vtophys.cc

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/*
 * 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
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * Authors: Gabe Black
 */

#include "arch/x86/vtophys.hh"

#include <string>

#include "arch/x86/pagetable_walker.hh"
#include "arch/x86/tlb.hh"
#include "base/trace.hh"
#include "cpu/thread_context.hh"
#include "debug/VtoPhys.hh"

using namespace std;

namespace X86ISA
{
    Addr
    vtophys(Addr vaddr)
    {
        panic("Need access to page tables\n");
    }

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