system.cc

M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作为模拟平台

/*
 * Copyright (c) 2002, 2003, 2004, 2005, 2006
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any
 * purpose, so long as the copyright notice above, this grant of
 * permission, and the disclaimer below appear in all copies made; and
 * so long as the name of The University of Michigan is not used in
 * any advertising or publicity pertaining to the use or distribution
 * of this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND
 * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE
 * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGES.
 *
 * Authors: Ali G. Saidi
 */

#include "arch/sparc/system.hh"
#include "arch/vtophys.hh"
#include "base/remote_gdb.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "base/trace.hh"
#include "mem/physical.hh"
#include "params/SparcSystem.hh"
#include "sim/byteswap.hh"


using namespace BigEndianGuest;

SparcSystem::SparcSystem(Params *p)
    : System(p), sysTick(0),funcRomPort(p->name + "-fromport"),
    funcNvramPort(p->name + "-fnvramport"),
    funcHypDescPort(p->name + "-fhypdescport"),
    funcPartDescPort(p->name + "-fpartdescport")
{
    resetSymtab = new SymbolTable;
    hypervisorSymtab = new SymbolTable;
    openbootSymtab = new SymbolTable;
    nvramSymtab = new SymbolTable;
    hypervisorDescSymtab = new SymbolTable;
    partitionDescSymtab = new SymbolTable;

    Port *rom_port;
    rom_port = params()->rom->getPort("functional");
    funcRomPort.setPeer(rom_port);
    rom_port->setPeer(&funcRomPort);

    rom_port = params()->nvram->getPort("functional");
    funcNvramPort.setPeer(rom_port);
    rom_port->setPeer(&funcNvramPort);

    rom_port = params()->hypervisor_desc->getPort("functional");
    funcHypDescPort.setPeer(rom_port);
    rom_port->setPeer(&funcHypDescPort);

    rom_port = params()->partition_desc->getPort("functional");
    funcPartDescPort.setPeer(rom_port);
    rom_port->setPeer(&funcPartDescPort);

    /**
     * Load the boot code, and hypervisor into memory.
     */
    // Read the reset binary
    reset = createObjectFile(params()->reset_bin, true);
    if (reset == NULL)
        fatal("Could not load reset binary %s", params()->reset_bin);

    // Read the openboot binary
    openboot = createObjectFile(params()->openboot_bin, true);
    if (openboot == NULL)
        fatal("Could not load openboot bianry %s", params()->openboot_bin);

    // Read the hypervisor binary
    hypervisor = createObjectFile(params()->hypervisor_bin, true);
    if (hypervisor == NULL)
        fatal("Could not load hypervisor binary %s", params()->hypervisor_bin);

    // Read the nvram image
    nvram = createObjectFile(params()->nvram_bin, true);
    if (nvram == NULL)
        fatal("Could not load nvram image %s", params()->nvram_bin);

    // Read the hypervisor description image
    hypervisor_desc = createObjectFile(params()->hypervisor_desc_bin, true);
    if (hypervisor_desc == NULL)
        fatal("Could not load hypervisor description image %s",
                params()->hypervisor_desc_bin);

    // Read the partition description image
    partition_desc = createObjectFile(params()->partition_desc_bin, true);
    if (partition_desc == NULL)
        fatal("Could not load partition description image %s",
                params()->partition_desc_bin);


    // Load reset binary into memory
    reset->setTextBase(params()->reset_addr);
    reset->loadSections(&funcRomPort);
    // Load the openboot binary
    openboot->setTextBase(params()->openboot_addr);
    openboot->loadSections(&funcRomPort);
    // Load the hypervisor binary
    hypervisor->setTextBase(params()->hypervisor_addr);
    hypervisor->loadSections(&funcRomPort);
    // Load the nvram image
    nvram->setTextBase(params()->nvram_addr);
    nvram->loadSections(&funcNvramPort);
    // Load the hypervisor description image
    hypervisor_desc->setTextBase(params()->hypervisor_desc_addr);
    hypervisor_desc->loadSections(&funcHypDescPort);
    // Load the partition description image
    partition_desc->setTextBase(params()->partition_desc_addr);
    partition_desc->loadSections(&funcPartDescPort);

    // load symbols
    if (!reset->loadGlobalSymbols(resetSymtab))
        panic("could not load reset symbols\n");

    if (!openboot->loadGlobalSymbols(openbootSymtab))
        panic("could not load openboot symbols\n");

    if (!hypervisor->loadLocalSymbols(hypervisorSymtab))
        panic("could not load hypervisor symbols\n");

    if (!nvram->loadLocalSymbols(nvramSymtab))
        panic("could not load nvram symbols\n");

    if (!hypervisor_desc->loadLocalSymbols(hypervisorDescSymtab))
        panic("could not load hypervisor description symbols\n");

    if (!partition_desc->loadLocalSymbols(partitionDescSymtab))
        panic("could not load partition description symbols\n");

    // load symbols into debug table
    if (!reset->loadGlobalSymbols(debugSymbolTable))
        panic("could not load reset symbols\n");

    if (!openboot->loadGlobalSymbols(debugSymbolTable))
        panic("could not load openboot symbols\n");

    if (!hypervisor->loadLocalSymbols(debugSymbolTable))
        panic("could not load hypervisor symbols\n");

    // Strip off the rom address so when the hypervisor is copied into memory we
    // have symbols still
    if (!hypervisor->loadLocalSymbols(debugSymbolTable, 0xFFFFFF))
        panic("could not load hypervisor symbols\n");

    if (!nvram->loadGlobalSymbols(debugSymbolTable))
        panic("could not load reset symbols\n");

    if (!hypervisor_desc->loadGlobalSymbols(debugSymbolTable))
        panic("could not load hypervisor description symbols\n");

    if (!partition_desc->loadLocalSymbols(debugSymbolTable))
        panic("could not load partition description symbols\n");


    // @todo any fixup code over writing data in binaries on setting break
    // events on functions should happen here.

}

SparcSystem::~SparcSystem()
{
    delete resetSymtab;
    delete hypervisorSymtab;
    delete openbootSymtab;
    delete nvramSymtab;
    delete hypervisorDescSymtab;
    delete partitionDescSymtab;
    delete reset;
    delete openboot;
    delete hypervisor;
    delete nvram;
    delete hypervisor_desc;
    delete partition_desc;
}

void
SparcSystem::serialize(std::ostream &os)
{
    System::serialize(os);
    resetSymtab->serialize("reset_symtab", os);
    hypervisorSymtab->serialize("hypervisor_symtab", os);
    openbootSymtab->serialize("openboot_symtab", os);
    nvramSymtab->serialize("nvram_symtab", os);
    hypervisorDescSymtab->serialize("hypervisor_desc_symtab", os);
    partitionDescSymtab->serialize("partition_desc_symtab", os);
}


void
SparcSystem::unserialize(Checkpoint *cp, const std::string &section)
{
    System::unserialize(cp,section);
    resetSymtab->unserialize("reset_symtab", cp, section);
    hypervisorSymtab->unserialize("hypervisor_symtab", cp, section);
    openbootSymtab->unserialize("openboot_symtab", cp, section);
    nvramSymtab->unserialize("nvram_symtab", cp, section);
    hypervisorDescSymtab->unserialize("hypervisor_desc_symtab", cp, section);
    partitionDescSymtab->unserialize("partition_desc_symtab", cp, section);
}

SparcSystem *
SparcSystemParams::create()
{
    return new SparcSystem(this);
}