tlb.hh (12334:e0ab29a34764) tlb.hh (12406:86bde4a026b5)
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
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 public:
64 virtual void demapPage(Addr vaddr, uint64_t asn) = 0;
65
66 /**
67 * Remove all entries from the TLB
68 */
69 virtual void flushAll() = 0;
70
71 /**
72 * Take over from an old tlb context
73 */
74 virtual void takeOverFrom(BaseTLB *otlb) = 0;
75
76 /**
77 * Get the table walker master port if present. This is used for
78 * migrating port connections during a CPU takeOverFrom()
79 * call. For architectures that do not have a table walker, NULL
80 * is returned, hence the use of a pointer rather than a
81 * reference.
82 *
83 * @return A pointer to the walker master port or NULL if not present
84 */
85 virtual BaseMasterPort* getMasterPort() { return NULL; }
86
87 void memInvalidate() { flushAll(); }
88
89 class Translation
90 {
91 public:
92 virtual ~Translation()
93 {}
94
95 /**
96 * Signal that the translation has been delayed due to a hw page table

--- 11 unchanged lines hidden (view full) ---

108
109 /** This function is used by the page table walker to determine if it
110 * should translate the a pending request or if the underlying request
111 * has been squashed.
112 * @ return Is the instruction that requested this translation squashed?
113 */
114 virtual bool squashed() const { return false; }
115 };
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 };
116};
117
90
118class GenericTLB : public BaseTLB
119{
120 protected:
121 GenericTLB(const Params *p)
122 : BaseTLB(p)
123 {}
124
125 public:
91 public:
126 void demapPage(Addr vaddr, uint64_t asn) override;
92 virtual void demapPage(Addr vaddr, uint64_t asn) = 0;
127
93
128 Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode);
129 void translateTiming(RequestPtr req, ThreadContext *tc,
130 Translation *translation, Mode mode);
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 }
131
104
132
133 /**
134 * Do post-translation physical address finalization.
135 *
136 * This method is used by some architectures that need
137 * post-translation massaging of physical addresses. For example,
138 * X86 uses this to remap physical addresses in the APIC range to
139 * a range of physical memory not normally available to real x86
140 * implementations.
141 *
142 * @param req Request to updated in-place.
143 * @param tc Thread context that created the request.
144 * @param mode Request type (read/write/execute).
145 * @return A fault on failure, NoFault otherwise.
146 */
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 */
147 Fault finalizePhysical(RequestPtr req, ThreadContext *tc, Mode mode) const;
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(); }
148};
149
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
150#endif // __ARCH_GENERIC_TLB_HH__
166#endif // __ARCH_GENERIC_TLB_HH__