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- Loading app from Flash instead User ROM

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- Removed User ROM


git-svn-id: http://moon:8086/svn/vhdl/trunk@91 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2008-10-21 18:24:56 +00:00
parent 029bf8eb22
commit c9900e509a
2 changed files with 117 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files
projects/mips_sys/src/mips_sys_sim.vhd
+102 -64
View File
@@ -60,12 +60,6 @@ PORT
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;
@@ -232,6 +226,39 @@ ARCHITECTURE behavior OF mips_sys IS
);
END COMPONENT;
COMPONENT flash_port_wb
GENERIC
(
addr_width : natural := 32;
data_width : natural := 32;
async_timespec : async_timespec_t
);
PORT
(
CLK_I : in STD_LOGIC;
RST_I : in STD_LOGIC;
CYC_I : in STD_LOGIC;
STB_I : in STD_LOGIC;
WE_I : in STD_LOGIC;
ACK_O : out STD_LOGIC;
SRDY_O : out STD_LOGIC;
MRDY_I : in STD_LOGIC;
ADDR_I : in unsigned(31 downto 0);
DAT_I : in unsigned(31 downto 0);
DAT_O : out unsigned(31 downto 0);
port_bsyo : out std_logic;
port_bsyi : in std_logic;
port_a : out unsigned(addr_width-1 downto 0);
port_di : in unsigned(data_width-1 downto 0);
port_do : out unsigned(data_width-1 downto 0);
port_d_drv : out STD_LOGIC;
port_wr : out STD_LOGIC;
port_rd : out STD_LOGIC;
flash_cs : out std_logic;
flash_rst : out std_logic
);
END COMPONENT;
COMPONENT uart_wb
PORT
(
@@ -338,13 +365,19 @@ ARCHITECTURE behavior OF mips_sys IS
signal ADDR_I_usb : unsigned(31 downto 0);
signal ADDR_I_flash : unsigned(31 downto 0);
signal ADDR_I_ssram : unsigned(31 downto 0);
signal flash_a : unsigned(24 downto 0);
signal ssram_a : unsigned(24 downto 0);
signal ssram_clk : std_logic;
signal ssram_a : unsigned(24 downto 0);
signal ssram_do : unsigned(31 downto 0);
signal ssram_oe_n : std_logic;
signal ssram_we_n : std_logic;
signal ssram_d_drv : std_logic;
signal ssram_bsy : std_logic;
signal flash_a : unsigned(24 downto 0);
signal flash_do : unsigned(31 downto 0);
signal flash_oe_n : std_logic;
signal flash_we_n : std_logic;
signal flash_d_drv : std_logic;
signal flash_bsy : std_logic;
-- Arbiter
constant ARB_MAX_MASTER : natural := 2;
@@ -418,11 +451,6 @@ ARCHITECTURE behavior OF mips_sys IS
signal SRDY_O_gpio : std_logic;
signal SDAT_O_gpio : unsigned(31 downto 0);
signal CYC_I_urom : std_logic;
signal ACK_O_urom : std_logic;
signal SRDY_O_urom : std_logic;
signal SDAT_O_urom : unsigned(31 downto 0);
signal CYC_I_uart : std_logic;
signal ACK_O_uart : std_logic;
signal SRDY_O_uart : std_logic;
@@ -447,6 +475,7 @@ ARCHITECTURE behavior OF mips_sys IS
-- DDR SDRAM
constant BURST_LEN : natural := 2;
constant topad : time := 3 ns;
-- attribute rom_style: string;
@@ -454,7 +483,7 @@ ARCHITECTURE behavior OF mips_sys IS
-- attribute rom_style of cpu_cpu_write_fifo_dout: signal is "DISTRIBUTED";
-- attribute rom_style of cpu_read_fifo_dout: signal is "DISTRIBUTED";
type mem_area_t is (mem_dead, mem_urom, mem_flash, mem_ssram, mem_usb, mem_rom, mem_ram, mem_gpio, mem_uart, mem_sdram, mem_vga);
type mem_area_t is (mem_dead, mem_flash, mem_ssram, mem_usb, mem_rom, mem_ram, mem_gpio, mem_uart, mem_sdram, mem_vga);
signal mem_area : mem_area_t;
BEGIN
@@ -471,9 +500,31 @@ BEGIN
ADDR_I_flash <= "0000000" & ADDR_O(25 downto 2) & '0';
ADDR_I_ssram <= ("0000000000000" & ADDR_O(19 downto 2)) & '0';
sys_flash_ssram_a <= flash_a when CYC_I_flash = '1' else ssram_a;
sys_flash_ssram_we_n <= ssram_we_n and flash_we_n;
sys_flash_ssram_oe_n <= ssram_oe_n and flash_oe_n;
sys_flash_ssram_out:
process(clk)
begin
if rising_edge(clk) then
sys_flash_ssram_d <= (others => 'Z') after topad;
sys_flash_ssram_oe_n <= '1';
sys_flash_ssram_we_n <= '1';
if flash_bsy = '1' then
sys_flash_ssram_oe_n <= flash_oe_n;
sys_flash_ssram_we_n <= flash_we_n;
sys_flash_ssram_a <= flash_a after topad;
if flash_d_drv = '1' then
sys_flash_ssram_d <= flash_do after topad;
end if;
elsif ssram_bsy = '1' then
sys_flash_ssram_oe_n <= ssram_oe_n;
sys_flash_ssram_we_n <= ssram_we_n;
sys_flash_ssram_a <= ssram_a after topad;
if ssram_d_drv = '1' then
sys_flash_ssram_d <= ssram_do after topad;
end if;
end if;
end if;
end process;
---------------------------------------------------------------
-- Arbiter
@@ -526,7 +577,7 @@ mem_mux:
begin
mem_area <= mem_dead;
if ADDR_O(31 downto 28) = X"0" then
mem_area <= mem_urom;
mem_area <= mem_flash;
elsif ADDR_O(31 downto 28) = X"A" then
if ADDR_O(27 downto 26) = "00" then
if ADDR_O(17 downto 16) = "00" then
@@ -549,7 +600,7 @@ mem_mux:
mem_area <= mem_ram;
-- mem_area <= mem_ssram;
elsif (ADDR_O(31 downto 28) = X"8" or ADDR_O(30) = '1') then
mem_area <= mem_sdram;
mem_area <= mem_ssram;
end if;
end process;
@@ -557,7 +608,6 @@ signal_mux:
process(mem_area, CYC_O)
begin
CYC_I_urom <= '0';
CYC_I_uart <= '0';
CYC_I_gpio <= '0';
CYC_I_flash <= '0';
@@ -570,9 +620,6 @@ signal_mux:
case mem_area is
when mem_urom =>
CYC_I_urom <= CYC_O;
when mem_gpio =>
CYC_I_gpio <= CYC_O;
@@ -606,28 +653,13 @@ signal_mux:
end process;
sys_user_rom_addr <= ADDR_O;
sys_user_rom_clk <= clk;
sys_user_rom_en <= CYC_I_urom and STB_O;
SDAT_O_urom <= sys_user_rom_din;
SRDY_O_urom <= CYC_I_urom;
urom_ack_register:
process(clk)
begin
if rising_edge(clk) then
ACK_O_urom <= CYC_I_urom and STB_O;
end if;
end process;
------------------------------------------------------------------
SRDY_I <= SRDY_O_flash or SRDY_O_ssram or SRDY_O_usb or SRDY_O_sdram or SRDY_O_ram or SRDY_O_rom or SRDY_O_urom or SRDY_O_uart or SRDY_O_gpio or SRDY_O_vga;
ACK_I <= ACK_O_flash or ACK_O_usb or ACK_O_sdram or ACK_O_ssram or ACK_O_ram or ACK_O_rom or ACK_O_urom or ACK_O_uart or ACK_O_gpio or ACK_O_vga;
SRDY_I <= SRDY_O_flash or SRDY_O_ssram or SRDY_O_usb or SRDY_O_sdram or SRDY_O_ram or SRDY_O_rom or SRDY_O_uart or SRDY_O_gpio or SRDY_O_vga;
ACK_I <= ACK_O_flash or ACK_O_usb or ACK_O_sdram or ACK_O_ssram or ACK_O_ram or ACK_O_rom or ACK_O_uart or ACK_O_gpio or ACK_O_vga;
MDAT_I <= SDAT_O_ssram when CYC_I_ssram = '1' else
SDAT_O_sdram when CYC_I_sdram = '1' else
SDAT_O_ram when CYC_I_ram = '1' else
SDAT_O_rom when CYC_I_rom = '1' else
SDAT_O_urom when CYC_I_urom = '1' else
SDAT_O_flash when CYC_I_flash = '1' else
SDAT_O_usb when CYC_I_usb = '1' else
SDAT_O_uart when CYC_I_uart = '1' else
@@ -722,8 +754,7 @@ inst_gpio_wb : gpio_wb
sys_gpi1 => gpi1
);
inst_flash_port : async_port_wb
inst_flash_port : flash_port_wb
GENERIC MAP
(
addr_width => 25,
@@ -743,12 +774,16 @@ inst_flash_port : async_port_wb
ADDR_I => ADDR_I_flash,
DAT_I => MDAT_O,
DAT_O => SDAT_O_flash,
async_a => flash_a,
async_d => sys_flash_ssram_d,
async_cs => sys_flash_ce,
async_wr => flash_we_n,
async_rd => flash_oe_n,
async_rst => sys_flash_rstn
port_bsyo => flash_bsy,
port_bsyi => ssram_bsy,
port_a => flash_a,
port_di => sys_flash_ssram_d,
port_do => flash_do,
port_d_drv => flash_d_drv,
port_wr => flash_we_n,
port_rd => flash_oe_n,
flash_cs => sys_flash_ce,
flash_rst => sys_flash_rstn
);
inst_usb_port : async_port_wb
@@ -800,8 +835,7 @@ inst_uart_wb : uart_wb
ser_tx => sys_tx
);
inst_ssram_frontend_wb : entity work.ssram_frontend_wb
inst_ssram_port_wb : entity work.ssram_port_wb
GENERIC MAP
(
addr_width => 25,
@@ -827,17 +861,21 @@ inst_ssram_frontend_wb : entity work.ssram_frontend_wb
-- Sync SRAM domain
ssram_clk_o => sys_ssram_clk,
ssram_clk_fb => sys_ssram_clk_fb,
ssram_cke_n => sys_ssram_cke_n,
ssram_ce_n => sys_ssram_ce_n,
ssram_oe_n => ssram_oe_n,
ssram_we_n => ssram_we_n,
ssram_adv => sys_ssram_adv,
ssram_mode => sys_ssram_mode,
ssram_zz => sys_ssram_zz,
ssram_a => ssram_a,
ssram_d => sys_flash_ssram_d,
ssram_dp => sys_ssram_dp,
ssram_bw_n => sys_ssram_bw_n
ssram_cke_n => sys_ssram_cke_n,
ssram_ce_n => sys_ssram_ce_n,
port_bsyo => ssram_bsy,
port_bsyi => flash_bsy,
port_di => sys_flash_ssram_d,
port_do => ssram_do,
port_d_drv => ssram_d_drv,
port_wr => ssram_we_n,
port_rd => ssram_oe_n,
port_a => ssram_a,
ssram_adv => sys_ssram_adv,
ssram_mode => sys_ssram_mode,
ssram_zz => sys_ssram_zz,
ssram_dp => sys_ssram_dp,
ssram_bw_n => sys_ssram_bw_n
);
inst_sdram_ctrl_frontend_wb : entity work.sdram_ctrl_frontend_wb
@@ -906,9 +944,9 @@ inst_vga_frontend : vga_frontend
(
sys_freq => 100E6,
fifo_depth => 2048,
fifo_almost_full_thresh => 1920,
fifo_almost_empty_thresh => 128,
tsvga => ts_vga_testbench
fifo_almost_full_thresh => 1860,
fifo_almost_empty_thresh => 256,
tsvga => ts_vga_800_600_72
)
PORT MAP
(