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Relocated the misalignment faults.

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This commit is contained in:
Ross Thompson 2022-01-27 16:03:00 -06:00
parent 30cc27e719
commit d15cb64bdf
1 changed files with 5 additions and 7 deletions
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12
pipelined/src/lsu/lsu.sv
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@ -141,22 +141,16 @@ module lsu (
mux2 #(7) funct7mux(Funct7M, 7'b0, SelHPTW, LSUFunct7M);
mux2 #(2) atomicmux(AtomicM, 2'b00, SelHPTW, LSUAtomicM);
mux2 #(12) adremux(IEUAdrE[11:0], HPTWAdr[11:0], SelHPTW, PreLSUAdrE);
// When replaying CPU memory request after PTW select the IEUAdrM for correct address.
assign LSUAdrE = SelReplayCPURequest ? IEUAdrM[11:0] : PreLSUAdrE;
mux2 #(12) replaymux(PreLSUAdrE, IEUAdrM[11:0], SelReplayCPURequest, LSUAdrE); // replay cpu request after hptw.
mux2 #(`PA_BITS) lsupadrmux(IEUAdrExtM[`PA_BITS-1:0], HPTWAdr, SelHPTW, PreLSUPAdrM);
// always block interrupts when using the hardware page table walker.
assign CPUBusy = StallW & ~SelHPTW;
// Specify which type of page fault is occurring
assign DTLBLoadPageFaultM = DTLBPageFaultM & PreLSURWM[1];
assign DTLBStorePageFaultM = DTLBPageFaultM & PreLSURWM[0];
end // if (`MEM_VIRTMEM)
else begin
assign {InterlockStall, SelHPTW, PTE, PageType, DTLBWriteM, ITLBWriteF} = '0;
assign IgnoreRequest = TrapM;
assign {DTLBLoadPageFaultM, DTLBStorePageFaultM} = '0;
assign CPUBusy = StallW;
assign LSUAdrE = PreLSUAdrE; assign LSUFunct3M = Funct3M; assign LSUFunct7M = Funct7M; assign LSUAtomicM = AtomicM;
assign PreLSURWM = MemRWM; assign PreLSUAdrE = IEUAdrE[11:0]; assign PreLSUPAdrM = IEUAdrExtM;
@ -215,11 +209,15 @@ module lsu (
// If the CPU's (not HPTW's) request is a page fault.
assign LoadMisalignedFaultM = DataMisalignedM & MemRWM[1];
assign StoreMisalignedFaultM = DataMisalignedM & MemRWM[0];
// Specify which type of page fault is occurring
assign DTLBLoadPageFaultM = DTLBPageFaultM & PreLSURWM[1];
assign DTLBStorePageFaultM = DTLBPageFaultM & PreLSURWM[0];
end else begin
assign {DTLBMissM, DTLBPageFaultM, LoadAccessFaultM, StoreAccessFaultM, LoadMisalignedFaultM, StoreMisalignedFaultM} = '0;
assign LSUPAdrM = PreLSUPAdrM;
assign CacheableM = 1;
assign {DTLBLoadPageFaultM, DTLBStorePageFaultM} = '0;
end
assign LSUStallM = DCacheStallM | InterlockStall | BusStall;