From a3904fef4c068d376dacc03e6b9961af10f7cbe6 Mon Sep 17 00:00:00 2001 From: Jens Ahrensfeld Date: Tue, 3 Nov 2009 23:25:06 +0000 Subject: [PATCH] - FIFO-depth of CMD-FIFO is not hardwired anymore. It's set to top-level FIFO-depth 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@592 cc03376c-175c-47c8-b038-4cd826a8556b --- lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend64_wb.vhd | 3 ++- lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend_wb.vhd | 3 ++- lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_top.vhd | 6 +++--- 3 files changed, 7 insertions(+), 5 deletions(-) diff --git a/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend64_wb.vhd b/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend64_wb.vhd index 34a3033..ee98765 100644 --- a/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend64_wb.vhd +++ b/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend64_wb.vhd @@ -204,7 +204,8 @@ begin Generic map ( BL => BL, - f_sysclk => f_sysclk + f_sysclk => f_sysclk, + fifo_depth => fifo_depth ) Port map ( diff --git a/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend_wb.vhd b/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend_wb.vhd index 1273c84..e0d432b 100644 --- a/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend_wb.vhd +++ b/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_frontend_wb.vhd @@ -204,7 +204,8 @@ begin Generic map ( BL => BL, - f_sysclk => f_sysclk + f_sysclk => f_sysclk, + fifo_depth => fifo_depth ) Port map ( diff --git a/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_top.vhd b/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_top.vhd index 1a714e1..a6935ec 100644 --- a/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_top.vhd +++ b/lib/SDRAM/ddr_sdr_v1_5/src/sdram_ctrl_top.vhd @@ -32,7 +32,8 @@ entity sdram_ctrl_top is Generic ( BL : natural := 2; - f_sysclk : natural := 100E6 + f_sysclk : natural := 100E6; + fifo_depth : natural := 3 ); Port ( @@ -96,7 +97,6 @@ architecture rtl of sdram_ctrl_top is -- SD command FIFO - constant CMD_FIFO_ADDR_WIDTH : positive := 5; -- lower than 3 won't give sustained throuhput (for sys_clk == sdram_clk) constant CMD_FIFO_DATA_WIDTH : positive := user_tag_t'length + 4 + mode_word_t'length + col_addr_t'length; signal cmd_fifo_din : unsigned(CMD_FIFO_DATA_WIDTH-1 downto 0); signal cmd_fifo_dout : unsigned(CMD_FIFO_DATA_WIDTH-1 downto 0); @@ -166,7 +166,7 @@ begin inst_sd_cmd_fifo: entity work.fifo_async GENERIC MAP ( - addr_width => CMD_FIFO_ADDR_WIDTH, + addr_width => fifo_depth, data_width => CMD_FIFO_DATA_WIDTH ) PORT MAP