simple_thread.hh revision 8852:c744483edfcf
1/* 2 * Copyright (c) 2011 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2001-2006 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Steve Reinhardt 41 * Nathan Binkert 42 */ 43 44#ifndef __CPU_SIMPLE_THREAD_HH__ 45#define __CPU_SIMPLE_THREAD_HH__ 46 47#include "arch/isa.hh" 48#include "arch/isa_traits.hh" 49#include "arch/registers.hh" 50#include "arch/tlb.hh" 51#include "arch/types.hh" 52#include "base/types.hh" 53#include "config/the_isa.hh" 54#include "config/use_checker.hh" 55#include "cpu/decode.hh" 56#include "cpu/thread_context.hh" 57#include "cpu/thread_state.hh" 58#include "debug/FloatRegs.hh" 59#include "debug/IntRegs.hh" 60#include "mem/page_table.hh" 61#include "mem/request.hh" 62#include "sim/byteswap.hh" 63#include "sim/eventq.hh" 64#include "sim/process.hh" 65#include "sim/serialize.hh" 66#include "sim/system.hh" 67 68class BaseCPU; 69 70 71class FunctionProfile; 72class ProfileNode; 73 74namespace TheISA { 75 namespace Kernel { 76 class Statistics; 77 }; 78}; 79 80/** 81 * The SimpleThread object provides a combination of the ThreadState 82 * object and the ThreadContext interface. It implements the 83 * ThreadContext interface so that a ProxyThreadContext class can be 84 * made using SimpleThread as the template parameter (see 85 * thread_context.hh). It adds to the ThreadState object by adding all 86 * the objects needed for simple functional execution, including a 87 * simple architectural register file, and pointers to the ITB and DTB 88 * in full system mode. For CPU models that do not need more advanced 89 * ways to hold state (i.e. a separate physical register file, or 90 * separate fetch and commit PC's), this SimpleThread class provides 91 * all the necessary state for full architecture-level functional 92 * simulation. See the AtomicSimpleCPU or TimingSimpleCPU for 93 * examples. 94 */ 95 96class SimpleThread : public ThreadState 97{ 98 protected: 99 typedef TheISA::MachInst MachInst; 100 typedef TheISA::MiscReg MiscReg; 101 typedef TheISA::FloatReg FloatReg; 102 typedef TheISA::FloatRegBits FloatRegBits; 103 public: 104 typedef ThreadContext::Status Status; 105 106 protected: 107 union { 108 FloatReg f[TheISA::NumFloatRegs]; 109 FloatRegBits i[TheISA::NumFloatRegs]; 110 } floatRegs; 111 TheISA::IntReg intRegs[TheISA::NumIntRegs]; 112 TheISA::ISA isa; // one "instance" of the current ISA. 113 114 TheISA::PCState _pcState; 115 116 /** Did this instruction execute or is it predicated false */ 117 bool predicate; 118 119 public: 120 std::string name() const 121 { 122 return csprintf("%s.[tid:%i]", baseCpu->name(), tc->threadId()); 123 } 124 125 ProxyThreadContext<SimpleThread> *tc; 126 127 System *system; 128 129 TheISA::TLB *itb; 130 TheISA::TLB *dtb; 131 132 Decoder decoder; 133 134 // constructor: initialize SimpleThread from given process structure 135 // FS 136 SimpleThread(BaseCPU *_cpu, int _thread_num, System *_system, 137 TheISA::TLB *_itb, TheISA::TLB *_dtb, 138 bool use_kernel_stats = true); 139 // SE 140 SimpleThread(BaseCPU *_cpu, int _thread_num, System *_system, 141 Process *_process, TheISA::TLB *_itb, TheISA::TLB *_dtb); 142 143 SimpleThread(); 144 145 virtual ~SimpleThread(); 146 147 virtual void takeOverFrom(ThreadContext *oldContext); 148 149 void regStats(const std::string &name); 150 151 void copyTC(ThreadContext *context); 152 153 void copyState(ThreadContext *oldContext); 154 155 void serialize(std::ostream &os); 156 void unserialize(Checkpoint *cp, const std::string §ion); 157 158 /*************************************************************** 159 * SimpleThread functions to provide CPU with access to various 160 * state. 161 **************************************************************/ 162 163 /** Returns the pointer to this SimpleThread's ThreadContext. Used 164 * when a ThreadContext must be passed to objects outside of the 165 * CPU. 166 */ 167 ThreadContext *getTC() { return tc; } 168 169 void demapPage(Addr vaddr, uint64_t asn) 170 { 171 itb->demapPage(vaddr, asn); 172 dtb->demapPage(vaddr, asn); 173 } 174 175 void demapInstPage(Addr vaddr, uint64_t asn) 176 { 177 itb->demapPage(vaddr, asn); 178 } 179 180 void demapDataPage(Addr vaddr, uint64_t asn) 181 { 182 dtb->demapPage(vaddr, asn); 183 } 184 185 void dumpFuncProfile(); 186 187 Fault hwrei(); 188 189 bool simPalCheck(int palFunc); 190 191 /******************************************* 192 * ThreadContext interface functions. 193 ******************************************/ 194 195 BaseCPU *getCpuPtr() { return baseCpu; } 196 197 TheISA::TLB *getITBPtr() { return itb; } 198 199 TheISA::TLB *getDTBPtr() { return dtb; } 200 201#if USE_CHECKER 202 BaseCPU *getCheckerCpuPtr() { return NULL; } 203#endif 204 205 Decoder *getDecoderPtr() { return &decoder; } 206 207 System *getSystemPtr() { return system; } 208 209 Status status() const { return _status; } 210 211 void setStatus(Status newStatus) { _status = newStatus; } 212 213 /// Set the status to Active. Optional delay indicates number of 214 /// cycles to wait before beginning execution. 215 void activate(int delay = 1); 216 217 /// Set the status to Suspended. 218 void suspend(); 219 220 /// Set the status to Halted. 221 void halt(); 222 223 virtual bool misspeculating(); 224 225 void copyArchRegs(ThreadContext *tc); 226 227 void clearArchRegs() 228 { 229 _pcState = 0; 230 memset(intRegs, 0, sizeof(intRegs)); 231 memset(floatRegs.i, 0, sizeof(floatRegs.i)); 232 isa.clear(); 233 } 234 235 // 236 // New accessors for new decoder. 237 // 238 uint64_t readIntReg(int reg_idx) 239 { 240 int flatIndex = isa.flattenIntIndex(reg_idx); 241 assert(flatIndex < TheISA::NumIntRegs); 242 uint64_t regVal = intRegs[flatIndex]; 243 DPRINTF(IntRegs, "Reading int reg %d (%d) as %#x.\n", 244 reg_idx, flatIndex, regVal); 245 return regVal; 246 } 247 248 FloatReg readFloatReg(int reg_idx) 249 { 250 int flatIndex = isa.flattenFloatIndex(reg_idx); 251 assert(flatIndex < TheISA::NumFloatRegs); 252 FloatReg regVal = floatRegs.f[flatIndex]; 253 DPRINTF(FloatRegs, "Reading float reg %d (%d) as %f, %#x.\n", 254 reg_idx, flatIndex, regVal, floatRegs.i[flatIndex]); 255 return regVal; 256 } 257 258 FloatRegBits readFloatRegBits(int reg_idx) 259 { 260 int flatIndex = isa.flattenFloatIndex(reg_idx); 261 assert(flatIndex < TheISA::NumFloatRegs); 262 FloatRegBits regVal = floatRegs.i[flatIndex]; 263 DPRINTF(FloatRegs, "Reading float reg %d (%d) bits as %#x, %f.\n", 264 reg_idx, flatIndex, regVal, floatRegs.f[flatIndex]); 265 return regVal; 266 } 267 268 void setIntReg(int reg_idx, uint64_t val) 269 { 270 int flatIndex = isa.flattenIntIndex(reg_idx); 271 assert(flatIndex < TheISA::NumIntRegs); 272 DPRINTF(IntRegs, "Setting int reg %d (%d) to %#x.\n", 273 reg_idx, flatIndex, val); 274 intRegs[flatIndex] = val; 275 } 276 277 void setFloatReg(int reg_idx, FloatReg val) 278 { 279 int flatIndex = isa.flattenFloatIndex(reg_idx); 280 assert(flatIndex < TheISA::NumFloatRegs); 281 floatRegs.f[flatIndex] = val; 282 DPRINTF(FloatRegs, "Setting float reg %d (%d) to %f, %#x.\n", 283 reg_idx, flatIndex, val, floatRegs.i[flatIndex]); 284 } 285 286 void setFloatRegBits(int reg_idx, FloatRegBits val) 287 { 288 int flatIndex = isa.flattenFloatIndex(reg_idx); 289 assert(flatIndex < TheISA::NumFloatRegs); 290 // XXX: Fix array out of bounds compiler error for gem5.fast 291 // when checkercpu enabled 292 if (flatIndex < TheISA::NumFloatRegs) 293 floatRegs.i[flatIndex] = val; 294 DPRINTF(FloatRegs, "Setting float reg %d (%d) bits to %#x, %#f.\n", 295 reg_idx, flatIndex, val, floatRegs.f[flatIndex]); 296 } 297 298 TheISA::PCState 299 pcState() 300 { 301 return _pcState; 302 } 303 304 void 305 pcState(const TheISA::PCState &val) 306 { 307 _pcState = val; 308 } 309 310#if USE_CHECKER 311 void 312 pcStateNoRecord(const TheISA::PCState &val) 313 { 314 _pcState = val; 315 } 316#endif 317 318 Addr 319 instAddr() 320 { 321 return _pcState.instAddr(); 322 } 323 324 Addr 325 nextInstAddr() 326 { 327 return _pcState.nextInstAddr(); 328 } 329 330 MicroPC 331 microPC() 332 { 333 return _pcState.microPC(); 334 } 335 336 bool readPredicate() 337 { 338 return predicate; 339 } 340 341 void setPredicate(bool val) 342 { 343 predicate = val; 344 } 345 346 MiscReg 347 readMiscRegNoEffect(int misc_reg, ThreadID tid = 0) 348 { 349 return isa.readMiscRegNoEffect(misc_reg); 350 } 351 352 MiscReg 353 readMiscReg(int misc_reg, ThreadID tid = 0) 354 { 355 return isa.readMiscReg(misc_reg, tc); 356 } 357 358 void 359 setMiscRegNoEffect(int misc_reg, const MiscReg &val, ThreadID tid = 0) 360 { 361 return isa.setMiscRegNoEffect(misc_reg, val); 362 } 363 364 void 365 setMiscReg(int misc_reg, const MiscReg &val, ThreadID tid = 0) 366 { 367 return isa.setMiscReg(misc_reg, val, tc); 368 } 369 370 int 371 flattenIntIndex(int reg) 372 { 373 return isa.flattenIntIndex(reg); 374 } 375 376 int 377 flattenFloatIndex(int reg) 378 { 379 return isa.flattenFloatIndex(reg); 380 } 381 382 unsigned readStCondFailures() { return storeCondFailures; } 383 384 void setStCondFailures(unsigned sc_failures) 385 { storeCondFailures = sc_failures; } 386 387 void syscall(int64_t callnum) 388 { 389 process->syscall(callnum, tc); 390 } 391}; 392 393 394// for non-speculative execution context, spec_mode is always false 395inline bool 396SimpleThread::misspeculating() 397{ 398 return false; 399} 400 401#endif // __CPU_CPU_EXEC_CONTEXT_HH__ 402