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Fixed wally64/32priv test hangup.

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The fix for the issue 203 had a lingering bug which did not suppress a bus access if the hptw short circuits on a pma/p fault.
This commit is contained in:
Ross Thompson 2023-04-05 23:13:45 -05:00
parent da9cf02ba0
commit e531b0103e
1 changed files with 1 additions and 1 deletions
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src/mmu/hptw.sv
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@ -288,7 +288,7 @@ module hptw (
default: NextWalkerState = IDLE; // should never be reached default: NextWalkerState = IDLE; // should never be reached
endcase // case (WalkerState) endcase // case (WalkerState)
assign IgnoreRequestTLB = WalkerState == IDLE & TLBMiss; assign IgnoreRequestTLB = (WalkerState == IDLE & TLBMiss) | (LSUAccessFaultM); // RT : 05 April 2023 if hptw request has pmp/a fault suppress bus access.
assign SelHPTW = WalkerState != IDLE; assign SelHPTW = WalkerState != IDLE;
assign HPTWAccessFaultDelay = HPTWLoadAccessFaultDelay | HPTWStoreAmoAccessFaultDelay | HPTWInstrAccessFaultDelay; assign HPTWAccessFaultDelay = HPTWLoadAccessFaultDelay | HPTWStoreAmoAccessFaultDelay | HPTWInstrAccessFaultDelay;
assign HPTWStall = (WalkerState != IDLE) | (WalkerState == IDLE & TLBMiss & ~(HPTWAccessFaultDelay)); assign HPTWStall = (WalkerState != IDLE) | (WalkerState == IDLE & TLBMiss & ~(HPTWAccessFaultDelay));