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Made priority of misalignment depend on ZICCLSM_SUPPORTED and made StoreAmo take prioirty over load faults

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This commit is contained in:
David Harris 2023-12-19 12:51:45 -08:00
parent 6ba3ae662f
commit b0f34a6377
1 changed files with 6 additions and 4 deletions
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10
src/privileged/trap.sv
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@ -112,11 +112,13 @@ module trap import cvw::*; #(parameter cvw_t P) (
// coverage on
else if (BreakpointFaultM) CauseM = 3;
else if (EcallFaultM) CauseM = {2'b10, PrivilegeModeW};
else if (LoadMisalignedFaultM) CauseM = 4;
else if (StoreAmoMisalignedFaultM) CauseM = 6;
else if (LoadPageFaultM) CauseM = 13;
else if (StoreAmoMisalignedFaultM & ~P.ZICCLSM_SUPPORTED) CauseM = 6; // misaligned faults are higher priority if they always are taken
else if (LoadMisalignedFaultM & ~P.ZICCLSM_SUPPORTED) CauseM = 4;
else if (StoreAmoPageFaultM) CauseM = 15;
else if (LoadAccessFaultM) CauseM = 5;
else if (LoadPageFaultM) CauseM = 13;
else if (StoreAmoAccessFaultM) CauseM = 7;
else if (LoadAccessFaultM) CauseM = 5;
else if (StoreAmoMisalignedFaultM & P.ZICCLSM_SUPPORTED) CauseM = 6; // See priority in Privileged Spec 3.1.15
else if (LoadMisalignedFaultM & P.ZICCLSM_SUPPORTED) CauseM = 4;
else CauseM = 0;
endmodule