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-rw-r--r--src/mem/physical.cc48
-rw-r--r--src/mem/physical.hh8
2 files changed, 37 insertions, 19 deletions
diff --git a/src/mem/physical.cc b/src/mem/physical.cc
index 081fbb4cb..889794db6 100644
--- a/src/mem/physical.cc
+++ b/src/mem/physical.cc
@@ -31,6 +31,7 @@
#include <sys/types.h>
#include <sys/mman.h>
+#include <sys/user.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
@@ -41,6 +42,7 @@
#include <string>
#include "arch/registers.hh"
+#include "base/intmath.hh"
#include "base/misc.hh"
#include "base/random.hh"
#include "base/types.hh"
@@ -56,26 +58,39 @@ using namespace TheISA;
PhysicalMemory::PhysicalMemory(const Params *p)
: MemObject(p), pmemAddr(NULL), pagePtr(0),
lat(p->latency), lat_var(p->latency_var),
- cachedSize(params()->range.size()), cachedStart(params()->range.start)
+ _size(params()->range.size()), _start(params()->range.start)
{
- if (params()->range.size() % TheISA::PageBytes != 0)
+ if (size() % TheISA::PageBytes != 0)
panic("Memory Size not divisible by page size\n");
if (params()->null)
return;
- int map_flags = MAP_ANON | MAP_PRIVATE;
- pmemAddr = (uint8_t *)mmap(NULL, params()->range.size(),
- PROT_READ | PROT_WRITE, map_flags, -1, 0);
+
+ 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(), PAGE_SIZE),
+ PROT_READ | PROT_WRITE, map_flags, fd, 0);
+ }
if (pmemAddr == (void *)MAP_FAILED) {
perror("mmap");
- fatal("Could not mmap!\n");
+ 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, p->range.size());
+ memset(pmemAddr, 0, size());
}
void
@@ -94,8 +109,7 @@ PhysicalMemory::init()
PhysicalMemory::~PhysicalMemory()
{
if (pmemAddr)
- munmap((char*)pmemAddr, params()->range.size());
- //Remove memPorts?
+ munmap((char*)pmemAddr, size());
}
Addr
@@ -408,7 +422,7 @@ PhysicalMemory::getAddressRanges(AddrRangeList &resp, bool &snoop)
{
snoop = false;
resp.clear();
- resp.push_back(RangeSize(start(), params()->range.size()));
+ resp.push_back(RangeSize(start(), size()));
}
unsigned
@@ -463,6 +477,7 @@ PhysicalMemory::serialize(ostream &os)
string filename = name() + ".physmem";
SERIALIZE_SCALAR(filename);
+ SERIALIZE_SCALAR(_size);
// write memory file
string thefile = Checkpoint::dir() + "/" + filename.c_str();
@@ -477,8 +492,7 @@ PhysicalMemory::serialize(ostream &os)
fatal("Insufficient memory to allocate compression state for %s\n",
filename);
- if (gzwrite(compressedMem, pmemAddr, params()->range.size()) !=
- (int)params()->range.size()) {
+ if (gzwrite(compressedMem, pmemAddr, size()) != (int)size()) {
fatal("Write failed on physical memory checkpoint file '%s'\n",
filename);
}
@@ -522,9 +536,13 @@ PhysicalMemory::unserialize(Checkpoint *cp, const string &section)
// unmap file that was mmaped 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, params()->range.size());
+ munmap((char*)pmemAddr, size());
+
+ UNSERIALIZE_SCALAR(_size);
+ if (size() > params()->range.size())
+ fatal("Memory size has changed!\n");
- pmemAddr = (uint8_t *)mmap(NULL, params()->range.size(),
+ pmemAddr = (uint8_t *)mmap(NULL, size(),
PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
if (pmemAddr == (void *)MAP_FAILED) {
@@ -538,7 +556,7 @@ PhysicalMemory::unserialize(Checkpoint *cp, const string &section)
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 < params()->range.size()) {
+ while (curSize < size()) {
bytesRead = gzread(compressedMem, tempPage, chunkSize);
if (bytesRead == 0)
break;
diff --git a/src/mem/physical.hh b/src/mem/physical.hh
index dae6b42af..290e2bbae 100644
--- a/src/mem/physical.hh
+++ b/src/mem/physical.hh
@@ -149,12 +149,12 @@ class PhysicalMemory : public MemObject
std::vector<MemoryPort*> ports;
typedef std::vector<MemoryPort*>::iterator PortIterator;
- uint64_t cachedSize;
- uint64_t cachedStart;
+ uint64_t _size;
+ uint64_t _start;
public:
Addr new_page();
- uint64_t size() { return cachedSize; }
- uint64_t start() { return cachedStart; }
+ uint64_t size() { return _size; }
+ uint64_t start() { return _start; }
public:
typedef PhysicalMemoryParams Params;