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Sutble bug in the cacheway logic for cacheline invalidation.

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This commit is contained in:
Rose Thompson 2023-11-27 01:27:09 -06:00
parent d918791a60
commit d7ef490c12
1 changed files with 4 additions and 2 deletions
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6
src/cache/cacheway.sv vendored
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@ -68,7 +68,7 @@ module cacheway import cvw::*; #(parameter cvw_t P,
logic SelTag; logic SelTag;
logic SelectedWriteWordEn; logic SelectedWriteWordEn;
logic [LINELEN/8-1:0] FinalByteMask; logic [LINELEN/8-1:0] FinalByteMask;
logic SetValidEN; logic SetValidEN, ClearValidEN;
logic SetValidWay; logic SetValidWay;
logic ClearValidWay; logic ClearValidWay;
logic SetDirtyWay; logic SetDirtyWay;
@ -102,6 +102,7 @@ module cacheway import cvw::*; #(parameter cvw_t P,
assign ClearDirtyWay = ClearDirty & SelData; assign ClearDirtyWay = ClearDirty & SelData;
assign SelectedWriteWordEn = (SetValidWay | SetDirtyWay) & ~FlushStage; // exclusion-tag: icache SelectedWiteWordEn assign SelectedWriteWordEn = (SetValidWay | SetDirtyWay) & ~FlushStage; // exclusion-tag: icache SelectedWiteWordEn
assign SetValidEN = SetValidWay & ~FlushStage; // exclusion-tag: cache SetValidEN assign SetValidEN = SetValidWay & ~FlushStage; // exclusion-tag: cache SetValidEN
assign ClearValidEN = ClearValidWay & ~FlushStage; // exclusion-tag: cache SetValidEN
// If writing the whole line set all write enables to 1, else only set the correct word. // If writing the whole line set all write enables to 1, else only set the correct word.
assign FinalByteMask = SetValidWay ? '1 : LineByteMask; // OR assign FinalByteMask = SetValidWay ? '1 : LineByteMask; // OR
@ -156,7 +157,8 @@ module cacheway import cvw::*; #(parameter cvw_t P,
if(CacheEn) begin if(CacheEn) begin
ValidWay <= #1 ValidBits[CacheSet]; ValidWay <= #1 ValidBits[CacheSet];
if(InvalidateCache) ValidBits <= #1 '0; // exclusion-tag: dcache invalidateway if(InvalidateCache) ValidBits <= #1 '0; // exclusion-tag: dcache invalidateway
else if (SetValidEN | (ClearValidWay & ~FlushStage)) ValidBits[CacheSet] <= #1 SetValidWay; else if (SetValidEN) ValidBits[CacheSet] <= #1 SetValidWay;
else if (ClearValidEN) ValidBits[CacheSet] <= #1 '0;
end end
end end