133 lines
4.8 KiB
C++
133 lines
4.8 KiB
C++
/*
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* Copyright (c) 2007 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* Redistribution and use of this software in source and binary forms,
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* with or without modification, are permitted provided that the
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* following conditions are met:
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*
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* The software must be used only for Non-Commercial Use which means any
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* use which is NOT directed to receiving any direct monetary
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* compensation for, or commercial advantage from such use. Illustrative
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* examples of non-commercial use are academic research, personal study,
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* teaching, education and corporate research & development.
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* Illustrative examples of commercial use are distributing products for
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* commercial advantage and providing services using the software for
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* commercial advantage.
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*
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* If you wish to use this software or functionality therein that may be
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* covered by patents for commercial use, please contact:
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* Director of Intellectual Property Licensing
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* Office of Strategy and Technology
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* Hewlett-Packard Company
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* 1501 Page Mill Road
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* Palo Alto, California 94304
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer. Redistributions
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* in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution. Neither the name of
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* the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission. No right of
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* sublicense is granted herewith. Derivatives of the software and
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* output created using the software may be prepared, but only for
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* Non-Commercial Uses. Derivatives of the software may be shared with
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* others provided: (i) the others agree to abide by the list of
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* conditions herein which includes the Non-Commercial Use restrictions;
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* and (ii) such Derivatives of the software include the above copyright
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* notice to acknowledge the contribution from this software where
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* applicable, this list of conditions and the disclaimer below.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#ifndef __ARCH_X86_PAGETABLE_HH__
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#define __ARCH_X86_PAGETABLE_HH__
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#include <iostream>
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#include <string>
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#include "base/bitunion.hh"
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#include "base/misc.hh"
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#include "base/types.hh"
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class Checkpoint;
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namespace X86ISA
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{
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BitUnion64(VAddr)
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Bitfield<20, 12> longl1;
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Bitfield<29, 21> longl2;
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Bitfield<38, 30> longl3;
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Bitfield<47, 39> longl4;
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Bitfield<20, 12> pael1;
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Bitfield<29, 21> pael2;
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Bitfield<31, 30> pael3;
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Bitfield<21, 12> norml1;
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Bitfield<31, 22> norml2;
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EndBitUnion(VAddr)
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struct TlbEntry
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{
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// The base of the physical page.
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Addr paddr;
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// The beginning of the virtual page this entry maps.
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Addr vaddr;
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// The size of the page this entry represents.
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Addr size;
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// Read permission is always available, assuming it isn't blocked by
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// other mechanisms.
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bool writable;
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// Whether this page is accesible without being in supervisor mode.
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bool user;
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// Whether to use write through or write back. M5 ignores this and
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// lets the caches handle the writeback policy.
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//bool pwt;
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// Whether the page is cacheable or not.
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bool uncacheable;
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// Whether or not to kick this page out on a write to CR3.
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bool global;
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// A bit used to form an index into the PAT table.
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bool patBit;
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// Whether or not memory on this page can be executed.
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bool noExec;
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TlbEntry(Addr asn, Addr _vaddr, Addr _paddr);
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TlbEntry() {}
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void
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updateVaddr(Addr new_vaddr)
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{
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vaddr = new_vaddr;
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}
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Addr pageStart()
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{
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return paddr;
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}
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void serialize(std::ostream &os);
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void unserialize(Checkpoint *cp, const std::string §ion);
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};
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}
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#endif
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