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`include "cache/defs.sv"
module cache_sram
(
input logic clk,
rst_n,
input addr_index index_rd,
index_wr,
input logic write_data,
write_state,
input addr_tag tag_wr,
input line data_wr,
input line_state state_wr,
output addr_tag tag_rd,
output line data_rd,
output line_state state_rd
);
// Existe un mito que habla de true dual-ports con byte-enables, dudo mucho que sea real:
// https://www.intel.com/content/www/us/en/docs/programmable/683082/21-3/ram-with-byte-enable-signals.html
localparam DEPTH = 1 << $bits(addr_index);
line data_file[DEPTH];
addr_tag tag_file[DEPTH];
line_state state_file[DEPTH];
always_ff @(posedge clk) begin
if (write_data) begin
tag_file[index_wr] <= tag_wr;
data_file[index_wr] <= data_wr;
end
if (write_state)
state_file[index_wr] <= state_wr;
tag_rd <= tag_file[index_rd];
data_rd <= data_file[index_rd];
state_rd <= state_file[index_rd];
end
//FIXME: rst_n para state_file?
initial
for (int i = 0; i < DEPTH; ++i)
state_file[i] = INVALID;
endmodule
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