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shared memory optimization

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This commit is contained in:
Blaise Tine
2020-11-29 15:04:31 -08:00
parent b85391389b
commit def6a35693
14 changed files with 351 additions and 291 deletions
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52
hw/rtl/cache/VX_snp_forwarder.v vendored
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@@ -14,21 +14,21 @@ module VX_snp_forwarder #(
// Snoop request
input wire snp_req_valid,
input wire [SRC_ADDR_WIDTH-1:0] snp_req_addr,
input wire snp_req_invalidate,
input wire snp_req_inv,
input wire [SNP_TAG_WIDTH-1:0] snp_req_tag,
output wire snp_req_ready,
// Snoop response
output wire snp_rsp_valid,
output wire [SRC_ADDR_WIDTH-1:0] snp_rsp_addr,
output wire snp_rsp_invalidate,
output wire snp_rsp_inv,
output wire [SNP_TAG_WIDTH-1:0] snp_rsp_tag,
input wire snp_rsp_ready,
// Snoop Forwarding out
output wire [NUM_REQUESTS-1:0] snp_fwdout_valid,
output wire [NUM_REQUESTS-1:0][DST_ADDR_WIDTH-1:0] snp_fwdout_addr,
output wire [NUM_REQUESTS-1:0] snp_fwdout_invalidate,
output wire [NUM_REQUESTS-1:0] snp_fwdout_inv,
output wire [NUM_REQUESTS-1:0][`LOG2UP(SNRQ_SIZE)-1:0] snp_fwdout_tag,
input wire [NUM_REQUESTS-1:0] snp_fwdout_ready,
@@ -70,8 +70,8 @@ module VX_snp_forwarder #(
.write_addr (sfq_write_addr),
.acquire_slot (sfq_acquire),
.read_addr (sfq_read_addr),
.write_data ({snp_req_addr, snp_req_invalidate, snp_req_tag}),
.read_data ({snp_rsp_addr, snp_rsp_invalidate, snp_rsp_tag}),
.write_data ({snp_req_addr, snp_req_inv, snp_req_tag}),
.read_data ({snp_rsp_addr, snp_rsp_inv, snp_rsp_tag}),
.release_addr (sfq_read_addr),
.release_slot (sfq_release),
.full (sfq_full)
@@ -80,14 +80,14 @@ module VX_snp_forwarder #(
wire fwdout_valid;
wire [`LOG2UP(SNRQ_SIZE)-1:0] fwdout_tag;
wire [DST_ADDR_WIDTH-1:0] fwdout_addr;
wire fwdout_invalidate;
wire fwdout_inv;
wire fwdout_ready;
wire dispatch_hold;
if (ADDR_DIFF != 0) begin
reg [`LOG2UP(SNRQ_SIZE)-1:0] fwdout_tag_r;
reg [DST_ADDR_WIDTH-1:0] fwdout_addr_r;
reg fwdout_invalidate_r;
reg fwdout_inv_r;
reg dispatch_hold_r;
always @(posedge clk) begin
@@ -110,21 +110,21 @@ module VX_snp_forwarder #(
end
if (snp_req_valid && snp_req_ready) begin
fwdout_invalidate_r <= snp_req_invalidate;
fwdout_tag_r <= sfq_write_addr;
fwdout_inv_r <= snp_req_inv;
fwdout_tag_r <= sfq_write_addr;
end
end
assign fwdout_valid = dispatch_hold_r || (snp_req_valid && !sfq_full);
assign fwdout_tag = dispatch_hold_r ? fwdout_tag_r : sfq_write_addr;
assign fwdout_addr = dispatch_hold_r ? fwdout_addr_r : {snp_req_addr, ADDR_DIFF'(0)};
assign fwdout_invalidate = dispatch_hold_r ? fwdout_invalidate_r : snp_req_invalidate;
assign dispatch_hold = dispatch_hold_r;
assign fwdout_valid = dispatch_hold_r || (snp_req_valid && !sfq_full);
assign fwdout_tag = dispatch_hold_r ? fwdout_tag_r : sfq_write_addr;
assign fwdout_addr = dispatch_hold_r ? fwdout_addr_r : {snp_req_addr, ADDR_DIFF'(0)};
assign fwdout_inv = dispatch_hold_r ? fwdout_inv_r : snp_req_inv;
assign dispatch_hold= dispatch_hold_r;
end else begin
assign fwdout_valid = snp_req_valid && !sfq_full;
assign fwdout_tag = sfq_write_addr;
assign fwdout_addr = snp_req_addr;
assign fwdout_invalidate = snp_req_invalidate;
assign dispatch_hold = 1'b0;
assign fwdout_valid = snp_req_valid && !sfq_full;
assign fwdout_tag = sfq_write_addr;
assign fwdout_addr = snp_req_addr;
assign fwdout_inv = snp_req_inv;
assign dispatch_hold= 1'b0;
end
always @(posedge clk) begin
@@ -139,10 +139,10 @@ module VX_snp_forwarder #(
reg [NUM_REQUESTS-1:0] snp_fwdout_ready_other;
for (genvar i = 0; i < NUM_REQUESTS; i++) begin
assign snp_fwdout_valid[i] = fwdout_valid && snp_fwdout_ready_other[i];
assign snp_fwdout_addr[i] = fwdout_addr;
assign snp_fwdout_invalidate[i] = fwdout_invalidate;
assign snp_fwdout_tag[i] = fwdout_tag;
assign snp_fwdout_valid[i] = fwdout_valid && snp_fwdout_ready_other[i];
assign snp_fwdout_addr[i] = fwdout_addr;
assign snp_fwdout_inv[i] = fwdout_inv;
assign snp_fwdout_tag[i] = fwdout_tag;
end
always @(*) begin
@@ -201,16 +201,16 @@ module VX_snp_forwarder #(
`ifdef DBG_PRINT_CACHE_SNP
always @(posedge clk) begin
if (snp_req_valid && snp_req_ready) begin
$display("%t: cache%0d snp-fwd-req: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, `TO_FULL_ADDR(snp_req_addr), snp_req_invalidate, snp_req_tag);
$display("%t: cache%0d snp-fwd-req: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, `TO_FULL_ADDR(snp_req_addr), snp_req_inv, snp_req_tag);
end
if (snp_fwdout_valid[0] && snp_fwdout_ready[0]) begin
$display("%t: cache%0d snp-fwd-out: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, `TO_FULL_ADDR(snp_fwdout_addr[0]), snp_fwdout_invalidate[0], snp_fwdout_tag[0]);
$display("%t: cache%0d snp-fwd-out: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, `TO_FULL_ADDR(snp_fwdout_addr[0]), snp_fwdout_inv[0], snp_fwdout_tag[0]);
end
if (fwdin_valid && fwdin_ready) begin
$display("%t: cache%0d snp-fwd-in: tag=%0h", $time, CACHE_ID, fwdin_tag);
end
if (snp_rsp_valid && snp_rsp_ready) begin
$display("%t: cache%0d snp-fwd-rsp: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, snp_rsp_addr, snp_rsp_invalidate, snp_rsp_tag);
$display("%t: cache%0d snp-fwd-rsp: addr=%0h, invalidate=%0d, tag=%0h", $time, CACHE_ID, snp_rsp_addr, snp_rsp_inv, snp_rsp_tag);
end
end
`endif