1/*
2 * Copyright (c) 2006 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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "dev/io_device.hh"
30#include "sim/builder.hh"
31
32
33PioPort::PioPort(PioDevice *dev, Platform *p)
34 : Port(dev->name() + "-pioport"), device(dev), platform(p)
35{ }
36
37
38Tick
39PioPort::recvAtomic(Packet *pkt)
40{
41 return device->recvAtomic(pkt);
42}
43
44void
45PioPort::recvFunctional(Packet *pkt)
46{
47 device->recvAtomic(pkt);
48}
49
50void
51PioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
52{
53 snoop.clear();
54 device->addressRanges(resp);
55}
56
57
58Packet *
59PioPort::recvRetry()
60{
61 Packet* pkt = transmitList.front();
62 transmitList.pop_front();
63 return pkt;
64}
65
66
67void
68PioPort::SendEvent::process()
69{
70 if (port->Port::sendTiming(packet) == Success)
71 return;
72
73 port->transmitList.push_back(packet);
74}
75
76
77bool
78PioPort::recvTiming(Packet *pkt)
79{
80 device->recvAtomic(pkt);
81 // turn packet around to go back to requester
82 pkt->dest = pkt->src;
83 sendTiming(pkt, pkt->time - pkt->req->getTime());
84 return Success;
85}
86
87PioDevice::~PioDevice()
88{
89 if (pioPort)
90 delete pioPort;
91}
92
93void
94PioDevice::init()
95{
96 if (!pioPort)
97 panic("Pio port not connected to anything!");
98 pioPort->sendStatusChange(Port::RangeChange);
99}
100
101void
102BasicPioDevice::addressRanges(AddrRangeList &range_list)
103{
104 assert(pioSize != 0);
105 range_list.clear();
106 range_list.push_back(RangeSize(pioAddr, pioSize));
107}
108
109
110DmaPort::DmaPort(DmaDevice *dev, Platform *p)
111 : Port(dev->name() + "-dmaport"), device(dev), platform(p), pendingCount(0)
112{ }
113
114bool
115DmaPort::recvTiming(Packet *pkt)
116{
117 if (pkt->senderState) {
118 DmaReqState *state;
119 state = (DmaReqState*)pkt->senderState;
120 state->completionEvent->schedule(pkt->time - pkt->req->getTime());
121 delete pkt->req;
122 delete pkt;
123 } else {
124 delete pkt->req;
125 delete pkt;
126 }
127
128 return Success;
129}
130
131DmaDevice::DmaDevice(Params *p)
132 : PioDevice(p), dmaPort(NULL)
133{ }
134
135void
136DmaPort::SendEvent::process()
137{
138 if (port->Port::sendTiming(packet) == Success)
139 return;
140
141 port->transmitList.push_back(packet);
142}
143
144Packet *
145DmaPort::recvRetry()
146{
147 Packet* pkt = transmitList.front();
148 transmitList.pop_front();
149 return pkt;
150}
151void
152DmaPort::dmaAction(Command cmd, Addr addr, int size, Event *event,
153 uint8_t *data)
154{
155
156 assert(event);
157
158 int prevSize = 0;
159 Packet basePkt;
160 Request baseReq(false);
161
162 basePkt.flags = 0;
163 basePkt.coherence = NULL;
164 basePkt.senderState = NULL;
165 basePkt.dest = Packet::Broadcast;
166 basePkt.cmd = cmd;
167 basePkt.result = Unknown;
168 basePkt.req = NULL;
169// baseReq.nicReq = true;
170 baseReq.setTime(curTick);
171
172 for (ChunkGenerator gen(addr, size, peerBlockSize());
173 !gen.done(); gen.next()) {
174 Packet *pkt = new Packet(basePkt);
175 Request *req = new Request(baseReq);
176 pkt->addr = gen.addr();
177 pkt->size = gen.size();
178 pkt->req = req;
179 pkt->req->setPaddr(pkt->addr);
180 pkt->req->setSize(pkt->size);
181 // Increment the data pointer on a write
182 if (data)
183 pkt->dataStatic(data + prevSize) ;
184 prevSize += pkt->size;
185 // Set the last bit of the dma as the final packet for this dma
186 // and set it's completion event.
187 if (prevSize == size) {
188 DmaReqState *state = new DmaReqState(event, true);
189
190 pkt->senderState = (void*)state;
191 }
192 assert(pendingCount >= 0);
193 pendingCount++;
194 sendDma(pkt);
195 }
196 // since this isn't getting used and we want a check to make sure that all
197 // packets had data in them at some point.
198 basePkt.dataStatic((uint8_t*)NULL);
199}
200
201
202void
203DmaPort::sendDma(Packet *pkt)
204{
205 // some kind of selction between access methods
206 // more work is going to have to be done to make
207 // switching actually work
208 /* MemState state = device->platform->system->memState;
209
210 if (state == Timing) {
211 if (sendTiming(pkt) == Failure)
212 transmitList.push_back(&packet);
213 } else if (state == Atomic) {*/
214 sendAtomic(pkt);
215 if (pkt->senderState) {
216 DmaReqState *state = (DmaReqState*)pkt->senderState;
217 state->completionEvent->schedule(curTick + (pkt->time - pkt->req->getTime()) +1);
218 }
219 pendingCount--;
220 assert(pendingCount >= 0);
221 delete pkt->req;
222 delete pkt;
223
224/* } else if (state == Functional) {
225 sendFunctional(pkt);
226 // Is this correct???
227 completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime);
228 completionEvent == NULL;
229 } else
230 panic("Unknown memory command state.");
231 */
232}
233
234DmaDevice::~DmaDevice()
235{
236 if (dmaPort)
237 delete dmaPort;
238}
239
240