pagetable.hh revision 8953
14159Sgblack@eecs.umich.edu/* 24159Sgblack@eecs.umich.edu * Copyright (c) 2007 The Hewlett-Packard Development Company 34159Sgblack@eecs.umich.edu * All rights reserved. 44159Sgblack@eecs.umich.edu * 57087Snate@binkert.org * The license below extends only to copyright in the software and shall 67087Snate@binkert.org * not be construed as granting a license to any other intellectual 77087Snate@binkert.org * property including but not limited to intellectual property relating 87087Snate@binkert.org * to a hardware implementation of the functionality of the software 97087Snate@binkert.org * licensed hereunder. You may use the software subject to the license 107087Snate@binkert.org * terms below provided that you ensure that this notice is replicated 117087Snate@binkert.org * unmodified and in its entirety in all distributions of the software, 127087Snate@binkert.org * modified or unmodified, in source code or in binary form. 134159Sgblack@eecs.umich.edu * 147087Snate@binkert.org * Redistribution and use in source and binary forms, with or without 157087Snate@binkert.org * modification, are permitted provided that the following conditions are 167087Snate@binkert.org * met: redistributions of source code must retain the above copyright 177087Snate@binkert.org * notice, this list of conditions and the following disclaimer; 187087Snate@binkert.org * redistributions in binary form must reproduce the above copyright 197087Snate@binkert.org * notice, this list of conditions and the following disclaimer in the 207087Snate@binkert.org * documentation and/or other materials provided with the distribution; 217087Snate@binkert.org * neither the name of the copyright holders nor the names of its 224159Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 237087Snate@binkert.org * this software without specific prior written permission. 244159Sgblack@eecs.umich.edu * 254159Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 264159Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 274159Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 284159Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 294159Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 304159Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 314159Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 324159Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 334159Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 344159Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 354159Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 364159Sgblack@eecs.umich.edu * 374159Sgblack@eecs.umich.edu * Authors: Gabe Black 384159Sgblack@eecs.umich.edu */ 394159Sgblack@eecs.umich.edu 404159Sgblack@eecs.umich.edu#ifndef __ARCH_X86_PAGETABLE_HH__ 414159Sgblack@eecs.umich.edu#define __ARCH_X86_PAGETABLE_HH__ 424159Sgblack@eecs.umich.edu 435124Sgblack@eecs.umich.edu#include <iostream> 445124Sgblack@eecs.umich.edu#include <string> 455124Sgblack@eecs.umich.edu 465237Sgblack@eecs.umich.edu#include "base/bitunion.hh" 474159Sgblack@eecs.umich.edu#include "base/misc.hh" 486216Snate@binkert.org#include "base/types.hh" 498953Sgblack@eecs.umich.edu#include "base/trie.hh" 504159Sgblack@eecs.umich.edu 515124Sgblack@eecs.umich.educlass Checkpoint; 525124Sgblack@eecs.umich.edu 534159Sgblack@eecs.umich.edunamespace X86ISA 544159Sgblack@eecs.umich.edu{ 558953Sgblack@eecs.umich.edu struct TlbEntry; 568953Sgblack@eecs.umich.edu} 578953Sgblack@eecs.umich.edu 588953Sgblack@eecs.umich.edutypedef Trie<Addr, X86ISA::TlbEntry> TlbEntryTrie; 598953Sgblack@eecs.umich.edu 608953Sgblack@eecs.umich.edunamespace X86ISA 618953Sgblack@eecs.umich.edu{ 625237Sgblack@eecs.umich.edu BitUnion64(VAddr) 635237Sgblack@eecs.umich.edu Bitfield<20, 12> longl1; 645237Sgblack@eecs.umich.edu Bitfield<29, 21> longl2; 655237Sgblack@eecs.umich.edu Bitfield<38, 30> longl3; 665237Sgblack@eecs.umich.edu Bitfield<47, 39> longl4; 675237Sgblack@eecs.umich.edu 685237Sgblack@eecs.umich.edu Bitfield<20, 12> pael1; 695237Sgblack@eecs.umich.edu Bitfield<29, 21> pael2; 705237Sgblack@eecs.umich.edu Bitfield<31, 30> pael3; 715237Sgblack@eecs.umich.edu 725237Sgblack@eecs.umich.edu Bitfield<21, 12> norml1; 735237Sgblack@eecs.umich.edu Bitfield<31, 22> norml2; 745237Sgblack@eecs.umich.edu EndBitUnion(VAddr) 754159Sgblack@eecs.umich.edu 765124Sgblack@eecs.umich.edu struct TlbEntry 774159Sgblack@eecs.umich.edu { 785124Sgblack@eecs.umich.edu // The base of the physical page. 795184Sgblack@eecs.umich.edu Addr paddr; 805184Sgblack@eecs.umich.edu 815184Sgblack@eecs.umich.edu // The beginning of the virtual page this entry maps. 825184Sgblack@eecs.umich.edu Addr vaddr; 838953Sgblack@eecs.umich.edu // The size of the page this represents, in address bits. 848953Sgblack@eecs.umich.edu unsigned logBytes; 855184Sgblack@eecs.umich.edu 865124Sgblack@eecs.umich.edu // Read permission is always available, assuming it isn't blocked by 875124Sgblack@eecs.umich.edu // other mechanisms. 885184Sgblack@eecs.umich.edu bool writable; 895124Sgblack@eecs.umich.edu // Whether this page is accesible without being in supervisor mode. 905124Sgblack@eecs.umich.edu bool user; 915124Sgblack@eecs.umich.edu // Whether to use write through or write back. M5 ignores this and 925124Sgblack@eecs.umich.edu // lets the caches handle the writeback policy. 935124Sgblack@eecs.umich.edu //bool pwt; 945124Sgblack@eecs.umich.edu // Whether the page is cacheable or not. 955124Sgblack@eecs.umich.edu bool uncacheable; 965124Sgblack@eecs.umich.edu // Whether or not to kick this page out on a write to CR3. 975124Sgblack@eecs.umich.edu bool global; 985124Sgblack@eecs.umich.edu // A bit used to form an index into the PAT table. 995124Sgblack@eecs.umich.edu bool patBit; 1005124Sgblack@eecs.umich.edu // Whether or not memory on this page can be executed. 1015124Sgblack@eecs.umich.edu bool noExec; 1028953Sgblack@eecs.umich.edu // A sequence number to keep track of LRU. 1038953Sgblack@eecs.umich.edu uint64_t lruSeq; 1048953Sgblack@eecs.umich.edu 1058953Sgblack@eecs.umich.edu TlbEntryTrie::Handle trieHandle; 1065124Sgblack@eecs.umich.edu 1075184Sgblack@eecs.umich.edu TlbEntry(Addr asn, Addr _vaddr, Addr _paddr); 1085184Sgblack@eecs.umich.edu TlbEntry() {} 1095124Sgblack@eecs.umich.edu 1105877Shsul@eecs.umich.edu void 1115877Shsul@eecs.umich.edu updateVaddr(Addr new_vaddr) 1125877Shsul@eecs.umich.edu { 1135877Shsul@eecs.umich.edu vaddr = new_vaddr; 1145877Shsul@eecs.umich.edu } 1155877Shsul@eecs.umich.edu 1165184Sgblack@eecs.umich.edu Addr pageStart() 1175184Sgblack@eecs.umich.edu { 1185184Sgblack@eecs.umich.edu return paddr; 1195184Sgblack@eecs.umich.edu } 1205124Sgblack@eecs.umich.edu 1215124Sgblack@eecs.umich.edu void serialize(std::ostream &os); 1225124Sgblack@eecs.umich.edu void unserialize(Checkpoint *cp, const std::string §ion); 1234159Sgblack@eecs.umich.edu }; 1244159Sgblack@eecs.umich.edu} 1254159Sgblack@eecs.umich.edu 1264159Sgblack@eecs.umich.edu#endif 127