1/* 2 * Copyright (c) 2011 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 --- 46 unchanged lines hidden (view full) --- 55 protected: 56 BaseTLB(const Params *p) 57 : SimObject(p) 58 {} 59 60 public: 61 enum Mode { Read, Write, Execute }; 62 |
63 class Translation 64 { 65 public: 66 virtual ~Translation() 67 {} 68 69 /** 70 * Signal that the translation has been delayed due to a hw page table --- 11 unchanged lines hidden (view full) --- 82 83 /** This function is used by the page table walker to determine if it 84 * should translate the a pending request or if the underlying request 85 * has been squashed. 86 * @ return Is the instruction that requested this translation squashed? 87 */ 88 virtual bool squashed() const { return false; } 89 }; |
90 |
91 public: |
92 virtual void demapPage(Addr vaddr, uint64_t asn) = 0; |
93 |
94 virtual Fault translateAtomic( 95 RequestPtr req, ThreadContext *tc, Mode mode) = 0; 96 virtual void translateTiming( 97 RequestPtr req, ThreadContext *tc, 98 Translation *translation, Mode mode) = 0; 99 virtual Fault 100 translateFunctional(RequestPtr req, ThreadContext *tc, Mode mode) 101 { 102 panic("Not implemented.\n"); 103 } |
104 |
105 /** 106 * Do post-translation physical address finalization. 107 * 108 * This method is used by some architectures that need 109 * post-translation massaging of physical addresses. For example, 110 * X86 uses this to remap physical addresses in the APIC range to 111 * a range of physical memory not normally available to real x86 112 * implementations. 113 * 114 * @param req Request to updated in-place. 115 * @param tc Thread context that created the request. 116 * @param mode Request type (read/write/execute). 117 * @return A fault on failure, NoFault otherwise. 118 */ |
119 virtual Fault finalizePhysical( 120 RequestPtr req, ThreadContext *tc, Mode mode) const = 0; 121 122 /** 123 * Remove all entries from the TLB 124 */ 125 virtual void flushAll() = 0; 126 127 /** 128 * Take over from an old tlb context 129 */ 130 virtual void takeOverFrom(BaseTLB *otlb) = 0; 131 132 /** 133 * Get the table walker master port if present. This is used for 134 * migrating port connections during a CPU takeOverFrom() 135 * call. For architectures that do not have a table walker, NULL 136 * is returned, hence the use of a pointer rather than a 137 * reference. 138 * 139 * @return A pointer to the walker master port or NULL if not present 140 */ 141 virtual BaseMasterPort* getMasterPort() { return NULL; } 142 143 void memInvalidate() { flushAll(); } |
144}; 145 |
146class GenericTLB : public BaseTLB 147{ 148 protected: 149 GenericTLB(const Params *p) 150 : BaseTLB(p) 151 {} 152 153 public: 154 void demapPage(Addr vaddr, uint64_t asn) override; 155 156 Fault translateAtomic( 157 RequestPtr req, ThreadContext *tc, Mode mode) override; 158 void translateTiming( 159 RequestPtr req, ThreadContext *tc, 160 Translation *translation, Mode mode) override; 161 162 Fault finalizePhysical( 163 RequestPtr req, ThreadContext *tc, Mode mode) const override; 164}; 165 |
166#endif // __ARCH_GENERIC_TLB_HH__ |