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Minor simplification of cacheway way selection muxes.

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This commit is contained in:
Ross Thompson 2022-12-09 16:42:05 -06:00
parent 033f844d09
commit 38adcb5b17
2 changed files with 16 additions and 3 deletions
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2
pipelined/src/cache/cache.sv vendored
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@ -174,7 +174,7 @@ module cache #(parameter LINELEN, NUMLINES, NUMWAYS, LOGBWPL, WORDLEN, MUXINTE
.d1({Tag, PAdr[SETTOP-1:OFFSETLEN], {OFFSETLEN{1'b0}}}), .d1({Tag, PAdr[SETTOP-1:OFFSETLEN], {OFFSETLEN{1'b0}}}),
.d2({Tag, FlushAdr, {OFFSETLEN{1'b0}}}), .d2({Tag, FlushAdr, {OFFSETLEN{1'b0}}}),
.s({SelFlush, SelEvict}), .y(CacheBusAdr)); .s({SelFlush, SelEvict}), .y(CacheBusAdr));
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////
// Flush address and way generation during flush // Flush address and way generation during flush
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////

17
pipelined/src/cache/cacheway.sv vendored
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@ -77,9 +77,22 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
logic SetDirtyWay; logic SetDirtyWay;
logic ClearDirtyWay; logic ClearDirtyWay;
logic SelectedWay; logic SelectedWay;
logic SelWriteback;
logic SelData;
logic FlushWayEn, VictimWayEn;
assign FlushWayEn = FlushWay & SelFlush;
assign VictimWayEn = VictimWay & SelEvict;
assign SelWriteback = SelFlush | SetValid | SelEvict;
//assign SelWriteback = FlushWay | SetValid | SelEvict;
mux2 #(1) seltagmux(VictimWay, FlushWay, SelFlush, SelTag); mux2 #(1) seltagmux(VictimWay, FlushWay, SelFlush, SelTag);
mux2 #(1) selectedwaymux(HitWay, SelTag, SelFlush | SetValid | SelEvict, SelectedWay); //assign SelTag = VictimWay | FlushWay;
assign SelData = HitWay | FlushWayEn | VictimWayEn;
mux2 #(1) selectedwaymux(HitWay, SelTag, SelWriteback , SelectedWay);
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////
// Write Enable demux // Write Enable demux
@ -133,7 +146,7 @@ module cacheway #(parameter NUMLINES=512, parameter LINELEN = 256, TAGLEN = 26,
end end
// AND portion of distributed read multiplexers // AND portion of distributed read multiplexers
assign ReadDataLineWay = SelectedWay ? ReadDataLine : '0; // AND part of AO mux. assign ReadDataLineWay = SelData ? ReadDataLine : '0; // AND part of AO mux.
///////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////
// Valid Bits // Valid Bits