1/* 2 * Copyright (c) 2001-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ron Dreslinski 29 * Ali Saidi 30 */ 31 32#include <sys/types.h> 33#include <sys/mman.h> 34#include <errno.h> 35#include <fcntl.h> 36#include <unistd.h> 37#include <zlib.h> 38 39#include <iostream> 40#include <string> 41 42 43#include "base/misc.hh" 44#include "config/full_system.hh" 45#include "mem/packet_impl.hh" 46#include "mem/physical.hh" 47#include "sim/host.hh" 48#include "sim/builder.hh" 49#include "sim/eventq.hh" 50#include "arch/isa_traits.hh" 51 52 53using namespace std; 54using namespace TheISA; 55 56
| 1/* 2 * Copyright (c) 2001-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ron Dreslinski 29 * Ali Saidi 30 */ 31 32#include <sys/types.h> 33#include <sys/mman.h> 34#include <errno.h> 35#include <fcntl.h> 36#include <unistd.h> 37#include <zlib.h> 38 39#include <iostream> 40#include <string> 41 42 43#include "base/misc.hh" 44#include "config/full_system.hh" 45#include "mem/packet_impl.hh" 46#include "mem/physical.hh" 47#include "sim/host.hh" 48#include "sim/builder.hh" 49#include "sim/eventq.hh" 50#include "arch/isa_traits.hh" 51 52 53using namespace std; 54using namespace TheISA; 55 56
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57PhysicalMemory::PhysicalMemory(const string &n, Tick latency) 58 : MemObject(n),base_addr(0), pmem_addr(NULL), port(NULL), lat(latency)
| 57PhysicalMemory::PhysicalMemory(Params *p) 58 : MemObject(p->name), pmemAddr(NULL), port(NULL), lat(p->latency), _params(p)
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59{
| 59{
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60 // Hardcoded to 128 MB for now. 61 pmem_size = 1 << 27; 62 63 if (pmem_size % TheISA::PageBytes != 0)
| 60 if (params()->addrRange.size() % TheISA::PageBytes != 0)
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64 panic("Memory Size not divisible by page size\n"); 65 66 int map_flags = MAP_ANON | MAP_PRIVATE;
| 61 panic("Memory Size not divisible by page size\n"); 62 63 int map_flags = MAP_ANON | MAP_PRIVATE;
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67 pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE,
| 64 pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE,
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68 map_flags, -1, 0); 69
| 65 map_flags, -1, 0); 66
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70 if (pmem_addr == (void *)MAP_FAILED) {
| 67 if (pmemAddr == (void *)MAP_FAILED) {
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71 perror("mmap"); 72 fatal("Could not mmap!\n"); 73 } 74
| 68 perror("mmap"); 69 fatal("Could not mmap!\n"); 70 } 71
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75 page_ptr = 0;
| 72 pagePtr = 0;
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76} 77 78void 79PhysicalMemory::init() 80{ 81 if (!port) 82 panic("PhysicalMemory not connected to anything!"); 83 port->sendStatusChange(Port::RangeChange); 84} 85 86PhysicalMemory::~PhysicalMemory() 87{
| 73} 74 75void 76PhysicalMemory::init() 77{ 78 if (!port) 79 panic("PhysicalMemory not connected to anything!"); 80 port->sendStatusChange(Port::RangeChange); 81} 82 83PhysicalMemory::~PhysicalMemory() 84{
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88 if (pmem_addr) 89 munmap(pmem_addr, pmem_size);
| 85 if (pmemAddr) 86 munmap(pmemAddr, params()->addrRange.size());
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90 //Remove memPorts? 91} 92 93Addr 94PhysicalMemory::new_page() 95{
| 87 //Remove memPorts? 88} 89 90Addr 91PhysicalMemory::new_page() 92{
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96 Addr return_addr = page_ptr << LogVMPageSize; 97 return_addr += base_addr;
| 93 Addr return_addr = pagePtr << LogVMPageSize; 94 return_addr += params()->addrRange.start;
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98
| 95
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99 ++page_ptr;
| 96 ++pagePtr;
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100 return return_addr; 101} 102 103int 104PhysicalMemory::deviceBlockSize() 105{ 106 //Can accept anysize request 107 return 0; 108} 109
| 97 return return_addr; 98} 99 100int 101PhysicalMemory::deviceBlockSize() 102{ 103 //Can accept anysize request 104 return 0; 105} 106
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| 107Tick 108PhysicalMemory::calculateLatency(Packet *pkt) 109{ 110 return lat; 111}
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110 111Tick 112PhysicalMemory::doFunctionalAccess(Packet *pkt) 113{
| 112 113Tick 114PhysicalMemory::doFunctionalAccess(Packet *pkt) 115{
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114 assert(pkt->getAddr() + pkt->getSize() < pmem_size);
| 116 assert(pkt->getAddr() + pkt->getSize() < params()->addrRange.size());
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115 116 switch (pkt->cmd) { 117 case Packet::ReadReq: 118 memcpy(pkt->getPtr<uint8_t>(),
| 117 118 switch (pkt->cmd) { 119 case Packet::ReadReq: 120 memcpy(pkt->getPtr<uint8_t>(),
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119 pmem_addr + pkt->getAddr() - base_addr,
| 121 pmemAddr + pkt->getAddr() - params()->addrRange.start,
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120 pkt->getSize()); 121 break; 122 case Packet::WriteReq:
| 122 pkt->getSize()); 123 break; 124 case Packet::WriteReq:
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123 memcpy(pmem_addr + pkt->getAddr() - base_addr,
| 125 memcpy(pmemAddr + pkt->getAddr() - params()->addrRange.start,
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124 pkt->getPtr<uint8_t>(), 125 pkt->getSize()); 126 // temporary hack: will need to add real LL/SC implementation 127 // for cacheless systems later. 128 if (pkt->req->getFlags() & LOCKED) { 129 pkt->req->setScResult(1); 130 } 131 break; 132 default: 133 panic("unimplemented"); 134 } 135 136 pkt->result = Packet::Success;
| 126 pkt->getPtr<uint8_t>(), 127 pkt->getSize()); 128 // temporary hack: will need to add real LL/SC implementation 129 // for cacheless systems later. 130 if (pkt->req->getFlags() & LOCKED) { 131 pkt->req->setScResult(1); 132 } 133 break; 134 default: 135 panic("unimplemented"); 136 } 137 138 pkt->result = Packet::Success;
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137 return lat;
| 139 return calculateLatency(pkt);
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138} 139 140Port * 141PhysicalMemory::getPort(const std::string &if_name, int idx) 142{ 143 if (if_name == "port" && idx == -1) { 144 if (port != NULL) 145 panic("PhysicalMemory::getPort: additional port requested to memory!"); 146 port = new MemoryPort(name() + "-port", this); 147 return port; 148 } else if (if_name == "functional") { 149 /* special port for functional writes at startup. */ 150 return new MemoryPort(name() + "-funcport", this); 151 } else { 152 panic("PhysicalMemory::getPort: unknown port %s requested", if_name); 153 } 154} 155 156void 157PhysicalMemory::recvStatusChange(Port::Status status) 158{ 159} 160 161PhysicalMemory::MemoryPort::MemoryPort(const std::string &_name, 162 PhysicalMemory *_memory) 163 : SimpleTimingPort(_name), memory(_memory) 164{ } 165 166void 167PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status) 168{ 169 memory->recvStatusChange(status); 170} 171 172void 173PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp, 174 AddrRangeList &snoop) 175{ 176 memory->getAddressRanges(resp, snoop); 177} 178 179void 180PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 181{ 182 snoop.clear(); 183 resp.clear();
| 140} 141 142Port * 143PhysicalMemory::getPort(const std::string &if_name, int idx) 144{ 145 if (if_name == "port" && idx == -1) { 146 if (port != NULL) 147 panic("PhysicalMemory::getPort: additional port requested to memory!"); 148 port = new MemoryPort(name() + "-port", this); 149 return port; 150 } else if (if_name == "functional") { 151 /* special port for functional writes at startup. */ 152 return new MemoryPort(name() + "-funcport", this); 153 } else { 154 panic("PhysicalMemory::getPort: unknown port %s requested", if_name); 155 } 156} 157 158void 159PhysicalMemory::recvStatusChange(Port::Status status) 160{ 161} 162 163PhysicalMemory::MemoryPort::MemoryPort(const std::string &_name, 164 PhysicalMemory *_memory) 165 : SimpleTimingPort(_name), memory(_memory) 166{ } 167 168void 169PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status) 170{ 171 memory->recvStatusChange(status); 172} 173 174void 175PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp, 176 AddrRangeList &snoop) 177{ 178 memory->getAddressRanges(resp, snoop); 179} 180 181void 182PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 183{ 184 snoop.clear(); 185 resp.clear();
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184 resp.push_back(RangeSize(base_addr, pmem_size));
| 186 resp.push_back(RangeSize(params()->addrRange.start, params()->addrRange.size()));
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185} 186 187int 188PhysicalMemory::MemoryPort::deviceBlockSize() 189{ 190 return memory->deviceBlockSize(); 191} 192 193bool 194PhysicalMemory::MemoryPort::recvTiming(Packet *pkt) 195{ 196 assert(pkt->result != Packet::Nacked); 197 198 Tick latency = memory->doFunctionalAccess(pkt); 199 200 pkt->makeTimingResponse(); 201 sendTiming(pkt, latency); 202 203 return true; 204} 205 206Tick 207PhysicalMemory::MemoryPort::recvAtomic(Packet *pkt) 208{ 209 return memory->doFunctionalAccess(pkt); 210} 211 212void 213PhysicalMemory::MemoryPort::recvFunctional(Packet *pkt) 214{ 215 memory->doFunctionalAccess(pkt); 216} 217 218unsigned int 219PhysicalMemory::drain(Event *de) 220{ 221 int count = port->drain(de); 222 if (count) 223 changeState(Draining); 224 else 225 changeState(Drained); 226 return count; 227} 228 229void 230PhysicalMemory::serialize(ostream &os) 231{ 232 gzFile compressedMem; 233 string filename = name() + ".physmem"; 234
| 187} 188 189int 190PhysicalMemory::MemoryPort::deviceBlockSize() 191{ 192 return memory->deviceBlockSize(); 193} 194 195bool 196PhysicalMemory::MemoryPort::recvTiming(Packet *pkt) 197{ 198 assert(pkt->result != Packet::Nacked); 199 200 Tick latency = memory->doFunctionalAccess(pkt); 201 202 pkt->makeTimingResponse(); 203 sendTiming(pkt, latency); 204 205 return true; 206} 207 208Tick 209PhysicalMemory::MemoryPort::recvAtomic(Packet *pkt) 210{ 211 return memory->doFunctionalAccess(pkt); 212} 213 214void 215PhysicalMemory::MemoryPort::recvFunctional(Packet *pkt) 216{ 217 memory->doFunctionalAccess(pkt); 218} 219 220unsigned int 221PhysicalMemory::drain(Event *de) 222{ 223 int count = port->drain(de); 224 if (count) 225 changeState(Draining); 226 else 227 changeState(Drained); 228 return count; 229} 230 231void 232PhysicalMemory::serialize(ostream &os) 233{ 234 gzFile compressedMem; 235 string filename = name() + ".physmem"; 236
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235 SERIALIZE_SCALAR(pmem_size);
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236 SERIALIZE_SCALAR(filename); 237 238 // write memory file 239 string thefile = Checkpoint::dir() + "/" + filename.c_str(); 240 int fd = creat(thefile.c_str(), 0664); 241 if (fd < 0) { 242 perror("creat"); 243 fatal("Can't open physical memory checkpoint file '%s'\n", filename); 244 } 245 246 compressedMem = gzdopen(fd, "wb"); 247 if (compressedMem == NULL) 248 fatal("Insufficient memory to allocate compression state for %s\n", 249 filename); 250
| 237 SERIALIZE_SCALAR(filename); 238 239 // write memory file 240 string thefile = Checkpoint::dir() + "/" + filename.c_str(); 241 int fd = creat(thefile.c_str(), 0664); 242 if (fd < 0) { 243 perror("creat"); 244 fatal("Can't open physical memory checkpoint file '%s'\n", filename); 245 } 246 247 compressedMem = gzdopen(fd, "wb"); 248 if (compressedMem == NULL) 249 fatal("Insufficient memory to allocate compression state for %s\n", 250 filename); 251
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251 if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) {
| 252 if (gzwrite(compressedMem, pmemAddr, params()->addrRange.size()) != params()->addrRange.size()) {
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252 fatal("Write failed on physical memory checkpoint file '%s'\n", 253 filename); 254 } 255 256 if (gzclose(compressedMem)) 257 fatal("Close failed on physical memory checkpoint file '%s'\n", 258 filename); 259} 260 261void 262PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) 263{ 264 gzFile compressedMem; 265 long *tempPage; 266 long *pmem_current; 267 uint64_t curSize; 268 uint32_t bytesRead; 269 const int chunkSize = 16384; 270 271
| 253 fatal("Write failed on physical memory checkpoint file '%s'\n", 254 filename); 255 } 256 257 if (gzclose(compressedMem)) 258 fatal("Close failed on physical memory checkpoint file '%s'\n", 259 filename); 260} 261 262void 263PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) 264{ 265 gzFile compressedMem; 266 long *tempPage; 267 long *pmem_current; 268 uint64_t curSize; 269 uint32_t bytesRead; 270 const int chunkSize = 16384; 271 272
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272 // unmap file that was mmaped in the constructor 273 munmap(pmem_addr, pmem_size); 274
| |
275 string filename; 276
| 273 string filename; 274
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277 UNSERIALIZE_SCALAR(pmem_size);
| |
278 UNSERIALIZE_SCALAR(filename); 279 280 filename = cp->cptDir + "/" + filename; 281 282 // mmap memoryfile 283 int fd = open(filename.c_str(), O_RDONLY); 284 if (fd < 0) { 285 perror("open"); 286 fatal("Can't open physical memory checkpoint file '%s'", filename); 287 } 288 289 compressedMem = gzdopen(fd, "rb"); 290 if (compressedMem == NULL) 291 fatal("Insufficient memory to allocate compression state for %s\n", 292 filename); 293
| 275 UNSERIALIZE_SCALAR(filename); 276 277 filename = cp->cptDir + "/" + filename; 278 279 // mmap memoryfile 280 int fd = open(filename.c_str(), O_RDONLY); 281 if (fd < 0) { 282 perror("open"); 283 fatal("Can't open physical memory checkpoint file '%s'", filename); 284 } 285 286 compressedMem = gzdopen(fd, "rb"); 287 if (compressedMem == NULL) 288 fatal("Insufficient memory to allocate compression state for %s\n", 289 filename); 290
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| 291 // unmap file that was mmaped in the constructor 292 // This is done here to make sure that gzip and open don't muck with our 293 // nice large space of memory before we reallocate it 294 munmap(pmemAddr, params()->addrRange.size());
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294
| 295
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295 pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE,
| 296 pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE,
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296 MAP_ANON | MAP_PRIVATE, -1, 0); 297
| 297 MAP_ANON | MAP_PRIVATE, -1, 0); 298
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298 if (pmem_addr == (void *)MAP_FAILED) {
| 299 if (pmemAddr == (void *)MAP_FAILED) {
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299 perror("mmap"); 300 fatal("Could not mmap physical memory!\n"); 301 } 302 303 curSize = 0; 304 tempPage = (long*)malloc(chunkSize); 305 if (tempPage == NULL) 306 fatal("Unable to malloc memory to read file %s\n", filename); 307 308 /* Only copy bytes that are non-zero, so we don't give the VM system hell */
| 300 perror("mmap"); 301 fatal("Could not mmap physical memory!\n"); 302 } 303 304 curSize = 0; 305 tempPage = (long*)malloc(chunkSize); 306 if (tempPage == NULL) 307 fatal("Unable to malloc memory to read file %s\n", filename); 308 309 /* Only copy bytes that are non-zero, so we don't give the VM system hell */
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309 while (curSize < pmem_size) {
| 310 while (curSize < params()->addrRange.size()) {
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310 bytesRead = gzread(compressedMem, tempPage, chunkSize);
| 311 bytesRead = gzread(compressedMem, tempPage, chunkSize);
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311 if (bytesRead != chunkSize && bytesRead != pmem_size - curSize)
| 312 if (bytesRead != chunkSize && bytesRead != params()->addrRange.size() - curSize)
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312 fatal("Read failed on physical memory checkpoint file '%s'" 313 " got %d bytes, expected %d or %d bytes\n",
| 313 fatal("Read failed on physical memory checkpoint file '%s'" 314 " got %d bytes, expected %d or %d bytes\n",
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314 filename, bytesRead, chunkSize, pmem_size-curSize);
| 315 filename, bytesRead, chunkSize, params()->addrRange.size()-curSize);
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315 316 assert(bytesRead % sizeof(long) == 0); 317 318 for (int x = 0; x < bytesRead/sizeof(long); x++) 319 { 320 if (*(tempPage+x) != 0) {
| 316 317 assert(bytesRead % sizeof(long) == 0); 318 319 for (int x = 0; x < bytesRead/sizeof(long); x++) 320 { 321 if (*(tempPage+x) != 0) {
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321 pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long));
| 322 pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long));
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322 *pmem_current = *(tempPage+x); 323 } 324 } 325 curSize += bytesRead; 326 } 327 328 free(tempPage); 329 330 if (gzclose(compressedMem)) 331 fatal("Close failed on physical memory checkpoint file '%s'\n", 332 filename); 333 334} 335 336 337BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 338 339 Param<string> file; 340 Param<Range<Addr> > range; 341 Param<Tick> latency; 342 343END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 344 345BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 346 347 INIT_PARAM_DFLT(file, "memory mapped file", ""), 348 INIT_PARAM(range, "Device Address Range"), 349 INIT_PARAM(latency, "Memory access latency") 350 351END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 352 353CREATE_SIM_OBJECT(PhysicalMemory) 354{
| 323 *pmem_current = *(tempPage+x); 324 } 325 } 326 curSize += bytesRead; 327 } 328 329 free(tempPage); 330 331 if (gzclose(compressedMem)) 332 fatal("Close failed on physical memory checkpoint file '%s'\n", 333 filename); 334 335} 336 337 338BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 339 340 Param<string> file; 341 Param<Range<Addr> > range; 342 Param<Tick> latency; 343 344END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 345 346BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 347 348 INIT_PARAM_DFLT(file, "memory mapped file", ""), 349 INIT_PARAM(range, "Device Address Range"), 350 INIT_PARAM(latency, "Memory access latency") 351 352END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 353 354CREATE_SIM_OBJECT(PhysicalMemory) 355{
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355 356 return new PhysicalMemory(getInstanceName(), latency);
| 356 PhysicalMemory::Params *p = new PhysicalMemory::Params; 357 p->name = getInstanceName(); 358 p->addrRange = range; 359 p->latency = latency; 360 return new PhysicalMemory(p);
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357} 358 359REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory)
| 361} 362 363REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory)
|