mmapped_ipr.hh revision 9897 
13760SN/A/*
23760SN/A * Copyright (c) 2007-2008 The Hewlett-Packard Development Company
33760SN/A * All rights reserved.
43760SN/A *
53760SN/A * The license below extends only to copyright in the software and shall
63760SN/A * not be construed as granting a license to any other intellectual
73760SN/A * property including but not limited to intellectual property relating
83760SN/A * to a hardware implementation of the functionality of the software
93760SN/A * licensed hereunder.  You may use the software subject to the license
103760SN/A * terms below provided that you ensure that this notice is replicated
113760SN/A * unmodified and in its entirety in all distributions of the software,
123760SN/A * modified or unmodified, in source code or in binary form.
133760SN/A *
143760SN/A * Redistribution and use in source and binary forms, with or without
153760SN/A * modification, are permitted provided that the following conditions are
163760SN/A * met: redistributions of source code must retain the above copyright
173760SN/A * notice, this list of conditions and the following disclaimer;
183760SN/A * redistributions in binary form must reproduce the above copyright
193760SN/A * notice, this list of conditions and the following disclaimer in the
203760SN/A * documentation and/or other materials provided with the distribution;
213760SN/A * neither the name of the copyright holders nor the names of its
223760SN/A * contributors may be used to endorse or promote products derived from
233760SN/A * this software without specific prior written permission.
243760SN/A *
253760SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
263760SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
273760SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
285597Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
293760SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
303760SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
318229Snate@binkert.org * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
323760SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
333760SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
343760SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
355597Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
363760SN/A *
37 * Authors: Gabe Black
38 */
39
40#ifndef __ARCH_X86_MMAPPEDIPR_HH__
41#define __ARCH_X86_MMAPPEDIPR_HH__
42
43/**
44 * @file
45 *
46 * ISA-specific helper functions for memory mapped IPR accesses.
47 */
48
49#include "arch/generic/mmapped_ipr.hh"
50#include "arch/x86/regs/misc.hh"
51#include "cpu/base.hh"
52#include "cpu/thread_context.hh"
53#include "mem/packet.hh"
54
55namespace X86ISA
56{
57    inline Cycles
58    handleIprRead(ThreadContext *xc, Packet *pkt)
59    {
60        if (GenericISA::isGenericIprAccess(pkt)) {
61            return GenericISA::handleGenericIprRead(xc, pkt);
62        } else {
63            Addr offset = pkt->getAddr() & mask(3);
64            MiscRegIndex index = (MiscRegIndex)(
65                pkt->getAddr() / sizeof(MiscReg));
66            MiscReg data = htog(xc->readMiscReg(index));
67            // Make sure we don't trot off the end of data.
68            assert(offset + pkt->getSize() <= sizeof(MiscReg));
69            pkt->setData(((uint8_t *)&data) + offset);
70            return Cycles(1);
71        }
72    }
73
74    inline Cycles
75    handleIprWrite(ThreadContext *xc, Packet *pkt)
76    {
77        if (GenericISA::isGenericIprAccess(pkt)) {
78            return GenericISA::handleGenericIprWrite(xc, pkt);
79        } else {
80            Addr offset = pkt->getAddr() & mask(3);
81            MiscRegIndex index = (MiscRegIndex)(
82                pkt->getAddr() / sizeof(MiscReg));
83            MiscReg data;
84            data = htog(xc->readMiscRegNoEffect(index));
85            // Make sure we don't trot off the end of data.
86            assert(offset + pkt->getSize() <= sizeof(MiscReg));
87            pkt->writeData(((uint8_t *)&data) + offset);
88            xc->setMiscReg(index, gtoh(data));
89            return Cycles(1);
90        }
91    }
92}
93
94#endif // __ARCH_X86_MMAPPEDIPR_HH__
95