2dd27496775c45b305ac8135f2f0d8e03bc155f4
1 // See LICENSE for license details.
22 processor_t::processor_t(const char* isa
, sim_t
* sim
, uint32_t id
,
24 : debug(false), halt_request(false), sim(sim
), ext(NULL
), id(id
),
25 halt_on_reset(halt_on_reset
), last_pc(1), executions(1)
27 parse_isa_string(isa
);
28 register_base_instructions();
30 mmu
= new mmu_t(sim
, this);
31 disassembler
= new disassembler_t(max_xlen
);
36 processor_t::~processor_t()
38 #ifdef RISCV_ENABLE_HISTOGRAM
39 if (histogram_enabled
)
41 fprintf(stderr
, "PC Histogram size:%zu\n", pc_histogram
.size());
42 for (auto it
: pc_histogram
)
43 fprintf(stderr
, "%0" PRIx64
" %" PRIu64
"\n", it
.first
, it
.second
);
51 static void bad_isa_string(const char* isa
)
53 fprintf(stderr
, "error: bad --isa option %s\n", isa
);
57 void processor_t::parse_isa_string(const char* str
)
59 std::string lowercase
, tmp
;
60 for (const char *r
= str
; *r
; r
++)
61 lowercase
+= std::tolower(*r
);
63 const char* p
= lowercase
.c_str();
64 const char* all_subsets
= "imafdqc";
69 if (strncmp(p
, "rv32", 4) == 0)
70 max_xlen
= 32, isa
= reg_t(1) << 30, p
+= 4;
71 else if (strncmp(p
, "rv64", 4) == 0)
73 else if (strncmp(p
, "rv", 2) == 0)
78 } else if (*p
== 'g') { // treat "G" as "IMAFD"
79 tmp
= std::string("imafd") + (p
+1);
81 } else if (*p
!= 'i') {
85 isa_string
= "rv" + std::to_string(max_xlen
) + p
;
86 isa
|= 1L << ('s' - 'a'); // advertise support for supervisor mode
87 isa
|= 1L << ('u' - 'a'); // advertise support for user mode
90 isa
|= 1L << (*p
- 'a');
92 if (auto next
= strchr(all_subsets
, *p
)) {
93 all_subsets
= next
+ 1;
95 } else if (*p
== 'x') {
96 const char* ext
= p
+1, *end
= ext
;
99 register_extension(find_extension(std::string(ext
, end
- ext
).c_str())());
106 if (supports_extension('D') && !supports_extension('F'))
109 if (supports_extension('Q') && !supports_extension('D'))
112 if (supports_extension('Q') && max_xlen
< 64)
118 void state_t::reset()
120 memset(this, 0, sizeof(*this));
123 load_reservation
= -1;
125 for (unsigned int i
= 0; i
< num_triggers
; i
++)
126 mcontrol
[i
].type
= 2;
129 void processor_t::set_debug(bool value
)
133 ext
->set_debug(value
);
136 void processor_t::set_histogram(bool value
)
138 histogram_enabled
= value
;
139 #ifndef RISCV_ENABLE_HISTOGRAM
141 fprintf(stderr
, "PC Histogram support has not been properly enabled;");
142 fprintf(stderr
, " please re-build the riscv-isa-run project using \"configure --enable-histogram\".\n");
147 void processor_t::reset()
150 state
.dcsr
.halt
= halt_on_reset
;
151 halt_on_reset
= false;
152 set_csr(CSR_MSTATUS
, state
.mstatus
);
155 ext
->reset(); // reset the extension
158 // Count number of contiguous 0 bits starting from the LSB.
159 static int ctz(reg_t val
)
163 while ((val
& 1) == 0)
168 void processor_t::take_interrupt(reg_t pending_interrupts
)
170 reg_t mie
= get_field(state
.mstatus
, MSTATUS_MIE
);
171 reg_t m_enabled
= state
.prv
< PRV_M
|| (state
.prv
== PRV_M
&& mie
);
172 reg_t enabled_interrupts
= pending_interrupts
& ~state
.mideleg
& -m_enabled
;
174 reg_t sie
= get_field(state
.mstatus
, MSTATUS_SIE
);
175 reg_t s_enabled
= state
.prv
< PRV_S
|| (state
.prv
== PRV_S
&& sie
);
176 if (enabled_interrupts
== 0)
177 enabled_interrupts
= pending_interrupts
& state
.mideleg
& -s_enabled
;
179 if (state
.dcsr
.cause
== 0 && enabled_interrupts
)
180 throw trap_t(((reg_t
)1 << (max_xlen
-1)) | ctz(enabled_interrupts
));
183 static int xlen_to_uxl(int xlen
)
192 reg_t
processor_t::legalize_privilege(reg_t prv
)
194 assert(prv
<= PRV_M
);
196 if (!supports_extension('U'))
199 if (prv
== PRV_H
|| !supports_extension('S'))
205 void processor_t::set_privilege(reg_t prv
)
208 state
.prv
= legalize_privilege(prv
);
211 void processor_t::enter_debug_mode(uint8_t cause
)
213 state
.dcsr
.cause
= cause
;
214 state
.dcsr
.prv
= state
.prv
;
215 set_privilege(PRV_M
);
216 state
.dpc
= state
.pc
;
217 state
.pc
= DEBUG_ROM_ENTRY
;
220 void processor_t::take_trap(trap_t
& t
, reg_t epc
)
223 fprintf(stderr
, "core %3d: exception %s, epc 0x%016" PRIx64
"\n",
226 fprintf(stderr
, "core %3d: badaddr 0x%016" PRIx64
"\n", id
,
230 if (state
.dcsr
.cause
) {
231 if (t
.cause() == CAUSE_BREAKPOINT
) {
232 state
.pc
= DEBUG_ROM_ENTRY
;
234 state
.pc
= DEBUG_ROM_TVEC
;
239 if (t
.cause() == CAUSE_BREAKPOINT
&& (
240 (state
.prv
== PRV_M
&& state
.dcsr
.ebreakm
) ||
241 (state
.prv
== PRV_S
&& state
.dcsr
.ebreaks
) ||
242 (state
.prv
== PRV_U
&& state
.dcsr
.ebreaku
))) {
243 enter_debug_mode(DCSR_CAUSE_SWBP
);
247 // by default, trap to M-mode, unless delegated to S-mode
248 reg_t bit
= t
.cause();
249 reg_t deleg
= state
.medeleg
;
250 bool interrupt
= (bit
& ((reg_t
)1 << (max_xlen
-1))) != 0;
252 deleg
= state
.mideleg
, bit
&= ~((reg_t
)1 << (max_xlen
-1));
253 if (state
.prv
<= PRV_S
&& bit
< max_xlen
&& ((deleg
>> bit
) & 1)) {
254 // handle the trap in S-mode
255 state
.pc
= state
.stvec
;
256 state
.scause
= t
.cause();
259 state
.sbadaddr
= t
.get_badaddr();
261 reg_t s
= state
.mstatus
;
262 s
= set_field(s
, MSTATUS_SPIE
, get_field(s
, MSTATUS_SIE
));
263 s
= set_field(s
, MSTATUS_SPP
, state
.prv
);
264 s
= set_field(s
, MSTATUS_SIE
, 0);
265 set_csr(CSR_MSTATUS
, s
);
266 set_privilege(PRV_S
);
268 reg_t vector
= (state
.mtvec
& 1) && interrupt
? 4*bit
: 0;
269 state
.pc
= (state
.mtvec
& ~(reg_t
)1) + vector
;
271 state
.mcause
= t
.cause();
273 state
.mbadaddr
= t
.get_badaddr();
275 reg_t s
= state
.mstatus
;
276 s
= set_field(s
, MSTATUS_MPIE
, get_field(s
, MSTATUS_MIE
));
277 s
= set_field(s
, MSTATUS_MPP
, state
.prv
);
278 s
= set_field(s
, MSTATUS_MIE
, 0);
279 set_csr(CSR_MSTATUS
, s
);
280 set_privilege(PRV_M
);
283 yield_load_reservation();
286 void processor_t::disasm(insn_t insn
)
288 uint64_t bits
= insn
.bits() & ((1ULL << (8 * insn_length(insn
.bits()))) - 1);
289 if (last_pc
!= state
.pc
|| last_bits
!= bits
) {
290 if (executions
!= 1) {
291 fprintf(stderr
, "core %3d: Executed %" PRIx64
" times\n", id
, executions
);
294 fprintf(stderr
, "core %3d: 0x%016" PRIx64
" (0x%08" PRIx64
") %s\n",
295 id
, state
.pc
, bits
, disassembler
->disassemble(insn
).c_str());
304 int processor_t::paddr_bits()
306 assert(xlen
== max_xlen
);
307 return max_xlen
== 64 ? 50 : 34;
310 void processor_t::set_csr(int which
, reg_t val
)
312 val
= zext_xlen(val
);
313 reg_t delegable_ints
= MIP_SSIP
| MIP_STIP
| MIP_SEIP
| (1 << IRQ_COP
);
314 reg_t all_ints
= delegable_ints
| MIP_MSIP
| MIP_MTIP
;
319 state
.fflags
= val
& (FSR_AEXC
>> FSR_AEXC_SHIFT
);
323 state
.frm
= val
& (FSR_RD
>> FSR_RD_SHIFT
);
327 state
.fflags
= (val
& FSR_AEXC
) >> FSR_AEXC_SHIFT
;
328 state
.frm
= (val
& FSR_RD
) >> FSR_RD_SHIFT
;
331 if ((val
^ state
.mstatus
) &
332 (MSTATUS_MPP
| MSTATUS_MPRV
| MSTATUS_SUM
| MSTATUS_MXR
))
335 reg_t mask
= MSTATUS_SIE
| MSTATUS_SPIE
| MSTATUS_MIE
| MSTATUS_MPIE
336 | MSTATUS_FS
| MSTATUS_MPRV
| MSTATUS_SUM
337 | MSTATUS_MXR
| MSTATUS_TW
| MSTATUS_TVM
338 | MSTATUS_TSR
| MSTATUS_UXL
| MSTATUS_SXL
|
339 (ext
? MSTATUS_XS
: 0);
341 reg_t requested_mpp
= legalize_privilege(get_field(val
, MSTATUS_MPP
));
342 state
.mstatus
= set_field(state
.mstatus
, MSTATUS_MPP
, requested_mpp
);
343 if (supports_extension('S'))
346 state
.mstatus
= (state
.mstatus
& ~mask
) | (val
& mask
);
348 bool dirty
= (state
.mstatus
& MSTATUS_FS
) == MSTATUS_FS
;
349 dirty
|= (state
.mstatus
& MSTATUS_XS
) == MSTATUS_XS
;
351 state
.mstatus
= set_field(state
.mstatus
, MSTATUS32_SD
, dirty
);
353 state
.mstatus
= set_field(state
.mstatus
, MSTATUS64_SD
, dirty
);
355 state
.mstatus
= set_field(state
.mstatus
, MSTATUS_UXL
, xlen_to_uxl(max_xlen
));
356 state
.mstatus
= set_field(state
.mstatus
, MSTATUS_UXL
, xlen_to_uxl(max_xlen
));
357 state
.mstatus
= set_field(state
.mstatus
, MSTATUS_SXL
, xlen_to_uxl(max_xlen
));
358 // U-XLEN == S-XLEN == M-XLEN
363 reg_t mask
= MIP_SSIP
| MIP_STIP
;
364 state
.mip
= (state
.mip
& ~mask
) | (val
& mask
);
368 state
.mie
= (state
.mie
& ~all_ints
) | (val
& all_ints
);
371 state
.mideleg
= (state
.mideleg
& ~delegable_ints
) | (val
& delegable_ints
);
375 (1 << CAUSE_MISALIGNED_FETCH
) |
376 (1 << CAUSE_BREAKPOINT
) |
377 (1 << CAUSE_USER_ECALL
) |
378 (1 << CAUSE_FETCH_PAGE_FAULT
) |
379 (1 << CAUSE_LOAD_PAGE_FAULT
) |
380 (1 << CAUSE_STORE_PAGE_FAULT
);
381 state
.medeleg
= (state
.medeleg
& ~mask
) | (val
& mask
);
387 state
.minstret
= (state
.minstret
>> 32 << 32) | (val
& 0xffffffffU
);
389 state
.minstret
= val
;
393 state
.minstret
= (val
<< 32) | (state
.minstret
<< 32 >> 32);
396 state
.scounteren
= val
;
399 state
.mcounteren
= val
;
402 reg_t mask
= SSTATUS_SIE
| SSTATUS_SPIE
| SSTATUS_SPP
| SSTATUS_FS
403 | SSTATUS_XS
| SSTATUS_SUM
| SSTATUS_MXR
;
404 return set_csr(CSR_MSTATUS
, (state
.mstatus
& ~mask
) | (val
& mask
));
407 reg_t mask
= MIP_SSIP
& state
.mideleg
;
408 return set_csr(CSR_MIP
, (state
.mip
& ~mask
) | (val
& mask
));
411 return set_csr(CSR_MIE
,
412 (state
.mie
& ~state
.mideleg
) | (val
& state
.mideleg
));
416 state
.sptbr
= val
& (SPTBR32_PPN
| SPTBR32_MODE
);
417 if (max_xlen
== 64 && (get_field(val
, SPTBR64_MODE
) == SPTBR_MODE_OFF
||
418 get_field(val
, SPTBR64_MODE
) == SPTBR_MODE_SV39
||
419 get_field(val
, SPTBR64_MODE
) == SPTBR_MODE_SV48
))
420 state
.sptbr
= val
& (SPTBR64_PPN
| SPTBR64_MODE
);
423 case CSR_SEPC
: state
.sepc
= val
; break;
424 case CSR_STVEC
: state
.stvec
= val
>> 2 << 2; break;
425 case CSR_SSCRATCH
: state
.sscratch
= val
; break;
426 case CSR_SCAUSE
: state
.scause
= val
; break;
427 case CSR_SBADADDR
: state
.sbadaddr
= val
; break;
428 case CSR_MEPC
: state
.mepc
= val
; break;
429 case CSR_MTVEC
: state
.mtvec
= val
& ~(reg_t
)2; break;
430 case CSR_MSCRATCH
: state
.mscratch
= val
; break;
431 case CSR_MCAUSE
: state
.mcause
= val
; break;
432 case CSR_MBADADDR
: state
.mbadaddr
= val
; break;
434 if (!(val
& (1L << ('F' - 'A'))))
435 val
&= ~(1L << ('D' - 'A'));
437 // allow MAFDC bits in MISA to be modified
439 mask
|= 1L << ('M' - 'A');
440 mask
|= 1L << ('A' - 'A');
441 mask
|= 1L << ('F' - 'A');
442 mask
|= 1L << ('D' - 'A');
443 mask
|= 1L << ('C' - 'A');
446 isa
= (val
& mask
) | (isa
& ~mask
);
450 if (val
< state
.num_triggers
) {
456 mcontrol_t
*mc
= &state
.mcontrol
[state
.tselect
];
457 if (mc
->dmode
&& !state
.dcsr
.cause
) {
460 mc
->dmode
= get_field(val
, MCONTROL_DMODE(xlen
));
461 mc
->select
= get_field(val
, MCONTROL_SELECT
);
462 mc
->timing
= get_field(val
, MCONTROL_TIMING
);
463 mc
->action
= (mcontrol_action_t
) get_field(val
, MCONTROL_ACTION
);
464 mc
->chain
= get_field(val
, MCONTROL_CHAIN
);
465 mc
->match
= (mcontrol_match_t
) get_field(val
, MCONTROL_MATCH
);
466 mc
->m
= get_field(val
, MCONTROL_M
);
467 mc
->h
= get_field(val
, MCONTROL_H
);
468 mc
->s
= get_field(val
, MCONTROL_S
);
469 mc
->u
= get_field(val
, MCONTROL_U
);
470 mc
->execute
= get_field(val
, MCONTROL_EXECUTE
);
471 mc
->store
= get_field(val
, MCONTROL_STORE
);
472 mc
->load
= get_field(val
, MCONTROL_LOAD
);
473 // Assume we're here because of csrw.
480 if (state
.mcontrol
[state
.tselect
].dmode
&& !state
.dcsr
.cause
) {
483 if (state
.tselect
< state
.num_triggers
) {
484 state
.tdata2
[state
.tselect
] = val
;
488 state
.dcsr
.prv
= get_field(val
, DCSR_PRV
);
489 state
.dcsr
.step
= get_field(val
, DCSR_STEP
);
490 // TODO: ndreset and fullreset
491 state
.dcsr
.ebreakm
= get_field(val
, DCSR_EBREAKM
);
492 state
.dcsr
.ebreakh
= get_field(val
, DCSR_EBREAKH
);
493 state
.dcsr
.ebreaks
= get_field(val
, DCSR_EBREAKS
);
494 state
.dcsr
.ebreaku
= get_field(val
, DCSR_EBREAKU
);
495 state
.dcsr
.halt
= get_field(val
, DCSR_HALT
);
501 state
.dscratch
= val
;
506 reg_t
processor_t::get_csr(int which
)
508 uint32_t ctr_en
= -1;
509 if (state
.prv
< PRV_M
)
510 ctr_en
&= state
.mcounteren
;
511 if (state
.prv
< PRV_S
)
512 ctr_en
&= state
.scounteren
;
513 bool ctr_ok
= (ctr_en
>> (which
& 31)) & 1;
516 if (which
>= CSR_HPMCOUNTER3
&& which
<= CSR_HPMCOUNTER31
)
518 if (xlen
== 32 && which
>= CSR_HPMCOUNTER3H
&& which
<= CSR_HPMCOUNTER31H
)
521 if (which
>= CSR_MHPMCOUNTER3
&& which
<= CSR_MHPMCOUNTER31
)
523 if (xlen
== 32 && which
>= CSR_MHPMCOUNTER3H
&& which
<= CSR_MHPMCOUNTER31H
)
525 if (which
>= CSR_MHPMEVENT3
&& which
<= CSR_MHPMEVENT31
)
532 if (!supports_extension('F'))
537 if (!supports_extension('F'))
542 if (!supports_extension('F'))
544 return (state
.fflags
<< FSR_AEXC_SHIFT
) | (state
.frm
<< FSR_RD_SHIFT
);
548 return state
.minstret
;
552 return state
.minstret
;
556 return state
.minstret
>> 32;
558 case CSR_SCOUNTEREN
: return state
.scounteren
;
559 case CSR_MCOUNTEREN
: return state
.mcounteren
;
561 reg_t mask
= SSTATUS_SIE
| SSTATUS_SPIE
| SSTATUS_SPP
| SSTATUS_FS
562 | SSTATUS_XS
| SSTATUS_SUM
| SSTATUS_UXL
;
563 reg_t sstatus
= state
.mstatus
& mask
;
564 if ((sstatus
& SSTATUS_FS
) == SSTATUS_FS
||
565 (sstatus
& SSTATUS_XS
) == SSTATUS_XS
)
566 sstatus
|= (xlen
== 32 ? SSTATUS32_SD
: SSTATUS64_SD
);
569 case CSR_SIP
: return state
.mip
& state
.mideleg
;
570 case CSR_SIE
: return state
.mie
& state
.mideleg
;
571 case CSR_SEPC
: return state
.sepc
;
572 case CSR_SBADADDR
: return state
.sbadaddr
;
573 case CSR_STVEC
: return state
.stvec
;
576 return state
.scause
| ((state
.scause
>> (max_xlen
-1)) << (xlen
-1));
579 if (get_field(state
.mstatus
, MSTATUS_TVM
))
580 require_privilege(PRV_M
);
582 case CSR_SSCRATCH
: return state
.sscratch
;
583 case CSR_MSTATUS
: return state
.mstatus
;
584 case CSR_MIP
: return state
.mip
;
585 case CSR_MIE
: return state
.mie
;
586 case CSR_MEPC
: return state
.mepc
;
587 case CSR_MSCRATCH
: return state
.mscratch
;
588 case CSR_MCAUSE
: return state
.mcause
;
589 case CSR_MBADADDR
: return state
.mbadaddr
;
590 case CSR_MISA
: return isa
;
591 case CSR_MARCHID
: return 0;
592 case CSR_MIMPID
: return 0;
593 case CSR_MVENDORID
: return 0;
594 case CSR_MHARTID
: return id
;
595 case CSR_MTVEC
: return state
.mtvec
;
596 case CSR_MEDELEG
: return state
.medeleg
;
597 case CSR_MIDELEG
: return state
.mideleg
;
598 case CSR_TSELECT
: return state
.tselect
;
600 if (state
.tselect
< state
.num_triggers
) {
602 mcontrol_t
*mc
= &state
.mcontrol
[state
.tselect
];
603 v
= set_field(v
, MCONTROL_TYPE(xlen
), mc
->type
);
604 v
= set_field(v
, MCONTROL_DMODE(xlen
), mc
->dmode
);
605 v
= set_field(v
, MCONTROL_MASKMAX(xlen
), mc
->maskmax
);
606 v
= set_field(v
, MCONTROL_SELECT
, mc
->select
);
607 v
= set_field(v
, MCONTROL_TIMING
, mc
->timing
);
608 v
= set_field(v
, MCONTROL_ACTION
, mc
->action
);
609 v
= set_field(v
, MCONTROL_CHAIN
, mc
->chain
);
610 v
= set_field(v
, MCONTROL_MATCH
, mc
->match
);
611 v
= set_field(v
, MCONTROL_M
, mc
->m
);
612 v
= set_field(v
, MCONTROL_H
, mc
->h
);
613 v
= set_field(v
, MCONTROL_S
, mc
->s
);
614 v
= set_field(v
, MCONTROL_U
, mc
->u
);
615 v
= set_field(v
, MCONTROL_EXECUTE
, mc
->execute
);
616 v
= set_field(v
, MCONTROL_STORE
, mc
->store
);
617 v
= set_field(v
, MCONTROL_LOAD
, mc
->load
);
624 if (state
.tselect
< state
.num_triggers
) {
625 return state
.tdata2
[state
.tselect
];
630 case CSR_TDATA3
: return 0;
634 v
= set_field(v
, DCSR_XDEBUGVER
, 1);
635 v
= set_field(v
, DCSR_EBREAKM
, state
.dcsr
.ebreakm
);
636 v
= set_field(v
, DCSR_EBREAKH
, state
.dcsr
.ebreakh
);
637 v
= set_field(v
, DCSR_EBREAKS
, state
.dcsr
.ebreaks
);
638 v
= set_field(v
, DCSR_EBREAKU
, state
.dcsr
.ebreaku
);
639 v
= set_field(v
, DCSR_STOPCYCLE
, 0);
640 v
= set_field(v
, DCSR_STOPTIME
, 0);
641 v
= set_field(v
, DCSR_CAUSE
, state
.dcsr
.cause
);
642 v
= set_field(v
, DCSR_STEP
, state
.dcsr
.step
);
643 v
= set_field(v
, DCSR_PRV
, state
.dcsr
.prv
);
649 return state
.dscratch
;
651 throw trap_illegal_instruction(0);
654 reg_t
illegal_instruction(processor_t
* p
, insn_t insn
, reg_t pc
)
656 throw trap_illegal_instruction(0);
659 insn_func_t
processor_t::decode_insn(insn_t insn
)
661 // look up opcode in hash table
662 size_t idx
= insn
.bits() % OPCODE_CACHE_SIZE
;
663 insn_desc_t desc
= opcode_cache
[idx
];
665 if (unlikely(insn
.bits() != desc
.match
)) {
666 // fall back to linear search
667 insn_desc_t
* p
= &instructions
[0];
668 while ((insn
.bits() & p
->mask
) != p
->match
)
672 if (p
->mask
!= 0 && p
> &instructions
[0]) {
673 if (p
->match
!= (p
-1)->match
&& p
->match
!= (p
+1)->match
) {
674 // move to front of opcode list to reduce miss penalty
675 while (--p
>= &instructions
[0])
677 instructions
[0] = desc
;
681 opcode_cache
[idx
] = desc
;
682 opcode_cache
[idx
].match
= insn
.bits();
685 return xlen
== 64 ? desc
.rv64
: desc
.rv32
;
688 void processor_t::register_insn(insn_desc_t desc
)
690 instructions
.push_back(desc
);
693 void processor_t::build_opcode_map()
696 bool operator()(const insn_desc_t
& lhs
, const insn_desc_t
& rhs
) {
697 if (lhs
.match
== rhs
.match
)
698 return lhs
.mask
> rhs
.mask
;
699 return lhs
.match
> rhs
.match
;
702 std::sort(instructions
.begin(), instructions
.end(), cmp());
704 for (size_t i
= 0; i
< OPCODE_CACHE_SIZE
; i
++)
705 opcode_cache
[i
] = {0, 0, &illegal_instruction
, &illegal_instruction
};
708 void processor_t::register_extension(extension_t
* x
)
710 for (auto insn
: x
->get_instructions())
713 for (auto disasm_insn
: x
->get_disasms())
714 disassembler
->add_insn(disasm_insn
);
716 throw std::logic_error("only one extension may be registered");
718 x
->set_processor(this);
721 void processor_t::register_base_instructions()
723 #define DECLARE_INSN(name, match, mask) \
724 insn_bits_t name##_match = (match), name##_mask = (mask);
725 #include "encoding.h"
728 #define DEFINE_INSN(name) \
729 REGISTER_INSN(this, name, name##_match, name##_mask)
730 #include "insn_list.h"
733 register_insn({0, 0, &illegal_instruction
, &illegal_instruction
});
737 bool processor_t::load(reg_t addr
, size_t len
, uint8_t* bytes
)
743 memset(bytes
, 0, len
);
744 bytes
[0] = get_field(state
.mip
, MIP_MSIP
);
753 bool processor_t::store(reg_t addr
, size_t len
, const uint8_t* bytes
)
759 state
.mip
= set_field(state
.mip
, MIP_MSIP
, bytes
[0]);
768 void processor_t::trigger_updated()
771 mmu
->check_triggers_fetch
= false;
772 mmu
->check_triggers_load
= false;
773 mmu
->check_triggers_store
= false;
775 for (unsigned i
= 0; i
< state
.num_triggers
; i
++) {
776 if (state
.mcontrol
[i
].execute
) {
777 mmu
->check_triggers_fetch
= true;
779 if (state
.mcontrol
[i
].load
) {
780 mmu
->check_triggers_load
= true;
782 if (state
.mcontrol
[i
].store
) {
783 mmu
->check_triggers_store
= true;