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round robin arbiter + auto buffered queue + fixed dcache arbiter

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This commit is contained in:
Blaise Tine
2020-06-20 17:56:04 -04:00
parent 9c157e4929
commit d3440de403
30 changed files with 339 additions and 209 deletions
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19
hw/rtl/VX_mem_arb.v
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@@ -65,13 +65,16 @@ module VX_mem_arb #(
reg [REQS_BITS-1:0] bus_req_sel;
always @(posedge clk) begin
if (reset) begin
bus_req_sel <= 0;
end else begin
bus_req_sel <= bus_req_sel + 1;
end
end
VX_rr_arbiter #(
.N(NUM_REQUESTS)
) arbiter (
.clk (clk),
.reset (reset),
.requests (in_mem_req_valid),
.grant_index (bus_req_sel),
`UNUSED_PIN (grant_valid),
`UNUSED_PIN (grant_onehot)
);
assign out_mem_req_valid = in_mem_req_valid [bus_req_sel];
assign out_mem_req_rw = in_mem_req_rw [bus_req_sel];
@@ -93,7 +96,7 @@ module VX_mem_arb #(
assign in_mem_rsp_data[i] = out_mem_rsp_data;
assign in_mem_rsp_tag[i] = out_mem_rsp_tag[REQS_BITS +: TAG_IN_WIDTH];
end
assign out_mem_rsp_ready = out_mem_rsp_valid ? in_mem_rsp_ready[bus_rsp_sel] : 0;
assign out_mem_rsp_ready = in_mem_rsp_ready[bus_rsp_sel];
end