io_device.cc (2685:a0821abe7132) io_device.cc (2784:6cff1a1c2935)
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 * Authors: Ali Saidi
29 * Nathan Binkert
30 */
31
32#include "base/trace.hh"
33#include "dev/io_device.hh"
34#include "sim/builder.hh"
35
36
37PioPort::PioPort(PioDevice *dev, Platform *p)
38 : Port(dev->name() + "-pioport"), device(dev), platform(p)
39{ }
40
41
42Tick
43PioPort::recvAtomic(Packet *pkt)
44{
45 return device->recvAtomic(pkt);
46}
47
48void
49PioPort::recvFunctional(Packet *pkt)
50{
51 device->recvAtomic(pkt);
52}
53
54void
55PioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
56{
57 snoop.clear();
58 device->addressRanges(resp);
59}
60
61
62void
63PioPort::recvRetry()
64{
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 * Authors: Ali Saidi
29 * Nathan Binkert
30 */
31
32#include "base/trace.hh"
33#include "dev/io_device.hh"
34#include "sim/builder.hh"
35
36
37PioPort::PioPort(PioDevice *dev, Platform *p)
38 : Port(dev->name() + "-pioport"), device(dev), platform(p)
39{ }
40
41
42Tick
43PioPort::recvAtomic(Packet *pkt)
44{
45 return device->recvAtomic(pkt);
46}
47
48void
49PioPort::recvFunctional(Packet *pkt)
50{
51 device->recvAtomic(pkt);
52}
53
54void
55PioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
56{
57 snoop.clear();
58 device->addressRanges(resp);
59}
60
61
62void
63PioPort::recvRetry()
64{
65 Packet* pkt = transmitList.front();
66 if (Port::sendTiming(pkt)) {
67 transmitList.pop_front();
65 bool result = true;
66 while (result && transmitList.size()) {
67 result = Port::sendTiming(transmitList.front());
68 if (result)
69 transmitList.pop_front();
68 }
69}
70
70 }
71}
72
71
72void
73PioPort::SendEvent::process()
74{
75 if (port->Port::sendTiming(packet))
76 return;
77
78 port->transmitList.push_back(packet);
79}
80
81
82
83bool
84PioPort::recvTiming(Packet *pkt)
85{
73void
74PioPort::SendEvent::process()
75{
76 if (port->Port::sendTiming(packet))
77 return;
78
79 port->transmitList.push_back(packet);
80}
81
82
83
84bool
85PioPort::recvTiming(Packet *pkt)
86{
86 Tick latency = device->recvAtomic(pkt);
87 // turn packet around to go back to requester
88 pkt->makeTimingResponse();
89 sendTiming(pkt, latency);
87 if (pkt->result == Packet::Nacked) {
88 pkt->reinitNacked();
89 if (transmitList.size()) {
90 transmitList.push_front(pkt);
91 } else {
92 if (!Port::sendTiming(pkt))
93 transmitList.push_front(pkt);
94 }
95 } else {
96 Tick latency = device->recvAtomic(pkt);
97 // turn packet around to go back to requester
98 pkt->makeTimingResponse();
99 sendTiming(pkt, latency);
100 }
90 return true;
91}
92
93PioDevice::~PioDevice()
94{
95 if (pioPort)
96 delete pioPort;
97}
98
99void
100PioDevice::init()
101{
102 if (!pioPort)
103 panic("Pio port not connected to anything!");
104 pioPort->sendStatusChange(Port::RangeChange);
105}
106
107void
108BasicPioDevice::addressRanges(AddrRangeList &range_list)
109{
110 assert(pioSize != 0);
111 range_list.clear();
112 range_list.push_back(RangeSize(pioAddr, pioSize));
113}
114
115
116DmaPort::DmaPort(DmaDevice *dev, Platform *p)
117 : Port(dev->name() + "-dmaport"), device(dev), platform(p), pendingCount(0)
118{ }
119
120bool
121DmaPort::recvTiming(Packet *pkt)
122{
123
124
125 if (pkt->result == Packet::Nacked) {
126 DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n",
127 pkt, pkt->senderState, pkt->getAddr());
128 pkt->reinitNacked();
129 sendDma(pkt, true);
130 } else if (pkt->senderState) {
131 DmaReqState *state;
132 DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x\n",
133 pkt, pkt->senderState, pkt->getAddr());
134 state = dynamic_cast<DmaReqState*>(pkt->senderState);
135 pendingCount--;
136
137 assert(pendingCount >= 0);
138 assert(state);
139
140 state->numBytes += pkt->req->getSize();
141 if (state->totBytes == state->numBytes) {
142 state->completionEvent->process();
143 delete state;
144 }
145 delete pkt->req;
146 delete pkt;
147 } else {
148 panic("Got packet without sender state... huh?\n");
149 }
150
151 return true;
152}
153
154DmaDevice::DmaDevice(Params *p)
155 : PioDevice(p), dmaPort(NULL)
156{ }
157
158void
159DmaPort::recvRetry()
160{
161 Packet* pkt = transmitList.front();
162 bool result = true;
163 while (result && transmitList.size()) {
164 DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n",
165 pkt, pkt->senderState);
166 result = sendTiming(pkt);
167 if (result) {
168 DPRINTF(DMA, "-- Done\n");
169 transmitList.pop_front();
170 } else {
171 DPRINTF(DMA, "-- Failed, queued\n");
172 }
173 }
174}
175
176
177void
178DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
179 uint8_t *data)
180{
181 assert(event);
182
183 DmaReqState *reqState = new DmaReqState(event, this, size);
184
185 for (ChunkGenerator gen(addr, size, peerBlockSize());
186 !gen.done(); gen.next()) {
187 Request *req = new Request(gen.addr(), gen.size(), 0);
188 Packet *pkt = new Packet(req, cmd, Packet::Broadcast);
189
190 // Increment the data pointer on a write
191 if (data)
192 pkt->dataStatic(data + gen.complete());
193
194 pkt->senderState = reqState;
195
196 assert(pendingCount >= 0);
197 pendingCount++;
198 sendDma(pkt);
199 }
200}
201
202
203void
204DmaPort::sendDma(Packet *pkt, bool front)
205{
206 // some kind of selction between access methods
207 // more work is going to have to be done to make
208 // switching actually work
209 /* MemState state = device->platform->system->memState;
210
211 if (state == Timing) { */
212 DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n",
213 pkt, pkt->getAddr());
214 if (transmitList.size() || !sendTiming(pkt)) {
215 if (front)
216 transmitList.push_front(pkt);
217 else
218 transmitList.push_back(pkt);
219 DPRINTF(DMA, "-- Failed: queued\n");
220 } else {
221 DPRINTF(DMA, "-- Done\n");
222 }
223 /* } else if (state == Atomic) {
224 sendAtomic(pkt);
225 if (pkt->senderState) {
226 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
227 assert(state);
228 state->completionEvent->schedule(curTick + (pkt->time -
229 pkt->req->getTime()) +1);
230 delete state;
231 }
232 pendingCount--;
233 assert(pendingCount >= 0);
234 delete pkt->req;
235 delete pkt;
236
237 } else if (state == Functional) {
238 sendFunctional(pkt);
239 // Is this correct???
240 completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime);
241 completionEvent == NULL;
242 } else
243 panic("Unknown memory command state.");
244 */
245}
246
247DmaDevice::~DmaDevice()
248{
249 if (dmaPort)
250 delete dmaPort;
251}
252
253
101 return true;
102}
103
104PioDevice::~PioDevice()
105{
106 if (pioPort)
107 delete pioPort;
108}
109
110void
111PioDevice::init()
112{
113 if (!pioPort)
114 panic("Pio port not connected to anything!");
115 pioPort->sendStatusChange(Port::RangeChange);
116}
117
118void
119BasicPioDevice::addressRanges(AddrRangeList &range_list)
120{
121 assert(pioSize != 0);
122 range_list.clear();
123 range_list.push_back(RangeSize(pioAddr, pioSize));
124}
125
126
127DmaPort::DmaPort(DmaDevice *dev, Platform *p)
128 : Port(dev->name() + "-dmaport"), device(dev), platform(p), pendingCount(0)
129{ }
130
131bool
132DmaPort::recvTiming(Packet *pkt)
133{
134
135
136 if (pkt->result == Packet::Nacked) {
137 DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n",
138 pkt, pkt->senderState, pkt->getAddr());
139 pkt->reinitNacked();
140 sendDma(pkt, true);
141 } else if (pkt->senderState) {
142 DmaReqState *state;
143 DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x\n",
144 pkt, pkt->senderState, pkt->getAddr());
145 state = dynamic_cast<DmaReqState*>(pkt->senderState);
146 pendingCount--;
147
148 assert(pendingCount >= 0);
149 assert(state);
150
151 state->numBytes += pkt->req->getSize();
152 if (state->totBytes == state->numBytes) {
153 state->completionEvent->process();
154 delete state;
155 }
156 delete pkt->req;
157 delete pkt;
158 } else {
159 panic("Got packet without sender state... huh?\n");
160 }
161
162 return true;
163}
164
165DmaDevice::DmaDevice(Params *p)
166 : PioDevice(p), dmaPort(NULL)
167{ }
168
169void
170DmaPort::recvRetry()
171{
172 Packet* pkt = transmitList.front();
173 bool result = true;
174 while (result && transmitList.size()) {
175 DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n",
176 pkt, pkt->senderState);
177 result = sendTiming(pkt);
178 if (result) {
179 DPRINTF(DMA, "-- Done\n");
180 transmitList.pop_front();
181 } else {
182 DPRINTF(DMA, "-- Failed, queued\n");
183 }
184 }
185}
186
187
188void
189DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
190 uint8_t *data)
191{
192 assert(event);
193
194 DmaReqState *reqState = new DmaReqState(event, this, size);
195
196 for (ChunkGenerator gen(addr, size, peerBlockSize());
197 !gen.done(); gen.next()) {
198 Request *req = new Request(gen.addr(), gen.size(), 0);
199 Packet *pkt = new Packet(req, cmd, Packet::Broadcast);
200
201 // Increment the data pointer on a write
202 if (data)
203 pkt->dataStatic(data + gen.complete());
204
205 pkt->senderState = reqState;
206
207 assert(pendingCount >= 0);
208 pendingCount++;
209 sendDma(pkt);
210 }
211}
212
213
214void
215DmaPort::sendDma(Packet *pkt, bool front)
216{
217 // some kind of selction between access methods
218 // more work is going to have to be done to make
219 // switching actually work
220 /* MemState state = device->platform->system->memState;
221
222 if (state == Timing) { */
223 DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n",
224 pkt, pkt->getAddr());
225 if (transmitList.size() || !sendTiming(pkt)) {
226 if (front)
227 transmitList.push_front(pkt);
228 else
229 transmitList.push_back(pkt);
230 DPRINTF(DMA, "-- Failed: queued\n");
231 } else {
232 DPRINTF(DMA, "-- Done\n");
233 }
234 /* } else if (state == Atomic) {
235 sendAtomic(pkt);
236 if (pkt->senderState) {
237 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
238 assert(state);
239 state->completionEvent->schedule(curTick + (pkt->time -
240 pkt->req->getTime()) +1);
241 delete state;
242 }
243 pendingCount--;
244 assert(pendingCount >= 0);
245 delete pkt->req;
246 delete pkt;
247
248 } else if (state == Functional) {
249 sendFunctional(pkt);
250 // Is this correct???
251 completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime);
252 completionEvent == NULL;
253 } else
254 panic("Unknown memory command state.");
255 */
256}
257
258DmaDevice::~DmaDevice()
259{
260 if (dmaPort)
261 delete dmaPort;
262}
263
264