tsunami_cchip.cc revision 8232:b28d06a175be
1/* 2 * Copyright (c) 2004-2005 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 * Ron Dreslinski 30 */ 31 32/** @file 33 * Emulation of the Tsunami CChip CSRs 34 */ 35 36#include <deque> 37#include <string> 38#include <vector> 39 40#include "arch/alpha/ev5.hh" 41#include "base/trace.hh" 42#include "config/the_isa.hh" 43#include "cpu/intr_control.hh" 44#include "cpu/thread_context.hh" 45#include "debug/IPI.hh" 46#include "debug/Tsunami.hh" 47#include "dev/alpha/tsunami.hh" 48#include "dev/alpha/tsunami_cchip.hh" 49#include "dev/alpha/tsunamireg.h" 50#include "mem/packet.hh" 51#include "mem/packet_access.hh" 52#include "mem/port.hh" 53#include "params/TsunamiCChip.hh" 54#include "sim/system.hh" 55 56using namespace std; 57//Should this be AlphaISA? 58using namespace TheISA; 59 60TsunamiCChip::TsunamiCChip(const Params *p) 61 : BasicPioDevice(p), tsunami(p->tsunami) 62{ 63 pioSize = 0x10000000; 64 65 drir = 0; 66 ipint = 0; 67 itint = 0; 68 69 for (int x = 0; x < Tsunami::Max_CPUs; x++) 70 { 71 dim[x] = 0; 72 dir[x] = 0; 73 } 74 75 //Put back pointer in tsunami 76 tsunami->cchip = this; 77} 78 79Tick 80TsunamiCChip::read(PacketPtr pkt) 81{ 82 DPRINTF(Tsunami, "read va=%#x size=%d\n", pkt->getAddr(), pkt->getSize()); 83 84 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 85 86 Addr regnum = (pkt->getAddr() - pioAddr) >> 6; 87 Addr daddr = (pkt->getAddr() - pioAddr); 88 89 pkt->allocate(); 90 switch (pkt->getSize()) { 91 92 case sizeof(uint64_t): 93 pkt->set<uint64_t>(0); 94 95 if (daddr & TSDEV_CC_BDIMS) 96 { 97 pkt->set(dim[(daddr >> 4) & 0x3F]); 98 break; 99 } 100 101 if (daddr & TSDEV_CC_BDIRS) 102 { 103 pkt->set(dir[(daddr >> 4) & 0x3F]); 104 break; 105 } 106 107 switch(regnum) { 108 case TSDEV_CC_CSR: 109 pkt->set(0x0); 110 break; 111 case TSDEV_CC_MTR: 112 panic("TSDEV_CC_MTR not implemeted\n"); 113 break; 114 case TSDEV_CC_MISC: 115 pkt->set(((ipint << 8) & 0xF) | ((itint << 4) & 0xF) | 116 (pkt->req->contextId() & 0x3)); 117 // currently, FS cannot handle MT so contextId and 118 // cpuId are effectively the same, don't know if it will 119 // matter if FS becomes MT enabled. I suspect no because 120 // we are currently able to boot up to 64 procs anyway 121 // which would render the CPUID of this register useless 122 // anyway 123 break; 124 case TSDEV_CC_AAR0: 125 case TSDEV_CC_AAR1: 126 case TSDEV_CC_AAR2: 127 case TSDEV_CC_AAR3: 128 pkt->set(0); 129 break; 130 case TSDEV_CC_DIM0: 131 pkt->set(dim[0]); 132 break; 133 case TSDEV_CC_DIM1: 134 pkt->set(dim[1]); 135 break; 136 case TSDEV_CC_DIM2: 137 pkt->set(dim[2]); 138 break; 139 case TSDEV_CC_DIM3: 140 pkt->set(dim[3]); 141 break; 142 case TSDEV_CC_DIR0: 143 pkt->set(dir[0]); 144 break; 145 case TSDEV_CC_DIR1: 146 pkt->set(dir[1]); 147 break; 148 case TSDEV_CC_DIR2: 149 pkt->set(dir[2]); 150 break; 151 case TSDEV_CC_DIR3: 152 pkt->set(dir[3]); 153 break; 154 case TSDEV_CC_DRIR: 155 pkt->set(drir); 156 break; 157 case TSDEV_CC_PRBEN: 158 panic("TSDEV_CC_PRBEN not implemented\n"); 159 break; 160 case TSDEV_CC_IIC0: 161 case TSDEV_CC_IIC1: 162 case TSDEV_CC_IIC2: 163 case TSDEV_CC_IIC3: 164 panic("TSDEV_CC_IICx not implemented\n"); 165 break; 166 case TSDEV_CC_MPR0: 167 case TSDEV_CC_MPR1: 168 case TSDEV_CC_MPR2: 169 case TSDEV_CC_MPR3: 170 panic("TSDEV_CC_MPRx not implemented\n"); 171 break; 172 case TSDEV_CC_IPIR: 173 pkt->set(ipint); 174 break; 175 case TSDEV_CC_ITIR: 176 pkt->set(itint); 177 break; 178 default: 179 panic("default in cchip read reached, accessing 0x%x\n"); 180 } // uint64_t 181 182 break; 183 case sizeof(uint32_t): 184 case sizeof(uint16_t): 185 case sizeof(uint8_t): 186 default: 187 panic("invalid access size(?) for tsunami register!\n"); 188 } 189 DPRINTF(Tsunami, "Tsunami CChip: read regnum=%#x size=%d data=%lld\n", 190 regnum, pkt->getSize(), pkt->get<uint64_t>()); 191 192 pkt->makeAtomicResponse(); 193 return pioDelay; 194} 195 196Tick 197TsunamiCChip::write(PacketPtr pkt) 198{ 199 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 200 Addr daddr = pkt->getAddr() - pioAddr; 201 Addr regnum = (pkt->getAddr() - pioAddr) >> 6 ; 202 203 204 assert(pkt->getSize() == sizeof(uint64_t)); 205 206 DPRINTF(Tsunami, "write - addr=%#x value=%#x\n", pkt->getAddr(), pkt->get<uint64_t>()); 207 208 bool supportedWrite = false; 209 210 211 if (daddr & TSDEV_CC_BDIMS) 212 { 213 int number = (daddr >> 4) & 0x3F; 214 215 uint64_t bitvector; 216 uint64_t olddim; 217 uint64_t olddir; 218 219 olddim = dim[number]; 220 olddir = dir[number]; 221 dim[number] = pkt->get<uint64_t>(); 222 dir[number] = dim[number] & drir; 223 for(int x = 0; x < Tsunami::Max_CPUs; x++) 224 { 225 bitvector = ULL(1) << x; 226 // Figure out which bits have changed 227 if ((dim[number] & bitvector) != (olddim & bitvector)) 228 { 229 // The bit is now set and it wasn't before (set) 230 if((dim[number] & bitvector) && (dir[number] & bitvector)) 231 { 232 tsunami->intrctrl->post(number, TheISA::INTLEVEL_IRQ1, x); 233 DPRINTF(Tsunami, "dim write resulting in posting dir" 234 " interrupt to cpu %d\n", number); 235 } 236 else if ((olddir & bitvector) && 237 !(dir[number] & bitvector)) 238 { 239 // The bit was set and now its now clear and 240 // we were interrupting on that bit before 241 tsunami->intrctrl->clear(number, TheISA::INTLEVEL_IRQ1, x); 242 DPRINTF(Tsunami, "dim write resulting in clear" 243 " dir interrupt to cpu %d\n", number); 244 245 } 246 247 248 } 249 } 250 } else { 251 switch(regnum) { 252 case TSDEV_CC_CSR: 253 panic("TSDEV_CC_CSR write\n"); 254 case TSDEV_CC_MTR: 255 panic("TSDEV_CC_MTR write not implemented\n"); 256 case TSDEV_CC_MISC: 257 uint64_t ipreq; 258 ipreq = (pkt->get<uint64_t>() >> 12) & 0xF; 259 //If it is bit 12-15, this is an IPI post 260 if (ipreq) { 261 reqIPI(ipreq); 262 supportedWrite = true; 263 } 264 265 //If it is bit 8-11, this is an IPI clear 266 uint64_t ipintr; 267 ipintr = (pkt->get<uint64_t>() >> 8) & 0xF; 268 if (ipintr) { 269 clearIPI(ipintr); 270 supportedWrite = true; 271 } 272 273 //If it is the 4-7th bit, clear the RTC interrupt 274 uint64_t itintr; 275 itintr = (pkt->get<uint64_t>() >> 4) & 0xF; 276 if (itintr) { 277 clearITI(itintr); 278 supportedWrite = true; 279 } 280 281 // ignore NXMs 282 if (pkt->get<uint64_t>() & 0x10000000) 283 supportedWrite = true; 284 285 if(!supportedWrite) 286 panic("TSDEV_CC_MISC write not implemented\n"); 287 288 break; 289 case TSDEV_CC_AAR0: 290 case TSDEV_CC_AAR1: 291 case TSDEV_CC_AAR2: 292 case TSDEV_CC_AAR3: 293 panic("TSDEV_CC_AARx write not implemeted\n"); 294 case TSDEV_CC_DIM0: 295 case TSDEV_CC_DIM1: 296 case TSDEV_CC_DIM2: 297 case TSDEV_CC_DIM3: 298 int number; 299 if(regnum == TSDEV_CC_DIM0) 300 number = 0; 301 else if(regnum == TSDEV_CC_DIM1) 302 number = 1; 303 else if(regnum == TSDEV_CC_DIM2) 304 number = 2; 305 else 306 number = 3; 307 308 uint64_t bitvector; 309 uint64_t olddim; 310 uint64_t olddir; 311 312 olddim = dim[number]; 313 olddir = dir[number]; 314 dim[number] = pkt->get<uint64_t>(); 315 dir[number] = dim[number] & drir; 316 for(int x = 0; x < 64; x++) 317 { 318 bitvector = ULL(1) << x; 319 // Figure out which bits have changed 320 if ((dim[number] & bitvector) != (olddim & bitvector)) 321 { 322 // The bit is now set and it wasn't before (set) 323 if((dim[number] & bitvector) && (dir[number] & bitvector)) 324 { 325 tsunami->intrctrl->post(number, TheISA::INTLEVEL_IRQ1, x); 326 DPRINTF(Tsunami, "posting dir interrupt to cpu 0\n"); 327 } 328 else if ((olddir & bitvector) && 329 !(dir[number] & bitvector)) 330 { 331 // The bit was set and now its now clear and 332 // we were interrupting on that bit before 333 tsunami->intrctrl->clear(number, TheISA::INTLEVEL_IRQ1, x); 334 DPRINTF(Tsunami, "dim write resulting in clear" 335 " dir interrupt to cpu %d\n", 336 x); 337 338 } 339 340 341 } 342 } 343 break; 344 case TSDEV_CC_DIR0: 345 case TSDEV_CC_DIR1: 346 case TSDEV_CC_DIR2: 347 case TSDEV_CC_DIR3: 348 panic("TSDEV_CC_DIR write not implemented\n"); 349 case TSDEV_CC_DRIR: 350 panic("TSDEV_CC_DRIR write not implemented\n"); 351 case TSDEV_CC_PRBEN: 352 panic("TSDEV_CC_PRBEN write not implemented\n"); 353 case TSDEV_CC_IIC0: 354 case TSDEV_CC_IIC1: 355 case TSDEV_CC_IIC2: 356 case TSDEV_CC_IIC3: 357 panic("TSDEV_CC_IICx write not implemented\n"); 358 case TSDEV_CC_MPR0: 359 case TSDEV_CC_MPR1: 360 case TSDEV_CC_MPR2: 361 case TSDEV_CC_MPR3: 362 panic("TSDEV_CC_MPRx write not implemented\n"); 363 case TSDEV_CC_IPIR: 364 clearIPI(pkt->get<uint64_t>()); 365 break; 366 case TSDEV_CC_ITIR: 367 clearITI(pkt->get<uint64_t>()); 368 break; 369 case TSDEV_CC_IPIQ: 370 reqIPI(pkt->get<uint64_t>()); 371 break; 372 default: 373 panic("default in cchip read reached, accessing 0x%x\n"); 374 } // swtich(regnum) 375 } // not BIG_TSUNAMI write 376 pkt->makeAtomicResponse(); 377 return pioDelay; 378} 379 380void 381TsunamiCChip::clearIPI(uint64_t ipintr) 382{ 383 int numcpus = sys->threadContexts.size(); 384 assert(numcpus <= Tsunami::Max_CPUs); 385 386 if (ipintr) { 387 for (int cpunum=0; cpunum < numcpus; cpunum++) { 388 // Check each cpu bit 389 uint64_t cpumask = ULL(1) << cpunum; 390 if (ipintr & cpumask) { 391 // Check if there is a pending ipi 392 if (ipint & cpumask) { 393 ipint &= ~cpumask; 394 tsunami->intrctrl->clear(cpunum, TheISA::INTLEVEL_IRQ3, 0); 395 DPRINTF(IPI, "clear IPI IPI cpu=%d\n", cpunum); 396 } 397 else 398 warn("clear IPI for CPU=%d, but NO IPI\n", cpunum); 399 } 400 } 401 } 402 else 403 panic("Big IPI Clear, but not processors indicated\n"); 404} 405 406void 407TsunamiCChip::clearITI(uint64_t itintr) 408{ 409 int numcpus = sys->threadContexts.size(); 410 assert(numcpus <= Tsunami::Max_CPUs); 411 412 if (itintr) { 413 for (int i=0; i < numcpus; i++) { 414 uint64_t cpumask = ULL(1) << i; 415 if (itintr & cpumask & itint) { 416 tsunami->intrctrl->clear(i, TheISA::INTLEVEL_IRQ2, 0); 417 itint &= ~cpumask; 418 DPRINTF(Tsunami, "clearing rtc interrupt to cpu=%d\n", i); 419 } 420 } 421 } 422 else 423 panic("Big ITI Clear, but not processors indicated\n"); 424} 425 426void 427TsunamiCChip::reqIPI(uint64_t ipreq) 428{ 429 int numcpus = sys->threadContexts.size(); 430 assert(numcpus <= Tsunami::Max_CPUs); 431 432 if (ipreq) { 433 for (int cpunum=0; cpunum < numcpus; cpunum++) { 434 // Check each cpu bit 435 uint64_t cpumask = ULL(1) << cpunum; 436 if (ipreq & cpumask) { 437 // Check if there is already an ipi (bits 8:11) 438 if (!(ipint & cpumask)) { 439 ipint |= cpumask; 440 tsunami->intrctrl->post(cpunum, TheISA::INTLEVEL_IRQ3, 0); 441 DPRINTF(IPI, "send IPI cpu=%d\n", cpunum); 442 } 443 else 444 warn("post IPI for CPU=%d, but IPI already\n", cpunum); 445 } 446 } 447 } 448 else 449 panic("Big IPI Request, but not processors indicated\n"); 450} 451 452 453void 454TsunamiCChip::postRTC() 455{ 456 int size = sys->threadContexts.size(); 457 assert(size <= Tsunami::Max_CPUs); 458 459 for (int i = 0; i < size; i++) { 460 uint64_t cpumask = ULL(1) << i; 461 if (!(cpumask & itint)) { 462 itint |= cpumask; 463 tsunami->intrctrl->post(i, TheISA::INTLEVEL_IRQ2, 0); 464 DPRINTF(Tsunami, "Posting RTC interrupt to cpu=%d\n", i); 465 } 466 } 467 468} 469 470void 471TsunamiCChip::postDRIR(uint32_t interrupt) 472{ 473 uint64_t bitvector = ULL(1) << interrupt; 474 uint64_t size = sys->threadContexts.size(); 475 assert(size <= Tsunami::Max_CPUs); 476 drir |= bitvector; 477 478 for(int i=0; i < size; i++) { 479 dir[i] = dim[i] & drir; 480 if (dim[i] & bitvector) { 481 tsunami->intrctrl->post(i, TheISA::INTLEVEL_IRQ1, interrupt); 482 DPRINTF(Tsunami, "posting dir interrupt to cpu %d," 483 "interrupt %d\n",i, interrupt); 484 } 485 } 486} 487 488void 489TsunamiCChip::clearDRIR(uint32_t interrupt) 490{ 491 uint64_t bitvector = ULL(1) << interrupt; 492 uint64_t size = sys->threadContexts.size(); 493 assert(size <= Tsunami::Max_CPUs); 494 495 if (drir & bitvector) 496 { 497 drir &= ~bitvector; 498 for(int i=0; i < size; i++) { 499 if (dir[i] & bitvector) { 500 tsunami->intrctrl->clear(i, TheISA::INTLEVEL_IRQ1, interrupt); 501 DPRINTF(Tsunami, "clearing dir interrupt to cpu %d," 502 "interrupt %d\n",i, interrupt); 503 504 } 505 dir[i] = dim[i] & drir; 506 } 507 } 508 else 509 DPRINTF(Tsunami, "Spurrious clear? interrupt %d\n", interrupt); 510} 511 512 513void 514TsunamiCChip::serialize(std::ostream &os) 515{ 516 SERIALIZE_ARRAY(dim, Tsunami::Max_CPUs); 517 SERIALIZE_ARRAY(dir, Tsunami::Max_CPUs); 518 SERIALIZE_SCALAR(ipint); 519 SERIALIZE_SCALAR(itint); 520 SERIALIZE_SCALAR(drir); 521} 522 523void 524TsunamiCChip::unserialize(Checkpoint *cp, const std::string §ion) 525{ 526 UNSERIALIZE_ARRAY(dim, Tsunami::Max_CPUs); 527 UNSERIALIZE_ARRAY(dir, Tsunami::Max_CPUs); 528 UNSERIALIZE_SCALAR(ipint); 529 UNSERIALIZE_SCALAR(itint); 530 UNSERIALIZE_SCALAR(drir); 531} 532 533TsunamiCChip * 534TsunamiCChipParams::create() 535{ 536 return new TsunamiCChip(this); 537} 538