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/*
* Copyright (c) 2006 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_SPARC_TLB_HH__
#define __ARCH_SPARC_TLB_HH__
#include "arch/sparc/tlb_map.hh"
#include "base/misc.hh"
#include "mem/request.hh"
#include "sim/faults.hh"
#include "sim/sim_object.hh"
class ThreadContext;
namespace SparcISA
{
class TLB : public SimObject
{
protected:
TlbMap lookupTable;;
typedef TlbMap::iterator MapIter;
TlbEntry *tlb;
int size;
int usedEntries;
enum FaultTypes {
OtherFault = 0,
PrivViolation = 0x1,
SideEffect = 0x2,
AtomicToIo = 0x4,
IllegalAsi = 0x8,
LoadFromNfo = 0x10,
VaOutOfRange = 0x20,
VaOutOfRangeJmp = 0x40
};
enum ContextType {
Primary = 0,
Secondary = 1,
Nucleus = 2
};
/** lookup an entry in the TLB based on the partition id, and real bit if
* real is true or the partition id, and context id if real is false.
* @param va the virtual address not shifted (e.g. bottom 13 bits are 0)
* @param paritition_id partition this entry is for
* @param real is this a real->phys or virt->phys translation
* @param context_id if this is virt->phys what context
* @return A pointer to a tlb entry
*/
TlbEntry *lookup(Addr va, int partition_id, bool real, int context_id = 0);
/** Insert a PTE into the TLB. */
void insert(Addr vpn, int partition_id, int context_id, bool real,
const PageTableEntry& PTE);
/** Given an entry id, read that tlb entries' tag. */
uint64_t TagRead(int entry);
/** Give an entry id, read that tlb entries' tte */
uint64_t TteRead(int entry);
/** Remove all entries from the TLB */
void invalidateAll();
/** Remove all non-locked entries from the tlb that match partition id. */
void demapAll(int partition_id);
/** Remove all entries that match a given context/partition id. */
void demapContext(int partition_id, int context_id);
/** Remve all entries that match a certain partition id, (contextid), and
* va). */
void demapPage(Addr va, int partition_id, bool real, int context_id);
/** Checks if the virtual address provided is a valid one. */
bool validVirtualAddress(Addr va, bool am);
void writeSfsr(ThreadContext *tc, int reg, bool write, ContextType ct,
bool se, FaultTypes ft, int asi);
void TLB::clearUsedBits();
public:
TLB(const std::string &name, int size);
// Checkpointing
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string §ion);
};
class ITB : public TLB
{
public:
ITB(const std::string &name, int size) : TLB(name, size)
{
}
Fault translate(RequestPtr &req, ThreadContext *tc);
private:
void writeSfsr(ThreadContext *tc, bool write, ContextType ct,
bool se, FaultTypes ft, int asi);
};
class DTB : public TLB
{
public:
DTB(const std::string &name, int size) : TLB(name, size)
{
}
Fault translate(RequestPtr &req, ThreadContext *tc, bool write);
private:
void writeSfr(ThreadContext *tc, Addr a, bool write, ContextType ct,
bool se, FaultTypes ft, int asi);
};
}
#endif // __ARCH_SPARC_TLB_HH__
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