Towards Xilinx bram support

1 files changed, 59 insertions, 0 deletions

diff --git a/techlibs/xilinx/brams.v b/techlibs/xilinx/brams.v
new file mode 100644
index 00000000..067ca8b2
--- /dev/null
+++ b/techlibs/xilinx/brams.v
@@ -0,0 +1,59 @@
+module \$__XILINX_RAMB36_SDP72 (CLK2, CLK3, A1ADDR, A1DATA, B1ADDR, B1DATA, B1EN);
+	parameter TRANSP2 = 1;
+	parameter CLKPOL2 = 1;
+	parameter CLKPOL3 = 1;
+
+	input CLK2;
+	input CLK3;
+
+	input [8:0] A1ADDR;
+	output [71:0] A1DATA;
+
+	input [8:0] B1ADDR;
+	input [71:0] B1DATA;
+	input [7:0] B1EN;
+
+	wire [15:0] A1ADDR_16 = A1ADDR;
+	wire [15:0] B1ADDR_16 = B1ADDR;
+
+	wire [7:0] DIP, DOP;
+	wire [63:0] DI, DO;
+
+	assign A1DATA = { DOP[7], DO[63:56], DOP[6], DO[55:48], DOP[5], DO[47:40], DOP[4], DO[39:32],
+	                  DOP[3], DO[31:24], DOP[2], DO[23:16], DOP[1], DO[15: 8], DOP[0], DO[ 7: 0] };
+
+	assign { DIP[7], DI[63:56], DIP[6], DI[55:48], DIP[5], DI[47:40], DIP[4], DI[39:32],
+	         DIP[3], DI[31:24], DIP[2], DI[23:16], DIP[1], DI[15: 8], DIP[0], DI[ 7: 0] } = B1DATA;
+
+	RAMB36E1 #(
+		.RAM_MODE("SDP"),
+		.READ_WIDTH_A(72),
+		.WRITE_WIDTH_B(72),
+		.WRITE_MODE_B(TRANSP2 ? "WRITE_FIRST" : "READ_FIRST")
+	) _TECHMAP_REPLACE_ (
+		.DOBDO(DO[63:32]),
+		.DOADO(DO[31:0]),
+		.DOPBDOP(DOP[7:4]),
+		.DOPADOP(DOP[3:0]),
+		.DIBDI(DI[63:32]),
+		.DIADI(DI[31:0]),
+		.DIPBDIP(DIP[7:4]),
+		.DIPADIP(DIP[3:0]),
+
+		.ADDRARDADDR(A1ADDR_16),
+		.CLKARDCLK(CLK2 == |CLKPOL2),
+		.ENARDEN(|1),
+		.REGCEAREGCE(|1),
+		.RSTRAMARSTRAM(|0),
+		.RSTREGARSTREG(|0),
+		.WEA(4'b0),
+
+		.ADDRBWRADDR(B1ADDR_16),
+		.CLKBWRCLK(CLK3 == |CLKPOL3),
+		.ENBWREN(|1),
+		.REGCEB(|0),
+		.RSTRAMB(|0),
+		.RSTREGB(|0),
+		.WEBWE(B1EN)
+	);
+endmodule