tlb.hh (5242:280a99136427) tlb.hh (5245:d94bb8af9f76)
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *

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72#include "sim/faults.hh"
73#include "sim/sim_object.hh"
74
75class ThreadContext;
76class Packet;
77
78namespace X86ISA
79{
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *

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72#include "sim/faults.hh"
73#include "sim/sim_object.hh"
74
75class ThreadContext;
76class Packet;
77
78namespace X86ISA
79{
80 class Walker;
81
80 static const unsigned StoreCheck = 1 << NUM_SEGMENTREGS;
81
82 class TLB;
83
82 static const unsigned StoreCheck = 1 << NUM_SEGMENTREGS;
83
84 class TLB;
85
84 class TLB : public MemObject
86 class TLB : public SimObject
85 {
86 protected:
87 friend class FakeITLBFault;
88 friend class FakeDTLBFault;
89
87 {
88 protected:
89 friend class FakeITLBFault;
90 friend class FakeDTLBFault;
91
90 System * sys;
92 bool _allowNX;
91
93
92 bool allowNX;
93
94 public:
94 public:
95 bool allowNX() const
96 {
97 return _allowNX;
98 }
99
95 typedef X86TLBParams Params;
96 TLB(const Params *p);
97
98 void dumpAll();
99
100 TlbEntry *lookup(Addr va, bool update_lru = true);
101
102#if FULL_SYSTEM
103 protected:
100 typedef X86TLBParams Params;
101 TLB(const Params *p);
102
103 void dumpAll();
104
105 TlbEntry *lookup(Addr va, bool update_lru = true);
106
107#if FULL_SYSTEM
108 protected:
104 class Walker
105 {
106 public:
107 enum State {
108 Ready,
109 Waiting,
110 LongPML4,
111 LongPDP,
112 LongPD,
113 LongPTE,
114 PAEPDP,
115 PAEPD,
116 PAEPTE,
117 PSEPD,
118 PD,
119 PTE
120 };
121
109
122 // Act on the current state and determine what to do next. read
123 // should be the packet that just came back from a read and write
124 // should be NULL. When the function returns, read is either NULL
125 // if the machine is finished, or points to a packet to initiate
126 // the next read. If any write is required to update an "accessed"
127 // bit, write will point to a packet to do the write. Otherwise it
128 // will be NULL.
129 void doNext(PacketPtr &read, PacketPtr &write);
110 Walker * walker;
130
111
131 // Kick off the state machine.
132 void start(ThreadContext * _tc, Addr vaddr);
133
134 protected:
135 friend class TLB;
136
137 /*
138 * State having to do with sending packets.
139 */
140 PacketPtr read;
141 std::vector<PacketPtr> writes;
142
143 // How many memory operations are in flight.
144 unsigned inflight;
145
146 bool retrying;
147
148 /*
149 * Functions for dealing with packets.
150 */
151 bool recvTiming(PacketPtr pkt);
152 void recvRetry();
153
154 void sendPackets();
155
156 /*
157 * Port for accessing memory
158 */
159 class WalkerPort : public Port
160 {
161 public:
162 WalkerPort(const std::string &_name, Walker * _walker) :
163 Port(_name, _walker->tlb), walker(_walker),
164 snoopRangeSent(false)
165 {}
166
167 protected:
168 Walker * walker;
169
170 bool snoopRangeSent;
171
172 bool recvTiming(PacketPtr pkt);
173 Tick recvAtomic(PacketPtr pkt);
174 void recvFunctional(PacketPtr pkt);
175 void recvStatusChange(Status status);
176 void recvRetry();
177 void getDeviceAddressRanges(AddrRangeList &resp,
178 bool &snoop)
179 {
180 resp.clear();
181 snoop = true;
182 }
183 };
184
185 friend class WalkerPort;
186
187 WalkerPort port;
188
189 // The TLB we're supposed to load.
190 TLB * tlb;
191
192 /*
193 * State machine state.
194 */
195 ThreadContext * tc;
196 State state;
197 State nextState;
198 int size;
199 bool enableNX;
200 TlbEntry entry;
201
202 public:
203 Walker(const std::string &_name, TLB * _tlb) :
204 read(NULL), inflight(0), retrying(false),
205 port(_name + "-walker_port", this),
206 tlb(_tlb),
207 tc(NULL), state(Ready), nextState(Ready)
208 {
209 }
210 };
211
212 Walker walker;
213
112 void walk(ThreadContext * _tc, Addr vaddr);
214#endif
215
113#endif
114
216 Port *getPort(const std::string &if_name, int idx = -1);
217
218 public:
219 void invalidateAll();
220
221 void invalidateNonGlobal();
222
223 void demapPage(Addr va);
224
225 protected:
226 int size;
227
228 TlbEntry * tlb;
229
230 typedef std::list<TlbEntry *> EntryList;
231 EntryList freeList;
232 EntryList entryList;
233
115 public:
116 void invalidateAll();
117
118 void invalidateNonGlobal();
119
120 void demapPage(Addr va);
121
122 protected:
123 int size;
124
125 TlbEntry * tlb;
126
127 typedef std::list<TlbEntry *> EntryList;
128 EntryList freeList;
129 EntryList entryList;
130
234 void insert(Addr vpn, TlbEntry &entry);
235
236 template<class TlbFault>
237 Fault translate(RequestPtr &req, ThreadContext *tc,
238 bool write, bool execute);
239
240 public:
131 template<class TlbFault>
132 Fault translate(RequestPtr &req, ThreadContext *tc,
133 bool write, bool execute);
134
135 public:
136
137 void insert(Addr vpn, TlbEntry &entry);
138
241 // Checkpointing
242 virtual void serialize(std::ostream &os);
243 virtual void unserialize(Checkpoint *cp, const std::string &section);
244 };
245
246 class ITB : public TLB
247 {
248 public:
249 typedef X86ITBParams Params;
250 ITB(const Params *p) : TLB(p)
251 {
139 // Checkpointing
140 virtual void serialize(std::ostream &os);
141 virtual void unserialize(Checkpoint *cp, const std::string &section);
142 };
143
144 class ITB : public TLB
145 {
146 public:
147 typedef X86ITBParams Params;
148 ITB(const Params *p) : TLB(p)
149 {
252 sys = p->system;
253 allowNX = false;
150 _allowNX = false;
254 }
255
256 Fault translate(RequestPtr &req, ThreadContext *tc);
257
258 friend class DTB;
259 };
260
261 class DTB : public TLB
262 {
263 public:
264 typedef X86DTBParams Params;
265 DTB(const Params *p) : TLB(p)
266 {
151 }
152
153 Fault translate(RequestPtr &req, ThreadContext *tc);
154
155 friend class DTB;
156 };
157
158 class DTB : public TLB
159 {
160 public:
161 typedef X86DTBParams Params;
162 DTB(const Params *p) : TLB(p)
163 {
267 sys = p->system;
268 allowNX = true;
164 _allowNX = true;
269 }
270 Fault translate(RequestPtr &req, ThreadContext *tc, bool write);
271#if FULL_SYSTEM
272 Tick doMmuRegRead(ThreadContext *tc, Packet *pkt);
273 Tick doMmuRegWrite(ThreadContext *tc, Packet *pkt);
274#endif
275
276 // Checkpointing
277 virtual void serialize(std::ostream &os);
278 virtual void unserialize(Checkpoint *cp, const std::string &section);
279 };
280}
281
282#endif // __ARCH_X86_TLB_HH__
165 }
166 Fault translate(RequestPtr &req, ThreadContext *tc, bool write);
167#if FULL_SYSTEM
168 Tick doMmuRegRead(ThreadContext *tc, Packet *pkt);
169 Tick doMmuRegWrite(ThreadContext *tc, Packet *pkt);
170#endif
171
172 // Checkpointing
173 virtual void serialize(std::ostream &os);
174 virtual void unserialize(Checkpoint *cp, const std::string &section);
175 };
176}
177
178#endif // __ARCH_X86_TLB_HH__