1/*
2 * Copyright (c) 2004-2006 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: Kevin Lim
29 */
30
31#ifndef __CPU_BASE_DYN_INST_HH__
32#define __CPU_BASE_DYN_INST_HH__
33
34#include <bitset>
35#include <list>
36#include <string>
37
38#include "arch/faults.hh"
39#include "base/fast_alloc.hh"
40#include "base/trace.hh"
41#include "config/full_system.hh"
42#include "cpu/o3/comm.hh"
43#include "cpu/exetrace.hh"
44#include "cpu/inst_seq.hh"
45#include "cpu/op_class.hh"
46#include "cpu/static_inst.hh"
47#include "mem/packet.hh"
48#include "sim/system.hh"
49
50/**
51 * @file
52 * Defines a dynamic instruction context.
53 */
54
55// Forward declaration.
56class StaticInstPtr;
57
58template <class Impl>
59class BaseDynInst : public FastAlloc, public RefCounted
60{
61 public:
62 // Typedef for the CPU.
63 typedef typename Impl::CPUType ImplCPU;
64 typedef typename ImplCPU::ImplState ImplState;
65
66 // Logical register index type.
67 typedef TheISA::RegIndex RegIndex;
68 // Integer register type.
69 typedef TheISA::IntReg IntReg;
70 // Floating point register type.
71 typedef TheISA::FloatReg FloatReg;
72
73 // The DynInstPtr type.
74 typedef typename Impl::DynInstPtr DynInstPtr;
75
76 // The list of instructions iterator type.
77 typedef typename std::list<DynInstPtr>::iterator ListIt;
78
79 enum {
80 MaxInstSrcRegs = TheISA::MaxInstSrcRegs, /// Max source regs
81 MaxInstDestRegs = TheISA::MaxInstDestRegs, /// Max dest regs
82 };
83
84 /** The StaticInst used by this BaseDynInst. */
85 StaticInstPtr staticInst;
86
87 ////////////////////////////////////////////
88 //
89 // INSTRUCTION EXECUTION
90 //
91 ////////////////////////////////////////////
92 /** InstRecord that tracks this instructions. */
93 Trace::InstRecord *traceData;
94
95 /**
96 * Does a read to a given address.
97 * @param addr The address to read.
98 * @param data The read's data is written into this parameter.
99 * @param flags The request's flags.
100 * @return Returns any fault due to the read.
101 */
102 template <class T>
103 Fault read(Addr addr, T &data, unsigned flags);
104
105 /**
106 * Does a write to a given address.
107 * @param data The data to be written.
108 * @param addr The address to write to.
109 * @param flags The request's flags.
110 * @param res The result of the write (for load locked/store conditionals).
111 * @return Returns any fault due to the write.
112 */
113 template <class T>
114 Fault write(T data, Addr addr, unsigned flags,
115 uint64_t *res);
116
117 void prefetch(Addr addr, unsigned flags);
118 void writeHint(Addr addr, int size, unsigned flags);
119 Fault copySrcTranslate(Addr src);
120 Fault copy(Addr dest);
121
122 /** @todo: Consider making this private. */
123 public:
124 /** The sequence number of the instruction. */
125 InstSeqNum seqNum;
126
127 enum Status {
128 IqEntry, /// Instruction is in the IQ
129 RobEntry, /// Instruction is in the ROB
130 LsqEntry, /// Instruction is in the LSQ
131 Completed, /// Instruction has completed
132 ResultReady, /// Instruction has its result
133 CanIssue, /// Instruction can issue and execute
134 Issued, /// Instruction has issued
135 Executed, /// Instruction has executed
136 CanCommit, /// Instruction can commit
137 AtCommit, /// Instruction has reached commit
138 Committed, /// Instruction has committed
139 Squashed, /// Instruction is squashed
140 SquashedInIQ, /// Instruction is squashed in the IQ
141 SquashedInLSQ, /// Instruction is squashed in the LSQ
142 SquashedInROB, /// Instruction is squashed in the ROB
143 RecoverInst, /// Is a recover instruction
144 BlockingInst, /// Is a blocking instruction
145 ThreadsyncWait, /// Is a thread synchronization instruction
146 SerializeBefore, /// Needs to serialize on
147 /// instructions ahead of it
148 SerializeAfter, /// Needs to serialize instructions behind it
149 SerializeHandled, /// Serialization has been handled
150 NumStatus
151 };
152
153 /** The status of this BaseDynInst. Several bits can be set. */
154 std::bitset<NumStatus> status;
155
156 /** The thread this instruction is from. */
157 short threadNumber;
158
159 /** data address space ID, for loads & stores. */
160 short asid;
161
162 /** How many source registers are ready. */
163 unsigned readyRegs;
164
165 /** Pointer to the Impl's CPU object. */
166 ImplCPU *cpu;
167
168 /** Pointer to the thread state. */
169 ImplState *thread;
170
171 /** The kind of fault this instruction has generated. */
172 Fault fault;
173
174 /** The memory request. */
175 Request *req;
176
177 /** Pointer to the data for the memory access. */
178 uint8_t *memData;
179
180 /** The effective virtual address (lds & stores only). */
181 Addr effAddr;
182
183 /** The effective physical address. */
184 Addr physEffAddr;
185
186 /** Effective virtual address for a copy source. */
187 Addr copySrcEffAddr;
188
189 /** Effective physical address for a copy source. */
190 Addr copySrcPhysEffAddr;
191
192 /** The memory request flags (from translation). */
193 unsigned memReqFlags;
194
195 union Result {
196 uint64_t integer;
197// float fp;
198 double dbl;
199 };
200
201 /** The result of the instruction; assumes for now that there's only one
202 * destination register.
203 */
204 Result instResult;
205
206 /** Records changes to result? */
207 bool recordResult;
208
209 /** PC of this instruction. */
210 Addr PC;
211
212 /** Next non-speculative PC. It is not filled in at fetch, but rather
213 * once the target of the branch is truly known (either decode or
214 * execute).
215 */
216 Addr nextPC;
217
218 /** Next non-speculative NPC. Target PC for Mips or Sparc. */
219 Addr nextNPC;
220
221 /** Predicted next PC. */
222 Addr predPC;
223
224 /** Count of total number of dynamic instructions. */
225 static int instcount;
226
227#ifdef DEBUG
228 void dumpSNList();
229#endif
230
231 /** Whether or not the source register is ready.
232 * @todo: Not sure this should be here vs the derived class.
233 */
234 bool _readySrcRegIdx[MaxInstSrcRegs];
235
236 protected:
237 /** Flattened register index of the destination registers of this
238 * instruction.
239 */
240 TheISA::RegIndex _flatDestRegIdx[TheISA::MaxInstDestRegs];
241
242 /** Flattened register index of the source registers of this
243 * instruction.
244 */
245 TheISA::RegIndex _flatSrcRegIdx[TheISA::MaxInstSrcRegs];
246
247 /** Physical register index of the destination registers of this
248 * instruction.
249 */
250 PhysRegIndex _destRegIdx[TheISA::MaxInstDestRegs];
251
252 /** Physical register index of the source registers of this
253 * instruction.
254 */
255 PhysRegIndex _srcRegIdx[TheISA::MaxInstSrcRegs];
256
257 /** Physical register index of the previous producers of the
258 * architected destinations.
259 */
260 PhysRegIndex _prevDestRegIdx[TheISA::MaxInstDestRegs];
261
262 public:
263
264 /** Returns the physical register index of the i'th destination
265 * register.
266 */
267 PhysRegIndex renamedDestRegIdx(int idx) const
268 {
269 return _destRegIdx[idx];
270 }
271
272 /** Returns the physical register index of the i'th source register. */
273 PhysRegIndex renamedSrcRegIdx(int idx) const
274 {
275 return _srcRegIdx[idx];
276 }
277
278 /** Returns the flattened register index of the i'th destination
279 * register.
280 */
281 TheISA::RegIndex flattenedDestRegIdx(int idx) const
282 {
283 return _flatDestRegIdx[idx];
284 }
285
286 /** Returns the flattened register index of the i'th source register */
287 TheISA::RegIndex flattenedSrcRegIdx(int idx) const
288 {
289 return _flatSrcRegIdx[idx];
290 }
291
292 /** Returns the physical register index of the previous physical register
293 * that remapped to the same logical register index.
294 */
295 PhysRegIndex prevDestRegIdx(int idx) const
296 {
297 return _prevDestRegIdx[idx];
298 }
299
300 /** Renames a destination register to a physical register. Also records
301 * the previous physical register that the logical register mapped to.
302 */
303 void renameDestReg(int idx,
304 PhysRegIndex renamed_dest,
305 PhysRegIndex previous_rename)
306 {
307 _destRegIdx[idx] = renamed_dest;
308 _prevDestRegIdx[idx] = previous_rename;
309 }
310
311 /** Renames a source logical register to the physical register which
312 * has/will produce that logical register's result.
313 * @todo: add in whether or not the source register is ready.
314 */
315 void renameSrcReg(int idx, PhysRegIndex renamed_src)
316 {
317 _srcRegIdx[idx] = renamed_src;
318 }
319
320 /** Flattens a source architectural register index into a logical index.
321 */
322 void flattenSrcReg(int idx, TheISA::RegIndex flattened_src)
323 {
324 _flatSrcRegIdx[idx] = flattened_src;
325 }
326
327 /** Flattens a destination architectural register index into a logical
328 * index.
329 */
330 void flattenDestReg(int idx, TheISA::RegIndex flattened_dest)
331 {
332 _flatDestRegIdx[idx] = flattened_dest;
333 }
334
335 /** BaseDynInst constructor given a binary instruction.
336 * @param inst The binary instruction.
337 * @param PC The PC of the instruction.
338 * @param pred_PC The predicted next PC.
339 * @param seq_num The sequence number of the instruction.
340 * @param cpu Pointer to the instruction's CPU.
341 */
342 BaseDynInst(TheISA::ExtMachInst inst, Addr PC, Addr pred_PC,
343 InstSeqNum seq_num, ImplCPU *cpu);
344
345 /** BaseDynInst constructor given a StaticInst pointer.
346 * @param _staticInst The StaticInst for this BaseDynInst.
347 */
348 BaseDynInst(StaticInstPtr &_staticInst);
349
350 /** BaseDynInst destructor. */
351 ~BaseDynInst();
352
353 private:
354 /** Function to initialize variables in the constructors. */
355 void initVars();
356
357 public:
358 /** Dumps out contents of this BaseDynInst. */
359 void dump();
360
361 /** Dumps out contents of this BaseDynInst into given string. */
362 void dump(std::string &outstring);
363
364 /** Read this CPU's ID. */
365 int readCpuId() { return cpu->readCpuId(); }
366
367 /** Returns the fault type. */
368 Fault getFault() { return fault; }
369
370 /** Checks whether or not this instruction has had its branch target
371 * calculated yet. For now it is not utilized and is hacked to be
372 * always false.
373 * @todo: Actually use this instruction.
374 */
375 bool doneTargCalc() { return false; }
376
377 /** Returns the next PC. This could be the speculative next PC if it is
378 * called prior to the actual branch target being calculated.
379 */
380 Addr readNextPC() { return nextPC; }
381
382 /** Returns the next NPC. This could be the speculative next NPC if it is
383 * called prior to the actual branch target being calculated.
384 */
385 Addr readNextNPC() { return nextNPC; }
386
387 /** Set the predicted target of this current instruction. */
388 void setPredTarg(Addr predicted_PC) { predPC = predicted_PC; }
389
390 /** Returns the predicted target of the branch. */
391 Addr readPredTarg() { return predPC; }
392
393 /** Returns whether the instruction was predicted taken or not. */
394 bool predTaken()
395#if ISA_HAS_DELAY_SLOT
396 { return predPC != (nextPC + sizeof(TheISA::MachInst)); }
397#else
398 { return predPC != (PC + sizeof(TheISA::MachInst)); }
399#endif
400
401 /** Returns whether the instruction mispredicted. */
402 bool mispredicted()
403#if ISA_HAS_DELAY_SLOT
404 { return predPC != nextNPC; }
405#else
406 { return predPC != nextPC; }
407#endif
408 //
409 // Instruction types. Forward checks to StaticInst object.
410 //
411 bool isNop() const { return staticInst->isNop(); }
412 bool isMemRef() const { return staticInst->isMemRef(); }
413 bool isLoad() const { return staticInst->isLoad(); }
414 bool isStore() const { return staticInst->isStore(); }
415 bool isStoreConditional() const
416 { return staticInst->isStoreConditional(); }
417 bool isInstPrefetch() const { return staticInst->isInstPrefetch(); }
418 bool isDataPrefetch() const { return staticInst->isDataPrefetch(); }
419 bool isCopy() const { return staticInst->isCopy(); }
420 bool isInteger() const { return staticInst->isInteger(); }
421 bool isFloating() const { return staticInst->isFloating(); }
422 bool isControl() const { return staticInst->isControl(); }
423 bool isCall() const { return staticInst->isCall(); }
424 bool isReturn() const { return staticInst->isReturn(); }
425 bool isDirectCtrl() const { return staticInst->isDirectCtrl(); }
426 bool isIndirectCtrl() const { return staticInst->isIndirectCtrl(); }
427 bool isCondCtrl() const { return staticInst->isCondCtrl(); }
428 bool isUncondCtrl() const { return staticInst->isUncondCtrl(); }
429 bool isCondDelaySlot() const { return staticInst->isCondDelaySlot(); }
430 bool isThreadSync() const { return staticInst->isThreadSync(); }
431 bool isSerializing() const { return staticInst->isSerializing(); }
432 bool isSerializeBefore() const
433 { return staticInst->isSerializeBefore() || status[SerializeBefore]; }
434 bool isSerializeAfter() const
435 { return staticInst->isSerializeAfter() || status[SerializeAfter]; }
436 bool isMemBarrier() const { return staticInst->isMemBarrier(); }
437 bool isWriteBarrier() const { return staticInst->isWriteBarrier(); }
438 bool isNonSpeculative() const { return staticInst->isNonSpeculative(); }
439 bool isQuiesce() const { return staticInst->isQuiesce(); }
440 bool isIprAccess() const { return staticInst->isIprAccess(); }
441 bool isUnverifiable() const { return staticInst->isUnverifiable(); }
442
443 /** Temporarily sets this instruction as a serialize before instruction. */
444 void setSerializeBefore() { status.set(SerializeBefore); }
445
446 /** Clears the serializeBefore part of this instruction. */
447 void clearSerializeBefore() { status.reset(SerializeBefore); }
448
449 /** Checks if this serializeBefore is only temporarily set. */
450 bool isTempSerializeBefore() { return status[SerializeBefore]; }
451
452 /** Temporarily sets this instruction as a serialize after instruction. */
453 void setSerializeAfter() { status.set(SerializeAfter); }
454
455 /** Clears the serializeAfter part of this instruction.*/
456 void clearSerializeAfter() { status.reset(SerializeAfter); }
457
458 /** Checks if this serializeAfter is only temporarily set. */
459 bool isTempSerializeAfter() { return status[SerializeAfter]; }
460
461 /** Sets the serialization part of this instruction as handled. */
462 void setSerializeHandled() { status.set(SerializeHandled); }
463
464 /** Checks if the serialization part of this instruction has been
465 * handled. This does not apply to the temporary serializing
466 * state; it only applies to this instruction's own permanent
467 * serializing state.
468 */
469 bool isSerializeHandled() { return status[SerializeHandled]; }
470
471 /** Returns the opclass of this instruction. */
472 OpClass opClass() const { return staticInst->opClass(); }
473
474 /** Returns the branch target address. */
475 Addr branchTarget() const { return staticInst->branchTarget(PC); }
476
477 /** Returns the number of source registers. */
478 int8_t numSrcRegs() const { return staticInst->numSrcRegs(); }
479
480 /** Returns the number of destination registers. */
481 int8_t numDestRegs() const { return staticInst->numDestRegs(); }
482
483 // the following are used to track physical register usage
484 // for machines with separate int & FP reg files
485 int8_t numFPDestRegs() const { return staticInst->numFPDestRegs(); }
486 int8_t numIntDestRegs() const { return staticInst->numIntDestRegs(); }
487
488 /** Returns the logical register index of the i'th destination register. */
489 RegIndex destRegIdx(int i) const { return staticInst->destRegIdx(i); }
490
491 /** Returns the logical register index of the i'th source register. */
492 RegIndex srcRegIdx(int i) const { return staticInst->srcRegIdx(i); }
493
494 /** Returns the result of an integer instruction. */
495 uint64_t readIntResult() { return instResult.integer; }
496
497 /** Returns the result of a floating point instruction. */
498 float readFloatResult() { return (float)instResult.dbl; }
499
500 /** Returns the result of a floating point (double) instruction. */
501 double readDoubleResult() { return instResult.dbl; }
502
503 /** Records an integer register being set to a value. */
| 1/*
2 * Copyright (c) 2004-2006 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: Kevin Lim
29 */
30
31#ifndef __CPU_BASE_DYN_INST_HH__
32#define __CPU_BASE_DYN_INST_HH__
33
34#include <bitset>
35#include <list>
36#include <string>
37
38#include "arch/faults.hh"
39#include "base/fast_alloc.hh"
40#include "base/trace.hh"
41#include "config/full_system.hh"
42#include "cpu/o3/comm.hh"
43#include "cpu/exetrace.hh"
44#include "cpu/inst_seq.hh"
45#include "cpu/op_class.hh"
46#include "cpu/static_inst.hh"
47#include "mem/packet.hh"
48#include "sim/system.hh"
49
50/**
51 * @file
52 * Defines a dynamic instruction context.
53 */
54
55// Forward declaration.
56class StaticInstPtr;
57
58template <class Impl>
59class BaseDynInst : public FastAlloc, public RefCounted
60{
61 public:
62 // Typedef for the CPU.
63 typedef typename Impl::CPUType ImplCPU;
64 typedef typename ImplCPU::ImplState ImplState;
65
66 // Logical register index type.
67 typedef TheISA::RegIndex RegIndex;
68 // Integer register type.
69 typedef TheISA::IntReg IntReg;
70 // Floating point register type.
71 typedef TheISA::FloatReg FloatReg;
72
73 // The DynInstPtr type.
74 typedef typename Impl::DynInstPtr DynInstPtr;
75
76 // The list of instructions iterator type.
77 typedef typename std::list<DynInstPtr>::iterator ListIt;
78
79 enum {
80 MaxInstSrcRegs = TheISA::MaxInstSrcRegs, /// Max source regs
81 MaxInstDestRegs = TheISA::MaxInstDestRegs, /// Max dest regs
82 };
83
84 /** The StaticInst used by this BaseDynInst. */
85 StaticInstPtr staticInst;
86
87 ////////////////////////////////////////////
88 //
89 // INSTRUCTION EXECUTION
90 //
91 ////////////////////////////////////////////
92 /** InstRecord that tracks this instructions. */
93 Trace::InstRecord *traceData;
94
95 /**
96 * Does a read to a given address.
97 * @param addr The address to read.
98 * @param data The read's data is written into this parameter.
99 * @param flags The request's flags.
100 * @return Returns any fault due to the read.
101 */
102 template <class T>
103 Fault read(Addr addr, T &data, unsigned flags);
104
105 /**
106 * Does a write to a given address.
107 * @param data The data to be written.
108 * @param addr The address to write to.
109 * @param flags The request's flags.
110 * @param res The result of the write (for load locked/store conditionals).
111 * @return Returns any fault due to the write.
112 */
113 template <class T>
114 Fault write(T data, Addr addr, unsigned flags,
115 uint64_t *res);
116
117 void prefetch(Addr addr, unsigned flags);
118 void writeHint(Addr addr, int size, unsigned flags);
119 Fault copySrcTranslate(Addr src);
120 Fault copy(Addr dest);
121
122 /** @todo: Consider making this private. */
123 public:
124 /** The sequence number of the instruction. */
125 InstSeqNum seqNum;
126
127 enum Status {
128 IqEntry, /// Instruction is in the IQ
129 RobEntry, /// Instruction is in the ROB
130 LsqEntry, /// Instruction is in the LSQ
131 Completed, /// Instruction has completed
132 ResultReady, /// Instruction has its result
133 CanIssue, /// Instruction can issue and execute
134 Issued, /// Instruction has issued
135 Executed, /// Instruction has executed
136 CanCommit, /// Instruction can commit
137 AtCommit, /// Instruction has reached commit
138 Committed, /// Instruction has committed
139 Squashed, /// Instruction is squashed
140 SquashedInIQ, /// Instruction is squashed in the IQ
141 SquashedInLSQ, /// Instruction is squashed in the LSQ
142 SquashedInROB, /// Instruction is squashed in the ROB
143 RecoverInst, /// Is a recover instruction
144 BlockingInst, /// Is a blocking instruction
145 ThreadsyncWait, /// Is a thread synchronization instruction
146 SerializeBefore, /// Needs to serialize on
147 /// instructions ahead of it
148 SerializeAfter, /// Needs to serialize instructions behind it
149 SerializeHandled, /// Serialization has been handled
150 NumStatus
151 };
152
153 /** The status of this BaseDynInst. Several bits can be set. */
154 std::bitset<NumStatus> status;
155
156 /** The thread this instruction is from. */
157 short threadNumber;
158
159 /** data address space ID, for loads & stores. */
160 short asid;
161
162 /** How many source registers are ready. */
163 unsigned readyRegs;
164
165 /** Pointer to the Impl's CPU object. */
166 ImplCPU *cpu;
167
168 /** Pointer to the thread state. */
169 ImplState *thread;
170
171 /** The kind of fault this instruction has generated. */
172 Fault fault;
173
174 /** The memory request. */
175 Request *req;
176
177 /** Pointer to the data for the memory access. */
178 uint8_t *memData;
179
180 /** The effective virtual address (lds & stores only). */
181 Addr effAddr;
182
183 /** The effective physical address. */
184 Addr physEffAddr;
185
186 /** Effective virtual address for a copy source. */
187 Addr copySrcEffAddr;
188
189 /** Effective physical address for a copy source. */
190 Addr copySrcPhysEffAddr;
191
192 /** The memory request flags (from translation). */
193 unsigned memReqFlags;
194
195 union Result {
196 uint64_t integer;
197// float fp;
198 double dbl;
199 };
200
201 /** The result of the instruction; assumes for now that there's only one
202 * destination register.
203 */
204 Result instResult;
205
206 /** Records changes to result? */
207 bool recordResult;
208
209 /** PC of this instruction. */
210 Addr PC;
211
212 /** Next non-speculative PC. It is not filled in at fetch, but rather
213 * once the target of the branch is truly known (either decode or
214 * execute).
215 */
216 Addr nextPC;
217
218 /** Next non-speculative NPC. Target PC for Mips or Sparc. */
219 Addr nextNPC;
220
221 /** Predicted next PC. */
222 Addr predPC;
223
224 /** Count of total number of dynamic instructions. */
225 static int instcount;
226
227#ifdef DEBUG
228 void dumpSNList();
229#endif
230
231 /** Whether or not the source register is ready.
232 * @todo: Not sure this should be here vs the derived class.
233 */
234 bool _readySrcRegIdx[MaxInstSrcRegs];
235
236 protected:
237 /** Flattened register index of the destination registers of this
238 * instruction.
239 */
240 TheISA::RegIndex _flatDestRegIdx[TheISA::MaxInstDestRegs];
241
242 /** Flattened register index of the source registers of this
243 * instruction.
244 */
245 TheISA::RegIndex _flatSrcRegIdx[TheISA::MaxInstSrcRegs];
246
247 /** Physical register index of the destination registers of this
248 * instruction.
249 */
250 PhysRegIndex _destRegIdx[TheISA::MaxInstDestRegs];
251
252 /** Physical register index of the source registers of this
253 * instruction.
254 */
255 PhysRegIndex _srcRegIdx[TheISA::MaxInstSrcRegs];
256
257 /** Physical register index of the previous producers of the
258 * architected destinations.
259 */
260 PhysRegIndex _prevDestRegIdx[TheISA::MaxInstDestRegs];
261
262 public:
263
264 /** Returns the physical register index of the i'th destination
265 * register.
266 */
267 PhysRegIndex renamedDestRegIdx(int idx) const
268 {
269 return _destRegIdx[idx];
270 }
271
272 /** Returns the physical register index of the i'th source register. */
273 PhysRegIndex renamedSrcRegIdx(int idx) const
274 {
275 return _srcRegIdx[idx];
276 }
277
278 /** Returns the flattened register index of the i'th destination
279 * register.
280 */
281 TheISA::RegIndex flattenedDestRegIdx(int idx) const
282 {
283 return _flatDestRegIdx[idx];
284 }
285
286 /** Returns the flattened register index of the i'th source register */
287 TheISA::RegIndex flattenedSrcRegIdx(int idx) const
288 {
289 return _flatSrcRegIdx[idx];
290 }
291
292 /** Returns the physical register index of the previous physical register
293 * that remapped to the same logical register index.
294 */
295 PhysRegIndex prevDestRegIdx(int idx) const
296 {
297 return _prevDestRegIdx[idx];
298 }
299
300 /** Renames a destination register to a physical register. Also records
301 * the previous physical register that the logical register mapped to.
302 */
303 void renameDestReg(int idx,
304 PhysRegIndex renamed_dest,
305 PhysRegIndex previous_rename)
306 {
307 _destRegIdx[idx] = renamed_dest;
308 _prevDestRegIdx[idx] = previous_rename;
309 }
310
311 /** Renames a source logical register to the physical register which
312 * has/will produce that logical register's result.
313 * @todo: add in whether or not the source register is ready.
314 */
315 void renameSrcReg(int idx, PhysRegIndex renamed_src)
316 {
317 _srcRegIdx[idx] = renamed_src;
318 }
319
320 /** Flattens a source architectural register index into a logical index.
321 */
322 void flattenSrcReg(int idx, TheISA::RegIndex flattened_src)
323 {
324 _flatSrcRegIdx[idx] = flattened_src;
325 }
326
327 /** Flattens a destination architectural register index into a logical
328 * index.
329 */
330 void flattenDestReg(int idx, TheISA::RegIndex flattened_dest)
331 {
332 _flatDestRegIdx[idx] = flattened_dest;
333 }
334
335 /** BaseDynInst constructor given a binary instruction.
336 * @param inst The binary instruction.
337 * @param PC The PC of the instruction.
338 * @param pred_PC The predicted next PC.
339 * @param seq_num The sequence number of the instruction.
340 * @param cpu Pointer to the instruction's CPU.
341 */
342 BaseDynInst(TheISA::ExtMachInst inst, Addr PC, Addr pred_PC,
343 InstSeqNum seq_num, ImplCPU *cpu);
344
345 /** BaseDynInst constructor given a StaticInst pointer.
346 * @param _staticInst The StaticInst for this BaseDynInst.
347 */
348 BaseDynInst(StaticInstPtr &_staticInst);
349
350 /** BaseDynInst destructor. */
351 ~BaseDynInst();
352
353 private:
354 /** Function to initialize variables in the constructors. */
355 void initVars();
356
357 public:
358 /** Dumps out contents of this BaseDynInst. */
359 void dump();
360
361 /** Dumps out contents of this BaseDynInst into given string. */
362 void dump(std::string &outstring);
363
364 /** Read this CPU's ID. */
365 int readCpuId() { return cpu->readCpuId(); }
366
367 /** Returns the fault type. */
368 Fault getFault() { return fault; }
369
370 /** Checks whether or not this instruction has had its branch target
371 * calculated yet. For now it is not utilized and is hacked to be
372 * always false.
373 * @todo: Actually use this instruction.
374 */
375 bool doneTargCalc() { return false; }
376
377 /** Returns the next PC. This could be the speculative next PC if it is
378 * called prior to the actual branch target being calculated.
379 */
380 Addr readNextPC() { return nextPC; }
381
382 /** Returns the next NPC. This could be the speculative next NPC if it is
383 * called prior to the actual branch target being calculated.
384 */
385 Addr readNextNPC() { return nextNPC; }
386
387 /** Set the predicted target of this current instruction. */
388 void setPredTarg(Addr predicted_PC) { predPC = predicted_PC; }
389
390 /** Returns the predicted target of the branch. */
391 Addr readPredTarg() { return predPC; }
392
393 /** Returns whether the instruction was predicted taken or not. */
394 bool predTaken()
395#if ISA_HAS_DELAY_SLOT
396 { return predPC != (nextPC + sizeof(TheISA::MachInst)); }
397#else
398 { return predPC != (PC + sizeof(TheISA::MachInst)); }
399#endif
400
401 /** Returns whether the instruction mispredicted. */
402 bool mispredicted()
403#if ISA_HAS_DELAY_SLOT
404 { return predPC != nextNPC; }
405#else
406 { return predPC != nextPC; }
407#endif
408 //
409 // Instruction types. Forward checks to StaticInst object.
410 //
411 bool isNop() const { return staticInst->isNop(); }
412 bool isMemRef() const { return staticInst->isMemRef(); }
413 bool isLoad() const { return staticInst->isLoad(); }
414 bool isStore() const { return staticInst->isStore(); }
415 bool isStoreConditional() const
416 { return staticInst->isStoreConditional(); }
417 bool isInstPrefetch() const { return staticInst->isInstPrefetch(); }
418 bool isDataPrefetch() const { return staticInst->isDataPrefetch(); }
419 bool isCopy() const { return staticInst->isCopy(); }
420 bool isInteger() const { return staticInst->isInteger(); }
421 bool isFloating() const { return staticInst->isFloating(); }
422 bool isControl() const { return staticInst->isControl(); }
423 bool isCall() const { return staticInst->isCall(); }
424 bool isReturn() const { return staticInst->isReturn(); }
425 bool isDirectCtrl() const { return staticInst->isDirectCtrl(); }
426 bool isIndirectCtrl() const { return staticInst->isIndirectCtrl(); }
427 bool isCondCtrl() const { return staticInst->isCondCtrl(); }
428 bool isUncondCtrl() const { return staticInst->isUncondCtrl(); }
429 bool isCondDelaySlot() const { return staticInst->isCondDelaySlot(); }
430 bool isThreadSync() const { return staticInst->isThreadSync(); }
431 bool isSerializing() const { return staticInst->isSerializing(); }
432 bool isSerializeBefore() const
433 { return staticInst->isSerializeBefore() || status[SerializeBefore]; }
434 bool isSerializeAfter() const
435 { return staticInst->isSerializeAfter() || status[SerializeAfter]; }
436 bool isMemBarrier() const { return staticInst->isMemBarrier(); }
437 bool isWriteBarrier() const { return staticInst->isWriteBarrier(); }
438 bool isNonSpeculative() const { return staticInst->isNonSpeculative(); }
439 bool isQuiesce() const { return staticInst->isQuiesce(); }
440 bool isIprAccess() const { return staticInst->isIprAccess(); }
441 bool isUnverifiable() const { return staticInst->isUnverifiable(); }
442
443 /** Temporarily sets this instruction as a serialize before instruction. */
444 void setSerializeBefore() { status.set(SerializeBefore); }
445
446 /** Clears the serializeBefore part of this instruction. */
447 void clearSerializeBefore() { status.reset(SerializeBefore); }
448
449 /** Checks if this serializeBefore is only temporarily set. */
450 bool isTempSerializeBefore() { return status[SerializeBefore]; }
451
452 /** Temporarily sets this instruction as a serialize after instruction. */
453 void setSerializeAfter() { status.set(SerializeAfter); }
454
455 /** Clears the serializeAfter part of this instruction.*/
456 void clearSerializeAfter() { status.reset(SerializeAfter); }
457
458 /** Checks if this serializeAfter is only temporarily set. */
459 bool isTempSerializeAfter() { return status[SerializeAfter]; }
460
461 /** Sets the serialization part of this instruction as handled. */
462 void setSerializeHandled() { status.set(SerializeHandled); }
463
464 /** Checks if the serialization part of this instruction has been
465 * handled. This does not apply to the temporary serializing
466 * state; it only applies to this instruction's own permanent
467 * serializing state.
468 */
469 bool isSerializeHandled() { return status[SerializeHandled]; }
470
471 /** Returns the opclass of this instruction. */
472 OpClass opClass() const { return staticInst->opClass(); }
473
474 /** Returns the branch target address. */
475 Addr branchTarget() const { return staticInst->branchTarget(PC); }
476
477 /** Returns the number of source registers. */
478 int8_t numSrcRegs() const { return staticInst->numSrcRegs(); }
479
480 /** Returns the number of destination registers. */
481 int8_t numDestRegs() const { return staticInst->numDestRegs(); }
482
483 // the following are used to track physical register usage
484 // for machines with separate int & FP reg files
485 int8_t numFPDestRegs() const { return staticInst->numFPDestRegs(); }
486 int8_t numIntDestRegs() const { return staticInst->numIntDestRegs(); }
487
488 /** Returns the logical register index of the i'th destination register. */
489 RegIndex destRegIdx(int i) const { return staticInst->destRegIdx(i); }
490
491 /** Returns the logical register index of the i'th source register. */
492 RegIndex srcRegIdx(int i) const { return staticInst->srcRegIdx(i); }
493
494 /** Returns the result of an integer instruction. */
495 uint64_t readIntResult() { return instResult.integer; }
496
497 /** Returns the result of a floating point instruction. */
498 float readFloatResult() { return (float)instResult.dbl; }
499
500 /** Returns the result of a floating point (double) instruction. */
501 double readDoubleResult() { return instResult.dbl; }
502
503 /** Records an integer register being set to a value. */
|
504 void setIntReg(const StaticInst *si, int idx, uint64_t val)
| 504 void setIntRegOperand(const StaticInst *si, int idx, uint64_t val)
|
505 {
506 if (recordResult)
507 instResult.integer = val;
508 }
509
510 /** Records an fp register being set to a value. */
| 505 {
506 if (recordResult)
507 instResult.integer = val;
508 }
509
510 /** Records an fp register being set to a value. */
|
511 void setFloatReg(const StaticInst *si, int idx, FloatReg val, int width)
| 511 void setFloatRegOperand(const StaticInst *si, int idx, FloatReg val,
512 int width)
|
512 {
513 if (recordResult) {
514 if (width == 32)
515 instResult.dbl = (double)val;
516 else if (width == 64)
517 instResult.dbl = val;
518 else
519 panic("Unsupported width!");
520 }
521 }
522
523 /** Records an fp register being set to a value. */
| 513 {
514 if (recordResult) {
515 if (width == 32)
516 instResult.dbl = (double)val;
517 else if (width == 64)
518 instResult.dbl = val;
519 else
520 panic("Unsupported width!");
521 }
522 }
523
524 /** Records an fp register being set to a value. */
|
524 void setFloatReg(const StaticInst *si, int idx, FloatReg val)
| 525 void setFloatRegOperand(const StaticInst *si, int idx, FloatReg val)
|
525 {
526 if (recordResult)
527 instResult.dbl = (double)val;
528 }
529
530 /** Records an fp register being set to an integer value. */
| 526 {
527 if (recordResult)
528 instResult.dbl = (double)val;
529 }
530
531 /** Records an fp register being set to an integer value. */
|
531 void setFloatRegBits(const StaticInst *si, int idx, uint64_t val, int width)
| 532 void setFloatRegOperandBits(const StaticInst *si, int idx, uint64_t val,
533 int width)
|
532 {
533 if (recordResult)
534 instResult.integer = val;
535 }
536
537 /** Records an fp register being set to an integer value. */
| 534 {
535 if (recordResult)
536 instResult.integer = val;
537 }
538
539 /** Records an fp register being set to an integer value. */
|
538 void setFloatRegBits(const StaticInst *si, int idx, uint64_t val)
| 540 void setFloatRegOperandBits(const StaticInst *si, int idx, uint64_t val)
|
539 {
540 if (recordResult)
541 instResult.integer = val;
542 }
543
544 /** Records that one of the source registers is ready. */
545 void markSrcRegReady();
546
547 /** Marks a specific register as ready. */
548 void markSrcRegReady(RegIndex src_idx);
549
550 /** Returns if a source register is ready. */
551 bool isReadySrcRegIdx(int idx) const
552 {
553 return this->_readySrcRegIdx[idx];
554 }
555
556 /** Sets this instruction as completed. */
557 void setCompleted() { status.set(Completed); }
558
559 /** Returns whether or not this instruction is completed. */
560 bool isCompleted() const { return status[Completed]; }
561
562 /** Marks the result as ready. */
563 void setResultReady() { status.set(ResultReady); }
564
565 /** Returns whether or not the result is ready. */
566 bool isResultReady() const { return status[ResultReady]; }
567
568 /** Sets this instruction as ready to issue. */
569 void setCanIssue() { status.set(CanIssue); }
570
571 /** Returns whether or not this instruction is ready to issue. */
572 bool readyToIssue() const { return status[CanIssue]; }
573
574 /** Sets this instruction as issued from the IQ. */
575 void setIssued() { status.set(Issued); }
576
577 /** Returns whether or not this instruction has issued. */
578 bool isIssued() const { return status[Issued]; }
579
580 /** Sets this instruction as executed. */
581 void setExecuted() { status.set(Executed); }
582
583 /** Returns whether or not this instruction has executed. */
584 bool isExecuted() const { return status[Executed]; }
585
586 /** Sets this instruction as ready to commit. */
587 void setCanCommit() { status.set(CanCommit); }
588
589 /** Clears this instruction as being ready to commit. */
590 void clearCanCommit() { status.reset(CanCommit); }
591
592 /** Returns whether or not this instruction is ready to commit. */
593 bool readyToCommit() const { return status[CanCommit]; }
594
595 void setAtCommit() { status.set(AtCommit); }
596
597 bool isAtCommit() { return status[AtCommit]; }
598
599 /** Sets this instruction as committed. */
600 void setCommitted() { status.set(Committed); }
601
602 /** Returns whether or not this instruction is committed. */
603 bool isCommitted() const { return status[Committed]; }
604
605 /** Sets this instruction as squashed. */
606 void setSquashed() { status.set(Squashed); }
607
608 /** Returns whether or not this instruction is squashed. */
609 bool isSquashed() const { return status[Squashed]; }
610
611 //Instruction Queue Entry
612 //-----------------------
613 /** Sets this instruction as a entry the IQ. */
614 void setInIQ() { status.set(IqEntry); }
615
616 /** Sets this instruction as a entry the IQ. */
617 void clearInIQ() { status.reset(IqEntry); }
618
619 /** Returns whether or not this instruction has issued. */
620 bool isInIQ() const { return status[IqEntry]; }
621
622 /** Sets this instruction as squashed in the IQ. */
623 void setSquashedInIQ() { status.set(SquashedInIQ); status.set(Squashed);}
624
625 /** Returns whether or not this instruction is squashed in the IQ. */
626 bool isSquashedInIQ() const { return status[SquashedInIQ]; }
627
628
629 //Load / Store Queue Functions
630 //-----------------------
631 /** Sets this instruction as a entry the LSQ. */
632 void setInLSQ() { status.set(LsqEntry); }
633
634 /** Sets this instruction as a entry the LSQ. */
635 void removeInLSQ() { status.reset(LsqEntry); }
636
637 /** Returns whether or not this instruction is in the LSQ. */
638 bool isInLSQ() const { return status[LsqEntry]; }
639
640 /** Sets this instruction as squashed in the LSQ. */
641 void setSquashedInLSQ() { status.set(SquashedInLSQ);}
642
643 /** Returns whether or not this instruction is squashed in the LSQ. */
644 bool isSquashedInLSQ() const { return status[SquashedInLSQ]; }
645
646
647 //Reorder Buffer Functions
648 //-----------------------
649 /** Sets this instruction as a entry the ROB. */
650 void setInROB() { status.set(RobEntry); }
651
652 /** Sets this instruction as a entry the ROB. */
653 void clearInROB() { status.reset(RobEntry); }
654
655 /** Returns whether or not this instruction is in the ROB. */
656 bool isInROB() const { return status[RobEntry]; }
657
658 /** Sets this instruction as squashed in the ROB. */
659 void setSquashedInROB() { status.set(SquashedInROB); }
660
661 /** Returns whether or not this instruction is squashed in the ROB. */
662 bool isSquashedInROB() const { return status[SquashedInROB]; }
663
664 /** Read the PC of this instruction. */
665 const Addr readPC() const { return PC; }
666
667 /** Set the next PC of this instruction (its actual target). */
668 void setNextPC(uint64_t val)
669 {
670 nextPC = val;
671 }
672
673 /** Set the next NPC of this instruction (the target in Mips or Sparc).*/
674 void setNextNPC(uint64_t val)
675 {
676 nextNPC = val;
677 }
678
679 /** Sets the ASID. */
680 void setASID(short addr_space_id) { asid = addr_space_id; }
681
682 /** Sets the thread id. */
683 void setTid(unsigned tid) { threadNumber = tid; }
684
685 /** Sets the pointer to the thread state. */
686 void setThreadState(ImplState *state) { thread = state; }
687
688 /** Returns the thread context. */
689 ThreadContext *tcBase() { return thread->getTC(); }
690
691 private:
692 /** Instruction effective address.
693 * @todo: Consider if this is necessary or not.
694 */
695 Addr instEffAddr;
696
697 /** Whether or not the effective address calculation is completed.
698 * @todo: Consider if this is necessary or not.
699 */
700 bool eaCalcDone;
701
702 public:
703 /** Sets the effective address. */
704 void setEA(Addr &ea) { instEffAddr = ea; eaCalcDone = true; }
705
706 /** Returns the effective address. */
707 const Addr &getEA() const { return instEffAddr; }
708
709 /** Returns whether or not the eff. addr. calculation has been completed. */
710 bool doneEACalc() { return eaCalcDone; }
711
712 /** Returns whether or not the eff. addr. source registers are ready. */
713 bool eaSrcsReady();
714
715 /** Whether or not the memory operation is done. */
716 bool memOpDone;
717
718 public:
719 /** Load queue index. */
720 int16_t lqIdx;
721
722 /** Store queue index. */
723 int16_t sqIdx;
724
725 /** Iterator pointing to this BaseDynInst in the list of all insts. */
726 ListIt instListIt;
727
728 /** Returns iterator to this instruction in the list of all insts. */
729 ListIt &getInstListIt() { return instListIt; }
730
731 /** Sets iterator for this instruction in the list of all insts. */
732 void setInstListIt(ListIt _instListIt) { instListIt = _instListIt; }
733
734 public:
735 /** Returns the number of consecutive store conditional failures. */
736 unsigned readStCondFailures()
737 { return thread->storeCondFailures; }
738
739 /** Sets the number of consecutive store conditional failures. */
740 void setStCondFailures(unsigned sc_failures)
741 { thread->storeCondFailures = sc_failures; }
742};
743
744template<class Impl>
745template<class T>
746inline Fault
747BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags)
748{
749 // Sometimes reads will get retried, so they may come through here
750 // twice.
751 if (!req) {
752 req = new Request();
753 req->setVirt(asid, addr, sizeof(T), flags, this->PC);
754 req->setThreadContext(thread->readCpuId(), threadNumber);
755 } else {
756 assert(addr == req->getVaddr());
757 }
758
759 if ((req->getVaddr() & (TheISA::VMPageSize - 1)) + req->getSize() >
760 TheISA::VMPageSize) {
761 return TheISA::genAlignmentFault();
762 }
763
764 fault = cpu->translateDataReadReq(req, thread);
765
766 if (fault == NoFault) {
767 effAddr = req->getVaddr();
768 physEffAddr = req->getPaddr();
769 memReqFlags = req->getFlags();
770
771#if 0
772 if (cpu->system->memctrl->badaddr(physEffAddr)) {
773 fault = TheISA::genMachineCheckFault();
774 data = (T)-1;
775 this->setExecuted();
776 } else {
777 fault = cpu->read(req, data, lqIdx);
778 }
779#else
780 fault = cpu->read(req, data, lqIdx);
781#endif
782 } else {
783 // Return a fixed value to keep simulation deterministic even
784 // along misspeculated paths.
785 data = (T)-1;
786
787 // Commit will have to clean up whatever happened. Set this
788 // instruction as executed.
789 this->setExecuted();
790 }
791
792 if (traceData) {
793 traceData->setAddr(addr);
794 traceData->setData(data);
795 }
796
797 return fault;
798}
799
800template<class Impl>
801template<class T>
802inline Fault
803BaseDynInst<Impl>::write(T data, Addr addr, unsigned flags, uint64_t *res)
804{
805 if (traceData) {
806 traceData->setAddr(addr);
807 traceData->setData(data);
808 }
809
810 assert(req == NULL);
811
812 req = new Request();
813 req->setVirt(asid, addr, sizeof(T), flags, this->PC);
814 req->setThreadContext(thread->readCpuId(), threadNumber);
815
816 if ((req->getVaddr() & (TheISA::VMPageSize - 1)) + req->getSize() >
817 TheISA::VMPageSize) {
818 return TheISA::genAlignmentFault();
819 }
820
821 fault = cpu->translateDataWriteReq(req, thread);
822
823 if (fault == NoFault) {
824 effAddr = req->getVaddr();
825 physEffAddr = req->getPaddr();
826 memReqFlags = req->getFlags();
827#if 0
828 if (cpu->system->memctrl->badaddr(physEffAddr)) {
829 fault = TheISA::genMachineCheckFault();
830 } else {
831 fault = cpu->write(req, data, sqIdx);
832 }
833#else
834 fault = cpu->write(req, data, sqIdx);
835#endif
836 }
837
838 if (res) {
839 // always return some result to keep misspeculated paths
840 // (which will ignore faults) deterministic
841 *res = (fault == NoFault) ? req->getScResult() : 0;
842 }
843
844 return fault;
845}
846
847#endif // __CPU_BASE_DYN_INST_HH__
| 541 {
542 if (recordResult)
543 instResult.integer = val;
544 }
545
546 /** Records that one of the source registers is ready. */
547 void markSrcRegReady();
548
549 /** Marks a specific register as ready. */
550 void markSrcRegReady(RegIndex src_idx);
551
552 /** Returns if a source register is ready. */
553 bool isReadySrcRegIdx(int idx) const
554 {
555 return this->_readySrcRegIdx[idx];
556 }
557
558 /** Sets this instruction as completed. */
559 void setCompleted() { status.set(Completed); }
560
561 /** Returns whether or not this instruction is completed. */
562 bool isCompleted() const { return status[Completed]; }
563
564 /** Marks the result as ready. */
565 void setResultReady() { status.set(ResultReady); }
566
567 /** Returns whether or not the result is ready. */
568 bool isResultReady() const { return status[ResultReady]; }
569
570 /** Sets this instruction as ready to issue. */
571 void setCanIssue() { status.set(CanIssue); }
572
573 /** Returns whether or not this instruction is ready to issue. */
574 bool readyToIssue() const { return status[CanIssue]; }
575
576 /** Sets this instruction as issued from the IQ. */
577 void setIssued() { status.set(Issued); }
578
579 /** Returns whether or not this instruction has issued. */
580 bool isIssued() const { return status[Issued]; }
581
582 /** Sets this instruction as executed. */
583 void setExecuted() { status.set(Executed); }
584
585 /** Returns whether or not this instruction has executed. */
586 bool isExecuted() const { return status[Executed]; }
587
588 /** Sets this instruction as ready to commit. */
589 void setCanCommit() { status.set(CanCommit); }
590
591 /** Clears this instruction as being ready to commit. */
592 void clearCanCommit() { status.reset(CanCommit); }
593
594 /** Returns whether or not this instruction is ready to commit. */
595 bool readyToCommit() const { return status[CanCommit]; }
596
597 void setAtCommit() { status.set(AtCommit); }
598
599 bool isAtCommit() { return status[AtCommit]; }
600
601 /** Sets this instruction as committed. */
602 void setCommitted() { status.set(Committed); }
603
604 /** Returns whether or not this instruction is committed. */
605 bool isCommitted() const { return status[Committed]; }
606
607 /** Sets this instruction as squashed. */
608 void setSquashed() { status.set(Squashed); }
609
610 /** Returns whether or not this instruction is squashed. */
611 bool isSquashed() const { return status[Squashed]; }
612
613 //Instruction Queue Entry
614 //-----------------------
615 /** Sets this instruction as a entry the IQ. */
616 void setInIQ() { status.set(IqEntry); }
617
618 /** Sets this instruction as a entry the IQ. */
619 void clearInIQ() { status.reset(IqEntry); }
620
621 /** Returns whether or not this instruction has issued. */
622 bool isInIQ() const { return status[IqEntry]; }
623
624 /** Sets this instruction as squashed in the IQ. */
625 void setSquashedInIQ() { status.set(SquashedInIQ); status.set(Squashed);}
626
627 /** Returns whether or not this instruction is squashed in the IQ. */
628 bool isSquashedInIQ() const { return status[SquashedInIQ]; }
629
630
631 //Load / Store Queue Functions
632 //-----------------------
633 /** Sets this instruction as a entry the LSQ. */
634 void setInLSQ() { status.set(LsqEntry); }
635
636 /** Sets this instruction as a entry the LSQ. */
637 void removeInLSQ() { status.reset(LsqEntry); }
638
639 /** Returns whether or not this instruction is in the LSQ. */
640 bool isInLSQ() const { return status[LsqEntry]; }
641
642 /** Sets this instruction as squashed in the LSQ. */
643 void setSquashedInLSQ() { status.set(SquashedInLSQ);}
644
645 /** Returns whether or not this instruction is squashed in the LSQ. */
646 bool isSquashedInLSQ() const { return status[SquashedInLSQ]; }
647
648
649 //Reorder Buffer Functions
650 //-----------------------
651 /** Sets this instruction as a entry the ROB. */
652 void setInROB() { status.set(RobEntry); }
653
654 /** Sets this instruction as a entry the ROB. */
655 void clearInROB() { status.reset(RobEntry); }
656
657 /** Returns whether or not this instruction is in the ROB. */
658 bool isInROB() const { return status[RobEntry]; }
659
660 /** Sets this instruction as squashed in the ROB. */
661 void setSquashedInROB() { status.set(SquashedInROB); }
662
663 /** Returns whether or not this instruction is squashed in the ROB. */
664 bool isSquashedInROB() const { return status[SquashedInROB]; }
665
666 /** Read the PC of this instruction. */
667 const Addr readPC() const { return PC; }
668
669 /** Set the next PC of this instruction (its actual target). */
670 void setNextPC(uint64_t val)
671 {
672 nextPC = val;
673 }
674
675 /** Set the next NPC of this instruction (the target in Mips or Sparc).*/
676 void setNextNPC(uint64_t val)
677 {
678 nextNPC = val;
679 }
680
681 /** Sets the ASID. */
682 void setASID(short addr_space_id) { asid = addr_space_id; }
683
684 /** Sets the thread id. */
685 void setTid(unsigned tid) { threadNumber = tid; }
686
687 /** Sets the pointer to the thread state. */
688 void setThreadState(ImplState *state) { thread = state; }
689
690 /** Returns the thread context. */
691 ThreadContext *tcBase() { return thread->getTC(); }
692
693 private:
694 /** Instruction effective address.
695 * @todo: Consider if this is necessary or not.
696 */
697 Addr instEffAddr;
698
699 /** Whether or not the effective address calculation is completed.
700 * @todo: Consider if this is necessary or not.
701 */
702 bool eaCalcDone;
703
704 public:
705 /** Sets the effective address. */
706 void setEA(Addr &ea) { instEffAddr = ea; eaCalcDone = true; }
707
708 /** Returns the effective address. */
709 const Addr &getEA() const { return instEffAddr; }
710
711 /** Returns whether or not the eff. addr. calculation has been completed. */
712 bool doneEACalc() { return eaCalcDone; }
713
714 /** Returns whether or not the eff. addr. source registers are ready. */
715 bool eaSrcsReady();
716
717 /** Whether or not the memory operation is done. */
718 bool memOpDone;
719
720 public:
721 /** Load queue index. */
722 int16_t lqIdx;
723
724 /** Store queue index. */
725 int16_t sqIdx;
726
727 /** Iterator pointing to this BaseDynInst in the list of all insts. */
728 ListIt instListIt;
729
730 /** Returns iterator to this instruction in the list of all insts. */
731 ListIt &getInstListIt() { return instListIt; }
732
733 /** Sets iterator for this instruction in the list of all insts. */
734 void setInstListIt(ListIt _instListIt) { instListIt = _instListIt; }
735
736 public:
737 /** Returns the number of consecutive store conditional failures. */
738 unsigned readStCondFailures()
739 { return thread->storeCondFailures; }
740
741 /** Sets the number of consecutive store conditional failures. */
742 void setStCondFailures(unsigned sc_failures)
743 { thread->storeCondFailures = sc_failures; }
744};
745
746template<class Impl>
747template<class T>
748inline Fault
749BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags)
750{
751 // Sometimes reads will get retried, so they may come through here
752 // twice.
753 if (!req) {
754 req = new Request();
755 req->setVirt(asid, addr, sizeof(T), flags, this->PC);
756 req->setThreadContext(thread->readCpuId(), threadNumber);
757 } else {
758 assert(addr == req->getVaddr());
759 }
760
761 if ((req->getVaddr() & (TheISA::VMPageSize - 1)) + req->getSize() >
762 TheISA::VMPageSize) {
763 return TheISA::genAlignmentFault();
764 }
765
766 fault = cpu->translateDataReadReq(req, thread);
767
768 if (fault == NoFault) {
769 effAddr = req->getVaddr();
770 physEffAddr = req->getPaddr();
771 memReqFlags = req->getFlags();
772
773#if 0
774 if (cpu->system->memctrl->badaddr(physEffAddr)) {
775 fault = TheISA::genMachineCheckFault();
776 data = (T)-1;
777 this->setExecuted();
778 } else {
779 fault = cpu->read(req, data, lqIdx);
780 }
781#else
782 fault = cpu->read(req, data, lqIdx);
783#endif
784 } else {
785 // Return a fixed value to keep simulation deterministic even
786 // along misspeculated paths.
787 data = (T)-1;
788
789 // Commit will have to clean up whatever happened. Set this
790 // instruction as executed.
791 this->setExecuted();
792 }
793
794 if (traceData) {
795 traceData->setAddr(addr);
796 traceData->setData(data);
797 }
798
799 return fault;
800}
801
802template<class Impl>
803template<class T>
804inline Fault
805BaseDynInst<Impl>::write(T data, Addr addr, unsigned flags, uint64_t *res)
806{
807 if (traceData) {
808 traceData->setAddr(addr);
809 traceData->setData(data);
810 }
811
812 assert(req == NULL);
813
814 req = new Request();
815 req->setVirt(asid, addr, sizeof(T), flags, this->PC);
816 req->setThreadContext(thread->readCpuId(), threadNumber);
817
818 if ((req->getVaddr() & (TheISA::VMPageSize - 1)) + req->getSize() >
819 TheISA::VMPageSize) {
820 return TheISA::genAlignmentFault();
821 }
822
823 fault = cpu->translateDataWriteReq(req, thread);
824
825 if (fault == NoFault) {
826 effAddr = req->getVaddr();
827 physEffAddr = req->getPaddr();
828 memReqFlags = req->getFlags();
829#if 0
830 if (cpu->system->memctrl->badaddr(physEffAddr)) {
831 fault = TheISA::genMachineCheckFault();
832 } else {
833 fault = cpu->write(req, data, sqIdx);
834 }
835#else
836 fault = cpu->write(req, data, sqIdx);
837#endif
838 }
839
840 if (res) {
841 // always return some result to keep misspeculated paths
842 // (which will ignore faults) deterministic
843 *res = (fault == NoFault) ? req->getScResult() : 0;
844 }
845
846 return fault;
847}
848
849#endif // __CPU_BASE_DYN_INST_HH__
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