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; --- 40 unchanged lines hidden (view full) --- 49#include "sim/eventq.hh" 50#include "arch/isa_traits.hh" 51 52 53using namespace std; 54using namespace TheISA; 55 56 |
57PhysicalMemory::PhysicalMemory(Params *p) 58 : MemObject(p->name), pmemAddr(NULL), port(NULL), lat(p->latency), _params(p) |
59{ |
60 if (params()->addrRange.size() % TheISA::PageBytes != 0) |
61 panic("Memory Size not divisible by page size\n"); 62 63 int map_flags = MAP_ANON | MAP_PRIVATE; |
64 pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE, |
65 map_flags, -1, 0); 66 |
67 if (pmemAddr == (void *)MAP_FAILED) { |
68 perror("mmap"); 69 fatal("Could not mmap!\n"); 70 } 71 |
72 pagePtr = 0; |
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{ |
85 if (pmemAddr) 86 munmap(pmemAddr, params()->addrRange.size()); |
87 //Remove memPorts? 88} 89 90Addr 91PhysicalMemory::new_page() 92{ |
93 Addr return_addr = pagePtr << LogVMPageSize; 94 return_addr += params()->addrRange.start; |
95 |
96 ++pagePtr; |
97 return return_addr; 98} 99 100int 101PhysicalMemory::deviceBlockSize() 102{ 103 //Can accept anysize request 104 return 0; 105} 106 |
107Tick 108PhysicalMemory::calculateLatency(Packet *pkt) 109{ 110 return lat; 111} |
112 113Tick 114PhysicalMemory::doFunctionalAccess(Packet *pkt) 115{ |
116 assert(pkt->getAddr() + pkt->getSize() < params()->addrRange.size()); |
117 118 switch (pkt->cmd) { 119 case Packet::ReadReq: 120 memcpy(pkt->getPtr<uint8_t>(), |
121 pmemAddr + pkt->getAddr() - params()->addrRange.start, |
122 pkt->getSize()); 123 break; 124 case Packet::WriteReq: |
125 memcpy(pmemAddr + pkt->getAddr() - params()->addrRange.start, |
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; |
139 return calculateLatency(pkt); |
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!"); --- 30 unchanged lines hidden (view full) --- 178 memory->getAddressRanges(resp, snoop); 179} 180 181void 182PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 183{ 184 snoop.clear(); 185 resp.clear(); |
186 resp.push_back(RangeSize(params()->addrRange.start, params()->addrRange.size())); |
187} 188 189int 190PhysicalMemory::MemoryPort::deviceBlockSize() 191{ 192 return memory->deviceBlockSize(); 193} 194 --- 34 unchanged lines hidden (view full) --- 229} 230 231void 232PhysicalMemory::serialize(ostream &os) 233{ 234 gzFile compressedMem; 235 string filename = name() + ".physmem"; 236 |
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 |
252 if (gzwrite(compressedMem, pmemAddr, params()->addrRange.size()) != params()->addrRange.size()) { |
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} --- 4 unchanged lines hidden (view full) --- 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 |
273 string filename; 274 |
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 |
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()); |
295 |
296 pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE, |
297 MAP_ANON | MAP_PRIVATE, -1, 0); 298 |
299 if (pmemAddr == (void *)MAP_FAILED) { |
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 */ |
310 while (curSize < params()->addrRange.size()) { |
311 bytesRead = gzread(compressedMem, tempPage, chunkSize); |
312 if (bytesRead != chunkSize && bytesRead != params()->addrRange.size() - curSize) |
313 fatal("Read failed on physical memory checkpoint file '%s'" 314 " got %d bytes, expected %d or %d bytes\n", |
315 filename, bytesRead, chunkSize, params()->addrRange.size()-curSize); |
316 317 assert(bytesRead % sizeof(long) == 0); 318 319 for (int x = 0; x < bytesRead/sizeof(long); x++) 320 { 321 if (*(tempPage+x) != 0) { |
322 pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long)); |
323 *pmem_current = *(tempPage+x); 324 } 325 } 326 curSize += bytesRead; 327 } 328 329 free(tempPage); 330 --- 17 unchanged lines hidden (view full) --- 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{ |
356 PhysicalMemory::Params *p = new PhysicalMemory::Params; 357 p->name = getInstanceName(); 358 p->addrRange = range; 359 p->latency = latency; 360 return new PhysicalMemory(p); |
361} 362 363REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) |