1 /* MIPS Simulator definition.
2 Copyright (C) 1997 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
35 #include "sim-basics.h"
37 typedef address_word sim_cia
;
40 /* Get the number of instructions. FIXME: must be a more elegant way
43 #define MAX_INSNS (nr_itable_entries)
44 #define INSN_NAME(i) itable[(i)].name
50 /* Depreciated macros and types for manipulating 64bit values. Use
51 ../common/sim-bits.h and ../common/sim-endian.h macros instead. */
53 typedef signed64 word64
;
54 typedef unsigned64 uword64
;
56 #define WORD64LO(t) (unsigned int)((t)&0xFFFFFFFF)
57 #define WORD64HI(t) (unsigned int)(((uword64)(t))>>32)
58 #define SET64LO(t) (((uword64)(t))&0xFFFFFFFF)
59 #define SET64HI(t) (((uword64)(t))<<32)
60 #define WORD64(h,l) ((word64)((SET64HI(h)|SET64LO(l))))
61 #define UWORD64(h,l) (SET64HI(h)|SET64LO(l))
63 /* Sign-extend the given value (e) as a value (b) bits long. We cannot
64 assume the HI32bits of the operand are zero, so we must perform a
65 mask to ensure we can use the simple subtraction to sign-extend. */
66 #define SIGNEXTEND(e,b) \
68 (((e) & ((uword64) 1 << ((b) - 1))) \
69 ? (((e) & (((uword64) 1 << (b)) - 1)) - ((uword64)1 << (b))) \
70 : ((e) & (((((uword64) 1 << ((b) - 1)) - 1) << 1) | 1))))
72 /* Check if a value will fit within a halfword: */
73 #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))
77 /* Floating-point operations: */
81 /* FPU registers must be one of the following types. All other values
82 are reserved (and undefined). */
88 /* The following are well outside the normal acceptable format
89 range, and are used in the register status vector. */
90 fmt_unknown
= 0x10000000,
91 fmt_uninterpreted
= 0x20000000,
92 fmt_uninterpreted_32
= 0x40000000,
93 fmt_uninterpreted_64
= 0x80000000,
96 unsigned64 value_fpr
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int fpr
, FP_formats
));
97 #define ValueFPR(FPR,FMT) value_fpr (SD, CPU, cia, (FPR), (FMT))
99 void store_fpr
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int fpr
, FP_formats fmt
, unsigned64 value
));
100 #define StoreFPR(FPR,FMT,VALUE) store_fpr (SD, CPU, cia, (FPR), (FMT), (VALUE))
102 int NaN
PARAMS ((unsigned64 op
, FP_formats fmt
));
103 int Infinity
PARAMS ((unsigned64 op
, FP_formats fmt
));
104 int Less
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
105 int Equal
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
106 unsigned64 AbsoluteValue
PARAMS ((unsigned64 op
, FP_formats fmt
));
107 unsigned64 Negate
PARAMS ((unsigned64 op
, FP_formats fmt
));
108 unsigned64 Add
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
109 unsigned64 Sub
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
110 unsigned64 Multiply
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
111 unsigned64 Divide
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
112 unsigned64 Recip
PARAMS ((unsigned64 op
, FP_formats fmt
));
113 unsigned64 SquareRoot
PARAMS ((unsigned64 op
, FP_formats fmt
));
114 unsigned64 Max
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
115 unsigned64 Min
PARAMS ((unsigned64 op1
, unsigned64 op2
, FP_formats fmt
));
116 unsigned64 convert
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int rm
, unsigned64 op
, FP_formats from
, FP_formats to
));
117 #define Convert(rm,op,from,to) \
118 convert (SD, CPU, cia, rm, op, from, to)
120 /* Macro to update FPSR condition-code field. This is complicated by
121 the fact that there is a hole in the index range of the bits within
122 the FCSR register. Also, the number of bits visible depends on the
123 MIPS ISA version being supported. */
125 #define SETFCC(cc,v) {\
126 int bit = ((cc == 0) ? 23 : (24 + (cc)));\
127 FCSR = ((FCSR & ~(1 << bit)) | ((v) << bit));\
129 #define GETFCC(cc) (((((cc) == 0) ? (FCSR & (1 << 23)) : (FCSR & (1 << (24 + (cc))))) != 0) ? 1U : 0)
131 /* This should be the COC1 value at the start of the preceding
133 #define PREVCOC1() ((STATE & simPCOC1) ? 1 : 0)
136 #define SizeFGR() (WITH_TARGET_FLOATING_POINT_BITSIZE)
138 /* They depend on the CPU being simulated */
139 #define SizeFGR() ((WITH_TARGET_WORD_BITSIZE == 64 && ((SR & status_FR) == 1)) ? 64 : 32)
142 /* Standard FCRS bits: */
143 #define IR (0) /* Inexact Result */
144 #define UF (1) /* UnderFlow */
145 #define OF (2) /* OverFlow */
146 #define DZ (3) /* Division by Zero */
147 #define IO (4) /* Invalid Operation */
148 #define UO (5) /* Unimplemented Operation */
150 /* Get masks for individual flags: */
151 #if 1 /* SAFE version */
152 #define FP_FLAGS(b) (((unsigned)(b) < 5) ? (1 << ((b) + 2)) : 0)
153 #define FP_ENABLE(b) (((unsigned)(b) < 5) ? (1 << ((b) + 7)) : 0)
154 #define FP_CAUSE(b) (((unsigned)(b) < 6) ? (1 << ((b) + 12)) : 0)
156 #define FP_FLAGS(b) (1 << ((b) + 2))
157 #define FP_ENABLE(b) (1 << ((b) + 7))
158 #define FP_CAUSE(b) (1 << ((b) + 12))
161 #define FP_FS (1 << 24) /* MIPS III onwards : Flush to Zero */
163 #define FP_MASK_RM (0x3)
165 #define FP_RM_NEAREST (0) /* Round to nearest (Round) */
166 #define FP_RM_TOZERO (1) /* Round to zero (Trunc) */
167 #define FP_RM_TOPINF (2) /* Round to Plus infinity (Ceil) */
168 #define FP_RM_TOMINF (3) /* Round to Minus infinity (Floor) */
169 #define GETRM() (int)((FCSR >> FP_SH_RM) & FP_MASK_RM)
173 /* Integer ALU operations: */
177 #define ALU32_END(ANS) \
178 if (ALU32_HAD_OVERFLOW) \
179 SignalExceptionIntegerOverflow (); \
180 (ANS) = ALU32_OVERFLOW_RESULT
183 #define ALU64_END(ANS) \
184 if (ALU64_HAD_OVERFLOW) \
185 SignalExceptionIntegerOverflow (); \
186 (ANS) = ALU64_OVERFLOW_RESULT;
189 /* start-sanitize-r5900 */
191 /* Figure 10-5 FPU Control/Status Register.
192 Note: some of these bits are different to what is found in a
193 standard MIPS manual. */
195 R5900_FCSR_C
= BIT (23), /* OK */
196 R5900_FCSR_I
= BIT (17),
197 R5900_FCSR_D
= BIT (16),
198 R5900_FCSR_O
= BIT (15),
199 R5900_FCSR_U
= BIT (14),
200 R5900_FCSR_CAUSE
= MASK (16,14),
201 R5900_FCSR_SI
= BIT (6),
202 R5900_FCSR_SD
= BIT (5),
203 R5900_FCSR_SO
= BIT (4),
204 R5900_FCSR_SU
= BIT (3),
207 typedef struct _sim_r5900_cpu
{
209 /* The R5900 has 32 x 128bit general purpose registers.
210 Fortunatly, the high 64 bits are only touched by multimedia (MMI)
211 instructions. The normal mips instructions just use the lower 64
212 bits. To avoid changing the older parts of the simulator to
213 handle this weirdness, the high 64 bits of each register are kept
214 in a separate array (registers1). The high 64 bits of any
215 register are by convention refered by adding a '1' to the end of
216 the normal register's name. So LO still refers to the low 64
217 bits of the LO register, LO1 refers to the high 64 bits of that
219 signed_word gpr1
[32];
220 #define GPR1 ((CPU)->r5900.gpr1)
223 #define LO1 ((CPU)->r5900.lo1)
224 #define HI1 ((CPU)->r5900.hi1)
226 /* The R5900 defines a shift amount register, that controls the
227 amount of certain shift instructions */
228 unsigned_word sa
; /* the shift amount register */
229 #define REGISTER_SA (124) /* GET RID IF THIS! */
230 #define SA ((CPU)->r5900.sa)
232 /* The R5900, in addition to the (almost) standard floating point
233 registers, defines a 32 bit accumulator. This is used in
234 multiply/accumulate style instructions */
235 fp_word acc
; /* floating-point accumulator */
236 #define ACC ((CPU)->r5900.acc)
238 /* See comments below about needing to count cycles between updating
239 and setting HI/LO registers */
242 #define HI1ACCESS ((CPU)->r5900.hi1access)
243 #define LO1ACCESS ((CPU)->r5900.lo1access)
245 #define CHECKHILO(s) {\
246 if ((HIACCESS != 0) || (LOACCESS != 0) || (HI1ACCESS != 0) || (LO1ACCESS != 0))\
247 sim_io_eprintf(sd,"%s over-writing HI and LO registers values (PC = 0x%s HLPC = 0x%s)\n",(s),pr_addr(PC),pr_addr(HLPC));\
253 #define BYTES_IN_MMI_REGS (sizeof(signed_word) + sizeof(signed_word))
254 #define HALFWORDS_IN_MMI_REGS (BYTES_IN_MMI_REGS/2)
255 #define WORDS_IN_MMI_REGS (BYTES_IN_MMI_REGS/4)
256 #define DOUBLEWORDS_IN_MMI_REGS (BYTES_IN_MMI_REGS/8)
258 #define BYTES_IN_MIPS_REGS (sizeof(signed_word))
259 #define HALFWORDS_IN_MIPS_REGS (BYTES_IN_MIPS_REGS/2)
260 #define WORDS_IN_MIPS_REGS (BYTES_IN_MIPS_REGS/4)
261 #define DOUBLEWORDS_IN_MIPS_REGS (BYTES_IN_MIPS_REGS/8)
263 /* SUB_REG_FETCH - return as lvalue some sub-part of a "register"
264 T - type of the sub part
265 TC - # of T's in the mips part of the "register"
266 I - index (from 0) of desired sub part
267 A - low part of "register"
268 A1 - high part of register
270 #define SUB_REG_FETCH(T,TC,A,A1,I) \
271 (*(((I) < (TC) ? (T*)(A) : (T*)(A1)) \
272 + (CURRENT_HOST_BYTE_ORDER == BIG_ENDIAN \
273 ? ((TC) - 1 - (I) % (TC)) \
280 GPR_<type>(R,I) - return, as lvalue, the I'th <type> of general register R
281 where <type> has two letters:
282 1 is S=signed or U=unsigned
283 2 is B=byte H=halfword W=word D=doubleword
286 #define SUB_REG_SB(A,A1,I) SUB_REG_FETCH(signed8, BYTES_IN_MIPS_REGS, A, A1, I)
287 #define SUB_REG_SH(A,A1,I) SUB_REG_FETCH(signed16, HALFWORDS_IN_MIPS_REGS, A, A1, I)
288 #define SUB_REG_SW(A,A1,I) SUB_REG_FETCH(signed32, WORDS_IN_MIPS_REGS, A, A1, I)
289 #define SUB_REG_SD(A,A1,I) SUB_REG_FETCH(signed64, DOUBLEWORDS_IN_MIPS_REGS, A, A1, I)
291 #define SUB_REG_UB(A,A1,I) SUB_REG_FETCH(unsigned8, BYTES_IN_MIPS_REGS, A, A1, I)
292 #define SUB_REG_UH(A,A1,I) SUB_REG_FETCH(unsigned16, HALFWORDS_IN_MIPS_REGS, A, A1, I)
293 #define SUB_REG_UW(A,A1,I) SUB_REG_FETCH(unsigned32, WORDS_IN_MIPS_REGS, A, A1, I)
294 #define SUB_REG_UD(A,A1,I) SUB_REG_FETCH(unsigned64, DOUBLEWORDS_IN_MIPS_REGS, A, A1, I)
296 #define GPR_SB(R,I) SUB_REG_SB(&GPR[R], &GPR1[R], I)
297 #define GPR_SH(R,I) SUB_REG_SH(&GPR[R], &GPR1[R], I)
298 #define GPR_SW(R,I) SUB_REG_SW(&GPR[R], &GPR1[R], I)
299 #define GPR_SD(R,I) SUB_REG_SD(&GPR[R], &GPR1[R], I)
301 #define GPR_UB(R,I) SUB_REG_UB(&GPR[R], &GPR1[R], I)
302 #define GPR_UH(R,I) SUB_REG_UH(&GPR[R], &GPR1[R], I)
303 #define GPR_UW(R,I) SUB_REG_UW(&GPR[R], &GPR1[R], I)
304 #define GPR_UD(R,I) SUB_REG_UD(&GPR[R], &GPR1[R], I)
307 #define RS_SB(I) SUB_REG_SB(&rs_reg, &rs_reg1, I)
308 #define RS_SH(I) SUB_REG_SH(&rs_reg, &rs_reg1, I)
309 #define RS_SW(I) SUB_REG_SW(&rs_reg, &rs_reg1, I)
310 #define RS_SD(I) SUB_REG_SD(&rs_reg, &rs_reg1, I)
312 #define RS_UB(I) SUB_REG_UB(&rs_reg, &rs_reg1, I)
313 #define RS_UH(I) SUB_REG_UH(&rs_reg, &rs_reg1, I)
314 #define RS_UW(I) SUB_REG_UW(&rs_reg, &rs_reg1, I)
315 #define RS_UD(I) SUB_REG_UD(&rs_reg, &rs_reg1, I)
317 #define RT_SB(I) SUB_REG_SB(&rt_reg, &rt_reg1, I)
318 #define RT_SH(I) SUB_REG_SH(&rt_reg, &rt_reg1, I)
319 #define RT_SW(I) SUB_REG_SW(&rt_reg, &rt_reg1, I)
320 #define RT_SD(I) SUB_REG_SD(&rt_reg, &rt_reg1, I)
322 #define RT_UB(I) SUB_REG_UB(&rt_reg, &rt_reg1, I)
323 #define RT_UH(I) SUB_REG_UH(&rt_reg, &rt_reg1, I)
324 #define RT_UW(I) SUB_REG_UW(&rt_reg, &rt_reg1, I)
325 #define RT_UD(I) SUB_REG_UD(&rt_reg, &rt_reg1, I)
329 #define LO_SB(I) SUB_REG_SB(&LO, &LO1, I)
330 #define LO_SH(I) SUB_REG_SH(&LO, &LO1, I)
331 #define LO_SW(I) SUB_REG_SW(&LO, &LO1, I)
332 #define LO_SD(I) SUB_REG_SD(&LO, &LO1, I)
334 #define LO_UB(I) SUB_REG_UB(&LO, &LO1, I)
335 #define LO_UH(I) SUB_REG_UH(&LO, &LO1, I)
336 #define LO_UW(I) SUB_REG_UW(&LO, &LO1, I)
337 #define LO_UD(I) SUB_REG_UD(&LO, &LO1, I)
339 #define HI_SB(I) SUB_REG_SB(&HI, &HI1, I)
340 #define HI_SH(I) SUB_REG_SH(&HI, &HI1, I)
341 #define HI_SW(I) SUB_REG_SW(&HI, &HI1, I)
342 #define HI_SD(I) SUB_REG_SD(&HI, &HI1, I)
344 #define HI_UB(I) SUB_REG_UB(&HI, &HI1, I)
345 #define HI_UH(I) SUB_REG_UH(&HI, &HI1, I)
346 #define HI_UW(I) SUB_REG_UW(&HI, &HI1, I)
347 #define HI_UD(I) SUB_REG_UD(&HI, &HI1, I)
349 /* end-sanitize-r5900 */
353 /* The following is probably not used for MIPS IV onwards: */
354 /* Slots for delayed register updates. For the moment we just have a
355 fixed number of slots (rather than a more generic, dynamic
356 system). This keeps the simulator fast. However, we only allow
357 for the register update to be delayed for a single instruction
359 #define PSLOTS (8) /* Maximum number of instruction cycles */
361 typedef struct _pending_write_queue
{
365 int slot_delay
[PSLOTS
];
366 int slot_size
[PSLOTS
];
367 int slot_bit
[PSLOTS
];
368 void *slot_dest
[PSLOTS
];
369 unsigned64 slot_value
[PSLOTS
];
370 } pending_write_queue
;
372 #ifndef PENDING_TRACE
373 #define PENDING_TRACE 0
375 #define PENDING_IN ((CPU)->pending.in)
376 #define PENDING_OUT ((CPU)->pending.out)
377 #define PENDING_TOTAL ((CPU)->pending.total)
378 #define PENDING_SLOT_SIZE ((CPU)->pending.slot_size)
379 #define PENDING_SLOT_BIT ((CPU)->pending.slot_size)
380 #define PENDING_SLOT_DELAY ((CPU)->pending.slot_delay)
381 #define PENDING_SLOT_DEST ((CPU)->pending.slot_dest)
382 #define PENDING_SLOT_VALUE ((CPU)->pending.slot_value)
384 /* Invalidate the pending write queue, all pending writes are
387 #define PENDING_INVALIDATE() \
388 memset (&(CPU)->pending, 0, sizeof ((CPU)->pending))
390 /* Schedule a write to DEST for N cycles time. For 64 bit
391 destinations, schedule two writes. For floating point registers,
392 the caller should schedule a write to both the dest register and
393 the FPR_STATE register. When BIT is non-negative, only BIT of DEST
396 #define PENDING_SCHED(DEST,VAL,DELAY,BIT) \
398 if (PENDING_SLOT_DEST[PENDING_IN] != NULL) \
399 sim_engine_abort (SD, CPU, cia, \
400 "PENDING_SCHED - buffer overflow\n"); \
402 sim_io_printf (SD, "PENDING_SCHED - dest 0x%lx, val 0x%lx, pending_in %d, pending_out %d, pending_total %d\n", (unsigned long) (DEST), (unsigned long) (VAL), PENDING_IN, PENDING_OUT, PENDING_TOTAL); \
403 PENDING_SLOT_DELAY[PENDING_IN] = (DELAY) + 1; \
404 PENDING_SLOT_DEST[PENDING_IN] = &(DEST); \
405 PENDING_SLOT_VALUE[PENDING_IN] = (VAL); \
406 PENDING_SLOT_SIZE[PENDING_IN] = sizeof (DEST); \
407 PENDING_SLOT_BIT[PENDING_IN] = (BIT); \
410 #define PENDING_WRITE(DEST,VAL,DELAY) PENDING_SCHED(DEST,VAL,DELAY,-1)
411 #define PENDING_BIT(DEST,VAL,DELAY,BIT) PENDING_SCHED(DEST,VAL,DELAY,BIT)
413 #define PENDING_TICK() pending_tick (SD, CPU, cia)
415 #define PENDING_FLUSH() abort () /* think about this one */
416 #define PENDING_FP() abort () /* think about this one */
418 /* For backward compatibility */
419 #define PENDING_FILL(R,VAL) \
421 if ((R) >= FGRIDX && (R) < FGRIDX + NR_FGR) \
422 PENDING_SCHED(FGR[(R) - FGRIDX], VAL, 2, -1); \
424 PENDING_SCHED(GPR[(R)], VAL, 2, -1); \
432 /* The following are internal simulator state variables: */
433 #define CIA_GET(CPU) ((CPU)->registers[PCIDX] + 0)
434 #define CIA_SET(CPU,CIA) ((CPU)->registers[PCIDX] = (CIA))
435 address_word dspc
; /* delay-slot PC */
436 #define DSPC ((CPU)->dspc)
438 /* Issue a delay slot instruction immediatly by re-calling
440 #define DELAY_SLOT(TARGET) \
442 address_word target = (TARGET); \
443 instruction_word delay_insn; \
444 sim_events_slip (SD, 1); \
445 CIA = CIA + 4; /* NOTE not mips16 */ \
446 STATE |= simDELAYSLOT; \
447 delay_insn = IMEM32 (CIA); /* NOTE not mips16 */ \
448 idecode_issue (CPU_, delay_insn, (CIA)); \
449 STATE &= ~simDELAYSLOT; \
452 #define NULLIFY_NEXT_INSTRUCTION() \
454 sim_events_slip (SD, 1); \
455 dotrace (SD, CPU, tracefh, 2, NIA, 4, "load instruction"); \
461 /* State of the simulator */
463 unsigned int dsstate
;
464 #define STATE ((CPU)->state)
465 #define DSSTATE ((CPU)->dsstate)
467 /* Flags in the "state" variable: */
468 #define simHALTEX (1 << 2) /* 0 = run; 1 = halt on exception */
469 #define simHALTIN (1 << 3) /* 0 = run; 1 = halt on interrupt */
470 #define simTRACE (1 << 8) /* 0 = do nothing; 1 = trace address activity */
471 #define simPCOC0 (1 << 17) /* COC[1] from current */
472 #define simPCOC1 (1 << 18) /* COC[1] from previous */
473 #define simDELAYSLOT (1 << 24) /* 0 = do nothing; 1 = delay slot entry exists */
474 #define simSKIPNEXT (1 << 25) /* 0 = do nothing; 1 = skip instruction */
475 #define simSIGINT (1 << 28) /* 0 = do nothing; 1 = SIGINT has occured */
476 #define simJALDELAYSLOT (1 << 29) /* 1 = in jal delay slot */
478 #define ENGINE_ISSUE_PREFIX_HOOK() \
480 /* Perform any pending writes */ \
482 /* Set previous flag, depending on current: */ \
483 if (STATE & simPCOC0) \
486 STATE &= ~simPCOC1; \
487 /* and update the current value: */ \
491 STATE &= ~simPCOC0; \
495 /* This is nasty, since we have to rely on matching the register
496 numbers used by GDB. Unfortunately, depending on the MIPS target
497 GDB uses different register numbers. We cannot just include the
498 relevant "gdb/tm.h" link, since GDB may not be configured before
499 the sim world, and also the GDB header file requires too much other
503 #define LAST_EMBED_REGNUM (89)
504 #define NUM_REGS (LAST_EMBED_REGNUM + 1)
505 /* start-sanitize-r5900 */
507 #define NUM_REGS (128)
508 /* end-sanitize-r5900 */
511 /* start-sanitize-sky */
515 /* Number of machine registers */
516 #define NUM_VU_REGS 152
518 #define NUM_R5900_REGS 128
521 #define NUM_REGS (NUM_R5900_REGS + 2*(NUM_VU_REGS))
522 #endif /* no tm-txvu.h */
524 /* end-sanitize-sky */
526 /* To keep this default simulator simple, and fast, we use a direct
527 vector of registers. The internal simulator engine then uses
528 manifests to access the correct slot. */
530 unsigned_word registers
[LAST_EMBED_REGNUM
+ 1];
531 int register_widths
[NUM_REGS
];
532 #define REGISTERS ((CPU)->registers)
534 #define GPR (®ISTERS[0])
535 #define GPR_SET(N,VAL) (REGISTERS[(N)] = (VAL))
537 /* While space is allocated for the floating point registers in the
538 main registers array, they are stored separatly. This is because
539 their size may not necessarily match the size of either the
540 general-purpose or system specific registers */
544 #define FGR ((CPU)->fgr)
546 #define LO (REGISTERS[33])
547 #define HI (REGISTERS[34])
549 #define PC (REGISTERS[PCIDX])
550 #define CAUSE (REGISTERS[36])
552 #define SR (REGISTERS[SRIDX]) /* CPU status register */
554 #define FCR0 (REGISTERS[FCR0IDX]) /* really a 32bit register */
555 #define FCR31IDX (70)
556 #define FCR31 (REGISTERS[FCR31IDX]) /* really a 32bit register */
558 #define Debug (REGISTERS[86])
559 #define DEPC (REGISTERS[87])
560 #define EPC (REGISTERS[88])
561 #define COCIDX (LAST_EMBED_REGNUM + 2) /* special case : outside the normal range */
563 unsigned_word c0_config_reg
;
564 #define C0_CONFIG ((CPU)->c0_config_reg)
566 /* The following are pseudonyms for standard registers */
567 #define ZERO (REGISTERS[0])
568 #define V0 (REGISTERS[2])
569 #define A0 (REGISTERS[4])
570 #define A1 (REGISTERS[5])
571 #define A2 (REGISTERS[6])
572 #define A3 (REGISTERS[7])
573 #define SP (REGISTERS[29])
574 #define RA (REGISTERS[31])
576 /* Keep the current format state for each register: */
577 FP_formats fpr_state
[32];
578 #define FPR_STATE ((CPU)->fpr_state)
580 pending_write_queue pending
;
582 /* LLBIT = Load-Linked bit. A bit of "virtual" state used by atomic
583 read-write instructions. It is set when a linked load occurs. It
584 is tested and cleared by the conditional store. It is cleared
585 (during other CPU operations) when a store to the location would
586 no longer be atomic. In particular, it is cleared by exception
587 return instructions. */
589 #define LLBIT ((CPU)->llbit)
592 /* The HIACCESS and LOACCESS counts are used to ensure that
593 corruptions caused by using the HI or LO register to close to a
594 following operation are spotted. */
598 #define HIACCESS ((CPU)->hiaccess)
599 #define LOACCESS ((CPU)->loaccess)
603 /* If either of the preceding two instructions have accessed the HI
604 or LO registers, then the values they see should be
605 undefined. However, to keep the simulator world simple, we just
606 let them use the value read and raise a warning to notify the
608 #define CHECKHILO(s) {\
609 if ((HIACCESS != 0) || (LOACCESS != 0)) \
610 sim_io_eprintf(sd,"%s over-writing HI and LO registers values (PC = 0x%s HLPC = 0x%s)\n",(s),pr_addr(PC),pr_addr(HLPC));\
614 #if !defined CHECKHILO
615 /* The 4300 and a few other processors have interlocks on hi/lo
616 register reads, and hence do not have this problem. To avoid
617 spurious warnings, we just disable this always. */
621 /* start-sanitize-r5900 */
624 /* end-sanitize-r5900 */
625 /* start-sanitize-vr5400 */
627 /* The MDMX ISA has a very very large accumulator */
628 unsigned8 acc
[3 * 8];
629 /* end-sanitize-vr5400 */
635 /* MIPS specific simulator watch config */
637 void watch_options_install
PARAMS ((SIM_DESC sd
));
646 /* FIXME: At present much of the simulator is still static */
651 sim_cpu cpu
[MAX_NR_PROCESSORS
];
653 #define STATE_CPU(sd,n) (&(sd)->cpu[n])
655 #define STATE_CPU(sd,n) (&(sd)->cpu[0])
663 /* Status information: */
665 /* TODO : these should be the bitmasks for these bits within the
666 status register. At the moment the following are VR4300
668 #define status_KSU_mask (0x3) /* mask for KSU bits */
669 #define status_KSU_shift (3) /* shift for field */
670 #define ksu_kernel (0x0)
671 #define ksu_supervisor (0x1)
672 #define ksu_user (0x2)
673 #define ksu_unknown (0x3)
675 #define status_IE (1 << 0) /* Interrupt enable */
676 #define status_EXL (1 << 1) /* Exception level */
677 #define status_RE (1 << 25) /* Reverse Endian in user mode */
678 #define status_FR (1 << 26) /* enables MIPS III additional FP registers */
679 #define status_SR (1 << 20) /* soft reset or NMI */
680 #define status_BEV (1 << 22) /* Location of general exception vectors */
681 #define status_TS (1 << 21) /* TLB shutdown has occurred */
682 #define status_ERL (1 << 2) /* Error level */
683 #define status_RP (1 << 27) /* Reduced Power mode */
685 #define cause_BD ((unsigned)1 << 31) /* Exception in branch delay slot */
687 /* NOTE: We keep the following status flags as bit values (1 for true,
688 0 for false). This allows them to be used in binary boolean
689 operations without worrying about what exactly the non-zero true
693 #define UserMode ((((SR & status_KSU_mask) >> status_KSU_shift) == ksu_user) ? 1 : 0)
696 /* Hardware configuration. Affects endianness of LoadMemory and
697 StoreMemory and the endianness of Kernel and Supervisor mode
698 execution. The value is 0 for little-endian; 1 for big-endian. */
699 #define BigEndianMem (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN)
700 /*(state & simBE) ? 1 : 0)*/
703 /* This mode is selected if in User mode with the RE bit being set in
704 SR (Status Register). It reverses the endianness of load and store
706 #define ReverseEndian (((SR & status_RE) && UserMode) ? 1 : 0)
709 /* The endianness for load and store instructions (0=little;1=big). In
710 User mode this endianness may be switched by setting the state_RE
711 bit in the SR register. Thus, BigEndianCPU may be computed as
712 (BigEndianMem EOR ReverseEndian). */
713 #define BigEndianCPU (BigEndianMem ^ ReverseEndian) /* Already bits */
719 /* NOTE: These numbers depend on the processor architecture being
721 #define Interrupt (0)
722 #define TLBModification (1)
725 #define AddressLoad (4)
726 #define AddressStore (5)
727 #define InstructionFetch (6)
728 #define DataReference (7)
729 #define SystemCall (8)
730 #define BreakPoint (9)
731 #define ReservedInstruction (10)
732 #define CoProcessorUnusable (11)
733 #define IntegerOverflow (12) /* Arithmetic overflow (IDT monitor raises SIGFPE) */
736 #define DebugBreakPoint (16)
739 /* The following exception code is actually private to the simulator
740 world. It is *NOT* a processor feature, and is used to signal
741 run-time errors in the simulator. */
742 #define SimulatorFault (0xFFFFFFFF)
744 void signal_exception (SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int exception
, ...);
745 #define SignalException(exc,instruction) signal_exception (SD, CPU, cia, (exc), (instruction))
746 #define SignalExceptionInterrupt() signal_exception (SD, CPU, NULL_CIA, Interrupt)
747 #define SignalExceptionInstructionFetch() signal_exception (SD, CPU, cia, InstructionFetch)
748 #define SignalExceptionAddressStore() signal_exception (SD, CPU, cia, AddressStore)
749 #define SignalExceptionAddressLoad() signal_exception (SD, CPU, cia, AddressLoad)
750 #define SignalExceptionSimulatorFault(buf) signal_exception (SD, CPU, cia, SimulatorFault, buf)
751 #define SignalExceptionFPE() signal_exception (SD, CPU, cia, FPE)
752 #define SignalExceptionIntegerOverflow() signal_exception (SD, CPU, cia, IntegerOverflow)
753 #define SignalExceptionCoProcessorUnusable() signal_exception (SD, CPU, cia, CoProcessorUnusable)
756 /* Co-processor accesses */
758 void cop_lw
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int coproc_num
, int coproc_reg
, unsigned int memword
));
759 void cop_ld
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int coproc_num
, int coproc_reg
, uword64 memword
));
760 unsigned int cop_sw
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int coproc_num
, int coproc_reg
));
761 uword64 cop_sd
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int coproc_num
, int coproc_reg
));
763 #define COP_LW(coproc_num,coproc_reg,memword) \
764 cop_lw (SD, CPU, cia, coproc_num, coproc_reg, memword)
765 #define COP_LD(coproc_num,coproc_reg,memword) \
766 cop_ld (SD, CPU, cia, coproc_num, coproc_reg, memword)
767 #define COP_SW(coproc_num,coproc_reg) \
768 cop_sw (SD, CPU, cia, coproc_num, coproc_reg)
769 #define COP_SD(coproc_num,coproc_reg) \
770 cop_sd (SD, CPU, cia, coproc_num, coproc_reg)
772 void decode_coproc
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, unsigned int instruction
));
773 #define DecodeCoproc(instruction) \
774 decode_coproc (SD, CPU, cia, (instruction))
778 /* Memory accesses */
780 /* The following are generic to all versions of the MIPS architecture
783 /* Memory Access Types (for CCA): */
785 #define CachedNoncoherent (1)
786 #define CachedCoherent (2)
789 #define isINSTRUCTION (1 == 0) /* FALSE */
790 #define isDATA (1 == 1) /* TRUE */
791 #define isLOAD (1 == 0) /* FALSE */
792 #define isSTORE (1 == 1) /* TRUE */
793 #define isREAL (1 == 0) /* FALSE */
794 #define isRAW (1 == 1) /* TRUE */
795 /* The parameter HOST (isTARGET / isHOST) is ignored */
796 #define isTARGET (1 == 0) /* FALSE */
797 /* #define isHOST (1 == 1) TRUE */
799 /* The "AccessLength" specifications for Loads and Stores. NOTE: This
800 is the number of bytes minus 1. */
801 #define AccessLength_BYTE (0)
802 #define AccessLength_HALFWORD (1)
803 #define AccessLength_TRIPLEBYTE (2)
804 #define AccessLength_WORD (3)
805 #define AccessLength_QUINTIBYTE (4)
806 #define AccessLength_SEXTIBYTE (5)
807 #define AccessLength_SEPTIBYTE (6)
808 #define AccessLength_DOUBLEWORD (7)
809 #define AccessLength_QUADWORD (15)
811 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
));
812 #define AddressTranslation(vAddr,IorD,LorS,pAddr,CCA,host,raw) \
813 address_translation (SD, CPU, cia, vAddr, IorD, LorS, pAddr, CCA, raw)
815 void load_memory
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, uword64
* memvalp
, uword64
* memval1p
, int CCA
, int AccessLength
, address_word pAddr
, address_word vAddr
, int IorD
));
816 #define LoadMemory(memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD,raw) \
817 load_memory (SD, CPU, cia, memvalp, memval1p, CCA, AccessLength, pAddr, vAddr, IorD)
819 void store_memory
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int CCA
, int AccessLength
, uword64 MemElem
, uword64 MemElem1
, address_word pAddr
, address_word vAddr
));
820 #define StoreMemory(CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr,raw) \
821 store_memory (SD, CPU, cia, CCA, AccessLength, MemElem, MemElem1, pAddr, vAddr)
823 void cache_op
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int op
, address_word pAddr
, address_word vAddr
, unsigned int instruction
));
824 #define CacheOp(op,pAddr,vAddr,instruction) \
825 cache_op (SD, CPU, cia, op, pAddr, vAddr, instruction)
827 void sync_operation
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int stype
));
828 #define SyncOperation(stype) \
829 sync_operation (SD, CPU, cia, (stype))
831 void prefetch
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, int CCA
, address_word pAddr
, address_word vAddr
, int DATA
, int hint
));
832 #define Prefetch(CCA,pAddr,vAddr,DATA,hint) \
833 prefetch (SD, CPU, cia, CCA, pAddr, vAddr, DATA, hint)
835 unsigned32 ifetch32
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, address_word vaddr
));
836 #define IMEM32(CIA) ifetch32 (SD, CPU, (CIA), (CIA))
837 unsigned16 ifetch16
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
, address_word vaddr
));
838 #define IMEM16(CIA,NR) ifetch16 (SD, CPU, (CIA), ((CIA) & ~1) + 2 * (NR))
839 #define IMEM16_IMMED(CIA,NR) ifetch16 (SD, CPU, (CIA), ((CIA) & ~1) + 2 * (NR))
841 void dotrace
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, FILE *tracefh
, int type
, SIM_ADDR address
, int width
, char *comment
, ...));
844 void pending_tick
PARAMS ((SIM_DESC sd
, sim_cpu
*cpu
, address_word cia
));