xref: /gem5/src/arch/x86/vtophys.cc

/*
 * Copyright (c) 2007 The Hewlett-Packard Development Company
 * All rights reserved.
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * 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: Gabe Black
 */

#include <string>

#include "arch/x86/pagetable_walker.hh"
#include "arch/x86/tlb.hh"
#include "arch/x86/vtophys.hh"
#include "base/trace.hh"
#include "config/full_system.hh"
#include "cpu/thread_context.hh"
#include "debug/VtoPhys.hh"
#include "sim/fault_fwd.hh"

using namespace std;

namespace X86ISA
{
    Addr
    vtophys(Addr vaddr)
    {
#if FULL_SYSTEM
        panic("Need access to page tables\n");
#endif
        return vaddr;
    }

    Addr
    vtophys(ThreadContext *tc, Addr vaddr)
    {
#if FULL_SYSTEM
        Walker *walker = tc->getDTBPtr()->getWalker();
        Addr size;
        Addr addr = vaddr;
        Fault fault = walker->startFunctional(tc, addr, size, BaseTLB::Read);
        if (fault != NoFault)
            panic("vtophys page walk returned fault\n");
        Addr masked_addr = vaddr & (size - 1);
        Addr paddr = addr | masked_addr;
        DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
        return paddr;
#endif
        return vaddr;
    }
}