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Removed NonIROM and NonDTIM select signals from IFU and LSU.

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This commit is contained in:
Ross Thompson 2022-09-17 22:01:03 -05:00
parent cb34b7c98f
commit 57c366c1b2
2 changed files with 8 additions and 17 deletions
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15
pipelined/src/ifu/ifu.sv
View File

@ -92,7 +92,7 @@ module ifu (
logic CompressedF;
logic [31:0] InstrRawD, InstrRawF;
logic [31:0] FinalInstrRawF;
logic [1:0] NonIROMMemRWM;
logic [1:0] RWF;
logic [31:0] InstrE;
logic [`XLEN-1:0] PCD;
@ -113,7 +113,6 @@ module ifu (
logic BusStall;
logic ICacheStallF, IFUCacheBusStallF;
logic CPUBusy;
logic SelIROM;
(* mark_debug = "true" *) logic [31:0] PostSpillInstrRawF;
// branch predictor signal
logic [`XLEN-1:0] PCNext1F, PCNext2F, PCNext0F;
@ -193,13 +192,11 @@ module ifu (
assign IROMAdr = CPUBusy | reset ? PCFSpill : PCNextFSpill; // zero extend or contract to PA_BITS
/* verilator lint_on WIDTH */
adrdec iromdec(PCFExt, `IROM_BASE, `IROM_RANGE, `IROM_SUPPORTED, 1'b1, 2'b10, 4'b1111, SelIROM);
//assign NonIROMMemRWM = {~SelIROM, 1'b0};
assign NonIROMMemRWM = 2'b10;
assign RWF = 2'b10;
irom irom(.clk, .reset, .Adr(CPUBusy | reset ? PCFSpill : PCNextFSpill), .ReadData(FinalInstrRawF));
end else begin
assign SelIROM = 0; assign NonIROMMemRWM = 2'b10;
assign RWF = 2'b10;
end
if (`BUS) begin : bus
localparam integer WORDSPERLINE = `ICACHE ? `ICACHE_LINELENINBITS/`XLEN : 1;
@ -213,7 +210,7 @@ module ifu (
logic [1:0] CacheRW, RW;
assign CacheRW = {ICacheFetchLine, 1'b0} & ~{ITLBMissF, ITLBMissF};
assign RW = NonIROMMemRWM & ~{ITLBMissF, ITLBMissF} & ~{CacheableF, CacheableF};
assign RW = RWF & ~{ITLBMissF, ITLBMissF} & ~{CacheableF, CacheableF};
cache #(.LINELEN(`ICACHE_LINELENINBITS),
.NUMLINES(`ICACHE_WAYSIZEINBYTES*8/`ICACHE_LINELENINBITS),
.NUMWAYS(`ICACHE_NUMWAYS), .LOGBWPL(LOGBWPL), .WORDLEN(32), .MUXINTERVAL(16), .DCACHE(0))
@ -227,7 +224,7 @@ module ifu (
.CacheMiss(ICacheMiss), .CacheAccess(ICacheAccess),
.ByteMask('0), .WordCount('0), .SelBusWord('0),
.FinalWriteData('0),
.RW(NonIROMMemRWM),
.RW(RWF),
.Atomic('0), .FlushCache('0),
.NextAdr(PCNextFSpill[11:0]),
.PAdr(PCPF),
@ -249,7 +246,7 @@ module ifu (
assign IFUHADDR = PCPF;
logic CaptureEn;
logic [1:0] RW;
assign RW = NonIROMMemRWM & ~{ITLBMissF, ITLBMissF};
assign RW = RWF & ~{ITLBMissF, ITLBMissF};
assign IFUHSIZE = 3'b010;
ahbinterface #(0) ahbinterface(.HCLK(clk), .HRESETn(~reset), .HREADY(IFUHREADY),

10
pipelined/src/lsu/lsu.sv
View File

@ -130,7 +130,7 @@ module lsu (
/////////////////////////////////////////////////////////////////////////////////////////////
if(`VIRTMEM_SUPPORTED) begin : VIRTMEM_SUPPORTED
lsuvirtmem lsuvirtmem(.clk, .reset, .StallW, .MemRWM(NonDTIMMemRWM), .AtomicM, .ITLBMissF, .ITLBWriteF,
lsuvirtmem lsuvirtmem(.clk, .reset, .StallW, .MemRWM, .AtomicM, .ITLBMissF, .ITLBWriteF,
.DTLBMissM, .DTLBWriteM, .InstrDAPageFaultF, .DataDAPageFaultM, .SelReplay,
.TrapM, .DCacheStallM, .SATP_REGW, .PCF,
.STATUS_MXR, .STATUS_SUM, .STATUS_MPRV, .STATUS_MPP, .PrivilegeModeW,
@ -140,7 +140,7 @@ module lsu (
.IgnoreRequestTLB);
end else begin
assign {InterlockStall, SelHPTW, PTE, PageType, DTLBWriteM, ITLBWriteF, IgnoreRequestTLB} = '0;
assign CPUBusy = StallW; assign PreLSURWM = NonDTIMMemRWM;
assign CPUBusy = StallW; assign PreLSURWM = MemRWM;
assign IHAdrM = IEUAdrExtM;
assign LSUFunct3M = Funct3M; assign LSUFunct7M = Funct7M; assign LSUAtomicM = AtomicM;
assign IMWriteDataM = WriteDataM;
@ -207,7 +207,6 @@ module lsu (
if (`DTIM_SUPPORTED) begin : dtim
logic [`PA_BITS-1:0] DTIMAdr;
logic DTIMAccessRW;
logic MemStage;
// The DTIM uses untranslated addresses, so it is not compatible with virtual memory.
@ -216,11 +215,6 @@ module lsu (
assign MemStage = CPUBusy | MemRWM[0] | reset; // 1 = M stage; 0 = E stage
assign DTIMAdr = MemStage ? IEUAdrExtM : IEUAdrExtE; // zero extend or contract to PA_BITS
/* verilator lint_on WIDTH */
assign DTIMAccessRW = |MemRWM;
// *** Ross remove this.
adrdec dtimdec(IEUAdrExtM, `DTIM_BASE, `DTIM_RANGE, `DTIM_SUPPORTED, DTIMAccessRW, 2'b10, 4'b1111, SelDTIM); // maybe we pull this out of the mmu?
//assign NonDTIMMemRWM = MemRWM & ~{2{SelDTIM}}; // disable access to bus-based memory map when DTIM is selected
assign NonDTIMMemRWM = MemRWM; // *** fix
dtim dtim(.clk, .reset, .MemRWM,
.Adr(DTIMAdr),