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Clean up warnings from Questa

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This commit is contained in:
David Harris 2023-01-17 13:43:39 -08:00
parent 4a01ebd4d9
commit fd52915f3c
7 changed files with 53 additions and 53 deletions
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3
pipelined/regression/makefile-memfile
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@ -5,7 +5,8 @@ WALLYDIR:= $(ROOT)/tests/wally-riscv-arch-test
# IMPERASDIR := $(ROOT)/tests/imperas-riscv-tests
# ALLDIRS := $(ARCHDIR)/$(SUFFIX) $(WALLYDIR)/$(SUFFIX) $(IMPERASDIR)/$(SUFFIX)
IMPERASDIR := $(ROOT)/tests/imperas-riscv-tests
ALLDIRS := $(ARCHDIR)/$(SUFFIX) $(WALLYDIR)/$(SUFFIX)
#ALLDIRS := $(ARCHDIR)/$(SUFFIX) $(WALLYDIR)/$(SUFFIX)
ALLDIRS := $(ARCHDIR)/$(SUFFIX)
ELFFILES ?= $(shell find $(ALLDIRS) -type f -regex ".*\.elf")
OBJDUMPFILES ?= $(shell find $(ALLDIRS) -type f -regex ".*\.elf.objdump")

15
pipelined/src/mmu/hptw.sv
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@ -98,7 +98,6 @@ module hptw (
logic [2:0] HPTWSize; // 32 or 64 bit access
(* mark_debug = "true" *) statetype WalkerState, NextWalkerState, InitialWalkerState;
// map hptw access faults onto either the original LSU load/store fault or instruction access fault
assign LoadAccessFaultM = WalkerState == IDLE ? LSULoadAccessFaultM : (LSULoadAccessFaultM | LSUStoreAmoAccessFaultM) & DTLBWalk & MemRWM[1] & ~MemRWM[0];
assign StoreAmoAccessFaultM = WalkerState == IDLE ? LSUStoreAmoAccessFaultM : (LSULoadAccessFaultM | LSUStoreAmoAccessFaultM) & DTLBWalk & MemRWM[0];
@ -189,13 +188,13 @@ module hptw (
// FSM to track PageType based on the levels of the page table traversed
flopr #(2) PageTypeReg(clk, reset, NextPageType, PageType);
always_comb
case (WalkerState)
L3_RD: NextPageType = 2'b11; // terapage
L2_RD: NextPageType = 2'b10; // gigapage
L1_RD: NextPageType = 2'b01; // megapage
L0_RD: NextPageType = 2'b00; // kilopage
default: NextPageType = PageType;
endcase
case (WalkerState)
L3_RD: NextPageType = 2'b11; // terapage
L2_RD: NextPageType = 2'b10; // gigapage
L1_RD: NextPageType = 2'b01; // megapage
L0_RD: NextPageType = 2'b00; // kilopage
default: NextPageType = PageType;
endcase
// HPTWAdr muxing
if (`XLEN==32) begin // RV32

14
pipelined/src/mmu/mmu.sv
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@ -107,16 +107,10 @@ module mmu #(parameter TLB_ENTRIES = 8, IMMU = 0) (
.Cacheable, .Idempotent, .SelTIM,
.PMAInstrAccessFaultF, .PMALoadAccessFaultM, .PMAStoreAmoAccessFaultM);
if (`PMP_ENTRIES > 0) // instantiate PMP
pmpchecker pmpchecker(.PhysicalAddress, .PrivilegeModeW,
.PMPCFG_ARRAY_REGW, .PMPADDR_ARRAY_REGW,
.ExecuteAccessF, .WriteAccessM, .ReadAccessM,
.PMPInstrAccessFaultF, .PMPLoadAccessFaultM, .PMPStoreAmoAccessFaultM);
else begin
assign PMPInstrAccessFaultF = 0;
assign PMPLoadAccessFaultM = 0;
assign PMPStoreAmoAccessFaultM = 0;
end
pmpchecker pmpchecker(.PhysicalAddress, .PrivilegeModeW,
.PMPCFG_ARRAY_REGW, .PMPADDR_ARRAY_REGW,
.ExecuteAccessF, .WriteAccessM, .ReadAccessM,
.PMPInstrAccessFaultF, .PMPLoadAccessFaultM, .PMPStoreAmoAccessFaultM);
// Access faults
// If TLB miss and translating we want to not have faults from the PMA and PMP checkers.

46
pipelined/src/mmu/pmpchecker.sv
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@ -49,28 +49,34 @@ module pmpchecker (
output logic PMPStoreAmoAccessFaultM
);
// Bit i is high when the address falls in PMP region i
logic EnforcePMP;
logic [`PMP_ENTRIES-1:0] Match; // physical address matches one of the pmp ranges
logic [`PMP_ENTRIES-1:0] FirstMatch; // onehot encoding for the first pmpaddr to match the current address.
logic [`PMP_ENTRIES-1:0] Active; // PMP register i is non-null
logic [`PMP_ENTRIES-1:0] L, X, W, R; // PMP matches and has flag set
logic [`PMP_ENTRIES-1:0] PAgePMPAdr; // for TOR PMP matching, PhysicalAddress > PMPAdr[i]
if (`PMP_ENTRIES > 0) begin
// Bit i is high when the address falls in PMP region i
logic EnforcePMP;
logic [`PMP_ENTRIES-1:0] Match; // physical address matches one of the pmp ranges
logic [`PMP_ENTRIES-1:0] FirstMatch; // onehot encoding for the first pmpaddr to match the current address.
logic [`PMP_ENTRIES-1:0] Active; // PMP register i is non-null
logic [`PMP_ENTRIES-1:0] L, X, W, R; // PMP matches and has flag set
logic [`PMP_ENTRIES-1:0] PAgePMPAdr; // for TOR PMP matching, PhysicalAddress > PMPAdr[i]
pmpadrdec pmpadrdecs[`PMP_ENTRIES-1:0](
.PhysicalAddress,
.PMPCfg(PMPCFG_ARRAY_REGW),
.PMPAdr(PMPADDR_ARRAY_REGW),
.PAgePMPAdrIn({PAgePMPAdr[`PMP_ENTRIES-2:0], 1'b1}),
.PAgePMPAdrOut(PAgePMPAdr),
.Match, .Active, .L, .X, .W, .R);
pmpadrdec pmpadrdecs[`PMP_ENTRIES-1:0](
.PhysicalAddress,
.PMPCfg(PMPCFG_ARRAY_REGW),
.PMPAdr(PMPADDR_ARRAY_REGW),
.PAgePMPAdrIn({PAgePMPAdr[`PMP_ENTRIES-2:0], 1'b1}),
.PAgePMPAdrOut(PAgePMPAdr),
.Match, .Active, .L, .X, .W, .R);
priorityonehot #(`PMP_ENTRIES) pmppriority(.a(Match), .y(FirstMatch)); // combine the match signal from all the adress decoders to find the first one that matches.
priorityonehot #(`PMP_ENTRIES) pmppriority(.a(Match), .y(FirstMatch)); // combine the match signal from all the adress decoders to find the first one that matches.
// Only enforce PMP checking for S and U modes when at least one PMP is active or in Machine mode when L bit is set in selected region
assign EnforcePMP = (PrivilegeModeW == `M_MODE) ? |(L & FirstMatch) : |Active;
// Only enforce PMP checking for S and U modes when at least one PMP is active or in Machine mode when L bit is set in selected region
assign EnforcePMP = (PrivilegeModeW == `M_MODE) ? |(L & FirstMatch) : |Active;
assign PMPInstrAccessFaultF = EnforcePMP & ExecuteAccessF & ~|(X & FirstMatch) ;
assign PMPStoreAmoAccessFaultM = EnforcePMP & WriteAccessM & ~|(W & FirstMatch) ;
assign PMPLoadAccessFaultM = EnforcePMP & ReadAccessM & ~|(R & FirstMatch) ;
assign PMPInstrAccessFaultF = EnforcePMP & ExecuteAccessF & ~|(X & FirstMatch) ;
assign PMPStoreAmoAccessFaultM = EnforcePMP & WriteAccessM & ~|(W & FirstMatch) ;
assign PMPLoadAccessFaultM = EnforcePMP & ReadAccessM & ~|(R & FirstMatch) ;
end else begin
assign PMPInstrAccessFaultF = 0;
assign PMPStoreAmoAccessFaultM = 0;
assign PMPLoadAccessFaultM = 0;
end
endmodule

8
pipelined/src/mmu/tlbcontrol.sv
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@ -63,12 +63,8 @@ module tlbcontrol #(parameter ITLB = 0) (
// Determine whether TLB is being used
assign TLBAccess = ReadAccess | WriteAccess;
if (`XLEN==64) // Check whether upper bits of 64-bit virtual addressses are all equal
vm64check vm64check(.SATP_MODE, .VAdr, .SV39Mode, .UpperBitsUnequalPageFault);
else begin
assign SV39Mode = 0;
assign UpperBitsUnequalPageFault = 0;
end
// Check that upper bits are legal (all 0s or all 1s)
vm64check vm64check(.SATP_MODE, .VAdr, .SV39Mode, .UpperBitsUnequalPageFault);
// unswizzle useful PTE bits
assign {PTE_D, PTE_A} = PTEAccessBits[7:6];

18
pipelined/src/mmu/vm64check.sv
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@ -35,12 +35,16 @@ module vm64check (
output logic UpperBitsUnequalPageFault
);
logic eq_63_47, eq_46_38;
if (`XLEN == 64) begin
assign SV39Mode = (SATP_MODE == `SV39);
assign SV39Mode = (SATP_MODE == `SV39);
// page fault if upper bits aren't all the same
assign eq_46_38 = &(VAdr[46:38]) | ~|(VAdr[46:38]);
assign eq_63_47 = &(VAdr[63:47]) | ~|(VAdr[63:47]);
assign UpperBitsUnequalPageFault = SV39Mode ? ~(eq_63_47 & eq_46_38) : ~eq_63_47;
// page fault if upper bits aren't all the same
logic eq_63_47, eq_46_38;
assign eq_46_38 = &(VAdr[46:38]) | ~|(VAdr[46:38]);
assign eq_63_47 = &(VAdr[63:47]) | ~|(VAdr[63:47]);
assign UpperBitsUnequalPageFault = SV39Mode ? ~(eq_63_47 & eq_46_38) : ~eq_63_47;
end else begin
assign SV39Mode = 0;
assign UpperBitsUnequalPageFault = 0;
end
endmodule

2
pipelined/testbench/testbench-linux.sv
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@ -155,7 +155,7 @@ module testbench;
`define MCOUNTEREN `CSR_BASE.csrm.mcounteren.MCOUNTERENreg.q
`define SCOUNTEREN `CSR_BASE.csrs.csrs.SCOUNTERENreg.q
`define MSCRATCH `CSR_BASE.csrm.MSCRATCHreg.q
`define SSCRATCH `CSR_BASE.csrs.csrs.csrs.SSCRATCHreg.q
`define SSCRATCH `CSR_BASE.csrs.csrs.SSCRATCHreg.q
`define MTVEC `CSR_BASE.csrm.MTVECreg.q
`define STVEC `CSR_BASE.csrs.csrs.STVECreg.q
`define SATP `CSR_BASE.csrs.csrs.genblk1.SATPreg.q