physical.cc revision 2522
12567SN/A/* 22567SN/A * Copyright (c) 2001-2005 The Regents of The University of Michigan 32567SN/A * All rights reserved. 42567SN/A * 52567SN/A * Redistribution and use in source and binary forms, with or without 62567SN/A * modification, are permitted provided that the following conditions are 72567SN/A * met: redistributions of source code must retain the above copyright 82567SN/A * notice, this list of conditions and the following disclaimer; 92567SN/A * redistributions in binary form must reproduce the above copyright 102567SN/A * notice, this list of conditions and the following disclaimer in the 112567SN/A * documentation and/or other materials provided with the distribution; 122567SN/A * neither the name of the copyright holders nor the names of its 132567SN/A * contributors may be used to endorse or promote products derived from 142567SN/A * this software without specific prior written permission. 152567SN/A * 162567SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172567SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182567SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192567SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202567SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212567SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222567SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232567SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242567SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252567SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262567SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu */ 282665Ssaidi@eecs.umich.edu 292567SN/A#include <sys/types.h> 302567SN/A#include <sys/mman.h> 312567SN/A#include <errno.h> 322567SN/A#include <fcntl.h> 332567SN/A#include <unistd.h> 342567SN/A#include <zlib.h> 352567SN/A 362567SN/A#include <cstdio> 372567SN/A#include <iostream> 382567SN/A#include <string> 392567SN/A 404762Snate@binkert.org 412567SN/A#include "base/misc.hh" 422567SN/A#include "config/full_system.hh" 432567SN/A#include "mem/physical.hh" 442567SN/A#include "sim/host.hh" 452567SN/A#include "sim/builder.hh" 462567SN/A#include "sim/eventq.hh" 474762Snate@binkert.org#include "arch/isa_traits.hh" 482567SN/A 492650Ssaidi@eecs.umich.edu 502567SN/Ausing namespace std; 518706Sandreas.hansson@arm.comusing namespace TheISA; 528706Sandreas.hansson@arm.com 532567SN/APhysicalMemory::MemResponseEvent::MemResponseEvent(Packet &pkt, MemoryPort* _m) 542567SN/A : Event(&mainEventQueue, CPU_Tick_Pri), pkt(pkt), memoryPort(_m) 552567SN/A{ 562567SN/A 579292Sandreas.hansson@arm.com this->setFlags(AutoDelete); 589292Sandreas.hansson@arm.com} 592567SN/A 602567SN/Avoid 612567SN/APhysicalMemory::MemResponseEvent::process() 622567SN/A{ 632567SN/A memoryPort->sendTiming(pkt); 642567SN/A} 652567SN/A 662567SN/Aconst char * 672567SN/APhysicalMemory::MemResponseEvent::description() 682567SN/A{ 693745Sgblack@eecs.umich.edu return "Physical Memory Timing Access respnse event"; 703745Sgblack@eecs.umich.edu} 713745Sgblack@eecs.umich.edu 723745Sgblack@eecs.umich.eduPhysicalMemory::PhysicalMemory(const string &n) 733745Sgblack@eecs.umich.edu : MemObject(n), base_addr(0), pmem_addr(NULL) 743745Sgblack@eecs.umich.edu{ 753745Sgblack@eecs.umich.edu // Hardcoded to 128 MB for now. 763745Sgblack@eecs.umich.edu pmem_size = 1 << 27; 773745Sgblack@eecs.umich.edu 782567SN/A if (pmem_size % TheISA::PageBytes != 0) 792567SN/A panic("Memory Size not divisible by page size\n"); 802567SN/A 812567SN/A int map_flags = MAP_ANON | MAP_PRIVATE; 822567SN/A pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, 832567SN/A map_flags, -1, 0); 842567SN/A 852567SN/A if (pmem_addr == (void *)MAP_FAILED) { 862567SN/A perror("mmap"); 873745Sgblack@eecs.umich.edu fatal("Could not mmap!\n"); 883745Sgblack@eecs.umich.edu } 893745Sgblack@eecs.umich.edu 903745Sgblack@eecs.umich.edu page_ptr = 0; 913745Sgblack@eecs.umich.edu} 923745Sgblack@eecs.umich.edu 933745Sgblack@eecs.umich.eduPhysicalMemory::~PhysicalMemory() 943745Sgblack@eecs.umich.edu{ 953745Sgblack@eecs.umich.edu if (pmem_addr) 962650Ssaidi@eecs.umich.edu munmap(pmem_addr, pmem_size); 972650Ssaidi@eecs.umich.edu //Remove memPorts? 982650Ssaidi@eecs.umich.edu} 992567SN/A 1002567SN/AAddr 1012567SN/APhysicalMemory::new_page() 1022567SN/A{ 1032567SN/A Addr return_addr = page_ptr << LogVMPageSize; 1047741Sgblack@eecs.umich.edu return_addr += base_addr; 1057741Sgblack@eecs.umich.edu 1062567SN/A ++page_ptr; 1072567SN/A return return_addr; 1082567SN/A} 1092567SN/A 1102567SN/Aint 1112567SN/APhysicalMemory::deviceBlockSize() 1127741Sgblack@eecs.umich.edu{ 1137741Sgblack@eecs.umich.edu //Can accept anysize request 1142567SN/A return 0; 1152567SN/A} 1162567SN/A 1172567SN/Abool 1182567SN/APhysicalMemory::doTimingAccess (Packet &pkt, MemoryPort* memoryPort) 1192567SN/A{ 1207741Sgblack@eecs.umich.edu doFunctionalAccess(pkt); 1217741Sgblack@eecs.umich.edu 1222567SN/A MemResponseEvent* response = new MemResponseEvent(pkt, memoryPort); 1232567SN/A response->schedule(curTick + lat); 1242567SN/A 1252567SN/A return true; 1267741Sgblack@eecs.umich.edu} 1277741Sgblack@eecs.umich.edu 1283553Sgblack@eecs.umich.eduTick 1293553Sgblack@eecs.umich.eduPhysicalMemory::doAtomicAccess(Packet &pkt) 1303553Sgblack@eecs.umich.edu{ 1313553Sgblack@eecs.umich.edu doFunctionalAccess(pkt); 1322567SN/A return curTick + lat; 1332567SN/A} 1342567SN/A 1352567SN/Avoid 136PhysicalMemory::doFunctionalAccess(Packet &pkt) 137{ 138 assert(pkt.addr + pkt.size < pmem_size); 139 140 switch (pkt.cmd) { 141 case Read: 142 memcpy(pkt.data, pmem_addr + pkt.addr - base_addr, pkt.size); 143 break; 144 case Write: 145 memcpy(pmem_addr + pkt.addr - base_addr, pkt.data, pkt.size); 146 break; 147 default: 148 panic("unimplemented"); 149 } 150 151 pkt.result = Success; 152} 153 154Port * 155PhysicalMemory::getPort(const std::string &if_name) 156{ 157 if (if_name == "") { 158 if (port != NULL) 159 panic("PhysicalMemory::getPort: additional port requested to memory!"); 160 port = new MemoryPort(this); 161 return port; 162 } else if (if_name == "functional") { 163 /* special port for functional writes at startup. */ 164 return new MemoryPort(this); 165 } else { 166 panic("PhysicalMemory::getPort: unknown port %s requested", if_name); 167 } 168} 169 170void 171PhysicalMemory::recvStatusChange(Port::Status status) 172{ 173 panic("??"); 174} 175 176PhysicalMemory::MemoryPort::MemoryPort(PhysicalMemory *_memory) 177 : memory(_memory) 178{ } 179 180void 181PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status) 182{ 183 memory->recvStatusChange(status); 184} 185 186void 187PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp, 188 AddrRangeList &snoop) 189{ 190 memory->getAddressRanges(resp, snoop); 191} 192 193void 194PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 195{ 196 snoop.clear(); 197 resp.clear(); 198 resp.push_back(RangeSize(base_addr, pmem_size)); 199} 200 201int 202PhysicalMemory::MemoryPort::deviceBlockSize() 203{ 204 return memory->deviceBlockSize(); 205} 206 207bool 208PhysicalMemory::MemoryPort::recvTiming(Packet &pkt) 209{ 210 return memory->doTimingAccess(pkt, this); 211} 212 213Tick 214PhysicalMemory::MemoryPort::recvAtomic(Packet &pkt) 215{ 216 return memory->doAtomicAccess(pkt); 217} 218 219void 220PhysicalMemory::MemoryPort::recvFunctional(Packet &pkt) 221{ 222 memory->doFunctionalAccess(pkt); 223} 224 225 226 227void 228PhysicalMemory::serialize(ostream &os) 229{ 230 gzFile compressedMem; 231 string filename = name() + ".physmem"; 232 233 SERIALIZE_SCALAR(pmem_size); 234 SERIALIZE_SCALAR(filename); 235 236 // write memory file 237 string thefile = Checkpoint::dir() + "/" + filename.c_str(); 238 int fd = creat(thefile.c_str(), 0664); 239 if (fd < 0) { 240 perror("creat"); 241 fatal("Can't open physical memory checkpoint file '%s'\n", filename); 242 } 243 244 compressedMem = gzdopen(fd, "wb"); 245 if (compressedMem == NULL) 246 fatal("Insufficient memory to allocate compression state for %s\n", 247 filename); 248 249 if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) { 250 fatal("Write failed on physical memory checkpoint file '%s'\n", 251 filename); 252 } 253 254 if (gzclose(compressedMem)) 255 fatal("Close failed on physical memory checkpoint file '%s'\n", 256 filename); 257} 258 259void 260PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) 261{ 262 gzFile compressedMem; 263 long *tempPage; 264 long *pmem_current; 265 uint64_t curSize; 266 uint32_t bytesRead; 267 const int chunkSize = 16384; 268 269 270 // unmap file that was mmaped in the constructor 271 munmap(pmem_addr, pmem_size); 272 273 string filename; 274 275 UNSERIALIZE_SCALAR(pmem_size); 276 UNSERIALIZE_SCALAR(filename); 277 278 filename = cp->cptDir + "/" + filename; 279 280 // mmap memoryfile 281 int fd = open(filename.c_str(), O_RDONLY); 282 if (fd < 0) { 283 perror("open"); 284 fatal("Can't open physical memory checkpoint file '%s'", filename); 285 } 286 287 compressedMem = gzdopen(fd, "rb"); 288 if (compressedMem == NULL) 289 fatal("Insufficient memory to allocate compression state for %s\n", 290 filename); 291 292 293 pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, 294 MAP_ANON | MAP_PRIVATE, -1, 0); 295 296 if (pmem_addr == (void *)MAP_FAILED) { 297 perror("mmap"); 298 fatal("Could not mmap physical memory!\n"); 299 } 300 301 curSize = 0; 302 tempPage = (long*)malloc(chunkSize); 303 if (tempPage == NULL) 304 fatal("Unable to malloc memory to read file %s\n", filename); 305 306 /* Only copy bytes that are non-zero, so we don't give the VM system hell */ 307 while (curSize < pmem_size) { 308 bytesRead = gzread(compressedMem, tempPage, chunkSize); 309 if (bytesRead != chunkSize && bytesRead != pmem_size - curSize) 310 fatal("Read failed on physical memory checkpoint file '%s'" 311 " got %d bytes, expected %d or %d bytes\n", 312 filename, bytesRead, chunkSize, pmem_size-curSize); 313 314 assert(bytesRead % sizeof(long) == 0); 315 316 for (int x = 0; x < bytesRead/sizeof(long); x++) 317 { 318 if (*(tempPage+x) != 0) { 319 pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long)); 320 *pmem_current = *(tempPage+x); 321 } 322 } 323 curSize += bytesRead; 324 } 325 326 free(tempPage); 327 328 if (gzclose(compressedMem)) 329 fatal("Close failed on physical memory checkpoint file '%s'\n", 330 filename); 331 332} 333 334 335BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 336 337 Param<string> file; 338 Param<Range<Addr> > range; 339 340END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 341 342BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 343 344 INIT_PARAM_DFLT(file, "memory mapped file", ""), 345 INIT_PARAM(range, "Device Address Range") 346 347END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 348 349CREATE_SIM_OBJECT(PhysicalMemory) 350{ 351 352 return new PhysicalMemory(getInstanceName()); 353} 354 355REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) 356