From c3c42386d89dc5dfdd1d56332b462d4869a706d4 Mon Sep 17 00:00:00 2001 From: Jens Ahrensfeld Date: Sun, 15 Feb 2009 11:09:14 +0000 Subject: [PATCH] - reintroduced explicit 'rag_ram_re' Committed on the Free edition of March Hare Software CVSNT Server. Upgrade to CVS Suite for more features and support: http://march-hare.com/cvsnt/ git-svn-id: http://moon:8086/svn/vhdl/trunk@353 cc03376c-175c-47c8-b038-4cd826a8556b --- lib/CPUs/MIPS/src/core/icache.vhd | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/lib/CPUs/MIPS/src/core/icache.vhd b/lib/CPUs/MIPS/src/core/icache.vhd index 78733f4..534ff3a 100644 --- a/lib/CPUs/MIPS/src/core/icache.vhd +++ b/lib/CPUs/MIPS/src/core/icache.vhd @@ -124,6 +124,7 @@ END COMPONENT; signal tag_ram_data_rd : tag_ram_data_t; signal tag_ram_addr_wr : unsigned(cache_index_width-1 downto 0); signal tag_ram_data_wr : tag_ram_data_t; + signal tag_ram_re : std_logic; signal tag_ram_we : std_logic; signal ram_index_count : natural range 0 to 2**word_index_width-1; @@ -164,7 +165,7 @@ inst_tag_ram : dpram_1w1r clka => CLK_I, clkb => CLK_I, en_a => '1', - en_b => '1', + en_b => tag_ram_re, we_a => tag_ram_we, addr_a => tag_ram_addr_wr, addr_b => tag_ram_addr_rd, @@ -229,6 +230,7 @@ cache_state: CYC_O <= '0'; STB_O <= '0'; data_ram_re <= '0'; + tag_ram_re <= '0'; was_miss <= '0'; data_write <= '0'; tag_ram_addr_wr <= to_unsigned(cache_index_count, cache_index_width); @@ -251,6 +253,7 @@ cache_state: elsif cpu_en = '1' then cpu_reg_en <= '1'; data_ram_re <= '1'; + tag_ram_re <= '1'; end if; end if; when flush => @@ -264,6 +267,7 @@ cache_state: if cpu_en = '1' then cpu_reg_en <= '1'; data_ram_re <= '1'; + tag_ram_re <= '1'; end if; end if; when mem_request => @@ -298,6 +302,7 @@ cache_state: sn <= rd_cache; when rd_cache => + tag_ram_re <= '1'; data_ram_re <= '1'; was_miss <= '1'; sn <= ready;