page_table.cc revision 10556
12379SN/A/* 210298Salexandru.dutu@amd.com * Copyright (c) 2014 Advanced Micro Devices, Inc. 32379SN/A * Copyright (c) 2003 The Regents of The University of Michigan 42379SN/A * All rights reserved. 52379SN/A * 62379SN/A * Redistribution and use in source and binary forms, with or without 72379SN/A * modification, are permitted provided that the following conditions are 82379SN/A * met: redistributions of source code must retain the above copyright 92379SN/A * notice, this list of conditions and the following disclaimer; 102379SN/A * redistributions in binary form must reproduce the above copyright 112379SN/A * notice, this list of conditions and the following disclaimer in the 122379SN/A * documentation and/or other materials provided with the distribution; 132379SN/A * neither the name of the copyright holders nor the names of its 142379SN/A * contributors may be used to endorse or promote products derived from 152379SN/A * this software without specific prior written permission. 162379SN/A * 172379SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 182379SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 192379SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 202379SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 212379SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 222379SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 232379SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 242379SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 252379SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 262379SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 272379SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 282665Ssaidi@eecs.umich.edu * 292665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 302665Ssaidi@eecs.umich.edu * Ron Dreslinski 313311Ssaidi@eecs.umich.edu * Ali Saidi 322379SN/A */ 332379SN/A 342379SN/A/** 352379SN/A * @file 3610298Salexandru.dutu@amd.com * Definitions of functional page table. 372379SN/A */ 388229Snate@binkert.org#include <fstream> 398229Snate@binkert.org#include <map> 402379SN/A#include <string> 412379SN/A 422399SN/A#include "base/bitfield.hh" 432379SN/A#include "base/intmath.hh" 442379SN/A#include "base/trace.hh" 456658Snate@binkert.org#include "config/the_isa.hh" 468232Snate@binkert.org#include "debug/MMU.hh" 472379SN/A#include "mem/page_table.hh" 487678Sgblack@eecs.umich.edu#include "sim/faults.hh" 492379SN/A#include "sim/sim_object.hh" 502379SN/A 512399SN/Ausing namespace std; 522423SN/Ausing namespace TheISA; 532399SN/A 5410556Salexandru.dutu@amd.comFuncPageTable::FuncPageTable(const std::string &__name, 5510556Salexandru.dutu@amd.com uint64_t _pid, Addr _pageSize) 5610298Salexandru.dutu@amd.com : PageTableBase(__name, _pid, _pageSize) 572379SN/A{ 582379SN/A} 592379SN/A 6010298Salexandru.dutu@amd.comFuncPageTable::~FuncPageTable() 612379SN/A{ 622379SN/A} 632379SN/A 642399SN/Avoid 6510298Salexandru.dutu@amd.comFuncPageTable::map(Addr vaddr, Addr paddr, int64_t size, bool clobber) 662399SN/A{ 672399SN/A // starting address must be page aligned 682399SN/A assert(pageOffset(vaddr) == 0); 692399SN/A 703311Ssaidi@eecs.umich.edu DPRINTF(MMU, "Allocating Page: %#x-%#x\n", vaddr, vaddr+ size); 713311Ssaidi@eecs.umich.edu 728601Ssteve.reinhardt@amd.com for (; size > 0; size -= pageSize, vaddr += pageSize, paddr += pageSize) { 738600Ssteve.reinhardt@amd.com if (!clobber && (pTable.find(vaddr) != pTable.end())) { 742399SN/A // already mapped 7510556Salexandru.dutu@amd.com fatal("FuncPageTable::allocate: addr 0x%x already mapped", vaddr); 762399SN/A } 772399SN/A 788601Ssteve.reinhardt@amd.com pTable[vaddr] = TheISA::TlbEntry(pid, vaddr, paddr); 799676Smitch.hayenga+gem5@gmail.com eraseCacheEntry(vaddr); 804521Ssaidi@eecs.umich.edu updateCache(vaddr, pTable[vaddr]); 812399SN/A } 822399SN/A} 832399SN/A 845877Shsul@eecs.umich.eduvoid 8510298Salexandru.dutu@amd.comFuncPageTable::remap(Addr vaddr, int64_t size, Addr new_vaddr) 865877Shsul@eecs.umich.edu{ 875877Shsul@eecs.umich.edu assert(pageOffset(vaddr) == 0); 885877Shsul@eecs.umich.edu assert(pageOffset(new_vaddr) == 0); 895877Shsul@eecs.umich.edu 905877Shsul@eecs.umich.edu DPRINTF(MMU, "moving pages from vaddr %08p to %08p, size = %d\n", vaddr, 915877Shsul@eecs.umich.edu new_vaddr, size); 925877Shsul@eecs.umich.edu 9310556Salexandru.dutu@amd.com for (; size > 0; 9410556Salexandru.dutu@amd.com size -= pageSize, vaddr += pageSize, new_vaddr += pageSize) 9510556Salexandru.dutu@amd.com { 968641Snate@binkert.org assert(pTable.find(vaddr) != pTable.end()); 975877Shsul@eecs.umich.edu 985877Shsul@eecs.umich.edu pTable[new_vaddr] = pTable[vaddr]; 995877Shsul@eecs.umich.edu pTable.erase(vaddr); 1009676Smitch.hayenga+gem5@gmail.com eraseCacheEntry(vaddr); 1015877Shsul@eecs.umich.edu pTable[new_vaddr].updateVaddr(new_vaddr); 1025877Shsul@eecs.umich.edu updateCache(new_vaddr, pTable[new_vaddr]); 1035877Shsul@eecs.umich.edu } 1045877Shsul@eecs.umich.edu} 1055877Shsul@eecs.umich.edu 1065877Shsul@eecs.umich.eduvoid 10710298Salexandru.dutu@amd.comFuncPageTable::unmap(Addr vaddr, int64_t size) 1085877Shsul@eecs.umich.edu{ 1095877Shsul@eecs.umich.edu assert(pageOffset(vaddr) == 0); 1105877Shsul@eecs.umich.edu 1118601Ssteve.reinhardt@amd.com DPRINTF(MMU, "Unmapping page: %#x-%#x\n", vaddr, vaddr+ size); 1125877Shsul@eecs.umich.edu 1135877Shsul@eecs.umich.edu for (; size > 0; size -= pageSize, vaddr += pageSize) { 1148641Snate@binkert.org assert(pTable.find(vaddr) != pTable.end()); 1155877Shsul@eecs.umich.edu pTable.erase(vaddr); 1169676Smitch.hayenga+gem5@gmail.com eraseCacheEntry(vaddr); 1175877Shsul@eecs.umich.edu } 1185877Shsul@eecs.umich.edu 1195877Shsul@eecs.umich.edu} 1205877Shsul@eecs.umich.edu 1212399SN/Abool 12210298Salexandru.dutu@amd.comFuncPageTable::isUnmapped(Addr vaddr, int64_t size) 1238600Ssteve.reinhardt@amd.com{ 1248600Ssteve.reinhardt@amd.com // starting address must be page aligned 1258600Ssteve.reinhardt@amd.com assert(pageOffset(vaddr) == 0); 1268600Ssteve.reinhardt@amd.com 1278600Ssteve.reinhardt@amd.com for (; size > 0; size -= pageSize, vaddr += pageSize) { 1288600Ssteve.reinhardt@amd.com if (pTable.find(vaddr) != pTable.end()) { 1298600Ssteve.reinhardt@amd.com return false; 1308600Ssteve.reinhardt@amd.com } 1318600Ssteve.reinhardt@amd.com } 1328600Ssteve.reinhardt@amd.com 1338600Ssteve.reinhardt@amd.com return true; 1348600Ssteve.reinhardt@amd.com} 1358600Ssteve.reinhardt@amd.com 1368600Ssteve.reinhardt@amd.combool 13710298Salexandru.dutu@amd.comFuncPageTable::lookup(Addr vaddr, TheISA::TlbEntry &entry) 1382399SN/A{ 1392399SN/A Addr page_addr = pageAlign(vaddr); 1402809Ssaidi@eecs.umich.edu 1419676Smitch.hayenga+gem5@gmail.com if (pTableCache[0].valid && pTableCache[0].vaddr == page_addr) { 1425004Sgblack@eecs.umich.edu entry = pTableCache[0].entry; 1432809Ssaidi@eecs.umich.edu return true; 1442809Ssaidi@eecs.umich.edu } 1459676Smitch.hayenga+gem5@gmail.com if (pTableCache[1].valid && pTableCache[1].vaddr == page_addr) { 1465004Sgblack@eecs.umich.edu entry = pTableCache[1].entry; 1472809Ssaidi@eecs.umich.edu return true; 1482809Ssaidi@eecs.umich.edu } 1499676Smitch.hayenga+gem5@gmail.com if (pTableCache[2].valid && pTableCache[2].vaddr == page_addr) { 1505004Sgblack@eecs.umich.edu entry = pTableCache[2].entry; 1512809Ssaidi@eecs.umich.edu return true; 1522809Ssaidi@eecs.umich.edu } 1532809Ssaidi@eecs.umich.edu 1545004Sgblack@eecs.umich.edu PTableItr iter = pTable.find(page_addr); 1552399SN/A 1562399SN/A if (iter == pTable.end()) { 1572399SN/A return false; 1582399SN/A } 1592399SN/A 1604521Ssaidi@eecs.umich.edu updateCache(page_addr, iter->second); 1615004Sgblack@eecs.umich.edu entry = iter->second; 1622399SN/A return true; 1632399SN/A} 1642399SN/A 1655004Sgblack@eecs.umich.edubool 16610298Salexandru.dutu@amd.comPageTableBase::translate(Addr vaddr, Addr &paddr) 1675004Sgblack@eecs.umich.edu{ 1685004Sgblack@eecs.umich.edu TheISA::TlbEntry entry; 1695183Ssaidi@eecs.umich.edu if (!lookup(vaddr, entry)) { 1705183Ssaidi@eecs.umich.edu DPRINTF(MMU, "Couldn't Translate: %#x\n", vaddr); 1715004Sgblack@eecs.umich.edu return false; 1725183Ssaidi@eecs.umich.edu } 1735184Sgblack@eecs.umich.edu paddr = pageOffset(vaddr) + entry.pageStart(); 1745183Ssaidi@eecs.umich.edu DPRINTF(MMU, "Translating: %#x->%#x\n", vaddr, paddr); 1755004Sgblack@eecs.umich.edu return true; 1765004Sgblack@eecs.umich.edu} 1772399SN/A 1782394SN/AFault 17910298Salexandru.dutu@amd.comPageTableBase::translate(RequestPtr req) 1802394SN/A{ 1812532SN/A Addr paddr; 1822532SN/A assert(pageAlign(req->getVaddr() + req->getSize() - 1) 1832532SN/A == pageAlign(req->getVaddr())); 1842532SN/A if (!translate(req->getVaddr(), paddr)) { 1855004Sgblack@eecs.umich.edu return Fault(new GenericPageTableFault(req->getVaddr())); 1862399SN/A } 1872532SN/A req->setPaddr(paddr); 1885004Sgblack@eecs.umich.edu if ((paddr & (pageSize - 1)) + req->getSize() > pageSize) { 1895004Sgblack@eecs.umich.edu panic("Request spans page boundaries!\n"); 1905004Sgblack@eecs.umich.edu return NoFault; 1915004Sgblack@eecs.umich.edu } 1925004Sgblack@eecs.umich.edu return NoFault; 1932394SN/A} 1943311Ssaidi@eecs.umich.edu 1953311Ssaidi@eecs.umich.eduvoid 19610298Salexandru.dutu@amd.comFuncPageTable::serialize(std::ostream &os) 1973311Ssaidi@eecs.umich.edu{ 1983311Ssaidi@eecs.umich.edu paramOut(os, "ptable.size", pTable.size()); 1993320Shsul@eecs.umich.edu 2006227Snate@binkert.org PTable::size_type count = 0; 2013311Ssaidi@eecs.umich.edu 2025004Sgblack@eecs.umich.edu PTableItr iter = pTable.begin(); 2035004Sgblack@eecs.umich.edu PTableItr end = pTable.end(); 2043347Sbinkertn@umich.edu while (iter != end) { 2058601Ssteve.reinhardt@amd.com os << "\n[" << csprintf("%s.Entry%d", name(), count) << "]\n"; 2065183Ssaidi@eecs.umich.edu 2075183Ssaidi@eecs.umich.edu paramOut(os, "vaddr", iter->first); 2085004Sgblack@eecs.umich.edu iter->second.serialize(os); 2093347Sbinkertn@umich.edu 2103347Sbinkertn@umich.edu ++iter; 2113347Sbinkertn@umich.edu ++count; 2123311Ssaidi@eecs.umich.edu } 2133311Ssaidi@eecs.umich.edu assert(count == pTable.size()); 2143311Ssaidi@eecs.umich.edu} 2153311Ssaidi@eecs.umich.edu 2163311Ssaidi@eecs.umich.eduvoid 21710298Salexandru.dutu@amd.comFuncPageTable::unserialize(Checkpoint *cp, const std::string §ion) 2183311Ssaidi@eecs.umich.edu{ 2193311Ssaidi@eecs.umich.edu int i = 0, count; 2203311Ssaidi@eecs.umich.edu paramIn(cp, section, "ptable.size", count); 2213311Ssaidi@eecs.umich.edu 2223311Ssaidi@eecs.umich.edu pTable.clear(); 2233311Ssaidi@eecs.umich.edu 2248763Sgblack@eecs.umich.edu while (i < count) { 2258763Sgblack@eecs.umich.edu TheISA::TlbEntry *entry; 2268763Sgblack@eecs.umich.edu Addr vaddr; 2278763Sgblack@eecs.umich.edu 2288601Ssteve.reinhardt@amd.com paramIn(cp, csprintf("%s.Entry%d", name(), i), "vaddr", vaddr); 2295183Ssaidi@eecs.umich.edu entry = new TheISA::TlbEntry(); 2308601Ssteve.reinhardt@amd.com entry->unserialize(cp, csprintf("%s.Entry%d", name(), i)); 2315183Ssaidi@eecs.umich.edu pTable[vaddr] = *entry; 2329086Sandreas.hansson@arm.com delete entry; 2333311Ssaidi@eecs.umich.edu ++i; 2346818SLisa.Hsu@amd.com } 2353311Ssaidi@eecs.umich.edu} 2363311Ssaidi@eecs.umich.edu 237