/*
 * Copyright (c) 2007-2008 The Hewlett-Packard Development Company
 * All rights reserved.
 *
 * Redistribution and use of this software in source and binary forms,
 * with or without modification, are permitted provided that the
 * following conditions are met:
 *
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 * use which is NOT directed to receiving any direct monetary
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 * If you wish to use this software or functionality therein that may be
 * covered by patents for commercial use, please contact:
 *     Director of Intellectual Property Licensing
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 *     Hewlett-Packard Company
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 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.  Redistributions
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 * this software without specific prior written permission.  No right of
 * sublicense is granted herewith.  Derivatives of the software and
 * output created using the software may be prepared, but only for
 * Non-Commercial Uses.  Derivatives of the software may be shared with
 * others provided: (i) the others agree to abide by the list of
 * conditions herein which includes the Non-Commercial Use restrictions;
 * and (ii) such Derivatives of the software include the above copyright
 * notice to acknowledge the contribution from this software where
 * applicable, this list of conditions and the disclaimer below.
 *
 * 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Gabe Black
 */

#ifndef __ARCH_X86_MMAPEDIPR_HH__
#define __ARCH_X86_MMAPEDIPR_HH__

/**
 * @file
 *
 * ISA-specific helper functions for memory mapped IPR accesses.
 */

#include "arch/x86/miscregs.hh"
#include "config/full_system.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "mem/packet.hh"

namespace X86ISA
{
    inline Tick
    handleIprRead(ThreadContext *xc, Packet *pkt)
    {
#if !FULL_SYSTEM
        panic("Shouldn't have a memory mapped register in SE\n");
#else
        Addr offset = pkt->getAddr() & mask(3);
        MiscRegIndex index = (MiscRegIndex)(pkt->getAddr() / sizeof(MiscReg));
        MiscReg data = htog(xc->readMiscReg(index));
        // Make sure we don't trot off the end of data.
        assert(offset + pkt->getSize() <= sizeof(MiscReg));
        pkt->setData(((uint8_t *)&data) + offset);
#endif
        return xc->getCpuPtr()->ticks(1);
    }

    inline Tick
    handleIprWrite(ThreadContext *xc, Packet *pkt)
    {
#if !FULL_SYSTEM
        panic("Shouldn't have a memory mapped register in SE\n");
#else
        Addr offset = pkt->getAddr() & mask(3);
        MiscRegIndex index = (MiscRegIndex)(pkt->getAddr() / sizeof(MiscReg));
        MiscReg data = htog(xc->readMiscRegNoEffect(index));
        // Make sure we don't trot off the end of data.
        assert(offset + pkt->getSize() <= sizeof(MiscReg));
        pkt->writeData(((uint8_t *)&data) + offset);
        xc->setMiscReg(index, gtoh(data));
#endif
        return xc->getCpuPtr()->ticks(1);
    }
};

#endif // __ARCH_X86_MMAPEDIPR_HH__