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Diffstat (limited to 'src/arch/power/pagetable.hh')
-rw-r--r-- | src/arch/power/pagetable.hh | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/arch/power/pagetable.hh b/src/arch/power/pagetable.hh new file mode 100644 index 000000000..bd2b9d397 --- /dev/null +++ b/src/arch/power/pagetable.hh @@ -0,0 +1,158 @@ +/* + * 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 + * Copyright (c) 2009 The University of Edinburgh + * 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 + * Timothy M. Jones + */ + +#ifndef __ARCH_POWER_PAGETABLE_H__ +#define __ARCH_POWER_PAGETABLE_H__ + +#include "arch/power/isa_traits.hh" +#include "arch/power/utility.hh" +#include "arch/power/vtophys.hh" +#include "config/full_system.hh" + +namespace PowerISA { + +struct VAddr +{ + static const int ImplBits = 43; + static const Addr ImplMask = (ULL(1) << ImplBits) - 1; + static const Addr UnImplMask = ~ImplMask; + + Addr addr; + + VAddr(Addr a) + : addr(a) + {} + + 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 PowerISA::PteAddr(addr >> PageShift); + } + + Addr + level2() const + { + return PowerISA::PteAddr(addr >> (NPtePageShift + PageShift)); + } + + Addr + level1() const + { + return PowerISA::PteAddr(addr >> (2 * NPtePageShift + PageShift)); + } +}; + +// ITB/DTB page table entry +struct PTE +{ + // What parts of the VAddr (from bits 28..11) should be used in + // translation (includes Mask and MaskX from PageMask) + Addr Mask; + + // Virtual Page Number (/2) (Includes VPN2 + VPN2X .. bits 31..11 + // from EntryHi) + Addr VPN; + + // Address Space ID (8 bits) // Lower 8 bits of EntryHi + uint8_t asid; + + // Global Bit - Obtained by an *AND* of EntryLo0 and EntryLo1 G bit + bool G; + + /* 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); +}; + +} // PowerISA namespace + +#endif // __ARCH_POWER_PAGETABLE_H__ + |