pagetable_walker.hh (5881:73c0aaaaf186) pagetable_walker.hh (5895:569e3b31a868)
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 *

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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
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 *

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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);
94 // will be NULL. The return value is whatever fault was incurred
95 // during this stage of the lookup.
96 Fault doNext(PacketPtr &read, PacketPtr &write);
96
97 // Kick off the state machine.
97
98 // Kick off the state machine.
98 void start(ThreadContext * _tc, Addr vaddr, bool write, bool execute);
99 Fault start(ThreadContext * _tc, BaseTLB::Translation *translation,
100 RequestPtr req, bool write, bool execute);
101 // Clean up after the state machine.
102 void
103 stop()
104 {
105 nextState = Ready;
106 delete read->req;
107 delete read;
108 read = NULL;
109 }
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 /*
110
111 protected:
112
113 /*
114 * State having to do with sending packets.
115 */
116 PacketPtr read;
117 std::vector<PacketPtr> writes;
118
119 // How many memory operations are in flight.
120 unsigned inflight;
121
122 bool retrying;
123
124 /*
125 * The fault, if any, that's waiting to be delivered in timing mode.
126 */
127 Fault timingFault;
128
129 /*
114 * Functions for dealing with packets.
115 */
116 bool recvTiming(PacketPtr pkt);
117 void recvRetry();
118
119 void sendPackets();
120
121 /*

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151
152 friend class WalkerPort;
153
154 WalkerPort port;
155
156 // The TLB we're supposed to load.
157 TLB * tlb;
158 System * sys;
130 * Functions for dealing with packets.
131 */
132 bool recvTiming(PacketPtr pkt);
133 void recvRetry();
134
135 void sendPackets();
136
137 /*

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167
168 friend class WalkerPort;
169
170 WalkerPort port;
171
172 // The TLB we're supposed to load.
173 TLB * tlb;
174 System * sys;
175 BaseTLB::Translation * translation;
159
160 /*
161 * State machine state.
162 */
163 ThreadContext * tc;
176
177 /*
178 * State machine state.
179 */
180 ThreadContext * tc;
181 RequestPtr req;
164 State state;
165 State nextState;
166 int size;
167 bool enableNX;
182 State state;
183 State nextState;
184 int size;
185 bool enableNX;
168 bool write, execute;
186 bool write, execute, user;
169 TlbEntry entry;
170
171 Fault pageFault(bool present);
172
173 public:
174
175 void setTLB(TLB * _tlb)
176 {

--- 16 unchanged lines hidden --- 		187 TlbEntry entry;
188
189 Fault pageFault(bool present);
190
191 public:
192
193 void setTLB(TLB * _tlb)
194 {

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