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_PAGE_TABLE_WALKER_HH__
59#define __ARCH_X86_PAGE_TABLE_WALKER_HH__
60
61#include <vector>
62
63#include "arch/x86/pagetable.hh"
64#include "arch/x86/tlb.hh"
65#include "mem/mem_object.hh"
66#include "mem/packet.hh"
67#include "params/X86PagetableWalker.hh"
68#include "sim/host.hh"
69
70class ThreadContext;
71
72namespace X86ISA
73{
74 class Walker : public MemObject
75 {
76 public:
77 enum State {
78 Ready,
79 Waiting,
80 // Long mode
81 LongPML4, LongPDP, LongPD, LongPTE,
82 // PAE legacy mode
83 PAEPDP, PAEPD, PAEPTE,
84 // Non PAE legacy mode with and without PSE
85 PSEPD, PD, PTE
86 };
87
88 // Act on the current state and determine what to do next. read
89 // should be the packet that just came back from a read and write
90 // should be NULL. When the function returns, read is either NULL
91 // if the machine is finished, or points to a packet to initiate
92 // the next read. If any write is required to update an "accessed"
93 // bit, write will point to a packet to do the write. Otherwise it
94 // will be NULL.
95 void doNext(PacketPtr &read, PacketPtr &write);
96
97 // Kick off the state machine.
| 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_PAGE_TABLE_WALKER_HH__
59#define __ARCH_X86_PAGE_TABLE_WALKER_HH__
60
61#include <vector>
62
63#include "arch/x86/pagetable.hh"
64#include "arch/x86/tlb.hh"
65#include "mem/mem_object.hh"
66#include "mem/packet.hh"
67#include "params/X86PagetableWalker.hh"
68#include "sim/host.hh"
69
70class ThreadContext;
71
72namespace X86ISA
73{
74 class Walker : public MemObject
75 {
76 public:
77 enum State {
78 Ready,
79 Waiting,
80 // Long mode
81 LongPML4, LongPDP, LongPD, LongPTE,
82 // PAE legacy mode
83 PAEPDP, PAEPD, PAEPTE,
84 // Non PAE legacy mode with and without PSE
85 PSEPD, PD, PTE
86 };
87
88 // Act on the current state and determine what to do next. read
89 // should be the packet that just came back from a read and write
90 // should be NULL. When the function returns, read is either NULL
91 // if the machine is finished, or points to a packet to initiate
92 // the next read. If any write is required to update an "accessed"
93 // bit, write will point to a packet to do the write. Otherwise it
94 // will be NULL.
95 void doNext(PacketPtr &read, PacketPtr &write);
96
97 // Kick off the state machine.
|
99
100 protected:
101
102 /*
103 * State having to do with sending packets.
104 */
105 PacketPtr read;
106 std::vector<PacketPtr> writes;
107
108 // How many memory operations are in flight.
109 unsigned inflight;
110
111 bool retrying;
112
113 /*
114 * Functions for dealing with packets.
115 */
116 bool recvTiming(PacketPtr pkt);
117 void recvRetry();
118
119 void sendPackets();
120
121 /*
122 * Port for accessing memory
123 */
124 class WalkerPort : public Port
125 {
126 public:
127 WalkerPort(const std::string &_name, Walker * _walker) :
128 Port(_name, _walker), walker(_walker),
129 snoopRangeSent(false)
130 {}
131
132 protected:
133 Walker * walker;
134
135 bool snoopRangeSent;
136
137 bool recvTiming(PacketPtr pkt);
138 Tick recvAtomic(PacketPtr pkt);
139 void recvFunctional(PacketPtr pkt);
140 void recvStatusChange(Status status);
141 void recvRetry();
142 void getDeviceAddressRanges(AddrRangeList &resp,
143 bool &snoop)
144 {
145 resp.clear();
146 snoop = true;
147 }
148 };
149
150 Port *getPort(const std::string &if_name, int idx = -1);
151
152 friend class WalkerPort;
153
154 WalkerPort port;
155
156 // The TLB we're supposed to load.
157 TLB * tlb;
158 System * sys;
159
160 /*
161 * State machine state.
162 */
163 ThreadContext * tc;
164 State state;
165 State nextState;
166 int size;
167 bool enableNX;
| 99
100 protected:
101
102 /*
103 * State having to do with sending packets.
104 */
105 PacketPtr read;
106 std::vector<PacketPtr> writes;
107
108 // How many memory operations are in flight.
109 unsigned inflight;
110
111 bool retrying;
112
113 /*
114 * Functions for dealing with packets.
115 */
116 bool recvTiming(PacketPtr pkt);
117 void recvRetry();
118
119 void sendPackets();
120
121 /*
122 * Port for accessing memory
123 */
124 class WalkerPort : public Port
125 {
126 public:
127 WalkerPort(const std::string &_name, Walker * _walker) :
128 Port(_name, _walker), walker(_walker),
129 snoopRangeSent(false)
130 {}
131
132 protected:
133 Walker * walker;
134
135 bool snoopRangeSent;
136
137 bool recvTiming(PacketPtr pkt);
138 Tick recvAtomic(PacketPtr pkt);
139 void recvFunctional(PacketPtr pkt);
140 void recvStatusChange(Status status);
141 void recvRetry();
142 void getDeviceAddressRanges(AddrRangeList &resp,
143 bool &snoop)
144 {
145 resp.clear();
146 snoop = true;
147 }
148 };
149
150 Port *getPort(const std::string &if_name, int idx = -1);
151
152 friend class WalkerPort;
153
154 WalkerPort port;
155
156 // The TLB we're supposed to load.
157 TLB * tlb;
158 System * sys;
159
160 /*
161 * State machine state.
162 */
163 ThreadContext * tc;
164 State state;
165 State nextState;
166 int size;
167 bool enableNX;
|
169
170 public:
171
172 void setTLB(TLB * _tlb)
173 {
174 tlb = _tlb;
175 }
176
177 typedef X86PagetableWalkerParams Params;
178
179 Walker(const Params *params) :
180 MemObject(params),
181 read(NULL), inflight(0), retrying(false),
182 port(name() + ".port", this),
183 tlb(NULL), sys(params->system),
184 tc(NULL), state(Ready), nextState(Ready)
185 {
186 }
187 };
188}
189#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
| 172
173 public:
174
175 void setTLB(TLB * _tlb)
176 {
177 tlb = _tlb;
178 }
179
180 typedef X86PagetableWalkerParams Params;
181
182 Walker(const Params *params) :
183 MemObject(params),
184 read(NULL), inflight(0), retrying(false),
185 port(name() + ".port", this),
186 tlb(NULL), sys(params->system),
187 tc(NULL), state(Ready), nextState(Ready)
188 {
189 }
190 };
191}
192#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
|