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pipeline refactoring: centralized issue buffer

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This commit is contained in:
Blaise Tine
2020-07-26 11:21:08 -04:00
parent 1f63f9da25
commit 7c86b68977
62 changed files with 923 additions and 820 deletions
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35
hw/rtl/cache/VX_snp_forwarder.v vendored
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@@ -41,8 +41,8 @@ module VX_snp_forwarder #(
reg [`REQS_BITS:0] pending_cntrs [SNRQ_SIZE-1:0];
wire [`LOG2UP(SNRQ_SIZE)-1:0] sfq_write_addr, sfq_read_addr, dbg_sfq_write_addr;
wire sfq_push, sfq_pop, sfq_full;
wire [`LOG2UP(SNRQ_SIZE)-1:0] sfq_write_addr, sfq_read_addr;
wire sfq_acquire, sfq_release, sfq_full;
wire fwdin_valid;
wire [`LOG2UP(SNRQ_SIZE)-1:0] fwdin_tag;
@@ -56,27 +56,26 @@ module VX_snp_forwarder #(
assign sfq_read_addr = fwdin_tag;
assign sfq_push = snp_req_valid && !sfq_full && fwdout_ready;
assign sfq_pop = snp_rsp_valid;
assign sfq_acquire = snp_req_valid && !sfq_full && fwdout_ready;
assign sfq_release = snp_rsp_valid;
VX_index_queue #(
.DATAW (`LOG2UP(SNRQ_SIZE) + 1 +`DRAM_ADDR_WIDTH+SNP_REQ_TAG_WIDTH),
VX_cam_buffer #(
.DATAW (`DRAM_ADDR_WIDTH + 1 + SNP_REQ_TAG_WIDTH),
.SIZE (SNRQ_SIZE)
) snp_fwd_queue (
.clk (clk),
.reset (reset),
.write_data ({snp_req_addr, snp_req_invalidate, snp_req_tag}),
.write_addr (sfq_write_addr),
.push (sfq_push),
.pop (sfq_pop),
.full (sfq_full),
.read_addr (sfq_read_addr),
.read_data ({snp_rsp_addr, snp_rsp_invalidate, snp_rsp_tag}),
`UNUSED_PIN (empty)
) snp_fwd_buffer (
.clk (clk),
.reset (reset),
.write_data ({snp_req_addr, snp_req_invalidate, snp_req_tag}),
.write_addr (sfq_write_addr),
.acquire_slot (sfq_acquire),
.release_slot (sfq_release),
.read_addr (sfq_read_addr),
.read_data ({snp_rsp_addr, snp_rsp_invalidate, snp_rsp_tag}),
.full (sfq_full)
);
always @(posedge clk) begin
if (sfq_push) begin
if (sfq_acquire) begin
pending_cntrs[sfq_write_addr] <= NUM_REQUESTS;
end
if (fwdin_fire) begin