exec_context.hh revision 13557
1/* 2 * Copyright (c) 2011-2014, 2016 ARM Limited 3 * Copyright (c) 2013 Advanced Micro Devices, Inc. 4 * All rights reserved 5 * 6 * The license below extends only to copyright in the software and shall 7 * not be construed as granting a license to any other intellectual 8 * property including but not limited to intellectual property relating 9 * to a hardware implementation of the functionality of the software 10 * licensed hereunder. You may use the software subject to the license 11 * terms below provided that you ensure that this notice is replicated 12 * unmodified and in its entirety in all distributions of the software, 13 * modified or unmodified, in source code or in binary form. 14 * 15 * Copyright (c) 2002-2005 The Regents of The University of Michigan 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Steve Reinhardt 42 * Dave Greene 43 * Nathan Binkert 44 * Andrew Bardsley 45 */ 46 47/** 48 * @file 49 * 50 * ExecContext bears the exec_context interface for Minor. 51 */ 52 53#ifndef __CPU_MINOR_EXEC_CONTEXT_HH__ 54#define __CPU_MINOR_EXEC_CONTEXT_HH__ 55 56#include "cpu/exec_context.hh" 57#include "cpu/minor/execute.hh" 58#include "cpu/minor/pipeline.hh" 59#include "cpu/base.hh" 60#include "cpu/simple_thread.hh" 61#include "mem/request.hh" 62#include "debug/MinorExecute.hh" 63 64namespace Minor 65{ 66 67/* Forward declaration of Execute */ 68class Execute; 69 70/** ExecContext bears the exec_context interface for Minor. This nicely 71 * separates that interface from other classes such as Pipeline, MinorCPU 72 * and DynMinorInst and makes it easier to see what state is accessed by it. 73 */ 74class ExecContext : public ::ExecContext 75{ 76 public: 77 MinorCPU &cpu; 78 79 /** ThreadState object, provides all the architectural state. */ 80 SimpleThread &thread; 81 82 /** The execute stage so we can peek at its contents. */ 83 Execute &execute; 84 85 /** Instruction for the benefit of memory operations and for PC */ 86 MinorDynInstPtr inst; 87 88 ExecContext ( 89 MinorCPU &cpu_, 90 SimpleThread &thread_, Execute &execute_, 91 MinorDynInstPtr inst_) : 92 cpu(cpu_), 93 thread(thread_), 94 execute(execute_), 95 inst(inst_) 96 { 97 DPRINTF(MinorExecute, "ExecContext setting PC: %s\n", inst->pc); 98 pcState(inst->pc); 99 setPredicate(true); 100 thread.setIntReg(TheISA::ZeroReg, 0); 101#if THE_ISA == ALPHA_ISA 102 thread.setFloatRegBits(TheISA::ZeroReg, 0); 103#endif 104 } 105 106 Fault 107 initiateMemRead(Addr addr, unsigned int size, 108 Request::Flags flags) override 109 { 110 execute.getLSQ().pushRequest(inst, true /* load */, nullptr, 111 size, addr, flags, NULL); 112 return NoFault; 113 } 114 115 Fault 116 writeMem(uint8_t *data, unsigned int size, Addr addr, 117 Request::Flags flags, uint64_t *res) override 118 { 119 execute.getLSQ().pushRequest(inst, false /* store */, data, 120 size, addr, flags, res); 121 return NoFault; 122 } 123 124 RegVal 125 readIntRegOperand(const StaticInst *si, int idx) override 126 { 127 const RegId& reg = si->srcRegIdx(idx); 128 assert(reg.isIntReg()); 129 return thread.readIntReg(reg.index()); 130 } 131 132 RegVal 133 readFloatRegOperandBits(const StaticInst *si, int idx) override 134 { 135 const RegId& reg = si->srcRegIdx(idx); 136 assert(reg.isFloatReg()); 137 return thread.readFloatRegBits(reg.index()); 138 } 139 140 const TheISA::VecRegContainer & 141 readVecRegOperand(const StaticInst *si, int idx) const override 142 { 143 const RegId& reg = si->srcRegIdx(idx); 144 assert(reg.isVecReg()); 145 return thread.readVecReg(reg); 146 } 147 148 TheISA::VecRegContainer & 149 getWritableVecRegOperand(const StaticInst *si, int idx) override 150 { 151 const RegId& reg = si->destRegIdx(idx); 152 assert(reg.isVecReg()); 153 return thread.getWritableVecReg(reg); 154 } 155 156 TheISA::VecElem 157 readVecElemOperand(const StaticInst *si, int idx) const override 158 { 159 const RegId& reg = si->srcRegIdx(idx); 160 assert(reg.isVecReg()); 161 return thread.readVecElem(reg); 162 } 163 164 void 165 setIntRegOperand(const StaticInst *si, int idx, RegVal val) override 166 { 167 const RegId& reg = si->destRegIdx(idx); 168 assert(reg.isIntReg()); 169 thread.setIntReg(reg.index(), val); 170 } 171 172 void 173 setFloatRegOperandBits(const StaticInst *si, int idx, RegVal val) override 174 { 175 const RegId& reg = si->destRegIdx(idx); 176 assert(reg.isFloatReg()); 177 thread.setFloatRegBits(reg.index(), val); 178 } 179 180 void 181 setVecRegOperand(const StaticInst *si, int idx, 182 const TheISA::VecRegContainer& val) override 183 { 184 const RegId& reg = si->destRegIdx(idx); 185 assert(reg.isVecReg()); 186 thread.setVecReg(reg, val); 187 } 188 189 /** Vector Register Lane Interfaces. */ 190 /** @{ */ 191 /** Reads source vector 8bit operand. */ 192 ConstVecLane8 193 readVec8BitLaneOperand(const StaticInst *si, int idx) const 194 override 195 { 196 const RegId& reg = si->srcRegIdx(idx); 197 assert(reg.isVecReg()); 198 return thread.readVec8BitLaneReg(reg); 199 } 200 201 /** Reads source vector 16bit operand. */ 202 ConstVecLane16 203 readVec16BitLaneOperand(const StaticInst *si, int idx) const 204 override 205 { 206 const RegId& reg = si->srcRegIdx(idx); 207 assert(reg.isVecReg()); 208 return thread.readVec16BitLaneReg(reg); 209 } 210 211 /** Reads source vector 32bit operand. */ 212 ConstVecLane32 213 readVec32BitLaneOperand(const StaticInst *si, int idx) const 214 override 215 { 216 const RegId& reg = si->srcRegIdx(idx); 217 assert(reg.isVecReg()); 218 return thread.readVec32BitLaneReg(reg); 219 } 220 221 /** Reads source vector 64bit operand. */ 222 ConstVecLane64 223 readVec64BitLaneOperand(const StaticInst *si, int idx) const 224 override 225 { 226 const RegId& reg = si->srcRegIdx(idx); 227 assert(reg.isVecReg()); 228 return thread.readVec64BitLaneReg(reg); 229 } 230 231 /** Write a lane of the destination vector operand. */ 232 template <typename LD> 233 void 234 setVecLaneOperandT(const StaticInst *si, int idx, const LD& val) 235 { 236 const RegId& reg = si->destRegIdx(idx); 237 assert(reg.isVecReg()); 238 return thread.setVecLane(reg, val); 239 } 240 virtual void 241 setVecLaneOperand(const StaticInst *si, int idx, 242 const LaneData<LaneSize::Byte>& val) override 243 { 244 setVecLaneOperandT(si, idx, val); 245 } 246 virtual void 247 setVecLaneOperand(const StaticInst *si, int idx, 248 const LaneData<LaneSize::TwoByte>& val) override 249 { 250 setVecLaneOperandT(si, idx, val); 251 } 252 virtual void 253 setVecLaneOperand(const StaticInst *si, int idx, 254 const LaneData<LaneSize::FourByte>& val) override 255 { 256 setVecLaneOperandT(si, idx, val); 257 } 258 virtual void 259 setVecLaneOperand(const StaticInst *si, int idx, 260 const LaneData<LaneSize::EightByte>& val) override 261 { 262 setVecLaneOperandT(si, idx, val); 263 } 264 /** @} */ 265 266 void 267 setVecElemOperand(const StaticInst *si, int idx, 268 const TheISA::VecElem val) override 269 { 270 const RegId& reg = si->destRegIdx(idx); 271 assert(reg.isVecReg()); 272 thread.setVecElem(reg, val); 273 } 274 275 bool 276 readPredicate() const override 277 { 278 return thread.readPredicate(); 279 } 280 281 void 282 setPredicate(bool val) override 283 { 284 thread.setPredicate(val); 285 } 286 287 TheISA::PCState 288 pcState() const override 289 { 290 return thread.pcState(); 291 } 292 293 void 294 pcState(const TheISA::PCState &val) override 295 { 296 thread.pcState(val); 297 } 298 299 RegVal 300 readMiscRegNoEffect(int misc_reg) const 301 { 302 return thread.readMiscRegNoEffect(misc_reg); 303 } 304 305 RegVal 306 readMiscReg(int misc_reg) override 307 { 308 return thread.readMiscReg(misc_reg); 309 } 310 311 void 312 setMiscReg(int misc_reg, const RegVal &val) override 313 { 314 thread.setMiscReg(misc_reg, val); 315 } 316 317 RegVal 318 readMiscRegOperand(const StaticInst *si, int idx) override 319 { 320 const RegId& reg = si->srcRegIdx(idx); 321 assert(reg.isMiscReg()); 322 return thread.readMiscReg(reg.index()); 323 } 324 325 void 326 setMiscRegOperand(const StaticInst *si, int idx, 327 const RegVal &val) override 328 { 329 const RegId& reg = si->destRegIdx(idx); 330 assert(reg.isMiscReg()); 331 return thread.setMiscReg(reg.index(), val); 332 } 333 334 Fault 335 hwrei() override 336 { 337#if THE_ISA == ALPHA_ISA 338 return thread.hwrei(); 339#else 340 return NoFault; 341#endif 342 } 343 344 bool 345 simPalCheck(int palFunc) override 346 { 347#if THE_ISA == ALPHA_ISA 348 return thread.simPalCheck(palFunc); 349#else 350 return false; 351#endif 352 } 353 354 void 355 syscall(int64_t callnum, Fault *fault) override 356 { 357 if (FullSystem) 358 panic("Syscall emulation isn't available in FS mode.\n"); 359 360 thread.syscall(callnum, fault); 361 } 362 363 ThreadContext *tcBase() override { return thread.getTC(); } 364 365 /* @todo, should make stCondFailures persistent somewhere */ 366 unsigned int readStCondFailures() const override { return 0; } 367 void setStCondFailures(unsigned int st_cond_failures) override {} 368 369 ContextID contextId() { return thread.contextId(); } 370 /* ISA-specific (or at least currently ISA singleton) functions */ 371 372 /* X86: TLB twiddling */ 373 void 374 demapPage(Addr vaddr, uint64_t asn) override 375 { 376 thread.getITBPtr()->demapPage(vaddr, asn); 377 thread.getDTBPtr()->demapPage(vaddr, asn); 378 } 379 380 TheISA::CCReg 381 readCCRegOperand(const StaticInst *si, int idx) override 382 { 383 const RegId& reg = si->srcRegIdx(idx); 384 assert(reg.isCCReg()); 385 return thread.readCCReg(reg.index()); 386 } 387 388 void 389 setCCRegOperand(const StaticInst *si, int idx, TheISA::CCReg val) override 390 { 391 const RegId& reg = si->destRegIdx(idx); 392 assert(reg.isCCReg()); 393 thread.setCCReg(reg.index(), val); 394 } 395 396 void 397 demapInstPage(Addr vaddr, uint64_t asn) 398 { 399 thread.getITBPtr()->demapPage(vaddr, asn); 400 } 401 402 void 403 demapDataPage(Addr vaddr, uint64_t asn) 404 { 405 thread.getDTBPtr()->demapPage(vaddr, asn); 406 } 407 408 BaseCPU *getCpuPtr() { return &cpu; } 409 410 /* MIPS: other thread register reading/writing */ 411 RegVal 412 readRegOtherThread(const RegId ®, ThreadID tid=InvalidThreadID) 413 { 414 SimpleThread *other_thread = (tid == InvalidThreadID 415 ? &thread : cpu.threads[tid]); 416 417 switch (reg.classValue()) { 418 case IntRegClass: 419 return other_thread->readIntReg(reg.index()); 420 break; 421 case FloatRegClass: 422 return other_thread->readFloatRegBits(reg.index()); 423 break; 424 case MiscRegClass: 425 return other_thread->readMiscReg(reg.index()); 426 default: 427 panic("Unexpected reg class! (%s)", 428 reg.className()); 429 return 0; 430 } 431 } 432 433 void 434 setRegOtherThread(const RegId ®, const RegVal &val, 435 ThreadID tid=InvalidThreadID) 436 { 437 SimpleThread *other_thread = (tid == InvalidThreadID 438 ? &thread : cpu.threads[tid]); 439 440 switch (reg.classValue()) { 441 case IntRegClass: 442 return other_thread->setIntReg(reg.index(), val); 443 break; 444 case FloatRegClass: 445 return other_thread->setFloatRegBits(reg.index(), val); 446 break; 447 case MiscRegClass: 448 return other_thread->setMiscReg(reg.index(), val); 449 default: 450 panic("Unexpected reg class! (%s)", 451 reg.className()); 452 } 453 } 454 455 public: 456 // monitor/mwait funtions 457 void armMonitor(Addr address) override 458 { getCpuPtr()->armMonitor(inst->id.threadId, address); } 459 460 bool mwait(PacketPtr pkt) override 461 { return getCpuPtr()->mwait(inst->id.threadId, pkt); } 462 463 void mwaitAtomic(ThreadContext *tc) override 464 { return getCpuPtr()->mwaitAtomic(inst->id.threadId, tc, thread.dtb); } 465 466 AddressMonitor *getAddrMonitor() override 467 { return getCpuPtr()->getCpuAddrMonitor(inst->id.threadId); } 468}; 469 470} 471 472#endif /* __CPU_MINOR_EXEC_CONTEXT_HH__ */ 473