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cvw/testbench/testbench.sv
David Harris 677bfcd511 Added check that SSTC_SUPPORTED is viable
2023-02-16 07:37:44 -08:00

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///////////////////////////////////////////
// testbench.sv
//
// Written: David_Harris@hmc.edu 9 January 2021
// Modified:
//
// Purpose: Wally Testbench and helper modules
// Applies test programs from the riscv-arch-test and Imperas suites
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
//
// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file
// except in compliance with the License, or, at your option, the Apache License version 2.0. You
// may obtain a copy of the License at
//
// https://solderpad.org/licenses/SHL-2.1/
//
// Unless required by applicable law or agreed to in writing, any work distributed under the
// License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
////////////////////////////////////////////////////////////////////////////////////////////////
`include "wally-config.vh"
`include "tests.vh"
`define PrintHPMCounters 0
`define BPRED_LOGGER 0
module testbench;
parameter DEBUG=0;
parameter TEST="none";
logic clk;
logic reset_ext, reset;
parameter SIGNATURESIZE = 5000000;
int test, i, errors, totalerrors;
logic [31:0] sig32[0:SIGNATURESIZE];
logic [`XLEN-1:0] signature[0:SIGNATURESIZE];
logic [`XLEN-1:0] testadr, testadrNoBase;
string InstrFName, InstrDName, InstrEName, InstrMName, InstrWName;
logic [31:0] InstrW;
string tests[];
logic [3:0] dummy;
logic [`AHBW-1:0] HRDATAEXT;
logic HREADYEXT, HRESPEXT;
logic [`PA_BITS-1:0] HADDR;
logic [`AHBW-1:0] HWDATA;
logic [`XLEN/8-1:0] HWSTRB;
logic HWRITE;
logic [2:0] HSIZE;
logic [2:0] HBURST;
logic [3:0] HPROT;
logic [1:0] HTRANS;
logic HMASTLOCK;
logic HCLK, HRESETn;
logic [`XLEN-1:0] PCW;
string ProgramAddrMapFile, ProgramLabelMapFile;
integer ProgramAddrLabelArray [string] = '{ "begin_signature" : 0, "tohost" : 0 };
logic DCacheFlushDone, DCacheFlushStart;
logic riscofTest;
flopenr #(`XLEN) PCWReg(clk, reset, ~dut.core.ieu.dp.StallW, dut.core.ifu.PCM, PCW);
flopenr #(32) InstrWReg(clk, reset, ~dut.core.ieu.dp.StallW, dut.core.ifu.InstrM, InstrW);
// check assertions for a legal configuration
riscvassertions riscvassertions();
// pick tests based on modes supported
initial begin
$display("TEST is %s", TEST);
//tests = '{};
if (`XLEN == 64) begin // RV64
case (TEST)
"arch64i": tests = arch64i;
"arch64priv": tests = arch64priv;
"arch64c": if (`C_SUPPORTED)
if (`ZICSR_SUPPORTED) tests = {arch64c, arch64cpriv};
else tests = {arch64c};
"arch64m": if (`M_SUPPORTED) tests = arch64m;
"arch64f": if (`F_SUPPORTED) tests = arch64f;
"arch64d": if (`D_SUPPORTED) tests = arch64d;
"arch64zi": if (`ZIFENCEI_SUPPORTED) tests = arch64zi;
"imperas64i": tests = imperas64i;
"imperas64f": if (`F_SUPPORTED) tests = imperas64f;
"imperas64d": if (`D_SUPPORTED) tests = imperas64d;
"imperas64m": if (`M_SUPPORTED) tests = imperas64m;
"wally64a": if (`A_SUPPORTED) tests = wally64a;
"imperas64c": if (`C_SUPPORTED) tests = imperas64c;
else tests = imperas64iNOc;
"custom": tests = custom;
"wally64i": tests = wally64i;
"wally64priv": tests = wally64priv;
"wally64periph": tests = wally64periph;
"coremark": tests = coremark;
"fpga": tests = fpga;
"ahb" : tests = ahb;
endcase
end else begin // RV32
case (TEST)
"arch32i": tests = arch32i;
"arch32priv": tests = arch32priv;
"arch32c": if (`C_SUPPORTED)
if (`ZICSR_SUPPORTED) tests = {arch32c, arch32cpriv};
else tests = {arch32c};
"arch32m": if (`M_SUPPORTED) tests = arch32m;
"arch32f": if (`F_SUPPORTED) tests = arch32f;
"arch32d": if (`D_SUPPORTED) tests = arch32d;
"arch32zi": if (`ZIFENCEI_SUPPORTED) tests = arch32zi;
"imperas32i": tests = imperas32i;
"imperas32f": if (`F_SUPPORTED) tests = imperas32f;
"imperas32m": if (`M_SUPPORTED) tests = imperas32m;
"wally32a": if (`A_SUPPORTED) tests = wally32a;
"imperas32c": if (`C_SUPPORTED) tests = imperas32c;
else tests = imperas32iNOc;
"wally32i": tests = wally32i;
"wally32e": tests = wally32e;
"wally32priv": tests = wally32priv;
"wally32periph": tests = wally32periph;
"embench": tests = embench;
"coremark": tests = coremark;
"arch32ba": if (`ZBA_SUPPORTED) tests = arch32ba;
endcase
end
if (tests.size() == 0) begin
$display("TEST %s not supported in this configuration", TEST);
$stop;
end
end
string signame, memfilename, pathname, objdumpfilename, adrstr, outputfile;
integer outputFilePointer;
logic [31:0] GPIOPinsIn, GPIOPinsOut, GPIOPinsEn;
logic UARTSin, UARTSout;
logic SDCCLK;
logic SDCCmdIn;
logic SDCCmdOut;
logic SDCCmdOE;
logic [3:0] SDCDatIn;
tri1 [3:0] SDCDat;
tri1 SDCCmd;
logic HREADY;
logic HSELEXT;
logic InitializingMemories;
integer ResetCount, ResetThreshold;
logic InReset;
// instantiate device to be tested
assign GPIOPinsIn = 0;
assign UARTSin = 1;
if(`EXT_MEM_SUPPORTED) begin
ram_ahb #(.BASE(`EXT_MEM_BASE), .RANGE(`EXT_MEM_RANGE))
ram (.HCLK, .HRESETn, .HADDR, .HWRITE, .HTRANS, .HWDATA, .HSELRam(HSELEXT),
.HREADRam(HRDATAEXT), .HREADYRam(HREADYEXT), .HRESPRam(HRESPEXT), .HREADY,
.HWSTRB);
end else begin
assign HREADYEXT = 1;
assign HRESPEXT = 0;
assign HRDATAEXT = 0;
end
if(`FPGA) begin : sdcard
sdModel sdcard
(.sdClk(SDCCLK),
.cmd(SDCCmd),
.dat(SDCDat));
assign SDCCmd = SDCCmdOE ? SDCCmdOut : 1'bz;
assign SDCCmdIn = SDCCmd;
assign SDCDatIn = SDCDat;
end else begin
assign SDCCmd = '0;
assign SDCDat = '0;
end
wallypipelinedsoc dut(.clk, .reset_ext, .reset, .HRDATAEXT,.HREADYEXT, .HRESPEXT,.HSELEXT,
.HCLK, .HRESETn, .HADDR, .HWDATA, .HWSTRB, .HWRITE, .HSIZE, .HBURST, .HPROT,
.HTRANS, .HMASTLOCK, .HREADY, .TIMECLK(1'b0), .GPIOPinsIn, .GPIOPinsOut, .GPIOPinsEn,
.UARTSin, .UARTSout, .SDCCmdIn, .SDCCmdOut, .SDCCmdOE, .SDCDatIn, .SDCCLK);
// Track names of instructions
instrTrackerTB it(clk, reset, dut.core.ieu.dp.FlushE,
dut.core.ifu.InstrRawF[31:0],
dut.core.ifu.InstrD, dut.core.ifu.InstrE,
dut.core.ifu.InstrM, InstrW,
InstrFName, InstrDName, InstrEName, InstrMName, InstrWName);
// initialize tests
localparam MemStartAddr = 0;
localparam MemEndAddr = `UNCORE_RAM_RANGE>>1+(`XLEN/32);
initial
begin
ResetCount = 0;
ResetThreshold = 2;
InReset = 1;
test = 1;
totalerrors = 0;
testadr = 0;
testadrNoBase = 0;
// riscof tests have a different signature, tests[0] == "1" refers to RiscvArchTests and tests[0] == "2" refers to WallyRiscvArchTests
riscofTest = tests[0] == "1" | tests[0] == "2";
// fill memory with defined values to reduce Xs in simulation
// Quick note the memory will need to be initialized. The C library does not
// guarantee the initialized reads. For example a strcmp can read 6 byte
// strings, but uses a load double to read them in. If the last 2 bytes are
// not initialized the compare results in an 'x' which propagates through
// the design.
if (TEST == "coremark")
for (i=MemStartAddr; i<MemEndAddr; i = i+1)
dut.uncore.uncore.ram.ram.memory.RAM[i] = 64'h0;
// read test vectors into memory
pathname = tvpaths[tests[0].atoi()];
/* if (tests[0] == `IMPERASTEST)
pathname = tvpaths[0];
else pathname = tvpaths[1]; */
if (riscofTest) memfilename = {pathname, tests[test], "/ref/ref.elf.memfile"};
else memfilename = {pathname, tests[test], ".elf.memfile"};
if (`FPGA) begin
string romfilename, sdcfilename;
romfilename = {"../tests/custom/fpga-test-sdc/bin/fpga-test-sdc.memfile"};
sdcfilename = {"../testbench/sdc/ramdisk2.hex"};
$readmemh(romfilename, dut.uncore.uncore.bootrom.bootrom.memory.ROM);
$readmemh(sdcfilename, sdcard.sdcard.FLASHmem);
// force sdc timers
force dut.uncore.uncore.sdc.SDC.LimitTimers = 1;
end else begin
if (`IROM_SUPPORTED) $readmemh(memfilename, dut.core.ifu.irom.irom.rom.ROM);
else if (`BUS_SUPPORTED) $readmemh(memfilename, dut.uncore.uncore.ram.ram.memory.RAM);
if (`DTIM_SUPPORTED) $readmemh(memfilename, dut.core.lsu.dtim.dtim.ram.RAM);
end
if (riscofTest) begin
ProgramAddrMapFile = {pathname, tests[test], "/ref/ref.elf.objdump.addr"};
ProgramLabelMapFile = {pathname, tests[test], "/ref/ref.elf.objdump.lab"};
end else begin
ProgramAddrMapFile = {pathname, tests[test], ".elf.objdump.addr"};
ProgramLabelMapFile = {pathname, tests[test], ".elf.objdump.lab"};
end
// declare memory labels that interest us, the updateProgramAddrLabelArray task will find the addr of each label and fill the array
// to expand, add more elements to this array and initialize them to zero (also initilaize them to zero at the start of the next test)
if(!`FPGA) begin
updateProgramAddrLabelArray(ProgramAddrMapFile, ProgramLabelMapFile, ProgramAddrLabelArray);
$display("Read memfile %s", memfilename);
end
end
// generate clock to sequence tests
always
begin
clk = 1; # 5; clk = 0; # 5;
// if ($time % 100000 == 0) $display("Time is %0t", $time);
end
logic [`XLEN-1:0] debugmemoryadr;
// assign debugmemoryadr = dut.uncore.uncore.ram.ram.memory.RAM[5140];
// check results
assign reset_ext = InReset;
always @(negedge clk)
begin
InitializingMemories = 0;
if(InReset == 1) begin
// once the test inidicates it's done we need to immediately hold reset for a number of cycles.
if(ResetCount < ResetThreshold) ResetCount = ResetCount + 1;
else begin // hit reset threshold so we remove reset.
InReset = 0;
ResetCount = 0;
end
end else begin
if (TEST == "coremark")
if (dut.core.priv.priv.EcallFaultM) begin
$display("Benchmark: coremark is done.");
$stop;
end
// Termination condition (i.e. we finished running current test)
if (DCacheFlushDone) begin
integer begin_signature_addr;
InReset = 1;
begin_signature_addr = ProgramAddrLabelArray["begin_signature"];
if (!begin_signature_addr)
$display("begin_signature addr not found in %s", ProgramLabelMapFile);
testadr = ($unsigned(begin_signature_addr))/(`XLEN/8);
testadrNoBase = (begin_signature_addr - `UNCORE_RAM_BASE)/(`XLEN/8);
#600; // give time for instructions in pipeline to finish
if (TEST == "embench") begin
// Writes contents of begin_signature to .sim.output file
// this contains instret and cycles for start and end of test run, used by embench python speed script to calculate embench speed score
// also begin_signature contains the results of the self checking mechanism, which will be read by the python script for error checking
$display("Embench Benchmark: %s is done.", tests[test]);
if (riscofTest) outputfile = {pathname, tests[test], "/ref/ref.sim.output"};
else outputfile = {pathname, tests[test], ".sim.output"};
outputFilePointer = $fopen(outputfile);
i = 0;
while ($unsigned(i) < $unsigned(5'd5)) begin
$fdisplayh(outputFilePointer, DCacheFlushFSM.ShadowRAM[testadr+i]);
i = i + 1;
end
$fclose(outputFilePointer);
$display("Embench Benchmark: created output file: %s", outputfile);
end else begin
// for tests with no self checking mechanism, read .signature.output file and compare to check for errors
// clear signature to prevent contamination from previous tests
for(i=0; i<SIGNATURESIZE; i=i+1) begin
sig32[i] = 'bx;
end
if (riscofTest) signame = {pathname, tests[test], "/ref/Reference-sail_c_simulator.signature"};
else signame = {pathname, tests[test], ".signature.output"};
// read signature, reformat in 64 bits if necessary
$readmemh(signame, sig32);
i = 0;
while (i < SIGNATURESIZE) begin
if (`XLEN == 32) begin
signature[i] = sig32[i];
i = i+1;
end else begin
signature[i/2] = {sig32[i+1], sig32[i]};
i = i + 2;
end
if (i >= 4 & sig32[i-4] === 'bx) begin
if (i == 4) begin
i = SIGNATURESIZE+1; // flag empty file
$display(" Error: empty test file");
end else i = SIGNATURESIZE; // skip over the rest of the x's for efficiency
end
end
// Check errors
errors = (i == SIGNATURESIZE+1); // error if file is empty
i = 0;
/* verilator lint_off INFINITELOOP */
while (signature[i] !== 'bx) begin
logic [`XLEN-1:0] sig;
if (`DTIM_SUPPORTED) sig = dut.core.lsu.dtim.dtim.ram.RAM[testadrNoBase+i];
else if (`UNCORE_RAM_SUPPORTED) sig = dut.uncore.uncore.ram.ram.memory.RAM[testadrNoBase+i];
//$display("signature[%h] = %h sig = %h", i, signature[i], sig);
if (signature[i] !== sig & (signature[i] !== DCacheFlushFSM.ShadowRAM[testadr+i])) begin
errors = errors+1;
$display(" Error on test %s result %d: adr = %h sim (D$) %h sim (DTIM_SUPPORTED) = %h, signature = %h",
tests[test], i, (testadr+i)*(`XLEN/8), DCacheFlushFSM.ShadowRAM[testadr+i], sig, signature[i]);
$stop;//***debug
end
i = i + 1;
end
/* verilator lint_on INFINITELOOP */
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;
end
end
// move onto the next test, check to see if we're done
test = test + 1;
if (test == tests.size()) begin
if (totalerrors == 0) $display("SUCCESS! All tests ran without failures.");
else $display("FAIL: %d test programs had errors", totalerrors);
$stop;
end
else begin
InitializingMemories = 1;
// If there are still additional tests to run, read in information for the next test
//pathname = tvpaths[tests[0]];
if (riscofTest) memfilename = {pathname, tests[test], "/ref/ref.elf.memfile"};
else memfilename = {pathname, tests[test], ".elf.memfile"};
//$readmemh(memfilename, dut.uncore.uncore.ram.ram.memory.RAM);
if (`IROM_SUPPORTED) $readmemh(memfilename, dut.core.ifu.irom.irom.rom.ROM);
else if (`UNCORE_RAM_SUPPORTED) $readmemh(memfilename, dut.uncore.uncore.ram.ram.memory.RAM);
if (`DTIM_SUPPORTED) $readmemh(memfilename, dut.core.lsu.dtim.dtim.ram.RAM);
if (riscofTest) begin
ProgramAddrMapFile = {pathname, tests[test], "/ref/ref.elf.objdump.addr"};
ProgramLabelMapFile = {pathname, tests[test], "/ref/ref.elf.objdump.lab"};
end else begin
ProgramAddrMapFile = {pathname, tests[test], ".elf.objdump.addr"};
ProgramLabelMapFile = {pathname, tests[test], ".elf.objdump.lab"};
end
ProgramAddrLabelArray = '{ "begin_signature" : 0, "tohost" : 0 };
if(!`FPGA) begin
updateProgramAddrLabelArray(ProgramAddrMapFile, ProgramLabelMapFile, ProgramAddrLabelArray);
$display("Read memfile %s", memfilename);
end
end
end // if (DCacheFlushDone)
end
end // always @ (negedge clk)
if(`PrintHPMCounters & `ZICOUNTERS_SUPPORTED) begin
integer HPMCindex;
string HPMCnames[] = '{"Mcycle",
"------",
"InstRet",
"Load Stall",
"Br Dir Wrong",
"Br Count",
"Br Target Wrong",
"Jump, JR, Jal",
"RAS Wrong",
"ret",
"Instr Class Wrong",
"D Cache Access",
"D Cache Miss",
"I Cache Access",
"I Cache Miss",
"Br Pred Wrong"};
always @(negedge clk) begin
if(DCacheFlushStart & ~DCacheFlushDone) begin
for(HPMCindex = 0; HPMCindex < HPMCnames.size(); HPMCindex += 1) begin
// unlikely to have more than 10M in any counter.
$display("Cnt[%2d] = %7d %s", HPMCindex, dut.core.priv.priv.csr.counters.counters.HPMCOUNTER_REGW[HPMCindex], HPMCnames[HPMCindex]);
end
end
end
end
// track the current function or global label
if (DEBUG == 1) begin : FunctionName
FunctionName FunctionName(.reset(reset),
.clk(clk),
.ProgramAddrMapFile(ProgramAddrMapFile),
.ProgramLabelMapFile(ProgramLabelMapFile));
end
// Termination condition
// terminate on a specific ECALL after li x3,1 for old Imperas tests, *** remove this when old imperas tests are removed
// or sw gp,-56(t0) for new Imperas tests
// or sd gp, -56(t0)
// or on a jump to self infinite loop (6f) for RISC-V Arch tests
logic ecf; // remove this once we don't rely on old Imperas tests with Ecalls
if (`ZICSR_SUPPORTED) assign ecf = dut.core.priv.priv.EcallFaultM;
else assign ecf = 0;
assign DCacheFlushStart = ecf &
(dut.core.ieu.dp.regf.rf[3] == 1 |
(dut.core.ieu.dp.regf.we3 &
dut.core.ieu.dp.regf.a3 == 3 &
dut.core.ieu.dp.regf.wd3 == 1)) |
((dut.core.ifu.InstrM == 32'h6f | dut.core.ifu.InstrM == 32'hfc32a423 | dut.core.ifu.InstrM == 32'hfc32a823) & dut.core.ieu.c.InstrValidM ) |
((dut.core.lsu.IEUAdrM == ProgramAddrLabelArray["tohost"]) & InstrMName == "SW" );
DCacheFlushFSM DCacheFlushFSM(.clk(clk),
.reset(reset),
.start(DCacheFlushStart),
.done(DCacheFlushDone));
// initialize the branch predictor
if (`BPRED_SUPPORTED == 1)
begin
genvar adrindex;
// Initializing all zeroes into the branch predictor memory.
for(adrindex = 0; adrindex < 2**10; adrindex++) begin
initial begin
force dut.core.ifu.bpred.bpred.TargetPredictor.memory.mem[adrindex] = 0;
#1;
release dut.core.ifu.bpred.bpred.TargetPredictor.memory.mem[adrindex];
end
end
for(adrindex = 0; adrindex < 2**`BPRED_SIZE; adrindex++) begin
initial begin
force dut.core.ifu.bpred.bpred.Predictor.DirPredictor.PHT.mem[adrindex] = 0;
#1;
release dut.core.ifu.bpred.bpred.Predictor.DirPredictor.PHT.mem[adrindex];
end
end
if (`BPRED_LOGGER) begin
string direction;
int file;
logic PCSrcM;
flopenrc #(1) PCSrcMReg(clk, reset, dut.core.FlushM, ~dut.core.StallM, dut.core.ifu.bpred.bpred.Predictor.DirPredictor.PCSrcE, PCSrcM);
initial
file = $fopen("branch.log", "w");
always @(posedge clk) begin
if(dut.core.ifu.InstrClassM[0] & ~dut.core.StallW & ~dut.core.FlushW & dut.core.InstrValidM) begin
direction = PCSrcM ? "t" : "n";
$fwrite(file, "%h %s\n", dut.core.PCM, direction);
end
end
end
end
// check for hange up.
logic [`XLEN-1:0] OldPCW;
integer WatchDogTimerCount;
localparam WatchDogTimerThreshold = 1000000;
logic WatchDogTimeOut;
always_ff @(posedge clk) begin
OldPCW <= PCW;
if(OldPCW == PCW) WatchDogTimerCount = WatchDogTimerCount + 1'b1;
else WatchDogTimerCount = '0;
end
always_comb begin
WatchDogTimeOut = WatchDogTimerCount >= WatchDogTimerThreshold;
if(WatchDogTimeOut) begin
$display("FAILURE: Watch Dog Time Out triggered. PCW stuck at %x for more than %d cycles", PCW, WatchDogTimerCount);
$stop;
end
end
endmodule
module riscvassertions;
initial begin
assert (`PMP_ENTRIES == 0 | `PMP_ENTRIES==16 | `PMP_ENTRIES==64) else $error("Illegal number of PMP entries: PMP_ENTRIES must be 0, 16, or 64");
assert (`S_SUPPORTED | `VIRTMEM_SUPPORTED == 0) else $error("Virtual memory requires S mode support");
assert (`IDIV_BITSPERCYCLE == 1 | `IDIV_BITSPERCYCLE==2 | `IDIV_BITSPERCYCLE==4) else $error("Illegal number of divider bits/cycle: IDIV_BITSPERCYCLE must be 1, 2, or 4");
assert (`F_SUPPORTED | ~`D_SUPPORTED) else $error("Can't support double fp (D) without supporting float (F)");
assert (`D_SUPPORTED | ~`Q_SUPPORTED) else $error("Can't support quad fp (Q) without supporting double (D)");
assert (`F_SUPPORTED | ~`ZFH_SUPPORTED) else $error("Can't support half-precision fp (ZFH) without supporting float (F)");
assert (`DCACHE_SUPPORTED | ~`F_SUPPORTED | `FLEN <= `XLEN) else $error("Data cache required to support FLEN > XLEN because AHB bus width is XLEN");
assert (`I_SUPPORTED ^ `E_SUPPORTED) else $error("Exactly one of I and E must be supported");
assert (`FLEN<=`XLEN | `DCACHE_SUPPORTED | `DTIM_SUPPORTED) else $error("Wally does not support FLEN > XLEN unleses data cache or DTIM is supported");
assert (`DCACHE_WAYSIZEINBYTES <= 4096 | (!`DCACHE_SUPPORTED) | `VIRTMEM_SUPPORTED == 0) else $error("DCACHE_WAYSIZEINBYTES cannot exceed 4 KiB when caches and vitual memory is enabled (to prevent aliasing)");
assert (`DCACHE_LINELENINBITS >= 128 | (!`DCACHE_SUPPORTED)) else $error("DCACHE_LINELENINBITS must be at least 128 when caches are enabled");
assert (`DCACHE_LINELENINBITS < `DCACHE_WAYSIZEINBYTES*8) else $error("DCACHE_LINELENINBITS must be smaller than way size");
assert (`ICACHE_WAYSIZEINBYTES <= 4096 | (!`ICACHE_SUPPORTED) | `VIRTMEM_SUPPORTED == 0) else $error("ICACHE_WAYSIZEINBYTES cannot exceed 4 KiB when caches and vitual memory is enabled (to prevent aliasing)");
assert (`ICACHE_LINELENINBITS >= 32 | (!`ICACHE_SUPPORTED)) else $error("ICACHE_LINELENINBITS must be at least 32 when caches are enabled");
assert (`ICACHE_LINELENINBITS < `ICACHE_WAYSIZEINBYTES*8) else $error("ICACHE_LINELENINBITS must be smaller than way size");
assert (2**$clog2(`DCACHE_LINELENINBITS) == `DCACHE_LINELENINBITS | (!`DCACHE_SUPPORTED)) else $error("DCACHE_LINELENINBITS must be a power of 2");
assert (2**$clog2(`DCACHE_WAYSIZEINBYTES) == `DCACHE_WAYSIZEINBYTES | (!`DCACHE_SUPPORTED)) else $error("DCACHE_WAYSIZEINBYTES must be a power of 2");
assert (2**$clog2(`ICACHE_LINELENINBITS) == `ICACHE_LINELENINBITS | (!`ICACHE_SUPPORTED)) else $error("ICACHE_LINELENINBITS must be a power of 2");
assert (2**$clog2(`ICACHE_WAYSIZEINBYTES) == `ICACHE_WAYSIZEINBYTES | (!`ICACHE_SUPPORTED)) else $error("ICACHE_WAYSIZEINBYTES must be a power of 2");
assert (2**$clog2(`ITLB_ENTRIES) == `ITLB_ENTRIES | `VIRTMEM_SUPPORTED==0) else $error("ITLB_ENTRIES must be a power of 2");
assert (2**$clog2(`DTLB_ENTRIES) == `DTLB_ENTRIES | `VIRTMEM_SUPPORTED==0) else $error("DTLB_ENTRIES must be a power of 2");
assert (`UNCORE_RAM_RANGE >= 56'h07FFFFFF) else $warning("Some regression tests will fail if UNCORE_RAM_RANGE is less than 56'h07FFFFFF");
assert (`ZICSR_SUPPORTED == 1 | (`PMP_ENTRIES == 0 & `VIRTMEM_SUPPORTED == 0)) else $error("PMP_ENTRIES and VIRTMEM_SUPPORTED must be zero if ZICSR not supported.");
assert (`ZICSR_SUPPORTED == 1 | (`S_SUPPORTED == 0 & `U_SUPPORTED == 0)) else $error("S and U modes not supported if ZICSR not supported");
assert (`U_SUPPORTED | (`S_SUPPORTED == 0)) else $error ("S mode only supported if U also is supported");
assert (`VIRTMEM_SUPPORTED == 0 | (`DTIM_SUPPORTED == 0 & `IROM_SUPPORTED == 0)) else $error("Can't simultaneously have virtual memory and DTIM_SUPPORTED/IROM_SUPPORTED because local memories don't translate addresses");
assert (`DCACHE_SUPPORTED | `VIRTMEM_SUPPORTED ==0) else $error("Virtual memory needs dcache");
assert (`ICACHE_SUPPORTED | `VIRTMEM_SUPPORTED ==0) else $error("Virtual memory needs icache");
assert ((`DCACHE_SUPPORTED == 0 & `ICACHE_SUPPORTED == 0) | `BUS_SUPPORTED) else $error("Dcache and Icache requires DBUS_SUPPORTED.");
assert (`DCACHE_LINELENINBITS <= `XLEN*16 | (!`DCACHE_SUPPORTED)) else $error("DCACHE_LINELENINBITS must not exceed 16 words because max AHB burst size is 1");
assert (`DCACHE_LINELENINBITS % 4 == 0) else $error("DCACHE_LINELENINBITS must hold 4, 8, or 16 words");
assert (`DCACHE_SUPPORTED | `A_SUPPORTED == 0) else $error("Atomic extension (A) requires cache on Wally.");
assert (`IDIV_ON_FPU == 0 | `F_SUPPORTED) else $error("IDIV on FPU needs F_SUPPORTED");
assert (`SSTC_SUPPORTED == 0 | (`S_SUPPORTED)) else $error("SSTC requires S_SUPPORTED");
end
endmodule
/* verilator lint_on STMTDLY */
/* verilator lint_on WIDTH */
module DCacheFlushFSM
(input logic clk,
input logic reset,
input logic start,
output logic done);
genvar adr;
logic [`XLEN-1:0] ShadowRAM[`UNCORE_RAM_BASE>>(1+`XLEN/32):(`UNCORE_RAM_RANGE+`UNCORE_RAM_BASE)>>1+(`XLEN/32)];
if(`DCACHE_SUPPORTED) begin
localparam numlines = testbench.dut.core.lsu.bus.dcache.dcache.NUMLINES;
localparam numways = testbench.dut.core.lsu.bus.dcache.dcache.NUMWAYS;
localparam linebytelen = testbench.dut.core.lsu.bus.dcache.dcache.LINEBYTELEN;
localparam linelen = testbench.dut.core.lsu.bus.dcache.dcache.LINELEN;
localparam sramlen = testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[0].SRAMLEN;
localparam cachesramwords = testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[0].NUMSRAM;
localparam numwords = sramlen/`XLEN;
localparam lognumlines = $clog2(numlines);
localparam loglinebytelen = $clog2(linebytelen);
localparam lognumways = $clog2(numways);
localparam tagstart = lognumlines + loglinebytelen;
genvar index, way, cacheWord;
logic [sramlen-1:0] CacheData [numways-1:0] [numlines-1:0] [cachesramwords-1:0];
logic [sramlen-1:0] cacheline;
logic [`XLEN-1:0] CacheTag [numways-1:0] [numlines-1:0] [cachesramwords-1:0];
logic CacheValid [numways-1:0] [numlines-1:0] [cachesramwords-1:0];
logic CacheDirty [numways-1:0] [numlines-1:0] [cachesramwords-1:0];
logic [`PA_BITS-1:0] CacheAdr [numways-1:0] [numlines-1:0] [cachesramwords-1:0];
for(index = 0; index < numlines; index++) begin
for(way = 0; way < numways; way++) begin
for(cacheWord = 0; cacheWord < cachesramwords; cacheWord++) begin
copyShadow #(.tagstart(tagstart),
.loglinebytelen(loglinebytelen), .sramlen(sramlen))
copyShadow(.clk,
.start,
.tag(testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[way].CacheTagMem.RAM[index][`PA_BITS-1-tagstart:0]),
.valid(testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[way].ValidBits[index]),
.dirty(testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[way].DirtyBits[index]),
// these dirty bit selections would be needed if dirty is moved inside the tag array.
//.dirty(testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[way].dirty.DirtyMem.RAM[index]),
//.dirty(testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[way].CacheTagMem.RAM[index][`PA_BITS+tagstart]),
.data(testbench.dut.core.lsu.bus.dcache.dcache.CacheWays[way].word[cacheWord].CacheDataMem.RAM[index]),
.index(index),
.cacheWord(cacheWord),
.CacheData(CacheData[way][index][cacheWord]),
.CacheAdr(CacheAdr[way][index][cacheWord]),
.CacheTag(CacheTag[way][index][cacheWord]),
.CacheValid(CacheValid[way][index][cacheWord]),
.CacheDirty(CacheDirty[way][index][cacheWord]));
end
end
end
integer i, j, k, l;
always @(posedge clk) begin
if (start) begin #1
#1
for(i = 0; i < numlines; i++) begin
for(j = 0; j < numways; j++) begin
for(l = 0; l < cachesramwords; l++) begin
if (CacheValid[j][i][l] & CacheDirty[j][i][l]) begin
for(k = 0; k < numwords; k++) begin
//cacheline = CacheData[j][i][0];
// does not work with modelsim
// # ** Error: ../testbench/testbench.sv(483): Range must be bounded by constant expressions.
// see https://verificationacademy.com/forums/systemverilog/range-must-be-bounded-constant-expressions
//ShadowRAM[CacheAdr[j][i][k] >> $clog2(`XLEN/8)] = cacheline[`XLEN*(k+1)-1:`XLEN*k];
ShadowRAM[(CacheAdr[j][i][l] >> $clog2(`XLEN/8)) + k] = CacheData[j][i][l][`XLEN*k +: `XLEN];
end
end
end
end
end
end
end
end
flop #(1) doneReg(.clk, .d(start), .q(done));
endmodule
module copyShadow
#(parameter tagstart, loglinebytelen, sramlen)
(input logic clk,
input logic start,
input logic [`PA_BITS-1:tagstart] tag,
input logic valid, dirty,
input logic [sramlen-1:0] data,
input logic [32-1:0] index,
input logic [32-1:0] cacheWord,
output logic [sramlen-1:0] CacheData,
output logic [`PA_BITS-1:0] CacheAdr,
output logic [`XLEN-1:0] CacheTag,
output logic CacheValid,
output logic CacheDirty);
always_ff @(posedge clk) begin
if(start) begin
CacheTag = tag;
CacheValid = valid;
CacheDirty = dirty;
CacheData = data;
CacheAdr = (tag << tagstart) + (index << loglinebytelen) + (cacheWord << $clog2(sramlen/8));
end
end
endmodule
task automatic updateProgramAddrLabelArray;
input string ProgramAddrMapFile, ProgramLabelMapFile;
inout integer ProgramAddrLabelArray [string];
// Gets the memory location of begin_signature
integer ProgramLabelMapFP, ProgramAddrMapFP;
ProgramLabelMapFP = $fopen(ProgramLabelMapFile, "r");
ProgramAddrMapFP = $fopen(ProgramAddrMapFile, "r");
if (ProgramLabelMapFP & ProgramAddrMapFP) begin // check we found both files
while (!$feof(ProgramLabelMapFP)) begin
string label, adrstr;
integer returncode;
returncode = $fscanf(ProgramLabelMapFP, "%s\n", label);
returncode = $fscanf(ProgramAddrMapFP, "%s\n", adrstr);
if (ProgramAddrLabelArray.exists(label))
ProgramAddrLabelArray[label] = adrstr.atohex();
end
end
$fclose(ProgramLabelMapFP);
$fclose(ProgramAddrMapFP);
endtask
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