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/types.hh"
48#include "mem/mem_object.hh"
49#include "mem/packet.hh"
50#include "params/X86PagetableWalker.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/types.hh"
48#include "mem/mem_object.hh"
49#include "mem/packet.hh"
50#include "params/X86PagetableWalker.hh"
|
51
52class ThreadContext;
53
54namespace X86ISA
55{
56 class Walker : public MemObject
57 {
58 public:
59 enum State {
60 Ready,
61 Waiting,
62 // Long mode
63 LongPML4, LongPDP, LongPD, LongPTE,
64 // PAE legacy mode
65 PAEPDP, PAEPD, PAEPTE,
66 // Non PAE legacy mode with and without PSE
67 PSEPD, PD, PTE
68 };
69
70 // Act on the current state and determine what to do next. The global
71 // read should be the packet that just came back from a read and write
72 // should be NULL. When the function returns, read is either NULL
73 // if the machine is finished, or points to a packet to initiate
74 // the next read. If any write is required to update an "accessed"
75 // bit, write will point to a packet to do the write. Otherwise it
76 // will be NULL. The return value is whatever fault was incurred
77 // during this stage of the lookup.
78 Fault doNext(PacketPtr &write);
79
80 // Kick off the state machine.
81 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
82 RequestPtr req, BaseTLB::Mode mode);
83 // Clean up after the state machine.
84 void
85 stop()
86 {
87 nextState = Ready;
88 delete read->req;
89 delete read;
90 read = NULL;
91 }
92
93 protected:
94
95 /*
96 * State having to do with sending packets.
97 */
98 PacketPtr read;
99 std::vector<PacketPtr> writes;
100
101 // How many memory operations are in flight.
102 unsigned inflight;
103
104 bool retrying;
105
106 /*
107 * The fault, if any, that's waiting to be delivered in timing mode.
108 */
109 Fault timingFault;
110
111 /*
112 * Functions for dealing with packets.
113 */
114 bool recvTiming(PacketPtr pkt);
115 void recvRetry();
116
117 void sendPackets();
118
119 /*
120 * Port for accessing memory
121 */
122 class WalkerPort : public Port
123 {
124 public:
125 WalkerPort(const std::string &_name, Walker * _walker) :
126 Port(_name, _walker), walker(_walker),
127 snoopRangeSent(false)
128 {}
129
130 protected:
131 Walker * walker;
132
133 bool snoopRangeSent;
134
135 bool recvTiming(PacketPtr pkt);
136 Tick recvAtomic(PacketPtr pkt);
137 void recvFunctional(PacketPtr pkt);
138 void recvStatusChange(Status status);
139 void recvRetry();
140 void getDeviceAddressRanges(AddrRangeList &resp,
141 bool &snoop)
142 {
143 resp.clear();
144 snoop = true;
145 }
146 };
147
148 Port *getPort(const std::string &if_name, int idx = -1);
149
150 friend class WalkerPort;
151
152 WalkerPort port;
153
154 // The TLB we're supposed to load.
155 TLB * tlb;
156 System * sys;
157 BaseTLB::Translation * translation;
158
159 /*
160 * State machine state.
161 */
162 ThreadContext * tc;
163 RequestPtr req;
164 State state;
165 State nextState;
166 int size;
167 bool enableNX;
168 BaseTLB::Mode mode;
169 bool user;
170 TlbEntry entry;
171
172 Fault pageFault(bool present);
173
174 public:
175
176 void setTLB(TLB * _tlb)
177 {
178 tlb = _tlb;
179 }
180
181 typedef X86PagetableWalkerParams Params;
182
183 Walker(const Params *params) :
184 MemObject(params),
185 read(NULL), inflight(0), retrying(false),
186 port(name() + ".port", this),
187 tlb(NULL), sys(params->system),
188 tc(NULL), state(Ready), nextState(Ready)
189 {
190 }
191 };
192}
193#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
| 52
53class ThreadContext;
54
55namespace X86ISA
56{
57 class Walker : public MemObject
58 {
59 public:
60 enum State {
61 Ready,
62 Waiting,
63 // Long mode
64 LongPML4, LongPDP, LongPD, LongPTE,
65 // PAE legacy mode
66 PAEPDP, PAEPD, PAEPTE,
67 // Non PAE legacy mode with and without PSE
68 PSEPD, PD, PTE
69 };
70
71 // Act on the current state and determine what to do next. The global
72 // read should be the packet that just came back from a read and write
73 // should be NULL. When the function returns, read is either NULL
74 // if the machine is finished, or points to a packet to initiate
75 // the next read. If any write is required to update an "accessed"
76 // bit, write will point to a packet to do the write. Otherwise it
77 // will be NULL. The return value is whatever fault was incurred
78 // during this stage of the lookup.
79 Fault doNext(PacketPtr &write);
80
81 // Kick off the state machine.
82 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
83 RequestPtr req, BaseTLB::Mode mode);
84 // Clean up after the state machine.
85 void
86 stop()
87 {
88 nextState = Ready;
89 delete read->req;
90 delete read;
91 read = NULL;
92 }
93
94 protected:
95
96 /*
97 * State having to do with sending packets.
98 */
99 PacketPtr read;
100 std::vector<PacketPtr> writes;
101
102 // How many memory operations are in flight.
103 unsigned inflight;
104
105 bool retrying;
106
107 /*
108 * The fault, if any, that's waiting to be delivered in timing mode.
109 */
110 Fault timingFault;
111
112 /*
113 * Functions for dealing with packets.
114 */
115 bool recvTiming(PacketPtr pkt);
116 void recvRetry();
117
118 void sendPackets();
119
120 /*
121 * Port for accessing memory
122 */
123 class WalkerPort : public Port
124 {
125 public:
126 WalkerPort(const std::string &_name, Walker * _walker) :
127 Port(_name, _walker), walker(_walker),
128 snoopRangeSent(false)
129 {}
130
131 protected:
132 Walker * walker;
133
134 bool snoopRangeSent;
135
136 bool recvTiming(PacketPtr pkt);
137 Tick recvAtomic(PacketPtr pkt);
138 void recvFunctional(PacketPtr pkt);
139 void recvStatusChange(Status status);
140 void recvRetry();
141 void getDeviceAddressRanges(AddrRangeList &resp,
142 bool &snoop)
143 {
144 resp.clear();
145 snoop = true;
146 }
147 };
148
149 Port *getPort(const std::string &if_name, int idx = -1);
150
151 friend class WalkerPort;
152
153 WalkerPort port;
154
155 // The TLB we're supposed to load.
156 TLB * tlb;
157 System * sys;
158 BaseTLB::Translation * translation;
159
160 /*
161 * State machine state.
162 */
163 ThreadContext * tc;
164 RequestPtr req;
165 State state;
166 State nextState;
167 int size;
168 bool enableNX;
169 BaseTLB::Mode mode;
170 bool user;
171 TlbEntry entry;
172
173 Fault pageFault(bool present);
174
175 public:
176
177 void setTLB(TLB * _tlb)
178 {
179 tlb = _tlb;
180 }
181
182 typedef X86PagetableWalkerParams Params;
183
184 Walker(const Params *params) :
185 MemObject(params),
186 read(NULL), inflight(0), retrying(false),
187 port(name() + ".port", this),
188 tlb(NULL), sys(params->system),
189 tc(NULL), state(Ready), nextState(Ready)
190 {
191 }
192 };
193}
194#endif // __ARCH_X86_PAGE_TABLE_WALKER_HH__
|