103 lines
4.1 KiB
C++
103 lines
4.1 KiB
C++
/*
|
|
* Copyright (c) 2002-2005 The Regents of The University of Michigan
|
|
* Copyright (c) 2007 MIPS Technologies, Inc.
|
|
* Copyright (c) 2007-2008 The Florida State University
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met: redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer;
|
|
* redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution;
|
|
* neither the name of the copyright holders nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* Authors: Nathan Binkert
|
|
* Steve Reinhardt
|
|
* Jaidev Patwardhan
|
|
* Stephen Hines
|
|
*/
|
|
|
|
#ifndef __ARCH_ARM_PAGETABLE_H__
|
|
#define __ARCH_ARM_PAGETABLE_H__
|
|
|
|
#include "arch/arm/isa_traits.hh"
|
|
#include "arch/arm/utility.hh"
|
|
#include "arch/arm/vtophys.hh"
|
|
#include "config/full_system.hh"
|
|
|
|
namespace ArmISA {
|
|
|
|
struct VAddr
|
|
{
|
|
static const int ImplBits = 43;
|
|
static const Addr ImplMask = (ULL(1) << ImplBits) - 1;
|
|
static const Addr UnImplMask = ~ImplMask;
|
|
|
|
VAddr(Addr a) : addr(a) {}
|
|
Addr addr;
|
|
operator Addr() const { return addr; }
|
|
const VAddr &operator=(Addr a) { addr = a; return *this; }
|
|
|
|
Addr vpn() const { return (addr & ImplMask) >> PageShift; }
|
|
Addr page() const { return addr & Page_Mask; }
|
|
Addr offset() const { return addr & PageOffset; }
|
|
|
|
Addr level3() const
|
|
{ return ArmISA::PteAddr(addr >> PageShift); }
|
|
Addr level2() const
|
|
{ return ArmISA::PteAddr(addr >> (NPtePageShift + PageShift)); }
|
|
Addr level1() const
|
|
{ return ArmISA::PteAddr(addr >> (2 * NPtePageShift + PageShift)); }
|
|
};
|
|
|
|
// ITB/DTB page table entry
|
|
struct PTE
|
|
{
|
|
Addr Mask; // What parts of the VAddr (from bits 28..11) should be used in translation (includes Mask and MaskX from PageMask)
|
|
Addr VPN; // Virtual Page Number (/2) (Includes VPN2 + VPN2X .. bits 31..11 from EntryHi)
|
|
uint8_t asid; // Address Space ID (8 bits) // Lower 8 bits of EntryHi
|
|
|
|
bool G; // Global Bit - Obtained by an *AND* of EntryLo0 and EntryLo1 G bit
|
|
|
|
/* Contents of Entry Lo0 */
|
|
Addr PFN0; // Physical Frame Number - Even
|
|
bool D0; // Even entry Dirty Bit
|
|
bool V0; // Even entry Valid Bit
|
|
uint8_t C0; // Cache Coherency Bits - Even
|
|
|
|
/* Contents of Entry Lo1 */
|
|
Addr PFN1; // Physical Frame Number - Odd
|
|
bool D1; // Odd entry Dirty Bit
|
|
bool V1; // Odd entry Valid Bit
|
|
uint8_t C1; // Cache Coherency Bits (3 bits)
|
|
|
|
/* The next few variables are put in as optimizations to reduce TLB lookup overheads */
|
|
/* For a given Mask, what is the address shift amount, and what is the OffsetMask */
|
|
int AddrShiftAmount;
|
|
int OffsetMask;
|
|
|
|
bool Valid() { return (V0 | V1);};
|
|
void serialize(std::ostream &os);
|
|
void unserialize(Checkpoint *cp, const std::string §ion);
|
|
};
|
|
|
|
};
|
|
#endif // __ARCH_ARM_PAGETABLE_H__
|
|
|