abstract_mem.cc revision 2413
113772Sjavier.bueno@metempsy.com/* 213772Sjavier.bueno@metempsy.com * Copyright (c) 2001-2005 The Regents of The University of Michigan 313772Sjavier.bueno@metempsy.com * All rights reserved. 413772Sjavier.bueno@metempsy.com * 513772Sjavier.bueno@metempsy.com * Redistribution and use in source and binary forms, with or without 613772Sjavier.bueno@metempsy.com * modification, are permitted provided that the following conditions are 713772Sjavier.bueno@metempsy.com * met: redistributions of source code must retain the above copyright 813772Sjavier.bueno@metempsy.com * notice, this list of conditions and the following disclaimer; 913772Sjavier.bueno@metempsy.com * redistributions in binary form must reproduce the above copyright 1013772Sjavier.bueno@metempsy.com * notice, this list of conditions and the following disclaimer in the 1113772Sjavier.bueno@metempsy.com * documentation and/or other materials provided with the distribution; 1213772Sjavier.bueno@metempsy.com * neither the name of the copyright holders nor the names of its 1313772Sjavier.bueno@metempsy.com * contributors may be used to endorse or promote products derived from 1413772Sjavier.bueno@metempsy.com * this software without specific prior written permission. 1513772Sjavier.bueno@metempsy.com * 1613772Sjavier.bueno@metempsy.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1713772Sjavier.bueno@metempsy.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1813772Sjavier.bueno@metempsy.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1913772Sjavier.bueno@metempsy.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2013772Sjavier.bueno@metempsy.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2113772Sjavier.bueno@metempsy.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2213772Sjavier.bueno@metempsy.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2313772Sjavier.bueno@metempsy.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2413772Sjavier.bueno@metempsy.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2513772Sjavier.bueno@metempsy.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2613772Sjavier.bueno@metempsy.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2713772Sjavier.bueno@metempsy.com */ 2813772Sjavier.bueno@metempsy.com 2913772Sjavier.bueno@metempsy.com#include <sys/types.h> 3013772Sjavier.bueno@metempsy.com#include <sys/mman.h> 3113772Sjavier.bueno@metempsy.com#include <errno.h> 3213772Sjavier.bueno@metempsy.com#include <fcntl.h> 3313772Sjavier.bueno@metempsy.com#include <unistd.h> 3413772Sjavier.bueno@metempsy.com#include <zlib.h> 3513772Sjavier.bueno@metempsy.com 3613772Sjavier.bueno@metempsy.com#include <cstdio> 3713772Sjavier.bueno@metempsy.com#include <iostream> 3813772Sjavier.bueno@metempsy.com#include <string> 3913772Sjavier.bueno@metempsy.com 4013772Sjavier.bueno@metempsy.com 4113772Sjavier.bueno@metempsy.com#include "base/misc.hh" 4213772Sjavier.bueno@metempsy.com#include "config/full_system.hh" 4313772Sjavier.bueno@metempsy.com#if FULL_SYSTEM 4413772Sjavier.bueno@metempsy.com#include "mem/functional/memory_control.hh" 4513772Sjavier.bueno@metempsy.com#endif 4613963Sodanrc@yahoo.com.br#include "mem/physical.hh" 4713772Sjavier.bueno@metempsy.com#include "sim/host.hh" 4813772Sjavier.bueno@metempsy.com#include "sim/builder.hh" 4913772Sjavier.bueno@metempsy.com#include "targetarch/isa_traits.hh" 5013772Sjavier.bueno@metempsy.com 5113772Sjavier.bueno@metempsy.com 5213772Sjavier.bueno@metempsy.comusing namespace std; 5313772Sjavier.bueno@metempsy.com 5413772Sjavier.bueno@metempsy.com#if FULL_SYSTEM 5513772Sjavier.bueno@metempsy.comPhysicalMemory::PhysicalMemory(const string &n, Range<Addr> range, 5613772Sjavier.bueno@metempsy.com MemoryController *mmu, const std::string &fname) 5713772Sjavier.bueno@metempsy.com : Memory(n), base_addr(range.start), pmem_size(range.size()), 5813772Sjavier.bueno@metempsy.com pmem_addr(NULL) 5913772Sjavier.bueno@metempsy.com{ 6013772Sjavier.bueno@metempsy.com if (pmem_size % TheISA::PageBytes != 0) 6113772Sjavier.bueno@metempsy.com panic("Memory Size not divisible by page size\n"); 6213772Sjavier.bueno@metempsy.com 6313772Sjavier.bueno@metempsy.com mmu->add_child(this, range); 6413772Sjavier.bueno@metempsy.com 6513772Sjavier.bueno@metempsy.com int fd = -1; 6613772Sjavier.bueno@metempsy.com 6713772Sjavier.bueno@metempsy.com if (!fname.empty()) { 6813772Sjavier.bueno@metempsy.com fd = open(fname.c_str(), O_RDWR | O_CREAT, 0644); 6913772Sjavier.bueno@metempsy.com if (fd == -1) { 7013772Sjavier.bueno@metempsy.com perror("open"); 7113772Sjavier.bueno@metempsy.com fatal("Could not open physical memory file: %s\n", fname); 7213772Sjavier.bueno@metempsy.com } 7313772Sjavier.bueno@metempsy.com ftruncate(fd, pmem_size); 7413772Sjavier.bueno@metempsy.com } 7513772Sjavier.bueno@metempsy.com 7613772Sjavier.bueno@metempsy.com int map_flags = (fd == -1) ? (MAP_ANON | MAP_PRIVATE) : MAP_SHARED; 7713772Sjavier.bueno@metempsy.com pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, 7813772Sjavier.bueno@metempsy.com map_flags, fd, 0); 7913772Sjavier.bueno@metempsy.com 8013772Sjavier.bueno@metempsy.com if (fd != -1) 8113772Sjavier.bueno@metempsy.com close(fd); 8213772Sjavier.bueno@metempsy.com 8313772Sjavier.bueno@metempsy.com if (pmem_addr == (void *)MAP_FAILED) { 8413772Sjavier.bueno@metempsy.com perror("mmap"); 8513772Sjavier.bueno@metempsy.com fatal("Could not mmap!\n"); 8613772Sjavier.bueno@metempsy.com } 8713772Sjavier.bueno@metempsy.com 8813963Sodanrc@yahoo.com.br page_ptr = 0; 8913772Sjavier.bueno@metempsy.com} 9013772Sjavier.bueno@metempsy.com#endif 9113772Sjavier.bueno@metempsy.com 9213772Sjavier.bueno@metempsy.comPhysicalMemory::PhysicalMemory(const string &n) 9313772Sjavier.bueno@metempsy.com : Memory(n), memoryPort(this), base_addr(0), pmem_addr(NULL) 9413772Sjavier.bueno@metempsy.com{ 9513772Sjavier.bueno@metempsy.com // Hardcoded to 128 MB for now. 9613772Sjavier.bueno@metempsy.com pmem_size = 1 << 27; 9713963Sodanrc@yahoo.com.br 9813963Sodanrc@yahoo.com.br if (pmem_size % TheISA::PageBytes != 0) 9913963Sodanrc@yahoo.com.br panic("Memory Size not divisible by page size\n"); 10013963Sodanrc@yahoo.com.br 10113963Sodanrc@yahoo.com.br int map_flags = MAP_ANON | MAP_PRIVATE; 10213772Sjavier.bueno@metempsy.com pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, 10313772Sjavier.bueno@metempsy.com map_flags, -1, 0); 10413772Sjavier.bueno@metempsy.com 10513772Sjavier.bueno@metempsy.com if (pmem_addr == (void *)MAP_FAILED) { 10613772Sjavier.bueno@metempsy.com perror("mmap"); 10713772Sjavier.bueno@metempsy.com fatal("Could not mmap!\n"); 10813772Sjavier.bueno@metempsy.com } 10913772Sjavier.bueno@metempsy.com 11013772Sjavier.bueno@metempsy.com page_ptr = 0; 11113772Sjavier.bueno@metempsy.com} 11213963Sodanrc@yahoo.com.br 11313772Sjavier.bueno@metempsy.comPhysicalMemory::~PhysicalMemory() 11413772Sjavier.bueno@metempsy.com{ 11513772Sjavier.bueno@metempsy.com if (pmem_addr) 11613772Sjavier.bueno@metempsy.com munmap(pmem_addr, pmem_size); 11713772Sjavier.bueno@metempsy.com} 11813772Sjavier.bueno@metempsy.com 11913772Sjavier.bueno@metempsy.comAddr 12013772Sjavier.bueno@metempsy.comPhysicalMemory::new_page() 12113772Sjavier.bueno@metempsy.com{ 12213772Sjavier.bueno@metempsy.com Addr return_addr = page_ptr << LogVMPageSize; 12313772Sjavier.bueno@metempsy.com return_addr += base_addr; 12413772Sjavier.bueno@metempsy.com 12513772Sjavier.bueno@metempsy.com ++page_ptr; 12613772Sjavier.bueno@metempsy.com return return_addr; 12713772Sjavier.bueno@metempsy.com} 12813772Sjavier.bueno@metempsy.com 12913772Sjavier.bueno@metempsy.com// 13013772Sjavier.bueno@metempsy.com// little helper for better prot_* error messages 13113772Sjavier.bueno@metempsy.com// 13213772Sjavier.bueno@metempsy.comvoid 13313772Sjavier.bueno@metempsy.comPhysicalMemory::prot_access_error(Addr addr, int size, const string &func) 13413772Sjavier.bueno@metempsy.com{ 13513772Sjavier.bueno@metempsy.com panic("invalid physical memory access!\n" 13613772Sjavier.bueno@metempsy.com "%s: %s(addr=%#x, size=%d) out of range (max=%#x)\n", 13713772Sjavier.bueno@metempsy.com name(), func, addr, size, pmem_size - 1); 13813772Sjavier.bueno@metempsy.com} 13913772Sjavier.bueno@metempsy.com 14013772Sjavier.bueno@metempsy.comvoid 14113772Sjavier.bueno@metempsy.comPhysicalMemory::prot_read(Addr addr, uint8_t *p, int size) 14213772Sjavier.bueno@metempsy.com{ 14313772Sjavier.bueno@metempsy.com if (addr + size >= pmem_size) 14413772Sjavier.bueno@metempsy.com prot_access_error(addr, size, "prot_read"); 14513772Sjavier.bueno@metempsy.com 14613772Sjavier.bueno@metempsy.com memcpy(p, pmem_addr + addr - base_addr, size); 14713772Sjavier.bueno@metempsy.com} 14813772Sjavier.bueno@metempsy.com 14913772Sjavier.bueno@metempsy.comvoid 15013772Sjavier.bueno@metempsy.comPhysicalMemory::prot_write(Addr addr, const uint8_t *p, int size) 15113772Sjavier.bueno@metempsy.com{ 15213772Sjavier.bueno@metempsy.com if (addr + size >= pmem_size) 15313772Sjavier.bueno@metempsy.com prot_access_error(addr, size, "prot_write"); 15413772Sjavier.bueno@metempsy.com 15513772Sjavier.bueno@metempsy.com memcpy(pmem_addr + addr - base_addr, p, size); 15613772Sjavier.bueno@metempsy.com} 15713772Sjavier.bueno@metempsy.com 15813772Sjavier.bueno@metempsy.comvoid 15913772Sjavier.bueno@metempsy.comPhysicalMemory::prot_memset(Addr addr, uint8_t val, int size) 16013772Sjavier.bueno@metempsy.com{ 16113772Sjavier.bueno@metempsy.com if (addr + size >= pmem_size) 16213772Sjavier.bueno@metempsy.com prot_access_error(addr, size, "prot_memset"); 16313772Sjavier.bueno@metempsy.com 16413772Sjavier.bueno@metempsy.com memset(pmem_addr + addr - base_addr, val, size); 16513772Sjavier.bueno@metempsy.com} 16613772Sjavier.bueno@metempsy.com 16713772Sjavier.bueno@metempsy.comint 16813772Sjavier.bueno@metempsy.comPhysicalMemory::deviceBlockSize() 16913772Sjavier.bueno@metempsy.com{ 17013772Sjavier.bueno@metempsy.com //Can accept anysize request 17113772Sjavier.bueno@metempsy.com return 0; 17213772Sjavier.bueno@metempsy.com} 17313772Sjavier.bueno@metempsy.com 17413772Sjavier.bueno@metempsy.combool 17513772Sjavier.bueno@metempsy.comPhysicalMemory::doTimingAccess (Packet &pkt) 17613772Sjavier.bueno@metempsy.com{ 17713772Sjavier.bueno@metempsy.com doFunctionalAccess(pkt); 17813772Sjavier.bueno@metempsy.com //Schedule a response event at curTick + lat; 17913772Sjavier.bueno@metempsy.com return true; 18013772Sjavier.bueno@metempsy.com} 18113772Sjavier.bueno@metempsy.com 18213772Sjavier.bueno@metempsy.comTick 18313772Sjavier.bueno@metempsy.comPhysicalMemory::doAtomicAccess(Packet &pkt) 18413772Sjavier.bueno@metempsy.com{ 18513772Sjavier.bueno@metempsy.com doFunctionalAccess(pkt); 18613772Sjavier.bueno@metempsy.com return curTick + lat; 18713772Sjavier.bueno@metempsy.com} 18813772Sjavier.bueno@metempsy.com 18913772Sjavier.bueno@metempsy.comvoid 19013772Sjavier.bueno@metempsy.comPhysicalMemory::doFunctionalAccess(Packet &pkt) 19113772Sjavier.bueno@metempsy.com{ 19213772Sjavier.bueno@metempsy.com switch (pkt.cmd) { 19313772Sjavier.bueno@metempsy.com case Read: 19413772Sjavier.bueno@metempsy.com prot_read(pkt.addr, (uint8_t *)pkt.data, pkt.size); 19513772Sjavier.bueno@metempsy.com 196 case Write: 197 prot_write(pkt.addr, (uint8_t *)pkt.data, pkt.size); 198 199 default: 200 panic("unimplemented"); 201 } 202} 203 204Port * 205PhysicalMemory::getPort(const char *if_name) 206{ 207 return &memoryPort; 208} 209 210void 211PhysicalMemory::recvStatusChange(Port::Status status) 212{ 213 panic("??"); 214} 215 216PhysicalMemory::MemoryPort::MemoryPort(PhysicalMemory *_memory) 217 : memory(_memory) 218{ } 219 220void 221PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status) 222{ 223 memory->recvStatusChange(status); 224} 225 226void 227PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &range_list, 228 bool &owner) 229{ 230 panic("??"); 231} 232 233 234bool 235PhysicalMemory::MemoryPort::recvTiming(Packet &pkt) 236{ 237 return memory->doTimingAccess(pkt); 238} 239 240Tick 241PhysicalMemory::MemoryPort::recvAtomic(Packet &pkt) 242{ 243 return memory->doAtomicAccess(pkt); 244} 245 246void 247PhysicalMemory::MemoryPort::recvFunctional(Packet &pkt) 248{ 249 memory->doFunctionalAccess(pkt); 250} 251 252 253 254void 255PhysicalMemory::serialize(ostream &os) 256{ 257 gzFile compressedMem; 258 string filename = name() + ".physmem"; 259 260 SERIALIZE_SCALAR(pmem_size); 261 SERIALIZE_SCALAR(filename); 262 263 // write memory file 264 string thefile = Checkpoint::dir() + "/" + filename.c_str(); 265 int fd = creat(thefile.c_str(), 0664); 266 if (fd < 0) { 267 perror("creat"); 268 fatal("Can't open physical memory checkpoint file '%s'\n", filename); 269 } 270 271 compressedMem = gzdopen(fd, "wb"); 272 if (compressedMem == NULL) 273 fatal("Insufficient memory to allocate compression state for %s\n", 274 filename); 275 276 if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) { 277 fatal("Write failed on physical memory checkpoint file '%s'\n", 278 filename); 279 } 280 281 if (gzclose(compressedMem)) 282 fatal("Close failed on physical memory checkpoint file '%s'\n", 283 filename); 284} 285 286void 287PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) 288{ 289 gzFile compressedMem; 290 long *tempPage; 291 long *pmem_current; 292 uint64_t curSize; 293 uint32_t bytesRead; 294 const int chunkSize = 16384; 295 296 297 // unmap file that was mmaped in the constructor 298 munmap(pmem_addr, pmem_size); 299 300 string filename; 301 302 UNSERIALIZE_SCALAR(pmem_size); 303 UNSERIALIZE_SCALAR(filename); 304 305 filename = cp->cptDir + "/" + filename; 306 307 // mmap memoryfile 308 int fd = open(filename.c_str(), O_RDONLY); 309 if (fd < 0) { 310 perror("open"); 311 fatal("Can't open physical memory checkpoint file '%s'", filename); 312 } 313 314 compressedMem = gzdopen(fd, "rb"); 315 if (compressedMem == NULL) 316 fatal("Insufficient memory to allocate compression state for %s\n", 317 filename); 318 319 320 pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, 321 MAP_ANON | MAP_PRIVATE, -1, 0); 322 323 if (pmem_addr == (void *)MAP_FAILED) { 324 perror("mmap"); 325 fatal("Could not mmap physical memory!\n"); 326 } 327 328 curSize = 0; 329 tempPage = (long*)malloc(chunkSize); 330 if (tempPage == NULL) 331 fatal("Unable to malloc memory to read file %s\n", filename); 332 333 /* Only copy bytes that are non-zero, so we don't give the VM system hell */ 334 while (curSize < pmem_size) { 335 bytesRead = gzread(compressedMem, tempPage, chunkSize); 336 if (bytesRead != chunkSize && bytesRead != pmem_size - curSize) 337 fatal("Read failed on physical memory checkpoint file '%s'" 338 " got %d bytes, expected %d or %d bytes\n", 339 filename, bytesRead, chunkSize, pmem_size-curSize); 340 341 assert(bytesRead % sizeof(long) == 0); 342 343 for (int x = 0; x < bytesRead/sizeof(long); x++) 344 { 345 if (*(tempPage+x) != 0) { 346 pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long)); 347 *pmem_current = *(tempPage+x); 348 } 349 } 350 curSize += bytesRead; 351 } 352 353 free(tempPage); 354 355 if (gzclose(compressedMem)) 356 fatal("Close failed on physical memory checkpoint file '%s'\n", 357 filename); 358 359} 360 361 362BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 363 364 Param<string> file; 365#if FULL_SYSTEM 366 SimObjectParam<MemoryController *> mmu; 367#endif 368 Param<Range<Addr> > range; 369 370END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 371 372BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 373 374 INIT_PARAM_DFLT(file, "memory mapped file", ""), 375#if FULL_SYSTEM 376 INIT_PARAM(mmu, "Memory Controller"), 377#endif 378 INIT_PARAM(range, "Device Address Range") 379 380END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 381 382CREATE_SIM_OBJECT(PhysicalMemory) 383{ 384#if FULL_SYSTEM 385 if (mmu) { 386 return new PhysicalMemory(getInstanceName(), range, mmu, file); 387 } 388#endif 389 390 return new PhysicalMemory(getInstanceName()); 391} 392 393REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) 394