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40 #ifndef __ARCH_X86_TLB_HH__
41 #define __ARCH_X86_TLB_HH__
46 #include "arch/generic/tlb.hh"
47 #include "arch/x86/pagetable.hh"
48 #include "base/trie.hh"
49 #include "mem/request.hh"
50 #include "params/X86TLB.hh"
58 class TLB : public BaseTLB
63 typedef std::list<TlbEntry *> EntryList;
65 uint32_t configAddress;
69 typedef X86TLBParams Params;
72 void takeOverFrom(BaseTLB *otlb) override {}
74 TlbEntry *lookup(Addr va, bool update_lru = true);
76 void setConfigAddress(uint32_t addr);
80 EntryList::iterator lookupIt(Addr va, bool update_lru = true);
87 void flushAll() override;
89 void flushNonGlobal();
91 void demapPage(Addr va, uint64_t asn) override;
96 std::vector<TlbEntry> tlb;
104 Stats::Scalar rdAccesses;
105 Stats::Scalar wrAccesses;
106 Stats::Scalar rdMisses;
107 Stats::Scalar wrMisses;
109 Fault translateInt(const RequestPtr &req, ThreadContext *tc);
111 Fault translate(const RequestPtr &req, ThreadContext *tc,
112 Translation *translation, Mode mode,
113 bool &delayedResponse, bool timing);
125 Fault translateAtomic(
126 const RequestPtr &req, ThreadContext *tc, Mode mode) override;
127 void translateTiming(
128 const RequestPtr &req, ThreadContext *tc,
129 Translation *translation, Mode mode) override;
132 * Do post-translation physical address finalization.
134 * Some addresses, for example requests going to the APIC,
135 * need post-translation updates. Such physical addresses are
136 * remapped into a "magic" part of the physical address space
139 * @param req Request to updated in-place.
140 * @param tc Thread context that created the request.
141 * @param mode Request type (read/write/execute).
142 * @return A fault on failure, NoFault otherwise.
144 Fault finalizePhysical(const RequestPtr &req, ThreadContext *tc,
145 Mode mode) const override;
147 TlbEntry *insert(Addr vpn, const TlbEntry &entry);
150 * Function to register Stats
152 void regStats() override;
155 void serialize(CheckpointOut &cp) const override;
156 void unserialize(CheckpointIn &cp) override;
159 * Get the table walker port. This is used for
160 * migrating port connections during a CPU takeOverFrom()
161 * call. For architectures that do not have a table walker,
162 * NULL is returned, hence the use of a pointer rather than a
163 * reference. For X86 this method will always return a valid
166 * @return A pointer to the walker port
168 Port *getTableWalkerPort() override;
172 #endif // __ARCH_X86_TLB_HH__