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

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This commit is contained in:
David Harris 2021-11-17 13:28:33 -08:00
commit 0a281a06e0
11 changed files with 139 additions and 80 deletions
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26
Makefile Normal file
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@ -0,0 +1,26 @@
make all: submodules other
submodules: addins/riscv-isa-sim addins/riscv-arch-test
cd addins;git init; git submodule add https://github.com/riscv-non-isa/riscv-arch-test; git submodule add https://github.com/riscv-software-src/riscv-isa-sim
git submodule update --init --recursive
other:
cp -r addins/riscv-isa-sim/arch_test_target/spike/device/rv32i_m/I addins/riscv-isa-sim/arch_test_target/spike/device/rv32i_m/F
cp -r addins/riscv-isa-sim/arch_test_target/spike/device/rv32i_m/I addins/riscv-isa-sim/arch_test_target/spike/device/rv32i_m/D
sed -i 's/--isa=rv32i /--isa=32if/' addins/riscv-isa-sim/arch_test_target/spike/device/rv32i_m/F/Makefile.include
sed -i 's/--isa=rv32i /--isa=32if/' addins/riscv-isa-sim/arch_test_target/spike/device/rv32i_m/D/Makefile.include
ifneq ("$(wildcard $(addins/riscv-isa-sim/build/.*))",)
else
mkdir addins/riscv-isa-sim/build
endif
cd addins/riscv-isa-sim/build; ../configure --prefix=/cad/riscv/gcc/bin
make -C addins/riscv-isa-sim/
sed -i '/export TARGETDIR ?=/c\export TARGETDIR ?= /home/harris/riscv-wally/addins/riscv-isa-sim/arch_test_target' tests/wally-riscv-arch-test/Makefile.include
echo export RISCV_PREFIX = riscv64-unknown-elf- >> tests/wally-riscv-arch-test/Makefile.include
make -C tests/wally-riscv-arch-test
make -C tests/wally-riscv-arch-test XLEN=32
cd tests/wally-riscv-arch-test; exe2memfile.pl work/*/*/*.elf
make -C wally-pipelined/regression

2
README.md
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@ -39,7 +39,7 @@ cd ../wally-riscv-arch-test
make
make XLEN=32
exe2memfile.pl work/*/*/*.elf # converts ELF files to a format that can be read by Modelsim
cd ../../tests/linux-testgen/linux-testvectors
cd ../linux-testgen/linux-testvectors
./tvLinker.sh
```

6
wally-pipelined/regression/Makefile
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@ -1,6 +1,6 @@
make all:
make ../../tests/imperas-riscv-tests/
make ../../tests/wally-riscv-arch-test/
make XLEN=32 ../../tests/wally-riscv-arch-test/
make -C ../../tests/imperas-riscv-tests/
make -C ../../tests/wally-riscv-arch-test/
make -C XLEN=32 ../../tests/wally-riscv-arch-test/
exe2memfile.pl ../../tests/wally-riscv-arch-test/work/*/*/*.elf
cd ../../tests/linux-testgen/linux-testvectors/;./tvLinker.sh

2
wally-pipelined/regression/wave-all.do
View File

@ -492,7 +492,7 @@ add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/RdD
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/RD1E
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/RD2E
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/ExtImmE
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/PreSrcAE
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/ForwardedSrcAE
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/SrcAE
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/SrcBE
add wave -noupdate -radix hexadecimal /testbench/dut/hart/ieu/dp/ALUResultE

14
wally-pipelined/src/ieu/datapath.sv
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@ -43,6 +43,7 @@ module datapath (
input logic [`XLEN-1:0] PCLinkE,
output logic [2:0] FlagsE,
output logic [`XLEN-1:0] PCTargetE,
output logic [`XLEN-1:0] ForwardedSrcAE, ForwardedSrcBE, // *** these are the src outputs before the mux choosing between them and PCE to put in srcA/B
output logic [`XLEN-1:0] SrcAE, SrcBE,
// Memory stage signals
input logic StallM, FlushM,
@ -73,7 +74,8 @@ module datapath (
logic [`XLEN-1:0] RD1E, RD2E;
logic [`XLEN-1:0] ExtImmE;
logic [`XLEN-1:0] PreSrcAE, PreSrcBE, SrcAE2, SrcBE2;
// logic [`XLEN-1:0] ForwardedSrcAE, ForwardedSrcBE, SrcAE2, SrcBE2; // *** MAde forwardedsrcae an output to get rid of a mux in the critical path.
logic [`XLEN-1:0] SrcAE2, SrcBE2;
logic [`XLEN-1:0] ALUResultE;
logic [`XLEN-1:0] WriteDataE;
@ -104,12 +106,12 @@ module datapath (
flopenrc #(5) Rs2EReg(clk, reset, FlushE, ~StallE, Rs2D, Rs2E);
flopenrc #(5) RdEReg(clk, reset, FlushE, ~StallE, RdD, RdE);
mux3 #(`XLEN) faemux(RD1E, WriteDataW, ResultM, ForwardAE, PreSrcAE);
mux3 #(`XLEN) fbemux(RD2E, WriteDataW, ResultM, ForwardBE, PreSrcBE);
mux2 #(`XLEN) writedatamux(PreSrcBE, FWriteDataE, ~IllegalFPUInstrE, WriteDataE);
mux2 #(`XLEN) srcamux(PreSrcAE, PCE, ALUSrcAE, SrcAE);
mux3 #(`XLEN) faemux(RD1E, WriteDataW, ResultM, ForwardAE, ForwardedSrcAE);
mux3 #(`XLEN) fbemux(RD2E, WriteDataW, ResultM, ForwardBE, ForwardedSrcBE);
mux2 #(`XLEN) writedatamux(ForwardedSrcBE, FWriteDataE, ~IllegalFPUInstrE, WriteDataE);
mux2 #(`XLEN) srcamux(ForwardedSrcAE, PCE, ALUSrcAE, SrcAE);
mux2 #(`XLEN) srcamux2(SrcAE, PCLinkE, JumpE, SrcAE2);
mux2 #(`XLEN) srcbmux(PreSrcBE, ExtImmE, ALUSrcBE, SrcBE);
mux2 #(`XLEN) srcbmux(ForwardedSrcBE, ExtImmE, ALUSrcBE, SrcBE);
mux2 #(`XLEN) srcbmux2(SrcBE, {`XLEN{1'b0}}, JumpE, SrcBE2); // *** May be able to remove this mux.
alu #(`XLEN) alu(SrcAE2, SrcBE2, ALUControlE, ALUResultE, FlagsE);
mux2 #(`XLEN) targetsrcmux(PCE, SrcAE, TargetSrcE, TargetBaseE);

1
wally-pipelined/src/ieu/ieu.sv
View File

@ -40,6 +40,7 @@ module ieu (
output logic [`XLEN-1:0] PCTargetE,
output logic MulDivE, W64E,
output logic [2:0] Funct3E,
output logic [`XLEN-1:0] ForwardedSrcAE, ForwardedSrcBE, // *** these are the src outputs before the mux choosing between them and PCE to put in srcA/B
output logic [`XLEN-1:0] SrcAE, SrcBE,
input logic FWriteIntM,

13
wally-pipelined/src/muldiv/intdivrestoring.sv
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@ -33,7 +33,8 @@ module intdivrestoring (
input logic StallM,
input logic DivSignedE, W64E,
input logic DivE,
input logic [`XLEN-1:0] SrcAE, SrcBE,
//input logic [`XLEN-1:0] SrcAE, SrcBE,
input logic [`XLEN-1:0] ForwardedSrcAE, ForwardedSrcBE, // *** these are the src outputs before the mux choosing between them and PCE to put in srcA/B
output logic DivBusyE,
output logic [`XLEN-1:0] QuotM, RemM
);
@ -61,11 +62,11 @@ module intdivrestoring (
// Handle sign extension for W-type instructions
generate
if (`XLEN == 64) begin // RV64 has W-type instructions
mux2 #(`XLEN) xinmux(SrcAE, {SrcAE[31:0], 32'b0}, W64E, XinE);
mux2 #(`XLEN) dinmux(SrcBE, {{32{SrcBE[31]&DivSignedE}}, SrcBE[31:0]}, W64E, DinE);
mux2 #(`XLEN) xinmux(ForwardedSrcAE, {ForwardedSrcAE[31:0], 32'b0}, W64E, XinE);
mux2 #(`XLEN) dinmux(ForwardedSrcBE, {{32{ForwardedSrcBE[31]&DivSignedE}}, ForwardedSrcBE[31:0]}, W64E, DinE);
end else begin // RV32 has no W-type instructions
assign XinE = SrcAE;
assign DinE = SrcBE;
assign XinE = ForwardedSrcAE;
assign DinE = ForwardedSrcBE;
end
endgenerate
@ -79,7 +80,7 @@ module intdivrestoring (
neg #(`XLEN) negd(DinE, DnE);
mux2 #(`XLEN) dabsmux(DnE, DinE, SignDE, DAbsBE); // take absolute value for signed operations, and negate for subtraction setp
neg #(`XLEN) negx(XinE, XnE);
mux3 #(`XLEN) xabsmux(XinE, XnE, SrcAE, {Div0E, SignXE}, XInitE); // take absolute value for signed operations, or keep original value for divide by 0
mux3 #(`XLEN) xabsmux(XinE, XnE, ForwardedSrcAE, {Div0E, SignXE}, XInitE); // take absolute value for signed operations, or keep original value for divide by 0
// initialization multiplexers on first cycle of operation
mux2 #(`XLEN) wmux(WM[`DIV_BITSPERCYCLE], {`XLEN{1'b0}}, DivStartE, WNextE);

15
wally-pipelined/src/muldiv/mul.sv
View File

@ -29,7 +29,8 @@ module mul (
// Execute Stage interface
input logic clk, reset,
input logic StallM, FlushM,
input logic [`XLEN-1:0] SrcAE, SrcBE,
// input logic [`XLEN-1:0] SrcAE, SrcBE,
input logic [`XLEN-1:0] ForwardedSrcAE, ForwardedSrcBE, // *** these are the src outputs before the mux choosing between them and PCE to put in srcA/B
input logic [2:0] Funct3E,
output logic [`XLEN*2-1:0] ProdM
);
@ -59,12 +60,12 @@ module mul (
// Execute Stage: Compute partial products
//////////////////////////////
assign Aprime = {1'b0, SrcAE[`XLEN-2:0]};
assign Bprime = {1'b0, SrcBE[`XLEN-2:0]};
assign Aprime = {1'b0, ForwardedSrcAE[`XLEN-2:0]};
assign Bprime = {1'b0, ForwardedSrcBE[`XLEN-2:0]};
redundantmul #(`XLEN) bigmul(.a(Aprime), .b(Bprime), .out0(PP0E), .out1(PP1E));
assign PA = {(`XLEN-1){SrcAE[`XLEN-1]}} & SrcBE[`XLEN-2:0];
assign PB = {(`XLEN-1){SrcBE[`XLEN-1]}} & SrcAE[`XLEN-2:0];
assign PP = SrcAE[`XLEN-1] & SrcBE[`XLEN-1];
assign PA = {(`XLEN-1){ForwardedSrcAE[`XLEN-1]}} & ForwardedSrcBE[`XLEN-2:0];
assign PB = {(`XLEN-1){ForwardedSrcBE[`XLEN-1]}} & ForwardedSrcAE[`XLEN-2:0];
assign PP = ForwardedSrcAE[`XLEN-1] & ForwardedSrcBE[`XLEN-1];
// flavor of multiplication
assign MULH = (Funct3E == 3'b001);
@ -88,6 +89,6 @@ module mul (
flopenrc #(`XLEN*2) PP3Reg(clk, reset, FlushM, ~StallM, PP3E, PP3M);
flopenrc #(`XLEN*2) PP4Reg(clk, reset, FlushM, ~StallM, PP4E, PP4M);
assign ProdM = PP0M + PP1M + PP2M + PP3M + PP4M; //SrcAE * SrcBE;
assign ProdM = PP0M + PP1M + PP2M + PP3M + PP4M; //ForwardedSrcAE * ForwardedSrcBE;
endmodule

5
wally-pipelined/src/muldiv/muldiv.sv
View File

@ -28,7 +28,8 @@
module muldiv (
input logic clk, reset,
// Execute Stage interface
input logic [`XLEN-1:0] SrcAE, SrcBE,
// input logic [`XLEN-1:0] SrcAE, SrcBE,
input logic [`XLEN-1:0] ForwardedSrcAE, ForwardedSrcBE, // *** these are the src outputs before the mux choosing between them and PCE to put in srcA/B
input logic [2:0] Funct3E, Funct3M,
input logic MulDivE, W64E,
// Writeback stage
@ -58,7 +59,7 @@ module muldiv (
assign DivE = MulDivE & Funct3E[2];
assign DivSignedE = ~Funct3E[0];
intdivrestoring div(.clk, .reset, .StallM,
.DivSignedE, .W64E, .DivE, .SrcAE, .SrcBE, .DivBusyE, .QuotM, .RemM);
.DivSignedE, .W64E, .DivE, .ForwardedSrcAE, .ForwardedSrcBE, .DivBusyE, .QuotM, .RemM);
// Result multiplexer
always_comb

87
wally-pipelined/src/wally/wallypipelinedhart.sv
View File

@ -59,7 +59,7 @@ module wallypipelinedhart (
logic CSRReadM, CSRWriteM, PrivilegedM;
logic [1:0] AtomicE;
logic [1:0] AtomicM;
logic [`XLEN-1:0] SrcAE, SrcBE;
logic [`XLEN-1:0] ForwardedSrcAE, ForwardedSrcBE, SrcAE, SrcBE;
logic [`XLEN-1:0] SrcAM;
logic [2:0] Funct3E;
// logic [31:0] InstrF;
@ -155,31 +155,82 @@ module wallypipelinedhart (
ifu ifu(
.clk, .reset,
.StallF, .StallD, .StallE, .StallM, .StallW,
.FlushF, .FlushD, .FlushE, .FlushM, .FlushW,
.InstrInF(InstrRData), .InstrAckF, .PCF, .InstrPAdrF, .InstrReadF, .ICacheStallF,
.clk, .reset,
.StallF, .StallD, .StallE, .StallM, .StallW,
.FlushF, .FlushD, .FlushE, .FlushM, .FlushW,
// Fetch
.InstrInF(InstrRData), .InstrAckF, .PCF, .InstrPAdrF,
.InstrReadF, .ICacheStallF,
// Execute
.PCLinkE, .PCSrcE, .PCTargetE, .PCE,
.BPPredWrongE,
.RetM, .TrapM,
.PrivilegedNextPCM, .InvalidateICacheM,
.InstrD, .InstrM,
.PCM, .InstrClassM,
.BPPredDirWrongM,.BTBPredPCWrongM,.RASPredPCWrongM, .BPPredClassNonCFIWrongM,
.IllegalBaseInstrFaultD, .ITLBInstrPageFaultF, .IllegalIEUInstrFaultD,
.InstrMisalignedFaultM, .InstrMisalignedAdrM,
// Mem
.RetM, .TrapM, .PrivilegedNextPCM, .InvalidateICacheM,
.InstrD, .InstrM, . PCM, .InstrClassM, .BPPredDirWrongM,
.BTBPredPCWrongM, .RASPredPCWrongM, .BPPredClassNonCFIWrongM,
// Writeback
// output logic
// Faults
.IllegalBaseInstrFaultD, .ITLBInstrPageFaultF,
.IllegalIEUInstrFaultD, .InstrMisalignedFaultM,
.InstrMisalignedAdrM,
// mmu management
.PrivilegeModeW, .PTE, .PageType, .SATP_REGW,
.STATUS_MXR, .STATUS_SUM, .STATUS_MPRV, .STATUS_MPP,
.ITLBWriteF, .ITLBFlushF,
.WalkerInstrPageFaultF,
.ITLBMissF,
.PMPCFG_ARRAY_REGW, .PMPADDR_ARRAY_REGW,
.STATUS_MXR, .STATUS_SUM, .STATUS_MPRV,
.STATUS_MPP, .ITLBWriteF, .ITLBFlushF,
.WalkerInstrPageFaultF, .ITLBMissF,
// pmp/pma (inside mmu) signals. *** temporarily from AHB bus but eventually replace with internal versions pre H
.PMPCFG_ARRAY_REGW, .PMPADDR_ARRAY_REGW,
.InstrAccessFaultF
); // instruction fetch unit: PC, branch prediction, instruction cache
ieu ieu(.*); // integer execution unit: integer register file, datapath and controller
ieu ieu(
.clk, .reset,
// Decode Stage interface
.InstrD, .IllegalIEUInstrFaultD,
.IllegalBaseInstrFaultD,
// Execute Stage interface
.PCE, .PCLinkE, .FWriteIntE, .IllegalFPUInstrE,
.FWriteDataE, .PCTargetE, .MulDivE, .W64E,
.Funct3E, .ForwardedSrcAE, .ForwardedSrcBE, // *** these are the src outputs before the mux choosing between them and PCE to put in srcA/B
.SrcAE, .SrcBE, .FWriteIntM,
// Memory stage interface
.SquashSCW, // from LSU
.MemRWM, // read/write control goes to LSU
.AtomicE, // atomic control goes to LSU
.AtomicM, // atomic control goes to LSU
.MemAdrM, .MemAdrE, .WriteDataM, // Address and write data to LSU
.Funct3M, // size and signedness to LSU
.SrcAM, // to privilege and fpu
.RdM, .FIntResM, .InvalidateICacheM, .FlushDCacheM,
// Writeback stage
.CSRReadValW, .ReadDataM, .MulDivResultW,
.FWriteIntW, .RdW, .ReadDataW,
.InstrValidM,
// hazards
.StallD, .StallE, .StallM, .StallW,
.FlushD, .FlushE, .FlushM, .FlushW,
.FPUStallD, .LoadStallD, .MulDivStallD, .CSRRdStallD,
.PCSrcE,
.CSRReadM, .CSRWriteM, .PrivilegedM,
.CSRWritePendingDEM, .StoreStallD
); // integer execution unit: integer register file, datapath and controller
lsu lsu(.clk(clk),
.reset(reset),

48
wally-pipelined/testbench/testbench-linux.sv
View File

@ -419,18 +419,6 @@ module testbench();
CheckMIPFutureE = 1; \
NextMIPexpected = ExpectedCSRArrayValueE[NumCSRE]; \
end \
// $display("%tn: ExpectedCSRArrayM[7] (MEPC) = %x",$time,ExpectedCSRArrayM[7]); \
// $display("%tn: ExpectedPCM = %x",$time,ExpectedPCM); \
// // if PC does not equal MEPC, request delayed MIP is True \
// if(ExpectedPCM != ExpectedCSRArrayM[7]) begin \
// RequestDelayedMIP = 1; \
// end else begin \
// $display("%tns: Updating MIP to %x",$time,ExpectedCSRArrayValueM[NumCSRM]); \
// MIPexpected = ExpectedCSRArrayValueM[NumCSRM]; \
// force dut.hart.priv.csr.genblk1.csri.MIP_REGW = MIPexpected; \
// end \
// end \
// $display("%tns: ExpectedCSRArrayM::: %p",$time,ExpectedCSRArrayM); \
if(ExpectedCSRArrayE[NumCSRE].substr(0,3) == "mepc") begin \
$display("hello! we are here."); \
MepcExpected = ExpectedCSRArrayValueE[NumCSRE]; \
@ -468,11 +456,10 @@ module testbench();
if(CheckMIPFutureE) CheckMIPFutureE <= 0;
CheckMIPFutureM <= CheckMIPFutureE;
if(CheckMIPFutureM) begin
$display("%tns: ExpectedPCM %x",$time,ExpectedPCM);
$display("%tns: ExpectedPCE %x",$time,ExpectedPCE);
$display("%tns: ExpectedPCW %x",$time,ExpectedPCW);
// $display("%tns: ExpectedPCM %x",$time,ExpectedPCM);
// $display("%tns: ExpectedPCE %x",$time,ExpectedPCE);
// $display("%tns: ExpectedPCW %x",$time,ExpectedPCW);
if((ExpectedPCE != MepcExpected) & ((MepcExpected - ExpectedPCE) * (MepcExpected - ExpectedPCE) <= 16)) begin
// if((ExpectedPCM != MepcExpected) & ((MepcExpected - ExpectedPCM) * (MepcExpected - ExpectedPCM) <= 16)) begin
RequestDelayedMIP <= 1;
$display("%tns: Requesting Delayed MIP. Current MEPC value is %x",$time,MepcExpected);
end else begin // update MIP immediately
@ -480,29 +467,18 @@ module testbench();
MIPexpected = NextMIPexpected;
force dut.hart.priv.csr.genblk1.csri.MIP_REGW = MIPexpected;
end
$display("%tn: ExpectedCSRArrayM = %p",$time,ExpectedCSRArrayM);
$display("%tn: ExpectedCSRArrayValueM = %p",$time,ExpectedCSRArrayValueM);
$display("%tn: ExpectedTokens = %p",$time,ExpectedTokensM);
$display("%tn: MepcExpected = %x",$time,MepcExpected);
$display("%tn: ExpectedPCM = %x",$time,ExpectedPCM);
// if PC does not equal MEPC, request delayed MIP is True
$display("%tns: Difference/multiplication thing: %x",$time,(MepcExpected - ExpectedPCM) * (MepcExpected - ExpectedPCM));
$display("%tn: ExpectedCSRArrayM[NumCSRM] %x",$time,ExpectedCSRArrayM[NumCSRM]);
$display("%tn: ExpectedCSRArrayValueM[NumCSRM] %x",$time,ExpectedCSRArrayValueM[NumCSRM]);
// if((ExpectedPCM != MepcExpected) & ((MepcExpected - ExpectedPCM) * (MepcExpected - ExpectedPCM) <= 16)) begin
// RequestDelayedMIP = 1;
// $display("%tns: Requesting Delayed MIP. Current MEPC value is %x",$time,MepcExpected);
// end else begin
// $display("%tns: Updating MIP to %x",$time,NextMIPexpected);
// MIPexpected = NextMIPexpected;
// force dut.hart.priv.csr.genblk1.csri.MIP_REGW = MIPexpected;
// end
// $display("%tn: ExpectedCSRArrayM = %p",$time,ExpectedCSRArrayM);
// $display("%tn: ExpectedCSRArrayValueM = %p",$time,ExpectedCSRArrayValueM);
// $display("%tn: ExpectedTokens = %p",$time,ExpectedTokensM);
// $display("%tn: MepcExpected = %x",$time,MepcExpected);
// $display("%tn: ExpectedPCE = %x",$time,ExpectedPCE);
// $display("%tns: Difference/multiplication thing: %x",$time,(MepcExpected - ExpectedPCE) * (MepcExpected - ExpectedPCE));
// $display("%tn: ExpectedCSRArrayM[NumCSRM] %x",$time,ExpectedCSRArrayM[NumCSRM]);
// $display("%tn: ExpectedCSRArrayValueM[NumCSRM] %x",$time,ExpectedCSRArrayValueM[NumCSRM]);
end
if(RequestDelayedMIP) begin
if(RequestDelayedMIP & checkInstrM) begin
$display("%tns: Executing Delayed MIP. Current MEPC value is %x",$time,dut.hart.priv.csr.genblk1.csrm.MEPC_REGW);
$display("%tns: Updating MIP to %x",$time,NextMIPexpected);
$display("%tns: MepcExpected %x",$time,MepcExpected);
MIPexpected = NextMIPexpected;
force dut.hart.priv.csr.genblk1.csri.MIP_REGW = MIPexpected;
$display("%tns: Finished Executing Delayed MIP. Current MEPC value is %x",$time,dut.hart.priv.csr.genblk1.csrm.MEPC_REGW);