bridge.cc (8948:e95ee70f876c) bridge.cc (8949:3fa1ee293096)
1/*
2 * Copyright (c) 2011-2012 ARM Limited
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

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139bool
140Bridge::BridgeMasterPort::recvTiming(PacketPtr pkt)
141{
142 // should only see responses on the master side
143 assert(pkt->isResponse());
144
145 // all checks are done when the request is accepted on the slave
146 // side, so we are guaranteed to have space for the response
1/*
2 * Copyright (c) 2011-2012 ARM Limited
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

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

139bool
140Bridge::BridgeMasterPort::recvTiming(PacketPtr pkt)
141{
142 // should only see responses on the master side
143 assert(pkt->isResponse());
144
145 // all checks are done when the request is accepted on the slave
146 // side, so we are guaranteed to have space for the response
147 DPRINTF(BusBridge, "recvTiming: response %s addr 0x%x\n",
148 pkt->cmdString(), pkt->getAddr());
147
149
148 DPRINTF(BusBridge, "recvTiming: src %d dest %d addr 0x%x\n",
149 pkt->getSrc(), pkt->getDest(), pkt->getAddr());
150
151 DPRINTF(BusBridge, "Request queue size: %d\n", requestQueue.size());
152
153 slavePort.queueForSendTiming(pkt);
154
155 return true;
156}
157
158bool
159Bridge::BridgeSlavePort::recvTiming(PacketPtr pkt)
160{
161 // should only see requests on the slave side
162 assert(pkt->isRequest());
163
150 DPRINTF(BusBridge, "Request queue size: %d\n", requestQueue.size());
151
152 slavePort.queueForSendTiming(pkt);
153
154 return true;
155}
156
157bool
158Bridge::BridgeSlavePort::recvTiming(PacketPtr pkt)
159{
160 // should only see requests on the slave side
161 assert(pkt->isRequest());
162
164 DPRINTF(BusBridge, "recvTiming: src %d dest %d addr 0x%x\n",
165 pkt->getSrc(), pkt->getDest(), pkt->getAddr());
166
163
164 DPRINTF(BusBridge, "recvTiming: request %s addr 0x%x\n",
165 pkt->cmdString(), pkt->getAddr());
166
167 DPRINTF(BusBridge, "Response queue size: %d outresp: %d\n",
168 responseQueue.size(), outstandingResponses);
169
170 if (masterPort.reqQueueFull()) {
171 DPRINTF(BusBridge, "Request queue full, nacking\n");
172 nackRequest(pkt);
173 return true;
174 }

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272 // corresponding PacketBuffer should be stored in the packet's
273 // senderState field.
274 PacketBuffer *buf = dynamic_cast<PacketBuffer*>(pkt->senderState);
275 assert(buf != NULL);
276 // set up new packet dest & senderState based on values saved
277 // from original request
278 buf->fixResponse(pkt);
279
167 DPRINTF(BusBridge, "Response queue size: %d outresp: %d\n",
168 responseQueue.size(), outstandingResponses);
169
170 if (masterPort.reqQueueFull()) {
171 DPRINTF(BusBridge, "Request queue full, nacking\n");
172 nackRequest(pkt);
173 return true;
174 }

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272 // corresponding PacketBuffer should be stored in the packet's
273 // senderState field.
274 PacketBuffer *buf = dynamic_cast<PacketBuffer*>(pkt->senderState);
275 assert(buf != NULL);
276 // set up new packet dest & senderState based on values saved
277 // from original request
278 buf->fixResponse(pkt);
279
280 // the bridge assumes that at least one bus has set the
281 // destination field of the packet
282 assert(pkt->isDestValid());
280 DPRINTF(BusBridge, "response, new dest %d\n", pkt->getDest());
281 delete buf;
282
283 Tick readyTime = curTick() + delay;
284 buf = new PacketBuffer(pkt, readyTime);
285
286 // If we're about to put this packet at the head of the queue, we
287 // need to schedule an event to do the transmit. Otherwise there

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299 assert(!requestQueue.empty());
300
301 PacketBuffer *buf = requestQueue.front();
302
303 assert(buf->ready <= curTick());
304
305 PacketPtr pkt = buf->pkt;
306
283 DPRINTF(BusBridge, "response, new dest %d\n", pkt->getDest());
284 delete buf;
285
286 Tick readyTime = curTick() + delay;
287 buf = new PacketBuffer(pkt, readyTime);
288
289 // If we're about to put this packet at the head of the queue, we
290 // need to schedule an event to do the transmit. Otherwise there

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302 assert(!requestQueue.empty());
303
304 PacketBuffer *buf = requestQueue.front();
305
306 assert(buf->ready <= curTick());
307
308 PacketPtr pkt = buf->pkt;
309
307 DPRINTF(BusBridge, "trySend: origSrc %d dest %d addr 0x%x\n",
308 buf->origSrc, pkt->getDest(), pkt->getAddr());
310 DPRINTF(BusBridge, "trySend: origSrc %d addr 0x%x\n",
311 buf->origSrc, pkt->getAddr());
309
310 // If the send was successful, make sure sender state was set to NULL
311 // otherwise we could get a NACK back of a packet that didn't expect a
312 // response and we would try to use freed memory.
313
314 Packet::SenderState *old_sender_state = pkt->senderState;
315 if (!buf->expectResponse)
316 pkt->senderState = NULL;

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313 // If the send was successful, make sure sender state was set to NULL
314 // otherwise we could get a NACK back of a packet that didn't expect a
315 // response and we would try to use freed memory.
316
317 Packet::SenderState *old_sender_state = pkt->senderState;
318 if (!buf->expectResponse)
319 pkt->senderState = NULL;

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