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Fix error when reading an instruction that crosses a line boundary

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This commit is contained in:
Jarred Allen 2021-03-25 18:47:23 -04:00
parent 7338ddf853
commit c8a88757ab
2 changed files with 4 additions and 1 deletions
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3
wally-pipelined/regression/wave-dos/cache-waves.do
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@ -31,8 +31,11 @@ add wave -hex /testbench/dut/hart/ifu/ic/InstrPAdrF
add wave -hex /testbench/dut/hart/ifu/ic/InstrAckF
add wave -hex /testbench/dut/hart/ifu/ic/controller/ICacheMemWriteData
add wave -hex /testbench/dut/hart/ifu/ic/controller/ICacheMemWritePAdr
add wave -hex /testbench/dut/hart/ifu/ic/controller/MisalignedState
add wave -hex /testbench/dut/hart/ifu/ic/controller/MisalignedHalfInstrF
add wave -divider
add wave -hex /testbench/dut/hart/ifu/PCE
add wave -hex /testbench/dut/hart/ifu/InstrE
add wave /testbench/InstrEName

2
wally-pipelined/src/ifu/icache.sv
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@ -233,7 +233,7 @@ module icachecontroller #(parameter LINESIZE = 256) (
// Machinery to request the correct addresses from main memory
always_comb begin
assign InstrReadF = FetchState & ~EndFetchState;
assign LineAlignedPCPF = {UpperPCPF, LowerPCF[11:OFFSETWIDTH], {OFFSETWIDTH{1'b0}}};
assign LineAlignedPCPF = {ICacheMemReadUpperPAdr, ICacheMemReadLowerAdr[11:OFFSETWIDTH], {OFFSETWIDTH{1'b0}}};
assign InstrPAdrF = LineAlignedPCPF + FetchWordNum*(`XLEN/8);
assign NextFetchWordNum = FetchState ? FetchWordNum+InstrAckF : {LOGWPL+1{1'b0}};
end