pagetable.hh revision 6216
16019Shines@cs.fsu.edu/* 26019Shines@cs.fsu.edu * Copyright (c) 2002-2005 The Regents of The University of Michigan 36019Shines@cs.fsu.edu * Copyright (c) 2007 MIPS Technologies, Inc. 46019Shines@cs.fsu.edu * Copyright (c) 2007-2008 The Florida State University 56019Shines@cs.fsu.edu * All rights reserved. 66019Shines@cs.fsu.edu * 76019Shines@cs.fsu.edu * Redistribution and use in source and binary forms, with or without 86019Shines@cs.fsu.edu * modification, are permitted provided that the following conditions are 96019Shines@cs.fsu.edu * met: redistributions of source code must retain the above copyright 106019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer; 116019Shines@cs.fsu.edu * redistributions in binary form must reproduce the above copyright 126019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer in the 136019Shines@cs.fsu.edu * documentation and/or other materials provided with the distribution; 146019Shines@cs.fsu.edu * neither the name of the copyright holders nor the names of its 156019Shines@cs.fsu.edu * contributors may be used to endorse or promote products derived from 166019Shines@cs.fsu.edu * this software without specific prior written permission. 176019Shines@cs.fsu.edu * 186019Shines@cs.fsu.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 196019Shines@cs.fsu.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 206019Shines@cs.fsu.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 216019Shines@cs.fsu.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 226019Shines@cs.fsu.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 236019Shines@cs.fsu.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 246019Shines@cs.fsu.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 256019Shines@cs.fsu.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 266019Shines@cs.fsu.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 276019Shines@cs.fsu.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 286019Shines@cs.fsu.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 296019Shines@cs.fsu.edu * 306019Shines@cs.fsu.edu * Authors: Nathan Binkert 316019Shines@cs.fsu.edu * Steve Reinhardt 326019Shines@cs.fsu.edu * Jaidev Patwardhan 336019Shines@cs.fsu.edu * Stephen Hines 346019Shines@cs.fsu.edu */ 356019Shines@cs.fsu.edu 366019Shines@cs.fsu.edu#ifndef __ARCH_ARM_PAGETABLE_H__ 376019Shines@cs.fsu.edu#define __ARCH_ARM_PAGETABLE_H__ 386019Shines@cs.fsu.edu 396019Shines@cs.fsu.edu#include "arch/arm/isa_traits.hh" 406019Shines@cs.fsu.edu#include "arch/arm/utility.hh" 416019Shines@cs.fsu.edu#include "arch/arm/vtophys.hh" 426019Shines@cs.fsu.edu#include "config/full_system.hh" 436019Shines@cs.fsu.edu 446019Shines@cs.fsu.edunamespace ArmISA { 456019Shines@cs.fsu.edu 466019Shines@cs.fsu.edu struct VAddr 476019Shines@cs.fsu.edu { 486019Shines@cs.fsu.edu static const int ImplBits = 43; 496019Shines@cs.fsu.edu static const Addr ImplMask = (ULL(1) << ImplBits) - 1; 506019Shines@cs.fsu.edu static const Addr UnImplMask = ~ImplMask; 516019Shines@cs.fsu.edu 526019Shines@cs.fsu.edu VAddr(Addr a) : addr(a) {} 536019Shines@cs.fsu.edu Addr addr; 546019Shines@cs.fsu.edu operator Addr() const { return addr; } 556019Shines@cs.fsu.edu const VAddr &operator=(Addr a) { addr = a; return *this; } 566019Shines@cs.fsu.edu 576019Shines@cs.fsu.edu Addr vpn() const { return (addr & ImplMask) >> PageShift; } 586019Shines@cs.fsu.edu Addr page() const { return addr & Page_Mask; } 596019Shines@cs.fsu.edu Addr offset() const { return addr & PageOffset; } 606019Shines@cs.fsu.edu 616019Shines@cs.fsu.edu Addr level3() const 626019Shines@cs.fsu.edu { return ArmISA::PteAddr(addr >> PageShift); } 636019Shines@cs.fsu.edu Addr level2() const 646019Shines@cs.fsu.edu { return ArmISA::PteAddr(addr >> (NPtePageShift + PageShift)); } 656019Shines@cs.fsu.edu Addr level1() const 666019Shines@cs.fsu.edu { return ArmISA::PteAddr(addr >> (2 * NPtePageShift + PageShift)); } 676019Shines@cs.fsu.edu }; 686019Shines@cs.fsu.edu 696019Shines@cs.fsu.edu // ITB/DTB page table entry 706019Shines@cs.fsu.edu struct PTE 716019Shines@cs.fsu.edu { 726019Shines@cs.fsu.edu Addr Mask; // What parts of the VAddr (from bits 28..11) should be used in translation (includes Mask and MaskX from PageMask) 736019Shines@cs.fsu.edu Addr VPN; // Virtual Page Number (/2) (Includes VPN2 + VPN2X .. bits 31..11 from EntryHi) 746019Shines@cs.fsu.edu uint8_t asid; // Address Space ID (8 bits) // Lower 8 bits of EntryHi 756019Shines@cs.fsu.edu 766019Shines@cs.fsu.edu bool G; // Global Bit - Obtained by an *AND* of EntryLo0 and EntryLo1 G bit 776019Shines@cs.fsu.edu 786019Shines@cs.fsu.edu /* Contents of Entry Lo0 */ 796019Shines@cs.fsu.edu Addr PFN0; // Physical Frame Number - Even 806019Shines@cs.fsu.edu bool D0; // Even entry Dirty Bit 816019Shines@cs.fsu.edu bool V0; // Even entry Valid Bit 826019Shines@cs.fsu.edu uint8_t C0; // Cache Coherency Bits - Even 836019Shines@cs.fsu.edu 846019Shines@cs.fsu.edu /* Contents of Entry Lo1 */ 856019Shines@cs.fsu.edu Addr PFN1; // Physical Frame Number - Odd 866019Shines@cs.fsu.edu bool D1; // Odd entry Dirty Bit 876019Shines@cs.fsu.edu bool V1; // Odd entry Valid Bit 886019Shines@cs.fsu.edu uint8_t C1; // Cache Coherency Bits (3 bits) 896019Shines@cs.fsu.edu 906019Shines@cs.fsu.edu /* The next few variables are put in as optimizations to reduce TLB lookup overheads */ 916019Shines@cs.fsu.edu /* For a given Mask, what is the address shift amount, and what is the OffsetMask */ 926019Shines@cs.fsu.edu int AddrShiftAmount; 936019Shines@cs.fsu.edu int OffsetMask; 946019Shines@cs.fsu.edu 956019Shines@cs.fsu.edu bool Valid() { return (V0 | V1);}; 966019Shines@cs.fsu.edu void serialize(std::ostream &os); 976019Shines@cs.fsu.edu void unserialize(Checkpoint *cp, const std::string §ion); 986019Shines@cs.fsu.edu }; 996019Shines@cs.fsu.edu 1006019Shines@cs.fsu.edu}; 1016019Shines@cs.fsu.edu#endif // __ARCH_ARM_PAGETABLE_H__ 1026019Shines@cs.fsu.edu 103