physical.cc revision 2499
111986Sandreas.sandberg@arm.com/* 211986Sandreas.sandberg@arm.com * Copyright (c) 2001-2005 The Regents of The University of Michigan 311986Sandreas.sandberg@arm.com * All rights reserved. 411986Sandreas.sandberg@arm.com * 511986Sandreas.sandberg@arm.com * Redistribution and use in source and binary forms, with or without 611986Sandreas.sandberg@arm.com * modification, are permitted provided that the following conditions are 711986Sandreas.sandberg@arm.com * met: redistributions of source code must retain the above copyright 811986Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer; 914299Sbbruce@ucdavis.edu * redistributions in binary form must reproduce the above copyright 1014299Sbbruce@ucdavis.edu * notice, this list of conditions and the following disclaimer in the 1114299Sbbruce@ucdavis.edu * documentation and/or other materials provided with the distribution; 1214299Sbbruce@ucdavis.edu * 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 29#include <sys/types.h> 30#include <sys/mman.h> 31#include <errno.h> 32#include <fcntl.h> 33#include <unistd.h> 34#include <zlib.h> 35 36#include <cstdio> 37#include <iostream> 38#include <string> 39 40 41#include "base/misc.hh" 42#include "config/full_system.hh" 43#include "mem/physical.hh" 44#include "sim/host.hh" 45#include "sim/builder.hh" 46#include "sim/eventq.hh" 47#include "arch/isa_traits.hh" 48 49 50using namespace std; 51using namespace TheISA; 52 53PhysicalMemory::MemResponseEvent::MemResponseEvent(Packet &pkt, MemoryPort* _m) 54 : Event(&mainEventQueue, CPU_Tick_Pri), pkt(pkt), memoryPort(_m) 55{ 56 57 this->setFlags(AutoDelete); 58} 59 60void 61PhysicalMemory::MemResponseEvent::process() 62{ 63 memoryPort->sendTiming(pkt); 64} 65 66const char * 67PhysicalMemory::MemResponseEvent::description() 68{ 69 return "Physical Memory Timing Access respnse event"; 70} 71 72PhysicalMemory::PhysicalMemory(const string &n) 73 : MemObject(n), base_addr(0), pmem_addr(NULL) 74{ 75 // Hardcoded to 128 MB for now. 76 pmem_size = 1 << 27; 77 78 if (pmem_size % TheISA::PageBytes != 0) 79 panic("Memory Size not divisible by page size\n"); 80 81 int map_flags = MAP_ANON | MAP_PRIVATE; 82 pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, 83 map_flags, -1, 0); 84 85 if (pmem_addr == (void *)MAP_FAILED) { 86 perror("mmap"); 87 fatal("Could not mmap!\n"); 88 } 89 90 page_ptr = 0; 91} 92 93PhysicalMemory::~PhysicalMemory() 94{ 95 if (pmem_addr) 96 munmap(pmem_addr, pmem_size); 97 //Remove memPorts? 98} 99 100Addr 101PhysicalMemory::new_page() 102{ 103 Addr return_addr = page_ptr << LogVMPageSize; 104 return_addr += base_addr; 105 106 ++page_ptr; 107 return return_addr; 108} 109 110int 111PhysicalMemory::deviceBlockSize() 112{ 113 //Can accept anysize request 114 return 0; 115} 116 117bool 118PhysicalMemory::doTimingAccess (Packet &pkt, MemoryPort* memoryPort) 119{ 120 doFunctionalAccess(pkt); 121 122 MemResponseEvent* response = new MemResponseEvent(pkt, memoryPort); 123 response->schedule(curTick + lat); 124 125 return true; 126} 127 128Tick 129PhysicalMemory::doAtomicAccess(Packet &pkt) 130{ 131 doFunctionalAccess(pkt); 132 return curTick + lat; 133} 134 135void 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 { 163 panic("PhysicalMemory::getPort: unknown port %s requested", if_name); 164 } 165} 166 167void 168PhysicalMemory::recvStatusChange(Port::Status status) 169{ 170 panic("??"); 171} 172 173PhysicalMemory::MemoryPort::MemoryPort(PhysicalMemory *_memory) 174 : memory(_memory) 175{ } 176 177void 178PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status) 179{ 180 memory->recvStatusChange(status); 181} 182 183void 184PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &range_list, 185 bool &owner) 186{ 187 memory->getAddressRanges(range_list, owner); 188} 189 190void 191PhysicalMemory::getAddressRanges(AddrRangeList &range_list, bool &owner) 192{ 193 owner = true; 194 range_list.clear(); 195 range_list.push_back(RangeSize(base_addr, pmem_size)); 196} 197 198int 199PhysicalMemory::MemoryPort::deviceBlockSize() 200{ 201 return memory->deviceBlockSize(); 202} 203 204bool 205PhysicalMemory::MemoryPort::recvTiming(Packet &pkt) 206{ 207 return memory->doTimingAccess(pkt, this); 208} 209 210Tick 211PhysicalMemory::MemoryPort::recvAtomic(Packet &pkt) 212{ 213 return memory->doAtomicAccess(pkt); 214} 215 216void 217PhysicalMemory::MemoryPort::recvFunctional(Packet &pkt) 218{ 219 memory->doFunctionalAccess(pkt); 220} 221 222 223 224void 225PhysicalMemory::serialize(ostream &os) 226{ 227 gzFile compressedMem; 228 string filename = name() + ".physmem"; 229 230 SERIALIZE_SCALAR(pmem_size); 231 SERIALIZE_SCALAR(filename); 232 233 // write memory file 234 string thefile = Checkpoint::dir() + "/" + filename.c_str(); 235 int fd = creat(thefile.c_str(), 0664); 236 if (fd < 0) { 237 perror("creat"); 238 fatal("Can't open physical memory checkpoint file '%s'\n", filename); 239 } 240 241 compressedMem = gzdopen(fd, "wb"); 242 if (compressedMem == NULL) 243 fatal("Insufficient memory to allocate compression state for %s\n", 244 filename); 245 246 if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) { 247 fatal("Write failed on physical memory checkpoint file '%s'\n", 248 filename); 249 } 250 251 if (gzclose(compressedMem)) 252 fatal("Close failed on physical memory checkpoint file '%s'\n", 253 filename); 254} 255 256void 257PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) 258{ 259 gzFile compressedMem; 260 long *tempPage; 261 long *pmem_current; 262 uint64_t curSize; 263 uint32_t bytesRead; 264 const int chunkSize = 16384; 265 266 267 // unmap file that was mmaped in the constructor 268 munmap(pmem_addr, pmem_size); 269 270 string filename; 271 272 UNSERIALIZE_SCALAR(pmem_size); 273 UNSERIALIZE_SCALAR(filename); 274 275 filename = cp->cptDir + "/" + filename; 276 277 // mmap memoryfile 278 int fd = open(filename.c_str(), O_RDONLY); 279 if (fd < 0) { 280 perror("open"); 281 fatal("Can't open physical memory checkpoint file '%s'", filename); 282 } 283 284 compressedMem = gzdopen(fd, "rb"); 285 if (compressedMem == NULL) 286 fatal("Insufficient memory to allocate compression state for %s\n", 287 filename); 288 289 290 pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, 291 MAP_ANON | MAP_PRIVATE, -1, 0); 292 293 if (pmem_addr == (void *)MAP_FAILED) { 294 perror("mmap"); 295 fatal("Could not mmap physical memory!\n"); 296 } 297 298 curSize = 0; 299 tempPage = (long*)malloc(chunkSize); 300 if (tempPage == NULL) 301 fatal("Unable to malloc memory to read file %s\n", filename); 302 303 /* Only copy bytes that are non-zero, so we don't give the VM system hell */ 304 while (curSize < pmem_size) { 305 bytesRead = gzread(compressedMem, tempPage, chunkSize); 306 if (bytesRead != chunkSize && bytesRead != pmem_size - curSize) 307 fatal("Read failed on physical memory checkpoint file '%s'" 308 " got %d bytes, expected %d or %d bytes\n", 309 filename, bytesRead, chunkSize, pmem_size-curSize); 310 311 assert(bytesRead % sizeof(long) == 0); 312 313 for (int x = 0; x < bytesRead/sizeof(long); x++) 314 { 315 if (*(tempPage+x) != 0) { 316 pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long)); 317 *pmem_current = *(tempPage+x); 318 } 319 } 320 curSize += bytesRead; 321 } 322 323 free(tempPage); 324 325 if (gzclose(compressedMem)) 326 fatal("Close failed on physical memory checkpoint file '%s'\n", 327 filename); 328 329} 330 331 332BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) 333 334 Param<string> file; 335#if FULL_SYSTEM 336 SimObjectParam<MemoryController *> mmu; 337#endif 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#if FULL_SYSTEM 346 INIT_PARAM(mmu, "Memory Controller"), 347#endif 348 INIT_PARAM(range, "Device Address Range") 349 350END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) 351 352CREATE_SIM_OBJECT(PhysicalMemory) 353{ 354#if FULL_SYSTEM 355 if (mmu) { 356 return new PhysicalMemory(getInstanceName(), range, mmu, file); 357 } 358#endif 359 360 return new PhysicalMemory(getInstanceName()); 361} 362 363REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) 364