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Simplified MTVAL logic

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David Harris 2022-05-12 21:36:13 +00:00
parent 14f9f41d2d
commit 072c464dc1
1 changed files with 9 additions and 2 deletions
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11
pipelined/src/privileged/trap.sv
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@ -149,7 +149,14 @@ module trap (
// MTVAL
///////////////////////////////////////////
always_comb
always_comb
case (CauseM)
12, 1, 3: NextFaultMtvalM = PCM; // Instruction page/access faults, breakpoint
2: NextFaultMtvalM = {{(`XLEN-32){1'b0}}, InstrM}; // Illegal instruction fault
0, 4, 6, 13, 15, 5, 7: NextFaultMtvalM = IEUAdrM; // Instruction misaligned, Load/Store Misaligned/page/access faults
default: NextFaultMtvalM = 0; // Ecall, interrupts
endcase
/* always_comb
if (InstrPageFaultM) NextFaultMtvalM = PCM;
else if (InstrAccessFaultM) NextFaultMtvalM = PCM;
else if (IllegalInstrFaultM) NextFaultMtvalM = {{(`XLEN-32){1'b0}}, InstrM};
@ -162,5 +169,5 @@ module trap (
else if (StoreAmoPageFaultM) NextFaultMtvalM = IEUAdrM;
else if (LoadAccessFaultM) NextFaultMtvalM = IEUAdrM;
else if (StoreAmoAccessFaultM) NextFaultMtvalM = IEUAdrM;
else NextFaultMtvalM = 0;
else NextFaultMtvalM = 0; */
endmodule