physical.cc (4870:fcc39d001154) physical.cc (4918:3214e3694fb2)
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;

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39#include <iostream>
40#include <string>
41
42#include "arch/isa_traits.hh"
43#include "base/misc.hh"
44#include "config/full_system.hh"
45#include "mem/packet_access.hh"
46#include "mem/physical.hh"
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;

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39#include <iostream>
40#include <string>
41
42#include "arch/isa_traits.hh"
43#include "base/misc.hh"
44#include "config/full_system.hh"
45#include "mem/packet_access.hh"
46#include "mem/physical.hh"
47#include "sim/builder.hh"
48#include "sim/eventq.hh"
49#include "sim/host.hh"
50
51using namespace std;
52using namespace TheISA;
53
47#include "sim/eventq.hh"
48#include "sim/host.hh"
49
50using namespace std;
51using namespace TheISA;
52
54PhysicalMemory::PhysicalMemory(Params *p)
55 : MemObject(p->name), pmemAddr(NULL), lat(p->latency), _params(p)
53PhysicalMemory::PhysicalMemory(const Params *p)
54 : MemObject(p), pmemAddr(NULL), lat(p->latency)
56{
55{
57 if (params()->addrRange.size() % TheISA::PageBytes != 0)
56 if (params()->range.size() % TheISA::PageBytes != 0)
58 panic("Memory Size not divisible by page size\n");
59
60 int map_flags = MAP_ANON | MAP_PRIVATE;
57 panic("Memory Size not divisible by page size\n");
58
59 int map_flags = MAP_ANON | MAP_PRIVATE;
61 pmemAddr =
62 (uint8_t *)mmap(NULL, params()->addrRange.size(),
63 PROT_READ | PROT_WRITE, map_flags, -1, 0);
60 pmemAddr = (uint8_t *)mmap(NULL, params()->range.size(),
61 PROT_READ | PROT_WRITE, map_flags, -1, 0);
64
65 if (pmemAddr == (void *)MAP_FAILED) {
66 perror("mmap");
67 fatal("Could not mmap!\n");
68 }
69
70 //If requested, initialize all the memory to 0
62
63 if (pmemAddr == (void *)MAP_FAILED) {
64 perror("mmap");
65 fatal("Could not mmap!\n");
66 }
67
68 //If requested, initialize all the memory to 0
71 if(params()->zero)
72 memset(pmemAddr, 0, params()->addrRange.size());
69 if (p->zero)
70 memset(pmemAddr, 0, p->range.size());
73
74 pagePtr = 0;
75}
76
77void
78PhysicalMemory::init()
79{
80 if (ports.size() == 0) {

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85 if (*pi)
86 (*pi)->sendStatusChange(Port::RangeChange);
87 }
88}
89
90PhysicalMemory::~PhysicalMemory()
91{
92 if (pmemAddr)
71
72 pagePtr = 0;
73}
74
75void
76PhysicalMemory::init()
77{
78 if (ports.size() == 0) {

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83 if (*pi)
84 (*pi)->sendStatusChange(Port::RangeChange);
85 }
86}
87
88PhysicalMemory::~PhysicalMemory()
89{
90 if (pmemAddr)
93 munmap((char*)pmemAddr, params()->addrRange.size());
91 munmap((char*)pmemAddr, params()->range.size());
94 //Remove memPorts?
95}
96
97Addr
98PhysicalMemory::new_page()
99{
100 Addr return_addr = pagePtr << LogVMPageSize;
101 return_addr += start();

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379 memory->getAddressRanges(resp, snoop);
380}
381
382void
383PhysicalMemory::getAddressRanges(AddrRangeList &resp, bool &snoop)
384{
385 snoop = false;
386 resp.clear();
92 //Remove memPorts?
93}
94
95Addr
96PhysicalMemory::new_page()
97{
98 Addr return_addr = pagePtr << LogVMPageSize;
99 return_addr += start();

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377 memory->getAddressRanges(resp, snoop);
378}
379
380void
381PhysicalMemory::getAddressRanges(AddrRangeList &resp, bool &snoop)
382{
383 snoop = false;
384 resp.clear();
387 resp.push_back(RangeSize(start(), params()->addrRange.size()));
385 resp.push_back(RangeSize(start(), params()->range.size()));
388}
389
390int
391PhysicalMemory::MemoryPort::deviceBlockSize()
392{
393 return memory->deviceBlockSize();
394}
395

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441 fatal("Can't open physical memory checkpoint file '%s'\n", filename);
442 }
443
444 compressedMem = gzdopen(fd, "wb");
445 if (compressedMem == NULL)
446 fatal("Insufficient memory to allocate compression state for %s\n",
447 filename);
448
386}
387
388int
389PhysicalMemory::MemoryPort::deviceBlockSize()
390{
391 return memory->deviceBlockSize();
392}
393

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439 fatal("Can't open physical memory checkpoint file '%s'\n", filename);
440 }
441
442 compressedMem = gzdopen(fd, "wb");
443 if (compressedMem == NULL)
444 fatal("Insufficient memory to allocate compression state for %s\n",
445 filename);
446
449 if (gzwrite(compressedMem, pmemAddr, params()->addrRange.size()) != params()->addrRange.size()) {
447 if (gzwrite(compressedMem, pmemAddr, params()->range.size()) !=
448 params()->range.size()) {
450 fatal("Write failed on physical memory checkpoint file '%s'\n",
451 filename);
452 }
453
454 if (gzclose(compressedMem))
455 fatal("Close failed on physical memory checkpoint file '%s'\n",
456 filename);
457}

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483 compressedMem = gzdopen(fd, "rb");
484 if (compressedMem == NULL)
485 fatal("Insufficient memory to allocate compression state for %s\n",
486 filename);
487
488 // unmap file that was mmaped in the constructor
489 // This is done here to make sure that gzip and open don't muck with our
490 // nice large space of memory before we reallocate it
449 fatal("Write failed on physical memory checkpoint file '%s'\n",
450 filename);
451 }
452
453 if (gzclose(compressedMem))
454 fatal("Close failed on physical memory checkpoint file '%s'\n",
455 filename);
456}

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482 compressedMem = gzdopen(fd, "rb");
483 if (compressedMem == NULL)
484 fatal("Insufficient memory to allocate compression state for %s\n",
485 filename);
486
487 // unmap file that was mmaped in the constructor
488 // This is done here to make sure that gzip and open don't muck with our
489 // nice large space of memory before we reallocate it
491 munmap((char*)pmemAddr, params()->addrRange.size());
490 munmap((char*)pmemAddr, params()->range.size());
492
491
493 pmemAddr = (uint8_t *)mmap(NULL, params()->addrRange.size(), PROT_READ | PROT_WRITE,
494 MAP_ANON | MAP_PRIVATE, -1, 0);
492 pmemAddr = (uint8_t *)mmap(NULL, params()->range.size(),
493 PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
495
496 if (pmemAddr == (void *)MAP_FAILED) {
497 perror("mmap");
498 fatal("Could not mmap physical memory!\n");
499 }
500
501 curSize = 0;
502 tempPage = (long*)malloc(chunkSize);
503 if (tempPage == NULL)
504 fatal("Unable to malloc memory to read file %s\n", filename);
505
506 /* Only copy bytes that are non-zero, so we don't give the VM system hell */
494
495 if (pmemAddr == (void *)MAP_FAILED) {
496 perror("mmap");
497 fatal("Could not mmap physical memory!\n");
498 }
499
500 curSize = 0;
501 tempPage = (long*)malloc(chunkSize);
502 if (tempPage == NULL)
503 fatal("Unable to malloc memory to read file %s\n", filename);
504
505 /* Only copy bytes that are non-zero, so we don't give the VM system hell */
507 while (curSize < params()->addrRange.size()) {
506 while (curSize < params()->range.size()) {
508 bytesRead = gzread(compressedMem, tempPage, chunkSize);
507 bytesRead = gzread(compressedMem, tempPage, chunkSize);
509 if (bytesRead != chunkSize && bytesRead != params()->addrRange.size() - curSize)
508 if (bytesRead != chunkSize &&
509 bytesRead != params()->range.size() - curSize)
510 fatal("Read failed on physical memory checkpoint file '%s'"
511 " got %d bytes, expected %d or %d bytes\n",
510 fatal("Read failed on physical memory checkpoint file '%s'"
511 " got %d bytes, expected %d or %d bytes\n",
512 filename, bytesRead, chunkSize, params()->addrRange.size()-curSize);
512 filename, bytesRead, chunkSize,
513 params()->range.size() - curSize);
513
514 assert(bytesRead % sizeof(long) == 0);
515
516 for (int x = 0; x < bytesRead/sizeof(long); x++)
517 {
518 if (*(tempPage+x) != 0) {
519 pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long));
520 *pmem_current = *(tempPage+x);

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526 free(tempPage);
527
528 if (gzclose(compressedMem))
529 fatal("Close failed on physical memory checkpoint file '%s'\n",
530 filename);
531
532}
533
514
515 assert(bytesRead % sizeof(long) == 0);
516
517 for (int x = 0; x < bytesRead/sizeof(long); x++)
518 {
519 if (*(tempPage+x) != 0) {
520 pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long));
521 *pmem_current = *(tempPage+x);

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527 free(tempPage);
528
529 if (gzclose(compressedMem))
530 fatal("Close failed on physical memory checkpoint file '%s'\n",
531 filename);
532
533}
534
534
535BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
536
537 Param<string> file;
538 Param<Range<Addr> > range;
539 Param<Tick> latency;
540 Param<bool> zero;
541
542END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
543
544BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
545
546 INIT_PARAM_DFLT(file, "memory mapped file", ""),
547 INIT_PARAM(range, "Device Address Range"),
548 INIT_PARAM(latency, "Memory access latency"),
549 INIT_PARAM(zero, "Zero initialize memory")
550
551END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
552
553CREATE_SIM_OBJECT(PhysicalMemory)
535PhysicalMemory *
536PhysicalMemoryParams::create()
554{
537{
555 PhysicalMemory::Params *p = new PhysicalMemory::Params;
556 p->name = getInstanceName();
557 p->addrRange = range;
558 p->latency = latency;
559 p->zero = zero;
560 return new PhysicalMemory(p);
538 return new PhysicalMemory(this);
561}
539}
562
563REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory)