/*
- * Copyright (c) 2010 ARM Limited
+ * Copyright (c) 2012 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
- * Copyright (c) 2001-2005 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
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * Authors: Ron Dreslinski
- * Ali Saidi
+ * Authors: Andreas Hansson
*/
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/user.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <zlib.h>
-
-#include <cerrno>
-#include <cstdio>
-#include <iostream>
-#include <string>
-
-#include "arch/isa_traits.hh"
-#include "arch/registers.hh"
-#include "base/intmath.hh"
-#include "base/misc.hh"
-#include "base/random.hh"
-#include "base/types.hh"
-#include "config/the_isa.hh"
-#include "debug/LLSC.hh"
-#include "debug/MemoryAccess.hh"
-#include "mem/packet_access.hh"
+#include "debug/BusAddrRanges.hh"
#include "mem/physical.hh"
-#include "sim/eventq.hh"
using namespace std;
-using namespace TheISA;
-
-PhysicalMemory::PhysicalMemory(const Params *p)
- : MemObject(p), pmemAddr(NULL), lat(p->latency), lat_var(p->latency_var),
- _size(params()->range.size()), _start(params()->range.start)
-{
- if (size() % TheISA::PageBytes != 0)
- panic("Memory Size not divisible by page size\n");
-
- if (params()->null)
- return;
-
-
- if (params()->file == "") {
- int map_flags = MAP_ANON | MAP_PRIVATE;
- pmemAddr = (uint8_t *)mmap(NULL, size(),
- PROT_READ | PROT_WRITE, map_flags, -1, 0);
- } else {
- int map_flags = MAP_PRIVATE;
- int fd = open(params()->file.c_str(), O_RDONLY);
- _size = lseek(fd, 0, SEEK_END);
- lseek(fd, 0, SEEK_SET);
- pmemAddr = (uint8_t *)mmap(NULL, roundUp(size(), sysconf(_SC_PAGESIZE)),
- PROT_READ | PROT_WRITE, map_flags, fd, 0);
- }
-
- if (pmemAddr == (void *)MAP_FAILED) {
- perror("mmap");
- if (params()->file == "")
- fatal("Could not mmap!\n");
- else
- fatal("Could not find file: %s\n", params()->file);
- }
-
- //If requested, initialize all the memory to 0
- if (p->zero)
- memset(pmemAddr, 0, size());
-}
-
-void
-PhysicalMemory::init()
-{
- if (ports.size() == 0) {
- fatal("PhysicalMemory object %s is unconnected!", name());
- }
-
- for (PortIterator pi = ports.begin(); pi != ports.end(); ++pi) {
- if (*pi)
- (*pi)->sendStatusChange(Port::RangeChange);
- }
-}
-PhysicalMemory::~PhysicalMemory()
+PhysicalMemory::PhysicalMemory(const vector<AbstractMemory*>& _memories) :
+ size(0)
{
- if (pmemAddr)
- munmap((char*)pmemAddr, size());
-}
-
-unsigned
-PhysicalMemory::deviceBlockSize() const
-{
- //Can accept anysize request
- return 0;
-}
-
-Tick
-PhysicalMemory::calculateLatency(PacketPtr pkt)
-{
- Tick latency = lat;
- if (lat_var != 0)
- latency += random_mt.random<Tick>(0, lat_var);
- return latency;
-}
-
-
-
-// Add load-locked to tracking list. Should only be called if the
-// operation is a load and the LLSC flag is set.
-void
-PhysicalMemory::trackLoadLocked(PacketPtr pkt)
-{
- Request *req = pkt->req;
- Addr paddr = LockedAddr::mask(req->getPaddr());
+ for (vector<AbstractMemory*>::const_iterator m = _memories.begin();
+ m != _memories.end(); ++m) {
+ // only add the memory if it is part of the global address map
+ if ((*m)->isInAddrMap()) {
+ memories.push_back(*m);
- // first we check if we already have a locked addr for this
- // xc. Since each xc only gets one, we just update the
- // existing record with the new address.
- list<LockedAddr>::iterator i;
+ // calculate the total size once and for all
+ size += (*m)->size();
- for (i = lockedAddrList.begin(); i != lockedAddrList.end(); ++i) {
- if (i->matchesContext(req)) {
- DPRINTF(LLSC, "Modifying lock record: context %d addr %#x\n",
- req->contextId(), paddr);
- i->addr = paddr;
- return;
+ // add the range to our interval tree and make sure it does not
+ // intersect an existing range
+ if (addrMap.insert((*m)->getAddrRange(), *m) == addrMap.end())
+ fatal("Memory address range for %s is overlapping\n",
+ (*m)->name());
}
+ DPRINTF(BusAddrRanges,
+ "Skipping memory %s that is not in global address map\n",
+ (*m)->name());
}
-
- // no record for this xc: need to allocate a new one
- DPRINTF(LLSC, "Adding lock record: context %d addr %#x\n",
- req->contextId(), paddr);
- lockedAddrList.push_front(LockedAddr(req));
+ rangeCache.invalidate();
}
-
-// Called on *writes* only... both regular stores and
-// store-conditional operations. Check for conventional stores which
-// conflict with locked addresses, and for success/failure of store
-// conditionals.
bool
-PhysicalMemory::checkLockedAddrList(PacketPtr pkt)
-{
- Request *req = pkt->req;
- Addr paddr = LockedAddr::mask(req->getPaddr());
- bool isLLSC = pkt->isLLSC();
-
- // Initialize return value. Non-conditional stores always
- // succeed. Assume conditional stores will fail until proven
- // otherwise.
- bool success = !isLLSC;
-
- // Iterate over list. Note that there could be multiple matching
- // records, as more than one context could have done a load locked
- // to this location.
- list<LockedAddr>::iterator i = lockedAddrList.begin();
-
- while (i != lockedAddrList.end()) {
-
- if (i->addr == paddr) {
- // we have a matching address
-
- if (isLLSC && i->matchesContext(req)) {
- // it's a store conditional, and as far as the memory
- // system can tell, the requesting context's lock is
- // still valid.
- DPRINTF(LLSC, "StCond success: context %d addr %#x\n",
- req->contextId(), paddr);
- success = true;
- }
-
- // Get rid of our record of this lock and advance to next
- DPRINTF(LLSC, "Erasing lock record: context %d addr %#x\n",
- i->contextId, paddr);
- i = lockedAddrList.erase(i);
- }
- else {
- // no match: advance to next record
- ++i;
+PhysicalMemory::isMemAddr(Addr addr) const
+{
+ // see if the address is within the last matched range
+ if (addr != rangeCache) {
+ // lookup in the interval tree
+ range_map<Addr, AbstractMemory*>::const_iterator r =
+ addrMap.find(addr);
+ if (r == addrMap.end()) {
+ // not in the cache, and not in the tree
+ return false;
}
+ // the range is in the tree, update the cache
+ rangeCache = r->first;
}
- if (isLLSC) {
- req->setExtraData(success ? 1 : 0);
- }
+ assert(addrMap.find(addr) != addrMap.end());
- return success;
+ // either matched the cache or found in the tree
+ return true;
}
-
-#if TRACING_ON
-
-#define CASE(A, T) \
- case sizeof(T): \
- DPRINTF(MemoryAccess,"%s of size %i on address 0x%x data 0x%x\n", \
- A, pkt->getSize(), pkt->getAddr(), pkt->get<T>()); \
- break
-
-
-#define TRACE_PACKET(A) \
- do { \
- switch (pkt->getSize()) { \
- CASE(A, uint64_t); \
- CASE(A, uint32_t); \
- CASE(A, uint16_t); \
- CASE(A, uint8_t); \
- default: \
- DPRINTF(MemoryAccess, "%s of size %i on address 0x%x\n", \
- A, pkt->getSize(), pkt->getAddr()); \
- DDUMP(MemoryAccess, pkt->getPtr<uint8_t>(), pkt->getSize());\
- } \
- } while (0)
-
-#else
-
-#define TRACE_PACKET(A)
-
-#endif
-
-Tick
-PhysicalMemory::doAtomicAccess(PacketPtr pkt)
+AddrRangeList
+PhysicalMemory::getConfAddrRanges() const
{
- assert(pkt->getAddr() >= start() &&
- pkt->getAddr() + pkt->getSize() <= start() + size());
-
- if (pkt->memInhibitAsserted()) {
- DPRINTF(MemoryAccess, "mem inhibited on 0x%x: not responding\n",
- pkt->getAddr());
- return 0;
- }
-
- uint8_t *hostAddr = pmemAddr + pkt->getAddr() - start();
-
- if (pkt->cmd == MemCmd::SwapReq) {
- IntReg overwrite_val;
- bool overwrite_mem;
- uint64_t condition_val64;
- uint32_t condition_val32;
-
- if (!pmemAddr)
- panic("Swap only works if there is real memory (i.e. null=False)");
- assert(sizeof(IntReg) >= pkt->getSize());
-
- overwrite_mem = true;
- // keep a copy of our possible write value, and copy what is at the
- // memory address into the packet
- std::memcpy(&overwrite_val, pkt->getPtr<uint8_t>(), pkt->getSize());
- std::memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize());
-
- if (pkt->req->isCondSwap()) {
- if (pkt->getSize() == sizeof(uint64_t)) {
- condition_val64 = pkt->req->getExtraData();
- overwrite_mem = !std::memcmp(&condition_val64, hostAddr,
- sizeof(uint64_t));
- } else if (pkt->getSize() == sizeof(uint32_t)) {
- condition_val32 = (uint32_t)pkt->req->getExtraData();
- overwrite_mem = !std::memcmp(&condition_val32, hostAddr,
- sizeof(uint32_t));
- } else
- panic("Invalid size for conditional read/write\n");
+ // this could be done once in the constructor, but since it is unlikely to
+ // be called more than once the iteration should not be a problem
+ AddrRangeList ranges;
+ for (vector<AbstractMemory*>::const_iterator m = memories.begin();
+ m != memories.end(); ++m) {
+ if ((*m)->isConfReported()) {
+ ranges.push_back((*m)->getAddrRange());
}
-
- if (overwrite_mem)
- std::memcpy(hostAddr, &overwrite_val, pkt->getSize());
-
- assert(!pkt->req->isInstFetch());
- TRACE_PACKET("Read/Write");
- } else if (pkt->isRead()) {
- assert(!pkt->isWrite());
- if (pkt->isLLSC()) {
- trackLoadLocked(pkt);
- }
- if (pmemAddr)
- memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize());
- TRACE_PACKET(pkt->req->isInstFetch() ? "IFetch" : "Read");
- } else if (pkt->isWrite()) {
- if (writeOK(pkt)) {
- if (pmemAddr)
- memcpy(hostAddr, pkt->getPtr<uint8_t>(), pkt->getSize());
- assert(!pkt->req->isInstFetch());
- TRACE_PACKET("Write");
- }
- } else if (pkt->isInvalidate()) {
- //upgrade or invalidate
- if (pkt->needsResponse()) {
- pkt->makeAtomicResponse();
- }
- } else {
- panic("unimplemented");
}
- if (pkt->needsResponse()) {
- pkt->makeAtomicResponse();
- }
- return calculateLatency(pkt);
+ return ranges;
}
-
void
-PhysicalMemory::doFunctionalAccess(PacketPtr pkt)
+PhysicalMemory::access(PacketPtr pkt)
{
- assert(pkt->getAddr() >= start() &&
- pkt->getAddr() + pkt->getSize() <= start() + size());
-
-
- uint8_t *hostAddr = pmemAddr + pkt->getAddr() - start();
-
- if (pkt->isRead()) {
- if (pmemAddr)
- memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize());
- TRACE_PACKET("Read");
- pkt->makeAtomicResponse();
- } else if (pkt->isWrite()) {
- if (pmemAddr)
- memcpy(hostAddr, pkt->getPtr<uint8_t>(), pkt->getSize());
- TRACE_PACKET("Write");
- pkt->makeAtomicResponse();
- } else if (pkt->isPrint()) {
- Packet::PrintReqState *prs =
- dynamic_cast<Packet::PrintReqState*>(pkt->senderState);
- // Need to call printLabels() explicitly since we're not going
- // through printObj().
- prs->printLabels();
- // Right now we just print the single byte at the specified address.
- ccprintf(prs->os, "%s%#x\n", prs->curPrefix(), *hostAddr);
- } else {
- panic("PhysicalMemory: unimplemented functional command %s",
- pkt->cmdString());
- }
-}
-
-
-Port *
-PhysicalMemory::getPort(const std::string &if_name, int idx)
-{
- // Accept request for "functional" port for backwards compatibility
- // with places where this function is called from C++. I'd prefer
- // to move all these into Python someday.
- if (if_name == "functional") {
- return new MemoryPort(csprintf("%s-functional", name()), this);
- }
-
- if (if_name != "port") {
- panic("PhysicalMemory::getPort: unknown port %s requested", if_name);
- }
-
- if (idx >= (int)ports.size()) {
- ports.resize(idx + 1);
- }
-
- if (ports[idx] != NULL) {
- panic("PhysicalMemory::getPort: port %d already assigned", idx);
- }
-
- MemoryPort *port =
- new MemoryPort(csprintf("%s-port%d", name(), idx), this);
-
- ports[idx] = port;
- return port;
-}
-
-
-void
-PhysicalMemory::recvStatusChange(Port::Status status)
-{
-}
-
-PhysicalMemory::MemoryPort::MemoryPort(const std::string &_name,
- PhysicalMemory *_memory)
- : SimpleTimingPort(_name, _memory), memory(_memory)
-{ }
-
-void
-PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status)
-{
- memory->recvStatusChange(status);
-}
-
-void
-PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp,
- bool &snoop)
-{
- memory->getAddressRanges(resp, snoop);
-}
-
-void
-PhysicalMemory::getAddressRanges(AddrRangeList &resp, bool &snoop)
-{
- snoop = false;
- resp.clear();
- resp.push_back(RangeSize(start(), size()));
-}
-
-unsigned
-PhysicalMemory::MemoryPort::deviceBlockSize() const
-{
- return memory->deviceBlockSize();
-}
-
-Tick
-PhysicalMemory::MemoryPort::recvAtomic(PacketPtr pkt)
-{
- return memory->doAtomicAccess(pkt);
-}
-
-void
-PhysicalMemory::MemoryPort::recvFunctional(PacketPtr pkt)
-{
- pkt->pushLabel(memory->name());
-
- if (!checkFunctional(pkt)) {
- // Default implementation of SimpleTimingPort::recvFunctional()
- // calls recvAtomic() and throws away the latency; we can save a
- // little here by just not calculating the latency.
- memory->doFunctionalAccess(pkt);
- }
-
- pkt->popLabel();
-}
-
-unsigned int
-PhysicalMemory::drain(Event *de)
-{
- int count = 0;
- for (PortIterator pi = ports.begin(); pi != ports.end(); ++pi) {
- count += (*pi)->drain(de);
- }
-
- if (count)
- changeState(Draining);
- else
- changeState(Drained);
- return count;
+ assert(pkt->isRequest());
+ Addr addr = pkt->getAddr();
+ range_map<Addr, AbstractMemory*>::const_iterator m = addrMap.find(addr);
+ assert(m != addrMap.end());
+ m->second->access(pkt);
}
void
-PhysicalMemory::serialize(ostream &os)
-{
- if (!pmemAddr)
- return;
-
- gzFile compressedMem;
- string filename = name() + ".physmem";
-
- SERIALIZE_SCALAR(filename);
- SERIALIZE_SCALAR(_size);
-
- // write memory file
- string thefile = Checkpoint::dir() + "/" + filename.c_str();
- int fd = creat(thefile.c_str(), 0664);
- if (fd < 0) {
- perror("creat");
- fatal("Can't open physical memory checkpoint file '%s'\n", filename);
- }
-
- compressedMem = gzdopen(fd, "wb");
- if (compressedMem == NULL)
- fatal("Insufficient memory to allocate compression state for %s\n",
- filename);
-
- if (gzwrite(compressedMem, pmemAddr, size()) != (int)size()) {
- fatal("Write failed on physical memory checkpoint file '%s'\n",
- filename);
- }
-
- if (gzclose(compressedMem))
- fatal("Close failed on physical memory checkpoint file '%s'\n",
- filename);
-
- list<LockedAddr>::iterator i = lockedAddrList.begin();
-
- vector<Addr> lal_addr;
- vector<int> lal_cid;
- while (i != lockedAddrList.end()) {
- lal_addr.push_back(i->addr);
- lal_cid.push_back(i->contextId);
- i++;
- }
- arrayParamOut(os, "lal_addr", lal_addr);
- arrayParamOut(os, "lal_cid", lal_cid);
-}
-
-void
-PhysicalMemory::unserialize(Checkpoint *cp, const string §ion)
-{
- if (!pmemAddr)
- return;
-
- gzFile compressedMem;
- long *tempPage;
- long *pmem_current;
- uint64_t curSize;
- uint32_t bytesRead;
- const uint32_t chunkSize = 16384;
-
- string filename;
-
- UNSERIALIZE_SCALAR(filename);
-
- filename = cp->cptDir + "/" + filename;
-
- // mmap memoryfile
- int fd = open(filename.c_str(), O_RDONLY);
- if (fd < 0) {
- perror("open");
- fatal("Can't open physical memory checkpoint file '%s'", filename);
- }
-
- compressedMem = gzdopen(fd, "rb");
- if (compressedMem == NULL)
- fatal("Insufficient memory to allocate compression state for %s\n",
- filename);
-
- // unmap file that was mmapped in the constructor
- // This is done here to make sure that gzip and open don't muck with our
- // nice large space of memory before we reallocate it
- munmap((char*)pmemAddr, size());
-
- UNSERIALIZE_SCALAR(_size);
- if (size() > params()->range.size())
- fatal("Memory size has changed!\n");
-
- pmemAddr = (uint8_t *)mmap(NULL, size(),
- PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
-
- if (pmemAddr == (void *)MAP_FAILED) {
- perror("mmap");
- fatal("Could not mmap physical memory!\n");
- }
-
- curSize = 0;
- tempPage = (long*)malloc(chunkSize);
- if (tempPage == NULL)
- fatal("Unable to malloc memory to read file %s\n", filename);
-
- /* Only copy bytes that are non-zero, so we don't give the VM system hell */
- while (curSize < size()) {
- bytesRead = gzread(compressedMem, tempPage, chunkSize);
- if (bytesRead == 0)
- break;
-
- assert(bytesRead % sizeof(long) == 0);
-
- for (uint32_t x = 0; x < bytesRead / sizeof(long); x++)
- {
- if (*(tempPage+x) != 0) {
- pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long));
- *pmem_current = *(tempPage+x);
- }
- }
- curSize += bytesRead;
- }
-
- free(tempPage);
-
- if (gzclose(compressedMem))
- fatal("Close failed on physical memory checkpoint file '%s'\n",
- filename);
-
- vector<Addr> lal_addr;
- vector<int> lal_cid;
- arrayParamIn(cp, section, "lal_addr", lal_addr);
- arrayParamIn(cp, section, "lal_cid", lal_cid);
- for(int i = 0; i < lal_addr.size(); i++)
- lockedAddrList.push_front(LockedAddr(lal_addr[i], lal_cid[i]));
-}
-
-PhysicalMemory *
-PhysicalMemoryParams::create()
+PhysicalMemory::functionalAccess(PacketPtr pkt)
{
- return new PhysicalMemory(this);
+ assert(pkt->isRequest());
+ Addr addr = pkt->getAddr();
+ range_map<Addr, AbstractMemory*>::const_iterator m = addrMap.find(addr);
+ assert(m != addrMap.end());
+ m->second->functionalAccess(pkt);
}
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