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/chunk_generator.hh" 33#include "base/trace.hh" 34#include "debug/BusAddrRanges.hh" 35#include "debug/DMA.hh" 36#include "dev/io_device.hh" 37#include "sim/system.hh" 38 39PioPort::PioPort(PioDevice *dev, System *s, std::string pname) 40 : SimpleTimingPort(dev->name() + pname, dev), device(dev) 41{ } 42 43 44Tick 45PioPort::recvAtomic(PacketPtr pkt) 46{ 47 return pkt->isRead() ? device->read(pkt) : device->write(pkt); 48} 49 50void 51PioPort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop) 52{ 53 snoop = false; 54 device->addressRanges(resp); 55 for (AddrRangeIter i = resp.begin(); i != resp.end(); i++) 56 DPRINTF(BusAddrRanges, "Adding Range %#x-%#x\n", i->start, i->end); 57} 58 59 60PioDevice::PioDevice(const Params *p) 61 : MemObject(p), sys(p->system), pioPort(NULL) 62{} 63 64PioDevice::~PioDevice() 65{ 66 if (pioPort) 67 delete pioPort; 68} 69 70void 71PioDevice::init() 72{ 73 if (!pioPort) 74 panic("Pio port %s not connected to anything!", name()); 75 pioPort->sendStatusChange(Port::RangeChange); 76} 77
| 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/chunk_generator.hh" 33#include "base/trace.hh" 34#include "debug/BusAddrRanges.hh" 35#include "debug/DMA.hh" 36#include "dev/io_device.hh" 37#include "sim/system.hh" 38 39PioPort::PioPort(PioDevice *dev, System *s, std::string pname) 40 : SimpleTimingPort(dev->name() + pname, dev), device(dev) 41{ } 42 43 44Tick 45PioPort::recvAtomic(PacketPtr pkt) 46{ 47 return pkt->isRead() ? device->read(pkt) : device->write(pkt); 48} 49 50void 51PioPort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop) 52{ 53 snoop = false; 54 device->addressRanges(resp); 55 for (AddrRangeIter i = resp.begin(); i != resp.end(); i++) 56 DPRINTF(BusAddrRanges, "Adding Range %#x-%#x\n", i->start, i->end); 57} 58 59 60PioDevice::PioDevice(const Params *p) 61 : MemObject(p), sys(p->system), pioPort(NULL) 62{} 63 64PioDevice::~PioDevice() 65{ 66 if (pioPort) 67 delete pioPort; 68} 69 70void 71PioDevice::init() 72{ 73 if (!pioPort) 74 panic("Pio port %s not connected to anything!", name()); 75 pioPort->sendStatusChange(Port::RangeChange); 76} 77
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78 79unsigned int 80PioDevice::drain(Event *de) 81{ 82 unsigned int count; 83 count = pioPort->drain(de); 84 if (count) 85 changeState(Draining); 86 else 87 changeState(Drained); 88 return count; 89} 90 91BasicPioDevice::BasicPioDevice(const Params *p) 92 : PioDevice(p), pioAddr(p->pio_addr), pioSize(0), 93 pioDelay(p->pio_latency) 94{} 95 96void 97BasicPioDevice::addressRanges(AddrRangeList &range_list) 98{ 99 assert(pioSize != 0); 100 range_list.clear(); 101 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 102 range_list.push_back(RangeSize(pioAddr, pioSize)); 103} 104 105 106DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff) 107 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s), 108 pendingCount(0), actionInProgress(0), drainEvent(NULL), 109 backoffTime(0), minBackoffDelay(min_backoff), 110 maxBackoffDelay(max_backoff), inRetry(false), backoffEvent(this) 111{ } 112 113bool 114DmaPort::recvTiming(PacketPtr pkt) 115{ 116 if (pkt->wasNacked()) { 117 DPRINTF(DMA, "Received nacked %s addr %#x\n", 118 pkt->cmdString(), pkt->getAddr()); 119 120 if (backoffTime < minBackoffDelay) 121 backoffTime = minBackoffDelay; 122 else if (backoffTime < maxBackoffDelay) 123 backoffTime <<= 1; 124 125 reschedule(backoffEvent, curTick() + backoffTime, true); 126 127 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime); 128 129 pkt->reinitNacked(); 130 queueDma(pkt, true); 131 } else if (pkt->senderState) { 132 DmaReqState *state; 133 backoffTime >>= 2; 134 135 DPRINTF(DMA, "Received response %s addr %#x size %#x\n", 136 pkt->cmdString(), pkt->getAddr(), pkt->req->getSize()); 137 state = dynamic_cast<DmaReqState*>(pkt->senderState); 138 pendingCount--; 139 140 assert(pendingCount >= 0); 141 assert(state); 142 143 // We shouldn't ever get a block in ownership state 144 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted())); 145 146 state->numBytes += pkt->req->getSize(); 147 assert(state->totBytes >= state->numBytes); 148 if (state->totBytes == state->numBytes) { 149 if (state->completionEvent) { 150 if (state->delay) 151 schedule(state->completionEvent, curTick() + state->delay); 152 else 153 state->completionEvent->process(); 154 } 155 delete state; 156 } 157 delete pkt->req; 158 delete pkt; 159 160 if (pendingCount == 0 && drainEvent) { 161 drainEvent->process(); 162 drainEvent = NULL; 163 } 164 } else { 165 panic("Got packet without sender state... huh?\n"); 166 } 167 168 return true; 169} 170 171DmaDevice::DmaDevice(const Params *p) 172 : PioDevice(p), dmaPort(NULL) 173{ } 174 175 176unsigned int 177DmaDevice::drain(Event *de) 178{ 179 unsigned int count; 180 count = pioPort->drain(de) + dmaPort->drain(de); 181 if (count) 182 changeState(Draining); 183 else 184 changeState(Drained); 185 return count; 186} 187 188unsigned int 189DmaPort::drain(Event *de) 190{ 191 if (pendingCount == 0) 192 return 0; 193 drainEvent = de; 194 return 1; 195} 196 197 198void 199DmaPort::recvRetry() 200{ 201 assert(transmitList.size()); 202 bool result = true; 203 do { 204 PacketPtr pkt = transmitList.front(); 205 DPRINTF(DMA, "Retry on %s addr %#x\n", 206 pkt->cmdString(), pkt->getAddr()); 207 result = sendTiming(pkt); 208 if (result) { 209 DPRINTF(DMA, "-- Done\n"); 210 transmitList.pop_front(); 211 inRetry = false; 212 } else { 213 inRetry = true; 214 DPRINTF(DMA, "-- Failed, queued\n"); 215 } 216 } while (!backoffTime && result && transmitList.size()); 217 218 if (transmitList.size() && backoffTime && !inRetry) { 219 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime); 220 if (!backoffEvent.scheduled()) 221 schedule(backoffEvent, backoffTime + curTick()); 222 } 223 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n", 224 transmitList.size(), backoffTime, inRetry, 225 backoffEvent.scheduled()); 226} 227 228 229void 230DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 231 uint8_t *data, Tick delay, Request::Flags flag) 232{ 233 assert(device->getState() == SimObject::Running); 234 235 DmaReqState *reqState = new DmaReqState(event, this, size, delay); 236 237 238 DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size, 239 event ? event->scheduled() : -1 ); 240 for (ChunkGenerator gen(addr, size, peerBlockSize()); 241 !gen.done(); gen.next()) { 242 Request *req = new Request(gen.addr(), gen.size(), flag); 243 PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast); 244 245 // Increment the data pointer on a write 246 if (data) 247 pkt->dataStatic(data + gen.complete()); 248 249 pkt->senderState = reqState; 250 251 assert(pendingCount >= 0); 252 pendingCount++; 253 DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), 254 gen.size()); 255 queueDma(pkt); 256 } 257 258} 259 260void 261DmaPort::queueDma(PacketPtr pkt, bool front) 262{ 263 264 if (front) 265 transmitList.push_front(pkt); 266 else 267 transmitList.push_back(pkt); 268 sendDma(); 269} 270 271 272void 273DmaPort::sendDma() 274{ 275 // some kind of selction between access methods 276 // more work is going to have to be done to make 277 // switching actually work 278 assert(transmitList.size()); 279 PacketPtr pkt = transmitList.front(); 280 281 Enums::MemoryMode state = sys->getMemoryMode(); 282 if (state == Enums::timing) { 283 if (backoffEvent.scheduled() || inRetry) { 284 DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n"); 285 return; 286 } 287 288 DPRINTF(DMA, "Attempting to send %s addr %#x\n", 289 pkt->cmdString(), pkt->getAddr()); 290 291 bool result; 292 do { 293 result = sendTiming(pkt); 294 if (result) { 295 transmitList.pop_front(); 296 DPRINTF(DMA, "-- Done\n"); 297 } else { 298 inRetry = true; 299 DPRINTF(DMA, "-- Failed: queued\n"); 300 } 301 } while (result && !backoffTime && transmitList.size()); 302 303 if (transmitList.size() && backoffTime && !inRetry && 304 !backoffEvent.scheduled()) { 305 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n", 306 backoffTime+curTick()); 307 schedule(backoffEvent, backoffTime + curTick()); 308 } 309 } else if (state == Enums::atomic) { 310 transmitList.pop_front(); 311 312 Tick lat; 313 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n", 314 pkt->req->getPaddr(), pkt->req->getSize()); 315 lat = sendAtomic(pkt); 316 assert(pkt->senderState); 317 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 318 assert(state); 319 state->numBytes += pkt->req->getSize(); 320 321 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n", 322 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes, 323 state->totBytes, 324 state->completionEvent ? state->completionEvent->scheduled() : 0 ); 325 326 if (state->totBytes == state->numBytes) { 327 if (state->completionEvent) { 328 assert(!state->completionEvent->scheduled()); 329 schedule(state->completionEvent, curTick() + lat + state->delay); 330 } 331 delete state; 332 delete pkt->req; 333 } 334 pendingCount--; 335 assert(pendingCount >= 0); 336 delete pkt; 337 338 if (pendingCount == 0 && drainEvent) { 339 drainEvent->process(); 340 drainEvent = NULL; 341 } 342 343 } else 344 panic("Unknown memory command state."); 345} 346 347DmaDevice::~DmaDevice() 348{ 349 if (dmaPort) 350 delete dmaPort; 351}
| 90 91unsigned int 92PioDevice::drain(Event *de) 93{ 94 unsigned int count; 95 count = pioPort->drain(de); 96 if (count) 97 changeState(Draining); 98 else 99 changeState(Drained); 100 return count; 101} 102 103BasicPioDevice::BasicPioDevice(const Params *p) 104 : PioDevice(p), pioAddr(p->pio_addr), pioSize(0), 105 pioDelay(p->pio_latency) 106{} 107 108void 109BasicPioDevice::addressRanges(AddrRangeList &range_list) 110{ 111 assert(pioSize != 0); 112 range_list.clear(); 113 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 114 range_list.push_back(RangeSize(pioAddr, pioSize)); 115} 116 117 118DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff) 119 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s), 120 pendingCount(0), actionInProgress(0), drainEvent(NULL), 121 backoffTime(0), minBackoffDelay(min_backoff), 122 maxBackoffDelay(max_backoff), inRetry(false), backoffEvent(this) 123{ } 124 125bool 126DmaPort::recvTiming(PacketPtr pkt) 127{ 128 if (pkt->wasNacked()) { 129 DPRINTF(DMA, "Received nacked %s addr %#x\n", 130 pkt->cmdString(), pkt->getAddr()); 131 132 if (backoffTime < minBackoffDelay) 133 backoffTime = minBackoffDelay; 134 else if (backoffTime < maxBackoffDelay) 135 backoffTime <<= 1; 136 137 reschedule(backoffEvent, curTick() + backoffTime, true); 138 139 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime); 140 141 pkt->reinitNacked(); 142 queueDma(pkt, true); 143 } else if (pkt->senderState) { 144 DmaReqState *state; 145 backoffTime >>= 2; 146 147 DPRINTF(DMA, "Received response %s addr %#x size %#x\n", 148 pkt->cmdString(), pkt->getAddr(), pkt->req->getSize()); 149 state = dynamic_cast<DmaReqState*>(pkt->senderState); 150 pendingCount--; 151 152 assert(pendingCount >= 0); 153 assert(state); 154 155 // We shouldn't ever get a block in ownership state 156 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted())); 157 158 state->numBytes += pkt->req->getSize(); 159 assert(state->totBytes >= state->numBytes); 160 if (state->totBytes == state->numBytes) { 161 if (state->completionEvent) { 162 if (state->delay) 163 schedule(state->completionEvent, curTick() + state->delay); 164 else 165 state->completionEvent->process(); 166 } 167 delete state; 168 } 169 delete pkt->req; 170 delete pkt; 171 172 if (pendingCount == 0 && drainEvent) { 173 drainEvent->process(); 174 drainEvent = NULL; 175 } 176 } else { 177 panic("Got packet without sender state... huh?\n"); 178 } 179 180 return true; 181} 182 183DmaDevice::DmaDevice(const Params *p) 184 : PioDevice(p), dmaPort(NULL) 185{ } 186 187 188unsigned int 189DmaDevice::drain(Event *de) 190{ 191 unsigned int count; 192 count = pioPort->drain(de) + dmaPort->drain(de); 193 if (count) 194 changeState(Draining); 195 else 196 changeState(Drained); 197 return count; 198} 199 200unsigned int 201DmaPort::drain(Event *de) 202{ 203 if (pendingCount == 0) 204 return 0; 205 drainEvent = de; 206 return 1; 207} 208 209 210void 211DmaPort::recvRetry() 212{ 213 assert(transmitList.size()); 214 bool result = true; 215 do { 216 PacketPtr pkt = transmitList.front(); 217 DPRINTF(DMA, "Retry on %s addr %#x\n", 218 pkt->cmdString(), pkt->getAddr()); 219 result = sendTiming(pkt); 220 if (result) { 221 DPRINTF(DMA, "-- Done\n"); 222 transmitList.pop_front(); 223 inRetry = false; 224 } else { 225 inRetry = true; 226 DPRINTF(DMA, "-- Failed, queued\n"); 227 } 228 } while (!backoffTime && result && transmitList.size()); 229 230 if (transmitList.size() && backoffTime && !inRetry) { 231 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime); 232 if (!backoffEvent.scheduled()) 233 schedule(backoffEvent, backoffTime + curTick()); 234 } 235 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n", 236 transmitList.size(), backoffTime, inRetry, 237 backoffEvent.scheduled()); 238} 239 240 241void 242DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 243 uint8_t *data, Tick delay, Request::Flags flag) 244{ 245 assert(device->getState() == SimObject::Running); 246 247 DmaReqState *reqState = new DmaReqState(event, this, size, delay); 248 249 250 DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size, 251 event ? event->scheduled() : -1 ); 252 for (ChunkGenerator gen(addr, size, peerBlockSize()); 253 !gen.done(); gen.next()) { 254 Request *req = new Request(gen.addr(), gen.size(), flag); 255 PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast); 256 257 // Increment the data pointer on a write 258 if (data) 259 pkt->dataStatic(data + gen.complete()); 260 261 pkt->senderState = reqState; 262 263 assert(pendingCount >= 0); 264 pendingCount++; 265 DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), 266 gen.size()); 267 queueDma(pkt); 268 } 269 270} 271 272void 273DmaPort::queueDma(PacketPtr pkt, bool front) 274{ 275 276 if (front) 277 transmitList.push_front(pkt); 278 else 279 transmitList.push_back(pkt); 280 sendDma(); 281} 282 283 284void 285DmaPort::sendDma() 286{ 287 // some kind of selction between access methods 288 // more work is going to have to be done to make 289 // switching actually work 290 assert(transmitList.size()); 291 PacketPtr pkt = transmitList.front(); 292 293 Enums::MemoryMode state = sys->getMemoryMode(); 294 if (state == Enums::timing) { 295 if (backoffEvent.scheduled() || inRetry) { 296 DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n"); 297 return; 298 } 299 300 DPRINTF(DMA, "Attempting to send %s addr %#x\n", 301 pkt->cmdString(), pkt->getAddr()); 302 303 bool result; 304 do { 305 result = sendTiming(pkt); 306 if (result) { 307 transmitList.pop_front(); 308 DPRINTF(DMA, "-- Done\n"); 309 } else { 310 inRetry = true; 311 DPRINTF(DMA, "-- Failed: queued\n"); 312 } 313 } while (result && !backoffTime && transmitList.size()); 314 315 if (transmitList.size() && backoffTime && !inRetry && 316 !backoffEvent.scheduled()) { 317 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n", 318 backoffTime+curTick()); 319 schedule(backoffEvent, backoffTime + curTick()); 320 } 321 } else if (state == Enums::atomic) { 322 transmitList.pop_front(); 323 324 Tick lat; 325 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n", 326 pkt->req->getPaddr(), pkt->req->getSize()); 327 lat = sendAtomic(pkt); 328 assert(pkt->senderState); 329 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 330 assert(state); 331 state->numBytes += pkt->req->getSize(); 332 333 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n", 334 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes, 335 state->totBytes, 336 state->completionEvent ? state->completionEvent->scheduled() : 0 ); 337 338 if (state->totBytes == state->numBytes) { 339 if (state->completionEvent) { 340 assert(!state->completionEvent->scheduled()); 341 schedule(state->completionEvent, curTick() + lat + state->delay); 342 } 343 delete state; 344 delete pkt->req; 345 } 346 pendingCount--; 347 assert(pendingCount >= 0); 348 delete pkt; 349 350 if (pendingCount == 0 && drainEvent) { 351 drainEvent->process(); 352 drainEvent = NULL; 353 } 354 355 } else 356 panic("Unknown memory command state."); 357} 358 359DmaDevice::~DmaDevice() 360{ 361 if (dmaPort) 362 delete dmaPort; 363}
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