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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132
133bool
134Bridge::BridgeMasterPort::reqQueueFull()
135{
136 return requestQueue.size() == reqQueueLimit;
137}
138
139bool
140Bridge::BridgeMasterPort::recvTimingResp(PacketPtr pkt)
141{
142 // all checks are done when the request is accepted on the slave
143 // side, so we are guaranteed to have space for the response
144 DPRINTF(BusBridge, "recvTiming: response %s addr 0x%x\n",
145 pkt->cmdString(), pkt->getAddr());
146
147 DPRINTF(BusBridge, "Request queue size: %d\n", requestQueue.size());
148
149 slavePort.queueForSendTiming(pkt);
150
151 return true;
152}
153
154bool
155Bridge::BridgeSlavePort::recvTimingReq(PacketPtr pkt)
156{
157 DPRINTF(BusBridge, "recvTiming: request %s addr 0x%x\n",
158 pkt->cmdString(), pkt->getAddr());
159
160 DPRINTF(BusBridge, "Response queue size: %d outresp: %d\n",
161 responseQueue.size(), outstandingResponses);
162
163 if (masterPort.reqQueueFull()) {
164 DPRINTF(BusBridge, "Request queue full, nacking\n");

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306 // If the send was successful, make sure sender state was set to NULL
307 // otherwise we could get a NACK back of a packet that didn't expect a
308 // response and we would try to use freed memory.
309
310 Packet::SenderState *old_sender_state = pkt->senderState;
311 if (!buf->expectResponse)
312 pkt->senderState = NULL;
313
314 if (sendTimingReq(pkt)) {
315 // send successful
316 requestQueue.pop_front();
317 // we no longer own packet, so it's not safe to look at it
318 buf->pkt = NULL;
319
320 if (!buf->expectResponse) {
321 // no response expected... deallocate packet buffer now.
322 DPRINTF(BusBridge, " successful: no response expected\n");

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353 DPRINTF(BusBridge, "trySend: origSrc %d dest %d addr 0x%x\n",
354 buf->origSrc, pkt->getDest(), pkt->getAddr());
355
356 bool was_nacked_here = buf->nackedHere;
357
358 // no need to worry about the sender state since we are not
359 // modifying it
360
361 if (sendTimingResp(pkt)) {
362 DPRINTF(BusBridge, " successful\n");
363 // send successful
364 responseQueue.pop_front();
365 // this is a response... deallocate packet buffer now.
366 delete buf;
367
368 if (!was_nacked_here) {
369 assert(outstandingResponses != 0);

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