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microwatt/asic/behavioural/RAM512.v

43 lines
791 B
Coq

module RAM512 #(
parameter BITS=9,
parameter FILENAME="firmware.hex"
) (
`ifdef USE_POWER_PINS
inout VPWR,
inout VGND,
`endif
input CLK,
input [7:0] WE0,
input EN0,
input [63:0] Di0,
output reg [63:0] Do0,
input [BITS-1:0] A0
);
reg [63:0] RAM[2**BITS-1:0];
always @(posedge CLK) begin
if (EN0)
Do0 <= RAM[A0];
else
Do0 <= 64'b0;
end
generate
genvar i;
for (i=0; i<8; i=i+1) begin: BYTE
always @(posedge CLK) begin
if (EN0) begin
if (WE0[i])
RAM[A0][i*8+7:i*8] <= Di0[i*8+7:i*8];
end
end
end
endgenerate
initial begin
$readmemh(FILENAME, RAM);
end
endmodule