Ignoring returned latency for now. Refactored loadSections in ObjectFile hierarchy. base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.hh: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. base/loader/object_file.cc: Have each section record a pointer to image data. This allows us to move common loadSections code into ObjectFile. Also explicitly load BSS now since we need to allocate the translations for it in syscall emulation. cpu/base.hh: Don't need memPort (just pass port in to ExecContext constructor). cpu/exec_context.cc: cpu/exec_context.hh: mem/port.cc: mem/translating_port.cc: mem/translating_port.hh: Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.cc: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Several more minor bug fixes. Works for simple program with SIMPLE_CPU_MEM_IMMEDIATE model now. Probably have memory leaks with SIMPLE_CPU_MEM_TIMING (if it works at all). Pass syscall emulation Port into constructor instead of getting it from BaseCPU. cpu/simple/cpu.hh: Explicitly choose one of three timing models. Statically allocate request and packet objects when possible. Pass syscall emulation Port into constructor instead of getting it from BaseCPU. mem/physical.cc: Set packet result field. --HG-- extra : convert_revision : 359d0ebe4b4665867f4e26e7394ec0f1d17cfc26
379 lines
9.5 KiB
C++
379 lines
9.5 KiB
C++
/*
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* Copyright (c) 2001-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <zlib.h>
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#include <cstdio>
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#include <iostream>
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#include <string>
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#include "base/misc.hh"
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#include "config/full_system.hh"
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#include "mem/physical.hh"
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#include "sim/host.hh"
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#include "sim/builder.hh"
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#include "sim/eventq.hh"
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#include "targetarch/isa_traits.hh"
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using namespace std;
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PhysicalMemory::MemResponseEvent::MemResponseEvent(Packet &pkt, MemoryPort* _m)
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: Event(&mainEventQueue, CPU_Tick_Pri), pkt(pkt), memoryPort(_m)
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{
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this->setFlags(AutoDelete);
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}
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void
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PhysicalMemory::MemResponseEvent::process()
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{
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memoryPort->sendTiming(pkt);
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}
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const char *
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PhysicalMemory::MemResponseEvent::description()
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{
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return "Physical Memory Timing Access respnse event";
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}
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PhysicalMemory::PhysicalMemory(const string &n)
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: Memory(n), base_addr(0), pmem_addr(NULL)
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{
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// Hardcoded to 128 MB for now.
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pmem_size = 1 << 27;
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if (pmem_size % TheISA::PageBytes != 0)
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panic("Memory Size not divisible by page size\n");
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int map_flags = MAP_ANON | MAP_PRIVATE;
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pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE,
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map_flags, -1, 0);
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if (pmem_addr == (void *)MAP_FAILED) {
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perror("mmap");
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fatal("Could not mmap!\n");
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}
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page_ptr = 0;
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}
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PhysicalMemory::~PhysicalMemory()
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{
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if (pmem_addr)
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munmap(pmem_addr, pmem_size);
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//Remove memPorts?
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}
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Addr
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PhysicalMemory::new_page()
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{
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Addr return_addr = page_ptr << LogVMPageSize;
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return_addr += base_addr;
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++page_ptr;
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return return_addr;
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}
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Port *
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PhysicalMemory::addPort(std::string portName)
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{
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memoryPortList[portName] = new MemoryPort(this);
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return memoryPortList[portName];
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}
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//
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// little helper for better prot_* error messages
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//
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void
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PhysicalMemory::prot_access_error(Addr addr, int size, Command func)
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{
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panic("invalid physical memory access!\n"
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"%s: %i(addr=%#x, size=%d) out of range (max=%#x)\n",
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name(), func, addr, size, pmem_size - 1);
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}
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void
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PhysicalMemory::prot_memset(Addr addr, uint8_t val, int size)
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{
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if (addr + size >= pmem_size)
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prot_access_error(addr, size, Write);
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memset(pmem_addr + addr - base_addr, val, size);
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}
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int
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PhysicalMemory::deviceBlockSize()
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{
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//Can accept anysize request
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return 0;
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}
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bool
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PhysicalMemory::doTimingAccess (Packet &pkt, MemoryPort* memoryPort)
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{
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doFunctionalAccess(pkt);
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MemResponseEvent* response = new MemResponseEvent(pkt, memoryPort);
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response->schedule(curTick + lat);
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return true;
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}
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Tick
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PhysicalMemory::doAtomicAccess(Packet &pkt)
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{
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doFunctionalAccess(pkt);
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return curTick + lat;
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}
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void
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PhysicalMemory::doFunctionalAccess(Packet &pkt)
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{
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if (pkt.addr + pkt.size >= pmem_size)
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prot_access_error(pkt.addr, pkt.size, pkt.cmd);
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switch (pkt.cmd) {
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case Read:
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memcpy(pkt.data, pmem_addr + pkt.addr - base_addr, pkt.size);
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break;
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case Write:
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memcpy(pmem_addr + pkt.addr - base_addr, pkt.data, pkt.size);
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break;
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default:
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panic("unimplemented");
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}
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pkt.result = Success;
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}
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Port *
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PhysicalMemory::getPort(const char *if_name)
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{
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if (memoryPortList.find(if_name) != memoryPortList.end())
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return memoryPortList[if_name];
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else
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panic("Looking for a port that didn't exist\n");
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}
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void
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PhysicalMemory::recvStatusChange(Port::Status status)
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{
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panic("??");
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}
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PhysicalMemory::MemoryPort::MemoryPort(PhysicalMemory *_memory)
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: memory(_memory)
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{ }
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void
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PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status)
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{
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memory->recvStatusChange(status);
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}
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void
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PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &range_list,
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bool &owner)
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{
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panic("??");
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}
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int
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PhysicalMemory::MemoryPort::deviceBlockSize()
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{
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return memory->deviceBlockSize();
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}
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bool
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PhysicalMemory::MemoryPort::recvTiming(Packet &pkt)
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{
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return memory->doTimingAccess(pkt, this);
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}
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Tick
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PhysicalMemory::MemoryPort::recvAtomic(Packet &pkt)
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{
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return memory->doAtomicAccess(pkt);
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}
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void
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PhysicalMemory::MemoryPort::recvFunctional(Packet &pkt)
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{
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memory->doFunctionalAccess(pkt);
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}
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void
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PhysicalMemory::serialize(ostream &os)
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{
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gzFile compressedMem;
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string filename = name() + ".physmem";
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SERIALIZE_SCALAR(pmem_size);
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SERIALIZE_SCALAR(filename);
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// write memory file
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string thefile = Checkpoint::dir() + "/" + filename.c_str();
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int fd = creat(thefile.c_str(), 0664);
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if (fd < 0) {
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perror("creat");
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fatal("Can't open physical memory checkpoint file '%s'\n", filename);
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}
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compressedMem = gzdopen(fd, "wb");
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if (compressedMem == NULL)
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fatal("Insufficient memory to allocate compression state for %s\n",
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filename);
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if (gzwrite(compressedMem, pmem_addr, pmem_size) != pmem_size) {
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fatal("Write failed on physical memory checkpoint file '%s'\n",
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filename);
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}
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if (gzclose(compressedMem))
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fatal("Close failed on physical memory checkpoint file '%s'\n",
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filename);
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}
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void
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PhysicalMemory::unserialize(Checkpoint *cp, const string §ion)
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{
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gzFile compressedMem;
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long *tempPage;
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long *pmem_current;
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uint64_t curSize;
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uint32_t bytesRead;
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const int chunkSize = 16384;
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// unmap file that was mmaped in the constructor
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munmap(pmem_addr, pmem_size);
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string filename;
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UNSERIALIZE_SCALAR(pmem_size);
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UNSERIALIZE_SCALAR(filename);
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filename = cp->cptDir + "/" + filename;
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// mmap memoryfile
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int fd = open(filename.c_str(), O_RDONLY);
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if (fd < 0) {
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perror("open");
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fatal("Can't open physical memory checkpoint file '%s'", filename);
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}
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compressedMem = gzdopen(fd, "rb");
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if (compressedMem == NULL)
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fatal("Insufficient memory to allocate compression state for %s\n",
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filename);
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pmem_addr = (uint8_t *)mmap(NULL, pmem_size, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_PRIVATE, -1, 0);
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if (pmem_addr == (void *)MAP_FAILED) {
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perror("mmap");
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fatal("Could not mmap physical memory!\n");
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}
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curSize = 0;
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tempPage = (long*)malloc(chunkSize);
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if (tempPage == NULL)
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fatal("Unable to malloc memory to read file %s\n", filename);
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/* Only copy bytes that are non-zero, so we don't give the VM system hell */
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while (curSize < pmem_size) {
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bytesRead = gzread(compressedMem, tempPage, chunkSize);
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if (bytesRead != chunkSize && bytesRead != pmem_size - curSize)
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fatal("Read failed on physical memory checkpoint file '%s'"
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" got %d bytes, expected %d or %d bytes\n",
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filename, bytesRead, chunkSize, pmem_size-curSize);
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assert(bytesRead % sizeof(long) == 0);
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for (int x = 0; x < bytesRead/sizeof(long); x++)
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{
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if (*(tempPage+x) != 0) {
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pmem_current = (long*)(pmem_addr + curSize + x * sizeof(long));
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*pmem_current = *(tempPage+x);
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}
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}
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curSize += bytesRead;
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}
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free(tempPage);
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if (gzclose(compressedMem))
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fatal("Close failed on physical memory checkpoint file '%s'\n",
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filename);
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}
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BEGIN_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
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Param<string> file;
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#if FULL_SYSTEM
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SimObjectParam<MemoryController *> mmu;
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#endif
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Param<Range<Addr> > range;
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END_DECLARE_SIM_OBJECT_PARAMS(PhysicalMemory)
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BEGIN_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
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INIT_PARAM_DFLT(file, "memory mapped file", ""),
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#if FULL_SYSTEM
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INIT_PARAM(mmu, "Memory Controller"),
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#endif
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INIT_PARAM(range, "Device Address Range")
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END_INIT_SIM_OBJECT_PARAMS(PhysicalMemory)
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CREATE_SIM_OBJECT(PhysicalMemory)
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{
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#if FULL_SYSTEM
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if (mmu) {
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return new PhysicalMemory(getInstanceName(), range, mmu, file);
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}
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#endif
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return new PhysicalMemory(getInstanceName());
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}
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REGISTER_SIM_OBJECT("PhysicalMemory", PhysicalMemory)
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