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Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main

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This commit is contained in:
Ross Thompson 2021-07-05 16:07:27 -05:00
commit 2a62ee2e70
30 changed files with 446 additions and 427 deletions
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3
wally-pipelined/regression/wave-dos/peripheral-waves.do
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@ -9,7 +9,8 @@ add wave /testbench/clk
add wave /testbench/reset
add wave -divider
add wave /testbench/dut/hart/DataStall
#add wave /testbench/dut/hart/DataStall
add wave /testbench/debug
add wave /testbench/dut/hart/StallF
add wave /testbench/dut/hart/StallD
add wave /testbench/dut/hart/StallE

19
wally-pipelined/src/cache/ICacheCntrl.sv vendored
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@ -115,8 +115,8 @@ module ICacheCntrl #(parameter BLOCKLEN = 256)
localparam STATE_INVALIDATE = 'h12; // *** not sure if invalidate or evict? invalidate by cache block or address?
localparam STATE_TLB_MISS = 'h13;
localparam STATE_TLB_MISS_DONE = 'h14;
localparam STATE_INSTR_PAGE_FAULT = 'h15;
localparam AHBByteLength = `XLEN / 8;
localparam AHBOFFETWIDTH = $clog2(AHBByteLength);
@ -370,13 +370,20 @@ module ICacheCntrl #(parameter BLOCKLEN = 256)
NextState = STATE_READY;
end
STATE_TLB_MISS: begin
if (ITLBWriteF | WalkerInstrPageFaultF) begin
if (WalkerInstrPageFaultF) begin
NextState = STATE_INSTR_PAGE_FAULT;
ICacheStallF = 1'b0;
end else if (ITLBWriteF) begin
NextState = STATE_TLB_MISS_DONE;
end else begin
NextState = STATE_TLB_MISS;
end
end
STATE_TLB_MISS_DONE : begin
STATE_TLB_MISS_DONE: begin
NextState = STATE_READY;
end
STATE_INSTR_PAGE_FAULT: begin
ICacheStallF = 1'b0;
NextState = STATE_READY;
end
default: begin
@ -425,8 +432,8 @@ module ICacheCntrl #(parameter BLOCKLEN = 256)
// store read data from memory interface before writing into SRAM.
genvar i;
generate
for (i = 0; i < WORDSPERLINE; i++) begin
flopenr #(`XLEN) flop(.clk(clk),
for (i = 0; i < WORDSPERLINE; i++) begin:storebuffer
flopenr #(`XLEN) sb(.clk(clk),
.reset(reset),
.en(InstrAckF & (i == FetchCount)),
.d(InstrInF),

4
wally-pipelined/src/cache/dmapped.sv vendored
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@ -106,7 +106,7 @@ module rodirectmappedmem #(parameter NUMLINES=512, parameter LINESIZE = 256, par
assign DataWord = ReadLineTransformed[ReadOffset];
genvar i;
generate
for (i=0; i < LINESIZE/WORDSIZE; i++) begin
for (i=0; i < LINESIZE/WORDSIZE; i++) begin:readline
assign ReadLineTransformed[i] = ReadLine[(i+1)*WORDSIZE-1:i*WORDSIZE];
end
endgenerate
@ -214,7 +214,7 @@ module wtdirectmappedmem #(parameter NUMLINES=512, parameter LINESIZE = 256, par
assign DataWord = ReadLineTransformed[ReadOffset];
genvar i;
generate
for (i=0; i < LINESIZE/WORDSIZE; i++) begin
for (i=0; i < LINESIZE/WORDSIZE; i++) begin:readline
assign ReadLineTransformed[i] = ReadLine[(i+1)*WORDSIZE-1:i*WORDSIZE];
end
endgenerate

4
wally-pipelined/src/ebu/ahblite.sv
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@ -216,11 +216,9 @@ module ahblite (
subwordread swr(.*);
// Handle AMO instructions if applicable
generate
generate
if (`A_SUPPORTED) begin
logic [`XLEN-1:0] AMOResult;
// amoalu amoalu(.a(HRDATA), .b(WriteDataM), .funct(Funct7M), .width(MemSizeM),
// .result(AMOResult));
amoalu amoalu(.srca(HRDATAW), .srcb(WriteDataM), .funct(Funct7M), .width(MemSizeM),
.result(AMOResult));
mux2 #(`XLEN) wdmux(WriteDataM, AMOResult, AtomicMaskedM[1], WriteData);

676
wally-pipelined/src/fpu/fpu.sv
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@ -43,90 +43,93 @@ module fpu (
output logic [4:0] SetFflagsM, // FPU flags
output logic [`XLEN-1:0] FPUResultW); // FPU result
// *** change FMA to do 16 - 32 - 64 - 128 FEXPBITS
// control logic signal instantiation
logic FWriteEnD, FWriteEnE, FWriteEnM, FWriteEnW; // FP register write enable
logic [2:0] FrmD, FrmE, FrmM; // FP rounding mode
logic FmtD, FmtE, FmtM, FmtW; // FP precision 0-single 1-double
logic FDivStartD, FDivStartE; // Start division
logic FWriteIntD; // Write to integer register
logic [1:0] ForwardXE, ForwardYE, ForwardZE; // Input3 forwarding mux control signal
logic [2:0] FResultSelD, FResultSelE, FResultSelM, FResultSelW; // Select FP result
logic [3:0] FOpCtrlD, FOpCtrlE, FOpCtrlM; // Select which opperation to do in each component
logic [1:0] FResSelD, FResSelE, FResSelM;
logic [1:0] FIntResSelD, FIntResSelE, FIntResSelM;
logic [4:0] Adr1E, Adr2E, Adr3E;
// regfile signals
logic [4:0] RdE, RdM, RdW; // what adress to write to // ***Can take from ieu insted of pipelining
logic [63:0] FRD1D, FRD2D, FRD3D; // Read Data from FP register - decode stage
logic [63:0] FRD1E, FRD2E, FRD3E; // Read Data from FP register - execute stage
logic [`XLEN-1:0] SrcXMAligned;
logic [63:0] SrcXE, SrcXM; // Input 1 to the various units (after forwarding)
logic [63:0] SrcYE, SrcYM; // Input 2 to the various units (after forwarding)
logic [63:0] SrcZE, SrcZM; // Input 3 to the various units (after forwarding)
// div/sqrt signals
logic [63:0] FDivResultM, FDivResultW;
logic [4:0] FDivSqrtFlgM, FDivSqrtFlgW;
logic FDivSqrtDoneE;
logic [63:0] DivInput1E, DivInput2E;
logic HoldInputs; // keep forwarded inputs arround durring division
// FMA signals
logic [105:0] ProdManE, ProdManM; ///*** put pipline stages in units
logic [161:0] AlignedAddendE, AlignedAddendM;
logic [12:0] ProdExpE, ProdExpM;
logic AddendStickyE, AddendStickyM;
logic KillProdE, KillProdM;
logic XZeroE, YZeroE, ZZeroE, XZeroM, YZeroM, ZZeroM;
logic XInfE, YInfE, ZInfE, XInfM, YInfM, ZInfM;
logic XNaNE, YNaNE, ZNaNE, XNaNM, YNaNM, ZNaNM;
logic [63:0] FMAResM, FMAResW;
logic [4:0] FMAFlgM, FMAFlgW;
// add/cvt signals
logic [63:0] AddSumE, AddSumM;
logic [63:0] AddSumTcE, AddSumTcM;
logic [3:0] AddSelInvE, AddSelInvM;
logic [10:0] AddExpPostSumE,AddExpPostSumM;
logic AddCorrSignE, AddCorrSignM;
logic AddOp1NormE, AddOp1NormM;
logic AddOp2NormE, AddOp2NormM;
logic AddOpANormE, AddOpANormM;
logic AddOpBNormE, AddOpBNormM;
logic AddInvalidE, AddInvalidM;
logic AddDenormInE, AddDenormInM;
logic AddSwapE, AddSwapM;
logic AddNormOvflowE, AddNormOvflowM; //***this isn't used in addcvt2
logic AddSignAE, AddSignAM;
logic AddConvertE, AddConvertM;
logic [63:0] AddFloat1E, AddFloat2E, AddFloat1M, AddFloat2M;
logic [11:0] AddExp1DenormE, AddExp2DenormE, AddExp1DenormM, AddExp2DenormM;
logic [10:0] AddExponentE, AddExponentM;
logic [63:0] FAddResM, FAddResW;
logic [4:0] FAddFlgM, FAddFlgW;
// cmp signals
logic CmpNVE, CmpNVM, CmpNVW;
logic [63:0] CmpResE, CmpResM, CmpResW;
// fsgn signals
logic [63:0] SgnResE, SgnResM;
logic SgnNVE, SgnNVM, SgnNVW;
logic [63:0] FResM, FResW;
logic FFlgM, FFlgW;
// instantiation of W stage regfile signals
logic [63:0] AlignedSrcAM;
// classify signals
logic [63:0] ClassResE, ClassResM;
// 64-bit FPU result
logic [63:0] FPUResult64W;
logic [4:0] FPUFlagsW;
generate
if (`F_SUPPORTED) begin
// control logic signal instantiation
logic FWriteEnD, FWriteEnE, FWriteEnM, FWriteEnW; // FP register write enable
logic [2:0] FrmD, FrmE, FrmM; // FP rounding mode
logic FmtD, FmtE, FmtM, FmtW; // FP precision 0-single 1-double
logic FDivStartD, FDivStartE; // Start division
logic FWriteIntD; // Write to integer register
logic [1:0] ForwardXE, ForwardYE, ForwardZE; // Input3 forwarding mux control signal
logic [2:0] FResultSelD, FResultSelE, FResultSelM, FResultSelW; // Select FP result
logic [3:0] FOpCtrlD, FOpCtrlE, FOpCtrlM; // Select which opperation to do in each component
logic [1:0] FResSelD, FResSelE, FResSelM;
logic [1:0] FIntResSelD, FIntResSelE, FIntResSelM;
logic [4:0] Adr1E, Adr2E, Adr3E;
// regfile signals
logic [4:0] RdE, RdM, RdW; // what adress to write to // ***Can take from ieu insted of pipelining
logic [63:0] FRD1D, FRD2D, FRD3D; // Read Data from FP register - decode stage
logic [63:0] FRD1E, FRD2E, FRD3E; // Read Data from FP register - execute stage
logic [`XLEN-1:0] SrcXMAligned;
logic [63:0] SrcXE, SrcXM; // Input 1 to the various units (after forwarding)
logic [63:0] SrcYE, SrcYM; // Input 2 to the various units (after forwarding)
logic [63:0] SrcZE, SrcZM; // Input 3 to the various units (after forwarding)
// div/sqrt signals
logic [63:0] FDivResultM, FDivResultW;
logic [4:0] FDivSqrtFlgM, FDivSqrtFlgW;
logic FDivSqrtDoneE;
logic [63:0] DivInput1E, DivInput2E;
logic HoldInputs; // keep forwarded inputs arround durring division
// FMA signals
logic [105:0] ProdManE, ProdManM; ///*** put pipline stages in units
logic [161:0] AlignedAddendE, AlignedAddendM;
logic [12:0] ProdExpE, ProdExpM;
logic AddendStickyE, AddendStickyM;
logic KillProdE, KillProdM;
logic XZeroE, YZeroE, ZZeroE, XZeroM, YZeroM, ZZeroM;
logic XInfE, YInfE, ZInfE, XInfM, YInfM, ZInfM;
logic XNaNE, YNaNE, ZNaNE, XNaNM, YNaNM, ZNaNM;
logic [63:0] FMAResM, FMAResW;
logic [4:0] FMAFlgM, FMAFlgW;
// add/cvt signals
logic [63:0] AddSumE, AddSumM;
logic [63:0] AddSumTcE, AddSumTcM;
logic [3:0] AddSelInvE, AddSelInvM;
logic [10:0] AddExpPostSumE,AddExpPostSumM;
logic AddCorrSignE, AddCorrSignM;
logic AddOp1NormE, AddOp1NormM;
logic AddOp2NormE, AddOp2NormM;
logic AddOpANormE, AddOpANormM;
logic AddOpBNormE, AddOpBNormM;
logic AddInvalidE, AddInvalidM;
logic AddDenormInE, AddDenormInM;
logic AddSwapE, AddSwapM;
logic AddNormOvflowE, AddNormOvflowM; //***this isn't used in addcvt2
logic AddSignAE, AddSignAM;
logic AddConvertE, AddConvertM;
logic [63:0] AddFloat1E, AddFloat2E, AddFloat1M, AddFloat2M;
logic [11:0] AddExp1DenormE, AddExp2DenormE, AddExp1DenormM, AddExp2DenormM;
logic [10:0] AddExponentE, AddExponentM;
logic [63:0] FAddResM, FAddResW;
logic [4:0] FAddFlgM, FAddFlgW;
// cmp signals
logic CmpNVE, CmpNVM, CmpNVW;
logic [63:0] CmpResE, CmpResM, CmpResW;
// fsgn signals
logic [63:0] SgnResE, SgnResM;
logic SgnNVE, SgnNVM, SgnNVW;
logic [63:0] FResM, FResW;
logic FFlgM, FFlgW;
// instantiation of W stage regfile signals
logic [63:0] AlignedSrcAM;
// classify signals
logic [63:0] ClassResE, ClassResM;
// 64-bit FPU result
logic [63:0] FPUResult64W;
logic [4:0] FPUFlagsW;
@ -134,189 +137,19 @@ module fpu (
//DECODE STAGE
// top-level controller for FPU
fctrl fctrl (.Funct7D(InstrD[31:25]), .OpD(InstrD[6:0]), .Rs2D(InstrD[24:20]), .Funct3D(InstrD[14:12]),
.FRM_REGW, .IllegalFPUInstrD, .FWriteEnD, .FDivStartD, .FResultSelD, .FOpCtrlD, .FResSelD,
.FIntResSelD, .FmtD, .FrmD, .FWriteIntD);
// regfile instantiation
fregfile fregfile (clk, reset, FWriteEnW,
InstrD[19:15], InstrD[24:20], InstrD[31:27], RdW,
FPUResult64W,
FRD1D, FRD2D, FRD3D);
//*****************
// D/E pipe registers
//*****************
flopenrc #(64) DEReg1(clk, reset, FlushE, ~StallE, FRD1D, FRD1E);
flopenrc #(64) DEReg2(clk, reset, FlushE, ~StallE, FRD2D, FRD2E);
flopenrc #(64) DEReg3(clk, reset, FlushE, ~StallE, FRD3D, FRD3E);
flopenrc #(1) DECtrlRegE1(clk, reset, FlushE, ~StallE, FDivStartD, FDivStartE);
flopenrc #(15) DECtrlRegE2(clk, reset, FlushE, ~StallE, {InstrD[19:15], InstrD[24:20], InstrD[31:27]},
{Adr1E, Adr2E, Adr3E});
flopenrc #(22) DECtrlReg3(clk, reset, FlushE, ~StallE,
{FWriteEnD, FResultSelD, FResSelD, FIntResSelD, FrmD, FmtD, InstrD[11:7], FOpCtrlD, FWriteIntD},
{FWriteEnE, FResultSelE, FResSelE, FIntResSelE, FrmE, FmtE, RdE, FOpCtrlE, FWriteIntE});
//EXECUTION STAGE
// Hazard unit for FPU
fhazard fhazard(.Adr1E, .Adr2E, .Adr3E, .FWriteEnM, .FWriteEnW, .RdM, .RdW, .FResultSelM, .FStallD,
.ForwardXE, .ForwardYE, .ForwardZE);
// forwarding muxs
mux3 #(64) fxemux(FRD1E, FPUResult64W, FResM, ForwardXE, SrcXE);
mux3 #(64) fyemux(FRD2E, FPUResult64W, FResM, ForwardYE, SrcYE);
mux3 #(64) fzemux(FRD3E, FPUResult64W, FResM, ForwardZE, SrcZE);
// first of two-stage instance of floating-point fused multiply-add unit
fma1 fma1 (.X(SrcXE), .Y(SrcYE), .Z(SrcZE), .FOpCtrlE(FOpCtrlE[2:0]), .FmtE, .ProdManE, .AlignedAddendE,
.ProdExpE, .AddendStickyE, .KillProdE, .XZeroE, .YZeroE, .ZZeroE, .XInfE, .YInfE, .ZInfE,
.XNaNE, .YNaNE, .ZNaNE );
// first and only instance of floating-point divider
logic fpdivClk;
clockgater fpdivclkg(.E(FDivStartE),
.SE(1'b0),
.CLK(clk),
.ECLK(fpdivClk));
// capture the inputs for div/sqrt
flopenrc #(64) reg_input1 (.d(SrcXE), .q(DivInput1E),
.en(~HoldInputs), .clear(FDivSqrtDoneE),
.reset(reset), .clk(clk));
flopenrc #(64) reg_input2 (.d(SrcYE), .q(DivInput2E),
.en(~HoldInputs), .clear(FDivSqrtDoneE),
.reset(reset), .clk(clk));
fdivsqrt fdivsqrt (.DivOpType(FOpCtrlE[0]), .clk(fpdivClk), .FmtE(~FmtE), .DivInput1E, .DivInput2E,
.FrmE, .DivOvEn(1'b1), .DivUnEn(1'b1), .FDivStartE, .FDivResultM, .FDivSqrtFlgM,
.FDivSqrtDoneE, .FDivBusyE, .HoldInputs, .reset);
// first of two-stage instance of floating-point add/cvt unit
fpuaddcvt1 fpadd1 (.SrcXE, .SrcYE, .FOpCtrlE, .FmtE, .AddFloat1E, .AddFloat2E, .AddExponentE,
.AddExpPostSumE, .AddExp1DenormE, .AddExp2DenormE, .AddSumE, .AddSumTcE, .AddSelInvE,
.AddCorrSignE, .AddSignAE, .AddOp1NormE, .AddOp2NormE, .AddOpANormE, .AddOpBNormE, .AddInvalidE,
.AddDenormInE, .AddConvertE, .AddSwapE, .AddNormOvflowE);
// first and only instance of floating-point comparator
fcmp fcmp (SrcXE, SrcYE, FOpCtrlE[2:0], FmtE, CmpNVE, CmpResE);
// first and only instance of floating-point sign converter
fsgn fsgn (.SgnOpCodeE(FOpCtrlE[1:0]), .SrcXE, .SrcYE, .SgnResE, .SgnNVE);
// first and only instance of floating-point classify unit
fclassify fclassify (.SrcXE, .FmtE, .ClassResE);
// output for store instructions
assign FWriteDataE = FmtE ? SrcYE[63:64-`XLEN] : {{`XLEN-32{1'b0}}, SrcYE[63:32]};
//***swap to mux
//*****************
// E/M pipe registers
//*****************
flopenrc #(64) EMFpReg1(clk, reset, FlushM, ~StallM, SrcXE, SrcXM);
flopenrc #(64) EMFpReg2(clk, reset, FlushM, ~StallM, SrcYE, SrcYM);
flopenrc #(64) EMFpReg3(clk, reset, FlushM, ~StallM, SrcZE, SrcZM);
flopenrc #(106) EMRegFma1(clk, reset, FlushM, ~StallM, ProdManE, ProdManM);
flopenrc #(162) EMRegFma2(clk, reset, FlushM, ~StallM, AlignedAddendE, AlignedAddendM);
flopenrc #(13) EMRegFma3(clk, reset, FlushM, ~StallM, ProdExpE, ProdExpM);
flopenrc #(11) EMRegFma4(clk, reset, FlushM, ~StallM,
{AddendStickyE, KillProdE, XZeroE, YZeroE, ZZeroE, XInfE, YInfE, ZInfE, XNaNE, YNaNE, ZNaNE},
{AddendStickyM, KillProdM, XZeroM, YZeroM, ZZeroM, XInfM, YInfM, ZInfM, XNaNM, YNaNM, ZNaNM});
flopenrc #(64) EMRegAdd1(clk, reset, FlushM, ~StallM, AddSumE, AddSumM);
flopenrc #(64) EMRegAdd2(clk, reset, FlushM, ~StallM, AddSumTcE, AddSumTcM);
flopenrc #(11) EMRegAdd3(clk, reset, FlushM, ~StallM, AddExpPostSumE, AddExpPostSumM);
flopenrc #(64) EMRegAdd4(clk, reset, FlushM, ~StallM, AddFloat1E, AddFloat1M);
flopenrc #(64) EMRegAdd5(clk, reset, FlushM, ~StallM, AddFloat2E, AddFloat2M);
flopenrc #(12) EMRegAdd6(clk, reset, FlushM, ~StallM, AddExp1DenormE, AddExp1DenormM);
flopenrc #(12) EMRegAdd7(clk, reset, FlushM, ~StallM, AddExp2DenormE, AddExp2DenormM);
flopenrc #(11) EMRegAdd8(clk, reset, FlushM, ~StallM, AddExponentE, AddExponentM);
flopenrc #(15) EMRegAdd9(clk, reset, FlushM, ~StallM,
{AddSelInvE, AddCorrSignE, AddOp1NormE, AddOp2NormE, AddOpANormE, AddOpBNormE, AddInvalidE, AddDenormInE, AddConvertE, AddSwapE, AddNormOvflowE, AddSignAE},
{AddSelInvM, AddCorrSignM, AddOp1NormM, AddOp2NormM, AddOpANormM, AddOpBNormM, AddInvalidM, AddDenormInM, AddConvertM, AddSwapM, AddNormOvflowM, AddSignAM});
flopenrc #(1) EMRegCmp1(clk, reset, FlushM, ~StallM, CmpNVE, CmpNVM);
flopenrc #(64) EMRegCmp2(clk, reset, FlushM, ~StallM, CmpResE, CmpResM);
flopenrc #(64) EMRegSgn1(clk, reset, FlushM, ~StallM, SgnResE, SgnResM);
flopenrc #(1) EMRegSgn2(clk, reset, FlushM, ~StallM, SgnNVE, SgnNVM);
flopenrc #(22) EMCtrlReg(clk, reset, FlushM, ~StallM,
{FWriteEnE, FResultSelE, FResSelE, FIntResSelE, FrmE, FmtE, RdE, FOpCtrlE, FWriteIntE},
{FWriteEnM, FResultSelM, FResSelM, FIntResSelM, FrmM, FmtM, RdM, FOpCtrlM, FWriteIntM});
flopenrc #(64) EMRegClass(clk, reset, FlushM, ~StallM, ClassResE, ClassResM);
//BEGIN MEMORY STAGE
mux3 #(64) FResMux(AlignedSrcAM, SgnResM, CmpResM, FResSelM, FResM);
mux3 #(1) FFlgMux(1'b0, SgnNVM, CmpNVM, FResSelM, FFlgM);
//***change to mux
assign SrcXMAligned = FmtM ? SrcXM[63:64-`XLEN] : {{`XLEN-32{1'b0}}, SrcXM[63:32]};
mux3 #(`XLEN) IntResMux(CmpResM[`XLEN-1:0], SrcXMAligned, ClassResM[`XLEN-1:0], FIntResSelM, FIntResM);
// second instance of two-stage FMA unit
fma2 fma2(.X(SrcXM), .Y(SrcYM), .Z(SrcZM), .FOpCtrlM(FOpCtrlM[2:0]), .FrmM, .FmtM,
.ProdManM, .AlignedAddendM, .ProdExpM, .AddendStickyM, .KillProdM,
.XZeroM, .YZeroM, .ZZeroM, .XInfM, .YInfM, .ZInfM, .XNaNM, .YNaNM, .ZNaNM,
.FMAResM, .FMAFlgM);
// second instance of two-stage floating-point add/cvt unit
fpuaddcvt2 fpadd2 (.FrmM, .FOpCtrlM, .FmtM, .AddSumM, .AddSumTcM, .AddFloat1M, .AddFloat2M,
.AddExp1DenormM, .AddExp2DenormM, .AddExponentM, .AddExpPostSumM, .AddSelInvM,
.AddOp1NormM, .AddOp2NormM, .AddOpANormM, .AddOpBNormM, .AddInvalidM, .AddDenormInM,
.AddSignAM, .AddCorrSignM, .AddConvertM, .AddSwapM, .FAddResM, .FAddFlgM);
// Align SrcA to MSB when single precicion
mux2 #(64) SrcAMux({SrcAM[31:0], 32'b0}, {{64-`XLEN{1'b0}}, SrcAM}, FmtM, AlignedSrcAM);
//DECODE STAGE
// top-level controller for FPU
fctrl fctrl (.Funct7D(InstrD[31:25]), .OpD(InstrD[6:0]), .Rs2D(InstrD[24:20]), .Funct3D(InstrD[14:12]),
.FRM_REGW, .IllegalFPUInstrD, .FWriteEnD, .FDivStartD, .FResultSelD, .FOpCtrlD, .FResSelD,
.FIntResSelD, .FmtD, .FrmD, .FWriteIntD);
// regfile instantiation
fregfile fregfile (clk, reset, FWriteEnW,
InstrD[19:15], InstrD[24:20], InstrD[31:27], RdW,
FPUResult64W,
FRD1D, FRD2D, FRD3D);
@ -326,77 +159,260 @@ module fpu (
//*****************
// D/E pipe registers
//*****************
flopenrc #(64) DEReg1(clk, reset, FlushE, ~StallE, FRD1D, FRD1E);
flopenrc #(64) DEReg2(clk, reset, FlushE, ~StallE, FRD2D, FRD2E);
flopenrc #(64) DEReg3(clk, reset, FlushE, ~StallE, FRD3D, FRD3E);
flopenrc #(1) DECtrlRegE1(clk, reset, FlushE, ~StallE, FDivStartD, FDivStartE);
flopenrc #(15) DECtrlRegE2(clk, reset, FlushE, ~StallE, {InstrD[19:15], InstrD[24:20], InstrD[31:27]},
{Adr1E, Adr2E, Adr3E});
flopenrc #(22) DECtrlReg3(clk, reset, FlushE, ~StallE,
{FWriteEnD, FResultSelD, FResSelD, FIntResSelD, FrmD, FmtD, InstrD[11:7], FOpCtrlD, FWriteIntD},
{FWriteEnE, FResultSelE, FResSelE, FIntResSelE, FrmE, FmtE, RdE, FOpCtrlE, FWriteIntE});
//EXECUTION STAGE
// Hazard unit for FPU
fhazard fhazard(.Adr1E, .Adr2E, .Adr3E, .FWriteEnM, .FWriteEnW, .RdM, .RdW, .FResultSelM, .FStallD,
.ForwardXE, .ForwardYE, .ForwardZE);
// forwarding muxs
mux3 #(64) fxemux(FRD1E, FPUResult64W, FResM, ForwardXE, SrcXE);
mux3 #(64) fyemux(FRD2E, FPUResult64W, FResM, ForwardYE, SrcYE);
mux3 #(64) fzemux(FRD3E, FPUResult64W, FResM, ForwardZE, SrcZE);
// first of two-stage instance of floating-point fused multiply-add unit
fma1 fma1 (.X(SrcXE), .Y(SrcYE), .Z(SrcZE), .FOpCtrlE(FOpCtrlE[2:0]), .FmtE, .ProdManE, .AlignedAddendE,
.ProdExpE, .AddendStickyE, .KillProdE, .XZeroE, .YZeroE, .ZZeroE, .XInfE, .YInfE, .ZInfE,
.XNaNE, .YNaNE, .ZNaNE );
// first and only instance of floating-point divider
logic fpdivClk;
clockgater fpdivclkg(.E(FDivStartE),
.SE(1'b0),
.CLK(clk),
.ECLK(fpdivClk));
// capture the inputs for div/sqrt
flopenrc #(64) reg_input1 (.d(SrcXE), .q(DivInput1E),
.en(~HoldInputs), .clear(FDivSqrtDoneE),
.reset(reset), .clk(clk));
flopenrc #(64) reg_input2 (.d(SrcYE), .q(DivInput2E),
.en(~HoldInputs), .clear(FDivSqrtDoneE),
.reset(reset), .clk(clk));
fdivsqrt fdivsqrt (.DivOpType(FOpCtrlE[0]), .clk(fpdivClk), .FmtE(~FmtE), .DivInput1E, .DivInput2E,
.FrmE, .DivOvEn(1'b1), .DivUnEn(1'b1), .FDivStartE, .FDivResultM, .FDivSqrtFlgM,
.FDivSqrtDoneE, .FDivBusyE, .HoldInputs, .reset);
// first of two-stage instance of floating-point add/cvt unit
fpuaddcvt1 fpadd1 (.SrcXE, .SrcYE, .FOpCtrlE, .FmtE, .AddFloat1E, .AddFloat2E, .AddExponentE,
.AddExpPostSumE, .AddExp1DenormE, .AddExp2DenormE, .AddSumE, .AddSumTcE, .AddSelInvE,
.AddCorrSignE, .AddSignAE, .AddOp1NormE, .AddOp2NormE, .AddOpANormE, .AddOpBNormE, .AddInvalidE,
.AddDenormInE, .AddConvertE, .AddSwapE, .AddNormOvflowE);
// first and only instance of floating-point comparator
fcmp fcmp (SrcXE, SrcYE, FOpCtrlE[2:0], FmtE, CmpNVE, CmpResE);
// first and only instance of floating-point sign converter
fsgn fsgn (.SgnOpCodeE(FOpCtrlE[1:0]), .SrcXE, .SrcYE, .SgnResE, .SgnNVE);
// first and only instance of floating-point classify unit
fclassify fclassify (.SrcXE, .FmtE, .ClassResE);
// output for store instructions
assign FWriteDataE = FmtE ? SrcYE[63:64-`XLEN] : {{`XLEN-32{1'b0}}, SrcYE[63:32]};
//***swap to mux
//*****************
// E/M pipe registers
//*****************
flopenrc #(64) EMFpReg1(clk, reset, FlushM, ~StallM, SrcXE, SrcXM);
flopenrc #(64) EMFpReg2(clk, reset, FlushM, ~StallM, SrcYE, SrcYM);
flopenrc #(64) EMFpReg3(clk, reset, FlushM, ~StallM, SrcZE, SrcZM);
flopenrc #(106) EMRegFma1(clk, reset, FlushM, ~StallM, ProdManE, ProdManM);
flopenrc #(162) EMRegFma2(clk, reset, FlushM, ~StallM, AlignedAddendE, AlignedAddendM);
flopenrc #(13) EMRegFma3(clk, reset, FlushM, ~StallM, ProdExpE, ProdExpM);
flopenrc #(11) EMRegFma4(clk, reset, FlushM, ~StallM,
{AddendStickyE, KillProdE, XZeroE, YZeroE, ZZeroE, XInfE, YInfE, ZInfE, XNaNE, YNaNE, ZNaNE},
{AddendStickyM, KillProdM, XZeroM, YZeroM, ZZeroM, XInfM, YInfM, ZInfM, XNaNM, YNaNM, ZNaNM});
flopenrc #(64) EMRegAdd1(clk, reset, FlushM, ~StallM, AddSumE, AddSumM);
flopenrc #(64) EMRegAdd2(clk, reset, FlushM, ~StallM, AddSumTcE, AddSumTcM);
flopenrc #(11) EMRegAdd3(clk, reset, FlushM, ~StallM, AddExpPostSumE, AddExpPostSumM);
flopenrc #(64) EMRegAdd4(clk, reset, FlushM, ~StallM, AddFloat1E, AddFloat1M);
flopenrc #(64) EMRegAdd5(clk, reset, FlushM, ~StallM, AddFloat2E, AddFloat2M);
flopenrc #(12) EMRegAdd6(clk, reset, FlushM, ~StallM, AddExp1DenormE, AddExp1DenormM);
flopenrc #(12) EMRegAdd7(clk, reset, FlushM, ~StallM, AddExp2DenormE, AddExp2DenormM);
flopenrc #(11) EMRegAdd8(clk, reset, FlushM, ~StallM, AddExponentE, AddExponentM);
flopenrc #(15) EMRegAdd9(clk, reset, FlushM, ~StallM,
{AddSelInvE, AddCorrSignE, AddOp1NormE, AddOp2NormE, AddOpANormE, AddOpBNormE, AddInvalidE, AddDenormInE, AddConvertE, AddSwapE, AddNormOvflowE, AddSignAE},
{AddSelInvM, AddCorrSignM, AddOp1NormM, AddOp2NormM, AddOpANormM, AddOpBNormM, AddInvalidM, AddDenormInM, AddConvertM, AddSwapM, AddNormOvflowM, AddSignAM});
flopenrc #(1) EMRegCmp1(clk, reset, FlushM, ~StallM, CmpNVE, CmpNVM);
flopenrc #(64) EMRegCmp2(clk, reset, FlushM, ~StallM, CmpResE, CmpResM);
flopenrc #(64) EMRegSgn1(clk, reset, FlushM, ~StallM, SgnResE, SgnResM);
flopenrc #(1) EMRegSgn2(clk, reset, FlushM, ~StallM, SgnNVE, SgnNVM);
flopenrc #(22) EMCtrlReg(clk, reset, FlushM, ~StallM,
{FWriteEnE, FResultSelE, FResSelE, FIntResSelE, FrmE, FmtE, RdE, FOpCtrlE, FWriteIntE},
{FWriteEnM, FResultSelM, FResSelM, FIntResSelM, FrmM, FmtM, RdM, FOpCtrlM, FWriteIntM});
flopenrc #(64) EMRegClass(clk, reset, FlushM, ~StallM, ClassResE, ClassResM);
//BEGIN MEMORY STAGE
mux3 #(64) FResMux(AlignedSrcAM, SgnResM, CmpResM, FResSelM, FResM);
mux3 #(1) FFlgMux(1'b0, SgnNVM, CmpNVM, FResSelM, FFlgM);
//***change to mux
assign SrcXMAligned = FmtM ? SrcXM[63:64-`XLEN] : {{`XLEN-32{1'b0}}, SrcXM[63:32]};
mux3 #(`XLEN) IntResMux(CmpResM[`XLEN-1:0], SrcXMAligned, ClassResM[`XLEN-1:0], FIntResSelM, FIntResM);
// second instance of two-stage FMA unit
fma2 fma2(.X(SrcXM), .Y(SrcYM), .Z(SrcZM), .FOpCtrlM(FOpCtrlM[2:0]), .FrmM, .FmtM,
.ProdManM, .AlignedAddendM, .ProdExpM, .AddendStickyM, .KillProdM,
.XZeroM, .YZeroM, .ZZeroM, .XInfM, .YInfM, .ZInfM, .XNaNM, .YNaNM, .ZNaNM,
.FMAResM, .FMAFlgM);
// second instance of two-stage floating-point add/cvt unit
fpuaddcvt2 fpadd2 (.FrmM, .FOpCtrlM, .FmtM, .AddSumM, .AddSumTcM, .AddFloat1M, .AddFloat2M,
.AddExp1DenormM, .AddExp2DenormM, .AddExponentM, .AddExpPostSumM, .AddSelInvM,
.AddOp1NormM, .AddOp2NormM, .AddOpANormM, .AddOpBNormM, .AddInvalidM, .AddDenormInM,
.AddSignAM, .AddCorrSignM, .AddConvertM, .AddSwapM, .FAddResM, .FAddFlgM);
// Align SrcA to MSB when single precicion
mux2 #(64) SrcAMux({SrcAM[31:0], 32'b0}, {{64-`XLEN{1'b0}}, SrcAM}, FmtM, AlignedSrcAM);
//*****************
// M/W pipe registers
//*****************
flopenrc #(64) MWRegFma1(clk, reset, FlushW, ~StallW, FMAResM, FMAResW);
flopenrc #(5) MWRegFma2(clk, reset, FlushW, ~StallW, FMAFlgM, FMAFlgW);
flopenrc #(64) MWRegDiv1(clk, reset, FlushW, ~StallW, FDivResultM, FDivResultW);
flopenrc #(5) MWRegDiv2(clk, reset, FlushW, ~StallW, FDivSqrtFlgM, FDivSqrtFlgW);
flopenrc #(64) MWRegAdd1(clk, reset, FlushW, ~StallW, FAddResM, FAddResW);
flopenrc #(5) MWRegAdd2(clk, reset, FlushW, ~StallW, FAddFlgM, FAddFlgW);
flopenrc #(1) MWRegCmp1(clk, reset, FlushW, ~StallW, CmpNVM, CmpNVW);
flopenrc #(64) MWRegCmp3(clk, reset, FlushW, ~StallW, CmpResM, CmpResW);
flopenrc #(64) MWRegClass2(clk, reset, FlushW, ~StallW, FResM, FResW);
flopenrc #(1) MWRegClass1(clk, reset, FlushW, ~StallW, FFlgM, FFlgW);
flopenrc #(11) MWCtrlReg(clk, reset, FlushW, ~StallW,
{FWriteEnM, FResultSelM, RdM, FmtM, FWriteIntM},
{FWriteEnW, FResultSelW, RdW, FmtW, FWriteIntW});
//#########################################
// BEGIN WRITEBACK STAGE
//#########################################
//***turn into muxs
always_comb begin
case (FResultSelW)
3'b000 : FPUFlagsW = 5'b0;
3'b001 : FPUFlagsW = FMAFlgW;
3'b010 : FPUFlagsW = FAddFlgW;
3'b011 : FPUFlagsW = FDivSqrtFlgW;
3'b100 : FPUFlagsW = {4'b0,FFlgW};
default : FPUFlagsW = 5'bxxxxx;
endcase
end
always_comb begin
case (FResultSelW)
3'b000 : FPUResult64W = FmtW ? {ReadDataW, {64-`XLEN{1'b0}}} : {ReadDataW[31:0], 32'b0};
3'b001 : FPUResult64W = FMAResW;
3'b010 : FPUResult64W = FAddResW;
3'b011 : FPUResult64W = FDivResultW;
3'b100 : FPUResult64W = FResW;
default : FPUResult64W = 64'bxxxxx;
endcase
end
// interface between XLEN size datapath and double-precision sized
// floating-point results
//
// define offsets for LSB zero extension or truncation
always_comb begin
// zero extension
//***turn into mux
FPUResultW = FmtW ? FPUResult64W[63:64-`XLEN] : {{`XLEN-32{1'b0}}, FPUResult64W[63:32]};
//*** put into mem stage
SetFflagsM = FPUFlagsW;
//*****************
// M/W pipe registers
//*****************
flopenrc #(64) MWRegFma1(clk, reset, FlushW, ~StallW, FMAResM, FMAResW);
flopenrc #(5) MWRegFma2(clk, reset, FlushW, ~StallW, FMAFlgM, FMAFlgW);
flopenrc #(64) MWRegDiv1(clk, reset, FlushW, ~StallW, FDivResultM, FDivResultW);
flopenrc #(5) MWRegDiv2(clk, reset, FlushW, ~StallW, FDivSqrtFlgM, FDivSqrtFlgW);
flopenrc #(64) MWRegAdd1(clk, reset, FlushW, ~StallW, FAddResM, FAddResW);
flopenrc #(5) MWRegAdd2(clk, reset, FlushW, ~StallW, FAddFlgM, FAddFlgW);
flopenrc #(1) MWRegCmp1(clk, reset, FlushW, ~StallW, CmpNVM, CmpNVW);
flopenrc #(64) MWRegCmp3(clk, reset, FlushW, ~StallW, CmpResM, CmpResW);
flopenrc #(64) MWRegClass2(clk, reset, FlushW, ~StallW, FResM, FResW);
flopenrc #(1) MWRegClass1(clk, reset, FlushW, ~StallW, FFlgM, FFlgW);
flopenrc #(11) MWCtrlReg(clk, reset, FlushW, ~StallW,
{FWriteEnM, FResultSelM, RdM, FmtM, FWriteIntM},
{FWriteEnW, FResultSelW, RdW, FmtW, FWriteIntW});
//#########################################
// BEGIN WRITEBACK STAGE
//#########################################
//***turn into muxs
always_comb begin
case (FResultSelW)
3'b000 : FPUFlagsW = 5'b0;
3'b001 : FPUFlagsW = FMAFlgW;
3'b010 : FPUFlagsW = FAddFlgW;
3'b011 : FPUFlagsW = FDivSqrtFlgW;
3'b100 : FPUFlagsW = {4'b0,FFlgW};
default : FPUFlagsW = 5'bxxxxx;
endcase
end
always_comb begin
case (FResultSelW)
3'b000 : FPUResult64W = FmtW ? {ReadDataW, {64-`XLEN{1'b0}}} : {ReadDataW[31:0], 32'b0};
3'b001 : FPUResult64W = FMAResW;
3'b010 : FPUResult64W = FAddResW;
3'b011 : FPUResult64W = FDivResultW;
3'b100 : FPUResult64W = FResW;
default : FPUResult64W = 64'bxxxxx;
endcase
end
// interface between XLEN size datapath and double-precision sized
// floating-point results
//
// define offsets for LSB zero extension or truncation
always_comb begin
// zero extension
//***turn into mux
FPUResultW = FmtW ? FPUResult64W[63:64-`XLEN] : {{`XLEN-32{1'b0}}, FPUResult64W[63:32]};
//*** put into mem stage
SetFflagsM = FPUFlagsW;
end
end else begin // no F_SUPPORTED; tie outputs low
assign FStallD = 0;
assign FWriteIntE = 0;
assign FWriteIntM = 0;
assign FWriteIntW = 0;
assign FWriteDataE = 0;
assign FIntResM = 0;
assign FDivBusyE = 0;
assign IllegalFPUInstrD = 1;
assign SetFflagsM = 0;
assign FPUResultW = 0;
end
endgenerate
endmodule // fpu

14
wally-pipelined/src/generic/shift.sv
View File

@ -38,13 +38,12 @@ module shift_right #(parameter WIDTH=8)
assign stage[0] = A;
generate
for (i=0;i<$clog2(WIDTH);i=i+1)
begin : genbit
mux2 #(WIDTH) mux_inst (stage[i],
for (i=0;i<$clog2(WIDTH);i=i+1) begin : genbit
mux2 #(WIDTH) mux_inst (stage[i],
{{(WIDTH/(2**(i+1))){1'b0}}, stage[i][WIDTH-1:WIDTH/(2**(i+1))]},
Shift[$clog2(WIDTH)-i-1],
stage[i+1]);
end
end
endgenerate
assign Z = stage[$clog2(WIDTH)];
@ -60,13 +59,12 @@ module shift_left #(parameter WIDTH=8)
assign stage[0] = A;
generate
for (i=0;i<$clog2(WIDTH);i=i+1)
begin : genbit
mux2 #(WIDTH) mux_inst (stage[i],
for (i=0;i<$clog2(WIDTH);i=i+1) begin : genbit
mux2 #(WIDTH) mux_inst (stage[i],
{stage[i][WIDTH-1-WIDTH/(2**(i+1)):0], {(WIDTH/(2**(i+1))){1'b0}}},
Shift[$clog2(WIDTH)-i-1],
stage[i+1]);
end
end
endgenerate
assign Z = stage[$clog2(WIDTH)];

2
wally-pipelined/src/ieu/alu.sv
View File

@ -42,7 +42,7 @@ module alu #(parameter WIDTH=32) (
assign {carry, presum} = a + condinvb + {{(WIDTH-1){1'b0}},alucontrol[3]};
// support W-type RV64I ADDW/SUBW/ADDIW that sign-extend 32-bit result to 64 bits
generate
generate
if (WIDTH==64)
assign sum = w64 ? {{32{presum[31]}}, presum[31:0]} : presum;
else

2
wally-pipelined/src/ieu/datapath.sv
View File

@ -129,7 +129,7 @@ module datapath (
flopenrc #(5) RdWEg(clk, reset, FlushW, ~StallW, RdM, RdW);
// handle Store Conditional result if atomic extension supported
generate
generate
if (`A_SUPPORTED)
assign SCResultW = SquashSCW ? {{(`XLEN-1){1'b0}}, 1'b1} : {{(`XLEN-1){1'b0}}, 1'b0};
else

8
wally-pipelined/src/ifu/SRAM2P1R1W.sv
View File

@ -97,11 +97,11 @@ module SRAM2P1R1W
// write port
generate
for (index = 0; index < Width; index = index + 1) begin
for (index = 0; index < Width; index = index + 1) begin:mem
always_ff @ (posedge clk) begin
if (WEN1Q & BitWEN1[index]) begin
memory[WA1Q][index] <= WD1Q[index];
end
if (WEN1Q & BitWEN1[index]) begin
memory[WA1Q][index] <= WD1Q[index];
end
end
end
endgenerate

2
wally-pipelined/src/ifu/ifu.sv
View File

@ -188,7 +188,7 @@ module ifu (
flopenl #(`XLEN) pcreg(clk, reset, ~StallF & ~ICacheStallF, PCNextF, `RESET_VECTOR, PCF);
// branch and jump predictor
generate
generate
if (`BPRED_ENABLED == 1) begin : bpred
// I am making the port connection explicit for now as I want to see them and they will be changing.
bpred bpred(.*,

2
wally-pipelined/src/ifu/localHistoryPredictor.sv
View File

@ -67,7 +67,7 @@ module localHistoryPredictor
genvar index;
generate
for (index = 0; index < 2**m; index = index +1) begin
for (index = 0; index < 2**m; index = index +1) begin:localhist
flopenr #(k) LocalHistoryRegister(.clk(clk),
.reset(reset),

2
wally-pipelined/src/lsu/dcache.sv
View File

@ -151,7 +151,7 @@ module dcachecontroller #(parameter LINESIZE = 256) (
genvar i;
generate
for (i=0; i < WORDSPERLINE; i++) begin
for (i=0; i < WORDSPERLINE; i++) begin:sb
flopenr #(`XLEN) flop(clk, reset, FetchState & (i == FetchWordNum), ReadDataW, DCacheMemWriteData[(i+1)*`XLEN-1:i*`XLEN]);
end
endgenerate

12
wally-pipelined/src/lsu/lsu.sv
View File

@ -64,7 +64,7 @@ module lsu (
output logic [1:0] AtomicMaskedM,
input logic MemAckW, // from ahb
input logic [`XLEN-1:0] HRDATAW, // from ahb
output logic [2:0] Funct3MfromLSU,
output logic [2:0] SizeFromLSU,
output logic StallWfromLSU,
@ -132,7 +132,7 @@ module lsu (
logic MMUTranslate;
logic HPTWRead;
logic [1:0] MemRWMtoLSU;
logic [2:0] Funct3MtoLSU;
logic [2:0] SizeToLSU;
logic [1:0] AtomicMtoLSU;
logic [`XLEN-1:0] MemAdrMtoLSU;
logic [`XLEN-1:0] WriteDataMtoLSU;
@ -204,7 +204,7 @@ module lsu (
// LSU
.DisableTranslation(DisableTranslation),
.MemRWMtoLSU(MemRWMtoLSU),
.Funct3MtoLSU(Funct3MtoLSU),
.SizeToLSU(SizeToLSU),
.AtomicMtoLSU(AtomicMtoLSU),
.MemAdrMtoLSU(MemAdrMtoLSU),
.WriteDataMtoLSU(WriteDataMtoLSU), // *** ??????????????
@ -220,7 +220,7 @@ module lsu (
mmu #(.TLB_ENTRIES(`DTLB_ENTRIES), .IMMU(0))
dmmu(.TLBAccessType(MemRWMtoLSU),
.VirtualAddress(MemAdrMtoLSU),
.Size(Funct3MtoLSU[1:0]),
.Size(SizeToLSU[1:0]),
.PTEWriteVal(PageTableEntryM),
.PageTypeWriteVal(PageTypeM),
.TLBWrite(DTLBWriteM),
@ -244,7 +244,7 @@ module lsu (
// Determine if an Unaligned access is taking place
always_comb
case(Funct3MtoLSU[1:0])
case(SizeToLSU[1:0])
2'b00: DataMisalignedMfromLSU = 0; // lb, sb, lbu
2'b01: DataMisalignedMfromLSU = MemAdrMtoLSU[0]; // lh, sh, lhu
2'b10: DataMisalignedMfromLSU = MemAdrMtoLSU[1] | MemAdrMtoLSU[0]; // lw, sw, flw, fsw, lwu
@ -400,7 +400,7 @@ module lsu (
end // always_comb
// *** for now just pass through size
assign Funct3MfromLSU = Funct3MtoLSU;
assign SizeFromLSU = SizeToLSU;
assign StallWfromLSU = StallWtoLSU;

10
wally-pipelined/src/lsu/lsuArb.sv
View File

@ -54,7 +54,7 @@ module lsuArb
// to LSU
output logic DisableTranslation,
output logic [1:0] MemRWMtoLSU,
output logic [2:0] Funct3MtoLSU,
output logic [2:0] SizeToLSU,
output logic [1:0] AtomicMtoLSU,
output logic [`XLEN-1:0] MemAdrMtoLSU,
output logic [`XLEN-1:0] WriteDataMtoLSU,
@ -87,6 +87,7 @@ module lsuArb
statetype CurrState, NextState;
logic SelPTW;
logic HPTWStallD;
logic [2:0] PTWSize;
flopenl #(.TYPE(statetype)) StateReg(.clk(clk),
@ -138,12 +139,9 @@ module lsuArb
assign MemRWMtoLSU = SelPTW ? {HPTWRead, 1'b0} : MemRWM;
generate
if (`XLEN == 32) begin
assign Funct3MtoLSU = SelPTW ? 3'b010 : Funct3M;
end else begin
assign Funct3MtoLSU = SelPTW ? 3'b011 : Funct3M;
end
assign PTWSize = (`XLEN==32 ? 3'b010 : 3'b011); // 32 or 64-bit access from htpw
endgenerate
mux2 #(3) sizemux(Funct3M, PTWSize, SelPTW, SizeToLSU);
assign AtomicMtoLSU = SelPTW ? 2'b00 : AtomicM;
assign MemAdrMtoLSU = SelPTW ? HPTWPAdr : MemAdrM;

3
wally-pipelined/src/mmu/pmpadrdec.sv
View File

@ -76,8 +76,9 @@ module pmpadrdec (
generate
assign Mask[1:0] = 2'b11;
assign Mask[2] = (AdrMode == NAPOT); // mask has 0s in upper bis for NA4 region
for (i=3; i < `PA_BITS; i=i+1)
for (i=3; i < `PA_BITS; i=i+1) begin:mask
assign Mask[i] = Mask[i-1] & PMPAdr[i-3]; // NAPOT mask: 1's indicate bits to ignore
end
endgenerate
// verilator lint_on UNOPTFLAT

7
wally-pipelined/src/mmu/pmpchecker.sv
View File

@ -63,12 +63,6 @@ module pmpchecker (
// verilator lint_on UNOPTFLAT
logic [`PMP_ENTRIES-1:0] PAgePMPAdr; // for TOR PMP matching, PhysicalAddress > PMPAdr[i]
genvar i,j;
/*
generate // extract 8-bit chunks from PMPCFG array
for (j=0; j<`PMP_ENTRIES; j = j+8)
assign {PMPCfg[j+7], PMPCfg[j+6], PMPCfg[j+5], PMPCfg[j+4],
PMPCfg[j+3], PMPCfg[j+2], PMPCfg[j+1], PMPCfg[j]} = PMPCFG_ARRAY_REGW[j/8];
endgenerate */
pmpadrdec pmpadrdecs[`PMP_ENTRIES-1:0](
.PhysicalAddress,
@ -80,7 +74,6 @@ module pmpchecker (
.NoLowerMatchOut(NoLowerMatch),
.Match, .Active, .L, .X, .W, .R);
// 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 : |Active;

9
wally-pipelined/src/mmu/tlb.sv
View File

@ -111,6 +111,7 @@ module tlb #(parameter TLB_ENTRIES = 8,
logic [1:0] HitPageType;
logic CAMHit;
logic [`ASID_BITS-1:0] ASID;
logic DAFault;
// Grab the sv mode from SATP and determine whether translation should occur
assign SvMode = SATP_REGW[`XLEN-1:`XLEN-`SVMODE_BITS];
@ -165,7 +166,9 @@ module tlb #(parameter TLB_ENTRIES = 8,
// only execute non-user mode pages.
assign ImproperPrivilege = ((EffectivePrivilegeMode == `U_MODE) && ~PTE_U) ||
((EffectivePrivilegeMode == `S_MODE) && PTE_U);
assign TLBPageFault = Translate && TLBHit && (ImproperPrivilege || ~PTE_X);
// fault for software handling if access bit is off
assign DAFault = ~PTE_A;
assign TLBPageFault = Translate && TLBHit && (ImproperPrivilege || ~PTE_X || DAFault);
end else begin
logic ImproperPrivilege, InvalidRead, InvalidWrite;
@ -180,7 +183,9 @@ module tlb #(parameter TLB_ENTRIES = 8,
// Check for write error. Writes are invalid when the page's write bit is
// low.
assign InvalidWrite = WriteAccess && ~PTE_W;
assign TLBPageFault = Translate && TLBHit && (ImproperPrivilege || InvalidRead || InvalidWrite);
// Fault for software handling if access bit is off or writing a page with dirty bit off
assign DAFault = ~PTE_A | WriteAccess & ~PTE_D;
assign TLBPageFault = Translate && TLBHit && (ImproperPrivilege || InvalidRead || InvalidWrite || DAFault);
end
endgenerate

3
wally-pipelined/src/mmu/tlbpriority.sv
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@ -41,8 +41,9 @@ module tlbpriority #(parameter ENTRIES = 8) (
genvar i;
generate
assign nolower[0] = 1;
for (i=1; i<ENTRIES; i++)
for (i=1; i<ENTRIES; i++) begin:therm
assign nolower[i] = nolower[i-1] & ~a[i-1];
end
endgenerate
// verilator lint_on UNOPTFLAT
assign y = a & nolower;

7
wally-pipelined/src/muldiv/div.sv
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@ -299,10 +299,9 @@ module csa #(parameter WIDTH=8) (input logic [WIDTH-1:0] a, b, c,
logic [WIDTH:0] carry_temp;
genvar i;
generate
for (i=0;i<WIDTH;i=i+1)
begin : genbit
fa fa_inst (a[i], b[i], c[i], sum[i], carry_temp[i+1]);
end
for (i=0;i<WIDTH;i=i+1) begin : genbit
fa fa_inst (a[i], b[i], c[i], sum[i], carry_temp[i+1]);
end
endgenerate
assign carry = {carry_temp[WIDTH-1:1], 1'b0};

4
wally-pipelined/src/muldiv/muldiv.sv
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@ -138,7 +138,9 @@ module muldiv (
flopenrc #(`XLEN) MulDivResultWReg(clk, reset, FlushW, ~StallW, MulDivResultM, MulDivResultW);
end else begin // no M instructions supported
assign MulDivResultW = 0;
assign MulDivResultW = 0;
assign DivBusyE = 0;
assign DivDoneE = 0;
end
endgenerate

2
wally-pipelined/src/privileged/csrc.sv
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@ -87,7 +87,7 @@ module csrc #(parameter
output logic IllegalCSRCAccessM
);
generate
generate
if (`ZCOUNTERS_SUPPORTED) begin
// logic [63:0] TIME_REGW, TIMECMP_REGW;
logic [63:0] CYCLE_REGW, INSTRET_REGW;

2
wally-pipelined/src/privileged/csri.sv
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@ -70,7 +70,7 @@ module csri #(parameter
// MEIP, MTIP, MSIP are read-only
// SEIP, STIP, SSIP is writable in MIP if S mode exists
// SSIP is writable in SIP if S mode exists
generate
generate
if (`S_SUPPORTED) begin
assign MIP_WRITE_MASK = 12'h222; // SEIP, STIP, SSIP are writable in MIP (20210108-draft 3.1.9)
assign SIP_WRITE_MASK = 12'h002; // SSIP is writable in SIP (privileged 20210108-draft 4.1.3)

2
wally-pipelined/src/privileged/csrn.sv
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@ -49,7 +49,7 @@ module csrn #(parameter
);
// User mode CSRs below only needed when user mode traps are supported
generate
generate
if (`N_SUPPORTED) begin
logic WriteUTVECM;
logic WriteUSCRATCHM, WriteUEPCM;

2
wally-pipelined/src/privileged/csrs.sv
View File

@ -66,7 +66,7 @@ module csrs #(parameter
//logic [`XLEN-1:0] SEDELEG_MASK = ~(zero | 3'b111 << 9); // sedeleg[11:9] hardwired to zero per Privileged Spec 3.1.8
// Supervisor mode CSRs sometimes supported
generate
generate
if (`S_SUPPORTED) begin
logic WriteSTVECM;
logic WriteSSCRATCHM, WriteSEPCM;

2
wally-pipelined/src/privileged/csru.sv
View File

@ -43,7 +43,7 @@ module csru #(parameter
);
// Floating Point CSRs in User Mode only needed if Floating Point is supported
generate
generate
if (`F_SUPPORTED | `D_SUPPORTED) begin
logic [4:0] FFLAGS_REGW;
logic WriteFFLAGSM, WriteFRMM; //, WriteFCSRM;

2
wally-pipelined/src/uncore/gpio.sv
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@ -151,7 +151,7 @@ module gpio (
end
// chip i/o
generate
generate
if (`GPIO_LOOPBACK_TEST) // connect OUT to IN for loopback testing
assign input0d = GPIOPinsOut & input_en & output_en;
else

44
wally-pipelined/src/uncore/plic.sv
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@ -164,17 +164,13 @@ module plic (
flopr #(N) intPendingFlop(HCLK,~HRESETn,nextIntPending,intPending);
// pending array - indexed by priority_lvl x source_ID
genvar i;
genvar i, j;
generate
for (i=1; i<=N; i=i+1) begin
// *** make sure that this synthesizes into N decoders, not 7*N 3-bit equality comparators (right?)
assign pendingArray[7][i] = (intPriority[i]==7) & intEn[i] & intPending[i];
assign pendingArray[6][i] = (intPriority[i]==6) & intEn[i] & intPending[i];
assign pendingArray[5][i] = (intPriority[i]==5) & intEn[i] & intPending[i];
assign pendingArray[4][i] = (intPriority[i]==4) & intEn[i] & intPending[i];
assign pendingArray[3][i] = (intPriority[i]==3) & intEn[i] & intPending[i];
assign pendingArray[2][i] = (intPriority[i]==2) & intEn[i] & intPending[i];
assign pendingArray[1][i] = (intPriority[i]==1) & intEn[i] & intPending[i];
for (j=1; j<=7; j++) begin: pending
for (i=1; i<=N; i=i+1) begin: pendingbit
// *** make sure that this synthesizes into N decoders, not 7*N 3-bit equality comparators (right?)
assign pendingArray[j][i] = (intPriority[i]==j) & intEn[i] & intPending[i];
end
end
endgenerate
// pending array, except grouped by priority
@ -184,7 +180,9 @@ module plic (
|pendingArray[4],
|pendingArray[3],
|pendingArray[2],
|pendingArray[1]};
|pendingArray[1]};
//assign pendingPGrouped = pendingArray.or;
// pendingPGrouped, except only topmost priority is active
assign pendingMaxP[7:1] = {pendingPGrouped[7],
pendingPGrouped[6] & ~|pendingPGrouped[7],
@ -202,24 +200,24 @@ module plic (
| ({N{pendingMaxP[2]}} & pendingArray[2])
| ({N{pendingMaxP[1]}} & pendingArray[1]);
// find the lowest ID amongst active interrupts at the highest priority
integer j;
// *** verify that this synthesizes to a reasonable priority encoder and that j doesn't actually exist in hardware
int k;
// *** verify that this synthesizes to a reasonable priority encoder and that k doesn't actually exist in hardware
always_comb begin
intClaim = 6'b0;
for(j=N; j>0; j=j-1) begin
if(pendingRequestsAtMaxP[j]) intClaim = j[5:0];
for(k=N; k>0; k=k-1) begin
if(pendingRequestsAtMaxP[k]) intClaim = k[5:0];
end
end
// create threshold mask
always_comb begin
threshMask[7] = ~(7==intThreshold);
threshMask[6] = ~(6==intThreshold) & threshMask[7];
threshMask[5] = ~(5==intThreshold) & threshMask[6];
threshMask[4] = ~(4==intThreshold) & threshMask[5];
threshMask[3] = ~(3==intThreshold) & threshMask[4];
threshMask[2] = ~(2==intThreshold) & threshMask[3];
threshMask[1] = ~(1==intThreshold) & threshMask[2];
always_comb begin
threshMask[7] = (intThreshold != 7);
threshMask[6] = (intThreshold != 6) & threshMask[7];
threshMask[5] = (intThreshold != 5) & threshMask[6];
threshMask[4] = (intThreshold != 4) & threshMask[5];
threshMask[3] = (intThreshold != 3) & threshMask[4];
threshMask[2] = (intThreshold != 2) & threshMask[3];
threshMask[1] = (intThreshold != 1) & threshMask[2];
end
// is the max priority > threshold?
// *** would it be any better to first priority encode maxPriority into binary and then ">" with threshold?

2
wally-pipelined/src/uncore/uartPC16550D.sv
View File

@ -291,7 +291,7 @@ module uartPC16550D(
// although rxfullbit looks like a combinational loop, in one bit rxfifotail == i and breaks the loop
generate
genvar i;
for (i=0; i<16; i++) begin
for (i=0; i<16; i++) begin:rx
assign RXerrbit[i] = |rxfifo[i][10:8]; // are any of the error conditions set?
if (i > 0)
assign rxfullbit[i] = ((rxfifohead==i) | rxfullbit[i-1]) & (rxfifotail != i);

8
wally-pipelined/src/wally/wallypipelinedhart.sv
View File

@ -159,7 +159,7 @@ module wallypipelinedhart
// IEU vs HPTW arbitration signals to send to LSU
logic [1:0] MemRWMtoLSU;
logic [2:0] Funct3MtoLSU;
logic [2:0] SizeToLSU;
logic [1:0] AtomicMtoLSU;
logic [`XLEN-1:0] MemAdrMtoLSU;
logic [`XLEN-1:0] WriteDataMtoLSU;
@ -169,7 +169,7 @@ module wallypipelinedhart
logic DataMisalignedMfromLSU;
logic StallWtoLSU;
logic StallWfromLSU;
logic [2:0] Funct3MfromLSU;
logic [2:0] SizeFromLSU;
ifu ifu(.InstrInF(InstrRData),
@ -207,7 +207,7 @@ module wallypipelinedhart
.AtomicMaskedM(AtomicMaskedM),
.MemAckW(MemAckW),
.HRDATAW(HRDATAW),
.Funct3MfromLSU(Funct3MfromLSU), // stays the same
.SizeFromLSU(SizeFromLSU), // stays the same
.StallWfromLSU(StallWfromLSU), // stays the same
.DSquashBusAccessM(DSquashBusAccessM), // probalby removed after dcache implemenation?
// currently not connected (but will need to be used for lsu talking to ahb.
@ -261,7 +261,7 @@ module wallypipelinedhart
//.InstrRData(InstrF), // hook up InstrF later
.ISquashBusAccessF(1'b0), // *** temporary hack to disable PMP instruction fetch checking
.WriteDataM(WriteDataM),
.MemSizeM(Funct3MfromLSU[1:0]), .UnsignedLoadM(Funct3MfromLSU[2]),
.MemSizeM(SizeFromLSU[1:0]), .UnsignedLoadM(SizeFromLSU[2]),
.Funct7M(InstrM[31:25]),
.HRDATAW(HRDATAW),
.StallW(StallWfromLSU),

14
wally-pipelined/testbench/testbench-imperas.sv
View File

@ -514,6 +514,9 @@ string tests32f[] = '{
logic HMASTLOCK;
logic HCLK, HRESETn;
logic [`XLEN-1:0] PCW;
logic [`XLEN-1:0] debug;
assign debug = dut.uncore.dtim.RAM[536872960];
flopenr #(`XLEN) PCWReg(clk, reset, ~dut.hart.ieu.dp.StallW, dut.hart.ifu.PCM, PCW);
flopenr #(32) InstrWReg(clk, reset, ~dut.hart.ieu.dp.StallW, dut.hart.ifu.InstrM, InstrW);
@ -656,10 +659,7 @@ string tests32f[] = '{
// Check errors
errors = (i == SIGNATURESIZE+1); // error if file is empty
i = 0;
if (`XLEN == 32)
testadr = (`TIM_BASE+tests[test+1].atohex())/4;
else
testadr = (`TIM_BASE+tests[test+1].atohex())/8;
testadr = (`TIM_BASE+tests[test+1].atohex())/(`XLEN/8);
/* verilator lint_off INFINITELOOP */
while (signature[i] !== 'bx) begin
//$display("signature[%h] = %h", i, signature[i]);
@ -669,14 +669,16 @@ string tests32f[] = '{
// kind of hacky test for garbage right now
errors = errors+1;
$display(" Error on test %s result %d: adr = %h sim = %h, signature = %h",
tests[test], i, (testadr+i)*`XLEN/8, dut.uncore.dtim.RAM[testadr+i], signature[i]);
tests[test], i, (testadr+i)*(`XLEN/8), dut.uncore.dtim.RAM[testadr+i], signature[i]);
$stop;//***debug
end
end
i = i + 1;
end
/* verilator lint_on INFINITELOOP */
if (errors == 0) $display("%s succeeded. Brilliant!!!", tests[test]);
if (errors == 0) begin
$display("%s succeeded. Brilliant!!!", tests[test]);
end
else begin
$display("%s failed with %d errors. :(", tests[test], errors);
totalerrors = totalerrors+1;