snooping response handling
This commit is contained in:
Blaise Tine
@@ -15,16 +15,22 @@ module Vortex_Socket (
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input wire dram_req_ready,
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// DRAM response
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input wire dram_rsp_valid,
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input wire[`L3DRAM_LINE_WIDTH-1:0] dram_rsp_data,
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input wire[`L3DRAM_TAG_WIDTH-1:0] dram_rsp_tag,
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input wire dram_rsp_valid,
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input wire[`L3DRAM_LINE_WIDTH-1:0] dram_rsp_data,
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input wire[`L3DRAM_TAG_WIDTH-1:0] dram_rsp_tag,
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output wire dram_rsp_ready,
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// Cache snooping
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input wire snp_req_valid,
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input wire[`L3DRAM_ADDR_WIDTH-1:0] snp_req_addr,
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// Snoop request
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input wire snp_req_valid,
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input wire[`L3DRAM_ADDR_WIDTH-1:0] snp_req_addr,
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input wire[`L3SNP_TAG_WIDTH-1:0] snp_req_tag,
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output wire snp_req_ready,
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// Snoop response
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output wire snp_rsp_valid,
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output wire[`L3SNP_TAG_WIDTH-1:0] snp_rsp_tag,
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input wire snp_rsp_ready,
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// I/O request
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output wire io_req_read,
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output wire io_req_write,
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@@ -66,8 +72,13 @@ module Vortex_Socket (
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.snp_req_valid (snp_req_valid),
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.snp_req_addr (snp_req_addr),
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.snp_req_tag (snp_req_tag),
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.snp_req_ready (snp_req_ready),
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.snp_rsp_valid (snp_rsp_valid),
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.snp_rsp_tag (snp_rsp_tag),
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.snp_rsp_ready (snp_rsp_ready),
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.io_req_read (io_req_read),
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.io_req_write (io_req_write),
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.io_req_addr (io_req_addr),
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@@ -99,9 +110,14 @@ module Vortex_Socket (
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wire[`NUM_CLUSTERS-1:0][`L3DRAM_TAG_WIDTH-1:0] per_cluster_dram_rsp_tag;
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wire[`NUM_CLUSTERS-1:0] per_cluster_dram_rsp_ready;
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wire[`NUM_CLUSTERS-1:0] per_cluster_snp_fwd_valid;
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wire[`NUM_CLUSTERS-1:0][`L3DRAM_ADDR_WIDTH-1:0] per_cluster_snp_fwd_addr;
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wire[`NUM_CLUSTERS-1:0] per_cluster_snp_fwd_ready;
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wire[`NUM_CLUSTERS-1:0] per_cluster_snp_req_valid;
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wire[`NUM_CLUSTERS-1:0][`L2DRAM_ADDR_WIDTH-1:0] per_cluster_snp_req_addr;
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wire[`NUM_CLUSTERS-1:0][`L2SNP_TAG_WIDTH-1:0] per_cluster_snp_req_tag;
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wire[`NUM_CLUSTERS-1:0] per_cluster_snp_req_ready;
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wire[`NUM_CLUSTERS-1:0] per_cluster_snp_rsp_valid;
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wire[`NUM_CLUSTERS-1:0][`L2SNP_TAG_WIDTH-1:0] per_cluster_snp_rsp_tag;
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wire[`NUM_CLUSTERS-1:0] per_cluster_snp_rsp_ready;
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`IGNORE_WARNINGS_BEGIN
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wire[`NUM_CLUSTERS-1:0] per_cluster_io_req_read;
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@@ -118,7 +134,7 @@ module Vortex_Socket (
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wire[`NUM_CLUSTERS-1:0] per_cluster_ebreak;
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genvar i;
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for (i = 0; i < `NUM_CLUSTERS; i=i+1) begin
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for (i = 0; i < `NUM_CLUSTERS; i++) begin
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Vortex_Cluster #(
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.CLUSTER_ID(i)
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) Vortex_Cluster (
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@@ -137,9 +153,14 @@ module Vortex_Socket (
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.dram_rsp_tag (per_cluster_dram_rsp_tag [i]),
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.dram_rsp_ready (per_cluster_dram_rsp_ready [i]),
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.snp_req_valid (per_cluster_snp_fwd_valid [i]),
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.snp_req_addr (per_cluster_snp_fwd_addr [i]),
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.snp_req_ready (per_cluster_snp_fwd_ready [i]),
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.snp_req_valid (per_cluster_snp_req_valid [i]),
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.snp_req_addr (per_cluster_snp_req_addr [i]),
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.snp_req_tag (per_cluster_snp_req_tag [i]),
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.snp_req_ready (per_cluster_snp_req_ready [i]),
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.snp_rsp_valid (per_cluster_snp_rsp_valid [i]),
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.snp_rsp_tag (per_cluster_snp_rsp_tag [i]),
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.snp_rsp_ready (per_cluster_snp_rsp_ready [i]),
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.io_req_read (per_cluster_io_req_read [i]),
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.io_req_write (per_cluster_io_req_write [i]),
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@@ -185,11 +206,16 @@ module Vortex_Socket (
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wire[`L3NUM_REQUESTS-1:0][`L2DRAM_TAG_WIDTH-1:0] l3_core_rsp_tag;
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wire l3_core_rsp_ready;
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wire l3_snp_fwd_valid;
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wire[`L3DRAM_ADDR_WIDTH-1:0] l3_snp_fwd_addr;
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wire l3_snp_fwd_ready;
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wire[`NUM_CLUSTERS-1:0] l3_snp_fwdout_valid;
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wire[`NUM_CLUSTERS-1:0][`L2DRAM_ADDR_WIDTH-1:0] l3_snp_fwdout_addr;
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wire[`NUM_CLUSTERS-1:0][`L2SNP_TAG_WIDTH-1:0] l3_snp_fwdout_tag;
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wire[`NUM_CLUSTERS-1:0] l3_snp_fwdout_ready;
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for (i = 0; i < `L3NUM_REQUESTS; i=i+1) begin
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wire[`NUM_CLUSTERS-1:0] l3_snp_fwdin_valid;
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wire[`NUM_CLUSTERS-1:0][`L2SNP_TAG_WIDTH-1:0] l3_snp_fwdin_tag;
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wire[`NUM_CLUSTERS-1:0] l3_snp_fwdin_ready;
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for (i = 0; i < `L3NUM_REQUESTS; i++) begin
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// Core Request
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assign l3_core_req_valid [i] = (per_cluster_dram_req_read [i] | per_cluster_dram_req_write [i]);
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assign l3_core_req_read [i] = per_cluster_dram_req_read [i] ? `BYTE_EN_LW : `BYTE_EN_NO;
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@@ -203,13 +229,19 @@ module Vortex_Socket (
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assign per_cluster_dram_rsp_data [i] = l3_core_rsp_data [i];
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assign per_cluster_dram_rsp_tag [i] = l3_core_rsp_tag [i];
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// Snoop Forwarding
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assign per_cluster_snp_fwd_valid [i] = l3_snp_fwd_valid && l3_snp_fwd_ready;
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assign per_cluster_snp_fwd_addr [i] = l3_snp_fwd_addr;
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// Snoop Forwarding out
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assign per_cluster_snp_req_valid [i] = l3_snp_fwdout_valid[i];
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assign per_cluster_snp_req_addr [i] = l3_snp_fwdout_addr[i];
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assign per_cluster_snp_req_tag [i] = l3_snp_fwdout_tag[i];
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assign l3_snp_fwdout_ready [i] = per_cluster_snp_req_ready[i];
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// Snoop Forwarding in
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assign l3_snp_fwdin_valid [i] = per_cluster_snp_rsp_valid [i];
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assign l3_snp_fwdin_tag [i] = per_cluster_snp_rsp_tag [i];
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assign per_cluster_snp_rsp_ready [i] = l3_snp_fwdin_ready [i];
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end
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assign l3_core_rsp_ready = (& per_cluster_dram_rsp_ready);
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assign l3_snp_fwd_ready = (& per_cluster_snp_fwd_ready);
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VX_cache #(
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.CACHE_SIZE (`L3CACHE_SIZE),
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@@ -226,7 +258,7 @@ module Vortex_Socket (
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.DWBQ_SIZE (`L3DWBQ_SIZE),
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.DFQQ_SIZE (`L3DFQQ_SIZE),
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.LLVQ_SIZE (`L3LLVQ_SIZE),
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.FFSQ_SIZE (`L3FFSQ_SIZE),
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.SRPQ_SIZE (`L3SRPQ_SIZE),
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.PRFQ_SIZE (`L3PRFQ_SIZE),
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.PRFQ_STRIDE (`L3PRFQ_STRIDE),
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.FILL_INVALIDAOR_SIZE (`L3FILL_INVALIDAOR_SIZE),
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@@ -235,7 +267,10 @@ module Vortex_Socket (
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.SNOOP_FORWARDING (1),
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.CORE_TAG_WIDTH (`L2DRAM_TAG_WIDTH),
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.CORE_TAG_ID_BITS (0),
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.DRAM_TAG_WIDTH (`L3DRAM_TAG_WIDTH)
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.DRAM_TAG_WIDTH (`L3DRAM_TAG_WIDTH),
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.NUM_SNP_REQUESTS (`NUM_CLUSTERS),
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.SNP_REQ_TAG_WIDTH (`L3SNP_TAG_WIDTH),
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.SNP_FWD_TAG_WIDTH (`L2SNP_TAG_WIDTH)
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) gpu_l3cache (
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.clk (clk),
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.reset (reset),
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@@ -272,12 +307,24 @@ module Vortex_Socket (
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// Snoop request
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.snp_req_valid (snp_req_valid),
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.snp_req_addr (snp_req_addr),
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.snp_req_tag (snp_req_tag),
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.snp_req_ready (snp_req_ready),
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// Snoop forwarding
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.snp_fwd_valid (l3_snp_fwd_valid),
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.snp_fwd_addr (l3_snp_fwd_addr),
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.snp_fwd_ready (l3_snp_fwd_ready)
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// Snoop response
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.snp_rsp_valid (snp_rsp_valid),
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.snp_rsp_tag (snp_rsp_tag),
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.snp_rsp_ready (snp_rsp_ready),
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// Snoop forwarding out
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.snp_fwdout_valid (l3_snp_fwdout_valid),
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.snp_fwdout_addr (l3_snp_fwdout_addr),
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.snp_fwdout_tag (l3_snp_fwdout_tag),
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.snp_fwdout_ready (l3_snp_fwdout_ready),
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// Snoop forwarding in
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.snp_fwdin_valid (l3_snp_fwdin_valid),
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.snp_fwdin_tag (l3_snp_fwdin_tag),
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.snp_fwdin_ready (l3_snp_fwdin_ready)
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);
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end
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