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/*
* Copyright (c) 2010 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* 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: Ali Saidi
*/
#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
{
VAddr(Addr a) { panic("not implemented yet."); }
};
// ITB/DTB page table entry
struct PTE
{
void serialize(std::ostream &os)
{
panic("Need to implement PTE serialization\n");
}
void unserialize(Checkpoint *cp, const std::string §ion)
{
panic("Need to implement PTE serialization\n");
}
};
struct TlbRange
{
Addr va;
Addr size;
int contextId;
bool global;
inline bool
operator<(const TlbRange &r2) const
{
if (!(global || r2.global)) {
if (contextId < r2.contextId)
return true;
else if (contextId > r2.contextId)
return false;
}
if (va < r2.va)
return true;
return false;
}
inline bool
operator==(const TlbRange &r2) const
{
return va == r2.va &&
size == r2.size &&
contextId == r2.contextId &&
global == r2.global;
}
};
// ITB/DTB table entry
struct TlbEntry
{
public:
enum MemoryType {
StronglyOrdered,
Device,
Normal
};
enum DomainType {
DomainNoAccess = 0,
DomainClient,
DomainReserved,
DomainManager
};
// Matching variables
Addr pfn;
Addr size; // Size of this entry, == Type of TLB Rec
Addr vpn; // Virtual Page Number
uint32_t asid; // Address Space Identifier
uint8_t N; // Number of bits in pagesize
bool global;
bool valid;
// Type of memory
bool nonCacheable; // Can we wrap this in mtype?
bool sNp; // Section descriptor
// Access permissions
bool xn; // Execute Never
uint8_t ap:3; // Access permissions bits
uint8_t domain:4; // Access Domain
TlbRange range; // For fast TLB searching
//Construct an entry that maps to physical address addr for SE mode
TlbEntry(Addr _asn, Addr _vaddr, Addr _paddr)
{
pfn = _paddr >> PageShift;
size = PageBytes - 1;
asid = _asn;
global = false;
valid = true;
vpn = _vaddr >> PageShift;
nonCacheable = sNp = false;
xn = 0;
ap = 0; // ???
domain = DomainClient; //???
}
TlbEntry()
{}
void
updateVaddr(Addr new_vaddr)
{
vpn = new_vaddr >> PageShift;
}
Addr
pageStart()
{
return pfn << PageShift;
}
bool
match(Addr va, uint8_t cid)
{
Addr v = vpn << N;
if (valid && va >= v && va <= v + size && (global || cid == asid))
return true;
return false;
}
Addr
pAddr(Addr va)
{
return (pfn << N) | (va & size);
}
void serialize(std::ostream &os) { panic("Need to Implement\n"); }
void unserialize(Checkpoint *cp, const std::string §ion)
{ panic("Need to Implement\n");}
};
};
#endif // __ARCH_ARM_PAGETABLE_H__
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