io_device.hh (8598:c7fec2cb91cb) io_device.hh (8630:05580a8506c7)
1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

--- 116 unchanged lines hidden (view full) ---

125
126 /** Maximum time that device should back off for after failed sendTiming */
127 Tick maxBackoffDelay;
128
129 /** If the port is currently waiting for a retry before it can send whatever
130 * it is that it's sending. */
131 bool inRetry;
132
1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

--- 116 unchanged lines hidden (view full) ---

125
126 /** Maximum time that device should back off for after failed sendTiming */
127 Tick maxBackoffDelay;
128
129 /** If the port is currently waiting for a retry before it can send whatever
130 * it is that it's sending. */
131 bool inRetry;
132
133 /** Port accesses a cache which requires snooping */
134 bool recvSnoops;
135
136 /** Records snoop response so we only reply once to a status change */
137 bool snoopRangeSent;
138
133 virtual bool recvTiming(PacketPtr pkt);
134 virtual Tick recvAtomic(PacketPtr pkt)
139 virtual bool recvTiming(PacketPtr pkt);
140 virtual Tick recvAtomic(PacketPtr pkt)
135 { panic("dma port shouldn't be used for pio access."); M5_DUMMY_RETURN }
141 {
142 if (recvSnoops) return 0;
143
144 panic("dma port shouldn't be used for pio access."); M5_DUMMY_RETURN
145 }
136 virtual void recvFunctional(PacketPtr pkt)
146 virtual void recvFunctional(PacketPtr pkt)
137 { panic("dma port shouldn't be used for pio access."); }
147 {
148 if (recvSnoops) return;
138
149
150 panic("dma port shouldn't be used for pio access.");
151 }
152
139 virtual void recvStatusChange(Status status)
153 virtual void recvStatusChange(Status status)
140 { ; }
154 {
155 if (recvSnoops) {
156 if (status == RangeChange) {
157 if (!snoopRangeSent) {
158 snoopRangeSent = true;
159 sendStatusChange(Port::RangeChange);
160 }
161 return;
162 }
163 panic("Unexpected recvStatusChange\n");
164 }
165 }
141
142 virtual void recvRetry() ;
143
144 virtual void getDeviceAddressRanges(AddrRangeList &resp,
145 bool &snoop)
166
167 virtual void recvRetry() ;
168
169 virtual void getDeviceAddressRanges(AddrRangeList &resp,
170 bool &snoop)
146 { resp.clear(); snoop = false; }
171 { resp.clear(); snoop = recvSnoops; }
147
148 void queueDma(PacketPtr pkt, bool front = false);
149 void sendDma();
150
151 /** event to give us a kick every time we backoff time is reached. */
152 EventWrapper<DmaPort, &DmaPort::sendDma> backoffEvent;
153
154 public:
172
173 void queueDma(PacketPtr pkt, bool front = false);
174 void sendDma();
175
176 /** event to give us a kick every time we backoff time is reached. */
177 EventWrapper<DmaPort, &DmaPort::sendDma> backoffEvent;
178
179 public:
155 DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff);
180 DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff,
181 bool recv_snoops = false);
156
157 void dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
158 uint8_t *data, Tick delay, Request::Flags flag = 0);
159
160 bool dmaPending() { return pendingCount > 0; }
161
162 unsigned cacheBlockSize() const { return peerBlockSize(); }
163 unsigned int drain(Event *de);

--- 128 unchanged lines hidden --- 		182
183 void dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
184 uint8_t *data, Tick delay, Request::Flags flag = 0);
185
186 bool dmaPending() { return pendingCount > 0; }
187
188 unsigned cacheBlockSize() const { return peerBlockSize(); }
189 unsigned int drain(Event *de);

--- 128 unchanged lines hidden ---