1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
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
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 */
39
40#ifndef __ARCH_X86_PAGE_TABLE_WALKER_HH__
41#define __ARCH_X86_PAGE_TABLE_WALKER_HH__
42
43#include <vector>
44
45#include "arch/x86/pagetable.hh"
46#include "arch/x86/tlb.hh"
47#include "base/fast_alloc.hh"
48#include "base/types.hh"
49#include "mem/mem_object.hh"
50#include "mem/packet.hh"
51#include "params/X86PagetableWalker.hh"
52#include "sim/faults.hh"
53#include "sim/system.hh"
54
55class ThreadContext;
56
57namespace X86ISA
58{
59 class Walker : public MemObject
60 {
61 protected:
62 // Port for accessing memory
63 class WalkerPort : public MasterPort
64 {
65 public:
66 WalkerPort(const std::string &_name, Walker * _walker) :
67 MasterPort(_name, _walker), walker(_walker)
68 {}
69
70 protected:
71 Walker *walker;
72
| 1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
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
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 */
39
40#ifndef __ARCH_X86_PAGE_TABLE_WALKER_HH__
41#define __ARCH_X86_PAGE_TABLE_WALKER_HH__
42
43#include <vector>
44
45#include "arch/x86/pagetable.hh"
46#include "arch/x86/tlb.hh"
47#include "base/fast_alloc.hh"
48#include "base/types.hh"
49#include "mem/mem_object.hh"
50#include "mem/packet.hh"
51#include "params/X86PagetableWalker.hh"
52#include "sim/faults.hh"
53#include "sim/system.hh"
54
55class ThreadContext;
56
57namespace X86ISA
58{
59 class Walker : public MemObject
60 {
61 protected:
62 // Port for accessing memory
63 class WalkerPort : public MasterPort
64 {
65 public:
66 WalkerPort(const std::string &_name, Walker * _walker) :
67 MasterPort(_name, _walker), walker(_walker)
68 {}
69
70 protected:
71 Walker *walker;
72
|
73 bool recvTiming(PacketPtr pkt);
| 73 bool recvTimingResp(PacketPtr pkt);
|
74
75 /**
76 * Snooping a coherence request, do nothing.
77 */
| 74
75 /**
76 * Snooping a coherence request, do nothing.
77 */
|
78 bool recvTimingSnoop(PacketPtr pkt) { return true; }
| 78 void recvTimingSnoopReq(PacketPtr pkt) { }
|
79 Tick recvAtomicSnoop(PacketPtr pkt) { return 0; }
80 void recvFunctionalSnoop(PacketPtr pkt) { }
81 void recvRetry();
82 bool isSnooping() const { return true; }
83 };
84
85 friend class WalkerPort;
86 WalkerPort port;
87
88 // State to track each walk of the page table
89 class WalkerState : public FastAlloc
90 {
91 private:
92 enum State {
93 Ready,
94 Waiting,
95 // Long mode
96 LongPML4, LongPDP, LongPD, LongPTE,
97 // PAE legacy mode
98 PAEPDP, PAEPD, PAEPTE,
99 // Non PAE legacy mode with and without PSE
100 PSEPD, PD, PTE
101 };
102
103 protected:
104 Walker *walker;
105 ThreadContext *tc;
106 RequestPtr req;
107 State state;
108 State nextState;
109 int dataSize;
110 bool enableNX;
111 unsigned inflight;
112 TlbEntry entry;
113 PacketPtr read;
114 std::vector<PacketPtr> writes;
115 Fault timingFault;
116 TLB::Translation * translation;
117 BaseTLB::Mode mode;
118 bool functional;
119 bool timing;
120 bool retrying;
121 bool started;
122 public:
123 WalkerState(Walker * _walker, BaseTLB::Translation *_translation,
124 RequestPtr _req, bool _isFunctional = false) :
125 walker(_walker), req(_req), state(Ready),
126 nextState(Ready), inflight(0),
127 translation(_translation),
128 functional(_isFunctional), timing(false),
129 retrying(false), started(false)
130 {
131 }
132 void initState(ThreadContext * _tc, BaseTLB::Mode _mode,
133 bool _isTiming = false);
134 Fault startWalk();
135 Fault startFunctional(Addr &addr, unsigned &logBytes);
136 bool recvPacket(PacketPtr pkt);
137 bool isRetrying();
138 bool wasStarted();
139 bool isTiming();
140 void retry();
141 std::string name() const {return walker->name();}
142
143 private:
144 void setupWalk(Addr vaddr);
145 Fault stepWalk(PacketPtr &write);
146 void sendPackets();
147 void endWalk();
148 Fault pageFault(bool present);
149 };
150
151 friend class WalkerState;
152 // State for timing and atomic accesses (need multiple per walker in
153 // the case of multiple outstanding requests in timing mode)
154 std::list<WalkerState *> currStates;
155 // State for functional accesses (only need one of these per walker)
156 WalkerState funcState;
157
158 struct WalkerSenderState : public Packet::SenderState
159 {
160 WalkerState * senderWalk;
161 Packet::SenderState * saved;
162 WalkerSenderState(WalkerState * _senderWalk,
163 Packet::SenderState * _saved) :
164 senderWalk(_senderWalk), saved(_saved) {}
165 };
166
167 public:
168 // Kick off the state machine.
169 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
170 RequestPtr req, BaseTLB::Mode mode);
171 Fault startFunctional(ThreadContext * _tc, Addr &addr,
172 unsigned &logBytes, BaseTLB::Mode mode);
173 MasterPort &getMasterPort(const std::string &if_name, int idx = -1);
174
175 protected:
176 // The TLB we're supposed to load.
177 TLB * tlb;
178 System * sys;
179 MasterID masterId;
180
181 // Functions for dealing with packets.
| 79 Tick recvAtomicSnoop(PacketPtr pkt) { return 0; }
80 void recvFunctionalSnoop(PacketPtr pkt) { }
81 void recvRetry();
82 bool isSnooping() const { return true; }
83 };
84
85 friend class WalkerPort;
86 WalkerPort port;
87
88 // State to track each walk of the page table
89 class WalkerState : public FastAlloc
90 {
91 private:
92 enum State {
93 Ready,
94 Waiting,
95 // Long mode
96 LongPML4, LongPDP, LongPD, LongPTE,
97 // PAE legacy mode
98 PAEPDP, PAEPD, PAEPTE,
99 // Non PAE legacy mode with and without PSE
100 PSEPD, PD, PTE
101 };
102
103 protected:
104 Walker *walker;
105 ThreadContext *tc;
106 RequestPtr req;
107 State state;
108 State nextState;
109 int dataSize;
110 bool enableNX;
111 unsigned inflight;
112 TlbEntry entry;
113 PacketPtr read;
114 std::vector<PacketPtr> writes;
115 Fault timingFault;
116 TLB::Translation * translation;
117 BaseTLB::Mode mode;
118 bool functional;
119 bool timing;
120 bool retrying;
121 bool started;
122 public:
123 WalkerState(Walker * _walker, BaseTLB::Translation *_translation,
124 RequestPtr _req, bool _isFunctional = false) :
125 walker(_walker), req(_req), state(Ready),
126 nextState(Ready), inflight(0),
127 translation(_translation),
128 functional(_isFunctional), timing(false),
129 retrying(false), started(false)
130 {
131 }
132 void initState(ThreadContext * _tc, BaseTLB::Mode _mode,
133 bool _isTiming = false);
134 Fault startWalk();
135 Fault startFunctional(Addr &addr, unsigned &logBytes);
136 bool recvPacket(PacketPtr pkt);
137 bool isRetrying();
138 bool wasStarted();
139 bool isTiming();
140 void retry();
141 std::string name() const {return walker->name();}
142
143 private:
144 void setupWalk(Addr vaddr);
145 Fault stepWalk(PacketPtr &write);
146 void sendPackets();
147 void endWalk();
148 Fault pageFault(bool present);
149 };
150
151 friend class WalkerState;
152 // State for timing and atomic accesses (need multiple per walker in
153 // the case of multiple outstanding requests in timing mode)
154 std::list<WalkerState *> currStates;
155 // State for functional accesses (only need one of these per walker)
156 WalkerState funcState;
157
158 struct WalkerSenderState : public Packet::SenderState
159 {
160 WalkerState * senderWalk;
161 Packet::SenderState * saved;
162 WalkerSenderState(WalkerState * _senderWalk,
163 Packet::SenderState * _saved) :
164 senderWalk(_senderWalk), saved(_saved) {}
165 };
166
167 public:
168 // Kick off the state machine.
169 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
170 RequestPtr req, BaseTLB::Mode mode);
171 Fault startFunctional(ThreadContext * _tc, Addr &addr,
172 unsigned &logBytes, BaseTLB::Mode mode);
173 MasterPort &getMasterPort(const std::string &if_name, int idx = -1);
174
175 protected:
176 // The TLB we're supposed to load.
177 TLB * tlb;
178 System * sys;
179 MasterID masterId;
180
181 // Functions for dealing with packets.
|
182 bool recvTiming(PacketPtr pkt);
| 182 bool recvTimingResp(PacketPtr pkt);
|
183 void recvRetry();
184 bool sendTiming(WalkerState * sendingState, PacketPtr pkt);
185
186 public:
187
188 void setTLB(TLB * _tlb)
189 {
190 tlb = _tlb;
191 }
192
193 typedef X86PagetableWalkerParams Params;
194
195 const Params *
196 params() const
197 {
198 return static_cast<const Params *>(_params);
199 }
200
201 Walker(const Params *params) :
202 MemObject(params), port(name() + ".port", this),
203 funcState(this, NULL, NULL, true), tlb(NULL), sys(params->system),
204 masterId(sys->getMasterId(name()))
205 {
206 }
207 };
208}
209#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
| 183 void recvRetry();
184 bool sendTiming(WalkerState * sendingState, PacketPtr pkt);
185
186 public:
187
188 void setTLB(TLB * _tlb)
189 {
190 tlb = _tlb;
191 }
192
193 typedef X86PagetableWalkerParams Params;
194
195 const Params *
196 params() const
197 {
198 return static_cast<const Params *>(_params);
199 }
200
201 Walker(const Params *params) :
202 MemObject(params), port(name() + ".port", this),
203 funcState(this, NULL, NULL, true), tlb(NULL), sys(params->system),
204 masterId(sys->getMasterId(name()))
205 {
206 }
207 };
208}
209#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
|