page_table.hh revision 6658
12379SN/A/* 22379SN/A * Copyright (c) 2003 The Regents of The University of Michigan 32379SN/A * All rights reserved. 42379SN/A * 52379SN/A * Redistribution and use in source and binary forms, with or without 62379SN/A * modification, are permitted provided that the following conditions are 72379SN/A * met: redistributions of source code must retain the above copyright 82379SN/A * notice, this list of conditions and the following disclaimer; 92379SN/A * redistributions in binary form must reproduce the above copyright 102379SN/A * notice, this list of conditions and the following disclaimer in the 112379SN/A * documentation and/or other materials provided with the distribution; 122379SN/A * neither the name of the copyright holders nor the names of its 132379SN/A * contributors may be used to endorse or promote products derived from 142379SN/A * this software without specific prior written permission. 152379SN/A * 162379SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172379SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182379SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192379SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202379SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212379SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222379SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232379SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242379SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252379SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262379SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 292379SN/A */ 302379SN/A 312379SN/A/** 322379SN/A * @file 332379SN/A * Declaration of a non-full system Page Table. 342379SN/A */ 352379SN/A 366216Snate@binkert.org#ifndef __MEM_PAGE_TABLE_HH__ 376216Snate@binkert.org#define __MEM_PAGE_TABLE_HH__ 382379SN/A 392379SN/A#include <string> 402379SN/A 412423SN/A#include "arch/isa_traits.hh" 425004Sgblack@eecs.umich.edu#include "arch/tlb.hh" 432809Ssaidi@eecs.umich.edu#include "base/hashmap.hh" 446216Snate@binkert.org#include "base/types.hh" 456658Snate@binkert.org#include "config/the_isa.hh" 462394SN/A#include "mem/request.hh" 476216Snate@binkert.org#include "sim/faults.hh" 485004Sgblack@eecs.umich.edu#include "sim/serialize.hh" 492379SN/A 505184Sgblack@eecs.umich.educlass Process; 512379SN/A 522379SN/A/** 532982Sstever@eecs.umich.edu * Page Table Declaration. 542379SN/A */ 552399SN/Aclass PageTable 562379SN/A{ 572379SN/A protected: 585004Sgblack@eecs.umich.edu typedef m5::hash_map<Addr, TheISA::TlbEntry> PTable; 595004Sgblack@eecs.umich.edu typedef PTable::iterator PTableItr; 605004Sgblack@eecs.umich.edu PTable pTable; 612809Ssaidi@eecs.umich.edu 622809Ssaidi@eecs.umich.edu struct cacheElement { 632809Ssaidi@eecs.umich.edu Addr vaddr; 645004Sgblack@eecs.umich.edu TheISA::TlbEntry entry; 655004Sgblack@eecs.umich.edu }; 662809Ssaidi@eecs.umich.edu 672809Ssaidi@eecs.umich.edu struct cacheElement pTableCache[3]; 682379SN/A 692399SN/A const Addr pageSize; 702399SN/A const Addr offsetMask; 712399SN/A 725184Sgblack@eecs.umich.edu Process *process; 732379SN/A 742379SN/A public: 752379SN/A 765184Sgblack@eecs.umich.edu PageTable(Process *_process, Addr _pageSize = TheISA::VMPageSize); 772379SN/A 782379SN/A ~PageTable(); 792379SN/A 802399SN/A Addr pageAlign(Addr a) { return (a & ~offsetMask); } 812399SN/A Addr pageOffset(Addr a) { return (a & offsetMask); } 822379SN/A 835004Sgblack@eecs.umich.edu void allocate(Addr vaddr, int64_t size); 845877Shsul@eecs.umich.edu void remap(Addr vaddr, int64_t size, Addr new_vaddr); 855877Shsul@eecs.umich.edu void deallocate(Addr vaddr, int64_t size); 862379SN/A 875004Sgblack@eecs.umich.edu /** 885004Sgblack@eecs.umich.edu * Lookup function 895004Sgblack@eecs.umich.edu * @param vaddr The virtual address. 905004Sgblack@eecs.umich.edu * @return entry The page table entry corresponding to vaddr. 915004Sgblack@eecs.umich.edu */ 925004Sgblack@eecs.umich.edu bool lookup(Addr vaddr, TheISA::TlbEntry &entry); 932399SN/A 942379SN/A /** 952379SN/A * Translate function 962379SN/A * @param vaddr The virtual address. 975748SSteve.Reinhardt@amd.com * @param paddr Physical address from translation. 985748SSteve.Reinhardt@amd.com * @return True if translation exists 992379SN/A */ 1002399SN/A bool translate(Addr vaddr, Addr &paddr); 1012379SN/A 1022379SN/A /** 1035748SSteve.Reinhardt@amd.com * Simplified translate function (just check for translation) 1045748SSteve.Reinhardt@amd.com * @param vaddr The virtual address. 1055748SSteve.Reinhardt@amd.com * @return True if translation exists 1065748SSteve.Reinhardt@amd.com */ 1075748SSteve.Reinhardt@amd.com bool translate(Addr vaddr) { Addr dummy; return translate(vaddr, dummy); } 1085748SSteve.Reinhardt@amd.com 1095748SSteve.Reinhardt@amd.com /** 1102399SN/A * Perform a translation on the memory request, fills in paddr 1115004Sgblack@eecs.umich.edu * field of req. 1122379SN/A * @param req The memory request. 1132379SN/A */ 1145004Sgblack@eecs.umich.edu Fault translate(RequestPtr req); 1152379SN/A 1164521Ssaidi@eecs.umich.edu /** 1174521Ssaidi@eecs.umich.edu * Update the page table cache. 1184521Ssaidi@eecs.umich.edu * @param vaddr virtual address (page aligned) to check 1195004Sgblack@eecs.umich.edu * @param pte page table entry to return 1204521Ssaidi@eecs.umich.edu */ 1215004Sgblack@eecs.umich.edu inline void updateCache(Addr vaddr, TheISA::TlbEntry entry) 1224521Ssaidi@eecs.umich.edu { 1235004Sgblack@eecs.umich.edu pTableCache[2].entry = pTableCache[1].entry; 1244521Ssaidi@eecs.umich.edu pTableCache[2].vaddr = pTableCache[1].vaddr; 1255004Sgblack@eecs.umich.edu pTableCache[1].entry = pTableCache[0].entry; 1264521Ssaidi@eecs.umich.edu pTableCache[1].vaddr = pTableCache[0].vaddr; 1275004Sgblack@eecs.umich.edu pTableCache[0].entry = entry; 1284521Ssaidi@eecs.umich.edu pTableCache[0].vaddr = vaddr; 1294521Ssaidi@eecs.umich.edu } 1304521Ssaidi@eecs.umich.edu 1314521Ssaidi@eecs.umich.edu 1323311Ssaidi@eecs.umich.edu void serialize(std::ostream &os); 1335004Sgblack@eecs.umich.edu 1343311Ssaidi@eecs.umich.edu void unserialize(Checkpoint *cp, const std::string §ion); 1352379SN/A}; 1362379SN/A 1376216Snate@binkert.org#endif // __MEM_PAGE_TABLE_HH__ 138