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Diffstat (limited to 'control_lib/ram_wb_harvard.v')
-rw-r--r-- | control_lib/ram_wb_harvard.v | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/control_lib/ram_wb_harvard.v b/control_lib/ram_wb_harvard.v deleted file mode 100644 index c3efc12e0..000000000 --- a/control_lib/ram_wb_harvard.v +++ /dev/null @@ -1,86 +0,0 @@ - -// Dual ported RAM for Harvard architecture processors -// Does no forwarding -// Addresses are byte-oriented, so botton 2 address bits are ignored. FIXME -// AWIDTH of 13 gives 8K bytes. For Spartan 3, if the total RAM size is not a -// multiple of 8K then BRAM space is wasted - -module ram_wb_harvard #(parameter AWIDTH=13) - (input wb_clk_i, - input wb_rst_i, - - input [AWIDTH-1:0] iwb_adr_i, - input [31:0] iwb_dat_i, - output reg [31:0] iwb_dat_o, - input iwb_we_i, - output reg iwb_ack_o, - input iwb_stb_i, - input [3:0] iwb_sel_i, - - input [AWIDTH-1:0] dwb_adr_i, - input [31:0] dwb_dat_i, - output reg [31:0] dwb_dat_o, - input dwb_we_i, - output reg dwb_ack_o, - input dwb_stb_i, - input [3:0] dwb_sel_i); - - reg [7:0] ram0 [0:(1<<(AWIDTH-2))-1]; - reg [7:0] ram1 [0:(1<<(AWIDTH-2))-1]; - reg [7:0] ram2 [0:(1<<(AWIDTH-2))-1]; - reg [7:0] ram3 [0:(1<<(AWIDTH-2))-1]; - - // Instruction Read Port - always @(posedge wb_clk_i) - iwb_ack_o <= iwb_stb_i & ~iwb_ack_o; - - always @(posedge wb_clk_i) - iwb_dat_o[31:24] <= ram3[iwb_adr_i[AWIDTH-1:2]]; - always @(posedge wb_clk_i) - iwb_dat_o[23:16] <= ram2[iwb_adr_i[AWIDTH-1:2]]; - always @(posedge wb_clk_i) - iwb_dat_o[15:8] <= ram1[iwb_adr_i[AWIDTH-1:2]]; - always @(posedge wb_clk_i) - iwb_dat_o[7:0] <= ram0[iwb_adr_i[AWIDTH-1:2]]; - - always @(posedge wb_clk_i) - if(iwb_we_i & iwb_stb_i & iwb_sel_i[3]) - ram3[iwb_adr_i[AWIDTH-1:2]] <= iwb_dat_i[31:24]; - always @(posedge wb_clk_i) - if(iwb_we_i & iwb_stb_i & iwb_sel_i[2]) - ram2[iwb_adr_i[AWIDTH-1:2]] <= iwb_dat_i[23:16]; - always @(posedge wb_clk_i) - if(iwb_we_i & iwb_stb_i & iwb_sel_i[1]) - ram1[iwb_adr_i[AWIDTH-1:2]] <= iwb_dat_i[15:8]; - always @(posedge wb_clk_i) - if(iwb_we_i & iwb_stb_i & iwb_sel_i[0]) - ram0[iwb_adr_i[AWIDTH-1:2]] <= iwb_dat_i[7:0]; - - // Data Port - always @(posedge wb_clk_i) - dwb_ack_o <= dwb_stb_i & ~dwb_ack_o; - - always @(posedge wb_clk_i) - dwb_dat_o[31:24] <= ram3[dwb_adr_i[AWIDTH-1:2]]; - always @(posedge wb_clk_i) - dwb_dat_o[23:16] <= ram2[dwb_adr_i[AWIDTH-1:2]]; - always @(posedge wb_clk_i) - dwb_dat_o[15:8] <= ram1[dwb_adr_i[AWIDTH-1:2]]; - always @(posedge wb_clk_i) - dwb_dat_o[7:0] <= ram0[dwb_adr_i[AWIDTH-1:2]]; - - always @(posedge wb_clk_i) - if(dwb_we_i & dwb_stb_i & dwb_sel_i[3]) - ram3[dwb_adr_i[AWIDTH-1:2]] <= dwb_dat_i[31:24]; - always @(posedge wb_clk_i) - if(dwb_we_i & dwb_stb_i & dwb_sel_i[2]) - ram2[dwb_adr_i[AWIDTH-1:2]] <= dwb_dat_i[23:16]; - always @(posedge wb_clk_i) - if(dwb_we_i & dwb_stb_i & dwb_sel_i[1]) - ram1[dwb_adr_i[AWIDTH-1:2]] <= dwb_dat_i[15:8]; - always @(posedge wb_clk_i) - if(dwb_we_i & dwb_stb_i & dwb_sel_i[0]) - ram0[dwb_adr_i[AWIDTH-1:2]] <= dwb_dat_i[7:0]; - -endmodule // ram_wb_harvard - |