system.cc

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/*
 * Copyright (c) 2002-2005 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.
 *
 * Authors: Ali Saidi
 *          Nathan Binkert
 */

#include "arch/alpha/system.hh"

#include <sys/signal.h>

#include "arch/alpha/ev5.hh"
#include "arch/alpha/faults.hh"
#include "arch/vtophys.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "base/trace.hh"
#include "debug/Loader.hh"
#include "mem/fs_translating_port_proxy.hh"
#include "params/AlphaSystem.hh"
#include "sim/byteswap.hh"

using namespace AlphaISA;

AlphaSystem::AlphaSystem(Params *p)
    : System(p), intrFreq(0), virtProxy(getSystemPort(), p->cache_line_size)
{
    consoleSymtab = new SymbolTable;
    palSymtab = new SymbolTable;


    // Load Console Code
    console = createObjectFile(params()->console);
    if (console == NULL)
        fatal("Could not load console file %s", params()->console);

    // Load pal file
    pal = createObjectFile(params()->pal);
    if (pal == NULL)
        fatal("Could not load PALcode file %s", params()->pal);

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

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

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

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

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

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


}

AlphaSystem::~AlphaSystem()
{
    delete consoleSymtab;
    delete console;
    delete pal;
#ifdef DEBUG
    delete consolePanicEvent;
#endif
}

void
AlphaSystem::initState()
{
     Addr addr = 0;

    // Moved from the constructor to here since it relies on the
    // address map being resolved in the interconnect

    // Call the initialisation of the super class
    System::initState();

    for (auto *tc: threadContexts) {
        int cpuId = tc->contextId();
        initIPRs(tc, cpuId);

        tc->setIntReg(16, cpuId);
        tc->setIntReg(0, cpuId);

        Addr base = tc->readMiscRegNoEffect(IPR_PAL_BASE);
        Addr offset = ResetFault().vect();

        tc->pcState(base + offset);

        tc->activate();
    }

    // Load program sections into memory
    pal->buildImage().mask(loadAddrMask).write(physProxy);
    console->buildImage().mask(loadAddrMask).write(physProxy);

    if (consoleSymtab->findAddress("env_booted_osflags", addr)) {
        virtProxy.writeBlob(addr, params()->boot_osflags.c_str(),
                            strlen(params()->boot_osflags.c_str()));
    }

    if (consoleSymtab->findAddress("m5_rpb", addr)) {
        uint64_t data;
        data = htole(params()->system_type);
        virtProxy.write(addr+0x50, data);
        data = htole(params()->system_rev);
        virtProxy.write(addr+0x58, data);
    } else
        panic("could not find hwrpb\n");
}

void
AlphaSystem::startup()
{
    // Setup all the function events now that we have a system and a symbol
    // table
    setupFuncEvents();
}

void
AlphaSystem::setupFuncEvents()
{
#ifndef NDEBUG
    consolePanicEvent = addConsoleFuncEvent<BreakPCEvent>("panic");
#endif
}

Addr
AlphaSystem::fixFuncEventAddr(Addr addr)
{
    // mask for just the opcode, Ra, and Rb fields (not the offset)
    const uint32_t inst_mask = 0xffff0000;
    // ldah gp,X(pv): opcode 9, Ra = 29, Rb = 27
    const uint32_t gp_ldah_pattern = (9 << 26) | (29 << 21) | (27 << 16);
    // lda  gp,Y(gp): opcode 8, Ra = 29, rb = 29
    const uint32_t gp_lda_pattern  = (8 << 26) | (29 << 21) | (29 << 16);

    uint32_t i1 = virtProxy.read<uint32_t>(addr);
    uint32_t i2 = virtProxy.read<uint32_t>(addr + sizeof(MachInst));

    if ((i1 & inst_mask) == gp_ldah_pattern &&
        (i2 & inst_mask) == gp_lda_pattern) {
        Addr new_addr = addr + 2 * sizeof(MachInst);
        DPRINTF(Loader, "fixFuncEventAddr: %p -> %p", addr, new_addr);
        return new_addr;
    } else {
        return addr;
    }
}

void
AlphaSystem::setAlphaAccess(Addr access)
{
    Addr addr = 0;
    if (consoleSymtab->findAddress("m5AlphaAccess", addr)) {
        virtProxy.write(addr, htole(Phys2K0Seg(access)));
    } else {
        panic("could not find m5AlphaAccess\n");
    }
}

void
AlphaSystem::serializeSymtab(CheckpointOut &cp) const
{
    consoleSymtab->serialize("console_symtab", cp);
    palSymtab->serialize("pal_symtab", cp);
}

void
AlphaSystem::unserializeSymtab(CheckpointIn &cp)
{
    consoleSymtab->unserialize("console_symtab", cp);
    palSymtab->unserialize("pal_symtab", cp);
}

AlphaSystem *
AlphaSystemParams::create()
{
    return new AlphaSystem(this);
}