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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * 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 * Authors: Ron Dreslinski
29 * Ali Saidi
30 */
31
32#include <sys/types.h>
33#include <sys/mman.h>
34#include <errno.h>
35#include <fcntl.h>
36#include <unistd.h>
37#include <zlib.h>
38
39#include <iostream>
40#include <string>
41
42
43#include "base/misc.hh"
44#include "config/full_system.hh"
45#include "mem/packet_impl.hh"
46#include "mem/physical.hh"
47#include "sim/host.hh"
48#include "sim/builder.hh"
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
| 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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * 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 * Authors: Ron Dreslinski
29 * Ali Saidi
30 */
31
32#include <sys/types.h>
33#include <sys/mman.h>
34#include <errno.h>
35#include <fcntl.h>
36#include <unistd.h>
37#include <zlib.h>
38
39#include <iostream>
40#include <string>
41
42
43#include "base/misc.hh"
44#include "config/full_system.hh"
45#include "mem/packet_impl.hh"
46#include "mem/physical.hh"
47#include "sim/host.hh"
48#include "sim/builder.hh"
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
|
| 113
114
115// Add load-locked to tracking list. Should only be called if the
116// operation is a load and the LOCKED flag is set.
|
113void
| 117void
|
| 118PhysicalMemory::trackLoadLocked(Request *req)
119{
120 Addr paddr = LockedAddr::mask(req->getPaddr());
121
122 // first we check if we already have a locked addr for this
123 // xc. Since each xc only gets one, we just update the
124 // existing record with the new address.
125 list<LockedAddr>::iterator i;
126
127 for (i = lockedAddrList.begin(); i != lockedAddrList.end(); ++i) {
128 if (i->matchesContext(req)) {
129 DPRINTF(LLSC, "Modifying lock record: cpu %d thread %d addr %#x\n",
130 req->getCpuNum(), req->getThreadNum(), paddr);
131 i->addr = paddr;
132 return;
133 }
134 }
135
136 // no record for this xc: need to allocate a new one
137 DPRINTF(LLSC, "Adding lock record: cpu %d thread %d addr %#x\n",
138 req->getCpuNum(), req->getThreadNum(), paddr);
139 lockedAddrList.push_front(LockedAddr(req));
140}
141
142
143// Called on *writes* only... both regular stores and
144// store-conditional operations. Check for conventional stores which
145// conflict with locked addresses, and for success/failure of store
146// conditionals.
147bool
148PhysicalMemory::checkLockedAddrList(Request *req)
149{
150 Addr paddr = LockedAddr::mask(req->getPaddr());
151 bool isLocked = req->isLocked();
152
153 // Initialize return value. Non-conditional stores always
154 // succeed. Assume conditional stores will fail until proven
155 // otherwise.
156 bool success = !isLocked;
157
158 // Iterate over list. Note that there could be multiple matching
159 // records, as more than one context could have done a load locked
160 // to this location.
161 list<LockedAddr>::iterator i = lockedAddrList.begin();
162
163 while (i != lockedAddrList.end()) {
164
165 if (i->addr == paddr) {
166 // we have a matching address
167
168 if (isLocked && i->matchesContext(req)) {
169 // it's a store conditional, and as far as the memory
170 // system can tell, the requesting context's lock is
171 // still valid.
172 DPRINTF(LLSC, "StCond success: cpu %d thread %d addr %#x\n",
173 req->getCpuNum(), req->getThreadNum(), paddr);
174 success = true;
175 }
176
177 // Get rid of our record of this lock and advance to next
178 DPRINTF(LLSC, "Erasing lock record: cpu %d thread %d addr %#x\n",
179 i->cpuNum, i->threadNum, paddr);
180 i = lockedAddrList.erase(i);
181 }
182 else {
183 // no match: advance to next record
184 ++i;
185 }
186 }
187
188 if (isLocked) {
189 req->setScResult(success ? 1 : 0);
190 }
191
192 return success;
193}
194
195void
|
114PhysicalMemory::doFunctionalAccess(Packet *pkt)
115{
116 assert(pkt->getAddr() + pkt->getSize() < params()->addrRange.size());
117
118 switch (pkt->cmd) {
119 case Packet::ReadReq:
| 196PhysicalMemory::doFunctionalAccess(Packet *pkt)
197{
198 assert(pkt->getAddr() + pkt->getSize() < params()->addrRange.size());
199
200 switch (pkt->cmd) {
201 case Packet::ReadReq:
|
| 202 if (pkt->req->isLocked()) {
203 trackLoadLocked(pkt->req);
204 }
|
120 memcpy(pkt->getPtr<uint8_t>(),
121 pmemAddr + pkt->getAddr() - params()->addrRange.start,
122 pkt->getSize());
123 break;
124 case Packet::WriteReq:
| 205 memcpy(pkt->getPtr<uint8_t>(),
206 pmemAddr + pkt->getAddr() - params()->addrRange.start,
207 pkt->getSize());
208 break;
209 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);
| 210 if (writeOK(pkt->req)) {
211 memcpy(pmemAddr + pkt->getAddr() - params()->addrRange.start,
212 pkt->getPtr<uint8_t>(), pkt->getSize());
|
132 }
133 break;
134 default:
135 panic("unimplemented");
136 }
137
138 pkt->result = Packet::Success;
139}
140
141Port *
142PhysicalMemory::getPort(const std::string &if_name, int idx)
143{
144 if (if_name == "port" && idx == -1) {
145 if (port != NULL)
146 panic("PhysicalMemory::getPort: additional port requested to memory!");
147 port = new MemoryPort(name() + "-port", this);
148 return port;
149 } else if (if_name == "functional") {
150 /* special port for functional writes at startup. */
151 return new MemoryPort(name() + "-funcport", this);
152 } else {
153 panic("PhysicalMemory::getPort: unknown port %s requested", if_name);
154 }
155}
156
157void
158PhysicalMemory::recvStatusChange(Port::Status status)
159{
160}
161
162PhysicalMemory::MemoryPort::MemoryPort(const std::string &_name,
163 PhysicalMemory *_memory)
164 : SimpleTimingPort(_name), memory(_memory)
165{ }
166
167void
168PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status)
169{
170 memory->recvStatusChange(status);
171}
172
173void
174PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp,
175 AddrRangeList &snoop)
176{
177 memory->getAddressRanges(resp, snoop);
178}
179
180void
181PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
182{
183 snoop.clear();
184 resp.clear();
185 resp.push_back(RangeSize(params()->addrRange.start,
186 params()->addrRange.size()));
187}
188
189int
190PhysicalMemory::MemoryPort::deviceBlockSize()
191{
192 return memory->deviceBlockSize();
193}
194
195Tick
196PhysicalMemory::MemoryPort::recvAtomic(Packet *pkt)
197{
198 memory->doFunctionalAccess(pkt);
199 return memory->calculateLatency(pkt);
200}
201
202void
203PhysicalMemory::MemoryPort::recvFunctional(Packet *pkt)
204{
205 // Default implementation of SimpleTimingPort::recvFunctional()
206 // calls recvAtomic() and throws away the latency; we can save a
207 // little here by just not calculating the latency.
208 memory->doFunctionalAccess(pkt);
209}
210
211unsigned int
212PhysicalMemory::drain(Event *de)
213{
214 int count = port->drain(de);
215 if (count)
216 changeState(Draining);
217 else
218 changeState(Drained);
219 return count;
220}
221
222void
223PhysicalMemory::serialize(ostream &os)
224{
225 gzFile compressedMem;
226 string filename = name() + ".physmem";
227
228 SERIALIZE_SCALAR(filename);
229
230 // write memory file
231 string thefile = Checkpoint::dir() + "/" + filename.c_str();
232 int fd = creat(thefile.c_str(), 0664);
233 if (fd < 0) {
234 perror("creat");
235 fatal("Can't open physical memory checkpoint file '%s'\n", filename);
236 }
237
238 compressedMem = gzdopen(fd, "wb");
239 if (compressedMem == NULL)
240 fatal("Insufficient memory to allocate compression state for %s\n",
241 filename);
242
243 if (gzwrite(compressedMem, pmemAddr, params()->addrRange.size()) != params()->addrRange.size()) {
244 fatal("Write failed on physical memory checkpoint file '%s'\n",
245 filename);
246 }
247
248 if (gzclose(compressedMem))
249 fatal("Close failed on physical memory checkpoint file '%s'\n",
250 filename);
251}
252
253void
254PhysicalMemory::unserialize(Checkpoint *cp, const string §ion)
255{
256 gzFile compressedMem;
257 long *tempPage;
258 long *pmem_current;
259 uint64_t curSize;
260 uint32_t bytesRead;
261 const int chunkSize = 16384;
262
263
264 string filename;
265
266 UNSERIALIZE_SCALAR(filename);
267
268 filename = cp->cptDir + "/" + filename;
269
270 // mmap memoryfile
271 int fd = open(filename.c_str(), O_RDONLY);
272 if (fd < 0) {
273 perror("open");
274 fatal("Can't open physical memory checkpoint file '%s'", filename);
275 }
276
277 compressedMem = gzdopen(fd, "rb");
278 if (compressedMem == NULL)
279 fatal("Insufficient memory to allocate compression state for %s\n",
280 filename);
281
282 // unmap file that was mmaped in the constructor
283 // This is done here to make sure that gzip and open don't muck with our
284 // nice large space of memory before we reallocate it
285 munmap(pmemAddr, params()->addrRange.size());
286
287 pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE,
288 MAP_ANON | MAP_PRIVATE, -1, 0);
289
290 if (pmemAddr == (void *)MAP_FAILED) {
291 perror("mmap");
292 fatal("Could not mmap physical memory!\n");
293 }
294
295 curSize = 0;
296 tempPage = (long*)malloc(chunkSize);
297 if (tempPage == NULL)
298 fatal("Unable to malloc memory to read file %s\n", filename);
299
300 /* Only copy bytes that are non-zero, so we don't give the VM system hell */
301 while (curSize < params()->addrRange.size()) {
302 bytesRead = gzread(compressedMem, tempPage, chunkSize);
303 if (bytesRead != chunkSize && bytesRead != params()->addrRange.size() - curSize)
304 fatal("Read failed on physical memory checkpoint file '%s'"
305 " got %d bytes, expected %d or %d bytes\n",
306 filename, bytesRead, chunkSize, params()->addrRange.size()-curSize);
307
308 assert(bytesRead % sizeof(long) == 0);
309
310 for (int x = 0; x < bytesRead/sizeof(long); x++)
311 {
312 if (*(tempPage+x) != 0) {
313 pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long));
314 *pmem_current = *(tempPage+x);
315 }
316 }
317 curSize += bytesRead;
318 }
319
320 free(tempPage);
321
322 if (gzclose(compressedMem))
323 fatal("Close failed on physical memory checkpoint file '%s'\n",
324 filename);
325
326}
327
328
329BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
330
331 Param<string> file;
332 Param<Range<Addr> > range;
333 Param<Tick> latency;
334
335END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
336
337BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
338
339 INIT_PARAM_DFLT(file, "memory mapped file", ""),
340 INIT_PARAM(range, "Device Address Range"),
341 INIT_PARAM(latency, "Memory access latency")
342
343END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
344
345CREATE_SIM_OBJECT(PhysicalMemory)
346{
347 PhysicalMemory::Params *p = new PhysicalMemory::Params;
348 p->name = getInstanceName();
349 p->addrRange = range;
350 p->latency = latency;
351 return new PhysicalMemory(p);
352}
353
354REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory)
| 213 }
214 break;
215 default:
216 panic("unimplemented");
217 }
218
219 pkt->result = Packet::Success;
220}
221
222Port *
223PhysicalMemory::getPort(const std::string &if_name, int idx)
224{
225 if (if_name == "port" && idx == -1) {
226 if (port != NULL)
227 panic("PhysicalMemory::getPort: additional port requested to memory!");
228 port = new MemoryPort(name() + "-port", this);
229 return port;
230 } else if (if_name == "functional") {
231 /* special port for functional writes at startup. */
232 return new MemoryPort(name() + "-funcport", this);
233 } else {
234 panic("PhysicalMemory::getPort: unknown port %s requested", if_name);
235 }
236}
237
238void
239PhysicalMemory::recvStatusChange(Port::Status status)
240{
241}
242
243PhysicalMemory::MemoryPort::MemoryPort(const std::string &_name,
244 PhysicalMemory *_memory)
245 : SimpleTimingPort(_name), memory(_memory)
246{ }
247
248void
249PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status)
250{
251 memory->recvStatusChange(status);
252}
253
254void
255PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp,
256 AddrRangeList &snoop)
257{
258 memory->getAddressRanges(resp, snoop);
259}
260
261void
262PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
263{
264 snoop.clear();
265 resp.clear();
266 resp.push_back(RangeSize(params()->addrRange.start,
267 params()->addrRange.size()));
268}
269
270int
271PhysicalMemory::MemoryPort::deviceBlockSize()
272{
273 return memory->deviceBlockSize();
274}
275
276Tick
277PhysicalMemory::MemoryPort::recvAtomic(Packet *pkt)
278{
279 memory->doFunctionalAccess(pkt);
280 return memory->calculateLatency(pkt);
281}
282
283void
284PhysicalMemory::MemoryPort::recvFunctional(Packet *pkt)
285{
286 // Default implementation of SimpleTimingPort::recvFunctional()
287 // calls recvAtomic() and throws away the latency; we can save a
288 // little here by just not calculating the latency.
289 memory->doFunctionalAccess(pkt);
290}
291
292unsigned int
293PhysicalMemory::drain(Event *de)
294{
295 int count = port->drain(de);
296 if (count)
297 changeState(Draining);
298 else
299 changeState(Drained);
300 return count;
301}
302
303void
304PhysicalMemory::serialize(ostream &os)
305{
306 gzFile compressedMem;
307 string filename = name() + ".physmem";
308
309 SERIALIZE_SCALAR(filename);
310
311 // write memory file
312 string thefile = Checkpoint::dir() + "/" + filename.c_str();
313 int fd = creat(thefile.c_str(), 0664);
314 if (fd < 0) {
315 perror("creat");
316 fatal("Can't open physical memory checkpoint file '%s'\n", filename);
317 }
318
319 compressedMem = gzdopen(fd, "wb");
320 if (compressedMem == NULL)
321 fatal("Insufficient memory to allocate compression state for %s\n",
322 filename);
323
324 if (gzwrite(compressedMem, pmemAddr, params()->addrRange.size()) != params()->addrRange.size()) {
325 fatal("Write failed on physical memory checkpoint file '%s'\n",
326 filename);
327 }
328
329 if (gzclose(compressedMem))
330 fatal("Close failed on physical memory checkpoint file '%s'\n",
331 filename);
332}
333
334void
335PhysicalMemory::unserialize(Checkpoint *cp, const string §ion)
336{
337 gzFile compressedMem;
338 long *tempPage;
339 long *pmem_current;
340 uint64_t curSize;
341 uint32_t bytesRead;
342 const int chunkSize = 16384;
343
344
345 string filename;
346
347 UNSERIALIZE_SCALAR(filename);
348
349 filename = cp->cptDir + "/" + filename;
350
351 // mmap memoryfile
352 int fd = open(filename.c_str(), O_RDONLY);
353 if (fd < 0) {
354 perror("open");
355 fatal("Can't open physical memory checkpoint file '%s'", filename);
356 }
357
358 compressedMem = gzdopen(fd, "rb");
359 if (compressedMem == NULL)
360 fatal("Insufficient memory to allocate compression state for %s\n",
361 filename);
362
363 // unmap file that was mmaped in the constructor
364 // This is done here to make sure that gzip and open don't muck with our
365 // nice large space of memory before we reallocate it
366 munmap(pmemAddr, params()->addrRange.size());
367
368 pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE,
369 MAP_ANON | MAP_PRIVATE, -1, 0);
370
371 if (pmemAddr == (void *)MAP_FAILED) {
372 perror("mmap");
373 fatal("Could not mmap physical memory!\n");
374 }
375
376 curSize = 0;
377 tempPage = (long*)malloc(chunkSize);
378 if (tempPage == NULL)
379 fatal("Unable to malloc memory to read file %s\n", filename);
380
381 /* Only copy bytes that are non-zero, so we don't give the VM system hell */
382 while (curSize < params()->addrRange.size()) {
383 bytesRead = gzread(compressedMem, tempPage, chunkSize);
384 if (bytesRead != chunkSize && bytesRead != params()->addrRange.size() - curSize)
385 fatal("Read failed on physical memory checkpoint file '%s'"
386 " got %d bytes, expected %d or %d bytes\n",
387 filename, bytesRead, chunkSize, params()->addrRange.size()-curSize);
388
389 assert(bytesRead % sizeof(long) == 0);
390
391 for (int x = 0; x < bytesRead/sizeof(long); x++)
392 {
393 if (*(tempPage+x) != 0) {
394 pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long));
395 *pmem_current = *(tempPage+x);
396 }
397 }
398 curSize += bytesRead;
399 }
400
401 free(tempPage);
402
403 if (gzclose(compressedMem))
404 fatal("Close failed on physical memory checkpoint file '%s'\n",
405 filename);
406
407}
408
409
410BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
411
412 Param<string> file;
413 Param<Range<Addr> > range;
414 Param<Tick> latency;
415
416END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
417
418BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
419
420 INIT_PARAM_DFLT(file, "memory mapped file", ""),
421 INIT_PARAM(range, "Device Address Range"),
422 INIT_PARAM(latency, "Memory access latency")
423
424END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
425
426CREATE_SIM_OBJECT(PhysicalMemory)
427{
428 PhysicalMemory::Params *p = new PhysicalMemory::Params;
429 p->name = getInstanceName();
430 p->addrRange = range;
431 p->latency = latency;
432 return new PhysicalMemory(p);
433}
434
435REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory)
|