1 /* MIPS Simulator definition.
2 Copyright (C) 1997, 1998 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
5 This file is part of GDB, the GNU debugger.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 /* This simulator doesn't cache the Current Instruction Address */
25 /* #define SIM_ENGINE_HALT_HOOK(SD, LAST_CPU, CIA) */
26 /* #define SIM_ENGINE_RESUME_HOOK(SD, LAST_CPU, CIA) */
28 #define SIM_HAVE_BIENDIAN
31 /* hobble some common features for moment */
32 #define WITH_WATCHPOINTS 1
33 #define WITH_MODULO_MEMORY 1
36 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
37 mips_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), (TRANSFER), (ERROR))
39 #include "sim-basics.h"
41 typedef address_word sim_cia;
46 /* Depreciated macros and types for manipulating 64bit values. Use
47 ../common/sim-bits.h and ../common/sim-endian.h macros instead. */
49 typedef signed64 word64;
50 typedef unsigned64 uword64;
52 #define WORD64LO(t) (unsigned int)((t)&0xFFFFFFFF)
53 #define WORD64HI(t) (unsigned int)(((uword64)(t))>>32)
54 #define SET64LO(t) (((uword64)(t))&0xFFFFFFFF)
55 #define SET64HI(t) (((uword64)(t))<<32)
56 #define WORD64(h,l) ((word64)((SET64HI(h)|SET64LO(l))))
57 #define UWORD64(h,l) (SET64HI(h)|SET64LO(l))
59 /* Sign-extend the given value (e) as a value (b) bits long. We cannot
60 assume the HI32bits of the operand are zero, so we must perform a
61 mask to ensure we can use the simple subtraction to sign-extend. */
62 #define SIGNEXTEND(e,b) \
64 (((e) & ((uword64) 1 << ((b) - 1))) \
65 ? (((e) & (((uword64) 1 << (b)) - 1)) - ((uword64)1 << (b))) \
66 : ((e) & (((((uword64) 1 << ((b) - 1)) - 1) << 1) | 1))))
68 /* Check if a value will fit within a halfword: */
69 #define NOTHALFWORDVALUE(v) ((((((uword64)(v)>>16) == 0) && !((v) & ((unsigned)1 << 15))) || (((((uword64)(v)>>32) == 0xFFFFFFFF) && ((((uword64)(v)>>16) & 0xFFFF) == 0xFFFF)) && ((v) & ((unsigned)1 << 15)))) ? (1 == 0) : (1 == 1))
73 /* Floating-point operations: */
77 /* FPU registers must be one of the following types. All other values
78 are reserved (and undefined). */
84 /* The following are well outside the normal acceptable format
85 range, and are used in the register status vector. */
86 fmt_unknown = 0x10000000,
87 fmt_uninterpreted = 0x20000000,
88 fmt_uninterpreted_32 = 0x40000000,
89 fmt_uninterpreted_64 = 0x80000000U,
92 unsigned64 value_fpr PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int fpr, FP_formats));
93 #define ValueFPR(FPR,FMT) value_fpr (SD, CPU, cia, (FPR), (FMT))
95 void store_fpr PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int fpr, FP_formats fmt, unsigned64 value));
96 #define StoreFPR(FPR,FMT,VALUE) store_fpr (SD, CPU, cia, (FPR), (FMT), (VALUE))
98 int NaN PARAMS ((unsigned64 op, FP_formats fmt));
99 int Infinity PARAMS ((unsigned64 op, FP_formats fmt));
100 int Less PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
101 int Equal PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
102 unsigned64 AbsoluteValue PARAMS ((unsigned64 op, FP_formats fmt));
103 unsigned64 Negate PARAMS ((unsigned64 op, FP_formats fmt));
104 unsigned64 Add PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
105 unsigned64 Sub PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
106 unsigned64 Multiply PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
107 unsigned64 Divide PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
108 unsigned64 Recip PARAMS ((unsigned64 op, FP_formats fmt));
109 unsigned64 SquareRoot PARAMS ((unsigned64 op, FP_formats fmt));
110 unsigned64 Max PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
111 unsigned64 Min PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
112 unsigned64 convert PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int rm, unsigned64 op, FP_formats from, FP_formats to));
113 #define Convert(rm,op,from,to) \
114 convert (SD, CPU, cia, rm, op, from, to)
116 /* Macro to update FPSR condition-code field. This is complicated by
117 the fact that there is a hole in the index range of the bits within
118 the FCSR register. Also, the number of bits visible depends on the
119 MIPS ISA version being supported. */
121 #define SETFCC(cc,v) {\
122 int bit = ((cc == 0) ? 23 : (24 + (cc)));\
123 FCSR = ((FCSR & ~(1 << bit)) | ((v) << bit));\
125 #define GETFCC(cc) (((((cc) == 0) ? (FCSR & (1 << 23)) : (FCSR & (1 << (24 + (cc))))) != 0) ? 1U : 0)
127 /* This should be the COC1 value at the start of the preceding
129 #define PREVCOC1() ((STATE & simPCOC1) ? 1 : 0)
131 #ifdef TARGET_ENABLE_FR
132 /* FIXME: this should be enabled for all targets, but needs testing first. */
133 #define SizeFGR() (((WITH_TARGET_FLOATING_POINT_BITSIZE) == 64) \
134 ? ((SR & status_FR) ? 64 : 32) \
135 : (WITH_TARGET_FLOATING_POINT_BITSIZE))
137 #define SizeFGR() (WITH_TARGET_FLOATING_POINT_BITSIZE)
140 /* Standard FCRS bits: */
141 #define IR (0) /* Inexact Result */
142 #define UF (1) /* UnderFlow */
143 #define OF (2) /* OverFlow */
144 #define DZ (3) /* Division by Zero */
145 #define IO (4) /* Invalid Operation */
146 #define UO (5) /* Unimplemented Operation */
148 /* Get masks for individual flags: */
149 #if 1 /* SAFE version */
150 #define FP_FLAGS(b) (((unsigned)(b) < 5) ? (1 << ((b) + 2)) : 0)
151 #define FP_ENABLE(b) (((unsigned)(b) < 5) ? (1 << ((b) + 7)) : 0)
152 #define FP_CAUSE(b) (((unsigned)(b) < 6) ? (1 << ((b) + 12)) : 0)
154 #define FP_FLAGS(b) (1 << ((b) + 2))
155 #define FP_ENABLE(b) (1 << ((b) + 7))
156 #define FP_CAUSE(b) (1 << ((b) + 12))
159 #define FP_FS (1 << 24) /* MIPS III onwards : Flush to Zero */
161 #define FP_MASK_RM (0x3)
163 #define FP_RM_NEAREST (0) /* Round to nearest (Round) */
164 #define FP_RM_TOZERO (1) /* Round to zero (Trunc) */
165 #define FP_RM_TOPINF (2) /* Round to Plus infinity (Ceil) */
166 #define FP_RM_TOMINF (3) /* Round to Minus infinity (Floor) */
167 #define GETRM() (int)((FCSR >> FP_SH_RM) & FP_MASK_RM)
174 /* HI/LO register accesses */
176 /* For some MIPS targets, the HI/LO registers have certain timing
177 restrictions in that, for instance, a read of a HI register must be
178 separated by at least three instructions from a preceeding read.
180 The struct below is used to record the last access by each of A MT,
181 MF or other OP instruction to a HI/LO register. See mips.igen for
184 typedef struct _hilo_access {
189 typedef struct _hilo_history {
198 /* Integer ALU operations: */
202 #define ALU32_END(ANS) \
203 if (ALU32_HAD_OVERFLOW) \
204 SignalExceptionIntegerOverflow (); \
205 (ANS) = (signed32) ALU32_OVERFLOW_RESULT
208 #define ALU64_END(ANS) \
209 if (ALU64_HAD_OVERFLOW) \
210 SignalExceptionIntegerOverflow (); \
211 (ANS) = ALU64_OVERFLOW_RESULT;
217 /* The following is probably not used for MIPS IV onwards: */
218 /* Slots for delayed register updates. For the moment we just have a
219 fixed number of slots (rather than a more generic, dynamic
220 system). This keeps the simulator fast. However, we only allow
221 for the register update to be delayed for a single instruction
223 #define PSLOTS (8) /* Maximum number of instruction cycles */
225 typedef struct _pending_write_queue {
229 int slot_delay[PSLOTS];
230 int slot_size[PSLOTS];
231 int slot_bit[PSLOTS];
232 void *slot_dest[PSLOTS];
233 unsigned64 slot_value[PSLOTS];
234 } pending_write_queue;
236 #ifndef PENDING_TRACE
237 #define PENDING_TRACE 0
239 #define PENDING_IN ((CPU)->pending.in)
240 #define PENDING_OUT ((CPU)->pending.out)
241 #define PENDING_TOTAL ((CPU)->pending.total)
242 #define PENDING_SLOT_SIZE ((CPU)->pending.slot_size)
243 #define PENDING_SLOT_BIT ((CPU)->pending.slot_bit)
244 #define PENDING_SLOT_DELAY ((CPU)->pending.slot_delay)
245 #define PENDING_SLOT_DEST ((CPU)->pending.slot_dest)
246 #define PENDING_SLOT_VALUE ((CPU)->pending.slot_value)
248 /* Invalidate the pending write queue, all pending writes are
251 #define PENDING_INVALIDATE() \
252 memset (&(CPU)->pending, 0, sizeof ((CPU)->pending))
254 /* Schedule a write to DEST for N cycles time. For 64 bit
255 destinations, schedule two writes. For floating point registers,
256 the caller should schedule a write to both the dest register and
257 the FPR_STATE register. When BIT is non-negative, only BIT of DEST
260 #define PENDING_SCHED(DEST,VAL,DELAY,BIT) \
262 if (PENDING_SLOT_DEST[PENDING_IN] != NULL) \
263 sim_engine_abort (SD, CPU, cia, \
264 "PENDING_SCHED - buffer overflow\n"); \
266 sim_io_eprintf (SD, "PENDING_SCHED - 0x%lx - dest 0x%lx, val 0x%lx, bit %d, size %d, pending_in %d, pending_out %d, pending_total %d\n", \
267 (unsigned long) cia, (unsigned long) &(DEST), \
268 (unsigned long) (VAL), (BIT), (int) sizeof (DEST),\
269 PENDING_IN, PENDING_OUT, PENDING_TOTAL); \
270 PENDING_SLOT_DELAY[PENDING_IN] = (DELAY) + 1; \
271 PENDING_SLOT_DEST[PENDING_IN] = &(DEST); \
272 PENDING_SLOT_VALUE[PENDING_IN] = (VAL); \
273 PENDING_SLOT_SIZE[PENDING_IN] = sizeof (DEST); \
274 PENDING_SLOT_BIT[PENDING_IN] = (BIT); \
275 PENDING_IN = (PENDING_IN + 1) % PSLOTS; \
276 PENDING_TOTAL += 1; \
279 #define PENDING_WRITE(DEST,VAL,DELAY) PENDING_SCHED(DEST,VAL,DELAY,-1)
280 #define PENDING_BIT(DEST,VAL,DELAY,BIT) PENDING_SCHED(DEST,VAL,DELAY,BIT)
282 #define PENDING_TICK() pending_tick (SD, CPU, cia)
284 #define PENDING_FLUSH() abort () /* think about this one */
285 #define PENDING_FP() abort () /* think about this one */
287 /* For backward compatibility */
288 #define PENDING_FILL(R,VAL) \
290 if ((R) >= FGRIDX && (R) < FGRIDX + NR_FGR) \
292 PENDING_SCHED(FGR[(R) - FGRIDX], VAL, 1, -1); \
293 PENDING_SCHED(FPR_STATE[(R) - FGRIDX], fmt_uninterpreted, 1, -1); \
296 PENDING_SCHED(GPR[(R)], VAL, 1, -1); \
304 /* The following are internal simulator state variables: */
305 #define CIA_GET(CPU) ((CPU)->registers[PCIDX] + 0)
306 #define CIA_SET(CPU,CIA) ((CPU)->registers[PCIDX] = (CIA))
307 address_word dspc; /* delay-slot PC */
308 #define DSPC ((CPU)->dspc)
310 #define DELAY_SLOT(TARGET) NIA = delayslot32 (SD_, (TARGET))
311 #define NULLIFY_NEXT_INSTRUCTION() NIA = nullify_next_insn32 (SD_)
314 /* State of the simulator */
316 unsigned int dsstate;
317 #define STATE ((CPU)->state)
318 #define DSSTATE ((CPU)->dsstate)
320 /* Flags in the "state" variable: */
321 #define simHALTEX (1 << 2) /* 0 = run; 1 = halt on exception */
322 #define simHALTIN (1 << 3) /* 0 = run; 1 = halt on interrupt */
323 #define simTRACE (1 << 8) /* 0 = do nothing; 1 = trace address activity */
324 #define simPCOC0 (1 << 17) /* COC[1] from current */
325 #define simPCOC1 (1 << 18) /* COC[1] from previous */
326 #define simDELAYSLOT (1 << 24) /* 0 = do nothing; 1 = delay slot entry exists */
327 #define simSKIPNEXT (1 << 25) /* 0 = do nothing; 1 = skip instruction */
328 #define simSIGINT (1 << 28) /* 0 = do nothing; 1 = SIGINT has occured */
329 #define simJALDELAYSLOT (1 << 29) /* 1 = in jal delay slot */
331 #define ENGINE_ISSUE_PREFIX_HOOK() \
333 /* Perform any pending writes */ \
335 /* Set previous flag, depending on current: */ \
336 if (STATE & simPCOC0) \
339 STATE &= ~simPCOC1; \
340 /* and update the current value: */ \
344 STATE &= ~simPCOC0; \
348 /* This is nasty, since we have to rely on matching the register
349 numbers used by GDB. Unfortunately, depending on the MIPS target
350 GDB uses different register numbers. We cannot just include the
351 relevant "gdb/tm.h" link, since GDB may not be configured before
352 the sim world, and also the GDB header file requires too much other
356 #define LAST_EMBED_REGNUM (89)
357 #define NUM_REGS (LAST_EMBED_REGNUM + 1)
365 FLOP_ADD, FLOP_SUB, FLOP_MUL, FLOP_MADD,
366 FLOP_MSUB, FLOP_MAX=10, FLOP_MIN, FLOP_ABS,
367 FLOP_ITOF0=14, FLOP_FTOI0=18, FLOP_NEG=23
370 /* To keep this default simulator simple, and fast, we use a direct
371 vector of registers. The internal simulator engine then uses
372 manifests to access the correct slot. */
374 unsigned_word registers[LAST_EMBED_REGNUM + 1];
376 int register_widths[NUM_REGS];
377 #define REGISTERS ((CPU)->registers)
379 #define GPR (®ISTERS[0])
380 #define GPR_SET(N,VAL) (REGISTERS[(N)] = (VAL))
382 /* While space is allocated for the floating point registers in the
383 main registers array, they are stored separatly. This is because
384 their size may not necessarily match the size of either the
385 general-purpose or system specific registers */
389 #define FGR ((CPU)->fgr)
391 #define LO (REGISTERS[33])
392 #define HI (REGISTERS[34])
394 #define PC (REGISTERS[PCIDX])
395 #define CAUSE (REGISTERS[36])
397 #define SR (REGISTERS[SRIDX]) /* CPU status register */
399 #define FCR0 (REGISTERS[FCR0IDX]) /* really a 32bit register */
400 #define FCR31IDX (70)
401 #define FCR31 (REGISTERS[FCR31IDX]) /* really a 32bit register */
403 #define Debug (REGISTERS[86])
404 #define DEPC (REGISTERS[87])
405 #define EPC (REGISTERS[88])
406 #define COCIDX (LAST_EMBED_REGNUM + 2) /* special case : outside the normal range */
408 /* All internal state modified by signal_exception() that may need to be
409 rolled back for passing moment-of-exception image back to gdb. */
410 unsigned_word exc_trigger_registers[LAST_EMBED_REGNUM + 1];
411 unsigned_word exc_suspend_registers[LAST_EMBED_REGNUM + 1];
414 #define SIM_CPU_EXCEPTION_TRIGGER(SD,CPU,CIA) mips_cpu_exception_trigger(SD,CPU,CIA)
415 #define SIM_CPU_EXCEPTION_SUSPEND(SD,CPU,EXC) mips_cpu_exception_suspend(SD,CPU,EXC)
416 #define SIM_CPU_EXCEPTION_RESUME(SD,CPU,EXC) mips_cpu_exception_resume(SD,CPU,EXC)
418 unsigned_word c0_config_reg;
419 #define C0_CONFIG ((CPU)->c0_config_reg)
421 /* The following are pseudonyms for standard registers */
422 #define ZERO (REGISTERS[0])
423 #define V0 (REGISTERS[2])
424 #define A0 (REGISTERS[4])
425 #define A1 (REGISTERS[5])
426 #define A2 (REGISTERS[6])
427 #define A3 (REGISTERS[7])
429 #define T8 (REGISTERS[T8IDX])
431 #define SP (REGISTERS[SPIDX])
433 #define RA (REGISTERS[RAIDX])
435 /* While space is allocated in the main registers arrray for some of
436 the COP0 registers, that space isn't sufficient. Unknown COP0
437 registers overflow into the array below */
439 #define NR_COP0_GPR 32
440 unsigned_word cop0_gpr[NR_COP0_GPR];
441 #define COP0_GPR ((CPU)->cop0_gpr)
442 #define COP0_BADVADDR ((unsigned32)(COP0_GPR[8]))
444 /* Keep the current format state for each register: */
445 FP_formats fpr_state[32];
446 #define FPR_STATE ((CPU)->fpr_state)
448 pending_write_queue pending;
450 /* LLBIT = Load-Linked bit. A bit of "virtual" state used by atomic
451 read-write instructions. It is set when a linked load occurs. It
452 is tested and cleared by the conditional store. It is cleared
453 (during other CPU operations) when a store to the location would
454 no longer be atomic. In particular, it is cleared by exception
455 return instructions. */
457 #define LLBIT ((CPU)->llbit)
460 /* The HIHISTORY and LOHISTORY timestamps are used to ensure that
461 corruptions caused by using the HI or LO register too close to a
462 following operation is spotted. See mips.igen for more details. */
464 hilo_history hi_history;
465 #define HIHISTORY (&(CPU)->hi_history)
466 hilo_history lo_history;
467 #define LOHISTORY (&(CPU)->lo_history)
469 #define check_branch_bug()
470 #define mark_branch_bug(TARGET)
478 /* MIPS specific simulator watch config */
480 void watch_options_install PARAMS ((SIM_DESC sd));
489 /* FIXME: At present much of the simulator is still static */
494 sim_cpu cpu[MAX_NR_PROCESSORS];
496 #define STATE_CPU(sd,n) (&(sd)->cpu[n])
498 #define STATE_CPU(sd,n) (&(sd)->cpu[0])
507 /* Status information: */
509 /* TODO : these should be the bitmasks for these bits within the
510 status register. At the moment the following are VR4300
512 #define status_KSU_mask (0x18) /* mask for KSU bits */
513 #define status_KSU_shift (3) /* shift for field */
514 #define ksu_kernel (0x0)
515 #define ksu_supervisor (0x1)
516 #define ksu_user (0x2)
517 #define ksu_unknown (0x3)
519 #define SR_KSU ((SR & status_KSU_mask) >> status_KSU_shift)
521 #define status_IE (1 << 0) /* Interrupt enable */
522 #define status_EIE (1 << 16) /* Enable Interrupt Enable */
523 #define status_EXL (1 << 1) /* Exception level */
524 #define status_RE (1 << 25) /* Reverse Endian in user mode */
525 #define status_FR (1 << 26) /* enables MIPS III additional FP registers */
526 #define status_SR (1 << 20) /* soft reset or NMI */
527 #define status_BEV (1 << 22) /* Location of general exception vectors */
528 #define status_TS (1 << 21) /* TLB shutdown has occurred */
529 #define status_ERL (1 << 2) /* Error level */
530 #define status_IM7 (1 << 15) /* Timer Interrupt Mask */
531 #define status_RP (1 << 27) /* Reduced Power mode */
533 /* Specializations for TX39 family */
534 #define status_IEc (1 << 0) /* Interrupt enable (current) */
535 #define status_KUc (1 << 1) /* Kernel/User mode */
536 #define status_IEp (1 << 2) /* Interrupt enable (previous) */
537 #define status_KUp (1 << 3) /* Kernel/User mode */
538 #define status_IEo (1 << 4) /* Interrupt enable (old) */
539 #define status_KUo (1 << 5) /* Kernel/User mode */
540 #define status_IM_mask (0xff) /* Interrupt mask */
541 #define status_IM_shift (8)
542 #define status_NMI (1 << 20) /* NMI */
543 #define status_NMI (1 << 20) /* NMI */
545 #define cause_BD ((unsigned)1 << 31) /* L1 Exception in branch delay slot */
546 #define cause_BD2 (1 << 30) /* L2 Exception in branch delay slot */
547 #define cause_CE_mask 0x30000000 /* Coprocessor exception */
548 #define cause_CE_shift 28
549 #define cause_EXC2_mask 0x00070000
550 #define cause_EXC2_shift 16
551 #define cause_IP7 (1 << 15) /* Interrupt pending */
552 #define cause_SIOP (1 << 12) /* SIO pending */
553 #define cause_IP3 (1 << 11) /* Int 0 pending */
554 #define cause_IP2 (1 << 10) /* Int 1 pending */
556 #define cause_EXC_mask (0x1c) /* Exception code */
557 #define cause_EXC_shift (2)
559 #define cause_SW0 (1 << 8) /* Software interrupt 0 */
560 #define cause_SW1 (1 << 9) /* Software interrupt 1 */
561 #define cause_IP_mask (0x3f) /* Interrupt pending field */
562 #define cause_IP_shift (10)
564 #define cause_set_EXC(x) CAUSE = (CAUSE & ~cause_EXC_mask) | ((x << cause_EXC_shift) & cause_EXC_mask)
565 #define cause_set_EXC2(x) CAUSE = (CAUSE & ~cause_EXC2_mask) | ((x << cause_EXC2_shift) & cause_EXC2_mask)
568 /* NOTE: We keep the following status flags as bit values (1 for true,
569 0 for false). This allows them to be used in binary boolean
570 operations without worrying about what exactly the non-zero true
574 #ifdef SUBTARGET_R3900
575 #define UserMode ((SR & status_KUc) ? 1 : 0)
577 #define UserMode ((((SR & status_KSU_mask) >> status_KSU_shift) == ksu_user) ? 1 : 0)
578 #endif /* SUBTARGET_R3900 */
581 /* Hardware configuration. Affects endianness of LoadMemory and
582 StoreMemory and the endianness of Kernel and Supervisor mode
583 execution. The value is 0 for little-endian; 1 for big-endian. */
584 #define BigEndianMem (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN)
585 /*(state & simBE) ? 1 : 0)*/
588 /* This mode is selected if in User mode with the RE bit being set in
589 SR (Status Register). It reverses the endianness of load and store
591 #define ReverseEndian (((SR & status_RE) && UserMode) ? 1 : 0)
594 /* The endianness for load and store instructions (0=little;1=big). In
595 User mode this endianness may be switched by setting the state_RE
596 bit in the SR register. Thus, BigEndianCPU may be computed as
597 (BigEndianMem EOR ReverseEndian). */
598 #define BigEndianCPU (BigEndianMem ^ ReverseEndian) /* Already bits */
604 /* NOTE: These numbers depend on the processor architecture being
606 enum ExceptionCause {
613 InstructionFetch = 6,
617 ReservedInstruction = 10,
618 CoProcessorUnusable = 11,
619 IntegerOverflow = 12, /* Arithmetic overflow (IDT monitor raises SIGFPE) */
622 DebugBreakPoint = 16,
627 /* The following exception code is actually private to the simulator
628 world. It is *NOT* a processor feature, and is used to signal
629 run-time errors in the simulator. */
630 SimulatorFault = 0xFFFFFFFF
633 #define TLB_REFILL (0)
634 #define TLB_INVALID (1)
637 /* The following break instructions are reserved for use by the
638 simulator. The first is used to halt the simulation. The second
639 is used by gdb for break-points. NOTE: Care must be taken, since
640 this value may be used in later revisions of the MIPS ISA. */
641 #define HALT_INSTRUCTION_MASK (0x03FFFFC0)
643 #define HALT_INSTRUCTION (0x03ff000d)
644 #define HALT_INSTRUCTION2 (0x0000ffcd)
647 #define BREAKPOINT_INSTRUCTION (0x0005000d)
648 #define BREAKPOINT_INSTRUCTION2 (0x0000014d)
652 void interrupt_event (SIM_DESC sd, void *data);
654 void signal_exception (SIM_DESC sd, sim_cpu *cpu, address_word cia, int exception, ...);
655 #define SignalException(exc,instruction) signal_exception (SD, CPU, cia, (exc), (instruction))
656 #define SignalExceptionInterrupt(level) signal_exception (SD, CPU, cia, Interrupt, level)
657 #define SignalExceptionInstructionFetch() signal_exception (SD, CPU, cia, InstructionFetch)
658 #define SignalExceptionAddressStore() signal_exception (SD, CPU, cia, AddressStore)
659 #define SignalExceptionAddressLoad() signal_exception (SD, CPU, cia, AddressLoad)
660 #define SignalExceptionDataReference() signal_exception (SD, CPU, cia, DataReference)
661 #define SignalExceptionSimulatorFault(buf) signal_exception (SD, CPU, cia, SimulatorFault, buf)
662 #define SignalExceptionFPE() signal_exception (SD, CPU, cia, FPE)
663 #define SignalExceptionIntegerOverflow() signal_exception (SD, CPU, cia, IntegerOverflow)
664 #define SignalExceptionCoProcessorUnusable() signal_exception (SD, CPU, cia, CoProcessorUnusable)
665 #define SignalExceptionNMIReset() signal_exception (SD, CPU, cia, NMIReset)
666 #define SignalExceptionTLBRefillStore() signal_exception (SD, CPU, cia, TLBStore, TLB_REFILL)
667 #define SignalExceptionTLBRefillLoad() signal_exception (SD, CPU, cia, TLBLoad, TLB_REFILL)
668 #define SignalExceptionTLBInvalidStore() signal_exception (SD, CPU, cia, TLBStore, TLB_INVALID)
669 #define SignalExceptionTLBInvalidLoad() signal_exception (SD, CPU, cia, TLBLoad, TLB_INVALID)
670 #define SignalExceptionTLBModification() signal_exception (SD, CPU, cia, TLBModification)
672 /* Co-processor accesses */
674 void cop_lw PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg, unsigned int memword));
675 void cop_ld PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg, uword64 memword));
676 unsigned int cop_sw PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg));
677 uword64 cop_sd PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg));
679 #define COP_LW(coproc_num,coproc_reg,memword) \
680 cop_lw (SD, CPU, cia, coproc_num, coproc_reg, memword)
681 #define COP_LD(coproc_num,coproc_reg,memword) \
682 cop_ld (SD, CPU, cia, coproc_num, coproc_reg, memword)
683 #define COP_SW(coproc_num,coproc_reg) \
684 cop_sw (SD, CPU, cia, coproc_num, coproc_reg)
685 #define COP_SD(coproc_num,coproc_reg) \
686 cop_sd (SD, CPU, cia, coproc_num, coproc_reg)
689 void decode_coproc PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, unsigned int instruction));
690 #define DecodeCoproc(instruction) \
691 decode_coproc (SD, CPU, cia, (instruction))
693 void sim_monitor (SIM_DESC sd, sim_cpu *cpu, address_word cia, unsigned int arg);
697 /* Memory accesses */
699 /* The following are generic to all versions of the MIPS architecture
702 /* Memory Access Types (for CCA): */
704 #define CachedNoncoherent (1)
705 #define CachedCoherent (2)
708 #define isINSTRUCTION (1 == 0) /* FALSE */
709 #define isDATA (1 == 1) /* TRUE */
710 #define isLOAD (1 == 0) /* FALSE */
711 #define isSTORE (1 == 1) /* TRUE */
712 #define isREAL (1 == 0) /* FALSE */
713 #define isRAW (1 == 1) /* TRUE */
714 /* The parameter HOST (isTARGET / isHOST) is ignored */
715 #define isTARGET (1 == 0) /* FALSE */
716 /* #define isHOST (1 == 1) TRUE */
718 /* The "AccessLength" specifications for Loads and Stores. NOTE: This
719 is the number of bytes minus 1. */
720 #define AccessLength_BYTE (0)
721 #define AccessLength_HALFWORD (1)
722 #define AccessLength_TRIPLEBYTE (2)
723 #define AccessLength_WORD (3)
724 #define AccessLength_QUINTIBYTE (4)
725 #define AccessLength_SEXTIBYTE (5)
726 #define AccessLength_SEPTIBYTE (6)
727 #define AccessLength_DOUBLEWORD (7)
728 #define AccessLength_QUADWORD (15)
730 #define LOADDRMASK (WITH_TARGET_WORD_BITSIZE == 64 \
731 ? AccessLength_DOUBLEWORD /*7*/ \
732 : AccessLength_WORD /*3*/)
733 #define PSIZE (WITH_TARGET_ADDRESS_BITSIZE)
736 INLINE_SIM_MAIN (int) address_translation PARAMS ((SIM_DESC sd, sim_cpu *, address_word cia, address_word vAddr, int IorD, int LorS, address_word *pAddr, int *CCA, int raw));
737 #define AddressTranslation(vAddr,IorD,LorS,pAddr,CCA,host,raw) \
738 address_translation (SD, CPU, cia, vAddr, IorD, LorS, pAddr, CCA, raw)
740 INLINE_SIM_MAIN (void) load_memory PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, uword64* memvalp, uword64* memval1p, int CCA, unsigned int AccessLength, address_word pAddr, address_word vAddr, int IorD));
741 #define LoadMemory(memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD,raw) \
742 load_memory (SD, CPU, cia, memvalp, memval1p, CCA, AccessLength, pAddr, vAddr, IorD)
744 INLINE_SIM_MAIN (void) store_memory PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int CCA, unsigned int AccessLength, uword64 MemElem, uword64 MemElem1, address_word pAddr, address_word vAddr));
745 #define StoreMemory(CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr,raw) \
746 store_memory (SD, CPU, cia, CCA, AccessLength, MemElem, MemElem1, pAddr, vAddr)
748 INLINE_SIM_MAIN (void) cache_op PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int op, address_word pAddr, address_word vAddr, unsigned int instruction));
749 #define CacheOp(op,pAddr,vAddr,instruction) \
750 cache_op (SD, CPU, cia, op, pAddr, vAddr, instruction)
752 INLINE_SIM_MAIN (void) sync_operation PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int stype));
753 #define SyncOperation(stype) \
754 sync_operation (SD, CPU, cia, (stype))
756 INLINE_SIM_MAIN (void) prefetch PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int CCA, address_word pAddr, address_word vAddr, int DATA, int hint));
757 #define Prefetch(CCA,pAddr,vAddr,DATA,hint) \
758 prefetch (SD, CPU, cia, CCA, pAddr, vAddr, DATA, hint)
760 INLINE_SIM_MAIN (unsigned32) ifetch32 PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, address_word vaddr));
761 #define IMEM32(CIA) ifetch32 (SD, CPU, (CIA), (CIA))
762 INLINE_SIM_MAIN (unsigned16) ifetch16 PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, address_word vaddr));
763 #define IMEM16(CIA) ifetch16 (SD, CPU, (CIA), ((CIA) & ~1))
764 #define IMEM16_IMMED(CIA,NR) ifetch16 (SD, CPU, (CIA), ((CIA) & ~1) + 2 * (NR))
766 void dotrace PARAMS ((SIM_DESC sd, sim_cpu *cpu, FILE *tracefh, int type, SIM_ADDR address, int width, char *comment, ...));
767 extern FILE *tracefh;
769 INLINE_SIM_MAIN (void) pending_tick PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia));
770 extern SIM_CORE_SIGNAL_FN mips_core_signal;
772 char* pr_addr PARAMS ((SIM_ADDR addr));
773 char* pr_uword64 PARAMS ((uword64 addr));
776 void mips_cpu_exception_trigger(SIM_DESC sd, sim_cpu* cpu, address_word pc);
777 void mips_cpu_exception_suspend(SIM_DESC sd, sim_cpu* cpu, int exception);
778 void mips_cpu_exception_resume(SIM_DESC sd, sim_cpu* cpu, int exception);
781 #if H_REVEALS_MODULE_P (SIM_MAIN_INLINE)
782 #include "sim-main.c"