physical.cc (2914:2c524dc023d2) | physical.cc (3012:1d5e18f6a100) |
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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 | 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(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) |
59{ | 59{ |
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) |
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; |
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, |
68 map_flags, -1, 0); 69 | 65 map_flags, -1, 0); 66 |
70 if (pmem_addr == (void *)MAP_FAILED) { | 67 if (pmemAddr == (void *)MAP_FAILED) { |
71 perror("mmap"); 72 fatal("Could not mmap!\n"); 73 } 74 | 68 perror("mmap"); 69 fatal("Could not mmap!\n"); 70 } 71 |
75 page_ptr = 0; | 72 pagePtr = 0; |
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{ |
88 if (pmem_addr) 89 munmap(pmem_addr, pmem_size); | 85 if (pmemAddr) 86 munmap(pmemAddr, params()->addrRange.size()); |
90 //Remove memPorts? 91} 92 93Addr 94PhysicalMemory::new_page() 95{ | 87 //Remove memPorts? 88} 89 90Addr 91PhysicalMemory::new_page() 92{ |
96 Addr return_addr = page_ptr << LogVMPageSize; 97 return_addr += base_addr; | 93 Addr return_addr = pagePtr << LogVMPageSize; 94 return_addr += params()->addrRange.start; |
98 | 95 |
99 ++page_ptr; | 96 ++pagePtr; |
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 |
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{ |
114 assert(pkt->getAddr() + pkt->getSize() < pmem_size); | 116 assert(pkt->getAddr() + pkt->getSize() < params()->addrRange.size()); |
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>(), |
119 pmem_addr + pkt->getAddr() - base_addr, | 121 pmemAddr + pkt->getAddr() - params()->addrRange.start, |
120 pkt->getSize()); 121 break; 122 case Packet::WriteReq: | 122 pkt->getSize()); 123 break; 124 case Packet::WriteReq: |
123 memcpy(pmem_addr + pkt->getAddr() - base_addr, | 125 memcpy(pmemAddr + pkt->getAddr() - params()->addrRange.start, |
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; |
137 return lat; | 139 return calculateLatency(pkt); |
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!"); --- 30 unchanged lines hidden (view full) --- 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!"); --- 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(); |
184 resp.push_back(RangeSize(base_addr, pmem_size)); | 186 resp.push_back(RangeSize(params()->addrRange.start, params()->addrRange.size())); |
185} 186 187int 188PhysicalMemory::MemoryPort::deviceBlockSize() 189{ 190 return memory->deviceBlockSize(); 191} 192 --- 34 unchanged lines hidden (view full) --- 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 --- 34 unchanged lines hidden (view full) --- 229} 230 231void 232PhysicalMemory::serialize(ostream &os) 233{ 234 gzFile compressedMem; 235 string filename = name() + ".physmem"; 236 |
235 SERIALIZE_SCALAR(pmem_size); | |
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 |
251 if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) { | 252 if (gzwrite(compressedMem, pmemAddr, params()->addrRange.size()) != params()->addrRange.size()) { |
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} --- 4 unchanged lines hidden (view full) --- 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} --- 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 |
272 // unmap file that was mmaped in the constructor 273 munmap(pmem_addr, pmem_size); 274 | |
275 string filename; 276 | 273 string filename; 274 |
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 |
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 |
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, |
296 MAP_ANON | MAP_PRIVATE, -1, 0); 297 | 297 MAP_ANON | MAP_PRIVATE, -1, 0); 298 |
298 if (pmem_addr == (void *)MAP_FAILED) { | 299 if (pmemAddr == (void *)MAP_FAILED) { |
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 */ |
309 while (curSize < pmem_size) { | 310 while (curSize < params()->addrRange.size()) { |
310 bytesRead = gzread(compressedMem, tempPage, chunkSize); | 311 bytesRead = gzread(compressedMem, tempPage, chunkSize); |
311 if (bytesRead != chunkSize && bytesRead != pmem_size - curSize) | 312 if (bytesRead != chunkSize && bytesRead != params()->addrRange.size() - curSize) |
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", |
314 filename, bytesRead, chunkSize, pmem_size-curSize); | 315 filename, bytesRead, chunkSize, params()->addrRange.size()-curSize); |
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) { |
321 pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long)); | 322 pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long)); |
322 *pmem_current = *(tempPage+x); 323 } 324 } 325 curSize += bytesRead; 326 } 327 328 free(tempPage); 329 --- 17 unchanged lines hidden (view full) --- 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 --- 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{ |
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); |
357} 358 359REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) | 361} 362 363REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) |