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Diffstat (limited to 'src/arch/power/tlb.hh')
| -rw-r--r-- | src/arch/power/tlb.hh | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/arch/power/tlb.hh b/src/arch/power/tlb.hh new file mode 100644 index 000000000..8b6c7233d --- /dev/null +++ b/src/arch/power/tlb.hh @@ -0,0 +1,171 @@ +/* + * Copyright (c) 2001-2005 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 + * Stephen Hines + * Timothy M. Jones + */ + +#ifndef __ARCH_POWER_TLB_HH__ +#define __ARCH_POWER_TLB_HH__ + +#include <map> + +#include "arch/power/isa_traits.hh" +#include "arch/power/utility.hh" +#include "arch/power/vtophys.hh" +#include "arch/power/pagetable.hh" +#include "base/statistics.hh" +#include "mem/request.hh" +#include "params/PowerTLB.hh" +#include "sim/faults.hh" +#include "sim/tlb.hh" + +class ThreadContext; + +namespace PowerISA { + +// This is copied from the ARM ISA and has not been checked against the +// Power at all. +struct TlbEntry +{ + Addr _pageStart; + + TlbEntry() + { + } + + TlbEntry(Addr asn, Addr vaddr, Addr paddr) + : _pageStart(paddr) + { + } + + void + updateVaddr(Addr new_vaddr) + { + panic("unimplemented"); + } + + Addr + pageStart() + { + return _pageStart; + } + + void + serialize(std::ostream &os) + { + SERIALIZE_SCALAR(_pageStart); + } + + void + unserialize(Checkpoint *cp, const std::string §ion) + { + UNSERIALIZE_SCALAR(_pageStart); + } +}; + +class TLB : public BaseTLB +{ + protected: + typedef std::multimap<Addr, int> PageTable; + PageTable lookupTable; // Quick lookup into page table + + PowerISA::PTE *table; // the Page Table + int size; // TLB Size + int nlu; // not last used entry (for replacement) + + void + nextnlu() + { + if (++nlu >= size) { + nlu = 0; + } + } + + PowerISA::PTE *lookup(Addr vpn, uint8_t asn) const; + + mutable Stats::Scalar read_hits; + mutable Stats::Scalar read_misses; + mutable Stats::Scalar read_acv; + mutable Stats::Scalar read_accesses; + mutable Stats::Scalar write_hits; + mutable Stats::Scalar write_misses; + mutable Stats::Scalar write_acv; + mutable Stats::Scalar write_accesses; + Stats::Formula hits; + Stats::Formula misses; + Stats::Formula invalids; + Stats::Formula accesses; + + public: + typedef PowerTLBParams Params; + TLB(const Params *p); + virtual ~TLB(); + + int probeEntry(Addr vpn,uint8_t) const; + PowerISA::PTE *getEntry(unsigned) const; + + int smallPages; + + int + getsize() const + { + return size; + } + + PowerISA::PTE &index(bool advance = true); + void insert(Addr vaddr, PowerISA::PTE &pte); + void insertAt(PowerISA::PTE &pte, unsigned Index, int _smallPages); + void flushAll(); + + void + demapPage(Addr vaddr, uint64_t asn) + { + panic("demapPage unimplemented.\n"); + } + + // static helper functions... really + static bool validVirtualAddress(Addr vaddr); + static Fault checkCacheability(RequestPtr &req); + Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode); + void translateTiming(RequestPtr req, ThreadContext *tc, + Translation *translation, Mode mode); + + // Checkpointing + void serialize(std::ostream &os); + void unserialize(Checkpoint *cp, const std::string §ion); + void regStats(); +}; + +} // PowerISA namespace + +#endif // __ARCH_POWER_TLB_HH__ |