Updates to bring MemTest closer to working with newmem. Ron still needs to do the initial setup and configuration for it to work properly.

src/SConscript:
    Include MemTest for now.  It's not complete but it compiles so it shouldn't mess anything else up.

--HG--
extra : convert_revision : 15a610c855b677fdced817850c92e4c911cf6d1c

2 files changed, 262 insertions, 136 deletions

diff --git a/src/cpu/memtest/memtest.cc b/src/cpu/memtest/memtest.cc
index 7ea9eaefc..e3a47f10a 100644
--- a/src/cpu/memtest/memtest.cc
+++ b/src/cpu/memtest/memtest.cc
@@ -40,7 +40,8 @@
 #include "base/statistics.hh"
 #include "cpu/simple_thread.hh"
 #include "cpu/memtest/memtest.hh"
-#include "mem/cache/base_cache.hh"
+//#include "mem/cache/base_cache.hh"
+#include "mem/physical.hh"
 #include "sim/builder.hh"
 #include "sim/sim_events.hh"
 #include "sim/stats.hh"
@@ -50,27 +51,64 @@ using namespace TheISA;
 
 int TESTER_ALLOCATOR=0;
 
+bool
+MemTest::CpuPort::recvTiming(Packet *pkt)
+{
+    memtest->completeRequest(pkt);
+    return true;
+}
+
+Tick
+MemTest::CpuPort::recvAtomic(Packet *pkt)
+{
+    panic("MemTest doesn't expect recvAtomic callback!");
+    return curTick;
+}
+
+void
+MemTest::CpuPort::recvFunctional(Packet *pkt)
+{
+    memtest->completeRequest(pkt);
+}
+
+void
+MemTest::CpuPort::recvStatusChange(Status status)
+{
+    if (status == RangeChange)
+        return;
+
+    panic("MemTest doesn't expect recvStatusChange callback!");
+}
+
+void
+MemTest::CpuPort::recvRetry()
+{
+    memtest->doRetry();
+}
+
+
 MemTest::MemTest(const string &name,
-                 MemInterface *_cache_interface,
-                 FunctionalMemory *main_mem,
-                 FunctionalMemory *check_mem,
+//		 MemInterface *_cache_interface,
+                 PhysicalMemory *main_mem,
+                 PhysicalMemory *check_mem,
                  unsigned _memorySize,
                  unsigned _percentReads,
-                 unsigned _percentCopies,
+//		 unsigned _percentCopies,
                  unsigned _percentUncacheable,
                  unsigned _progressInterval,
                  unsigned _percentSourceUnaligned,
                  unsigned _percentDestUnaligned,
                  Addr _traceAddr,
                  Counter _max_loads)
-    : SimObject(name),
+    : MemObject(name),
       tickEvent(this),
-      cacheInterface(_cache_interface),
+      cachePort("dcache", this),
+      retryPkt(NULL),
       mainMem(main_mem),
       checkMem(check_mem),
       size(_memorySize),
       percentReads(_percentReads),
-      percentCopies(_percentCopies),
+//      percentCopies(_percentCopies),
       percentUncacheable(_percentUncacheable),
       progressInterval(_progressInterval),
       nextProgressMessage(_progressInterval),
@@ -81,11 +119,43 @@ MemTest::MemTest(const string &name,
     vector<string> cmd;
     cmd.push_back("/bin/ls");
     vector<string> null_vec;
-    thread = new SimpleThread(NULL, 0, mainMem, 0);
+    thread = new SimpleThread(NULL, 0, NULL, 0, mainMem);
+    curTick = 0;
+
+    // Needs to be masked off once we know the block size.
+    traceBlockAddr = _traceAddr;
+    baseAddr1 = 0x100000;
+    baseAddr2 = 0x400000;
+    uncacheAddr = 0x800000;
 
-    blockSize = cacheInterface->getBlockSize();
+    // set up counters
+    noResponseCycles = 0;
+    numReads = 0;
+    tickEvent.schedule(0);
+
+    id = TESTER_ALLOCATOR++;
+}
+
+Port *
+MemTest::getPort(const std::string &if_name, int idx)
+{
+    // ***** NOTE TO RON: I'm not sure what it should do if these get ports
+    // are called on it.
+    if (if_name == "dcache_port")
+        return &cachePort;
+    else if (if_name == "icache_port")
+        return &cachePort;
+    else
+        panic("No Such Port\n");
+}
+
+void
+MemTest::init()
+{
+    // By the time init() is called, the ports should be hooked up.
+    blockSize = cachePort.peerBlockSize();
     blockAddrMask = blockSize - 1;
-    traceBlockAddr = blockAddr(_traceAddr);
+    traceBlockAddr = blockAddr(traceBlockAddr);
 
     //setup data storage with interesting values
     uint8_t *data1 = new uint8_t[size];
@@ -94,30 +164,22 @@ MemTest::MemTest(const string &name,
     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
+    // ***** NOTE FOR RON: I'm not sure how to setup initial memory
+    // contents. - Kevin
+/*
     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;
-    tickEvent.schedule(0);
-
-    id = TESTER_ALLOCATOR++;
 }
 
 static void
@@ -132,23 +194,31 @@ printData(ostream &os, uint8_t *data, int nbytes)
 }
 
 void
-MemTest::completeRequest(MemReqPtr &req, uint8_t *data)
+MemTest::completeRequest(Packet *pkt)
 {
+    MemTestSenderState *state =
+        dynamic_cast<MemTestSenderState *>(pkt->senderState);
+
+    uint8_t *data = state->data;
+    uint8_t *pkt_data = pkt->getPtr<uint8_t>();
+    Request *req = pkt->req;
+
     //Remove the address from the list of outstanding
-    std::set<unsigned>::iterator removeAddr = outstandingAddrs.find(req->paddr);
+    std::set<unsigned>::iterator removeAddr = outstandingAddrs.find(req->getPaddr());
     assert(removeAddr != outstandingAddrs.end());
     outstandingAddrs.erase(removeAddr);
 
-    switch (req->cmd) {
-      case Read:
-        if (memcmp(req->data, data, req->size) != 0) {
-            cerr << name() << ": on read of 0x" << hex << req->paddr
-                 << " (0x" << hex << blockAddr(req->paddr) << ")"
+    switch (pkt->cmd) {
+      case Packet::ReadReq:
+
+        if (memcmp(pkt_data, data, pkt->getSize()) != 0) {
+            cerr << name() << ": on read of 0x" << hex << req->getPaddr()
+                 << " (0x" << hex << blockAddr(req->getPaddr()) << ")"
                  << "@ cycle " << dec << curTick
                  << ", cache returns 0x";
-            printData(cerr, req->data, req->size);
+            printData(cerr, pkt_data, pkt->getSize());
             cerr << ", expected 0x";
-            printData(cerr, data, req->size);
+            printData(cerr, data, pkt->getSize());
             cerr << endl;
             fatal("");
         }
@@ -163,13 +233,13 @@ MemTest::completeRequest(MemReqPtr &req, uint8_t *data)
         }
 
         if (numReads >= maxLoads)
-            SimExit(curTick, "Maximum number of loads reached!");
+            exitSimLoop("Maximum number of loads reached!");
         break;
 
-      case Write:
+      case Packet::WriteReq:
         numWritesStat++;
         break;
-
+/*
       case Copy:
         //Also remove dest from outstanding list
         removeAddr = outstandingAddrs.find(req->dest);
@@ -177,36 +247,37 @@ MemTest::completeRequest(MemReqPtr &req, uint8_t *data)
         outstandingAddrs.erase(removeAddr);
         numCopiesStat++;
         break;
-
+*/
       default:
         panic("invalid command");
     }
 
-    if (blockAddr(req->paddr) == traceBlockAddr) {
+    if (blockAddr(req->getPaddr()) == traceBlockAddr) {
         cerr << name() << ": completed "
-             << (req->cmd.isWrite() ? "write" : "read")
+             << (pkt->isWrite() ? "write" : "read")
              << " access of "
-             << dec << req->size << " bytes at address 0x"
-             << hex << req->paddr
-             << " (0x" << hex << blockAddr(req->paddr) << ")"
+             << dec << pkt->getSize() << " bytes at address 0x"
+             << hex << req->getPaddr()
+             << " (0x" << hex << blockAddr(req->getPaddr()) << ")"
              << ", value = 0x";
-        printData(cerr, req->data, req->size);
+        printData(cerr, pkt_data, pkt->getSize());
         cerr << " @ cycle " << dec << curTick;
 
         cerr << endl;
     }
 
     noResponseCycles = 0;
+    delete state;
     delete [] data;
+    delete pkt->req;
+    delete pkt;
 }
 
-
 void
 MemTest::regStats()
 {
     using namespace Stats;
 
-
     numReadsStat
         .name(name() + ".num_reads")
         .desc("number of read accesses completed")
@@ -234,7 +305,7 @@ MemTest::tick()
         fatal("");
     }
 
-    if (cacheInterface->isBlocked()) {
+    if (accessRetry) {
         return;
     }
 
@@ -248,6 +319,9 @@ MemTest::tick()
 
     //If we aren't doing copies, use id as offset, and do a false sharing
     //mem tester
+    // ***** NOTE FOR RON: We're not doing copies, but I'm not sure if this
+    // code should be used.
+/*
     if (percentCopies == 0) {
         //We can eliminate the lower bits of the offset, and then use the id
         //to offset within the blks
@@ -255,23 +329,25 @@ MemTest::tick()
         offset += id;
         access_size = 0;
     }
+*/
 
-    MemReqPtr req = new MemReq();
+    Request *req = new Request();
+    uint32_t flags = req->getFlags();
+    Addr paddr;
 
     if (cacheable < percentUncacheable) {
-        req->flags |= UNCACHEABLE;
-        req->paddr = uncacheAddr + offset;
+        flags |= UNCACHEABLE;
+        paddr = uncacheAddr + offset;
     } else {
-        req->paddr = ((base) ? baseAddr1 : baseAddr2) + offset;
+        paddr = ((base) ? baseAddr1 : baseAddr2) + offset;
     }
     // bool probe = (random() % 2 == 1) && !req->isUncacheable();
     bool probe = false;
 
-    req->size = 1 << access_size;
-    req->data = new uint8_t[req->size];
-    req->paddr &= ~(req->size - 1);
-    req->time = curTick;
-    req->xc = thread->getProxy();
+    paddr &= ~((1 << access_size) - 1);
+    req->setPhys(paddr, 1 << access_size, flags);
+
+    uint8_t *result = new uint8_t[8];
 
     if (cmd < percentReads) {
         // read
@@ -279,60 +355,84 @@ MemTest::tick()
         //For now we only allow one outstanding request per addreess per tester
         //This means we assume CPU does write forwarding to reads that alias something
         //in the cpu store buffer.
-        if (outstandingAddrs.find(req->paddr) != outstandingAddrs.end()) return;
-        else outstandingAddrs.insert(req->paddr);
+        if (outstandingAddrs.find(paddr) != outstandingAddrs.end()) return;
+        else outstandingAddrs.insert(paddr);
 
-        req->cmd = Read;
-        uint8_t *result = new uint8_t[8];
-        checkMem->access(Read, req->paddr, result, req->size);
-        if (blockAddr(req->paddr) == traceBlockAddr) {
+        // ***** NOTE FOR RON: I'm not sure how to access checkMem. - Kevin
+//	checkMem->access(Read, req->getPaddr(), result, req->size);
+        if (blockAddr(paddr) == traceBlockAddr) {
             cerr << name()
                  << ": initiating read "
                  << ((probe) ? "probe of " : "access of ")
-                 << dec << req->size << " bytes from addr 0x"
-                 << hex << req->paddr
-                 << " (0x" << hex << blockAddr(req->paddr) << ")"
+                 << dec << req->getSize() << " bytes from addr 0x"
+                 << hex << paddr
+                 << " (0x" << hex << blockAddr(paddr) << ")"
                  << " at cycle "
                  << dec << curTick << endl;
         }
+
+        Packet *pkt = new Packet(req, Packet::ReadReq, Packet::Broadcast);
+        pkt->dataDynamicArray(new uint8_t[req->getSize()]);
+        MemTestSenderState *state = new MemTestSenderState(result);
+        pkt->senderState = state;
+
         if (probe) {
-            cacheInterface->probeAndUpdate(req);
-            completeRequest(req, result);
+            // ***** NOTE FOR RON: Send functional access?  It used to
+            // be a probeAndUpdate access. - Kevin
+            cachePort.sendFunctional(pkt);
+//	    completeRequest(pkt, result);
         } else {
-            req->completionEvent = new MemCompleteEvent(req, result, this);
-            cacheInterface->access(req);
+//	    req->completionEvent = new MemCompleteEvent(req, result, this);
+            if (!cachePort.sendTiming(pkt)) {
+                accessRetry = true;
+                retryPkt = pkt;
+            }
         }
-    } else if (cmd < (100 - percentCopies)){
+    } else {
         // write
 
         //For now we only allow one outstanding request per addreess per tester
         //This means we assume CPU does write forwarding to reads that alias something
         //in the cpu store buffer.
-        if (outstandingAddrs.find(req->paddr) != outstandingAddrs.end()) return;
-        else outstandingAddrs.insert(req->paddr);
+        if (outstandingAddrs.find(paddr) != outstandingAddrs.end()) return;
+        else outstandingAddrs.insert(paddr);
 
-        req->cmd = Write;
-        memcpy(req->data, &data, req->size);
-        checkMem->access(Write, req->paddr, req->data, req->size);
-        if (blockAddr(req->paddr) == traceBlockAddr) {
+        // ***** NOTE FOR RON: Not sure how to access memory.
+//	checkMem->access(Write, req->paddr, req->data, req->size);
+/*
+        if (blockAddr(req->getPaddr()) == traceBlockAddr) {
             cerr << name() << ": initiating write "
                  << ((probe)?"probe of ":"access of ")
-                 << dec << req->size << " bytes (value = 0x";
-            printData(cerr, req->data, req->size);
+                 << dec << req->getSize() << " bytes (value = 0x";
+            printData(cerr, data_pkt->getPtr(), req->getSize());
             cerr << ") to addr 0x"
-                 << hex << req->paddr
-                 << " (0x" << hex << blockAddr(req->paddr) << ")"
+                 << hex << req->getPaddr()
+                 << " (0x" << hex << blockAddr(req->getPaddr()) << ")"
                  << " at cycle "
                  << dec << curTick << endl;
         }
+*/
+        Packet *pkt = new Packet(req, Packet::WriteReq, Packet::Broadcast);
+        uint8_t *pkt_data = new uint8_t[req->getSize()];
+        pkt->dataDynamicArray(pkt_data);
+        memcpy(pkt_data, &data, req->getSize());
+        MemTestSenderState *state = new MemTestSenderState(result);
+        pkt->senderState = state;
+
         if (probe) {
-            cacheInterface->probeAndUpdate(req);
-            completeRequest(req, NULL);
+            // ***** NOTE FOR RON: Send functional access?  It used to
+            // be a probe access. - Kevin
+            cachePort.sendFunctional(pkt);
+//	    completeRequest(req, NULL);
         } else {
-            req->completionEvent = new MemCompleteEvent(req, NULL, this);
-            cacheInterface->access(req);
+//	    req->completionEvent = new MemCompleteEvent(req, NULL, this);
+            if (!cachePort.sendTiming(pkt)) {
+                accessRetry = true;
+                retryPkt = pkt;
+            }
         }
-    } else {
+    }
+/*    else {
         // copy
         unsigned source_align = random() % 100;
         unsigned dest_align = random() % 100;
@@ -369,38 +469,32 @@ MemTest::tick()
                  << " (0x" << hex << blockAddr(dest) << ")"
                  << " at cycle "
                  << dec << curTick << endl;
-        }
+        }*
         cacheInterface->access(req);
         uint8_t result[blockSize];
         checkMem->access(Read, source, &result, blockSize);
         checkMem->access(Write, dest, &result, blockSize);
     }
+*/
 }
 
-
 void
-MemCompleteEvent::process()
+MemTest::doRetry()
 {
-    tester->completeRequest(req, data);
-    delete this;
-}
-
-
-const char *
-MemCompleteEvent::description()
-{
-    return "memory access completion";
+    if (cachePort.sendTiming(retryPkt)) {
+        accessRetry = false;
+        retryPkt = NULL;
+    }
 }
 
-
 BEGIN_DECLARE_SIM_OBJECT_PARAMS(MemTest)
 
-    SimObjectParam<BaseCache *> cache;
-    SimObjectParam<FunctionalMemory *> main_mem;
-    SimObjectParam<FunctionalMemory *> check_mem;
+//    SimObjectParam<BaseCache *> cache;
+    SimObjectParam<PhysicalMemory *> main_mem;
+    SimObjectParam<PhysicalMemory *> check_mem;
     Param<unsigned> memory_size;
     Param<unsigned> percent_reads;
-    Param<unsigned> percent_copies;
+//    Param<unsigned> percent_copies;
     Param<unsigned> percent_uncacheable;
     Param<unsigned> progress_interval;
     Param<unsigned> percent_source_unaligned;
@@ -413,12 +507,12 @@ END_DECLARE_SIM_OBJECT_PARAMS(MemTest)
 
 BEGIN_INIT_SIM_OBJECT_PARAMS(MemTest)
 
-    INIT_PARAM(cache, "L1 cache"),
+//    INIT_PARAM(cache, "L1 cache"),
     INIT_PARAM(main_mem, "hierarchical memory"),
     INIT_PARAM(check_mem, "check memory"),
     INIT_PARAM(memory_size, "memory size"),
     INIT_PARAM(percent_reads, "target read percentage"),
-    INIT_PARAM(percent_copies, "target copy percentage"),
+//    INIT_PARAM(percent_copies, "target copy percentage"),
     INIT_PARAM(percent_uncacheable, "target uncacheable percentage"),
     INIT_PARAM(progress_interval, "progress report interval (in accesses)"),
     INIT_PARAM(percent_source_unaligned,
@@ -433,8 +527,8 @@ 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_copies,
+    return new MemTest(getInstanceName(), /*cache->getInterface(),*/ main_mem,
+                       check_mem, memory_size, percent_reads, /*percent_copies,*/
                        percent_uncacheable, progress_interval,
                        percent_source_unaligned, percent_dest_unaligned,
                        trace_addr, max_loads);
diff --git a/src/cpu/memtest/memtest.hh b/src/cpu/memtest/memtest.hh
index 42fb235db..a0e58126b 100644
--- a/src/cpu/memtest/memtest.hh
+++ b/src/cpu/memtest/memtest.hh
@@ -35,25 +35,26 @@
 #include <set>
 
 #include "base/statistics.hh"
-#include "mem/functional/functional.hh"
-#include "mem/mem_interface.hh"
+//#include "mem/functional/functional.hh"
+//#include "mem/mem_interface.hh"
 #include "sim/eventq.hh"
 #include "sim/sim_exit.hh"
 #include "sim/sim_object.hh"
 #include "sim/stats.hh"
 
+class PhysicalMemory;
 class ThreadContext;
-class MemTest : public SimObject
+class MemTest : public MemObject
 {
   public:
 
     MemTest(const std::string &name,
-            MemInterface *_cache_interface,
-            FunctionalMemory *main_mem,
-            FunctionalMemory *check_mem,
+//	    MemInterface *_cache_interface,
+            PhysicalMemory *main_mem,
+            PhysicalMemory *check_mem,
             unsigned _memorySize,
             unsigned _percentReads,
-            unsigned _percentCopies,
+//	    unsigned _percentCopies,
             unsigned _percentUncacheable,
             unsigned _progressInterval,
             unsigned _percentSourceUnaligned,
@@ -61,6 +62,8 @@ class MemTest : public SimObject
             Addr _traceAddr,
             Counter _max_loads);
 
+    virtual void init();
+
     // register statistics
     virtual void regStats();
 
@@ -69,6 +72,8 @@ class MemTest : public SimObject
     // main simulation loop (one cycle)
     void tick();
 
+    virtual Port *getPort(const std::string &if_name, int idx = -1);
+
   protected:
     class TickEvent : public Event
     {
@@ -82,16 +87,61 @@ class MemTest : public SimObject
     };
 
     TickEvent tickEvent;
+    class CpuPort : public Port
+    {
+
+        MemTest *memtest;
+
+      public:
+
+        CpuPort(const std::string &_name, MemTest *_memtest)
+            : Port(_name), memtest(_memtest)
+        { }
+
+      protected:
+
+        virtual bool recvTiming(Packet *pkt);
+
+        virtual Tick recvAtomic(Packet *pkt);
+
+        virtual void recvFunctional(Packet *pkt);
+
+        virtual void recvStatusChange(Status status);
+
+        virtual void recvRetry();
+
+        virtual void getDeviceAddressRanges(AddrRangeList &resp,
+            AddrRangeList &snoop)
+        { resp.clear(); snoop.clear(); }
+    };
+
+    CpuPort cachePort;
+
+    class MemTestSenderState : public Packet::SenderState
+    {
+      public:
+        /** Constructor. */
+        MemTestSenderState(uint8_t *_data)
+            : data(_data)
+        { }
 
-    MemInterface *cacheInterface;
-    FunctionalMemory *mainMem;
-    FunctionalMemory *checkMem;
+        // Hold onto data pointer
+        uint8_t *data;
+    };
+
+//    Request *dataReq;
+    Packet  *retryPkt;
+//    MemInterface *cacheInterface;
+    PhysicalMemory *mainMem;
+    PhysicalMemory *checkMem;
     SimpleThread *thread;
 
+    bool accessRetry;
+
     unsigned size;		// size of testing memory region
 
     unsigned percentReads;	// target percentage of read accesses
-    unsigned percentCopies;	// target percentage of copy accesses
+//    unsigned percentCopies;	// target percentage of copy accesses
     unsigned percentUncacheable;
 
     int id;
@@ -128,29 +178,11 @@ class MemTest : public SimObject
     Stats::Scalar<> numCopiesStat;
 
     // called by MemCompleteEvent::process()
-    void completeRequest(MemReqPtr &req, uint8_t *data);
+    void completeRequest(Packet *pkt);
 
-    friend class MemCompleteEvent;
-};
+    void doRetry();
 
-
-class MemCompleteEvent : public Event
-{
-    MemReqPtr req;
-    uint8_t *data;
-    MemTest *tester;
-
-  public:
-
-    MemCompleteEvent(MemReqPtr &_req, uint8_t *_data, MemTest *_tester)
-        : Event(&mainEventQueue),
-          req(_req), data(_data), tester(_tester)
-    {
-    }
-
-    void process();
-
-    virtual const char *description();
+    friend class MemCompleteEvent;
 };
 
 #endif // __CPU_MEMTEST_MEMTEST_HH__