2 * Copyright (c) 2009 The Regents of The University of Michigan
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31 #include "arch/mips/isa.hh"
32 #include "arch/mips/mt_constants.hh"
33 #include "arch/mips/mt.hh"
34 #include "arch/mips/pra_constants.hh"
35 #include "base/bitfield.hh"
36 #include "cpu/base.hh"
37 #include "cpu/thread_context.hh"
43 ISA::miscRegNames
[NumMiscRegs
] =
45 "Index", "MVPControl", "MVPConf0", "MVPConf1", "", "", "", "",
46 "Random", "VPEControl", "VPEConf0", "VPEConf1",
47 "YQMask", "VPESchedule", "VPEScheFBack", "VPEOpt",
48 "EntryLo0", "TCStatus", "TCBind", "TCRestart",
49 "TCHalt", "TCContext", "TCSchedule", "TCScheFBack",
50 "EntryLo1", "", "", "", "", "", "", "",
51 "Context", "ContextConfig", "", "", "", "", "", "",
52 "PageMask", "PageGrain", "", "", "", "", "", "",
53 "Wired", "SRSConf0", "SRCConf1", "SRSConf2",
54 "SRSConf3", "SRSConf4", "", "",
55 "HWREna", "", "", "", "", "", "", "",
56 "BadVAddr", "", "", "", "", "", "", "",
57 "Count", "", "", "", "", "", "", "",
58 "EntryHi", "", "", "", "", "", "", "",
59 "Compare", "", "", "", "", "", "", "",
60 "Status", "IntCtl", "SRSCtl", "SRSMap", "", "", "", "",
61 "Cause", "", "", "", "", "", "", "",
62 "EPC", "", "", "", "", "", "", "",
63 "PRId", "EBase", "", "", "", "", "", "",
64 "Config", "Config1", "Config2", "Config3", "", "", "", "",
65 "LLAddr", "", "", "", "", "", "", "",
66 "WatchLo0", "WatchLo1", "WatchLo2", "WatchLo3",
67 "WatchLo4", "WatchLo5", "WatchLo6", "WatchLo7",
68 "WatchHi0", "WatchHi1", "WatchHi2", "WatchHi3",
69 "WatchHi4", "WatchHi5", "WatchHi6", "WatchHi7",
70 "XCContext64", "", "", "", "", "", "", "",
71 "", "", "", "", "", "", "", "",
72 "", "", "", "", "", "", "", "",
73 "Debug", "TraceControl1", "TraceControl2", "UserTraceData",
74 "TraceBPC", "", "", "",
75 "DEPC", "", "", "", "", "", "", "",
76 "PerfCnt0", "PerfCnt1", "PerfCnt2", "PerfCnt3",
77 "PerfCnt4", "PerfCnt5", "PerfCnt6", "PerfCnt7",
78 "ErrCtl", "", "", "", "", "", "", "",
79 "CacheErr0", "CacheErr1", "CacheErr2", "CacheErr3", "", "", "", "",
80 "TagLo0", "DataLo1", "TagLo2", "DataLo3",
81 "TagLo4", "DataLo5", "TagLo6", "DataLo7",
82 "TagHi0", "DataHi1", "TagHi2", "DataHi3",
83 "TagHi4", "DataHi5", "TagHi6", "DataHi7",
84 "ErrorEPC", "", "", "", "", "", "", "",
85 "DESAVE", "", "", "", "", "", "", "",
94 ISA::ISA(BaseCPU
*_cpu
)
103 miscRegFile
.resize(NumMiscRegs
);
104 bankType
.resize(NumMiscRegs
);
106 for (int i
=0; i
< NumMiscRegs
; i
++) {
107 miscRegFile
[i
].resize(1);
108 bankType
[i
] = perProcessor
;
111 miscRegFile_WriteMask
.resize(NumMiscRegs
);
113 for (int i
= 0; i
< NumMiscRegs
; i
++) {
114 miscRegFile_WriteMask
[i
].push_back(0);
120 ISA::clear(unsigned tid_or_vpn
)
122 for(int i
= 0; i
< NumMiscRegs
; i
++) {
123 miscRegFile
[i
][tid_or_vpn
] = 0;
124 miscRegFile_WriteMask
[i
][tid_or_vpn
] = (long unsigned int)(-1);
129 ISA::expandForMultithreading(ThreadID num_threads
, unsigned num_vpes
)
131 // Initialize all Per-VPE regs
132 uint32_t per_vpe_regs
[] = { VPEControl
, VPEConf0
, VPEConf1
, YQMask
,
133 VPESchedule
, VPEScheFBack
, VPEOpt
, SRSConf0
,
134 SRSConf1
, SRSConf2
, SRSConf3
, SRSConf4
,
137 uint32_t num_vpe_regs
= sizeof(per_vpe_regs
) / 4;
138 for (int i
= 0; i
< num_vpe_regs
; i
++) {
140 miscRegFile
[per_vpe_regs
[i
]].resize(num_vpes
);
142 bankType
[per_vpe_regs
[i
]] = perVirtProcessor
;
145 // Initialize all Per-TC regs
146 uint32_t per_tc_regs
[] = { Status
, TCStatus
, TCBind
, TCRestart
, TCHalt
,
147 TCContext
, TCSchedule
, TCScheFBack
, Debug
,
150 uint32_t num_tc_regs
= sizeof(per_tc_regs
) / 4;
152 for (int i
= 0; i
< num_tc_regs
; i
++) {
153 miscRegFile
[per_tc_regs
[i
]].resize(num_threads
);
154 bankType
[per_tc_regs
[i
]] = perThreadContext
;
159 for (int i
=1; i
< num_vpes
; i
++) {
166 //@TODO: Use MIPS STYLE CONSTANTS (e.g. TCHALT_H instead of TCH_H)
168 ISA::reset(std::string core_name
, ThreadID num_threads
,
169 unsigned num_vpes
, BaseCPU
*_cpu
)
171 DPRINTF(MipsPRA
, "Resetting CP0 State with %i TCs and %i VPEs\n",
172 num_threads
, num_vpes
);
175 MipsISA::CoreSpecific
&cp
= cpu
->coreParams
;
177 // Do Default CP0 initialization HERE
179 // Do Initialization for MT cores here (eventually use
180 // core_name parameter to toggle this initialization)
181 // ===================================================
182 DPRINTF(MipsPRA
, "Initializing CP0 State.... ");
184 PRIdReg procId
= readMiscRegNoEffect(PRId
);
185 procId
.coOp
= cp
.CP0_PRId_CompanyOptions
;
186 procId
.coId
= cp
.CP0_PRId_CompanyID
;
187 procId
.procId
= cp
.CP0_PRId_ProcessorID
;
188 procId
.rev
= cp
.CP0_PRId_Revision
;
189 setMiscRegNoEffect(PRId
, procId
);
191 // Now, create Write Mask for ProcID register
192 MiscReg ProcID_Mask
= 0; // Read-Only register
193 replaceBits(ProcID_Mask
, 0, 32, 0);
194 setRegMask(PRId
, ProcID_Mask
);
197 ConfigReg cfg
= readMiscRegNoEffect(Config
);
198 cfg
.be
= cp
.CP0_Config_BE
;
199 cfg
.at
= cp
.CP0_Config_AT
;
200 cfg
.ar
= cp
.CP0_Config_AR
;
201 cfg
.mt
= cp
.CP0_Config_MT
;
202 cfg
.vi
= cp
.CP0_Config_VI
;
204 setMiscRegNoEffect(Config
, cfg
);
205 // Now, create Write Mask for Config register
206 MiscReg cfg_Mask
= 0x7FFF0007;
207 replaceBits(cfg_Mask
, 0, 32, 0);
208 setRegMask(Config
, cfg_Mask
);
211 Config1Reg cfg1
= readMiscRegNoEffect(Config1
);
212 cfg1
.mmuSize
= cp
.CP0_Config1_MMU
;
213 cfg1
.is
= cp
.CP0_Config1_IS
;
214 cfg1
.il
= cp
.CP0_Config1_IL
;
215 cfg1
.ia
= cp
.CP0_Config1_IA
;
216 cfg1
.ds
= cp
.CP0_Config1_DS
;
217 cfg1
.dl
= cp
.CP0_Config1_DL
;
218 cfg1
.da
= cp
.CP0_Config1_DA
;
219 cfg1
.fp
= cp
.CP0_Config1_FP
;
220 cfg1
.ep
= cp
.CP0_Config1_EP
;
221 cfg1
.wr
= cp
.CP0_Config1_WR
;
222 cfg1
.md
= cp
.CP0_Config1_MD
;
223 cfg1
.c2
= cp
.CP0_Config1_C2
;
224 cfg1
.pc
= cp
.CP0_Config1_PC
;
225 cfg1
.m
= cp
.CP0_Config1_M
;
226 setMiscRegNoEffect(Config1
, cfg1
);
227 // Now, create Write Mask for Config register
228 MiscReg cfg1_Mask
= 0; // Read Only Register
229 replaceBits(cfg1_Mask
, 0, 32, 0);
230 setRegMask(Config1
, cfg1_Mask
);
233 Config2Reg cfg2
= readMiscRegNoEffect(Config2
);
234 cfg2
.tu
= cp
.CP0_Config2_TU
;
235 cfg2
.ts
= cp
.CP0_Config2_TS
;
236 cfg2
.tl
= cp
.CP0_Config2_TL
;
237 cfg2
.ta
= cp
.CP0_Config2_TA
;
238 cfg2
.su
= cp
.CP0_Config2_SU
;
239 cfg2
.ss
= cp
.CP0_Config2_SS
;
240 cfg2
.sl
= cp
.CP0_Config2_SL
;
241 cfg2
.sa
= cp
.CP0_Config2_SA
;
242 cfg2
.m
= cp
.CP0_Config2_M
;
243 setMiscRegNoEffect(Config2
, cfg2
);
244 // Now, create Write Mask for Config register
245 MiscReg cfg2_Mask
= 0x7000F000; // Read Only Register
246 replaceBits(cfg2_Mask
, 0, 32, 0);
247 setRegMask(Config2
, cfg2_Mask
);
250 Config3Reg cfg3
= readMiscRegNoEffect(Config3
);
251 cfg3
.dspp
= cp
.CP0_Config3_DSPP
;
252 cfg3
.lpa
= cp
.CP0_Config3_LPA
;
253 cfg3
.veic
= cp
.CP0_Config3_VEIC
;
254 cfg3
.vint
= cp
.CP0_Config3_VInt
;
255 cfg3
.sp
= cp
.CP0_Config3_SP
;
256 cfg3
.mt
= cp
.CP0_Config3_MT
;
257 cfg3
.sm
= cp
.CP0_Config3_SM
;
258 cfg3
.tl
= cp
.CP0_Config3_TL
;
259 setMiscRegNoEffect(Config3
, cfg3
);
260 // Now, create Write Mask for Config register
261 MiscReg cfg3_Mask
= 0; // Read Only Register
262 replaceBits(cfg3_Mask
, 0, 32, 0);
263 setRegMask(Config3
, cfg3_Mask
);
266 EBaseReg eBase
= readMiscRegNoEffect(EBase
);
267 eBase
.cpuNum
= cp
.CP0_EBase_CPUNum
;
268 replaceBits(eBase
, 31, 31, 1);
269 setMiscRegNoEffect(EBase
, eBase
);
270 // Now, create Write Mask for Config register
271 MiscReg EB_Mask
= 0x3FFFF000;// Except Exception Base, the
272 // entire register is read only
273 replaceBits(EB_Mask
, 0, 32, 0);
274 setRegMask(EBase
, EB_Mask
);
276 // SRS Control - HSS (Highest Shadow Set)
277 SRSCtlReg scsCtl
= readMiscRegNoEffect(SRSCtl
);
278 scsCtl
.hss
= cp
.CP0_SrsCtl_HSS
;
279 setMiscRegNoEffect(SRSCtl
, scsCtl
);
280 // Now, create Write Mask for the SRS Ctl register
281 MiscReg SC_Mask
= 0x0000F3C0;
282 replaceBits(SC_Mask
, 0, 32, 0);
283 setRegMask(SRSCtl
, SC_Mask
);
285 // IntCtl - IPTI, IPPCI
286 IntCtlReg intCtl
= readMiscRegNoEffect(IntCtl
);
287 intCtl
.ipti
= cp
.CP0_IntCtl_IPTI
;
288 intCtl
.ippci
= cp
.CP0_IntCtl_IPPCI
;
289 setMiscRegNoEffect(IntCtl
, intCtl
);
290 // Now, create Write Mask for the IntCtl register
291 MiscReg IC_Mask
= 0x000003E0;
292 replaceBits(IC_Mask
, 0, 32, 0);
293 setRegMask(IntCtl
, IC_Mask
);
295 // Watch Hi - M - FIXME (More than 1 Watch register)
296 WatchHiReg watchHi
= readMiscRegNoEffect(WatchHi0
);
297 watchHi
.m
= cp
.CP0_WatchHi_M
;
298 setMiscRegNoEffect(WatchHi0
, watchHi
);
299 // Now, create Write Mask for the IntCtl register
300 MiscReg wh_Mask
= 0x7FFF0FFF;
301 replaceBits(wh_Mask
, 0, 32, 0);
302 setRegMask(WatchHi0
, wh_Mask
);
304 // Perf Ctr - M - FIXME (More than 1 PerfCnt Pair)
305 PerfCntCtlReg perfCntCtl
= readMiscRegNoEffect(PerfCnt0
);
306 perfCntCtl
.m
= cp
.CP0_PerfCtr_M
;
307 perfCntCtl
.w
= cp
.CP0_PerfCtr_W
;
308 setMiscRegNoEffect(PerfCnt0
, perfCntCtl
);
309 // Now, create Write Mask for the IntCtl register
310 MiscReg pc_Mask
= 0x00007FF;
311 replaceBits(pc_Mask
, 0, 32, 0);
312 setRegMask(PerfCnt0
, pc_Mask
);
315 setMiscRegNoEffect(CP0_Random
, 63);
316 // Now, create Write Mask for the IntCtl register
317 MiscReg random_Mask
= 0;
318 replaceBits(random_Mask
, 0, 32, 0);
319 setRegMask(CP0_Random
, random_Mask
);
322 PageGrainReg pageGrain
= readMiscRegNoEffect(PageGrain
);
323 pageGrain
.esp
= cp
.CP0_Config3_SP
;
324 setMiscRegNoEffect(PageGrain
, pageGrain
);
325 // Now, create Write Mask for the IntCtl register
326 MiscReg pg_Mask
= 0x10000000;
327 replaceBits(pg_Mask
, 0, 32, 0);
328 setRegMask(PageGrain
, pg_Mask
);
331 StatusReg status
= readMiscRegNoEffect(Status
);
332 // Only CU0 and IE are modified on a reset - everything else needs
333 // to be controlled on a per CPU model basis
335 // Enable CP0 on reset
338 // Enable ERL bit on a reset
340 // Enable BEV bit on a reset
343 setMiscRegNoEffect(Status
, status
);
344 // Now, create Write Mask for the Status register
345 MiscReg stat_Mask
= 0xFF78FF17;
346 replaceBits(stat_Mask
, 0, 32, 0);
347 setRegMask(Status
, stat_Mask
);
351 MVPConf0Reg mvpConf0
= readMiscRegNoEffect(MVPConf0
);
353 mvpConf0
.pvpe
= num_vpes
- 1;
354 mvpConf0
.ptc
= num_threads
- 1;
355 setMiscRegNoEffect(MVPConf0
, mvpConf0
);
358 VPEConf0Reg vpeConf0
= readMiscRegNoEffect(VPEConf0
);
360 setMiscRegNoEffect(VPEConf0
, vpeConf0
);
363 for (ThreadID tid
= 0; tid
< num_threads
; tid
++) {
364 TCBindReg tcBind
= readMiscRegNoEffect(TCBind
, tid
);
366 setMiscRegNoEffect(TCBind
, tcBind
, tid
);
369 TCHaltReg tcHalt
= readMiscRegNoEffect(TCHalt
);
371 setMiscRegNoEffect(TCHalt
, tcHalt
);
374 // Set TCStatus Activated to 1 for the initial thread that is running
375 TCStatusReg tcStatus
= readMiscRegNoEffect(TCStatus
);
377 setMiscRegNoEffect(TCStatus
, tcStatus
);
379 // Set Dynamically Allocatable bit to 1 for all other threads
380 for (ThreadID tid
= 1; tid
< num_threads
; tid
++) {
381 tcStatus
= readMiscRegNoEffect(TCStatus
, tid
);
383 setMiscRegNoEffect(TCStatus
, tcStatus
, tid
);
387 MiscReg Mask
= 0x7FFFFFFF;
389 // Now, create Write Mask for the Index register
390 replaceBits(Mask
, 0, 32, 0);
391 setRegMask(Index
, Mask
);
394 replaceBits(Mask
, 0, 32, 0);
395 setRegMask(EntryLo0
, Mask
);
396 setRegMask(EntryLo1
, Mask
);
399 replaceBits(Mask
, 0, 32, 0);
400 setRegMask(Context
, Mask
);
403 replaceBits(Mask
, 0, 32, 0);
404 setRegMask(PageMask
, Mask
);
407 replaceBits(Mask
, 0, 32, 0);
408 setRegMask(BadVAddr
, Mask
);
409 setRegMask(LLAddr
, Mask
);
412 replaceBits(Mask
, 0, 32, 0);
413 setRegMask(Cause
, Mask
);
418 ISA::getVPENum(ThreadID tid
)
420 TCBindReg tcBind
= miscRegFile
[TCBind
- Ctrl_Base_DepTag
][tid
];
421 return tcBind
.curVPE
;
425 ISA::readMiscRegNoEffect(int reg_idx
, ThreadID tid
)
427 int misc_reg
= reg_idx
- Ctrl_Base_DepTag
;
428 unsigned reg_sel
= (bankType
[misc_reg
] == perThreadContext
)
429 ? tid
: getVPENum(tid
);
430 DPRINTF(MipsPRA
, "Reading CP0 Register:%u Select:%u (%s) (%lx).\n",
431 misc_reg
/ 8, misc_reg
% 8, miscRegNames
[misc_reg
],
432 miscRegFile
[misc_reg
][reg_sel
]);
433 return miscRegFile
[misc_reg
][reg_sel
];
436 //@TODO: MIPS MT's register view automatically connects
437 // Status to TCStatus depending on current thread
438 //template <class TC>
440 ISA::readMiscReg(int reg_idx
, ThreadContext
*tc
, ThreadID tid
)
442 int misc_reg
= reg_idx
- Ctrl_Base_DepTag
;
443 unsigned reg_sel
= (bankType
[misc_reg
] == perThreadContext
)
444 ? tid
: getVPENum(tid
);
446 "Reading CP0 Register:%u Select:%u (%s) with effect (%lx).\n",
447 misc_reg
/ 8, misc_reg
% 8, miscRegNames
[misc_reg
],
448 miscRegFile
[misc_reg
][reg_sel
]);
450 return miscRegFile
[misc_reg
][reg_sel
];
454 ISA::setMiscRegNoEffect(int reg_idx
, const MiscReg
&val
, ThreadID tid
)
456 int misc_reg
= reg_idx
- Ctrl_Base_DepTag
;
457 unsigned reg_sel
= (bankType
[misc_reg
] == perThreadContext
)
458 ? tid
: getVPENum(tid
);
460 "[tid:%i]: Setting (direct set) CP0 Register:%u "
461 "Select:%u (%s) to %#x.\n",
462 tid
, misc_reg
/ 8, misc_reg
% 8, miscRegNames
[misc_reg
], val
);
464 miscRegFile
[misc_reg
][reg_sel
] = val
;
468 ISA::setRegMask(int reg_idx
, const MiscReg
&val
, ThreadID tid
)
471 int misc_reg
= reg_idx
- Ctrl_Base_DepTag
;
472 unsigned reg_sel
= (bankType
[misc_reg
] == perThreadContext
)
473 ? tid
: getVPENum(tid
);
475 "[tid:%i]: Setting CP0 Register: %u Select: %u (%s) to %#x\n",
476 tid
, misc_reg
/ 8, misc_reg
% 8, miscRegNames
[misc_reg
], val
);
477 miscRegFile_WriteMask
[misc_reg
][reg_sel
] = val
;
480 // PROGRAMMER'S NOTES:
481 // (1) Some CP0 Registers have fields that cannot
482 // be overwritten. Make sure to handle those particular registers
485 ISA::setMiscReg(int reg_idx
, const MiscReg
&val
,
486 ThreadContext
*tc
, ThreadID tid
)
488 int misc_reg
= reg_idx
- Ctrl_Base_DepTag
;
489 int reg_sel
= (bankType
[misc_reg
] == perThreadContext
)
490 ? tid
: getVPENum(tid
);
493 "[tid:%i]: Setting CP0 Register:%u "
494 "Select:%u (%s) to %#x, with effect.\n",
495 tid
, misc_reg
/ 8, misc_reg
% 8, miscRegNames
[misc_reg
], val
);
497 MiscReg cp0_val
= filterCP0Write(misc_reg
, reg_sel
, val
);
499 miscRegFile
[misc_reg
][reg_sel
] = cp0_val
;
501 scheduleCP0Update(1);
505 * This method doesn't need to adjust the Control Register Offset
506 * since it has already been done in the calling method
510 ISA::filterCP0Write(int misc_reg
, int reg_sel
, const MiscReg
&val
)
512 MiscReg retVal
= val
;
514 // Mask off read-only regions
515 retVal
&= miscRegFile_WriteMask
[misc_reg
][reg_sel
];
516 MiscReg curVal
= miscRegFile
[misc_reg
][reg_sel
];
517 // Mask off current alue with inverse mask (clear writeable bits)
518 curVal
&= (~miscRegFile_WriteMask
[misc_reg
][reg_sel
]);
519 retVal
|= curVal
; // Combine the two
521 "filterCP0Write: Mask: %lx, Inverse Mask: %lx, write Val: %x, "
522 "current val: %lx, written val: %x\n",
523 miscRegFile_WriteMask
[misc_reg
][reg_sel
],
524 ~miscRegFile_WriteMask
[misc_reg
][reg_sel
],
525 val
, miscRegFile
[misc_reg
][reg_sel
], retVal
);
530 ISA::scheduleCP0Update(int delay
)
536 CP0Event
*cp0_event
= new CP0Event(this, cpu
, UpdateCP0
);
537 cpu
->schedule(cp0_event
, curTick
+ cpu
->ticks(delay
));
544 ///////////////////////////////////////////////////////////////////
546 // EVALUATE CP0 STATE FOR MIPS MT
548 ///////////////////////////////////////////////////////////////////
549 MVPConf0Reg mvpConf0
= readMiscRegNoEffect(MVPConf0
);
550 ThreadID num_threads
= mvpConf0
.ptc
+ 1;
552 for (ThreadID tid
= 0; tid
< num_threads
; tid
++) {
553 TCStatusReg tcStatus
= readMiscRegNoEffect(TCStatus
, tid
);
554 TCHaltReg tcHalt
= readMiscRegNoEffect(TCHalt
, tid
);
556 //@todo: add vpe/mt check here thru mvpcontrol & vpecontrol regs
557 if (tcHalt
.h
== 1 || tcStatus
.a
== 0) {
558 haltThread(cpu
->getContext(tid
));
559 } else if (tcHalt
.h
== 0 && tcStatus
.a
== 1) {
560 restoreThread(cpu
->getContext(tid
));
564 num_threads
= mvpConf0
.ptc
+ 1;
566 // Toggle update flag after we finished updating
570 ISA::CP0Event::CP0Event(CP0
*_cp0
, BaseCPU
*_cpu
, CP0EventType e_type
)
571 : Event(CPU_Tick_Pri
), cp0(_cp0
), cpu(_cpu
), cp0EventType(e_type
)
575 ISA::CP0Event::process()
577 switch (cp0EventType
)
586 ISA::CP0Event::description() const
588 return "Coprocessor-0 event";
592 ISA::CP0Event::scheduleEvent(int delay
)
594 cpu
->reschedule(this, curTick
+ cpu
->ticks(delay
), true);
598 ISA::CP0Event::unscheduleEvent()