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"
| 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"
|
53
54class ThreadContext;
55
56namespace X86ISA
57{
58 class Walker : public MemObject
59 {
60 protected:
61 // Port for accessing memory
62 class WalkerPort : public Port
63 {
64 public:
65 WalkerPort(const std::string &_name, Walker * _walker) :
66 Port(_name, _walker), walker(_walker)
67 {}
68
69 protected:
| 54
55class ThreadContext;
56
57namespace X86ISA
58{
59 class Walker : public MemObject
60 {
61 protected:
62 // Port for accessing memory
63 class WalkerPort : public Port
64 {
65 public:
66 WalkerPort(const std::string &_name, Walker * _walker) :
67 Port(_name, _walker), walker(_walker)
68 {}
69
70 protected:
|
70 Walker * walker;
| 71 Walker *walker;
|
71
72 bool recvTiming(PacketPtr pkt);
73 Tick recvAtomic(PacketPtr pkt);
74 void recvFunctional(PacketPtr pkt);
75 void recvRangeChange();
76 void recvRetry();
77 bool isSnooping() { return true; }
78 };
79
80 friend class WalkerPort;
81 WalkerPort port;
82 Port *getPort(const std::string &if_name, int idx = -1);
83
84 // State to track each walk of the page table
85 class WalkerState : public FastAlloc
86 {
87 private:
88 enum State {
89 Ready,
90 Waiting,
91 // Long mode
92 LongPML4, LongPDP, LongPD, LongPTE,
93 // PAE legacy mode
94 PAEPDP, PAEPD, PAEPTE,
95 // Non PAE legacy mode with and without PSE
96 PSEPD, PD, PTE
97 };
98
99 protected:
| 72
73 bool recvTiming(PacketPtr pkt);
74 Tick recvAtomic(PacketPtr pkt);
75 void recvFunctional(PacketPtr pkt);
76 void recvRangeChange();
77 void recvRetry();
78 bool isSnooping() { return true; }
79 };
80
81 friend class WalkerPort;
82 WalkerPort port;
83 Port *getPort(const std::string &if_name, int idx = -1);
84
85 // State to track each walk of the page table
86 class WalkerState : public FastAlloc
87 {
88 private:
89 enum State {
90 Ready,
91 Waiting,
92 // Long mode
93 LongPML4, LongPDP, LongPD, LongPTE,
94 // PAE legacy mode
95 PAEPDP, PAEPD, PAEPTE,
96 // Non PAE legacy mode with and without PSE
97 PSEPD, PD, PTE
98 };
99
100 protected:
|
100 Walker * walker;
| 101 Walker *walker;
|
101 ThreadContext *tc;
102 RequestPtr req;
103 State state;
104 State nextState;
105 int dataSize;
106 bool enableNX;
107 unsigned inflight;
108 TlbEntry entry;
109 PacketPtr read;
110 std::vector<PacketPtr> writes;
111 Fault timingFault;
112 TLB::Translation * translation;
113 BaseTLB::Mode mode;
114 bool functional;
115 bool timing;
116 bool retrying;
117 bool started;
| 102 ThreadContext *tc;
103 RequestPtr req;
104 State state;
105 State nextState;
106 int dataSize;
107 bool enableNX;
108 unsigned inflight;
109 TlbEntry entry;
110 PacketPtr read;
111 std::vector<PacketPtr> writes;
112 Fault timingFault;
113 TLB::Translation * translation;
114 BaseTLB::Mode mode;
115 bool functional;
116 bool timing;
117 bool retrying;
118 bool started;
|
118
| |
119 public:
120 WalkerState(Walker * _walker, BaseTLB::Translation *_translation,
121 RequestPtr _req, bool _isFunctional = false) :
122 walker(_walker), req(_req), state(Ready),
123 nextState(Ready), inflight(0),
124 translation(_translation),
125 functional(_isFunctional), timing(false),
126 retrying(false), started(false)
127 {
128 }
129 void initState(ThreadContext * _tc, BaseTLB::Mode _mode,
130 bool _isTiming = false);
131 Fault startWalk();
132 Fault startFunctional(Addr &addr, Addr &pageSize);
133 bool recvPacket(PacketPtr pkt);
134 bool isRetrying();
135 bool wasStarted();
136 bool isTiming();
137 void retry();
138 std::string name() const {return walker->name();}
139
140 private:
141 void setupWalk(Addr vaddr);
142 Fault stepWalk(PacketPtr &write);
143 void sendPackets();
144 void endWalk();
145 Fault pageFault(bool present);
146 };
147
148 friend class WalkerState;
149 // State for timing and atomic accesses (need multiple per walker in
150 // the case of multiple outstanding requests in timing mode)
151 std::list<WalkerState *> currStates;
152 // State for functional accesses (only need one of these per walker)
153 WalkerState funcState;
154
155 struct WalkerSenderState : public Packet::SenderState
156 {
157 WalkerState * senderWalk;
158 Packet::SenderState * saved;
159 WalkerSenderState(WalkerState * _senderWalk,
160 Packet::SenderState * _saved) :
161 senderWalk(_senderWalk), saved(_saved) {}
162 };
163
164 public:
165 // Kick off the state machine.
166 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
167 RequestPtr req, BaseTLB::Mode mode);
168 Fault startFunctional(ThreadContext * _tc, Addr &addr,
169 Addr &pageSize, BaseTLB::Mode mode);
170
171 protected:
172 // The TLB we're supposed to load.
173 TLB * tlb;
174 System * sys;
| 119 public:
120 WalkerState(Walker * _walker, BaseTLB::Translation *_translation,
121 RequestPtr _req, bool _isFunctional = false) :
122 walker(_walker), req(_req), state(Ready),
123 nextState(Ready), inflight(0),
124 translation(_translation),
125 functional(_isFunctional), timing(false),
126 retrying(false), started(false)
127 {
128 }
129 void initState(ThreadContext * _tc, BaseTLB::Mode _mode,
130 bool _isTiming = false);
131 Fault startWalk();
132 Fault startFunctional(Addr &addr, Addr &pageSize);
133 bool recvPacket(PacketPtr pkt);
134 bool isRetrying();
135 bool wasStarted();
136 bool isTiming();
137 void retry();
138 std::string name() const {return walker->name();}
139
140 private:
141 void setupWalk(Addr vaddr);
142 Fault stepWalk(PacketPtr &write);
143 void sendPackets();
144 void endWalk();
145 Fault pageFault(bool present);
146 };
147
148 friend class WalkerState;
149 // State for timing and atomic accesses (need multiple per walker in
150 // the case of multiple outstanding requests in timing mode)
151 std::list<WalkerState *> currStates;
152 // State for functional accesses (only need one of these per walker)
153 WalkerState funcState;
154
155 struct WalkerSenderState : public Packet::SenderState
156 {
157 WalkerState * senderWalk;
158 Packet::SenderState * saved;
159 WalkerSenderState(WalkerState * _senderWalk,
160 Packet::SenderState * _saved) :
161 senderWalk(_senderWalk), saved(_saved) {}
162 };
163
164 public:
165 // Kick off the state machine.
166 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
167 RequestPtr req, BaseTLB::Mode mode);
168 Fault startFunctional(ThreadContext * _tc, Addr &addr,
169 Addr &pageSize, BaseTLB::Mode mode);
170
171 protected:
172 // The TLB we're supposed to load.
173 TLB * tlb;
174 System * sys;
|
| 175 MasterID masterId;
|
175
176 // Functions for dealing with packets.
177 bool recvTiming(PacketPtr pkt);
178 void recvRetry();
179 bool sendTiming(WalkerState * sendingState, PacketPtr pkt);
180
181 public:
182
183 void setTLB(TLB * _tlb)
184 {
185 tlb = _tlb;
186 }
187
188 typedef X86PagetableWalkerParams Params;
189
| 176
177 // Functions for dealing with packets.
178 bool recvTiming(PacketPtr pkt);
179 void recvRetry();
180 bool sendTiming(WalkerState * sendingState, PacketPtr pkt);
181
182 public:
183
184 void setTLB(TLB * _tlb)
185 {
186 tlb = _tlb;
187 }
188
189 typedef X86PagetableWalkerParams Params;
190
|
| 191 const Params *
192 params() const
193 {
194 return static_cast<const Params *>(_params);
195 }
196
|
190 Walker(const Params *params) :
191 MemObject(params), port(name() + ".port", this),
| 197 Walker(const Params *params) :
198 MemObject(params), port(name() + ".port", this),
|
192 funcState(this, NULL, NULL, true), tlb(NULL), sys(params->system)
| 199 funcState(this, NULL, NULL, true), tlb(NULL), sys(params->system),
200 masterId(sys->getMasterId(name()))
|
193 {
194 }
195 };
196}
197#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
| 201 {
202 }
203 };
204}
205#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
|