simple_thread.hh revision 6313
1/* 2 * Copyright (c) 2001-2006 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: Steve Reinhardt 29 * Nathan Binkert 30 */ 31 32#ifndef __CPU_SIMPLE_THREAD_HH__ 33#define __CPU_SIMPLE_THREAD_HH__ 34 35#include "arch/isa.hh" 36#include "arch/isa_traits.hh" 37#include "arch/regfile.hh" 38#include "arch/tlb.hh" 39#include "base/types.hh" 40#include "config/full_system.hh" 41#include "cpu/thread_context.hh" 42#include "cpu/thread_state.hh" 43#include "mem/request.hh" 44#include "sim/byteswap.hh" 45#include "sim/eventq.hh" 46#include "sim/serialize.hh" 47 48class BaseCPU; 49 50#if FULL_SYSTEM 51 52#include "sim/system.hh" 53 54class FunctionProfile; 55class ProfileNode; 56class FunctionalPort; 57class PhysicalPort; 58 59namespace TheISA { 60 namespace Kernel { 61 class Statistics; 62 }; 63}; 64 65#else // !FULL_SYSTEM 66 67#include "sim/process.hh" 68#include "mem/page_table.hh" 69class TranslatingPort; 70 71#endif // FULL_SYSTEM 72 73/** 74 * The SimpleThread object provides a combination of the ThreadState 75 * object and the ThreadContext interface. It implements the 76 * ThreadContext interface so that a ProxyThreadContext class can be 77 * made using SimpleThread as the template parameter (see 78 * thread_context.hh). It adds to the ThreadState object by adding all 79 * the objects needed for simple functional execution, including a 80 * simple architectural register file, and pointers to the ITB and DTB 81 * in full system mode. For CPU models that do not need more advanced 82 * ways to hold state (i.e. a separate physical register file, or 83 * separate fetch and commit PC's), this SimpleThread class provides 84 * all the necessary state for full architecture-level functional 85 * simulation. See the AtomicSimpleCPU or TimingSimpleCPU for 86 * examples. 87 */ 88 89class SimpleThread : public ThreadState 90{ 91 protected: 92 typedef TheISA::RegFile RegFile; 93 typedef TheISA::MachInst MachInst; 94 typedef TheISA::MiscReg MiscReg; 95 typedef TheISA::FloatReg FloatReg; 96 typedef TheISA::FloatRegBits FloatRegBits; 97 public: 98 typedef ThreadContext::Status Status; 99 100 protected: 101 RegFile regs; // correct-path register context 102 TheISA::ISA isa; // one "instance" of the current ISA. 103 104 public: 105 // pointer to CPU associated with this SimpleThread 106 BaseCPU *cpu; 107 108 ProxyThreadContext<SimpleThread> *tc; 109 110 System *system; 111 112 TheISA::TLB *itb; 113 TheISA::TLB *dtb; 114 115 // constructor: initialize SimpleThread from given process structure 116#if FULL_SYSTEM 117 SimpleThread(BaseCPU *_cpu, int _thread_num, System *_system, 118 TheISA::TLB *_itb, TheISA::TLB *_dtb, 119 bool use_kernel_stats = true); 120#else 121 SimpleThread(BaseCPU *_cpu, int _thread_num, Process *_process, 122 TheISA::TLB *_itb, TheISA::TLB *_dtb, int _asid); 123#endif 124 125 SimpleThread(); 126 127 virtual ~SimpleThread(); 128 129 virtual void takeOverFrom(ThreadContext *oldContext); 130 131 void regStats(const std::string &name); 132 133 void copyTC(ThreadContext *context); 134 135 void copyState(ThreadContext *oldContext); 136 137 void serialize(std::ostream &os); 138 void unserialize(Checkpoint *cp, const std::string §ion); 139 140 /*************************************************************** 141 * SimpleThread functions to provide CPU with access to various 142 * state. 143 **************************************************************/ 144 145 /** Returns the pointer to this SimpleThread's ThreadContext. Used 146 * when a ThreadContext must be passed to objects outside of the 147 * CPU. 148 */ 149 ThreadContext *getTC() { return tc; } 150 151 void demapPage(Addr vaddr, uint64_t asn) 152 { 153 itb->demapPage(vaddr, asn); 154 dtb->demapPage(vaddr, asn); 155 } 156 157 void demapInstPage(Addr vaddr, uint64_t asn) 158 { 159 itb->demapPage(vaddr, asn); 160 } 161 162 void demapDataPage(Addr vaddr, uint64_t asn) 163 { 164 dtb->demapPage(vaddr, asn); 165 } 166 167#if FULL_SYSTEM 168 int getInstAsid() { return isa.instAsid(); } 169 int getDataAsid() { return isa.dataAsid(); } 170 171 void dumpFuncProfile(); 172 173 Fault hwrei(); 174 175 bool simPalCheck(int palFunc); 176 177#endif 178 179 /******************************************* 180 * ThreadContext interface functions. 181 ******************************************/ 182 183 BaseCPU *getCpuPtr() { return cpu; } 184 185 TheISA::TLB *getITBPtr() { return itb; } 186 187 TheISA::TLB *getDTBPtr() { return dtb; } 188 189 System *getSystemPtr() { return system; } 190 191#if FULL_SYSTEM 192 FunctionalPort *getPhysPort() { return physPort; } 193 194 /** Return a virtual port. This port cannot be cached locally in an object. 195 * After a CPU switch it may point to the wrong memory object which could 196 * mean stale data. 197 */ 198 VirtualPort *getVirtPort() { return virtPort; } 199#endif 200 201 Status status() const { return _status; } 202 203 void setStatus(Status newStatus) { _status = newStatus; } 204 205 /// Set the status to Active. Optional delay indicates number of 206 /// cycles to wait before beginning execution. 207 void activate(int delay = 1); 208 209 /// Set the status to Suspended. 210 void suspend(); 211 212 /// Set the status to Halted. 213 void halt(); 214 215 virtual bool misspeculating(); 216 217 Fault instRead(RequestPtr &req) 218 { 219 panic("instRead not implemented"); 220 // return funcPhysMem->read(req, inst); 221 return NoFault; 222 } 223 224 void copyArchRegs(ThreadContext *tc); 225 226 void clearArchRegs() { regs.clear(); } 227 228 // 229 // New accessors for new decoder. 230 // 231 uint64_t readIntReg(int reg_idx) 232 { 233 int flatIndex = isa.flattenIntIndex(reg_idx); 234 return regs.readIntReg(flatIndex); 235 } 236 237 FloatReg readFloatReg(int reg_idx, int width) 238 { 239 int flatIndex = isa.flattenFloatIndex(reg_idx); 240 return regs.readFloatReg(flatIndex, width); 241 } 242 243 FloatReg readFloatReg(int reg_idx) 244 { 245 int flatIndex = isa.flattenFloatIndex(reg_idx); 246 return regs.readFloatReg(flatIndex); 247 } 248 249 FloatRegBits readFloatRegBits(int reg_idx, int width) 250 { 251 int flatIndex = isa.flattenFloatIndex(reg_idx); 252 return regs.readFloatRegBits(flatIndex, width); 253 } 254 255 FloatRegBits readFloatRegBits(int reg_idx) 256 { 257 int flatIndex = isa.flattenFloatIndex(reg_idx); 258 return regs.readFloatRegBits(flatIndex); 259 } 260 261 void setIntReg(int reg_idx, uint64_t val) 262 { 263 int flatIndex = isa.flattenIntIndex(reg_idx); 264 regs.setIntReg(flatIndex, val); 265 } 266 267 void setFloatReg(int reg_idx, FloatReg val, int width) 268 { 269 int flatIndex = isa.flattenFloatIndex(reg_idx); 270 regs.setFloatReg(flatIndex, val, width); 271 } 272 273 void setFloatReg(int reg_idx, FloatReg val) 274 { 275 int flatIndex = isa.flattenFloatIndex(reg_idx); 276 regs.setFloatReg(flatIndex, val); 277 } 278 279 void setFloatRegBits(int reg_idx, FloatRegBits val, int width) 280 { 281 int flatIndex = isa.flattenFloatIndex(reg_idx); 282 regs.setFloatRegBits(flatIndex, val, width); 283 } 284 285 void setFloatRegBits(int reg_idx, FloatRegBits val) 286 { 287 int flatIndex = isa.flattenFloatIndex(reg_idx); 288 regs.setFloatRegBits(flatIndex, val); 289 } 290 291 uint64_t readPC() 292 { 293 return regs.readPC(); 294 } 295 296 void setPC(uint64_t val) 297 { 298 regs.setPC(val); 299 } 300 301 uint64_t readMicroPC() 302 { 303 return microPC; 304 } 305 306 void setMicroPC(uint64_t val) 307 { 308 microPC = val; 309 } 310 311 uint64_t readNextPC() 312 { 313 return regs.readNextPC(); 314 } 315 316 void setNextPC(uint64_t val) 317 { 318 regs.setNextPC(val); 319 } 320 321 uint64_t readNextMicroPC() 322 { 323 return nextMicroPC; 324 } 325 326 void setNextMicroPC(uint64_t val) 327 { 328 nextMicroPC = val; 329 } 330 331 uint64_t readNextNPC() 332 { 333 return regs.readNextNPC(); 334 } 335 336 void setNextNPC(uint64_t val) 337 { 338 regs.setNextNPC(val); 339 } 340 341 MiscReg 342 readMiscRegNoEffect(int misc_reg, ThreadID tid = 0) 343 { 344 return isa.readMiscRegNoEffect(misc_reg); 345 } 346 347 MiscReg 348 readMiscReg(int misc_reg, ThreadID tid = 0) 349 { 350 return isa.readMiscReg(misc_reg, tc); 351 } 352 353 void 354 setMiscRegNoEffect(int misc_reg, const MiscReg &val, ThreadID tid = 0) 355 { 356 return isa.setMiscRegNoEffect(misc_reg, val); 357 } 358 359 void 360 setMiscReg(int misc_reg, const MiscReg &val, ThreadID tid = 0) 361 { 362 return isa.setMiscReg(misc_reg, val, tc); 363 } 364 365 int 366 flattenIntIndex(int reg) 367 { 368 return isa.flattenIntIndex(reg); 369 } 370 371 int 372 flattenFloatIndex(int reg) 373 { 374 return isa.flattenFloatIndex(reg); 375 } 376 377 unsigned readStCondFailures() { return storeCondFailures; } 378 379 void setStCondFailures(unsigned sc_failures) 380 { storeCondFailures = sc_failures; } 381 382#if !FULL_SYSTEM 383 void syscall(int64_t callnum) 384 { 385 process->syscall(callnum, tc); 386 } 387#endif 388}; 389 390 391// for non-speculative execution context, spec_mode is always false 392inline bool 393SimpleThread::misspeculating() 394{ 395 return false; 396} 397 398#endif // __CPU_CPU_EXEC_CONTEXT_HH__ 399