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 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary
11 * compensation for, or commercial advantage from such use. Illustrative
12 * examples of non-commercial use are academic research, personal study,
13 * teaching, education and corporate research & development.
14 * Illustrative examples of commercial use are distributing products for
15 * commercial advantage and providing services using the software for
16 * commercial advantage.
17 *
18 * If you wish to use this software or functionality therein that may be
19 * covered by patents for commercial use, please contact:
20 * Director of Intellectual Property Licensing
21 * Office of Strategy and Technology
22 * Hewlett-Packard Company
23 * 1501 Page Mill Road
24 * Palo Alto, California 94304
25 *
26 * Redistributions of source code must retain the above copyright notice,
27 * this list of conditions and the following disclaimer. Redistributions
28 * in binary form must reproduce the above copyright notice, this list of
29 * conditions and the following disclaimer in the documentation and/or
30 * other materials provided with the distribution. Neither the name of
31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
32 * contributors may be used to endorse or promote products derived from
33 * this software without specific prior written permission. No right of
34 * sublicense is granted herewith. Derivatives of the software and
35 * output created using the software may be prepared, but only for
36 * Non-Commercial Uses. Derivatives of the software may be shared with
37 * others provided: (i) the others agree to abide by the list of
38 * conditions herein which includes the Non-Commercial Use restrictions;
39 * and (ii) such Derivatives of the software include the above copyright
40 * notice to acknowledge the contribution from this software where
41 * applicable, this list of conditions and the disclaimer below.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *
55 * Authors: Gabe Black
56 */
57
58#ifndef __ARCH_X86_TLB_HH__
59#define __ARCH_X86_TLB_HH__
60
61#include <list>
62#include <vector>
63#include <string>
64
65#include "arch/x86/pagetable.hh"
66#include "arch/x86/segmentregs.hh"
67#include "config/full_system.hh"
68#include "mem/mem_object.hh"
69#include "mem/request.hh"
70#include "params/X86DTB.hh"
71#include "params/X86ITB.hh"
72#include "sim/faults.hh"
73#include "sim/sim_object.hh"
74
75class ThreadContext;
76class Packet;
77
78namespace X86ISA
79{
80 static const unsigned StoreCheck = 1 << NUM_SEGMENTREGS;
81
82 class TLB;
83
84 class TLB : public MemObject
85 {
86 protected:
87 friend class FakeITLBFault;
88 friend class FakeDTLBFault;
89
90 System * sys;
91
92 bool allowNX;
93
94 public:
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:
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
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);
130
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
214#endif
215
216 Port *getPort(const std::string &if_name, int idx = -1);
217
| 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 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary
11 * compensation for, or commercial advantage from such use. Illustrative
12 * examples of non-commercial use are academic research, personal study,
13 * teaching, education and corporate research & development.
14 * Illustrative examples of commercial use are distributing products for
15 * commercial advantage and providing services using the software for
16 * commercial advantage.
17 *
18 * If you wish to use this software or functionality therein that may be
19 * covered by patents for commercial use, please contact:
20 * Director of Intellectual Property Licensing
21 * Office of Strategy and Technology
22 * Hewlett-Packard Company
23 * 1501 Page Mill Road
24 * Palo Alto, California 94304
25 *
26 * Redistributions of source code must retain the above copyright notice,
27 * this list of conditions and the following disclaimer. Redistributions
28 * in binary form must reproduce the above copyright notice, this list of
29 * conditions and the following disclaimer in the documentation and/or
30 * other materials provided with the distribution. Neither the name of
31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
32 * contributors may be used to endorse or promote products derived from
33 * this software without specific prior written permission. No right of
34 * sublicense is granted herewith. Derivatives of the software and
35 * output created using the software may be prepared, but only for
36 * Non-Commercial Uses. Derivatives of the software may be shared with
37 * others provided: (i) the others agree to abide by the list of
38 * conditions herein which includes the Non-Commercial Use restrictions;
39 * and (ii) such Derivatives of the software include the above copyright
40 * notice to acknowledge the contribution from this software where
41 * applicable, this list of conditions and the disclaimer below.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *
55 * Authors: Gabe Black
56 */
57
58#ifndef __ARCH_X86_TLB_HH__
59#define __ARCH_X86_TLB_HH__
60
61#include <list>
62#include <vector>
63#include <string>
64
65#include "arch/x86/pagetable.hh"
66#include "arch/x86/segmentregs.hh"
67#include "config/full_system.hh"
68#include "mem/mem_object.hh"
69#include "mem/request.hh"
70#include "params/X86DTB.hh"
71#include "params/X86ITB.hh"
72#include "sim/faults.hh"
73#include "sim/sim_object.hh"
74
75class ThreadContext;
76class Packet;
77
78namespace X86ISA
79{
80 static const unsigned StoreCheck = 1 << NUM_SEGMENTREGS;
81
82 class TLB;
83
84 class TLB : public MemObject
85 {
86 protected:
87 friend class FakeITLBFault;
88 friend class FakeDTLBFault;
89
90 System * sys;
91
92 bool allowNX;
93
94 public:
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:
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
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);
130
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
214#endif
215
216 Port *getPort(const std::string &if_name, int idx = -1);
217
|
235 template<class TlbFault>
236 Fault translate(RequestPtr &req, ThreadContext *tc,
237 bool write, bool execute);
238
239 public:
240 // Checkpointing
241 virtual void serialize(std::ostream &os);
242 virtual void unserialize(Checkpoint *cp, const std::string §ion);
243 };
244
245 class ITB : public TLB
246 {
247 public:
248 typedef X86ITBParams Params;
249 ITB(const Params *p) : TLB(p)
250 {
251 sys = p->system;
252 allowNX = false;
253 }
254
255 Fault translate(RequestPtr &req, ThreadContext *tc);
256
257 friend class DTB;
258 };
259
260 class DTB : public TLB
261 {
262 public:
263 typedef X86DTBParams Params;
264 DTB(const Params *p) : TLB(p)
265 {
266 sys = p->system;
267 allowNX = true;
268 }
269 Fault translate(RequestPtr &req, ThreadContext *tc, bool write);
270#if FULL_SYSTEM
271 Tick doMmuRegRead(ThreadContext *tc, Packet *pkt);
272 Tick doMmuRegWrite(ThreadContext *tc, Packet *pkt);
273#endif
274
275 // Checkpointing
276 virtual void serialize(std::ostream &os);
277 virtual void unserialize(Checkpoint *cp, const std::string §ion);
278 };
279}
280
281#endif // __ARCH_X86_TLB_HH__
| 236 template<class TlbFault>
237 Fault translate(RequestPtr &req, ThreadContext *tc,
238 bool write, bool execute);
239
240 public:
241 // Checkpointing
242 virtual void serialize(std::ostream &os);
243 virtual void unserialize(Checkpoint *cp, const std::string §ion);
244 };
245
246 class ITB : public TLB
247 {
248 public:
249 typedef X86ITBParams Params;
250 ITB(const Params *p) : TLB(p)
251 {
252 sys = p->system;
253 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 {
267 sys = p->system;
268 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 §ion);
279 };
280}
281
282#endif // __ARCH_X86_TLB_HH__
|