From 4e366780288ffb5d43cae054df45b07b61c1580e Mon Sep 17 00:00:00 2001 From: Ron Dreslinski Date: Fri, 3 Feb 2006 14:54:37 -0500 Subject: [PATCH] Adding some more things toward having cpu->mem test in place. Still need to work on compilation issues. mem/physical.cc: mem/physical.hh: Added a stripped down version of the physical memory object --HG-- extra : convert_revision : 26826fb316f4cac900ec648fa268f1d95bc960f1 --- mem/physical.cc | 304 ++++++++++++++++++++++++++++++++++++++++++++++++ mem/physical.hh | 90 ++++++++++++++ 2 files changed, 394 insertions(+) create mode 100644 mem/physical.cc create mode 100644 mem/physical.hh diff --git a/mem/physical.cc b/mem/physical.cc new file mode 100644 index 000000000..c45e12750 --- /dev/null +++ b/mem/physical.cc @@ -0,0 +1,304 @@ +/* + * Copyright (c) 2001-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include + + +#include "base/misc.hh" +#include "config/full_system.hh" +#if FULL_SYSTEM +#include "mem/functional/memory_control.hh" +#endif +#include "mem/functional/physical.hh" +#include "sim/host.hh" +#include "sim/builder.hh" +#include "targetarch/isa_traits.hh" + +using namespace std; + +#if FULL_SYSTEM +PhysicalMemory::PhysicalMemory(const string &n, Range range, + MemoryController *mmu, const std::string &fname) + : FunctionalMemory(n), base_addr(range.start), pmem_size(range.size()), + pmem_addr(NULL) +{ + if (pmem_size % TheISA::PageBytes != 0) + panic("Memory Size not divisible by page size\n"); + + mmu->add_child(this, range); + + int fd = -1; + + if (!fname.empty()) { + fd = open(fname.c_str(), O_RDWR | O_CREAT, 0644); + if (fd == -1) { + perror("open"); + fatal("Could not open physical memory file: %s\n", fname); + } + ftruncate(fd, pmem_size); + } + + int map_flags = (fd == -1) ? (MAP_ANON | MAP_PRIVATE) : MAP_SHARED; + pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, + map_flags, fd, 0); + + if (fd != -1) + close(fd); + + if (pmem_addr == (void *)MAP_FAILED) { + perror("mmap"); + fatal("Could not mmap!\n"); + } + + page_ptr = 0; +} +#endif + +PhysicalMemory::PhysicalMemory(const string &n) + : FunctionalMemory(n), base_addr(0), pmem_addr(NULL) +{ + // Hardcoded to 128 MB for now. + pmem_size = 1 << 27; + + if (pmem_size % TheISA::PageBytes != 0) + panic("Memory Size not divisible by page size\n"); + + int map_flags = MAP_ANON | MAP_PRIVATE; + pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, + map_flags, -1, 0); + + if (pmem_addr == (void *)MAP_FAILED) { + perror("mmap"); + fatal("Could not mmap!\n"); + } + + page_ptr = 0; +} + +PhysicalMemory::~PhysicalMemory() +{ + if (pmem_addr) + munmap(pmem_addr, pmem_size); +} + +Addr +PhysicalMemory::new_page() +{ + Addr return_addr = page_ptr << LogVMPageSize; + return_addr += base_addr; + + ++page_ptr; + return return_addr; +} + +// +// little helper for better prot_* error messages +// +void +PhysicalMemory::prot_access_error(Addr addr, int size, const string &func) +{ + panic("invalid physical memory access!\n" + "%s: %s(addr=%#x, size=%d) out of range (max=%#x)\n", + name(), func, addr, size, pmem_size - 1); +} + +void +PhysicalMemory::prot_read(Addr addr, uint8_t *p, int size) +{ + if (addr + size >= pmem_size) + prot_access_error(addr, size, "prot_read"); + + memcpy(p, pmem_addr + addr - base_addr, size); +} + +void +PhysicalMemory::prot_write(Addr addr, const uint8_t *p, int size) +{ + if (addr + size >= pmem_size) + prot_access_error(addr, size, "prot_write"); + + memcpy(pmem_addr + addr - base_addr, p, size); +} + +void +PhysicalMemory::prot_memset(Addr addr, uint8_t val, int size) +{ + if (addr + size >= pmem_size) + prot_access_error(addr, size, "prot_memset"); + + memset(pmem_addr + addr - base_addr, val, size); +} + +void +PhysicalMemory::serialize(ostream &os) +{ + gzFile compressedMem; + string filename = name() + ".physmem"; + + SERIALIZE_SCALAR(pmem_size); + SERIALIZE_SCALAR(filename); + + // write memory file + string thefile = Checkpoint::dir() + "/" + filename.c_str(); + int fd = creat(thefile.c_str(), 0664); + if (fd < 0) { + perror("creat"); + fatal("Can't open physical memory checkpoint file '%s'\n", filename); + } + + compressedMem = gzdopen(fd, "wb"); + if (compressedMem == NULL) + fatal("Insufficient memory to allocate compression state for %s\n", + filename); + + if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) { + fatal("Write failed on physical memory checkpoint file '%s'\n", + filename); + } + + if (gzclose(compressedMem)) + fatal("Close failed on physical memory checkpoint file '%s'\n", + filename); +} + +void +PhysicalMemory::unserialize(Checkpoint *cp, const string §ion) +{ + gzFile compressedMem; + long *tempPage; + long *pmem_current; + uint64_t curSize; + uint32_t bytesRead; + const int chunkSize = 16384; + + + // unmap file that was mmaped in the constructor + munmap(pmem_addr, pmem_size); + + string filename; + + UNSERIALIZE_SCALAR(pmem_size); + UNSERIALIZE_SCALAR(filename); + + filename = cp->cptDir + "/" + filename; + + // mmap memoryfile + int fd = open(filename.c_str(), O_RDONLY); + if (fd < 0) { + perror("open"); + fatal("Can't open physical memory checkpoint file '%s'", filename); + } + + compressedMem = gzdopen(fd, "rb"); + if (compressedMem == NULL) + fatal("Insufficient memory to allocate compression state for %s\n", + filename); + + + pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_PRIVATE, -1, 0); + + if (pmem_addr == (void *)MAP_FAILED) { + perror("mmap"); + fatal("Could not mmap physical memory!\n"); + } + + curSize = 0; + tempPage = (long*)malloc(chunkSize); + if (tempPage == NULL) + fatal("Unable to malloc memory to read file %s\n", filename); + + /* Only copy bytes that are non-zero, so we don't give the VM system hell */ + while (curSize < pmem_size) { + bytesRead = gzread(compressedMem, tempPage, chunkSize); + if (bytesRead != chunkSize && bytesRead != pmem_size - curSize) + fatal("Read failed on physical memory checkpoint file '%s'" + " got %d bytes, expected %d or %d bytes\n", + filename, bytesRead, chunkSize, pmem_size-curSize); + + assert(bytesRead % sizeof(long) == 0); + + for (int x = 0; x < bytesRead/sizeof(long); x++) + { + if (*(tempPage+x) != 0) { + pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long)); + *pmem_current = *(tempPage+x); + } + } + curSize += bytesRead; + } + + free(tempPage); + + if (gzclose(compressedMem)) + fatal("Close failed on physical memory checkpoint file '%s'\n", + filename); + +} + +BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) + + Param file; +#if FULL_SYSTEM + SimObjectParam mmu; +#endif + Param > range; + +END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory) + +BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) + + INIT_PARAM_DFLT(file, "memory mapped file", ""), +#if FULL_SYSTEM + INIT_PARAM(mmu, "Memory Controller"), +#endif + INIT_PARAM(range, "Device Address Range") + +END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory) + +CREATE_SIM_OBJECT(PhysicalMemory) +{ +#if FULL_SYSTEM + if (mmu) { + return new PhysicalMemory(getInstanceName(), range, mmu, file); + } +#endif + + return new PhysicalMemory(getInstanceName()); +} + +REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory) diff --git a/mem/physical.hh b/mem/physical.hh new file mode 100644 index 000000000..5410024e5 --- /dev/null +++ b/mem/physical.hh @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2001-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* @file + */ + +#ifndef __PHYSICAL_MEMORY_HH__ +#define __PHYSICAL_MEMORY_HH__ + +#include "base/range.hh" +#include "mem/memory.hh" + +// +// Functional model for a contiguous block of physical memory. (i.e. RAM) +// +class PhysicalMemory : public Memory +{ + private: + // prevent copying of a MainMemory object + PhysicalMemory(const PhysicalMemory &specmem); + const PhysicalMemory &operator=(const PhysicalMemory &specmem); + + protected: + Addr base_addr; + Addr pmem_size; + uint8_t *pmem_addr; + int page_ptr; + + public: + Addr new_page(); + uint64_t size() { return pmem_size; } + + public: + PhysicalMemory(const std::string &n); + virtual ~PhysicalMemory(); + + protected: + // error handling for prot_* functions + void prot_access_error(Addr addr, int size, const std::string &func); + + public: + + // Read/Write arbitrary amounts of data to simulated memory space + virtual void prot_read(Addr addr, uint8_t *p, int size); + virtual void prot_write(Addr addr, const uint8_t *p, int size); + virtual void prot_memset(Addr addr, uint8_t val, int size); + + // fast back-door memory access for vtophys(), remote gdb, etc. + uint64_t phys_read_qword(Addr addr) const; + + public: + virtual void serialize(std::ostream &os); + virtual void unserialize(Checkpoint *cp, const std::string §ion); +}; + +PhysicalMemory::phys_read_qword(Addr addr) const +{ + if (addr + sizeof(uint64_t) > pmem_size) + return 0; + + return *(uint64_t *)(pmem_addr + addr); +} + + +#endif //__PHYSICAL_MEMORY_HH__ -- 2.30.2