1/*
2 * Copyright (c) 2010-2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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56
57class ThreadContext;
58
59namespace ArmISA {
60
61class TableWalker;
62class Stage2LookUp;
63class Stage2MMU;
64
65class TLB : public BaseTLB
66{
67 public:
68 enum ArmFlags {
69 AlignmentMask = 0x7,
70
71 AlignByte = 0x0,
72 AlignHalfWord = 0x1,

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100 uint64_t _attr; // Memory attributes for last accessed TLB entry
101 bool directToStage2; // Indicates whether all translation requests should
102 // be routed directly to the stage 2 TLB
103
104 TableWalker *tableWalker;
105 TLB *stage2Tlb;
106 Stage2MMU *stage2Mmu;
107
108 // Access Stats
109 mutable Stats::Scalar instHits;
110 mutable Stats::Scalar instMisses;
111 mutable Stats::Scalar readHits;
112 mutable Stats::Scalar readMisses;
113 mutable Stats::Scalar writeHits;
114 mutable Stats::Scalar writeMisses;
115 mutable Stats::Scalar inserts;

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155
156 virtual ~TLB();
157
158 void takeOverFrom(BaseTLB *otlb) override;
159
160 /// setup all the back pointers
161 void init() override;
162
163 TableWalker *getTableWalker() { return tableWalker; }
164
165 void setMMU(Stage2MMU *m, MasterID master_id);
166
167 int getsize() const { return size; }
168
169 void insert(Addr vaddr, TlbEntry &pte);
170

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219
220 /** Remove all entries that match the va regardless of asn
221 * @param mva address to flush from cache
222 * @param secure_lookup if the operation affects the secure world
223 * @param hyp if the operation affects hyp mode
224 */
225 void flushMva(Addr mva, bool secure_lookup, bool hyp, uint8_t target_el);
226
227 Fault trickBoxCheck(RequestPtr req, Mode mode, TlbEntry::DomainType domain);
228 Fault walkTrickBoxCheck(Addr pa, bool is_secure, Addr va, Addr sz, bool is_exec,
229 bool is_write, TlbEntry::DomainType domain, LookupLevel lookup_level);
230
231 void printTlb() const;
232
233 void demapPage(Addr vaddr, uint64_t asn) override
234 {
235 // needed for x86 only
236 panic("demapPage() is not implemented.\n");
237 }
238

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351 * @param secure_lookup if the operation affects the secure world
352 * @param hyp if the operation affects hyp mode
353 * @param ignore_asn if the flush should ignore the asn
354 */
355 void _flushMva(Addr mva, uint64_t asn, bool secure_lookup,
356 bool hyp, bool ignore_asn, uint8_t target_el);
357
358 bool checkELMatch(uint8_t target_el, uint8_t tentry_el, bool ignore_el);
359};
360
361} // namespace ArmISA
362
363#endif // __ARCH_ARM_TLB_HH__