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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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24
hw/rtl/cache/VX_snp_forwarder.v vendored
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@@ -40,8 +40,7 @@ module VX_snp_forwarder #(
`STATIC_ASSERT(NUM_REQUESTS > 1, "invalid value");
reg [`REQS_BITS:0] pending_cntrs [SNRQ_SIZE-1:0];
reg [`REQS_BITS-1:0] fwdin_sel;
wire [`LOG2UP(SNRQ_SIZE)-1:0] sfq_write_addr, sfq_read_addr, dbg_sfq_write_addr;
wire sfq_push, sfq_pop, sfq_full;
@@ -100,13 +99,18 @@ module VX_snp_forwarder #(
assign snp_req_ready = !sfq_full && fwdout_ready;
always @(posedge clk) begin
if (reset) begin
fwdin_sel <= 0;
end else if (NUM_REQUESTS > 1) begin
fwdin_sel <= fwdin_sel + 1;
end
end
reg [`REQS_BITS-1:0] fwdin_sel;
VX_fixed_arbiter #(
.N(NUM_REQUESTS)
) arbiter (
.clk (clk),
.reset (reset),
.requests (snp_fwdin_valid),
.grant_index (fwdin_sel),
`UNUSED_PIN (grant_valid),
`UNUSED_PIN (grant_onehot)
);
assign fwdin_valid = snp_fwdin_valid[fwdin_sel];
assign fwdin_tag = snp_fwdin_tag[fwdin_sel];
@@ -124,7 +128,7 @@ module VX_snp_forwarder #(
$display("%t: cache%0d snp fwd_out: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, `DRAM_TO_BYTE_ADDR(snp_fwdout_addr[0]), snp_fwdout_invalidate[0], snp_fwdout_tag[0]);
end
if (fwdin_valid && fwdin_ready) begin
$display("%t: cache%0d snp fwd_in[%01d]: tag=%0h", $time, CACHE_ID, fwdin_sel, fwdin_tag);
$display("%t: cache%0d snp fwd_in[%0d]: tag=%0h", $time, CACHE_ID, fwdin_sel, fwdin_tag);
end
if (snp_rsp_valid && snp_rsp_ready) begin
$display("%t: cache%0d snp rsp: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, snp_rsp_addr, snp_rsp_invalidate, snp_rsp_tag);