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Now updates the dtim with the dirty data in the dcache.

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Simulation is showing issues.  It lookslike the cache is not
evicting the correct data.
This commit is contained in:
Ross Thompson 2021-07-12 15:13:27 -05:00
parent 1cc258ade1
commit ecc9b5006e
1 changed files with 27 additions and 19 deletions
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46
wally-pipelined/testbench/testbench-imperas.sv
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@ -1022,12 +1022,35 @@ module DCacheFlushFSM
else CurrState = NextState;
end
integer adr;
integer tag;
integer index;
integer way;
integer word;
logic dirty, valid;
logic [`XLEN-1:0] data;
always_comb begin
case (CurrState)
IDLE: if(start) NextState = READ;
else NextState = IDLE;
READ: begin
force testbench.dut.hart.lsu.dcache.SRAMAdr = count;
index = count / numways;
way = count % numways;
tag = testbench.dut.hart.lsu.dcache.ReadTag[way];
dirty = testbench.dut.hart.lsu.dcache.Dirty[way];
valid = testbench.dut.hart.lsu.dcache.Valid[way];
adr = (tag << tagstart) + (index << logblockbytelen);
data = testbench.dut.hart.lsu.dcache.FinalReadDataWordM;
if (valid & dirty) begin
$display("Index Way Tag V D %03x %d %016x %d %d %016x %016x", index, way, tag, valid, dirty, adr, data);
force dut.uncore.dtim.A = adr;
force dut.uncore.dtim.HWDATA = data;
force dut.uncore.dtim.memwrite = 1;
force dut.uncore.dtim.risingHREADYTim = 1;
end
if(CountFlag) begin
NextState = DONE;
end else begin
@ -1036,6 +1059,10 @@ module DCacheFlushFSM
end
DONE: begin
release testbench.dut.hart.lsu.dcache.SRAMAdr;
release dut.uncore.dtim.A;
release dut.uncore.dtim.HWDATA;
release dut.uncore.dtim.memwrite;
release dut.uncore.dtim.risingHREADYTim;
NextState = DONE;
end
default: NextState = IDLE;
@ -1046,26 +1073,7 @@ module DCacheFlushFSM
assign CntEn = CurrState == READ;
integer adr;
integer tag;
integer index;
integer way;
integer word;
logic dirty, valid;
always_comb begin
if (CurrState == READ) begin
assign index = count / numways;
assign way = count % numways;
assign tag = testbench.dut.hart.lsu.dcache.ReadTag[way];
assign dirty = testbench.dut.hart.lsu.dcache.Dirty[way];
assign valid = testbench.dut.hart.lsu.dcache.Valid[way];
assign adr = tag << (tagstart) + index;
$display("Index Way Tag V D %03x %d %016x %d %d %016x", index, way, tag, valid, dirty, adr);
end
end
endmodule