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No dcache now supported. Does not pass regression tests however.

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This commit is contained in:
Ross Thompson 2021-12-30 15:26:32 -06:00
parent c79e14fec5
commit 6b59c03d1b
2 changed files with 61 additions and 55 deletions
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4
wally-pipelined/src/lsu/lsu.sv
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@ -274,8 +274,8 @@ module lsu
// 2. cache `MEM_DCACHE // 2. cache `MEM_DCACHE
// 3. wire pass-through // 3. wire pass-through
localparam integer WORDSPERLINE = `MEM_DCACHE ? `DCACHE_BLOCKLENINBITS/`XLEN : `XLEN/8; localparam integer WORDSPERLINE = `MEM_DCACHE ? `DCACHE_BLOCKLENINBITS/`XLEN : 1;
localparam integer LOGWPL = $clog2(WORDSPERLINE); localparam integer LOGWPL = `MEM_DCACHE ? $clog2(WORDSPERLINE) : 1;
localparam integer BLOCKLEN = `MEM_DCACHE ? `DCACHE_BLOCKLENINBITS : `XLEN; localparam integer BLOCKLEN = `MEM_DCACHE ? `DCACHE_BLOCKLENINBITS : `XLEN;
localparam integer WordCountThreshold = `MEM_DCACHE ? WORDSPERLINE - 1 : 0; localparam integer WordCountThreshold = `MEM_DCACHE ? WORDSPERLINE - 1 : 0;

112
wally-pipelined/testbench/testbench.sv
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@ -365,68 +365,74 @@ module DCacheFlushFSM
input logic start, input logic start,
output logic done); output logic done);
localparam integer numlines = testbench.dut.hart.lsu.dcache.dcache.NUMLINES;
localparam integer numways = testbench.dut.hart.lsu.dcache.dcache.NUMWAYS;
localparam integer blockbytelen = testbench.dut.hart.lsu.dcache.dcache.BLOCKBYTELEN;
localparam integer numwords = testbench.dut.hart.lsu.dcache.dcache.BLOCKLEN/`XLEN;
localparam integer lognumlines = $clog2(numlines);
localparam integer logblockbytelen = $clog2(blockbytelen);
localparam integer lognumways = $clog2(numways);
localparam integer tagstart = lognumlines + logblockbytelen;
genvar index, way, cacheWord;
logic [`XLEN-1:0] CacheData [numways-1:0] [numlines-1:0] [numwords-1:0];
logic [`XLEN-1:0] CacheTag [numways-1:0] [numlines-1:0] [numwords-1:0];
logic CacheValid [numways-1:0] [numlines-1:0] [numwords-1:0];
logic CacheDirty [numways-1:0] [numlines-1:0] [numwords-1:0];
logic [`PA_BITS-1:0] CacheAdr [numways-1:0] [numlines-1:0] [numwords-1:0];
genvar adr; genvar adr;
logic [`XLEN-1:0] ShadowRAM[`RAM_BASE>>(1+`XLEN/32):(`RAM_RANGE+`RAM_BASE)>>1+(`XLEN/32)]; logic [`XLEN-1:0] ShadowRAM[`RAM_BASE>>(1+`XLEN/32):(`RAM_RANGE+`RAM_BASE)>>1+(`XLEN/32)];
generate generate
for(index = 0; index < numlines; index++) begin if(`MEM_DCACHE) begin
for(way = 0; way < numways; way++) begin localparam integer numlines = testbench.dut.hart.lsu.dcache.dcache.NUMLINES;
for(cacheWord = 0; cacheWord < numwords; cacheWord++) begin localparam integer numways = testbench.dut.hart.lsu.dcache.dcache.NUMWAYS;
copyShadow #(.tagstart(tagstart), localparam integer blockbytelen = testbench.dut.hart.lsu.dcache.dcache.BLOCKBYTELEN;
.logblockbytelen(logblockbytelen)) localparam integer numwords = testbench.dut.hart.lsu.dcache.dcache.BLOCKLEN/`XLEN;
copyShadow(.clk, localparam integer lognumlines = $clog2(numlines);
.start, localparam integer logblockbytelen = $clog2(blockbytelen);
.tag(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].CacheTagMem.StoredData[index]), localparam integer lognumways = $clog2(numways);
.valid(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].ValidBits[index]), localparam integer tagstart = lognumlines + logblockbytelen;
.dirty(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].DirtyBits[index]),
.data(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].word[cacheWord].CacheDataMem.StoredData[index]),
.index(index),
.cacheWord(cacheWord), genvar index, way, cacheWord;
.CacheData(CacheData[way][index][cacheWord]), logic [`XLEN-1:0] CacheData [numways-1:0] [numlines-1:0] [numwords-1:0];
.CacheAdr(CacheAdr[way][index][cacheWord]), logic [`XLEN-1:0] CacheTag [numways-1:0] [numlines-1:0] [numwords-1:0];
.CacheTag(CacheTag[way][index][cacheWord]), logic CacheValid [numways-1:0] [numlines-1:0] [numwords-1:0];
.CacheValid(CacheValid[way][index][cacheWord]), logic CacheDirty [numways-1:0] [numlines-1:0] [numwords-1:0];
.CacheDirty(CacheDirty[way][index][cacheWord])); logic [`PA_BITS-1:0] CacheAdr [numways-1:0] [numlines-1:0] [numwords-1:0];
end for(index = 0; index < numlines; index++) begin
for(way = 0; way < numways; way++) begin
for(cacheWord = 0; cacheWord < numwords; cacheWord++) begin
copyShadow #(.tagstart(tagstart),
.logblockbytelen(logblockbytelen))
copyShadow(.clk,
.start,
.tag(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].CacheTagMem.StoredData[index]),
.valid(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].ValidBits[index]),
.dirty(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].DirtyBits[index]),
.data(testbench.dut.hart.lsu.dcache.dcache.MemWay[way].word[cacheWord].CacheDataMem.StoredData[index]),
.index(index),
.cacheWord(cacheWord),
.CacheData(CacheData[way][index][cacheWord]),
.CacheAdr(CacheAdr[way][index][cacheWord]),
.CacheTag(CacheTag[way][index][cacheWord]),
.CacheValid(CacheValid[way][index][cacheWord]),
.CacheDirty(CacheDirty[way][index][cacheWord]));
end
end
end end
end
integer i, j, k;
always @(posedge clk) begin
if (start) begin #1
#1
for(i = 0; i < numlines; i++) begin
for(j = 0; j < numways; j++) begin
for(k = 0; k < numwords; k++) begin
if (CacheValid[j][i][k] && CacheDirty[j][i][k]) begin
ShadowRAM[CacheAdr[j][i][k] >> $clog2(`XLEN/8)] = CacheData[j][i][k];
end
end
end
end
end
end
end
endgenerate endgenerate
integer i, j, k;
always @(posedge clk) begin
if (start) begin #1
#1
for(i = 0; i < numlines; i++) begin
for(j = 0; j < numways; j++) begin
for(k = 0; k < numwords; k++) begin
if (CacheValid[j][i][k] && CacheDirty[j][i][k]) begin
ShadowRAM[CacheAdr[j][i][k] >> $clog2(`XLEN/8)] = CacheData[j][i][k];
end
end
end
end
end
end
flop #(1) doneReg(.clk(clk), flop #(1) doneReg(.clk(clk),
.d(start), .d(start),