2ac04c11ac
This patch adds explicit overrides as this is now required when using "-Wall" with clang >= 3.5, the latter now part of the most recent XCode. The patch consequently removes "virtual" for those methods where "override" is added. The latter should be enough of an indication. As part of this patch, a few minor issues that clang >= 3.5 complains about are also resolved (unused methods and variables).
157 lines
5 KiB
C++
157 lines
5 KiB
C++
/*
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* Copyright (c) 2001-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Nathan Binkert
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* Steve Reinhardt
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*/
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#ifndef __ARCH_ALPHA_TLB_HH__
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#define __ARCH_ALPHA_TLB_HH__
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#include <map>
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#include "arch/alpha/ev5.hh"
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#include "arch/alpha/isa_traits.hh"
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#include "arch/alpha/pagetable.hh"
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#include "arch/alpha/utility.hh"
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#include "arch/alpha/vtophys.hh"
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#include "arch/generic/tlb.hh"
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#include "base/statistics.hh"
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#include "mem/request.hh"
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#include "params/AlphaTLB.hh"
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class ThreadContext;
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namespace AlphaISA {
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struct TlbEntry;
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class TLB : public BaseTLB
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{
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protected:
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mutable Stats::Scalar fetch_hits;
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mutable Stats::Scalar fetch_misses;
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mutable Stats::Scalar fetch_acv;
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mutable Stats::Formula fetch_accesses;
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mutable Stats::Scalar read_hits;
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mutable Stats::Scalar read_misses;
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mutable Stats::Scalar read_acv;
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mutable Stats::Scalar read_accesses;
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mutable Stats::Scalar write_hits;
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mutable Stats::Scalar write_misses;
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mutable Stats::Scalar write_acv;
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mutable Stats::Scalar write_accesses;
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Stats::Formula data_hits;
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Stats::Formula data_misses;
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Stats::Formula data_acv;
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Stats::Formula data_accesses;
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typedef std::multimap<Addr, int> PageTable;
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PageTable lookupTable; // Quick lookup into page table
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std::vector<TlbEntry> table; // the Page Table
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int nlu; // not last used entry (for replacement)
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void nextnlu() { if (++nlu >= table.size()) nlu = 0; }
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TlbEntry *lookup(Addr vpn, uint8_t asn);
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public:
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typedef AlphaTLBParams Params;
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TLB(const Params *p);
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virtual ~TLB();
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void takeOverFrom(BaseTLB *otlb) override {}
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void regStats() override;
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int getsize() const { return table.size(); }
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TlbEntry &index(bool advance = true);
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void insert(Addr vaddr, TlbEntry &entry);
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void flushAll() override;
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void flushProcesses();
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void flushAddr(Addr addr, uint8_t asn);
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void
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demapPage(Addr vaddr, uint64_t asn) override
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{
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assert(asn < (1 << 8));
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flushAddr(vaddr, asn);
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}
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// static helper functions... really EV5 VM traits
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static bool
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validVirtualAddress(Addr vaddr)
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{
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// unimplemented bits must be all 0 or all 1
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Addr unimplBits = vaddr & VAddrUnImplMask;
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return unimplBits == 0 || unimplBits == VAddrUnImplMask;
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}
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static Fault checkCacheability(RequestPtr &req, bool itb = false);
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// Checkpointing
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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// Most recently used page table entries
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TlbEntry *EntryCache[3];
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inline void
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flushCache()
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{
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memset(EntryCache, 0, 3 * sizeof(TlbEntry*));
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}
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inline TlbEntry *
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updateCache(TlbEntry *entry) {
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EntryCache[2] = EntryCache[1];
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EntryCache[1] = EntryCache[0];
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EntryCache[0] = entry;
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return entry;
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}
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protected:
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Fault translateData(RequestPtr req, ThreadContext *tc, bool write);
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Fault translateInst(RequestPtr req, ThreadContext *tc);
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public:
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Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode);
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void translateTiming(RequestPtr req, ThreadContext *tc,
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Translation *translation, Mode mode);
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/**
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* translateFunctional stub function for future CheckerCPU support
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*/
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Fault translateFunctional(RequestPtr req, ThreadContext *tc, Mode mode);
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Fault finalizePhysical(RequestPtr req, ThreadContext *tc, Mode mode) const;
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};
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} // namespace AlphaISA
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#endif // __ARCH_ALPHA_TLB_HH__
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