tlb.hh revision 7399
16019Shines@cs.fsu.edu/* 27399SAli.Saidi@ARM.com * Copyright (c) 2010 ARM Limited 37399SAli.Saidi@ARM.com * All rights reserved 47399SAli.Saidi@ARM.com * 57399SAli.Saidi@ARM.com * The license below extends only to copyright in the software and shall 67399SAli.Saidi@ARM.com * not be construed as granting a license to any other intellectual 77399SAli.Saidi@ARM.com * property including but not limited to intellectual property relating 87399SAli.Saidi@ARM.com * to a hardware implementation of the functionality of the software 97399SAli.Saidi@ARM.com * licensed hereunder. You may use the software subject to the license 107399SAli.Saidi@ARM.com * terms below provided that you ensure that this notice is replicated 117399SAli.Saidi@ARM.com * unmodified and in its entirety in all distributions of the software, 127399SAli.Saidi@ARM.com * modified or unmodified, in source code or in binary form. 137399SAli.Saidi@ARM.com * 146019Shines@cs.fsu.edu * Copyright (c) 2001-2005 The Regents of The University of Michigan 156019Shines@cs.fsu.edu * All rights reserved. 166019Shines@cs.fsu.edu * 176019Shines@cs.fsu.edu * Redistribution and use in source and binary forms, with or without 186019Shines@cs.fsu.edu * modification, are permitted provided that the following conditions are 196019Shines@cs.fsu.edu * met: redistributions of source code must retain the above copyright 206019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer; 216019Shines@cs.fsu.edu * redistributions in binary form must reproduce the above copyright 226019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer in the 236019Shines@cs.fsu.edu * documentation and/or other materials provided with the distribution; 246019Shines@cs.fsu.edu * neither the name of the copyright holders nor the names of its 256019Shines@cs.fsu.edu * contributors may be used to endorse or promote products derived from 266019Shines@cs.fsu.edu * this software without specific prior written permission. 276019Shines@cs.fsu.edu * 286019Shines@cs.fsu.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 296019Shines@cs.fsu.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 306019Shines@cs.fsu.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 316019Shines@cs.fsu.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 326019Shines@cs.fsu.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 336019Shines@cs.fsu.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 346019Shines@cs.fsu.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 356019Shines@cs.fsu.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 366019Shines@cs.fsu.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 376019Shines@cs.fsu.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 386019Shines@cs.fsu.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 396019Shines@cs.fsu.edu * 407399SAli.Saidi@ARM.com * Authors: Ali Saidi 416019Shines@cs.fsu.edu */ 426019Shines@cs.fsu.edu 436019Shines@cs.fsu.edu#ifndef __ARCH_ARM_TLB_HH__ 446019Shines@cs.fsu.edu#define __ARCH_ARM_TLB_HH__ 456019Shines@cs.fsu.edu 466019Shines@cs.fsu.edu#include <map> 476019Shines@cs.fsu.edu 486019Shines@cs.fsu.edu#include "arch/arm/isa_traits.hh" 496019Shines@cs.fsu.edu#include "arch/arm/utility.hh" 506019Shines@cs.fsu.edu#include "arch/arm/vtophys.hh" 516019Shines@cs.fsu.edu#include "arch/arm/pagetable.hh" 526019Shines@cs.fsu.edu#include "base/statistics.hh" 536019Shines@cs.fsu.edu#include "mem/request.hh" 546116Snate@binkert.org#include "params/ArmTLB.hh" 556019Shines@cs.fsu.edu#include "sim/faults.hh" 566019Shines@cs.fsu.edu#include "sim/tlb.hh" 576019Shines@cs.fsu.edu 586019Shines@cs.fsu.educlass ThreadContext; 596019Shines@cs.fsu.edu 606019Shines@cs.fsu.edunamespace ArmISA { 616019Shines@cs.fsu.edu 626019Shines@cs.fsu.educlass TLB : public BaseTLB 636019Shines@cs.fsu.edu{ 647294Sgblack@eecs.umich.edu public: 657294Sgblack@eecs.umich.edu enum ArmFlags { 667294Sgblack@eecs.umich.edu AlignmentMask = 0x7, 677294Sgblack@eecs.umich.edu 687294Sgblack@eecs.umich.edu AlignByte = 0x0, 697294Sgblack@eecs.umich.edu AlignHalfWord = 0x1, 707294Sgblack@eecs.umich.edu AlignWord = 0x3, 717294Sgblack@eecs.umich.edu AlignDoubleWord = 0x7, 727294Sgblack@eecs.umich.edu 737294Sgblack@eecs.umich.edu AllowUnaligned = 0x8, 747294Sgblack@eecs.umich.edu // Because zero otherwise looks like a valid setting and may be used 757294Sgblack@eecs.umich.edu // accidentally, this bit must be non-zero to show it was used on 767294Sgblack@eecs.umich.edu // purpose. 777294Sgblack@eecs.umich.edu MustBeOne = 0x10 787294Sgblack@eecs.umich.edu }; 796019Shines@cs.fsu.edu protected: 806019Shines@cs.fsu.edu typedef std::multimap<Addr, int> PageTable; 816019Shines@cs.fsu.edu PageTable lookupTable; // Quick lookup into page table 826019Shines@cs.fsu.edu 836019Shines@cs.fsu.edu ArmISA::PTE *table; // the Page Table 846019Shines@cs.fsu.edu int size; // TLB Size 856019Shines@cs.fsu.edu int nlu; // not last used entry (for replacement) 866019Shines@cs.fsu.edu 876019Shines@cs.fsu.edu void nextnlu() { if (++nlu >= size) nlu = 0; } 886019Shines@cs.fsu.edu ArmISA::PTE *lookup(Addr vpn, uint8_t asn) const; 896019Shines@cs.fsu.edu 907399SAli.Saidi@ARM.com // Access Stats 916020Sgblack@eecs.umich.edu mutable Stats::Scalar read_hits; 926020Sgblack@eecs.umich.edu mutable Stats::Scalar read_misses; 936020Sgblack@eecs.umich.edu mutable Stats::Scalar read_acv; 946020Sgblack@eecs.umich.edu mutable Stats::Scalar read_accesses; 956020Sgblack@eecs.umich.edu mutable Stats::Scalar write_hits; 966020Sgblack@eecs.umich.edu mutable Stats::Scalar write_misses; 976020Sgblack@eecs.umich.edu mutable Stats::Scalar write_acv; 986020Sgblack@eecs.umich.edu mutable Stats::Scalar write_accesses; 996019Shines@cs.fsu.edu Stats::Formula hits; 1006019Shines@cs.fsu.edu Stats::Formula misses; 1016019Shines@cs.fsu.edu Stats::Formula invalids; 1026019Shines@cs.fsu.edu Stats::Formula accesses; 1036019Shines@cs.fsu.edu 1046019Shines@cs.fsu.edu public: 1056019Shines@cs.fsu.edu typedef ArmTLBParams Params; 1066019Shines@cs.fsu.edu TLB(const Params *p); 1076019Shines@cs.fsu.edu 1086019Shines@cs.fsu.edu virtual ~TLB(); 1096019Shines@cs.fsu.edu int getsize() const { return size; } 1106019Shines@cs.fsu.edu 1116019Shines@cs.fsu.edu void insert(Addr vaddr, ArmISA::PTE &pte); 1126019Shines@cs.fsu.edu void flushAll(); 1136019Shines@cs.fsu.edu void demapPage(Addr vaddr, uint64_t asn) 1146019Shines@cs.fsu.edu { 1156019Shines@cs.fsu.edu panic("demapPage unimplemented.\n"); 1166019Shines@cs.fsu.edu } 1176019Shines@cs.fsu.edu 1186019Shines@cs.fsu.edu static bool validVirtualAddress(Addr vaddr); 1196019Shines@cs.fsu.edu 1206116Snate@binkert.org Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode); 1216116Snate@binkert.org void translateTiming(RequestPtr req, ThreadContext *tc, 1226116Snate@binkert.org Translation *translation, Mode mode); 1236116Snate@binkert.org 1246019Shines@cs.fsu.edu // Checkpointing 1256019Shines@cs.fsu.edu void serialize(std::ostream &os); 1266019Shines@cs.fsu.edu void unserialize(Checkpoint *cp, const std::string §ion); 1276019Shines@cs.fsu.edu 1286019Shines@cs.fsu.edu void regStats(); 1296019Shines@cs.fsu.edu}; 1306019Shines@cs.fsu.edu 1316116Snate@binkert.org/* namespace ArmISA */ } 1326019Shines@cs.fsu.edu 1336019Shines@cs.fsu.edu#endif // __ARCH_ARM_TLB_HH__ 134