diff options
Diffstat (limited to 'techlibs/xilinx/xc2v_brams_map.v')
-rw-r--r-- | techlibs/xilinx/xc2v_brams_map.v | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/techlibs/xilinx/xc2v_brams_map.v b/techlibs/xilinx/xc2v_brams_map.v new file mode 100644 index 000000000..dc698f956 --- /dev/null +++ b/techlibs/xilinx/xc2v_brams_map.v @@ -0,0 +1,266 @@ +// Virtex 2, Virtex 2 Pro, Spartan 3, Spartan 3E, Spartan 3A block RAM +// mapping (Spartan 3A is a superset of the other four). + +// ------------------------------------------------------------------------ + +module \$__XILINX_RAMB16 (CLK2, CLK3, A1ADDR, A1DATA, A1EN, B1ADDR, B1DATA, B1EN); + parameter CFG_ABITS = 9; + parameter CFG_DBITS = 36; + parameter CFG_ENABLE_B = 1; + + parameter CLKPOL2 = 1; + parameter CLKPOL3 = 1; + parameter [18431:0] INIT = 18432'bx; + + input CLK2; + input CLK3; + + input [CFG_ABITS-1:0] A1ADDR; + output [CFG_DBITS-1:0] A1DATA; + input A1EN; + + input [CFG_ABITS-1:0] B1ADDR; + input [CFG_DBITS-1:0] B1DATA; + input [CFG_ENABLE_B-1:0] B1EN; + + generate if (CFG_DBITS == 1) begin + wire DOB; + RAMB16_S1_S1 #( + `include "brams_init_16.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(1'd0), + .DOA(A1DATA), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(1'b0), + + .DIB(B1DATA), + .DOB(DOB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else if (CFG_DBITS == 2) begin + wire [1:0] DOB; + RAMB16_S2_S2 #( + `include "brams_init_16.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(2'd0), + .DOA(A1DATA), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(1'b0), + + .DIB(B1DATA), + .DOB(DOB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else if (CFG_DBITS == 4) begin + wire [3:0] DOB; + RAMB16_S4_S4 #( + `include "brams_init_16.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(4'd0), + .DOA(A1DATA), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(1'b0), + + .DIB(B1DATA), + .DOB(DOB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else if (CFG_DBITS == 9) begin + wire [7:0] DOB; + wire DOPB; + RAMB16_S9_S9 #( + `include "brams_init_18.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(8'd0), + .DIPA(1'd0), + .DOA(A1DATA[7:0]), + .DOPA(A1DATA[8]), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(1'b0), + + .DIB(B1DATA[7:0]), + .DIPB(B1DATA[8]), + .DOB(DOB), + .DOPB(DOPB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else if (CFG_DBITS == 18) begin + wire [15:0] DOB; + wire [1:0] DOPB; + RAMB16_S18_S18 #( + `include "brams_init_18.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(16'd0), + .DIPA(2'd0), + .DOA({A1DATA[16:9], A1DATA[7:0]}), + .DOPA({A1DATA[17], A1DATA[8]}), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(1'b0), + + .DIB({B1DATA[16:9], B1DATA[7:0]}), + .DIPB({B1DATA[17], B1DATA[8]}), + .DOB(DOB), + .DOPB(DOPB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else if (CFG_DBITS == 36) begin + wire [31:0] DOB; + wire [3:0] DOPB; + RAMB16_S36_S36 #( + `include "brams_init_18.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(32'd0), + .DIPA(4'd0), + .DOA({A1DATA[34:27], A1DATA[25:18], A1DATA[16:9], A1DATA[7:0]}), + .DOPA({A1DATA[35], A1DATA[26], A1DATA[17], A1DATA[8]}), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(1'b0), + + .DIB({B1DATA[34:27], B1DATA[25:18], B1DATA[16:9], B1DATA[7:0]}), + .DIPB({B1DATA[35], B1DATA[26], B1DATA[17], B1DATA[8]}), + .DOB(DOB), + .DOPB(DOPB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else begin + $error("Strange block RAM data width."); + end endgenerate +endmodule + + +// Version with separate byte enables, only available on Spartan 3A. + +module \$__XILINX_RAMB16BWE (CLK2, CLK3, A1ADDR, A1DATA, A1EN, B1ADDR, B1DATA, B1EN); + parameter CFG_ABITS = 9; + parameter CFG_DBITS = 36; + parameter CFG_ENABLE_B = 4; + + parameter CLKPOL2 = 1; + parameter CLKPOL3 = 1; + parameter [18431:0] INIT = 18432'bx; + + input CLK2; + input CLK3; + + input [CFG_ABITS-1:0] A1ADDR; + output [CFG_DBITS-1:0] A1DATA; + input A1EN; + + input [CFG_ABITS-1:0] B1ADDR; + input [CFG_DBITS-1:0] B1DATA; + input [CFG_ENABLE_B-1:0] B1EN; + + generate if (CFG_DBITS == 18) begin + wire [15:0] DOB; + wire [1:0] DOPB; + RAMB16BWE_S18_S18 #( + `include "brams_init_18.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(16'd0), + .DIPA(2'd0), + .DOA({A1DATA[16:9], A1DATA[7:0]}), + .DOPA({A1DATA[17], A1DATA[8]}), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(2'b00), + + .DIB({B1DATA[16:9], B1DATA[7:0]}), + .DIPB({B1DATA[17], B1DATA[8]}), + .DOB(DOB), + .DOPB(DOPB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else if (CFG_DBITS == 36) begin + wire [31:0] DOB; + wire [3:0] DOPB; + RAMB16BWE_S36_S36 #( + `include "brams_init_18.vh" + .WRITE_MODE_A("READ_FIRST"), + .WRITE_MODE_B("READ_FIRST"), + ) _TECHMAP_REPLACE_ ( + .DIA(32'd0), + .DIPA(4'd0), + .DOA({A1DATA[34:27], A1DATA[25:18], A1DATA[16:9], A1DATA[7:0]}), + .DOPA({A1DATA[35], A1DATA[26], A1DATA[17], A1DATA[8]}), + .ADDRA(A1ADDR), + .CLKA(CLK2 ^ !CLKPOL2), + .ENA(A1EN), + .SSRA(|0), + .WEA(4'b0000), + + .DIB({B1DATA[34:27], B1DATA[25:18], B1DATA[16:9], B1DATA[7:0]}), + .DIPB({B1DATA[35], B1DATA[26], B1DATA[17], B1DATA[8]}), + .DOB(DOB), + .DOPB(DOPB), + .ADDRB(B1ADDR), + .CLKB(CLK3 ^ !CLKPOL3), + .ENB(|1), + .SSRB(|0), + .WEB(B1EN) + ); + end else begin + $error("Strange block RAM data width."); + end endgenerate +endmodule |