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Minor update to single-window-target

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This commit is contained in:
Karlis Susters
2023-04-22 10:00:50 +01:00
parent 3953581b50
commit 88fee870d0
1 changed files with 10 additions and 8 deletions
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18
src_Core/RISCY_OOO/coherence/src/Prefetcher.bsv
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@@ -739,17 +739,12 @@ module mkBRAMSingleWindowTargetPrefetcher(Prefetcher) provisos
Reg#(LineAddr) nextToAsk <- mkReg(0);
Reg#(LineAddr) lastChildRequest <- mkReg(0);
TargetTableBRAM#(1024, 128) targetTable <- mkTargetTableBRAM;
FIFOF#(LineAddr) targetTableReadResp <- mkBypassFIFOF;
TargetTableBRAM#(8192, 2048) targetTable <- mkTargetTableBRAM;
Fifo#(1, LineAddr) targetTableReadResp <- mkOverflowBypassFifo;
Reg#(Vector#(numLastRequests, Bit#(32))) lastTargetRequests <- mkReg(replicate(0));
Reg#(Vector#(numLastRequests, Bit#(16))) lastTargetRequests <- mkReg(replicate(0));
rule sendReadReq;
if (!elem(hash(lastChildRequest), lastTargetRequests)) begin
targetTable.readReq(lastChildRequest);
$display("%t Prefetcher sending target read request for %h", $time, lastChildRequest);
lastTargetRequests <= shiftInAt0(lastTargetRequests, hash(lastChildRequest));
end
endrule
rule getReadResp;
@@ -782,6 +777,13 @@ module mkBRAMSingleWindowTargetPrefetcher(Prefetcher) provisos
$display("%t Prefetcher add target entry from addr %h to addr %h", $time, Addr'{lastChildRequest, '0}, addr);
targetTable.writeReq(lastChildRequest, cl);
end
// Send target request if not in last 16 hits.
if (!elem(hash(cl), lastTargetRequests)) begin
targetTable.readReq(cl);
$display("%t Prefetcher sending target read request for %h", $time, cl);
lastTargetRequests <= shiftInAt0(lastTargetRequests, hash(cl));
end
lastChildRequest <= cl;
endmethod