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+/*
+ * Copyright (c) 2003 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIX ME: make trackBlkAddr use blocksize from actual cache, not hard coded
+
+#include <string>
+#include <sstream>
+#include <iomanip>
+#include <vector>
+
+#include "memtest.hh"
+#include "misc.hh"
+#include "sim_events.hh"
+#include "main_memory.hh"
+#include "base_cache.hh"
+
+#include "statistics.hh"
+#include "sim_stats.hh"
+
+using namespace std;
+
+MemTest::MemTest(const string &name,
+ MemInterface *_cache_interface,
+ FunctionalMemory *main_mem,
+ FunctionalMemory *check_mem,
+ unsigned _memorySize,
+ unsigned _percentReads,
+ unsigned _percentUncacheable,
+ unsigned _maxReads,
+ unsigned _progressInterval,
+ Addr _traceAddr)
+ : BaseCPU(name, 1),
+ tickEvent(this),
+ cacheInterface(_cache_interface),
+ mainMem(main_mem),
+ checkMem(check_mem),
+ size(_memorySize),
+ percentReads(_percentReads),
+ percentUncacheable(_percentUncacheable),
+ maxReads(_maxReads),
+ progressInterval(_progressInterval),
+ nextProgressMessage(_progressInterval)
+{
+ vector<string> cmd;
+ cmd.push_back("/bin/ls");
+ vector<string> null_vec;
+ xc = new ExecContext(this ,0,mainMem,0);
+
+ blockSize = cacheInterface->getBlockSize();
+ blockAddrMask = blockSize - 1;
+ traceBlockAddr = blockAddr(_traceAddr);
+
+ //setup data storage with interesting values
+ uint8_t *data1 = new uint8_t[size];
+ uint8_t *data2 = new uint8_t[size];
+ uint8_t *data3 = new uint8_t[size];
+ memset(data1, 1, size);
+ memset(data2, 2, size);
+ memset(data3, 3, size);
+ curTick = 0;
+
+ baseAddr1 = 0x100000;
+ baseAddr2 = 0x400000;
+ uncacheAddr = 0x800000;
+
+ // set up intial memory contents here
+ mainMem->prot_write(baseAddr1, data1, size);
+ checkMem->prot_write(baseAddr1, data1, size);
+ mainMem->prot_write(baseAddr2, data2, size);
+ checkMem->prot_write(baseAddr2, data2, size);
+ mainMem->prot_write(uncacheAddr, data3, size);
+ checkMem->prot_write(uncacheAddr, data3, size);
+
+ delete [] data1;
+ delete [] data2;
+ delete [] data3;
+
+ // set up counters
+ noResponseCycles = 0;
+ numReads = 0;
+ numWrites = 0;
+ tickEvent.schedule(0);
+}
+
+static void
+printData(ostream &os, uint8_t *data, int nbytes)
+{
+ os << hex << setfill('0');
+ // assume little-endian: print bytes from highest address to lowest
+ for (uint8_t *dp = data + nbytes - 1; dp >= data; --dp) {
+ os << setw(2) << (unsigned)*dp;
+ }
+ os << dec;
+}
+
+void
+MemTest::completeRequest(MemReqPtr req, uint8_t *data)
+{
+ switch (req->cmd) {
+ case Read:
+ if (memcmp(req->data, data, req->size) != 0) {
+ cerr << name() << ": on read of 0x" << hex << req->paddr
+ << " @ cycle " << dec << curTick
+ << ", cache returns 0x";
+ printData(cerr, req->data, req->size);
+ cerr << ", expected 0x";
+ printData(cerr, data, req->size);
+ cerr << endl;
+ fatal("");
+ }
+
+ numReads++;
+
+ if (numReads.val() == nextProgressMessage) {
+ cerr << name() << ": completed " << numReads.val()
+ << " read accesses @ " << curTick << endl;
+ nextProgressMessage += progressInterval;
+ }
+
+ if (numReads.val() == maxReads) {
+ stringstream stream;
+ stream << name() << " reached max read count (" << maxReads
+ << ")" << endl;
+
+ new SimExitEvent(stream.str());
+ }
+ break;
+
+ case Write:
+ numWrites++;
+ break;
+
+
+ default:
+ panic("invalid command");
+ }
+
+ if (blockAddr(req->paddr) == traceBlockAddr) {
+ cerr << name() << ": completed "
+ << (req->cmd.isWrite() ? "write" : "read") << " access of "
+ << req->size << " bytes at address 0x"
+ << hex << req->paddr << ", value = 0x";
+ printData(cerr, req->data, req->size);
+ cerr << endl;
+ }
+
+ noResponseCycles = 0;
+ delete [] data;
+}
+
+
+void
+MemTest::regStats()
+{
+ using namespace Statistics;
+
+ numReads
+ .name(name() + ".num_reads")
+ .desc("number of read accesses completed")
+ ;
+
+ numWrites
+ .name(name() + ".num_writes")
+ .desc("number of write accesses completed")
+ ;
+
+ numCopies
+ .name(name() + ".num_copies")
+ .desc("number of copy accesses completed")
+ ;
+}
+
+void
+MemTest::tick()
+{
+ if (!tickEvent.scheduled())
+ tickEvent.schedule(curTick + 1);
+
+ if (++noResponseCycles >= 5000) {
+ cerr << name() << ": deadlocked at cycle " << curTick << endl;
+ fatal("");
+ }
+
+ if (cacheInterface->isBlocked()) {
+ return;
+ }
+
+ //make new request
+ unsigned cmd = rand() % 100;
+ unsigned offset1 = random() % size;
+ unsigned base = random() % 2;
+ uint64_t data = random();
+ unsigned access_size = random() % 4;
+ unsigned cacheable = rand() % 100;
+
+ MemReqPtr req = new MemReq();
+
+ if (cacheable < percentUncacheable) {
+ req->flags |= UNCACHEABLE;
+ req->paddr = uncacheAddr + offset1;
+ } else {
+ req->paddr = ((base) ? baseAddr1 : baseAddr2) + offset1;
+ }
+
+ req->size = 1 << access_size;
+ req->data = new uint8_t[req->size];
+ req->paddr &= ~(req->size - 1);
+ req->time = curTick;
+ req->xc = xc;
+
+ if (cmd < percentReads) {
+ // read
+ req->cmd = Read;
+ uint8_t *result = new uint8_t[8];
+ checkMem->access(Read, req->paddr, result, req->size);
+ if (blockAddr(req->paddr) == traceBlockAddr) {
+ cerr << name() << ": initiating read of "
+ << req->size << " bytes from addr 0x"
+ << hex << req->paddr << " at cycle "
+ << dec << curTick << endl;
+ }
+
+ req->completionEvent = new MemCompleteEvent(req, result, this);
+ cacheInterface->access(req);
+ } else {
+ // write
+ req->cmd = Write;
+ memcpy(req->data, &data, req->size);
+ checkMem->access(Write, req->paddr, req->data, req->size);
+ if (blockAddr(req->paddr) == traceBlockAddr) {
+ cerr << name() << ": initiating write of "
+ << req->size << " bytes (value = 0x";
+ printData(cerr, req->data, req->size);
+ cerr << ") to addr 0x"
+ << hex << req->paddr << " at cycle "
+ << dec << curTick << endl;
+ }
+ req->completionEvent = new MemCompleteEvent(req, NULL, this);
+ cacheInterface->access(req);
+ }
+}
+
+
+void
+MemCompleteEvent::process()
+{
+ tester->completeRequest(req, data);
+ delete this;
+}
+
+
+const char *
+MemCompleteEvent::description()
+{
+ return "memory access completion";
+}
+
+
+BEGIN_DECLARE_SIM_OBJECT_PARAMS(MemTest)
+
+ SimObjectParam<BaseCache *> cache;
+ SimObjectParam<FunctionalMemory *> main_mem;
+ SimObjectParam<FunctionalMemory *> check_mem;
+ Param<unsigned> memory_size;
+ Param<unsigned> percent_reads;
+ Param<unsigned> percent_uncacheable;
+ Param<unsigned> max_reads;
+ Param<unsigned> progress_interval;
+ Param<Addr> trace_addr;
+
+END_DECLARE_SIM_OBJECT_PARAMS(MemTest)
+
+
+BEGIN_INIT_SIM_OBJECT_PARAMS(MemTest)
+
+ INIT_PARAM(cache, "L1 cache"),
+ INIT_PARAM(main_mem, "hierarchical memory"),
+ INIT_PARAM(check_mem, "check memory"),
+ INIT_PARAM_DFLT(memory_size, "memory size", 65536),
+ INIT_PARAM_DFLT(percent_reads, "target read percentage", 65),
+ INIT_PARAM_DFLT(percent_uncacheable, "target uncacheable percentage", 10),
+ INIT_PARAM_DFLT(max_reads, "number of reads to simulate", 0),
+ INIT_PARAM_DFLT(progress_interval,
+ "progress report interval (in accesses)", 1000000),
+ INIT_PARAM_DFLT(trace_addr, "address to trace", 0)
+
+END_INIT_SIM_OBJECT_PARAMS(MemTest)
+
+
+CREATE_SIM_OBJECT(MemTest)
+{
+ return new MemTest(getInstanceName(), cache->getInterface(), main_mem,
+ check_mem,
+ memory_size, percent_reads,
+ percent_uncacheable, max_reads, progress_interval,
+ trace_addr);
+}
+
+REGISTER_SIM_OBJECT("MemTest", MemTest)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 18:29:26 +0000