_in
-add wave -noupdate -format Literal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/ctrl_out
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/exc_state
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/eflags_reg_we
-add wave -noupdate -format Literal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/eflags
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/cpu_run
-add wave -noupdate -format Literal -radix hexadecimal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_reg_dual/reg_mem
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Literal -radix hexadecimal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/id_stage
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic -label .exc_commit /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/ctrl_out.exc_commit
-add wave -noupdate -format Logic -label .exc_pending /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/ctrl_out.exc_pending
-add wave -noupdate -format Logic -label .exc_exit /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/ctrl_out.exc_exit
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/exc_state
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/epc
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/status
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/cause
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/sdu
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/run_en
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/cpu_rst
-add wave -noupdate -format Literal -radix hexadecimal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/ex_stage
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_busy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_rdy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/dcache_busy1
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/dcache_busy2
-add wave -noupdate -format Literal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/sdu
-add wave -noupdate -format Literal -radix hexadecimal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/mem_stage
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Literal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/sdu
-add wave -noupdate -format Literal -radix hexadecimal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/wb_stage
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/status
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/exception
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/cause
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/inst_cop/epc
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/rst
-add wave -noupdate -divider BUI
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_re
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_en
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_addr
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/dcache_req
-add wave -noupdate -format Logic /tb_mips_sys/uut/mem_en
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_addr
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/bus_req
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/dmem_ack
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/dmem_valid
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_rdy
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/s
-add wave -noupdate -divider {Memory Bus}
-add wave -noupdate -format Logic /tb_mips_sys/uut/mem_en
-add wave -noupdate -format Logic /tb_mips_sys/uut/mem_re
-add wave -noupdate -format Logic /tb_mips_sys/uut/mem_re_r
-add wave -noupdate -format Literal /tb_mips_sys/uut/mem_we_r
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_re
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_we
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_ce
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_din
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_dout
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_valid
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/mem_rdy
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/s
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_sdram_ctrl_frontend/busy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_sdram_ctrl_frontend/en
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_sdram_ctrl_frontend/r_wn
-add wave -noupdate -divider {CPU DMEM}
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/contention
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_busy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_rdy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_en
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_re
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_we
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_dout
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_din
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_dmem_addr
-add wave -noupdate -divider {CPU IMEM}
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_imem_en
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_imem_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_imem_din
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_imem_rdy
-add wave -noupdate -divider {User ROM}
-add wave -noupdate -format Logic /tb_mips_sys/sys_user_rom_clk
-add wave -noupdate -format Logic /tb_mips_sys/sys_user_rom_en
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/sys_user_rom_din
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/sys_user_rom_addr
-add wave -noupdate -divider UUT
-add wave -noupdate -format Literal -radix hexadecimal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/pc
-add wave -noupdate -format Logic /tb_mips_sys/uut/clk
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/sdr_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/sdr_buf_in
-add wave -noupdate -format Logic /tb_mips_sys/uut/sdr_busy_q
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/sdr_udata_in
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/sdr_udata_out_q
-add wave -noupdate -format Logic /tb_mips_sys/uut/sdr_udata_req_wr
-add wave -noupdate -format Logic /tb_mips_sys/uut/sdr_udata_vld_q
-add wave -noupdate -format Literal /tb_mips_sys/uut/st
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/sys_sdr_a_q
-add wave -noupdate -format Literal /tb_mips_sys/uut/sys_sdr_ba_q
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_cas_qn
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_cke_q
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_clk_fb
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_clk_n
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_clk_p
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_cs_qn
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/sys_sdr_data
-add wave -noupdate -format Literal /tb_mips_sys/uut/sys_sdr_dm_q
-add wave -noupdate -format Literal /tb_mips_sys/uut/sys_sdr_dqs_q
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_ras_qn
-add wave -noupdate -format Logic /tb_mips_sys/uut/sys_sdr_we_qn
-add wave -noupdate -format Literal /tb_mips_sys/uut/tick_usec
-add wave -noupdate -divider I-Cache
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/cpu_rst
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/cpu_wait
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_pipeline/run_en
-add wave -noupdate -format Literal -radix hexadecimal -expand /tb_mips_sys/uut/inst_mips_top/inst_pipeline/pc
-add wave -noupdate -format Logic -label .branch -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_pipeline/ex_stage.ctrl.branch
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/clk
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/s
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/s
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/cpu_en
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/cpu_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/cpu_dout
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/cache_busy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/cache_miss
-add wave -noupdate -format Literal -label tag_ram -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/inst_tag_ram/ram
-add wave -noupdate -format Literal -label data_ram -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/inst_data_ram/ram
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_req
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_gnt
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_en
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_din
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_valid
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_rdy
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/data_ram_addr_rd
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/data_ram_addr_wr
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/data_ram_we
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/ram_index_count
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/mem_index_count
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_icache/data_write
-add wave -noupdate -divider D-Cache
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_en
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_r_wn
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_we
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_din
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_dout
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_busy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/mem_req
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/mem_gnt
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/mem_en
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/mem_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/mem_din
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/mem_valid
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/mem_rdy
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/s
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cache_read_miss
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cache_write_miss
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cache_busy
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_reg_en
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/was_miss
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/data_write
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_dram_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_dram_dout
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_dram_din
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_data_reg
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_we_reg
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/ctrl_force_we
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_was_write
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/ctrl_dram_addr
-add wave -noupdate -format Literal -radix hexadecimal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/ctrl_dram_din
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/ctrl_dram_we
-add wave -noupdate -format Literal /tb_mips_sys/uut/inst_mips_top/inst_bui/inst_dcache/cpu_dram_we
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/dcached
-add wave -noupdate -format Logic /tb_mips_sys/uut/inst_mips_top/inst_bui/duncached_access
-TreeUpdate [SetDefaultTree]
-WaveRestoreCursors {{Cursor 2} {49999842932 ps} 0} {{Cursor 100} {1165623518 ps} 0}
-configure wave -namecolwidth 218
-configure wave -valuecolwidth 100
-configure wave -justifyvalue left
-configure wave -signalnamewidth 1
-configure wave -snapdistance 10
-configure wave -datasetprefix 0
-configure wave -rowmargin 4
-configure wave -childrowmargin 2
-configure wave -gridoffset 0
-configure wave -gridperiod 100
-configure wave -griddelta 40
-configure wave -timeline 1
-update
-WaveRestoreZoom {1165509887 ps} {1165713125 ps}

projects/mips_sys/src/mips_pipeline.vhd

@@ -1,886 +0,0 @@
---------------------------------------------------------------------------
--- Project: JIPS, a portable 32-bit RISC CPU written in VHDL
--- This file: The pipeline
---
--- Copyright (C) 2008 J. Ahrensfeld
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 3 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see <http://www.gnu.org/licenses/>.
---
--- For questions and ideas, please contact the author at jens@jayfield.org
---
---------------------------------------------------------------------------
-library IEEE;
-use IEEE.STD_LOGIC_1164.ALL;
-use IEEE.numeric_std.ALL;
-
-library work;
-use work.mips_types.all;
-use work.mips_instr.all;
-
-entity pipeline is
-	Port
-	(
-		rst			: in  STD_LOGIC;
-		clk			: in  STD_LOGIC;
-		halt		: in  STD_LOGIC;
-		int			: in  unsigned(5 downto 0);
-		imem_rdy	: in  STD_LOGIC;
-		imem_en		: out STD_LOGIC;
-		imem_addr	: out word_t;
-		imem_data	: in  word_t;
-		dmem_rdy	: in  STD_LOGIC;
-		dmem_en		: out STD_LOGIC;
-		dmem_re		: out STD_LOGIC;
-		dmem_we		: out unsigned(3 downto 0);
-		dmem_addr	: out word_t;
-		dmem_din	: in  word_t;
-		dmem_dout	: out word_t
-	);
-end pipeline;
-
-architecture Behavioral of pipeline is
-
---------------------------------------------------------------------------
-	COMPONENT reg_dual is
-	Generic
-	(
-		addr_width : integer := 3;
-		data_width : integer := 8
-	);
-	Port 
-	(
-		clk_w		: in  STD_LOGIC;
-		en			: in  STD_LOGIC;
-		we			: in  STD_LOGIC;
-		wptr		: in  unsigned (addr_width-1 downto 0);
-		din			: in  unsigned (data_width-1 downto 0);
-		rptr_a		: in  unsigned (addr_width-1 downto 0);
-		rptr_b		: in  unsigned (addr_width-1 downto 0);
-		dout_a		: out unsigned (data_width-1 downto 0);
-		dout_b		: out unsigned (data_width-1 downto 0)
-	);
-	END COMPONENT;
-
---------------------------------------------------------------------------
-	COMPONENT idecode_rom is
-	Port 
-	(
-		nop			: in  std_logic;
-		inst_in		: in  word_t;
-		ctrl_out	: out ctrl_lines_t
-	);
-	END COMPONENT;
-
---------------------------------------------------------------------------
-	COMPONENT shifter is
-	Generic 
-	(
-		data_width : integer
-	);
-	Port 
-	(
-		shift_ctrl	: in  shift_ctrl_t;
-		din			: in  unsigned (data_width-1 downto 0);
-		dout		: out unsigned (data_width-1 downto 0)
-	);
-	END COMPONENT;
-	
---------------------------------------------------------------------------
-	COMPONENT alu is
-	Generic 
-	(
-		data_width : integer
-	);
-	Port 
-	(
-		op1_in		: in  unsigned (data_width-1 downto 0);
-		op2_in		: in  unsigned (data_width-1 downto 0);
-		op2_shifted	: in  unsigned (data_width-1 downto 0);
-		ctrl		: in  alu_ctrl_t;
-		result		: out unsigned (data_width-1 downto 0);
-		flags		: out alu_flags_t
-	);
-	END COMPONENT;
-
---------------------------------------------------------------------------
-	COMPONENT bcu is
-	Generic 
-	(
-		data_width : integer
-	);
-	Port 
-	(
-		op1_in		: in  unsigned (data_width-1 downto 0);
-		op2_in		: in  unsigned (data_width-1 downto 0);
-		flags		: out bcu_flags_t
-	);
-	END COMPONENT;
-	
---------------------------------------------------------------------------
-	COMPONENT cop is
-	Port 
-	(
-		rst			: in  STD_LOGIC;
-		clk			: in  STD_LOGIC;
-		ce			: in  STD_LOGIC;
-		IR_valid	: in  STD_LOGIC;
-		IR			: in  word_t;
-		events		: in  event_t;
-		ctrl_in		: in  cop_ctrl_in_t;
-		ctrl_out	: out cop_ctrl_out_t;
-		din			: in  word_t;
-		dout		: out word_t
-	);
-	END COMPONENT;
-	
---------------------------------------------------------------------------
-	COMPONENT muldiv is
-	Port 
-	(
-		rst			: in  std_logic;
-		clk			: in  std_logic;
-		hilo_we		: in  std_logic;
-		din_hi		: in  word_t;
-		din_lo		: in  word_t;
-		mul_divn	: in  std_logic;
-		start		: in  std_logic;
-		s_un		: in  std_logic;
-		hilo_sel	: in  std_logic;
-		busy		: out std_logic;
-		dout		: out word_t
-	);
-	END COMPONENT;
-
---------------------------------------------------------------------------
-	constant RESET_VECTOR	: word_t := X"BFC00000";
-
-	signal ID_stage			: ID_t;
-	signal EX_stage			: EX_t;
-	signal MEM_stage		: MEM_t;
-	signal WB_stage			: WB_t;
-	signal clk_2, clk_1		: STD_LOGIC;
-	signal hdu				: hdu_t;
-	signal cpu_rst			: STD_LOGIC;
-	signal reg_a			: word_t;
-	signal reg_b			: word_t;
-	signal ctrl_lines		: ctrl_lines_t;
-	signal ID_act			: STD_LOGIC;
-	signal EX_act			: STD_LOGIC;
-	signal MEM_act			: STD_LOGIC;
-	signal WB_act			: STD_LOGIC;
-	signal ID_nop			: STD_LOGIC;
-	signal EX_nop			: STD_LOGIC;
-	signal MEM_nop			: STD_LOGIC;
-	signal WB_nop			: STD_LOGIC;
-	signal IF_stall			: STD_LOGIC;
-	signal EX_stall			: STD_LOGIC;
-	signal MEM_stall		: STD_LOGIC;
-	signal WB_stall			: STD_LOGIC;
-	signal cpu_run			: STD_LOGIC;
-	signal branch_ce		: STD_LOGIC;
-	signal run_en			: STD_LOGIC;
-	signal mul_dep			: STD_LOGIC;
-	signal imem_dep			: STD_LOGIC;
-	signal dmem_dep			: STD_LOGIC;
-	signal cop_en			: STD_LOGIC;
-	signal cop_ctrl			: cop_ctrl_in_t;
-	signal cop_din			: word_t;
-	signal cop_dout			: word_t;
-	signal alu_result		: word_t;
-	signal mul_result		: word_t;
-	signal mul_busy			: STD_LOGIC;
-	signal events			: event_t;
-	signal bcu_op_a			: word_t;
-	signal bcu_op_b			: word_t;
-	signal bcu_flags		: bcu_flags_t;
-	
-	attribute ram_style : string;
-	
-	attribute ram_style of reg_a: signal is "distributed";
-	attribute ram_style of reg_b: signal is "distributed";
-
-	signal pc : pc_t;
-	
---------------------------------------------------------------------------
-begin
-	
-	clk_1					<= clk;
-	clk_2					<= not clk;
-	cpu_run					<= not halt and run_en;
-	
-	events.Int				<= int;
-	events.illegal			<= EX_stage.ctrl.exc_illegal;
-	events.break			<= EX_stage.ctrl.exc_break;
-	events.syscall			<= EX_stage.ctrl.exc_syscall;
-	
-	-- Stall Detection Unit ---------------------------------------------------
-	imem_en 				<= run_en and (not (ID_stage.cop_stat.exc_strobe or mul_dep) or ID_stage.cop_stat.ec) and not dmem_dep;
-
-	ID_nop					<= cpu_rst or imem_dep;
-	EX_nop					<= cpu_rst or EX_stage.cop_stat.exc_strobe or mul_dep;
-	MEM_nop					<= cpu_rst or EX_stage.cop_stat.exc_strobe;
-	WB_nop					<= cpu_rst or EX_stage.cop_stat.exc_strobe or dmem_dep;
-
-	IF_stall				<= not cpu_run or mul_dep or ID_stage.cop_stat.ec or imem_dep or dmem_dep;
-	EX_stall				<= not cpu_run or dmem_dep;
-	MEM_stall				<= not cpu_run or dmem_dep;
-	WB_stall				<= not cpu_run;
-
-	mul_dep					<= ID_stage.ctrl.mul_access and (EX_stage.ctrl.mul_start or mul_busy);
-	imem_dep				<= not imem_rdy;
-	dmem_dep				<= not dmem_rdy and MEM_stage.ctrl.dmem_en;
-	---------------------------------------------------------------------------
-	
-	events.inst_load_err	<= '1' when EX_stage.epc(1 downto 0) /= "00" else '0';
-	events.inst_priv_addr	<= EX_stage.epc(word_t'left);
-	
-	cop_en					<= not ID_nop;
-	
---------------------------------------------------------------------------
--- Muldiv
---------------------------------------------------------------------------
-inst_muldiv: muldiv
-	PORT MAP
-	(
-		rst			=> cpu_rst,
-		clk			=> clk,
-		hilo_we		=> EX_stage.ctrl.mul_hilo_we,
-		din_hi		=> EX_stage.reg_a,
-		din_lo		=> EX_stage.reg_b,
-		mul_divn	=> EX_stage.ctrl.mul_mul_divn,
-		start		=> EX_stage.ctrl.mul_start,
-		s_un		=> EX_stage.ctrl.mul_s_un,
-		hilo_sel	=> EX_stage.ctrl.mul_hilo_sel,
-		busy		=> mul_busy,
-		dout		=> mul_result
-	);
-
---------------------------------------------------------------------------
--- Coprocessor
---------------------------------------------------------------------------
-inst_cop: cop
-	PORT MAP
-	(
-		rst			=> cpu_rst,
-		clk			=> clk,
-		ce			=> cop_en,
-		events		=> events,
-		IR_valid	=> ID_stage.ctrl.cop_instr_en,
-		IR			=> ID_stage.IR,
-		ctrl_in		=> cop_ctrl,
-		ctrl_out	=> ID_stage.cop_stat,
-		dout		=> cop_dout,
-		din			=> cop_din
-	);
-
-	cop_ctrl.bd_ex		<= EX_stage.ctrl.branch;
-	cop_ctrl.bd_mem		<= MEM_stage.ctrl.branch;
-	cop_ctrl.bd_wb		<= WB_stage.ctrl.branch;
-	cop_ctrl.epc_id		<= ID_stage.epc;
-	cop_ctrl.epc_ex		<= EX_stage.epc;
-	cop_ctrl.epc_mem	<= MEM_stage.epc;
-	cop_ctrl.epc_wb		<= WB_stage.epc;
-	cop_ctrl.dmem_addr	<= EX_stage.va;
-	
---------------------------------------------------------------------------
--- IF stage
---------------------------------------------------------------------------
-	imem_addr		<= pc.curr;
-
-proc_stage_pc:
-	process(pc, rst, IF_stall)
-	begin
-		if rst = '1' then
-			pc.curr	<= RESET_VECTOR after 2 ns;
-		elsif IF_stall = '0' then
-			if pc.is_branch then
-				pc.curr	<= pc.pc_branch after 2 ns;
-			else
-				pc.curr	<= pc.nxt after 2 ns;
-			end if;	
-		end if;	
-	end process;
-
-proc_stage_pc_branch:
-	process(clk_1)
-	begin
-		if rising_edge(clk_1) then
-			if IF_stall = '0' then
-				pc.pc_branch	<= pc.curr + ID_stage.bimm18;
-			end if;	
-		end if;	
-	end process;
-
-proc_stage_pc_next:
-	process(clk_1)
-	begin
-		if rising_edge(clk_1) then
-			branch_ce	<= '0';
-			if rst = '1' then
-				pc.nxt	<= RESET_VECTOR;
-				pc.last	<= RESET_VECTOR;
-			elsif ID_stage.cop_stat.exc_strobe = '1' then
-				pc.nxt	<= ID_stage.cop_stat.exc_vec;
-			elsif IF_stall = '0' then
-				branch_ce	<= '1';
-				pc.last	<= pc.curr;
-				if ID_stage.ctrl.jump = '1' then
-					pc.nxt	<= ID_stage.jimm32;
-				elsif ID_stage.ctrl.jump_long = '1' then
-					pc.nxt	<= ID_stage.reg_a;
-				else
-					pc.nxt	<= pc.curr + 4;
-				end if;
-			end if;
-		end if;	
-	end process;
-
-proc_stage_branch:
-	process(clk_2)
-	begin
-		if rising_edge(clk_2) and branch_ce = '1' then
-			pc.is_branch	<= false;
-			if EX_stage.ctrl.branch = '1' then
-
-				case EX_stage.ctrl.bc_src is
-
-				when bc_eq_ne =>
-					if (EX_stage.ctrl.bc_not xor bcu_flags.eq) = '1' then
-						pc.is_branch <= true;
-					end if;
-
-				when bc_lez_gtz =>
-					if (EX_stage.ctrl.bc_not xor (bcu_flags.z or bcu_flags.ltz)) = '1' then
-						pc.is_branch <= true;
-					end if;
-
-				when bc_ltz_gez =>
-					if (EX_stage.ctrl.bc_not xor bcu_flags.ltz) = '1' then
-						pc.is_branch <= true;
-					end if;
-
-				when others => null;
-				end case;
-			end if;	
-		end if;	
-	end process;
-
-	process(rst, clk_1)
-	variable reset_delay : unsigned (5 downto 0);
-	begin
-		if rst = '1' then
-			reset_delay := (others => '1');
-			cpu_rst <= '1';
-			run_en	<= '0';
-		elsif rising_edge(clk_1) then
-			if reset_delay /= (5 downto 0 => '0') then
-				reset_delay := reset_delay - 1;
-			else
-				cpu_rst <= '0';
-			end if;	
-			if reset_delay(reset_delay'left) = '0' then
-				run_en	<= '1';
-			end if;	
-		end if;
-	end process;
-
---------------------------------------------------------------------------
--- ID stage
---------------------------------------------------------------------------
-	ID_act						<= not ID_nop;
-	ID_stage.IR					<= imem_data;
-	ID_stage.pcn				<= pc.curr;
-	ID_stage.op					<= decode_op(ID_stage.IR) when ID_nop = '0' else NOP;
-	ID_stage.jimm32				<= extract_jimm32(ID_stage.IR, ID_stage.pcn);
-	ID_stage.bimm18				<= extract_bimm18(ID_stage.IR, ID_stage.pcn);
-	ID_stage.shamt				<= extract_shamt(ID_stage.IR);
-	ID_stage.reg_a_rptr			<= extract_rs(ID_stage.IR);
-	ID_stage.reg_b_rptr			<= extract_rt(ID_stage.IR);
-	ID_stage.ctrl				<= ctrl_lines;
-	ID_stage.reg_write			<= ID_stage.ctrl.reg_write or ID_stage.cop_stat.reg_write;
-	ID_stage.epc				<= pc.last;
-	
-proc_stage_hdu:
-	process(ID_stage, EX_stage, MEM_stage, WB_stage)
-	variable read_a, read_b : boolean;
-	variable raw_a_EX, raw_a_MEM, raw_a_WB : boolean;
-	variable raw_b_EX, raw_b_MEM, raw_b_WB : boolean;
-	variable reg_ptr_a : reg_ptr_t;
-	variable reg_ptr_b : reg_ptr_t;
-	begin
-		
-		reg_ptr_a			:= ID_stage.reg_a_rptr;
-		reg_ptr_b			:= ID_stage.reg_b_rptr;
-		raw_a_EX			:= reg_ptr_a = EX_stage.reg_wptr and EX_stage.wreg_we = '1';
-		raw_a_MEM			:= reg_ptr_a = MEM_stage.reg_wptr and MEM_stage.wreg_we = '1';
-		raw_a_WB			:= reg_ptr_a = WB_stage.reg_wptr and WB_stage.wreg_we = '1';
-		raw_b_EX			:= reg_ptr_b = EX_stage.reg_wptr and EX_stage.wreg_we = '1';
-		raw_b_MEM			:= reg_ptr_b = MEM_stage.reg_wptr and MEM_stage.wreg_we = '1';
-		raw_b_WB			:= reg_ptr_b = WB_stage.reg_wptr and WB_stage.wreg_we = '1';
-
-		hdu.alu_fwd_a_ex	<= raw_a_EX after 1 ns;
-		hdu.alu_fwd_a_mem	<= raw_a_MEM after 1 ns;
-		hdu.alu_fwd_a_wb	<= raw_a_WB after 1 ns;
-		hdu.alu_fwd_b_ex	<= raw_b_EX after 1 ns;
-		hdu.alu_fwd_b_mem	<= raw_b_MEM after 1 ns;
-		hdu.alu_fwd_b_wb	<= raw_b_WB after 1 ns;
-
-	end process;
-	
-proc_stage_fwd_a:
-	process(reg_a, hdu, EX_stage, MEM_stage, WB_stage)
-	variable data : word_t;
-	begin
-		data		:= reg_a;
-		if hdu.alu_fwd_a_ex then
-			data	:= EX_stage.result;
-		elsif hdu.alu_fwd_a_mem then
-			data 	:= MEM_stage.data;
-		elsif hdu.alu_fwd_a_wb then
-			data 	:= WB_stage.data;
-		end if;
-		ID_stage.reg_a	<= data after 2 ns;
-	end process;
-
-proc_stage_fwd_b:
-	process(reg_b, hdu, EX_stage, MEM_stage, WB_stage)
-	variable data : word_t;
-	begin
-		data		:= reg_b;
-		if hdu.alu_fwd_b_ex then
-			data	:= EX_stage.result;
-		elsif hdu.alu_fwd_b_mem then
-			data	:= MEM_stage.data;
-		elsif hdu.alu_fwd_b_wb then
-			data	:= WB_stage.data;
-		end if;
-		ID_stage.reg_b	<= data after 2 ns;
-	end process;
-	
-proc_imm_mux:
-	process(ID_stage)
-	variable data : word_t;
-	begin
-		data := extract_uimm16(ID_stage.IR);
-
-		case ID_stage.ctrl.imm_src is
-
-		when src_imm32 =>
-			data := extract_simm32(ID_stage.IR);
-
-		when src_imm16 =>
-			data := extract_uimm16(ID_stage.IR);
-
-		when src_imm16_high =>
-			data := ID_stage.IR(word_t'length/2-1 downto 0) & (word_t'length/2-1 downto 0 => '0');
-			
-		when others => null;
-
-		end case;
-
-		ID_stage.imm <= data after 2 ns;
-
-	end process;
-
---------------------------------------------------------------------------
-inst_idecode_rom: idecode_rom
-	PORT MAP
-	(
-		nop			=> ID_nop,
-		inst_in		=> ID_stage.IR,
-		ctrl_out	=> ctrl_lines
-	);
-
-inst_reg_dual: reg_dual
-	GENERIC MAP
-	(
-		addr_width	=> reg_ptr_t'length,
-		data_width	=> word_t'length
-	)
-	PORT MAP
-	(
-		clk_w		=> clk_1,
-		we			=> WB_stage.wreg_we,
-		en			=> '1',
-		wptr		=> WB_stage.reg_wptr,
-		din			=> WB_stage.data,
-		rptr_a		=> ID_stage.reg_a_rptr,
-		rptr_b		=> ID_stage.reg_b_rptr,
-		dout_a		=> reg_a,
-		dout_b		=> reg_b
-	);
-
---------------------------------------------------------------------------
--- EX stage
---------------------------------------------------------------------------
-	EX_stage.reg_a_rptr		<= extract_rs(EX_stage.IR);
-	EX_stage.reg_b_rptr		<= extract_rt(EX_stage.IR);
-	EX_stage.result			<= mul_result when EX_stage.ctrl.mul_access = '1' else alu_result;
-	EX_act					<= not (EX_nop or EX_stall);
-	
-proc_stage_ID_EX_1:
-	process(clk_1)
-	begin
-		if rising_edge(clk_1) then
-			if cpu_rst = '1' then
-				EX_stage.epc			<= (others => '0');
-			elsif EX_stall = '0' then
-				EX_stage.op				<= ID_stage.op;
-				if ID_nop = '0' then
-					EX_stage.IR			<= ID_stage.IR;
-				else
-					EX_stage.IR			<= (others => '0');
-				end if;
-				EX_stage.ctrl			<= ID_stage.ctrl;
-				EX_stage.reg_write		<= ID_stage.reg_write;
-				EX_stage.pcn			<= ID_stage.pcn;
-				EX_stage.epc			<= ID_stage.epc;
-				EX_stage.cop_stat		<= ID_stage.cop_stat;
-				if EX_nop = '1' then
-					EX_stage.op						<= NOP;
-					EX_stage.IR						<= (others => '0');
-					EX_stage.ctrl					<= ctrl_lines_default;
-					EX_stage.cop_stat.exc_strobe	<= '0';
-					EX_stage.reg_write				<= '0';
-				end if;
-			end if;	
-		end if;
-	end process;
-
-proc_stage_EX_except:
-	process(EX_stage)
-	begin
-		events.data_load_err	<= '0';
-		events.data_store_err	<= '0';
-		events.alu_ovf			<= '0';
-		events.alu_uvf			<= '0';
-		if EX_stage.ctrl.alu_exc_en = '1' then
-			if EX_stage.alu_flags.ovf = '1' then
-				events.alu_ovf	<= '1';
-			end if;	
-			if EX_stage.alu_flags.uvf = '1' then
-				events.alu_uvf	<= '1';
-			end if;	
-		end if;	
-		if EX_stage.ctrl.except_en = '1' then
-			if EX_stage.ctrl.word2_en = '1' then
-				if EX_stage.va(0) = '1' then
-					events.data_load_err	<= EX_stage.ctrl.dmem_en and not EX_stage.ctrl.dmem_we;
-					events.data_store_err	<= EX_stage.ctrl.dmem_en and EX_stage.ctrl.dmem_we;
-				end if;
-			elsif EX_stage.va(1 downto 0) /= "00" then
-				events.data_load_err	<= EX_stage.ctrl.dmem_en and not EX_stage.ctrl.dmem_we;
-				events.data_store_err	<= EX_stage.ctrl.dmem_en and EX_stage.ctrl.dmem_we;
-			end if;	
-		end if;
-	end process;
-	
-proc_stage_DMEM_ADDR:
-	process(clk_1)
-	variable vaddr : word_t;
-	begin
-		if rising_edge(clk_1) and EX_act = '1' then
-			vaddr			:= ID_stage.reg_a + extract_simm32(ID_stage.IR);
-			EX_stage.va		<= vaddr;
-			if ID_stage.cop_stat.RE = '1' then
-				EX_stage.pa_off	<= not vaddr(1 downto 0);
-			else	
-				EX_stage.pa_off	<= vaddr(1 downto 0);
-			end if;
-		end if;
-	end process;
-	dmem_we		<= store_be(EX_stage.pa_off, EX_stage.ctrl.dmem_we, EX_stage.ctrl.word2_en, EX_stage.ctrl.word4_en, EX_stage.ctrl.align_left, EX_stage.ctrl.byte_en_byp) after 1 ns;
-	dmem_re		<= not EX_stage.ctrl.dmem_we;
-	dmem_en		<= EX_stage.ctrl.dmem_en and not(ID_stage.cop_stat.exc_strobe) after 1 ns;
-	dmem_dout	<= store_shift(EX_stage.reg_b, EX_stage.pa_off, EX_stage.ctrl.shift_offset, EX_stage.ctrl.shift_byp) after 1ns;
-	dmem_addr	<= EX_stage.va;
-	cop_din		<= EX_stage.reg_b;
-	
---------------------------------------------------------------------------
-proc_wptr_mux:
-	process(EX_stage)
-	variable opclass : opcode_t;
-	variable reg_wptr : reg_ptr_t;
-	begin
-	
-		opclass := extract_opc(EX_stage.IR);
-		case opclass is
-		when "000000" =>
-			reg_wptr					:= extract_rd(EX_stage.IR);
-		when others =>
-			reg_wptr					:= extract_rt(EX_stage.IR);
-		end case;
-		
-		EX_stage.wreg_we <= EX_stage.reg_write after 1 ns;
-		if reg_wptr = "00000" then
-			EX_stage.wreg_we <= '0' after 1 ns;
-		end if;	
-
-		EX_stage.reg_wptr	<= reg_wptr after 1 ns;
-		case EX_stage.ctrl.wptr_srcsel is
-			when wptr_src_imm =>
-				EX_stage.reg_wptr	<= reg_wptr after 1 ns;
-
-			when wptr_src_const =>
-				EX_stage.reg_wptr	<= to_unsigned(31, reg_ptr_t'length) after 1 ns;
-				EX_stage.wreg_we <= '1' after 1 ns;
-
-			when others => null;
-		end case;
-
-	end process;
-
---------------------------------------------------------------------------
-proc_stage_fwd_reg_a:
-	process(clk_1)
-	begin
-		if rising_edge(clk_1) then
-			if EX_act = '1' then
-				EX_stage.reg_a	<= ID_stage.reg_a;
-				bcu_op_a		<= ID_stage.reg_a;
-			end if;
-		end if;
-	end process;
-
-proc_stage_fwd_reg_b:
-	process(clk_1)
-	begin
-		if rising_edge(clk_1) then
-			if EX_act = '1' then
-				EX_stage.reg_b	<= ID_stage.reg_b;
-				bcu_op_b		<= ID_stage.reg_b;
-			end if;
-		end if;
-	end process;
-
-alu_op1_mux:
-	process(EX_stage)
-	variable data : word_t;
-	begin
-	
-		data := EX_stage.reg_a;
-
---		case EX_stage.ctrl.alu.op1_src is
---
---		when alu_src_reg =>
---			data := EX_stage.reg_a;
---
---		when alu_src_muldiv =>
---			data := mul_result;
---
---		when others => null;
---
---		end case;
-
-		EX_stage.alu_op1 <= data;
-
-	end process;
-
-alu_op2_mux:
-	process(clk_1)
-	variable data : word_t;
-	begin
-
-		if rising_edge(clk_1) and EX_act = '1' then
-			data := ID_stage.reg_b;
-
-			case ID_stage.ctrl.alu.op2_src is
-
-			when alu_src_reg =>
-				data := ID_stage.reg_b;
-
-			when alu_src_imm =>
-				data := ID_stage.imm;
-
-			when others => null;
-
-			end case;
-
-			EX_stage.alu_op2 <= data;
-		end if;
-
-	end process;
-
-shifter_sa_mux:
-	process(clk_1)
-	variable data 		: shamt_t;
-	variable data_inv 	: shamt_t;
-
-	begin
-		if rising_edge(clk_1) and EX_act = '1' then
-			data 		:= ID_stage.reg_a(4 downto 0);
-			case ID_stage.ctrl.shamt2_srcsel is
-
-				when sa_src_reg =>
-					data := ID_stage.reg_a(4 downto 0);
-
-				when sa_src_imm =>
-					data := ID_stage.shamt;
-
-				when others => null;
-
-			end case;
-			data_inv := not data + 1;
-			if ID_stage.ctrl.alu.shift_right = '0' then
-				EX_stage.shift_ctrl.shamt_rnd	<= data_inv after 2 ns;
-			else	
-				EX_stage.shift_ctrl.shamt_rnd	<= data after 2 ns;
-			end if;
-			EX_stage.shift_ctrl.shamt_nrm	<= data after 1 ns;
-			EX_stage.shift_ctrl.shift_right	<= ID_stage.ctrl.alu.shift_right;
-			EX_stage.shift_ctrl.shift_arith	<= ID_stage.ctrl.alu.shift_arith;
-		end if;
-		
-	end process;
-
---------------------------------------------------------------------------
-inst_shifter: shifter
-	GENERIC MAP
-	(
-		data_width	=> word_t'length
-	)
-	PORT MAP
-	(
-		shift_ctrl	=> EX_stage.shift_ctrl,
-		din			=> EX_stage.reg_b,
-		dout		=> EX_stage.alu_op2_s
-	);
-
-inst_alu: alu
-	GENERIC MAP
-	(
-		data_width	=> word_t'length
-	)
-	PORT MAP
-	(
-		op1_in			=> EX_stage.alu_op1,
-		op2_in			=> EX_stage.alu_op2,
-		op2_shifted		=> EX_stage.alu_op2_s,
-		ctrl			=> EX_stage.ctrl.alu,
-		result			=> alu_result,
-		flags			=> EX_stage.alu_flags
-	);
-
-inst_bcu: bcu
-	GENERIC MAP
-	(
-		data_width	=> word_t'length
-	)
-	PORT MAP
-	(
-		op1_in		=> bcu_op_a,
-		op2_in		=> bcu_op_b,
-		flags		=> bcu_flags
-	);
-
---------------------------------------------------------------------------
--- MEM stage
---------------------------------------------------------------------------
-	MEM_act					<= not (MEM_nop or MEM_stall);
-
-proc_stage_MEM_n:
-	process(clk_1)
-	begin
-		if rising_edge(clk_1) then
-			if MEM_stall = '0' then
-				MEM_stage.op				<= EX_stage.op;
-				MEM_stage.wreg_we		<= EX_stage.wreg_we;
-				MEM_stage.ctrl			<= EX_stage.ctrl;
-				MEM_stage.pcn			<= EX_stage.pcn;
-				MEM_stage.epc			<= EX_stage.epc;
-				MEM_stage.pa_off		<= EX_stage.pa_off;
-				MEM_stage.reg_wptr		<= EX_stage.reg_wptr;
-				MEM_stage.cop_stat		<= EX_stage.cop_stat;
-				if EX_stage.ctrl.dmem_en = '1' then
-					MEM_stage.ex_result		<= EX_stage.reg_b;
-				else
-					MEM_stage.ex_result		<= EX_stage.result;
-				end if;	
-				if MEM_nop = '1' then
-					MEM_stage.op		<= NOP;
-					MEM_stage.wreg_we	<= '0';
-					MEM_stage.ctrl		<= ctrl_lines_default;
-	--				MEM_stage.epc		<= (others => '0');
-	--				MEM_stage.pcn		<= (others => '0');
-	--				MEM_stage.pa_off	<= (others => '0');
-	--				MEM_stage.reg_wptr	<= (others => '0');
-	--				MEM_stage.ex_result	<= (others => '0');
-				end if;
-			end if;	
-		end if;
-	end process;
-
-proc_stage_MEM_mux:
-	process(MEM_stage, dmem_din, cop_dout)
-	variable temp1 : word_t;
-	variable temp2 : word_t;
-	variable data : word_t;
-	variable be : unsigned(3 downto 0);
-	begin
-		data	:= MEM_stage.ex_result;
-		be		:= load_be(MEM_stage.pa_off, MEM_stage.ctrl.align_left, MEM_stage.ctrl.byte_en_byp);
-		if MEM_stage.cop_stat.cop_access = '1' then
-			data		:= cop_dout;
-		elsif MEM_stage.ctrl.reg_link = '1' then
-			data		:= MEM_stage.pcn + 4;
-		elsif MEM_stage.ctrl.dmem_en = '1' then
-			temp1		:= load_shift(dmem_din,  MEM_stage.pa_off, MEM_stage.ctrl.shift_offset, MEM_stage.ctrl.shift_byp);
-			temp2		:= load_sign_ext(temp1, MEM_stage.ctrl.sign_ext_byp, MEM_stage.ctrl.load_signed, MEM_stage.ctrl.word2_en, MEM_stage.ctrl.word4_en);
-			if be(0) = '1' then
-				data(7 downto 0)	:= temp2(7 downto 0);
-			end if;	
-			if be(1) = '1' then
-				data(15 downto 8)	:= temp2(15 downto 8);
-			end if;	
-			if be(2) = '1' then
-				data(23 downto 16)	:= temp2(23 downto 16);
-			end if;	
-			if be(3) = '1' then
-				data(31 downto 24)	:= temp2(31 downto 24);
-			end if;	
-		end if;
-		MEM_stage.data				<= data after 1 ns;
-		
-	end process;
-
---------------------------------------------------------------------------
--- WB stage
---------------------------------------------------------------------------
-	WB_act					<= not (WB_nop or WB_stall);
-
-proc_stage_WB_p:
-	process(clk_1)
-	begin
-		if rising_edge(clk_1) then
-			if WB_stall = '0' then
-				WB_stage.op				<= MEM_stage.op;
-				WB_stage.ctrl			<= MEM_stage.ctrl;
-				WB_stage.wreg_we		<= MEM_stage.wreg_we;
-				WB_stage.reg_wptr		<= MEM_stage.reg_wptr;
-				WB_stage.data			<= MEM_stage.data;
-				WB_stage.epc			<= MEM_stage.epc;
-				if WB_nop = '1' then
-					WB_stage.op				<= NOP;
-					WB_stage.ctrl			<= ctrl_lines_default;
-					WB_stage.wreg_we		<= '0';
-	--				WB_stage.epc			<= (others => '0');
-	--				WB_stage.reg_wptr		<= (others => '0');
-	--				WB_stage.data			<= (others => '0');
-				end if;	
-			end if;	
-		end if;	
-	end process;
-
---------------------------------------------------------------------------
-end Behavioral;

projects/mips_sys/src/mips_sys.vhd

@@ -1,681 +0,0 @@
--------------------------------------------------------------------------
--- Project: JCPU, a portable 8-bit RISC CPU written in VHDL
--- This file: system test using Xilinx ML-402
-
--- Copyright (C) 2007 J. Ahrensfeld
-
--- This library is free software; you can redistribute it and/or
--- modify it under the terms of the GNU Lesser General Public
--- License as published by the Free Software Foundation; either
--- version 2.1 of the License, or (at your option) any later version.
-
--- This library is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
--- Lesser General Public License for more details.
-
--- You should have received a copy of the GNU Lesser General Public
--- License along with this library; if not, write to the Free Software
--- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
-
--- For questions and ideas, please contact the author at jens@jayfield.org
-
------------------------------------------------------------------------
-
-LIBRARY ieee;
-use IEEE.STD_LOGIC_1164.ALL;
-USE ieee.numeric_std.ALL;
-use std.textio.all; --  Imports the standard textio package.
-
-Library UNISIM;
-use UNISIM.vcomponents.all;
-
-library work;
-use work.mips_types.all;
---use work.fifo_ctrl_pkg.all;
-use work.sdram_config.all;
-use work.sdram_types.all;
-
-ENTITY mips_sys IS
-GENERIC
-(
-	sys_freq			: integer		    := 100E6;
-	ddr_phaseshift		: integer			:= 0;
-	ddr_frequency_hz	: integer			:= 100E6
-);
-PORT
-(
-	sys_rst_n_in		: in std_logic;
-	sys_clk_in			: in std_logic;
-
-	-- Buttons and LEDs
-	sys_btn				: in unsigned(4 downto 0);
-	sys_dip				: in unsigned(7 downto 0);
-	sys_led				: out unsigned(8 downto 0);
-
-	-- UART
-	sys_rx				: in std_logic;
-	sys_tx				: out std_logic;
-
-	-- LCD
-	sys_lcd_d			: inout unsigned(3 downto 0);
-	sys_lcd_e			: out std_logic;
-	sys_lcd_rs			: out std_logic;
-	sys_lcd_rw			: out std_logic;
-
-	-- DDR SDRAM
-	sys_sdr_clk_p		: out std_logic;    -- ddr_sdram_clock
-	sys_sdr_clk_n		: out std_logic;    -- /ddr_sdram_clock
-	sys_sdr_cke_q		: out std_logic;    -- clock enable
-	sys_sdr_cs_qn		: out std_logic;    -- /chip select
-	sys_sdr_ras_qn		: out std_logic;    -- /ras
-	sys_sdr_cas_qn		: out std_logic;    -- /cas
-	sys_sdr_we_qn		: out std_logic;    -- /write enable
-	sys_sdr_dm_q		: out unsigned(DDR_DM_WIDTH-1 downto 0);     -- data mask bits, set to "00"
-	sys_sdr_dqs_q		: inout unsigned(DDR_DQS_WIDTH-1 downto 0);    -- data strobe, only for write
-	sys_sdr_ba_q		: out unsigned(DDR_BANK_WIDTH-1 downto 0);   -- bank select
-	sys_sdr_a_q			: out unsigned(DDR_ADDR_WIDTH-1 downto 0);   -- address bus 
-	sys_sdr_data		: inout unsigned(DDR_DATA_WIDTH-1 downto 0); -- bidir data bus
-	sys_sdr_clk_fb		: in std_logic;
-	
-	-- VGA
---	sys_vga_red			: out unsigned(7 downto 0);
---	sys_vga_green		: out unsigned(7 downto 0);
---	sys_vga_blue		: out unsigned(7 downto 0);
---	sys_vga_blank_n		: out std_logic;
---	sys_vga_sync_n		: out std_logic;
---	sys_vga_hsync		: out std_logic;
---	sys_vga_vsync		: out std_logic;
---	sys_vga_clk			: out std_logic;
-
-	sys_error			: out unsigned(1 downto 0) -- indicates Errors
-	
-);
---	attribute BUFFER_TYPE : string;
---	attribute BUFFER_TYPE of sys_clk_in			: signal is "BUFG";
---	attribute BUFFER_TYPE of sys_sdr_dcm_clk_fb	: signal is "BUFG";
-
-END mips_sys;
-
-ARCHITECTURE behavior OF mips_sys IS 
-
-	COMPONENT mips_top
-	Port 
-	(
-		rst			: in  STD_LOGIC;
-		clk			: in  STD_LOGIC;
-		int			: in  unsigned(5 downto 0);
-		mem_valid	: in  STD_LOGIC;
-		mem_rdy		: in  STD_LOGIC;
-		mem_re		: out STD_LOGIC;
-		mem_en		: out STD_LOGIC;
-		mem_we		: out unsigned(3 downto 0);
-		mem_din		: in  word_t;
-		mem_dout	: out word_t;
-		mem_addr	: out word_t
-		
-	);
-	END COMPONENT;
-	signal int	 		: unsigned(5 downto 0);
-	signal mem_din		: word_t;
-	signal mem_dout 	: word_t;
-	signal mem_addr 	: word_t;
-	signal mem_re 		: std_logic;
-	signal mem_en 		: std_logic;
-	signal mem_we 		: unsigned(3 downto 0);
-	signal mem_valid	: std_logic;
-	signal mem_rdy		: std_logic;
-	
-	COMPONENT rom
-	Port 
-	(
-		clk			: in  STD_LOGIC;
-		ce			: in  STD_LOGIC;
-		addr		: in  word_t;
-		dout		: out word_t
-	);
-	END COMPONENT;
-	signal rom_data			: word_t;
-
-	COMPONENT ram
-		PORT 
-		(
-			clk			: in  STD_LOGIC;
-			ce			: in  STD_LOGIC;
-			we			: in  unsigned(3 downto 0);
-			addr		: in  unsigned(31 downto 0);
-			din			: in  unsigned(31 downto 0);
-			dout		: out unsigned(31 downto 0)
-		);
-	END COMPONENT;
-	signal ram_data			: word_t;
-
-	COMPONENT lcd_port
-	PORT (
-			rst			: in std_logic;
-			clk			: in std_logic;
-			we			: in std_logic;
-			din			: in unsigned(7 downto 0);
-			dout		: out unsigned(7 downto 0);
-			lcd_d		: inout unsigned(3 downto 0);
-			lcd_e		: out std_logic;
-			lcd_rs		: out std_logic;
-			lcd_rw		: out std_logic
-		);
-	END COMPONENT;
-
-	COMPONENT uart_tx
-    Port
-    (
-		data_in				: in std_logic_vector(7 downto 0);
-		write_buffer		: in std_logic;
-		reset_buffer		: in std_logic;
-		en_16_x_baud		: in std_logic;
-		serial_out			: out std_logic;
-		buffer_full			: out std_logic;
-		buffer_half_full	: out std_logic;
-		clk					: in std_logic
-	);
-	END COMPONENT;
-
-	COMPONENT uart_rx
-	Port 
-	(
-		serial_in			: in std_logic;
-		data_out			: out std_logic_vector(7 downto 0);
-		read_buffer			: in std_logic;
-		reset_buffer		: in std_logic;
-		en_16_x_baud		: in std_logic;
-		buffer_data_present	: out std_logic;
-		buffer_full			: out std_logic;
-		buffer_half_full	: out std_logic;
-		clk					: in std_logic
-	);
-	END COMPONENT;
-
-	signal rst : std_logic;
-	signal rst_in : std_logic;
-	signal started_up : std_logic := '1';
-	signal clk : std_logic;
-
-
-	signal led_reg : unsigned(7 downto 0);
-	signal cpu_lcd_out_reg, cpu_lcd_in_reg, reg_uart_tx: unsigned(7 downto 0);
-	signal cpu_lcd_we : std_logic;
-	signal err_led_reg		: unsigned(1 downto 0);
-	signal btn_ps2_reg : unsigned(7 downto 0);
-	
-	-- Signals to form an timer generating an interrupt every microsecond
-	subtype tick_usec_t	is natural range 0 to 99;
-	signal tick_usec		: tick_usec_t;
-	signal cnt_usec			: word_t;
-	signal cnt_sec			: word_t;
-	signal cnt_usec_preset	: word_t;
-	signal cnt_sec_preset	: word_t;
-	signal cnt_usec_en		: std_logic;
-	signal cnt_usec_we		: std_logic;
-	signal cnt_sec_en		: std_logic;
-	signal cnt_sec_we		: std_logic;
-	
-	-- Signals for UART connections
-	signal baud_count		: unsigned(7 downto 0);
-	signal en_16_x_baud		: std_logic;
-	signal reg_we_uart_tx	: std_logic;
-	signal tx_full			: std_logic;
-	signal tx_half_full		: std_logic;
-	signal reg_re_uart_rx	: std_logic;
-	signal reg_uart_rx		: std_logic_vector(7 downto 0);
-	signal rx_data_present	: std_logic;
-	signal rx_full			: std_logic;
-	signal rx_half_full		: std_logic;
-	signal uart_status_port	: unsigned(7 downto 0);
-	signal reg_uart_ctrl	: unsigned(7 downto 0);
-	signal reg_uart_baud	: unsigned(7 downto 0);
-
-	-- DDR SDRAM
-	constant BURST_LEN		: natural := 2;
-
-	signal sdr_addr           : user_addr_t;
-	signal sdr_busy_q         : std_logic;
-	signal sdr_udata_in        : unsigned(SDR_DATA_WIDTH-1 downto 0);
-	signal sdr_udata_out_q     : unsigned(SDR_DATA_WIDTH-1 downto 0);
-	signal sdr_udata_vld_q     	: std_logic;
-	signal sdr_be      		 : unsigned(SDR_DM_WIDTH-1 downto 0) := "00000000";
-	signal sdr_read         : std_logic;
-	signal sdr_en         : std_logic;
-	
-	signal reg_data			: word_t;
-	signal reg_data_vld		: std_logic;
-	signal reg_en			: std_logic;
-	signal rom_en			: std_logic;
-	signal rom_data_vld		: std_logic;
-	signal ram_en			: std_logic;
-	signal ram_data_vld		: std_logic;
-	signal sdram_en			: std_logic;
-	signal sd_counter		: word_t;
-	signal mem_re_r			: std_logic;
-	signal mem_we_r			: unsigned(3 downto 0);
-	signal mem_dout_r		: word_t;
-	signal mem_addr_r		: word_t;
-	
---	attribute rom_style: string;
---	attribute rom_style of cmd_fifo_dout: signal is "DISTRIBUTED";
---	attribute rom_style of cpu_cpu_write_fifo_dout: signal is "DISTRIBUTED";
---	attribute rom_style of cpu_read_fifo_dout: signal is "DISTRIBUTED";
-
-BEGIN
-
-	int 				<= "0000" & rx_data_present & btn_ps2_reg(4);
-	rst_in 				<= not (started_up and sys_rst_n_in);
-	
-en_mux:
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			if rst = '1' then
-				sdram_en	<= '0';
-			else	
-				reg_en		<= '0';
-				rom_en		<= '0';
-				ram_en		<= '0';
---				sdram_en	<= '0';
-
-				if mem_en = '1' then
-					mem_re_r		<= mem_re;
-					mem_we_r		<= mem_we;
-					mem_dout_r		<= mem_dout;
-					mem_addr_r		<= mem_addr;
-					if mem_addr(31 downto 28) = X"A" then
-						reg_en		<= '1';
-					elsif (mem_addr(31 downto 28) = X"B" and mem_addr(15) = '0') then
-						rom_en		<= '1';
-					elsif (mem_addr(31 downto 28) = X"B" and mem_addr(15) = '1') then
-						ram_en		<= '1';
-					elsif (mem_addr(31 downto 28) = X"8" or mem_addr(30) = '1') then
-						sdram_en	<= '1';
-					end if;
-				elsif sdr_busy_q = '0' then
-					sdram_en	<= '0';
-				end if;	
-			end if;
-		end if;
-	end process;	
-	
-	sdr_addr			<= mem_addr_r(24 downto 2) & "0";
-	sdr_udata_in		<= mem_dout_r & mem_dout_r;
-	sdr_be				<= mem_we_r & mem_we_r;
-	
-	sdr_read			<= '1';
-	sdr_en		 		<= sdram_en and not sdr_busy_q;
-		
-------------------------------------------------------------------
-led_out:
-	process(rst, clk)
-	begin
-		if rst = '1' then
-			sys_led		<= (others => '0');
-			sys_error	<= (others => '0');
-		elsif rising_edge(clk) then
-			sys_led		<= not mem_rdy & led_reg;
-			sys_error	<= err_led_reg;
-		end if;
-	end process;	
-		
-------------------------------------------------------------------
-btn_ps2_register:
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			btn_ps2_reg		<= "000" & unsigned(sys_btn);
-		end if;
-	end process;	
-		
-proc_sd_counter:
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			if rst = '1' then
-				sd_counter	<= (others => '0');
-			elsif sdr_udata_vld_q = '1' then
-				sd_counter	<= sd_counter + 1;
-			end if;
-		end if;
-	end process;	
-
-	mem_valid	<= sdr_udata_vld_q or reg_data_vld or rom_data_vld or ram_data_vld;
-	mem_din		<=	reg_data when reg_data_vld = '1' else
-					rom_data when rom_data_vld = '1' else
-					ram_data when ram_data_vld = '1' else
-					sdr_udata_out_q(mem_din'left downto mem_din'right);
-					
-------------------------------------------------------------------
-inst_rom: rom
-	PORT MAP
-	(
-		clk			=> clk,
-		ce			=> rom_en,
-		addr		=> mem_addr_r,
-		dout 		=> rom_data
-	);
-
-inst_ram: ram
-	PORT MAP 
-	(
-		clk		=> clk,
-		ce		=> ram_en,
-		we		=> mem_we_r,
-		addr	=> mem_addr_r,
-		din		=> mem_dout_r,
-		dout	=> ram_data
-	);
-	
-	
-ram_read: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			ram_data_vld		<= '0';
-			if ram_en = '1' and mem_re_r = '1' then
-				ram_data_vld	<= '1';
-			end if;
-		end if;	
-	end process;
-
-rom_read: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			rom_data_vld		<= '0';
-			if rom_en = '1' and mem_re_r = '1' then
-				rom_data_vld	<= '1';
-			end if;
-		end if;	
-	end process;
-
-registers_read: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			reg_data_vld		<= '0';
-			reg_re_uart_rx	<= '0';
-			if reg_en = '1' and mem_re_r = '1' then
-				reg_data_vld		<= '1';
-				reg_data			<= (others => '0');
-				case mem_addr_r(5 downto 2) is
-
-				when "0000" => null;
-
-				when "0001" =>
-					reg_re_uart_rx			<= mem_re_r;
-					reg_data(7 downto 0)	<= unsigned(reg_uart_rx);
-
-				when "0010" =>
-					reg_data(7 downto 0)	<= uart_status_port;
-					reg_data(15 downto 8)	<= reg_uart_baud;
-					reg_data(23 downto 16)	<= btn_ps2_reg;
-					reg_data(31 downto 24)	<= cpu_lcd_in_reg;
-
-				when "0100" =>
-					reg_data				<= cnt_usec;
-
-				when "0101" =>
-					reg_data				<= cnt_sec;
-
-				when others => null;
-				end case;
-			end if;
-		end if;	
-	end process;
-
-------------------------------------------------------------------
-registers_write: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			cpu_lcd_we		<= '0';
-			reg_we_uart_tx	<= '0';
-			cnt_usec_we		<= '0';
-			cnt_sec_we		<= '0';
-			if rst = '1' then
-				led_reg			<= (others => '0');
-				err_led_reg		<= (others => '0');
-				cpu_lcd_out_reg	<= (others => '0');
-				reg_uart_baud	<= to_unsigned(53, 8);
-				reg_uart_ctrl	<= to_unsigned(0, 8);
-			elsif reg_en = '1' then
-				case mem_addr_r(5 downto 2) is
-				
-				when "0000" =>
-					if mem_we_r(0) = '1' then
-						led_reg(7 downto 0) <= mem_dout_r(7 downto 0);
-					end if;	
-					if mem_we_r(3) = '1' then
-						err_led_reg			<= mem_dout_r(31 downto 30);
-					end if;	
-					
-				when "0001" =>
-					if mem_we_r(0) = '1' then
-						reg_we_uart_tx	<= '1';
-						reg_uart_tx <= mem_dout_r(7 downto 0);
-					end if;	
-					
-				when "0010" =>
-					if mem_we_r(0) = '1' then
-						reg_uart_ctrl	<= mem_dout_r(7 downto 0);
-					end if;	
-					if mem_we_r(1) = '1' then
-						reg_uart_baud	<= mem_dout_r(15 downto 8);
-					end if;	
-					if mem_we_r(3) = '1' then
-						cpu_lcd_we		<= '1';
-						cpu_lcd_out_reg	<= mem_dout_r(31 downto 24);
-					end if;	
-
-				when "0100" =>
-					if mem_we_r(3) = '1' then
-						cnt_usec_we		<= '1';
-						cnt_usec_preset	<= mem_dout_r;
-					end if;	
-
-				when "0101" =>
-					if mem_we_r(3) = '1' then
-						cnt_sec_we		<= '1';
-						cnt_sec_preset	<= mem_dout_r;
-					end if;	
-
-				when others => null;
-				end case;
-			end if;	
-		end if;	
-	end process;
-	
-------------------------------------------------------------------
-	mem_rdy				<= not sdr_busy_q;
-
-------------------------------------------------------------------
-inst_mips_top: mips_top
-	PORT MAP
-	(
-		rst				=> rst,
-		clk				=> clk,
-		int				=> int,
-		mem_valid		=> mem_valid,
-		mem_rdy			=> mem_rdy,
-		mem_en			=> mem_en,
-		mem_re			=> mem_re,
-		mem_we			=> mem_we,
-		mem_din			=> mem_din,
-		mem_dout		=> mem_dout,
-		mem_addr		=> mem_addr
-	);
-
-inst_lcd_port: lcd_port
-	PORT MAP
-	(
-		rst => rst,
-		clk => clk,
-		we => cpu_lcd_we,
-		din => cpu_lcd_out_reg,
-		dout => cpu_lcd_in_reg,
-		lcd_d => sys_lcd_d,
-		lcd_e => sys_lcd_e,
-		lcd_rs => sys_lcd_rs,
-		lcd_rw => sys_lcd_rw
-	);
-	
-inst_uart_tx: uart_tx 
-	port map
-	(
-		data_in				=> std_logic_vector(reg_uart_tx), 
-		write_buffer		=> reg_we_uart_tx,
-		reset_buffer		=> rst,
-		en_16_x_baud		=> en_16_x_baud,
-		serial_out			=> sys_tx,
-		buffer_full			=> tx_full,
-		buffer_half_full	=> tx_half_full,
-		clk					=> clk
-	);
-	
-inst_uart_rx: uart_rx
-	port map
-	(
-		serial_in			=> sys_rx,
-		data_out			=> reg_uart_rx,
-		read_buffer			=> reg_re_uart_rx,
-		reset_buffer		=> rst,
-		en_16_x_baud		=> en_16_x_baud,
-		buffer_data_present => rx_data_present,
-		buffer_full			=> rx_full,
-		buffer_half_full	=> rx_half_full,
-		clk					=> clk
-	);  
-
-	uart_status_port <= (7 downto 5 => '0') & rx_data_present & rx_full & rx_half_full & tx_full & tx_half_full;
-
-tick_usec_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			cnt_usec_en		<= '0';
-			if rst = '1' then
-				tick_usec	<= 0;
-				cnt_usec_en	<= '0';
-			elsif tick_usec = tick_usec_t'high then
-				tick_usec		<= 0;
-				cnt_usec_en		<= '1';
-			else
-				tick_usec		<= tick_usec + 1;
-			end if;
-		end if;
-	end process;
-
-cnt_usec_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			cnt_sec_en		<= '0';
-			if rst = '1' then
-				cnt_usec	<= (others => '0');
-				cnt_sec_en	<= '0';
-			elsif cnt_usec_we = '1' then
-				cnt_usec		<= cnt_usec_preset;
-			elsif cnt_usec_en = '1' then
-				if cnt_usec = to_unsigned(1E6 - 1, word_t'length) then
-					cnt_usec		<= (others => '0');
-					cnt_sec_en		<= '1';
-				else
-					cnt_usec		<= cnt_usec + 1;
-				end if;
-			end if;	
-		end if;
-	end process;
-
-cnt_sec_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			if rst = '1' then
-				cnt_sec		<= (others => '0');
-			elsif cnt_sec_we = '1' then
-				cnt_sec		<= cnt_sec_preset;
-			elsif cnt_sec_en = '1' then
-				cnt_sec		<= cnt_sec + 1;
-			end if;	
-		end if;
-	end process;
-
-baud_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			if rst = '1' then
-				baud_count <= (others => '0');
-			elsif baud_count = reg_uart_baud then
-				baud_count <= (others => '0');
-				en_16_x_baud <= '1';
-			else
-				baud_count <= baud_count + 1;
-				en_16_x_baud <= '0';
-			end if;
-		end if;
-	end process;
-
-	-- DDR SDRAM Controller Core
-	inst_sdram_ctrl_frontend : entity work.sdram_ctrl_frontend
-	Generic map
-	(
-		BL 				=> BURST_LEN,
-		read_phaseshift => ddr_phaseshift,
-		f_sysclk 		=> ddr_frequency_hz,
-		fifo_depth		=> 4
-	)
-	Port map
-	(
-	
-		sys_rst_in			=> rst_in,
-		sys_clk_in			=> sys_clk_in,
-
-		sys_rst_out			=> rst,
-		sys_clk_out			=> clk,
-		sys_clk_fb			=> sys_sdr_clk_fb,
-		
-		busy				=> sdr_busy_q,
-		en					=> sdr_en,
-		r_wn				=> mem_re_r,
-		be					=> sdr_be,
-		addr				=> sdr_addr,
-		din					=> sdr_udata_in,
-		dout				=> sdr_udata_out_q,
-		dout_re				=> sdr_read,
-		dout_vld			=> sdr_udata_vld_q,
-		
-		-- SDRAM signals
-		sd_clk_p			=> sys_sdr_clk_p,
-		sd_clk_n			=> sys_sdr_clk_n,
-		sd_cke				=> sys_sdr_cke_q,
-		sd_cs_n				=> sys_sdr_cs_qn,
-		sd_cas_n			=> sys_sdr_cas_qn,
-		sd_ras_n			=> sys_sdr_ras_qn,
-		sd_we_n				=> sys_sdr_we_qn,
-		sd_addr				=> sys_sdr_a_q,
-		sd_ba				=> sys_sdr_ba_q,
-		sd_dm				=> sys_sdr_dm_q,
-		sd_dqs				=> sys_sdr_dqs_q,
-		sd_data				=> sys_sdr_data
-		
-	);
-
-	STARTUP_VIRTEX4_inst : STARTUP_VIRTEX4
-	port map (
-		EOS => started_up,      -- End of Startup 1-bit output
-		CLK => open,      -- Clock input for start-up sequence
-		GSR => '0', -- Global Set/Reset input (GSR cannot be used for the port name)
-		GTS => '0', -- Global 3-state input (GTS cannot be used for the port name)
-		USRCCLKO => '0',   -- USRCCLKO 1-bit input
-		USRCCLKTS => '0', -- USRCCLKTS 1-bit input
-		USRDONEO => '0',   -- USRDONEO 1-bit input
-		USRDONETS => '0'  -- USRDONETS 1-bit input
-	);
-   
-	------------------------------------------------------------------
-END;

projects/mips_sys/src/mips_sys_cfg.vhd

@@ -1,19 +0,0 @@
-library IEEE;
-USE IEEE.STD_LOGIC_1164.ALL;
-USE IEEE.NUMERIC_STD.ALL;
-
-configuration cpu_irom of cpu_embedded is
-	for rtl 
-		for inst_irom : irom
-			use entity work.irom(loadable);
-		end for;
-	end for;
-end configuration cpu_irom;
-
-configuration system_xrom of systest is
-	for behavior 
-		for inst_xrom : xrom
-			use entity work.xrom(loadable);
-		end for;
-	end for;
-end configuration system_xrom;

projects/mips_sys/src/mips_sys_sim.vhd

@@ -1,716 +0,0 @@
--------------------------------------------------------------------------
--- Project: JCPU, a portable 8-bit RISC CPU written in VHDL
--- This file: system test using Xilinx ML-402
-
--- Copyright (C) 2007 J. Ahrensfeld
-
--- This library is free software; you can redistribute it and/or
--- modify it under the terms of the GNU Lesser General Public
--- License as published by the Free Software Foundation; either
--- version 2.1 of the License, or (at your option) any later version.
-
--- This library is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
--- Lesser General Public License for more details.
-
--- You should have received a copy of the GNU Lesser General Public
--- License along with this library; if not, write to the Free Software
--- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
-
--- For questions and ideas, please contact the author at jens@jayfield.org
-
------------------------------------------------------------------------
-
-LIBRARY ieee;
-use IEEE.STD_LOGIC_1164.ALL;
-USE ieee.numeric_std.ALL;
-use std.textio.all; --  Imports the standard textio package.
-
-Library UNISIM;
-use UNISIM.vcomponents.all;
-
-library work;
-use work.mips_types.all;
---use work.fifo_ctrl_pkg.all;
-use work.sdram_config.all;
-use work.sdram_types.all;
-
-ENTITY mips_sys IS
-GENERIC
-(
-	sys_freq			: integer		    := 100E6;
-	ddr_phaseshift		: integer			:= 0;
-	ddr_frequency_hz	: integer			:= 100E6
-);
-PORT
-(
-	sys_rst_n_in		: in std_logic;
-	sys_clk_in			: in std_logic;
-
-	-- Buttons and LEDs
-	sys_btn				: in unsigned(4 downto 0);
-	sys_dip				: in unsigned(7 downto 0);
-	sys_led				: out unsigned(8 downto 0);
-
-	-- UART
-	sys_rx				: in std_logic;
-	sys_tx				: out std_logic;
-
-	-- User ROM
-	sys_user_rom_addr	: out word_t;
-	sys_user_rom_din	: in  word_t;
-	sys_user_rom_clk	: out std_logic;
-	sys_user_rom_en		: out std_logic;
-
-	-- LCD
-	sys_lcd_d			: inout unsigned(3 downto 0);
-	sys_lcd_e			: out std_logic;
-	sys_lcd_rs			: out std_logic;
-	sys_lcd_rw			: out std_logic;
-
-	-- DDR SDRAM
-	sys_sdr_clk_p		: out std_logic;    -- ddr_sdram_clock
-	sys_sdr_clk_n		: out std_logic;    -- /ddr_sdram_clock
-	sys_sdr_cke_q		: out std_logic;    -- clock enable
-	sys_sdr_cs_qn		: out std_logic;    -- /chip select
-	sys_sdr_ras_qn		: out std_logic;    -- /ras
-	sys_sdr_cas_qn		: out std_logic;    -- /cas
-	sys_sdr_we_qn		: out std_logic;    -- /write enable
-	sys_sdr_dm_q		: out unsigned(DDR_DM_WIDTH-1 downto 0);     -- data mask bits, set to "00"
-	sys_sdr_dqs_q		: inout unsigned(DDR_DQS_WIDTH-1 downto 0);    -- data strobe, only for write
-	sys_sdr_ba_q		: out unsigned(DDR_BANK_WIDTH-1 downto 0);   -- bank select
-	sys_sdr_a_q			: out unsigned(DDR_ADDR_WIDTH-1 downto 0);   -- address bus 
-	sys_sdr_data		: inout unsigned(DDR_DATA_WIDTH-1 downto 0); -- bidir data bus
-	sys_sdr_clk_fb		: in std_logic;
-	
-	-- VGA
---	sys_vga_red			: out unsigned(7 downto 0);
---	sys_vga_green		: out unsigned(7 downto 0);
---	sys_vga_blue		: out unsigned(7 downto 0);
---	sys_vga_blank_n		: out std_logic;
---	sys_vga_sync_n		: out std_logic;
---	sys_vga_hsync		: out std_logic;
---	sys_vga_vsync		: out std_logic;
---	sys_vga_clk			: out std_logic;
-
-	sys_error			: out unsigned(1 downto 0) -- indicates Errors
-	
-);
---	attribute BUFFER_TYPE : string;
---	attribute BUFFER_TYPE of sys_clk_in			: signal is "BUFG";
---	attribute BUFFER_TYPE of sys_sdr_dcm_clk_fb	: signal is "BUFG";
-
-END mips_sys;
-
-ARCHITECTURE behavior OF mips_sys IS 
-
-	COMPONENT mips_top
-	Port 
-	(
-		rst			: in  STD_LOGIC;
-		clk			: in  STD_LOGIC;
-		int			: in  unsigned(5 downto 0);
-		mem_valid	: in  STD_LOGIC;
-		mem_rdy		: in  STD_LOGIC;
-		mem_re		: out STD_LOGIC;
-		mem_en		: out STD_LOGIC;
-		mem_we		: out unsigned(3 downto 0);
-		mem_din		: in  word_t;
-		mem_dout	: out word_t;
-		mem_addr	: out word_t
-		
-	);
-	END COMPONENT;
-	signal int	 		: unsigned(5 downto 0);
-	signal mem_din		: word_t;
-	signal mem_dout 	: word_t;
-	signal mem_addr 	: word_t;
-	signal mem_re 		: std_logic;
-	signal mem_en 		: std_logic;
-	signal mem_we 		: unsigned(3 downto 0);
-	signal mem_valid	: std_logic;
-	signal mem_rdy		: std_logic;
-	
-	COMPONENT rom
-	Port 
-	(
-		clk			: in  STD_LOGIC;
-		ce			: in  STD_LOGIC;
-		addr		: in  word_t;
-		dout		: out word_t
-	);
-	END COMPONENT;
-	signal rom_data			: word_t;
-
-	COMPONENT ram
-		PORT 
-		(
-			clk			: in  STD_LOGIC;
-			ce			: in  STD_LOGIC;
-			we			: in  unsigned(3 downto 0);
-			addr		: in  unsigned(31 downto 0);
-			din			: in  unsigned(31 downto 0);
-			dout		: out unsigned(31 downto 0)
-		);
-	END COMPONENT;
-	signal ram_data			: word_t;
-
-	COMPONENT lcd_port
-	PORT (
-			rst			: in std_logic;
-			clk			: in std_logic;
-			we			: in std_logic;
-			din			: in unsigned(7 downto 0);
-			dout		: out unsigned(7 downto 0);
-			lcd_d		: inout unsigned(3 downto 0);
-			lcd_e		: out std_logic;
-			lcd_rs		: out std_logic;
-			lcd_rw		: out std_logic
-		);
-	END COMPONENT;
-
-	COMPONENT uart_tx
-    Port
-    (
-		data_in				: in std_logic_vector(7 downto 0);
-		write_buffer		: in std_logic;
-		reset_buffer		: in std_logic;
-		en_16_x_baud		: in std_logic;
-		serial_out			: out std_logic;
-		buffer_full			: out std_logic;
-		buffer_half_full	: out std_logic;
-		clk					: in std_logic
-	);
-	END COMPONENT;
-
-	COMPONENT uart_rx
-	Port 
-	(
-		serial_in			: in std_logic;
-		data_out			: out std_logic_vector(7 downto 0);
-		read_buffer			: in std_logic;
-		reset_buffer		: in std_logic;
-		en_16_x_baud		: in std_logic;
-		buffer_data_present	: out std_logic;
-		buffer_full			: out std_logic;
-		buffer_half_full	: out std_logic;
-		clk					: in std_logic
-	);
-	END COMPONENT;
-
-	signal rst : std_logic;
-	signal rst_in : std_logic;
-	signal started_up : std_logic := '1';
-	signal clk : std_logic;
-
-
-	signal led_reg : unsigned(7 downto 0);
-	signal cpu_lcd_out_reg, cpu_lcd_in_reg, reg_uart_tx: unsigned(7 downto 0);
-	signal cpu_lcd_we : std_logic;
-	signal err_led_reg		: unsigned(1 downto 0);
-	signal btn_ps2_reg : unsigned(7 downto 0);
-	
-	-- Signals to form an timer generating an interrupt every microsecond
-	subtype tick_usec_t	is natural range 0 to 99;
-	signal tick_usec		: tick_usec_t;
-	signal cnt_usec			: word_t;
-	signal cnt_sec			: word_t;
-	signal cnt_usec_preset	: word_t;
-	signal cnt_sec_preset	: word_t;
-	signal cnt_usec_en		: std_logic;
-	signal cnt_usec_we		: std_logic;
-	signal cnt_sec_en		: std_logic;
-	signal cnt_sec_we		: std_logic;
-	
-	-- Signals for UART connections
-	signal baud_count		: unsigned(7 downto 0);
-	signal en_16_x_baud		: std_logic;
-	signal reg_we_uart_tx	: std_logic;
-	signal tx_full			: std_logic;
-	signal tx_half_full		: std_logic;
-	signal reg_re_uart_rx	: std_logic;
-	signal reg_uart_rx		: std_logic_vector(7 downto 0);
-	signal rx_data_present	: std_logic;
-	signal rx_full			: std_logic;
-	signal rx_half_full		: std_logic;
-	signal uart_status_port	: unsigned(7 downto 0);
-	signal reg_uart_ctrl	: unsigned(7 downto 0);
-	signal reg_uart_baud	: unsigned(7 downto 0);
-
-	-- DDR SDRAM
-	constant BURST_LEN		: natural := 2;
-	subtype sdr_buf_t is unsigned(SDR_DATA_WIDTH-1 downto 0);
-	signal sdr_buf_in, sdr_vga_data : sdr_buf_t := (others => '0');
-
-	signal sdr_addr           : user_addr_t;
-	signal sdr_busy_q         : std_logic;
-	signal sdr_udata_in        : unsigned(SDR_DATA_WIDTH-1 downto 0);
-	signal sdr_udata_req_wr     : std_logic;
-	signal sdr_udata_out_q     : unsigned(SDR_DATA_WIDTH-1 downto 0);
-	signal sdr_udata_vld_q     	: std_logic;
-	signal sdr_be      		 : unsigned(SDR_DM_WIDTH-1 downto 0) := "00000000";
-	signal sdr_read         : std_logic;
-	signal sdr_en         : std_logic;
-	
-	signal reg_data			: word_t;
-	signal reg_data_vld		: std_logic;
-	signal reg_en			: std_logic;
-	signal rom_en			: std_logic;
-	signal rom_data_vld		: std_logic;
-	signal ram_en			: std_logic;
-	signal ram_data_vld		: std_logic;
-	signal urom_en			: std_logic;
-	signal urom_data_vld	: std_logic;
-	signal sdram_en			: std_logic;
-	signal sd_counter			: word_t;
-	signal mem_re_r			: std_logic;
-	signal mem_we_r			: unsigned(3 downto 0);
-	signal mem_dout_r		: word_t;
-	signal mem_addr_r		: word_t;
-	
---	attribute rom_style: string;
---	attribute rom_style of cmd_fifo_dout: signal is "DISTRIBUTED";
---	attribute rom_style of cpu_cpu_write_fifo_dout: signal is "DISTRIBUTED";
---	attribute rom_style of cpu_read_fifo_dout: signal is "DISTRIBUTED";
-
-	type sd_ctrl_state_t is (s_sd_idle, s_sd_cpu_read, s_sd_cpu_read_fin, s_sd_cpu_write, s_sd_cpu_write_fin);
-	signal st, stn : sd_ctrl_state_t;
-
-BEGIN
-
-	int 				<= "0000" & rx_data_present & btn_ps2_reg(4);
-	rst_in 				<= not (started_up and sys_rst_n_in);
-	
-en_mux:
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			if rst = '1' then
-				sdram_en	<= '0';
-			else	
-				urom_en		<= '0';
-				reg_en		<= '0';
-				rom_en		<= '0';
-				ram_en		<= '0';
---				sdram_en	<= '0';
-
-				if mem_en = '1' then
-					mem_re_r		<= mem_re;
-					mem_we_r		<= mem_we;
-					mem_dout_r		<= mem_dout;
-					mem_addr_r		<= mem_addr;
-
-					if mem_addr(31 downto 28) = X"0" then
-						urom_en <= '1';
-					elsif mem_addr(31 downto 28) = X"A" then
-						reg_en		<= '1';
-					elsif (mem_addr(31 downto 28) = X"B" and mem_addr(15) = '0') then
-						rom_en		<= '1';
-					elsif (mem_addr(31 downto 28) = X"B" and mem_addr(15) = '1') then
-						ram_en		<= '1';
-					elsif (mem_addr(31 downto 28) = X"8" or mem_addr(30) = '1') then
-						sdram_en	<= '1';
-					end if;
-				elsif sdr_en = '1' then
-					sdram_en	<= '0';
-				end if;	
-			end if;
-		end if;
-	end process;	
-
-	sys_user_rom_addr	<= mem_addr_r;
-	sys_user_rom_clk	<= clk;
-	sys_user_rom_en		<= urom_en;
-	
-	sdr_addr			<= mem_addr_r(24 downto 2) & "0";
-	
-	sdr_udata_in		<= mem_dout_r & mem_dout_r;
-	sdr_be				<= mem_we_r & mem_we_r;
-
-	sdr_read			<= '1';
-	sdr_en		 		<= sdram_en and not sdr_busy_q;
-		
-------------------------------------------------------------------
-led_out:
-	process(rst, clk)
-	begin
-		if rst = '1' then
-			sys_led		<= (others => '0');
-			sys_error	<= (others => '0');
-		elsif rising_edge(clk) then
-			sys_led		<= not mem_rdy & led_reg;
-			sys_error	<= err_led_reg;
-		end if;
-	end process;	
-		
-------------------------------------------------------------------
-btn_ps2_register:
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			btn_ps2_reg		<= "000" & unsigned(sys_btn);
-		end if;
-	end process;	
-		
-proc_sd_counter:
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			if rst = '1' then
-				sd_counter	<= (others => '0');
-			elsif sdr_udata_vld_q = '1' then
-				sd_counter	<= sd_counter + 1;
-			end if;
-		end if;
-	end process;	
-
-	mem_valid	<= sdr_udata_vld_q or reg_data_vld or rom_data_vld or urom_data_vld or ram_data_vld;
-	mem_din		<=	sdr_udata_out_q(mem_din'left downto mem_din'right) when sdr_udata_vld_q = '1' else
-					reg_data when reg_data_vld = '1' else
-					rom_data when rom_data_vld = '1' else
-					sys_user_rom_din when urom_data_vld = '1' else
-					ram_data when ram_data_vld = '1';
-		
-------------------------------------------------------------------
-inst_rom: rom
-	PORT MAP
-	(
-		clk			=> clk,
-		ce			=> rom_en,
-		addr		=> mem_addr_r,
-		dout 		=> rom_data
-	);
-
-inst_ram: ram
-	PORT MAP 
-	(
-		clk		=> clk,
-		ce		=> ram_en,
-		we		=> mem_we_r,
-		addr	=> mem_addr_r,
-		din		=> mem_dout_r,
-		dout	=> ram_data
-	);
-	
-	
-ram_read: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			ram_data_vld		<= '0';
-			if ram_en = '1' and mem_re_r = '1' then
-				ram_data_vld	<= '1';
-			end if;
-		end if;	
-	end process;
-
-rom_read: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			rom_data_vld		<= '0';
-			if rom_en = '1' and mem_re_r = '1' then
-				rom_data_vld	<= '1';
-			end if;
-		end if;	
-	end process;
-
-urom_read: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			urom_data_vld		<= '0';
-			if urom_en = '1' then
-				urom_data_vld	<= '1';
-			end if;
-		end if;	
-	end process;
-
-registers_read: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			reg_data_vld		<= '0';
-			reg_re_uart_rx	<= '0';
-			if reg_en = '1' and mem_re_r = '1' then
-				reg_data_vld		<= '1';
-				reg_data			<= (others => '0');
-				case mem_addr_r(5 downto 2) is
-
-				when "0000" => null;
-
-				when "0001" =>
-					reg_re_uart_rx			<= mem_re_r;
-					reg_data(7 downto 0)	<= unsigned(reg_uart_rx);
-
-				when "0010" =>
-					reg_data(7 downto 0)	<= uart_status_port;
-					reg_data(15 downto 8)	<= reg_uart_baud;
-					reg_data(23 downto 16)	<= btn_ps2_reg;
-					reg_data(31 downto 24)	<= cpu_lcd_in_reg;
-
-				when "0100" =>
-					reg_data				<= cnt_usec;
-
-				when "0101" =>
-					reg_data				<= cnt_sec;
-
-				when others => null;
-				end case;
-			end if;
-		end if;	
-	end process;
-
-------------------------------------------------------------------
-registers_write: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			cpu_lcd_we		<= '0';
-			reg_we_uart_tx	<= '0';
-			cnt_usec_we		<= '0';
-			cnt_sec_we		<= '0';
-			if rst = '1' then
-				led_reg			<= (others => '0');
-				err_led_reg		<= (others => '0');
-				cpu_lcd_out_reg	<= (others => '0');
-				reg_uart_baud	<= to_unsigned(53, 8);
-				reg_uart_ctrl	<= to_unsigned(0, 8);
-			elsif reg_en = '1' then
-				case mem_addr_r(5 downto 2) is
-				
-				when "0000" =>
-					if mem_we_r(0) = '1' then
-						led_reg(7 downto 0) <= mem_dout_r(7 downto 0);
-					end if;	
-					if mem_we_r(3) = '1' then
-						err_led_reg			<= mem_dout_r(31 downto 30);
-					end if;	
-					
-				when "0001" =>
-					if mem_we_r(0) = '1' then
-						reg_we_uart_tx	<= '1';
-						reg_uart_tx <= mem_dout_r(7 downto 0);
-					end if;	
-					
-				when "0010" =>
-					if mem_we_r(0) = '1' then
-						reg_uart_ctrl	<= mem_dout_r(7 downto 0);
-					end if;	
-					if mem_we_r(1) = '1' then
-						reg_uart_baud	<= mem_dout_r(15 downto 8);
-					end if;	
-					if mem_we_r(3) = '1' then
-						cpu_lcd_we		<= '1';
-						cpu_lcd_out_reg	<= mem_dout_r(31 downto 24);
-					end if;	
-
-				when "0100" =>
-					if mem_we_r(3) = '1' then
-						cnt_usec_we		<= '1';
-						cnt_usec_preset	<= mem_dout_r;
-					end if;	
-
-				when "0101" =>
-					if mem_we_r(3) = '1' then
-						cnt_sec_we		<= '1';
-						cnt_sec_preset	<= mem_dout_r;
-					end if;	
-
-				when others => null;
-				end case;
-			end if;	
-		end if;	
-	end process;
-	
-------------------------------------------------------------------
-	mem_rdy				<= not sdr_busy_q;
-
-------------------------------------------------------------------
-inst_mips_top: mips_top
-	PORT MAP
-	(
-		rst				=> rst,
-		clk				=> clk,
-		int				=> int,
-		mem_valid		=> mem_valid,
-		mem_rdy			=> mem_rdy,
-		mem_en			=> mem_en,
-		mem_re			=> mem_re,
-		mem_we			=> mem_we,
-		mem_din			=> mem_din,
-		mem_dout		=> mem_dout,
-		mem_addr		=> mem_addr
-	);
-
-inst_lcd_port: lcd_port
-	PORT MAP
-	(
-		rst => rst,
-		clk => clk,
-		we => cpu_lcd_we,
-		din => cpu_lcd_out_reg,
-		dout => cpu_lcd_in_reg,
-		lcd_d => sys_lcd_d,
-		lcd_e => sys_lcd_e,
-		lcd_rs => sys_lcd_rs,
-		lcd_rw => sys_lcd_rw
-	);
-	
-inst_uart_tx: uart_tx 
-	port map
-	(
-		data_in				=> std_logic_vector(reg_uart_tx), 
-		write_buffer		=> reg_we_uart_tx,
-		reset_buffer		=> rst,
-		en_16_x_baud		=> en_16_x_baud,
-		serial_out			=> sys_tx,
-		buffer_full			=> tx_full,
-		buffer_half_full	=> tx_half_full,
-		clk					=> clk
-	);
-	
-inst_uart_rx: uart_rx
-	port map
-	(
-		serial_in			=> sys_rx,
-		data_out			=> reg_uart_rx,
-		read_buffer			=> reg_re_uart_rx,
-		reset_buffer		=> rst,
-		en_16_x_baud		=> en_16_x_baud,
-		buffer_data_present => rx_data_present,
-		buffer_full			=> rx_full,
-		buffer_half_full	=> rx_half_full,
-		clk					=> clk
-	);  
-
-	uart_status_port <= (7 downto 5 => '0') & rx_data_present & rx_full & rx_half_full & tx_full & tx_half_full;
-
-tick_usec_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			cnt_usec_en		<= '0';
-			if rst = '1' then
-				tick_usec	<= 0;
-				cnt_usec_en	<= '0';
-			elsif tick_usec = tick_usec_t'high then
-				tick_usec		<= 0;
-				cnt_usec_en		<= '1';
-			else
-				tick_usec		<= tick_usec + 1;
-			end if;
-		end if;
-	end process;
-
-cnt_usec_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			cnt_sec_en		<= '0';
-			if rst = '1' then
-				cnt_usec	<= (others => '0');
-				cnt_sec_en	<= '0';
-			elsif cnt_usec_we = '1' then
-				cnt_usec		<= cnt_usec_preset;
-			elsif cnt_usec_en = '1' then
-				if cnt_usec = to_unsigned(1E6 - 1, word_t'length) then
-					cnt_usec		<= (others => '0');
-					cnt_sec_en		<= '1';
-				else
-					cnt_usec		<= cnt_usec + 1;
-				end if;
-			end if;	
-		end if;
-	end process;
-
-cnt_sec_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			if rst = '1' then
-				cnt_sec		<= (others => '0');
-			elsif cnt_sec_we = '1' then
-				cnt_sec		<= cnt_sec_preset;
-			elsif cnt_sec_en = '1' then
-				cnt_sec		<= cnt_sec + 1;
-			end if;	
-		end if;
-	end process;
-
-baud_timer:
-	process(clk)
-	begin
-		if clk'event and clk='1' then
-			if rst = '1' then
-				baud_count <= (others => '0');
-			elsif baud_count = reg_uart_baud then
-				baud_count <= (others => '0');
-				en_16_x_baud <= '1';
-			else
-				baud_count <= baud_count + 1;
-				en_16_x_baud <= '0';
-			end if;
-		end if;
-	end process;
-
-	-- DDR SDRAM Controller Core
-	inst_sdram_ctrl_frontend : entity work.sdram_ctrl_frontend
-	Generic map
-	(
-		BL 				=> BURST_LEN,
-		read_phaseshift => ddr_phaseshift,
-		f_sysclk 		=> ddr_frequency_hz,
-		fifo_depth		=> 4
-	)
-	Port map
-	(
-	
-		sys_rst_in			=> rst_in,
-		sys_clk_in			=> sys_clk_in,
-
-		sys_rst_out			=> rst,
-		sys_clk_out			=> clk,
-		sys_clk_fb			=> sys_sdr_clk_fb,
-		
-		busy				=> sdr_busy_q,
-		en					=> sdr_en,
-		r_wn				=> mem_re_r,
-		be					=> sdr_be,
-		addr				=> sdr_addr,
-		din					=> sdr_udata_in,
-		dout				=> sdr_udata_out_q,
-		dout_re				=> sdr_read,
-		dout_vld			=> sdr_udata_vld_q,
-		
-		-- SDRAM signals
-		sd_clk_p			=> sys_sdr_clk_p,
-		sd_clk_n			=> sys_sdr_clk_n,
-		sd_cke				=> sys_sdr_cke_q,
-		sd_cs_n				=> sys_sdr_cs_qn,
-		sd_cas_n			=> sys_sdr_cas_qn,
-		sd_ras_n			=> sys_sdr_ras_qn,
-		sd_we_n				=> sys_sdr_we_qn,
-		sd_addr				=> sys_sdr_a_q,
-		sd_ba				=> sys_sdr_ba_q,
-		sd_dm				=> sys_sdr_dm_q,
-		sd_dqs				=> sys_sdr_dqs_q,
-		sd_data				=> sys_sdr_data
-		
-	);
-
-	STARTUP_VIRTEX4_inst : STARTUP_VIRTEX4
-	port map (
-		EOS => started_up,      -- End of Startup 1-bit output
-		CLK => open,      -- Clock input for start-up sequence
-		GSR => '0', -- Global Set/Reset input (GSR cannot be used for the port name)
-		GTS => '0', -- Global 3-state input (GTS cannot be used for the port name)
-		USRCCLKO => '0',   -- USRCCLKO 1-bit input
-		USRCCLKTS => '0', -- USRCCLKTS 1-bit input
-		USRDONEO => '0',   -- USRDONEO 1-bit input
-		USRDONETS => '0'  -- USRDONETS 1-bit input
-	);
-
-	------------------------------------------------------------------
-END;

projects/mips_sys/src/ram_ld.vhd

@@ -1,173 +0,0 @@
--------------------------------------------------------------------------
--- Project: JCPU, a portable 8-bit RISC CPU written in VHDL
--- This file: The ROM file for use in your VHDL design
---
--- Copyright (C) 2007 J. Ahrensfeld
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 3 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see <http://www.gnu.org/licenses/>.
---
--- For questions and ideas, please contact the author at jens@jayfield.org
---
---------------------------------------------------------------------------
-
-LIBRARY ieee;
-use IEEE.STD_LOGIC_1164.ALL;
-USE ieee.numeric_std.ALL;
-
-library UNISIM;
-use UNISIM.VComponents.all;
-
-ENTITY ram IS
-	Port 
-	(
-		clk			: in  STD_LOGIC;
-		ce			: in  STD_LOGIC;
-		we			: in  unsigned(3 downto 0);
-		addr		: in  unsigned(31 downto 0);
-		din			: in  unsigned(31 downto 0);
-		dout		: out unsigned(31 downto 0)
-	);
-END ram;
-
-ARCHITECTURE behavior OF ram IS 
-
-	COMPONENT dpram_2w2r
-	Generic 
-	(
-		addr_width : integer;
-		data_width : integer
-	);
-	Port
-	(
-		clk_a		: in  STD_LOGIC;
-		clk_b		: in  STD_LOGIC;
-		en_a		: in  STD_LOGIC;
-		en_b		: in  STD_LOGIC;
-		we_a		: in  STD_LOGIC;
-		we_b		: in  STD_LOGIC;
-		addr_a		: in  unsigned (addr_width-1 downto 0);
-		addr_b		: in  unsigned (addr_width-1 downto 0);
-		din_a		: in  unsigned (data_width-1 downto 0);
-		din_b		: in  unsigned (data_width-1 downto 0);
-		dout_a		: out unsigned (data_width-1 downto 0);
-		dout_b		: out unsigned (data_width-1 downto 0)
-	);
-	END COMPONENT;
-	
-	signal jtag_clk		: STD_LOGIC;
-	signal jtag_we		: unsigned(3 downto 0);
-	signal jtag_addr	: unsigned (15 downto 0);
-	signal jtag_dout	: unsigned (31 downto 0);
-	signal jtag_din		: unsigned (31 downto 0);
-	signal bs_rst, bs_sel, bs_shift, bs_tdi, bs_tdo : std_logic;
-	signal bs_capture, bs_clk0, bs_clk1, bs_update0, bs_update1 : std_logic;
-	signal user_regi, user_rego : unsigned (47 downto 0);
-	
-BEGIN
-
-gen_sram:
-	for i in 0 to 3 generate
-	begin
-	inst_dpram_2w2r : dpram_2w2r
-		GENERIC MAP
-		(
-			addr_width	=> 11,
-			data_width	=> 8
-		)
-		PORT MAP
-		(
-			clk_a		=> clk,
-			en_a		=> ce,
-			we_a		=> we(i),
-			addr_a		=> addr(12 downto 2),
-			din_a		=> din((i+1)*8-1 downto i*8),
-			dout_a		=> dout((i+1)*8-1 downto i*8),
-
-			clk_b		=> jtag_clk,
-			en_b		=> jtag_we(i),
-			we_b		=> jtag_we(i),
-			addr_b		=> jtag_addr(10 downto 0),
-			din_b		=> jtag_din((i+1)*8-1 downto i*8),
-			dout_b		=> jtag_dout((i+1)*8-1 downto i*8)
-		);
-	end generate;
-	
---------------------------------------------------------------------------
--- Virtex-4: JTAG Loader
---------------------------------------------------------------------------
-	i00_BUFG : BUFG
-	port map
-	(
-		O => bs_clk1,
-        I => bs_clk0
-	);
-	
-	i01_BUFG : BUFG
-	port map
-	(
-		O => bs_update1,
-        I => bs_update0
-	);
-
-	BSCAN_VIRTEX4_inst2 : BSCAN_VIRTEX4 
-	generic map
-	(
-		JTAG_CHAIN => 2 -- Value to set BSCAN site of device. Possible values: (1,2,3 or 4)
-	)
-	port map 
-	(
-		CAPTURE => bs_capture, -- CAPTURE output from TAP controller
-		DRCK => bs_clk0,       -- Data register output for USER functions
-		RESET => bs_rst,       -- Reset output from TAP controller
-		SEL => bs_sel,         -- USER active output
-		SHIFT => bs_shift,     -- SHIFT output from TAP controller
-		TDI => bs_tdi,        -- TDI output from TAP controller
-		UPDATE => bs_update0,   -- UPDATE output from TAP controller
-		TDO => bs_tdo         -- Data input for USER function
-	);
-
-	jtag_addr	<= user_regi(user_regi'left downto jtag_dout'length);
-	jtag_din	<= user_regi(jtag_dout'length-1 downto 0);
-	jtag_clk	<= bs_update1;
-	jtag_we		<= (3 downto 0 => bs_sel);
-	
-sipo:
-	process (bs_rst, bs_clk1, bs_tdi, bs_shift)
-	begin
-		if bs_rst = '1' then
-			user_regi <= (others => '0');
-		elsif rising_edge(bs_clk1) then
-			if bs_shift = '1' then
-				user_regi <= bs_tdi & user_regi(user_regi'left downto 1);
-			end if;
-		end if;
-	end process;	
-
-piso:
-	process (bs_rst, bs_clk1, bs_shift, user_rego)
-	begin
-		bs_tdo <= user_rego(0);
-		if bs_rst = '1' then
-			user_rego <= (others => '0');
-		elsif rising_edge(bs_clk1) then
-			if bs_shift = '1' then
-				user_rego <= user_rego(0) & user_rego(user_rego'left downto 1);
-			else
-				user_rego <= (user_rego'left downto jtag_dout'length => '0') & jtag_dout;	
-			end if;
-		end if;
-	end process;	
-	
---------------------------------------------------------------------------
-end behavior;

projects/mips_sys/src/ram_sim.vhd

@@ -1,88 +0,0 @@
--------------------------------------------------------------------------
--- Project: JCPU, a portable 8-bit RISC CPU written in VHDL
--- This file: The ROM file for use in your VHDL design
---
--- Copyright (C) 2007 J. Ahrensfeld
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 3 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see <http://www.gnu.org/licenses/>.
---
--- For questions and ideas, please contact the author at jens@jayfield.org
---
---------------------------------------------------------------------------
-
-LIBRARY ieee;
-use IEEE.STD_LOGIC_1164.ALL;
-USE ieee.numeric_std.ALL;
-
-
-ENTITY ram IS
-	Generic 
-	(
-		word_addr_width 	: integer := 6
-	);
-	Port 
-	(
-		clk			: in  STD_LOGIC;
-		ce			: in  STD_LOGIC;
-		we			: in  unsigned(3 downto 0);
-		addr		: in  unsigned(31 downto 0);
-		din			: in  unsigned(31 downto 0);
-		dout		: out unsigned(31 downto 0)
-	);
-END ram;
-
-ARCHITECTURE behavior OF ram IS 
-
-	constant depth : natural := 2**word_addr_width;
-	
-	type sram_t is array (0 to depth-1) of unsigned(31 downto 0);
-
-	function sram_clear return sram_t is
-
-	variable result : sram_t;
-	begin
-		for i in 0 to sram_t'length-1 loop
-			result(i) := (others => '0');
-		end loop;
-		return result;
-	end sram_clear;
-
-	signal sram : sram_t := sram_clear;
-	
-BEGIN
-
-
-SRAM_RW:
-	process(clk)
-	variable index : natural range 0 to depth-1;
-	begin
-		if rising_edge(clk) and ce = '1' then
-			index := to_integer(addr(word_addr_width+1 downto 2));
-			if we(0) = '1' then
-				sram(index)(7 downto 0)		<= din(7 downto 0);
-			end if;	
-			if we(1) = '1' then
-				sram(index)(15 downto 8)	<= din(15 downto 8);
-			end if;	
-			if we(2) = '1' then
-				sram(index)(23 downto 16)	<= din(23 downto 16);
-			end if;	
-			if we(3) = '1' then
-				sram(index)(31 downto 24)	<= din(31 downto 24);
-			end if;	
-			dout <= sram(index);
-		end if;	
-	end process;
-	
-end behavior;

projects/mips_sys/src/sdram_config.vhd

@@ -1,74 +0,0 @@
--------------------------------------------------------------------------
--- Project: SDRAM controller
--- This file: User SDRAM component adjustments
---
--- Copyright (C) 2007 J. Ahrensfeld
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 3 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see <http://www.gnu.org/licenses/>.
---
--- For questions and ideas, please contact the author at jens@jayfield.org
---
---------------------------------------------------------------------------
-
-library IEEE;
-USE IEEE.STD_LOGIC_1164.ALL;
-USE IEEE.NUMERIC_STD.ALL;
-
-package sdram_config is
-
-	constant DDR_DATA_WIDTH 	: positive := 32;  -- External DDR-SDRAM Module data bus width
-	constant DDR_ADDR_WIDTH 	: positive := 13;  -- number of address lines to DDR-SDRAM Device/Module
-	constant DDR_BANK_WIDTH 	: positive := 2;   -- Number of BANK address lines of external DDR-SDRAM
-	constant DDR_ROW_ADDR_WIDTH	: positive := 13;  -- 
-	constant DDR_COL_ADDR_WIDTH	: positive := 9;  -- 
-	
-	constant LMR_REG_BASE		: natural := 0;
-	constant LMR_REG_EXTENDED	: natural := 1;
-	constant LMR_OP_NORMAL		: natural := 0;
-	constant LMR_OP_RES_DLL		: natural := 2;
-	constant LMR_BT_SEQ			: natural := 0;
-	constant LMR_BT_ILVD		: natural := 1;
-	constant LMR_BL2			: natural := 1;
-	constant LMR_BL4			: natural := 2;
-	constant LMR_BL8			: natural := 3;
-	constant LMR_CL2			: natural := 2;
-	constant LMR_CL3			: natural := 3;
-	constant LMR_CL2_5			: natural := 6;
-	
-	-- DDR SDRAM Hardware defined constants
-	constant BIT_AUTO_PRE		: positive := 10; -- bit-position in column address for auto precharge (see Data Sheet)
-	constant BIT_PRE_ALL		: positive := 10; -- bit-position in column address for precharge all (see Data Sheet)
-	constant ENABLE_PRE_ALL		: std_logic := '1';
-	constant ENABLE_AUTO_PRE	: std_logic := '0';
-	
-	-- DDR-SDR TIMING constants ------------------------------------------------------------------
-	-- After REFRESH_CLOCKS a refresh cycle is necessary, 64ms / 8192 = max every 7.8125 us refesh 
-	constant REFRESH_INTERVAL : real := 7.8125; -- us
-
-	-- These values are for your SDRAM part (see datasheet) 
-	constant TCAS : positive  := 2;   -- CAS latency [clocks]
-	constant TRP  : positive  := 2;   -- precharge command period
-	constant TRAS : positive  := 5;   -- active to precharge delay 
-	constant TRFC : positive  := 8;   -- auto refresh command period
-	constant TMRD : positive  := 2;   -- load mode register command cylce time
-	constant TRCD : positive  := 2;   -- active to read or write delay !
-	constant TWR  : positive  := 2;   -- write recovery time
-
-	constant PWR_UP_WAIT : natural := 222; -- µs
-
-	subtype user_tag_t is unsigned(3 downto 0);
-
-	----------------------------------------------------------------------------------------------
-	
-end sdram_config;

projects/mips_sys/src/sdram_config_sim.vhd

@@ -1,74 +0,0 @@
--------------------------------------------------------------------------
--- Project: SDRAM controller
--- This file: User SDRAM component adjustments
---
--- Copyright (C) 2007 J. Ahrensfeld
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 3 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see <http://www.gnu.org/licenses/>.
---
--- For questions and ideas, please contact the author at jens@jayfield.org
---
---------------------------------------------------------------------------
-
-library IEEE;
-USE IEEE.STD_LOGIC_1164.ALL;
-USE IEEE.NUMERIC_STD.ALL;
-
-package sdram_config is
-
-	constant DDR_DATA_WIDTH 	: positive := 32;  -- External DDR-SDRAM Module data bus width
-	constant DDR_ADDR_WIDTH 	: positive := 13;  -- number of address lines to DDR-SDRAM Device/Module
-	constant DDR_BANK_WIDTH 	: positive := 2;   -- Number of BANK address lines of external DDR-SDRAM
-	constant DDR_ROW_ADDR_WIDTH	: positive := 13;  -- 
-	constant DDR_COL_ADDR_WIDTH	: positive := 9;  -- 
-	
-	constant LMR_REG_BASE		: natural := 0;
-	constant LMR_REG_EXTENDED	: natural := 1;
-	constant LMR_OP_NORMAL		: natural := 0;
-	constant LMR_OP_RES_DLL		: natural := 2;
-	constant LMR_BT_SEQ			: natural := 0;
-	constant LMR_BT_ILVD		: natural := 1;
-	constant LMR_BL2			: natural := 1;
-	constant LMR_BL4			: natural := 2;
-	constant LMR_BL8			: natural := 3;
-	constant LMR_CL2			: natural := 2;
-	constant LMR_CL3			: natural := 3;
-	constant LMR_CL2_5			: natural := 6;
-	
-	-- DDR SDRAM Hardware defined constants
-	constant BIT_AUTO_PRE		: positive := 10; -- bit-position in column address for auto precharge (see Data Sheet)
-	constant BIT_PRE_ALL		: positive := 10; -- bit-position in column address for precharge all (see Data Sheet)
-	constant ENABLE_PRE_ALL		: std_logic := '1';
-	constant ENABLE_AUTO_PRE	: std_logic := '0';
-	
-	-- DDR-SDR TIMING constants ------------------------------------------------------------------
-	-- After REFRESH_CLOCKS a refresh cycle is necessary, 64ms / 8192 = max every 7.8125 us refesh 
-	constant REFRESH_INTERVAL : real := 7.8125; -- us
-
-	-- These values are for your SDRAM part (see datasheet) 
-	constant TCAS : positive  := 2;   -- CAS latency [clocks]
-	constant TRP  : positive  := 2;   -- precharge command period
-	constant TRAS : positive  := 5;   -- active to precharge delay 
-	constant TRFC : positive  := 8;   -- auto refresh command period
-	constant TMRD : positive  := 2;   -- load mode register command cylce time
-	constant TRCD : positive  := 2;   -- active to read or write delay !
-	constant TWR  : positive  := 2;   -- write recovery time
-
-	constant PWR_UP_WAIT : natural := 22; -- µs
-
-	subtype user_tag_t is unsigned(3 downto 0);
-
-	----------------------------------------------------------------------------------------------
-	
-end sdram_config;

projects/mips_sys/src/tb_mips_sys.vhd

@@ -1,208 +0,0 @@
--------------------------------------------------------------------------
--- Project: JCPU, a portable 8-bit RISC CPU written in VHDL
--- This file: testbench for system test using Xilinx ML-402
-
--- Copyright (C) 2007 J. Ahrensfeld
-
--- This library is free software; you can redistribute it and/or
--- modify it under the terms of the GNU Lesser General Public
--- License as published by the Free Software Foundation; either
--- version 2.1 of the License, or (at your option) any later version.
-
--- This library is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
--- Lesser General Public License for more details.
-
--- You should have received a copy of the GNU Lesser General Public
--- License along with this library; if not, write to the Free Software
--- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
-
--- For questions and ideas, please contact the author at jens@jayfield.org
-
------------------------------------------------------------------------
-
-LIBRARY ieee;
-use IEEE.STD_LOGIC_1164.ALL;
-USE ieee.numeric_std.ALL;
-use std.textio.all; --  Imports the standard textio package.
-
-library work;
-use work.mips_types.all;
-use work.sdram_config.all;
-use work.sdram_types.all;
-
-ENTITY tb_mips_sys IS
-END tb_mips_sys;
-
-ARCHITECTURE behavior OF tb_mips_sys IS 
-
-	constant CLK_PERIOD : time := 10 ns;
-	signal sys_rst_n_in : std_logic := '0';
-	signal sys_clk_in : std_logic := '1';
-	signal dip  : unsigned(7 downto 0) := (others => '0');
-	signal btn  : unsigned(4 downto 0) := (others => '0');
-	signal led : unsigned(8 downto 0);
-	signal sys_rx : std_logic := '1';
-	signal sys_tx : std_logic;
-	
-	signal sys_lcd_d			: unsigned(3 downto 0);
-	signal sys_lcd_e			: std_logic;
-	signal sys_lcd_rs			: std_logic;
-	signal sys_lcd_rw			: std_logic;
-
-	signal refresh        : boolean:= true;
-
-	signal sys_sdr_clk_p		: std_logic;    -- ddr_sdram_clock
-	signal sys_sdr_clk_n		: std_logic;    -- /ddr_sdram_clock
-	signal sys_sdr_cke_q		: std_logic;    -- clock enable
-	signal sys_sdr_cs_qn		: std_logic;    -- /chip select
-	signal sys_sdr_ras_qn		: std_logic;    -- /ras
-	signal sys_sdr_cas_qn		: std_logic;    -- /cas
-	signal sys_sdr_we_qn		: std_logic;    -- /write enable
-	signal sys_sdr_dm_q			: unsigned(DDR_DM_WIDTH-1 downto 0);     -- data mask bits, set to "00"
-	signal sys_sdr_dqs_q		: unsigned(DDR_DQS_WIDTH-1 downto 0);    -- data strobe, only for write
-	signal sys_sdr_ba_q			: unsigned(DDR_BANK_WIDTH-1 downto 0);   -- bank select
-	signal sys_sdr_a_q			: unsigned(DDR_ADDR_WIDTH-1 downto 0);   -- address bus 
-	signal sys_sdr_data			: unsigned(DDR_DATA_WIDTH-1 downto 0); -- bidir data bus
-
-	signal sys_error			: unsigned(1 downto 0); -- indicates DCM Errors
-	signal sys_sdr_clk_fb		: std_logic;
-
-	constant UROM_ADDR_WIDTH	: integer := 18;
-	signal sys_user_rom_clk		: std_logic;   
-	signal sys_user_rom_en		: std_logic;   
-	signal sys_user_rom_din		: word_t;  
-	signal sys_user_rom_addr	: word_t;   
-	
-	type urom_data_t is array (natural range 0 to 2**(UROM_ADDR_WIDTH-2)-1) of word_t;
-	signal urom_data : urom_data_t;
-	
-BEGIN
-
-uut: entity work.mips_sys
---	GENERIC MAP
---	(
---		ddr_phaseshift => 90,
---		ddr_frequency_hz => 100E6
---	)
-	PORT MAP
-	(
-		sys_rst_n_in => sys_rst_n_in,
-		sys_clk_in => sys_clk_in,
-		sys_btn => btn,
-		sys_dip => dip,
-		sys_led => led,
-
-		sys_rx => sys_rx,
-		sys_tx => sys_tx,
-
-		sys_lcd_d => sys_lcd_d,
-		sys_lcd_e => sys_lcd_e,
-		sys_lcd_rs => sys_lcd_rs,
-		sys_lcd_rw => sys_lcd_rw,
-
-		sys_user_rom_addr => sys_user_rom_addr,
-		sys_user_rom_din => sys_user_rom_din,
-		sys_user_rom_en => sys_user_rom_en,
-		sys_user_rom_clk => sys_user_rom_clk,
-
-		sys_sdr_clk_p => sys_sdr_clk_p,
-		sys_sdr_clk_n => sys_sdr_clk_n,
-		sys_sdr_cke_q => sys_sdr_cke_q,
-		sys_sdr_clk_fb => sys_sdr_clk_fb,
-		sys_sdr_cs_qn => sys_sdr_cs_qn,
-		sys_sdr_ras_qn => sys_sdr_ras_qn,
-		sys_sdr_cas_qn => sys_sdr_cas_qn,
-		sys_sdr_we_qn => sys_sdr_we_qn,
-		sys_sdr_dm_q => sys_sdr_dm_q,
-		sys_sdr_dqs_q => sys_sdr_dqs_q,
-		sys_sdr_ba_q => sys_sdr_ba_q,
-		sys_sdr_a_q => sys_sdr_a_q,
-		sys_sdr_data => sys_sdr_data,
-		sys_error => sys_error
-	);
-
-   -- MICRON DDR SDRAM Simulation Model
-   i_mt46v16m16_0 : entity work.mt46v16m16 
-      port map (
-         dq    => std_logic_vector(sys_sdr_data(15 downto 0)),
-         dqs   => std_logic_vector(sys_sdr_dqs_q(1 downto 0)),
-         addr  => std_logic_vector(sys_sdr_a_q),
-         ba    => std_logic_vector(sys_sdr_ba_q),
-         clk   => sys_sdr_clk_p,
-         clk_n => sys_sdr_clk_n,
-         cke   => sys_sdr_cke_q,
-         cs_n  => sys_sdr_cs_qn,
-         ras_n => sys_sdr_ras_qn,
-         cas_n => sys_sdr_cas_qn,
-         we_n  => sys_sdr_we_qn,
-         dm    => std_logic_vector(sys_sdr_dm_q(1 downto 0))
-         );
-
-   -- MICRON DDR SDRAM Simulation Model
-   i_mt46v16m16_1 : entity work.mt46v16m16 
-      port map (
-         dq    => std_logic_vector(sys_sdr_data(31 downto 16)),
-         dqs   => std_logic_vector(sys_sdr_dqs_q(3 downto 2)),
-         addr  => std_logic_vector(sys_sdr_a_q),
-         ba    => std_logic_vector(sys_sdr_ba_q),
-         clk   => sys_sdr_clk_p,
-         clk_n => sys_sdr_clk_n,
-         cke   => sys_sdr_cke_q,
-         cs_n  => sys_sdr_cs_qn,
-         ras_n => sys_sdr_ras_qn,
-         cas_n => sys_sdr_cas_qn,
-         we_n  => sys_sdr_we_qn,
-         dm    => std_logic_vector(sys_sdr_dm_q(3 downto 2))
-         );
-
-	sys_sdr_clk_fb   <= sys_sdr_clk_p after 2300 ps;
-	refresh <= true when falling_edge(sys_sdr_ras_qn) and falling_edge(sys_sdr_cas_qn) and sys_sdr_we_qn='1' else false;
-
-CLK_GEN: process
-	begin
-		wait for CLK_PERIOD/2;
-		sys_clk_in <= not sys_clk_in;
-	end process;
-
-UROM_READ: process(sys_rst_n_in, sys_user_rom_clk)
-	type file_t is file of integer;
-	file load_urom : file_t open read_mode is "test_dcache.bin";
-	variable instr : integer;
-	variable index : natural;
-	variable temp : signed(31 downto 0);
-	begin
-		if sys_rst_n_in = '0' then
-			index := 0;
-			while not endfile(load_urom) loop
-				read(load_urom, instr);
-				temp	:= to_signed(instr, word_t'length);
-				urom_data(index) <= unsigned(temp);
-				index := index + 1;
-			end loop;
-		elsif rising_edge(sys_user_rom_clk) and sys_user_rom_en = '1' then
-			index := to_integer(sys_user_rom_addr(UROM_ADDR_WIDTH+1 downto 2));
-			sys_user_rom_din <= urom_data(index);
-		end if;	
-	end process;
-
-STIMULUS: process
-
-	begin
-
-		wait for 3*CLK_PERIOD;
-		sys_rst_n_in <= '1';
-		wait for 200000*CLK_PERIOD;
-		
-		loop
-		wait for 251*CLK_PERIOD;
-		btn(4)		<= '1';			
-		wait for 311*CLK_PERIOD;
-		btn(4)		<= '0';			
-		end loop;
-		wait; 
-	
-	end process;
-	
-END;

projects/mips_sys/tools/insrom.rb

@@ -1,46 +0,0 @@
-#!/usr/bin/env ruby
-
-# ----------------------------------------------------------------------
-# Project: JIPS, a portable 32-bit RISC CPU written in VHDL
-# This file: Insertion of code fragments into templates
-#
-# Copyright (C) 2008 J. Ahrensfeld
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-# 
-# For questions and ideas, please contact the author at jens@jayfield.org
-#
-# ---------------------------------------------------------------------
-
-arg = $*
-rom_filename = arg[0].to_s
-tpl_filename = arg[1].to_s
-
-subst_pattern = "ROM_INSERT_HERE"
-
-# --------------------------------------------------------
-# Open file
-# --------------------------------------------------------
-romfile = File.open(rom_filename, "r")
-tplfile = File.open(tpl_filename, "r")
-re = Regexp.new(subst_pattern)
-
-while (line = tplfile.gets)
-	puts line
-	line.scan(re).each do |word|
-		romfile.each do |raw_line|
-			puts raw_line
-		end	
-	end
-end

projects/mips_sys/tools/irom.vhd.tpl

@@ -1,29 +0,0 @@
--------------------------------------------------------------------------
--- Project: JIPS, a portable 32-bit RISC CPU written in VHDL
--- This file: The ROM file for use in your VHDL design
---
--- Copyright (C) 2008 J. Ahrensfeld
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 3 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see <http://www.gnu.org/licenses/>.
---
--- For questions and ideas, please contact the author at jens@jayfield.org
---
---------------------------------------------------------------------------
-
-LIBRARY ieee;
-use IEEE.STD_LOGIC_1164.ALL;
-USE ieee.numeric_std.ALL;
-
--- ROM_INSERT_HERE
-

projects/mips_sys/tools/irom_ld.vhd.tpl

@@ -1,147 +0,0 @@
--------------------------------------------------------------------------
--- Project: JIPS, a portable 32-bit RISC CPU written in VHDL
--- This file: loadable ROM
---
--- Copyright (C) 2008 J. Ahrensfeld
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation, either version 3 of the License, or
--- (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU General Public License for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with this program.  If not, see <http://www.gnu.org/licenses/>.
---
--- For questions and ideas, please contact the author at jens@jayfield.org
---
---------------------------------------------------------------------------
-
-LIBRARY ieee;
-use IEEE.STD_LOGIC_1164.ALL;
-USE ieee.numeric_std.ALL;
-
-library UNISIM;
-use UNISIM.VComponents.all;
-
-ENTITY irom IS
-	Port (
-		clk			: in  STD_LOGIC;
-		addr		: in  inst_addr_t;
-		dout		: out inst_t
-	);
-	
-END irom;
-
-ARCHITECTURE loadable OF irom IS 
-
-	-- JASM_ROM_INSERT_HERE
-
-	signal jtag_ld_clk		: STD_LOGIC;
-	signal jtag_ld_we		: STD_LOGIC;
-	signal jtag_ld_addr		: unsigned (15 downto 0);
-	signal jtag_ld_dout		: unsigned (31 downto 0);
-	signal jtag_ld_din		: unsigned (31 downto 0);
-	signal bs_rst, bs_sel, bs_shift, bs_tdi, bs_tdo : std_logic;
-	signal bs_capture, bs_clk0, bs_clk1, bs_update0, bs_update1 : std_logic;
-	signal user_regi, user_rego : unsigned (47 downto 0);
-	constant id : unsigned (47 downto 0) := X"DEAD" & X"BEEF" & "X"BABE";
-
-begin
-
---------------------------------------------------------------------------
--- Virtex-4: JTAG Loader
---------------------------------------------------------------------------
-	i00_BUFG : BUFG
-	port map
-	(
-		O => bs_clk1,
-        I => bs_clk0
-	);
-	
-	i01_BUFG : BUFG
-	port map
-	(
-		O => bs_update1,
-        I => bs_update0
-	);
-
-	BSCAN_VIRTEX4_inst1 : BSCAN_VIRTEX4 
-	generic map
-	(
-		JTAG_CHAIN => 1 -- Value to set BSCAN site of device. Possible values: (1,2,3 or 4)
-	)
-	port map 
-	(
-		CAPTURE => bs_capture, -- CAPTURE output from TAP controller
-		DRCK => bs_clk0,       -- Data register output for USER functions
-		RESET => bs_rst,       -- Reset output from TAP controller
-		SEL => bs_sel,         -- USER active output
-		SHIFT => bs_shift,     -- SHIFT output from TAP controller
-		TDI => bs_tdi,        -- TDI output from TAP controller
-		UPDATE => bs_update0,   -- UPDATE output from TAP controller
-		TDO => bs_tdo         -- Data input for USER function
-	);
-
-	jtag_ld_addr <= user_regi(user_regi'left downto jtag_ld_dout'length);
-	jtag_ld_din <= user_regi(jtag_ld_dout'length-1 downto 0);
-	jtag_ld_clk <= bs_update1;
-	jtag_ld_we <= bs_sel;
-	
-sipo:
-	process (bs_rst, bs_clk1, bs_tdi, bs_shift)
-	begin
-		if bs_rst = '1' then
-			user_regi <= (others => '0');
-		elsif rising_edge(bs_clk1) then
-			if bs_shift = '1' then
-				user_regi <= bs_tdi & user_regi(user_regi'left downto 1);
-			end if;
-		end if;
-	end process;	
-
-piso:
-	process (bs_rst, bs_clk1, bs_shift, user_rego)
-	begin
-		bs_tdo <= user_rego(0);
-		if bs_rst = '1' then
-			user_rego <= (others => '0');
-		elsif rising_edge(bs_clk1) then
-			if bs_shift = '1' then
-				user_rego <= user_rego(0) & user_rego(user_rego'left downto 1);
-			else
-				user_rego <= (user_rego'left downto jtag_ld_dout'length => '0') & jtag_ld_dout;	
---				user_rego <= id;	
-			end if;
-		end if;
-	end process;	
-	
-PROM_WRITE: 
-	process(jtag_ld_clk, jtag_ld_we)
-	begin
-		if rising_edge(jtag_ld_clk) then
-			if jtag_ld_we = '1' then
-				imem_rom(to_integer(jtag_ld_addr)) <= jtag_ld_din;
-			else	
-				jtag_ld_dout <= imem_rom(to_integer(jtag_ld_addr));
-			end if;
-		end if;	
-	end process;
-
---------------------------------------------------------------------------
--- ROM Read/Write
---------------------------------------------------------------------------
-PROM_READ: 
-	process(clk)
-	begin
-		if rising_edge(clk) then
-			dout <= imem_rom(to_integer(addr));
-		end if;
-	end process;
-
---------------------------------------------------------------------------
-end loadable;

projects/mips_sys/tools/make

@@ -1,50 +0,0 @@
-#!/bin/sh
-
-# ----------------------------------------------------------------------
-# Project: JCPU, a portable 8-bit RISC CPU written in VHDL
-# This file: rom-file generation for cpu_core
-#
-# Copyright (C) 2007 J. Ahrensfeld
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-# 
-# For questions and ideas, please contact the author at jens@jayfield.org
-#
-# ---------------------------------------------------------------------
-
-TARGET=$2
-DSTDIR=$1
-
-JASM_HOME=/cygdrive/w/vhdl/lib/CPUs/JCpu/tools
-
-$JASM_HOME/jasm.rb $TARGET.jsm
-
-irom_tcl_snippet="$TARGET.irom.tcl.snip"
-irom_vhdl_snippet="$TARGET.irom.vhdl.snip"
-irom_ld_vhdl_snippet="$TARGET.irom_ld.vhdl.snip"
-xrom_tcl_snippet="$TARGET.xrom.tcl.snip"
-xrom_vhdl_snippet="$TARGET.xrom.vhdl.snip"
-xrom_ld_vhdl_snippet="$TARGET.xrom_ld.vhdl.snip"
-
-$JASM_HOME/insrom.rb $irom_vhdl_snippet $JASM_HOME/irom.vhd.tpl >$DSTDIR/$TARGET\_irom.vhdl
-$JASM_HOME/insrom.rb $irom_ld_vhdl_snippet $JASM_HOME/irom_ld.vhd.tpl >$DSTDIR/$TARGET\_irom_ld.vhdl
-
-$JASM_HOME/insrom.rb $xrom_vhdl_snippet $JASM_HOME/xrom.vhd.tpl >$DSTDIR/$TARGET\_xrom.vhdl
-$JASM_HOME/insrom.rb $xrom_ld_vhdl_snippet $JASM_HOME/xrom_ld.vhd.tpl >$DSTDIR/$TARGET\_xrom_ld.vhdl
-
-cat $irom_tcl_snippet > $TARGET.tcl.snip.snip
-cat $xrom_tcl_snippet >> $TARGET.tcl.snip.snip
-$JASM_HOME/insrom.rb $TARGET.tcl.snip.snip $JASM_HOME/rom.tcl.tpl >$TARGET.tcl
-
-rm -f *.snip

projects/mips_sys/tools/rom.tcl.tpl

@@ -1,61 +0,0 @@
-# ----------------------------------------------------------------------
-# Project: JCPU, a portable 8-bit RISC CPU written in VHDL
-# This file: The ROM file for upload to target over JTAG 
-#
-# Copyright (C) 2007 J. Ahrensfeld
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-# 
-# For questions and ideas, please contact the author at jens@jayfield.org
-#
-# ---------------------------------------------------------------------
-
-# ---------------------------------------------------------------------
-# For Chipscope 9.1
-# ---------------------------------------------------------------------
-# Source JTAG/TCL frame work
-cd $env(CHIPSCOPE)\\bin\\nt
-source csejtag.tcl
-
-namespace import ::chipscope::*
-
-# Platform USB Cable
-set PLATFORM_USB_CABLE_ARGS [list "port=USB2" "frequency=6000000"]
-# frequency="24000000 | 12000000 | 6000000 | 3000000 | 1500000 | 750000"
-
-# Create session
-set handle [::chipscope::csejtag_session create 0]
-
-# Open JTAG and lock
-set open_result [::chipscope::csejtag_target open $handle $CSEJTAG_TARGET_PLATFORMUSB 0 $PLATFORM_USB_CABLE_ARGS]
-set lock_result [::chipscope::csejtag_target lock $handle 1000]
-
-set devlist [::chipscope::csejtag_tap autodetect_chain $handle $CSEJTAG_SCAN_DEFAULT]
-
-# Get Device ID
-set devtype "Virtex-4SX"
-set devid 2
-set irlength [::chipscope::csejtag_tap get_irlength $handle $devid]
-set idcode [::chipscope::csejtag_tap get_device_idcode $handle $devid]
-
-set CSE_OP $CSEJTAG_SHIFT_READWRITE
-set CSE_ES $CSEJTAG_RUN_TEST_IDLE
-
-# Write Program
-# JASM_ROM_INSERT_HERE
-
-::chipscope::csejtag_target unlock $handle
-::chipscope::csejtag_target close $handle
-::chipscope::csejtag_session destroy $handle
-exit

projects/mips_sys/tools/src/ramgen.c

@@ -1,385 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#define ARCH_NAME			"data"
-#define ENT_NAME			"ram"
-#define JTAG_ADDR_WIDTH		16
-
-// --------------------------------------------------------------
-void basename(char *pSrc, char *pDst)
-{
-	int i, size;
-
-	size = strlen(pSrc);
-
-	while(pSrc[size] != '.')
-		size--;
-
-	for (i=0; i < size; i++)
-		pDst[i] = pSrc[i];
-
-	pDst[i] = 0;
-
-}
-
-int SaveRAM(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pEntName, int nbits_addr, int nbits_data)
-{
-	FILE *pFileIn, *pFileOut;
-	long start, end;
-	int i, word, filesize, romsize;
-
-	pFileIn = fopen(pFilenameIn, "rb");
-	if (!pFileIn)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameIn);
-		return 1;
-	}
-
-	pFileOut = fopen(pFilenameOut, "wb");
-	if (!pFileOut)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameOut);
-		return 1;
-	}
-
-	fseek(pFileIn, 0, SEEK_SET);
-	start = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_END);
-	end = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_SET);
-
-	filesize = (end-start);
-	romsize = (int)pow(2, nbits_addr+2);
-
-	// -------------------------------------------------------------------------
-	// Header
-
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "LIBRARY IEEE;\n");
-	fprintf(pFileOut, "USE IEEE.STD_LOGIC_1164.ALL;\n");
-	fprintf(pFileOut, "USE IEEE.NUMERIC_STD.ALL;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "ENTITY %s IS\n", ENT_NAME);
-	fprintf(pFileOut, "\tPort\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\t\tclk\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\tce\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\twe\t\t: in  unsigned(%d downto 0);\n", nbits_data/8-1);
-	fprintf(pFileOut, "\t\taddr\t\t: in  unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\t\tdin\t\t: in  unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\t\tdout\t\t: out unsigned(%d downto 0)\n", nbits_data-1);
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "END %s;\n", ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-
-	fprintf(pFileOut, "ARCHITECTURE %s OF %s IS\n", ARCH_NAME, ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "\tconstant depth : natural := %d;\n", romsize/4);
-	fprintf(pFileOut, "\tsubtype word_t is unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\ttype word_array_t is array (0 to %d) of word_t;\n", romsize/4-1);
-
-	fprintf(pFileOut, "\tsignal sram : word_array_t :=\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// ROM part
-	// -------------------------------------------------------------------------
-	for (i=0; i < filesize; i += sizeof(int))
-	{
-		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	word = 0;
-	for (; i < romsize; i += sizeof(int))
-	{
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// Trailer
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "begin\n", ARCH_NAME);
-	fprintf(pFileOut, "\n");
-	fprintf(pFileOut, "RAM_RW:\n", ARCH_NAME);
-	fprintf(pFileOut, "\tprocess(clk)\n");
-	fprintf(pFileOut, "\tvariable index : natural range 0 to depth-1;\n");
-	fprintf(pFileOut, "\tbegin\n");
-	fprintf(pFileOut, "\t\tif rising_edge(clk) and ce = '1' then\n");
-	fprintf(pFileOut, "\t\t\tindex := to_integer(addr(%d downto 2));\n", nbits_addr+1);
-	fprintf(pFileOut, "\t\t\tif we(0) = '1' then\n");
-	fprintf(pFileOut, "\t\t\t\tsram(index)(7 downto 0)\t\t<= din(7 downto 0);\n");
-	fprintf(pFileOut, "\t\t\tend if;\n");
-	fprintf(pFileOut, "\t\t\tif we(1) = '1' then\n");
-	fprintf(pFileOut, "\t\t\t\tsram(index)(15 downto 8)\t<= din(15 downto 8);\n");
-	fprintf(pFileOut, "\t\t\tend if;\n");
-	fprintf(pFileOut, "\t\t\tif we(2) = '1' then\n");
-	fprintf(pFileOut, "\t\t\t\tsram(index)(23 downto 16)\t<= din(23 downto 16);\n");
-	fprintf(pFileOut, "\t\t\tend if;\n");
-	fprintf(pFileOut, "\t\t\tif we(3) = '1' then\n");
-	fprintf(pFileOut, "\t\t\t\tsram(index)(31 downto 24)\t\t<= din(31 downto 24);\n");
-	fprintf(pFileOut, "\t\t\tend if;\n");
-	fprintf(pFileOut, "\t\t\tdout <= sram(index);\n");
-	fprintf(pFileOut, "\t\tend if;\n");
-	fprintf(pFileOut, "\tend process;\n");
-	fprintf(pFileOut, "\n");
-	fprintf(pFileOut, "end %s;\n", ARCH_NAME);
-
-	return 0;
-}
-
-int SaveRAM_V4LD(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pEntName, int nbits_addr, int nbits_data)
-{
-	FILE *pFileIn, *pFileOut;
-	long start, end;
-	int i, word, filesize, romsize;
-
-	char tpl[] = {"--------------------------------------------------------------------------\n-- Virtex-4: JTAG Loader\n--------------------------------------------------------------------------\n\ti00_BUFG : BUFG\n\tport map\n\t(\n\t\tO => bs_clk1,\n        I => bs_clk0\n\t);\n\t\n\ti01_BUFG : BUFG\n\tport map\n\t(\n\t\tO => bs_update1,\n        I => bs_update0\n\t);\n\n\tBSCAN_VIRTEX4_inst1 : BSCAN_VIRTEX4 \n\tgeneric map\n\t(\n\t\tJTAG_CHAIN => 1 -- Value to set BSCAN site of device. Possible values: (1,2,3 or 4)\n\t)\n\tport map \n\t(\n\t\tCAPTURE => bs_capture, -- CAPTURE output from TAP controller\n\t\tDRCK => bs_clk0,       -- Data register output for USER functions\n\t\tRESET => bs_rst,       -- Reset output from TAP controller\n\t\tSEL => bs_sel,         -- USER active output\n\t\tSHIFT => bs_shift,     -- SHIFT output from TAP controller\n\t\tTDI => bs_tdi,        -- TDI output from TAP controller\n\t\tUPDATE => bs_update0,   -- UPDATE output from TAP controller\n\t\tTDO => bs_tdo         -- Data input for USER function\n\t);\n\n\tjtag_ld_addr <= user_regi(user_regi'left downto jtag_ld_dout'length);\n\tjtag_ld_din <= user_regi(jtag_ld_dout'length-1 downto 0);\n\tjtag_ld_clk <= bs_update1;\n\tjtag_ld_we <= bs_sel;\n\t\nsipo:\n\tprocess (bs_rst, bs_clk1, bs_tdi, bs_shift)\n\tbegin\n\t\tif bs_rst = '1' then\n\t\t\tuser_regi <= (others => '0');\n\t\telsif rising_edge(bs_clk1) then\n\t\t\tif bs_shift = '1' then\n\t\t\t\tuser_regi <= bs_tdi & user_regi(user_regi'left downto 1);\n\t\t\tend if;\n\t\tend if;\n\tend process;\t\n\npiso:\n\tprocess (bs_rst, bs_clk1, bs_shift, user_rego)\n\tbegin\n\t\tbs_tdo <= user_rego(0);\n\t\tif bs_rst = '1' then\n\t\t\tuser_rego <= (others => '0');\n\t\telsif rising_edge(bs_clk1) then\n\t\t\tif bs_shift = '1' then\n\t\t\t\tuser_rego <= user_rego(0) & user_rego(user_rego'left downto 1);\n\t\t\telse\n\t\t\t\tuser_rego <= (user_rego'left downto jtag_ld_dout'length => '0') & jtag_ld_dout;\t\n\t\n\t\t\tend if;\n\t\tend if;\n\tend process;\n\n"};
-
-	pFileIn = fopen(pFilenameIn, "rb");
-	if (!pFileIn)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameIn);
-		return 1;
-	}
-
-	pFileOut = fopen(pFilenameOut, "wb");
-	if (!pFileOut)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameOut);
-		return 1;
-	}
-
-	fseek(pFileIn, 0, SEEK_SET);
-	start = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_END);
-	end = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_SET);
-
-	filesize = (end-start);
-	romsize = (int)pow(2, nbits_addr+2);
-
-	// -------------------------------------------------------------------------
-	// Header
-
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "LIBRARY IEEE;\n");
-	fprintf(pFileOut, "USE IEEE.STD_LOGIC_1164.ALL;\n");
-	fprintf(pFileOut, "USE IEEE.NUMERIC_STD.ALL;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "library UNISIM;\n");
-	fprintf(pFileOut, "use UNISIM.VComponents.all;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "ENTITY %s IS\n", ENT_NAME);
-	fprintf(pFileOut, "\tPort\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\t\tclk\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\tce\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\taddr\t\t: in  unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\t\tdout\t\t: out unsigned(%d downto 0)\n", nbits_data-1);
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "END %s;\n", ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-
-	fprintf(pFileOut, "ARCHITECTURE %s OF %s IS\n", ARCH_NAME, ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "\tsubtype word_t is unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\ttype word_array_t is array (0 to %d) of word_t;\n", romsize/4-1);
-
-	fprintf(pFileOut, "\tsignal jtag_ld_clk\t\t: STD_LOGIC;\n");
-	fprintf(pFileOut, "\tsignal jtag_ld_we\t\t: STD_LOGIC;\n");
-	fprintf(pFileOut, "\tsignal jtag_ld_addr\t\t: unsigned (%d downto 0);\n", JTAG_ADDR_WIDTH-1);
-	fprintf(pFileOut, "\tsignal jtag_ld_dout\t\t: unsigned (%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\tsignal jtag_ld_din\t\t: unsigned (%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\tsignal bs_rst, bs_sel, bs_shift, bs_tdi, bs_tdo : std_logic;\n");
-	fprintf(pFileOut, "\tsignal bs_capture, bs_clk0, bs_clk1, bs_update0, bs_update1 : std_logic;\n");
-	fprintf(pFileOut, "\tsignal user_regi, user_rego : unsigned (%d downto 0);\n", 31 + JTAG_ADDR_WIDTH);
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "\tsignal word_array : word_array_t :=\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// ROM part
-	// -------------------------------------------------------------------------
-	for (i=0; i < filesize; i += sizeof(int))
-	{
-		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	word = 0;
-	for (; i < romsize; i += sizeof(int))
-	{
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "begin\n", ARCH_NAME);
-
-	fprintf(pFileOut, "\n");
-	fprintf(pFileOut, "PROM_READ:\n", ARCH_NAME);
-	fprintf(pFileOut, "\tprocess(clk)\n");
-	fprintf(pFileOut, "\tbegin\n");
-	fprintf(pFileOut, "\t\tif rising_edge(clk) and ce = '1' then\n");
-	fprintf(pFileOut, "\t\t\tdout <= word_array(to_integer(addr(%d downto 2)));\n", nbits_addr+1);
-	fprintf(pFileOut, "\t\tend if;\n");
-	fprintf(pFileOut, "\tend process;\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// Trailer
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "\n");
-	fputs(tpl, pFileOut);
-
-	fprintf(pFileOut, "PROM_WRITE:\n", ARCH_NAME);
-	fprintf(pFileOut, "\tprocess(jtag_ld_clk, jtag_ld_we)\n");
-	fprintf(pFileOut, "\tbegin\n");
-	fprintf(pFileOut, "\t\tif rising_edge(jtag_ld_clk) then\n");
-	fprintf(pFileOut, "\t\t\tif jtag_ld_we = '1' then\n");
-	fprintf(pFileOut, "\t\t\t\tword_array(to_integer(jtag_ld_addr(%d downto 0))) <= jtag_ld_din;\n", nbits_addr-1);
-	fprintf(pFileOut, "\t\t\telse\n");
-	fprintf(pFileOut, "\t\t\t\tjtag_ld_dout <= word_array(to_integer(jtag_ld_addr(%d downto 0)));\n", nbits_addr-1);
-	fprintf(pFileOut, "\t\t\tend if;\n");
-	fprintf(pFileOut, "\t\tend if;\n");
-	fprintf(pFileOut, "\tend process;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "end %s;\n", ARCH_NAME);
-	return 0;
-}
-
-int SaveRAM_TCL(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pEntName, int nbits_addr, int nbits_data)
-{
-	FILE *pFileIn, *pFileOut;
-	long start, end;
-	int i, word, word_addr, filesize, romsize;
-	char binstr_addr[33];
-	char binstr_data[33];
-
-	char tpl[] = {"# ---------------------------------------------------------------------\n# For Chipscope 9.1\n# ---------------------------------------------------------------------\n# Source JTAG/TCL frame work\ncd $env(CHIPSCOPE)\\\\bin\\\\nt\nsource csejtag.tcl\n\nnamespace import ::chipscope::*\n\n# Platform USB Cable\nset PLATFORM_USB_CABLE_ARGS [list \"port=USB2\" \"frequency=6000000\"]\n# frequency=\"24000000 | 12000000 | 6000000 | 3000000 | 1500000 | 750000\"\n\n# Create session\nset handle [::chipscope::csejtag_session create 0]\n\n# Open JTAG and lock\nset open_result [::chipscope::csejtag_target open $handle $CSEJTAG_TARGET_PLATFORMUSB 0 $PLATFORM_USB_CABLE_ARGS]\nset lock_result [::chipscope::csejtag_target lock $handle 1000]\n\nset devlist [::chipscope::csejtag_tap autodetect_chain $handle $CSEJTAG_SCAN_DEFAULT]\n\n# Get Device ID\nset devtype \"Virtex-4SX\"\nset devid 2\nset irlength [::chipscope::csejtag_tap get_irlength $handle $devid]\nset idcode [::chipscope::csejtag_tap get_device_idcode $handle $devid]\n\nset CSE_OP $CSEJTAG_SHIFT_READWRITE\nset CSE_ES $CSEJTAG_RUN_TEST_IDLE\n\n# Write Program\n"};
-
-	pFileIn = fopen(pFilenameIn, "rb");
-	if (!pFileIn)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameIn);
-		return 1;
-	}
-
-	pFileOut = fopen(pFilenameOut, "wb");
-	if (!pFileOut)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameOut);
-		return 1;
-	}
-
-	fseek(pFileIn, 0, SEEK_SET);
-	start = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_END);
-	end = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_SET);
-
-	filesize = (end-start);
-	romsize = (int)pow(2, nbits_addr+2);
-
-	// -------------------------------------------------------------------------
-	// Header
-
-	// -------------------------------------------------------------------------
-	fputs(tpl, pFileOut);
-
-	// -------------------------------------------------------------------------
-	// ROM part
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "# Assembled from %s\n", pFilenameIn);
-	fprintf(pFileOut, "# ---------------------------------------------------------------\n");
-	fprintf(pFileOut, "# Shift the USER2 Instruction (b1111000011) into the Instruction Register of FPGA\n");
-	fprintf(pFileOut, "# User 2\n");
-	fprintf(pFileOut, "set result [::chipscope::csejtag_tap shift_device_ir $handle $devid $CSE_OP $CSE_ES 0 $irlength \"3C3\"]\n\n");
-
-	word_addr = 0;
-	for (i=0; i < filesize; i += sizeof(int))
-	{
-		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "::chipscope::csejtag_tap shift_device_dr $handle $devid $CSE_OP $CSE_ES 0 %d \"%4.4X%8.8X\"\n", nbits_data + JTAG_ADDR_WIDTH, word_addr, word);
-		word_addr++;
-	}
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// Trailer
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "::chipscope::csejtag_target unlock $handle\n");
-	fprintf(pFileOut, "::chipscope::csejtag_target close $handle\n");
-	fprintf(pFileOut, "::chipscope::csejtag_session destroy $handle\n");
-	fprintf(pFileOut, "exit\n");
-
-	return 0;
-}
-
-int main(int argc, char *argv[])
-{
-	char *pFilenameIn;
-	char name_prj[1024];
-	char name_rom_tcl[1024];
-	char name_rom[1024];
-	char name_rom_v4ld[1024];
-
-	FILE *pFileIn;
-	int filesize, romsize, nbits_addr, nbits_data;
-	long start, end;
-	int word, i;
-
-	if (argc < 2)
-	{
-		fprintf(stderr, "Usage: ramgen <input file> <num. word address bits>\n");
-		return 1;
-	}
-
-	pFilenameIn = argv[1];
-	if (argc == 3)
-		nbits_addr = atoi(argv[2]);
-
-
-	basename(pFilenameIn, name_prj);
-	sprintf(name_rom, "%s.vhd", name_prj);
-	sprintf(name_rom_v4ld, "%s_ld.vhd", name_prj);
-	sprintf(name_rom_tcl, "%s.tcl", name_prj);
-
-	SaveRAM(pFilenameIn, name_rom, ARCH_NAME, ENT_NAME, nbits_addr, 32);
-//	SaveROM_V4LD(pFilenameIn, name_rom_v4ld, ARCH_NAME, ENT_NAME, nbits_addr, 32);
-	SaveRAM_TCL(pFilenameIn, name_rom_tcl, ARCH_NAME, ENT_NAME, nbits_addr, 32);
-
-
-	return 0;
-}
-

projects/mips_sys/tools/src/romgen.c

@@ -1,368 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#define ARCH_NAME			"data"
-#define ENT_NAME			"rom"
-#define JTAG_ADDR_WIDTH		16
-
-// --------------------------------------------------------------
-void basename(char *pSrc, char *pDst)
-{
-	int i, size;
-
-	size = strlen(pSrc);
-
-	while(pSrc[size] != '.')
-		size--;
-
-	for (i=0; i < size; i++)
-		pDst[i] = pSrc[i];
-
-	pDst[i] = 0;
-
-}
-
-int SaveROM(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pEntName, int nbits_addr, int nbits_data)
-{
-	FILE *pFileIn, *pFileOut;
-	long start, end;
-	int i, word, filesize, romsize;
-
-	pFileIn = fopen(pFilenameIn, "rb");
-	if (!pFileIn)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameIn);
-		return 1;
-	}
-
-	pFileOut = fopen(pFilenameOut, "wb");
-	if (!pFileOut)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameOut);
-		return 1;
-	}
-
-	fseek(pFileIn, 0, SEEK_SET);
-	start = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_END);
-	end = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_SET);
-
-	filesize = (end-start);
-	romsize = (int)pow(2, nbits_addr+2);
-
-	// -------------------------------------------------------------------------
-	// Header
-
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "LIBRARY IEEE;\n");
-	fprintf(pFileOut, "USE IEEE.STD_LOGIC_1164.ALL;\n");
-	fprintf(pFileOut, "USE IEEE.NUMERIC_STD.ALL;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "ENTITY %s IS\n", ENT_NAME);
-	fprintf(pFileOut, "\tPort\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\t\tclk\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\tce\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\taddr\t\t: in  unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\t\tdout\t\t: out unsigned(%d downto 0)\n", nbits_data-1);
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "END %s;\n", ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-
-	fprintf(pFileOut, "ARCHITECTURE %s OF %s IS\n", ARCH_NAME, ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "\tsubtype word_t is unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\ttype word_array_t is array (0 to %d) of word_t;\n", romsize/4-1);
-
-	fprintf(pFileOut, "\tconstant word_array : word_array_t :=\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// ROM part
-	// -------------------------------------------------------------------------
-	for (i=0; i < filesize; i += sizeof(int))
-	{
-		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	word = 0;
-	for (; i < romsize; i += sizeof(int))
-	{
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// Trailer
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "begin\n", ARCH_NAME);
-	fprintf(pFileOut, "\n");
-	fprintf(pFileOut, "PROM_READ:\n", ARCH_NAME);
-	fprintf(pFileOut, "\tprocess(clk)\n");
-	fprintf(pFileOut, "\tbegin\n");
-	fprintf(pFileOut, "\t\tif rising_edge(clk) and ce = '1' then\n");
-	fprintf(pFileOut, "\t\t\tdout <= word_array(to_integer(addr(%d downto 2)));\n", nbits_addr+1);
-	fprintf(pFileOut, "\t\tend if;\n");
-	fprintf(pFileOut, "\tend process;\n");
-	fprintf(pFileOut, "\n");
-	fprintf(pFileOut, "end %s;\n", ARCH_NAME);
-
-	return 0;
-}
-
-int SaveROM_V4LD(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pEntName, int nbits_addr, int nbits_data)
-{
-	FILE *pFileIn, *pFileOut;
-	long start, end;
-	int i, word, filesize, romsize;
-
-	char tpl[] = {"--------------------------------------------------------------------------\n-- Virtex-4: JTAG Loader\n--------------------------------------------------------------------------\n\ti00_BUFG : BUFG\n\tport map\n\t(\n\t\tO => bs_clk1,\n        I => bs_clk0\n\t);\n\t\n\ti01_BUFG : BUFG\n\tport map\n\t(\n\t\tO => bs_update1,\n        I => bs_update0\n\t);\n\n\tBSCAN_VIRTEX4_inst1 : BSCAN_VIRTEX4 \n\tgeneric map\n\t(\n\t\tJTAG_CHAIN => 1 -- Value to set BSCAN site of device. Possible values: (1,2,3 or 4)\n\t)\n\tport map \n\t(\n\t\tCAPTURE => bs_capture, -- CAPTURE output from TAP controller\n\t\tDRCK => bs_clk0,       -- Data register output for USER functions\n\t\tRESET => bs_rst,       -- Reset output from TAP controller\n\t\tSEL => bs_sel,         -- USER active output\n\t\tSHIFT => bs_shift,     -- SHIFT output from TAP controller\n\t\tTDI => bs_tdi,        -- TDI output from TAP controller\n\t\tUPDATE => bs_update0,   -- UPDATE output from TAP controller\n\t\tTDO => bs_tdo         -- Data input for USER function\n\t);\n\n\tjtag_ld_addr <= user_regi(user_regi'left downto jtag_ld_dout'length);\n\tjtag_ld_din <= user_regi(jtag_ld_dout'length-1 downto 0);\n\tjtag_ld_clk <= bs_update1;\n\tjtag_ld_we <= bs_sel;\n\t\nsipo:\n\tprocess (bs_rst, bs_clk1, bs_tdi, bs_shift)\n\tbegin\n\t\tif bs_rst = '1' then\n\t\t\tuser_regi <= (others => '0');\n\t\telsif rising_edge(bs_clk1) then\n\t\t\tif bs_shift = '1' then\n\t\t\t\tuser_regi <= bs_tdi & user_regi(user_regi'left downto 1);\n\t\t\tend if;\n\t\tend if;\n\tend process;\t\n\npiso:\n\tprocess (bs_rst, bs_clk1, bs_shift, user_rego)\n\tbegin\n\t\tbs_tdo <= user_rego(0);\n\t\tif bs_rst = '1' then\n\t\t\tuser_rego <= (others => '0');\n\t\telsif rising_edge(bs_clk1) then\n\t\t\tif bs_shift = '1' then\n\t\t\t\tuser_rego <= user_rego(0) & user_rego(user_rego'left downto 1);\n\t\t\telse\n\t\t\t\tuser_rego <= (user_rego'left downto jtag_ld_dout'length => '0') & jtag_ld_dout;\t\n\t\n\t\t\tend if;\n\t\tend if;\n\tend process;\n\n"};
-
-	pFileIn = fopen(pFilenameIn, "rb");
-	if (!pFileIn)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameIn);
-		return 1;
-	}
-
-	pFileOut = fopen(pFilenameOut, "wb");
-	if (!pFileOut)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameOut);
-		return 1;
-	}
-
-	fseek(pFileIn, 0, SEEK_SET);
-	start = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_END);
-	end = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_SET);
-
-	filesize = (end-start);
-	romsize = (int)pow(2, nbits_addr+2);
-
-	// -------------------------------------------------------------------------
-	// Header
-
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "LIBRARY IEEE;\n");
-	fprintf(pFileOut, "USE IEEE.STD_LOGIC_1164.ALL;\n");
-	fprintf(pFileOut, "USE IEEE.NUMERIC_STD.ALL;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "library UNISIM;\n");
-	fprintf(pFileOut, "use UNISIM.VComponents.all;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "ENTITY %s IS\n", ENT_NAME);
-	fprintf(pFileOut, "\tPort\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\t\tclk\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\tce\t\t: in  STD_LOGIC;\n");
-	fprintf(pFileOut, "\t\taddr\t\t: in  unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\t\tdout\t\t: out unsigned(%d downto 0)\n", nbits_data-1);
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "END %s;\n", ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-
-	fprintf(pFileOut, "ARCHITECTURE %s OF %s IS\n", ARCH_NAME, ENT_NAME);
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "\tsubtype word_t is unsigned(%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\ttype word_array_t is array (0 to %d) of word_t;\n", romsize/4-1);
-
-	fprintf(pFileOut, "\tsignal jtag_ld_clk\t\t: STD_LOGIC;\n");
-	fprintf(pFileOut, "\tsignal jtag_ld_we\t\t: STD_LOGIC;\n");
-	fprintf(pFileOut, "\tsignal jtag_ld_addr\t\t: unsigned (%d downto 0);\n", JTAG_ADDR_WIDTH-1);
-	fprintf(pFileOut, "\tsignal jtag_ld_dout\t\t: unsigned (%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\tsignal jtag_ld_din\t\t: unsigned (%d downto 0);\n", nbits_data-1);
-	fprintf(pFileOut, "\tsignal bs_rst, bs_sel, bs_shift, bs_tdi, bs_tdo : std_logic;\n");
-	fprintf(pFileOut, "\tsignal bs_capture, bs_clk0, bs_clk1, bs_update0, bs_update1 : std_logic;\n");
-	fprintf(pFileOut, "\tsignal user_regi, user_rego : unsigned (%d downto 0);\n", 31 + JTAG_ADDR_WIDTH);
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "\tsignal word_array : word_array_t :=\n");
-	fprintf(pFileOut, "\t(\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// ROM part
-	// -------------------------------------------------------------------------
-	for (i=0; i < filesize; i += sizeof(int))
-	{
-		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	word = 0;
-	for (; i < romsize; i += sizeof(int))
-	{
-		fprintf(pFileOut, "\t\tX\"%8.8X\"", word);
-		if (i < (romsize-sizeof(int)))
-			fprintf(pFileOut, ", -- %8.8X\n", i);
-		else
-			fprintf(pFileOut, "  -- %8.8X\n", i);
-	}
-	fprintf(pFileOut, "\t);\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "begin\n", ARCH_NAME);
-
-	fprintf(pFileOut, "\n");
-	fprintf(pFileOut, "PROM_READ:\n", ARCH_NAME);
-	fprintf(pFileOut, "\tprocess(clk)\n");
-	fprintf(pFileOut, "\tbegin\n");
-	fprintf(pFileOut, "\t\tif rising_edge(clk) and ce = '1' then\n");
-	fprintf(pFileOut, "\t\t\tdout <= word_array(to_integer(addr(%d downto 2)));\n", nbits_addr+1);
-	fprintf(pFileOut, "\t\tend if;\n");
-	fprintf(pFileOut, "\tend process;\n");
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// Trailer
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "\n");
-	fputs(tpl, pFileOut);
-
-	fprintf(pFileOut, "PROM_WRITE:\n", ARCH_NAME);
-	fprintf(pFileOut, "\tprocess(jtag_ld_clk, jtag_ld_we)\n");
-	fprintf(pFileOut, "\tbegin\n");
-	fprintf(pFileOut, "\t\tif rising_edge(jtag_ld_clk) then\n");
-	fprintf(pFileOut, "\t\t\tif jtag_ld_we = '1' then\n");
-	fprintf(pFileOut, "\t\t\t\tword_array(to_integer(jtag_ld_addr(%d downto 0))) <= jtag_ld_din;\n", nbits_addr-1);
-	fprintf(pFileOut, "\t\t\telse\n");
-	fprintf(pFileOut, "\t\t\t\tjtag_ld_dout <= word_array(to_integer(jtag_ld_addr(%d downto 0)));\n", nbits_addr-1);
-	fprintf(pFileOut, "\t\t\tend if;\n");
-	fprintf(pFileOut, "\t\tend if;\n");
-	fprintf(pFileOut, "\tend process;\n");
-	fprintf(pFileOut, "\n");
-
-	fprintf(pFileOut, "end %s;\n", ARCH_NAME);
-	return 0;
-}
-
-int SaveROM_TCL(char *pFilenameIn, char *pFilenameOut, char *pArchName, char *pEntName, int nbits_addr, int nbits_data)
-{
-	FILE *pFileIn, *pFileOut;
-	long start, end;
-	int i, word, word_addr, filesize, romsize;
-	char binstr_addr[33];
-	char binstr_data[33];
-
-	char tpl[] = {"# ---------------------------------------------------------------------\n# For Chipscope 9.1\n# ---------------------------------------------------------------------\n# Source JTAG/TCL frame work\ncd $env(CHIPSCOPE)\\\\bin\\\\nt\nsource csejtag.tcl\n\nnamespace import ::chipscope::*\n\n# Platform USB Cable\nset PLATFORM_USB_CABLE_ARGS [list \"port=USB2\" \"frequency=6000000\"]\n# frequency=\"24000000 | 12000000 | 6000000 | 3000000 | 1500000 | 750000\"\n\n# Create session\nset handle [::chipscope::csejtag_session create 0]\n\n# Open JTAG and lock\nset open_result [::chipscope::csejtag_target open $handle $CSEJTAG_TARGET_PLATFORMUSB 0 $PLATFORM_USB_CABLE_ARGS]\nset lock_result [::chipscope::csejtag_target lock $handle 1000]\n\nset devlist [::chipscope::csejtag_tap autodetect_chain $handle $CSEJTAG_SCAN_DEFAULT]\n\n# Get Device ID\nset devtype \"Virtex-4SX\"\nset devid 2\nset irlength [::chipscope::csejtag_tap get_irlength $handle $devid]\nset idcode [::chipscope::csejtag_tap get_device_idcode $handle $devid]\n\nset CSE_OP $CSEJTAG_SHIFT_READWRITE\nset CSE_ES $CSEJTAG_RUN_TEST_IDLE\n\n# Write Program\n"};
-
-	pFileIn = fopen(pFilenameIn, "rb");
-	if (!pFileIn)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameIn);
-		return 1;
-	}
-
-	pFileOut = fopen(pFilenameOut, "wb");
-	if (!pFileOut)
-	{
-		fprintf(stderr, "Error opening file %s\n", pFilenameOut);
-		return 1;
-	}
-
-	fseek(pFileIn, 0, SEEK_SET);
-	start = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_END);
-	end = ftell(pFileIn);
-	fseek(pFileIn, 0, SEEK_SET);
-
-	filesize = (end-start);
-	romsize = (int)pow(2, nbits_addr+2);
-
-	// -------------------------------------------------------------------------
-	// Header
-
-	// -------------------------------------------------------------------------
-	fputs(tpl, pFileOut);
-
-	// -------------------------------------------------------------------------
-	// ROM part
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "# Assembled from %s\n", pFilenameIn);
-	fprintf(pFileOut, "# ---------------------------------------------------------------\n");
-	fprintf(pFileOut, "# Shift the USER1 Instruction (b1111000010) into the Instruction Register of FPGA\n");
-	fprintf(pFileOut, "# User 1\n");
-	fprintf(pFileOut, "set result [::chipscope::csejtag_tap shift_device_ir $handle $devid $CSE_OP $CSE_ES 0 $irlength \"3C2\"]\n\n");
-
-	word_addr = 0;
-	for (i=0; i < filesize; i += sizeof(int))
-	{
-		fread(&word, 1, sizeof(int), pFileIn);
-		fprintf(pFileOut, "::chipscope::csejtag_tap shift_device_dr $handle $devid $CSE_OP $CSE_ES 0 %d \"%4.4X%8.8X\"\n", nbits_data + JTAG_ADDR_WIDTH, word_addr, word);
-		word_addr++;
-	}
-	fprintf(pFileOut, "\n");
-
-	// -------------------------------------------------------------------------
-	// Trailer
-	// -------------------------------------------------------------------------
-	fprintf(pFileOut, "::chipscope::csejtag_target unlock $handle\n");
-	fprintf(pFileOut, "::chipscope::csejtag_target close $handle\n");
-	fprintf(pFileOut, "::chipscope::csejtag_session destroy $handle\n");
-	fprintf(pFileOut, "exit\n");
-
-	return 0;
-}
-
-int main(int argc, char *argv[])
-{
-	char *pFilenameIn;
-	char name_prj[1024];
-	char name_rom[1024];
-	char name_rom_v4ld[1024];
-	char name_rom_tcl[1024];
-
-	FILE *pFileIn;
-	int filesize, romsize, nbits_addr, nbits_data;
-	long start, end;
-	int word, i;
-
-	if (argc < 2)
-	{
-		fprintf(stderr, "Usage: romgen <input file> <num. word address bits>\n");
-		return 1;
-	}
-
-	pFilenameIn = argv[1];
-	if (argc == 3)
-		nbits_addr = atoi(argv[2]);
-
-
-	basename(pFilenameIn, name_prj);
-	sprintf(name_rom, "%s.vhd", name_prj);
-	sprintf(name_rom_v4ld, "%s_ld.vhd", name_prj);
-	sprintf(name_rom_tcl, "%s.tcl", name_prj);
-
-	SaveROM(pFilenameIn, name_rom, ARCH_NAME, ENT_NAME, nbits_addr, 32);
-	SaveROM_V4LD(pFilenameIn, name_rom_v4ld, ARCH_NAME, ENT_NAME, nbits_addr, 32);
-	SaveROM_TCL(pFilenameIn, name_rom_tcl, ARCH_NAME, ENT_NAME, nbits_addr, 32);
-
-
-	return 0;
-}
-