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df1756f4 | 1 | /* Simulator for Atmel's AVR core. |
1d506c26 | 2 | Copyright (C) 2009-2024 Free Software Foundation, Inc. |
df1756f4 TG |
3 | Written by Tristan Gingold, AdaCore. |
4 | ||
5 | This file is part of GDB, the GNU debugger. | |
6 | ||
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 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
6df01ab8 MF |
20 | /* This must come before any other includes. */ |
21 | #include "defs.h" | |
df1756f4 | 22 | |
df1756f4 | 23 | #include <string.h> |
68ed2854 | 24 | |
df1756f4 | 25 | #include "bfd.h" |
df1756f4 | 26 | #include "libiberty.h" |
df68e12b | 27 | #include "sim/sim.h" |
9943d318 MF |
28 | |
29 | #include "sim-main.h" | |
30 | #include "sim-base.h" | |
31 | #include "sim-options.h" | |
1fef66b0 | 32 | #include "sim-signal.h" |
42b68db1 | 33 | #include "avr-sim.h" |
df1756f4 TG |
34 | |
35 | /* As AVR is a 8/16 bits processor, define handy types. */ | |
36 | typedef unsigned short int word; | |
37 | typedef signed short int sword; | |
38 | typedef unsigned char byte; | |
39 | typedef signed char sbyte; | |
40 | ||
df1756f4 TG |
41 | /* Max size of I space (which is always flash on avr). */ |
42 | #define MAX_AVR_FLASH (128 * 1024) | |
43 | #define PC_MASK (MAX_AVR_FLASH - 1) | |
44 | ||
45 | /* Mac size of D space. */ | |
46 | #define MAX_AVR_SRAM (64 * 1024) | |
47 | #define SRAM_MASK (MAX_AVR_SRAM - 1) | |
48 | ||
49 | /* D space offset in ELF file. */ | |
50 | #define SRAM_VADDR 0x800000 | |
51 | ||
52 | /* Simulator specific ports. */ | |
53 | #define STDIO_PORT 0x52 | |
54 | #define EXIT_PORT 0x4F | |
55 | #define ABORT_PORT 0x49 | |
56 | ||
57 | /* GDB defined register numbers. */ | |
58 | #define AVR_SREG_REGNUM 32 | |
59 | #define AVR_SP_REGNUM 33 | |
60 | #define AVR_PC_REGNUM 34 | |
61 | ||
62 | /* Memory mapped registers. */ | |
63 | #define SREG 0x5F | |
64 | #define REG_SP 0x5D | |
65 | #define EIND 0x5C | |
66 | #define RAMPZ 0x5B | |
67 | ||
68 | #define REGX 0x1a | |
69 | #define REGY 0x1c | |
70 | #define REGZ 0x1e | |
71 | #define REGZ_LO 0x1e | |
72 | #define REGZ_HI 0x1f | |
73 | ||
74 | /* Sreg (status) bits. */ | |
75 | #define SREG_I 0x80 | |
76 | #define SREG_T 0x40 | |
77 | #define SREG_H 0x20 | |
78 | #define SREG_S 0x10 | |
79 | #define SREG_V 0x08 | |
80 | #define SREG_N 0x04 | |
81 | #define SREG_Z 0x02 | |
82 | #define SREG_C 0x01 | |
83 | ||
84 | /* In order to speed up emulation we use a simple approach: | |
85 | a code is associated with each instruction. The pre-decoding occurs | |
86 | usually once when the instruction is first seen. | |
87 | This works well because I&D spaces are separated. | |
88 | ||
89 | Missing opcodes: sleep, spm, wdr (as they are mmcu dependent). | |
90 | */ | |
91 | enum avr_opcode | |
92 | { | |
93 | /* Opcode not yet decoded. */ | |
94 | OP_unknown, | |
95 | OP_bad, | |
96 | ||
97 | OP_nop, | |
98 | ||
99 | OP_rjmp, | |
100 | OP_rcall, | |
101 | OP_ret, | |
102 | OP_reti, | |
103 | ||
104 | OP_break, | |
105 | ||
106 | OP_brbs, | |
107 | OP_brbc, | |
108 | ||
109 | OP_bset, | |
110 | OP_bclr, | |
111 | ||
112 | OP_bld, | |
113 | OP_bst, | |
114 | ||
115 | OP_sbrc, | |
116 | OP_sbrs, | |
117 | ||
118 | OP_eor, | |
119 | OP_and, | |
120 | OP_andi, | |
121 | OP_or, | |
122 | OP_ori, | |
123 | OP_com, | |
124 | OP_swap, | |
125 | OP_neg, | |
126 | ||
127 | OP_out, | |
128 | OP_in, | |
129 | OP_cbi, | |
130 | OP_sbi, | |
131 | ||
132 | OP_sbic, | |
133 | OP_sbis, | |
134 | ||
135 | OP_ldi, | |
136 | OP_cpse, | |
137 | OP_cp, | |
138 | OP_cpi, | |
139 | OP_cpc, | |
140 | OP_sub, | |
141 | OP_sbc, | |
142 | OP_sbiw, | |
143 | OP_adiw, | |
144 | OP_add, | |
145 | OP_adc, | |
146 | OP_subi, | |
147 | OP_sbci, | |
148 | OP_inc, | |
149 | OP_dec, | |
150 | OP_lsr, | |
151 | OP_ror, | |
152 | OP_asr, | |
153 | ||
154 | OP_mul, | |
155 | OP_muls, | |
156 | OP_mulsu, | |
157 | OP_fmul, | |
158 | OP_fmuls, | |
159 | OP_fmulsu, | |
160 | ||
161 | OP_mov, | |
162 | OP_movw, | |
163 | ||
164 | OP_push, | |
165 | OP_pop, | |
166 | ||
167 | OP_st_X, | |
168 | OP_st_dec_X, | |
169 | OP_st_X_inc, | |
170 | OP_st_Y_inc, | |
171 | OP_st_dec_Y, | |
172 | OP_st_Z_inc, | |
173 | OP_st_dec_Z, | |
174 | OP_std_Y, | |
175 | OP_std_Z, | |
176 | OP_ldd_Y, | |
177 | OP_ldd_Z, | |
178 | OP_ld_Z_inc, | |
179 | OP_ld_dec_Z, | |
180 | OP_ld_Y_inc, | |
181 | OP_ld_dec_Y, | |
182 | OP_ld_X, | |
183 | OP_ld_X_inc, | |
184 | OP_ld_dec_X, | |
185 | ||
186 | OP_lpm, | |
187 | OP_lpm_Z, | |
188 | OP_lpm_inc_Z, | |
189 | OP_elpm, | |
190 | OP_elpm_Z, | |
191 | OP_elpm_inc_Z, | |
192 | ||
193 | OP_ijmp, | |
194 | OP_icall, | |
195 | ||
196 | OP_eijmp, | |
197 | OP_eicall, | |
198 | ||
199 | /* 2 words opcodes. */ | |
200 | #define OP_2words OP_jmp | |
201 | OP_jmp, | |
202 | OP_call, | |
203 | OP_sts, | |
204 | OP_lds | |
205 | }; | |
206 | ||
207 | struct avr_insn_cell | |
208 | { | |
209 | /* The insn (16 bits). */ | |
210 | word op; | |
211 | ||
212 | /* Pre-decoding code. */ | |
213 | enum avr_opcode code : 8; | |
214 | /* One byte of additional information. */ | |
215 | byte r; | |
216 | }; | |
217 | ||
218 | /* I&D memories. */ | |
9943d318 | 219 | /* TODO: Should be moved to SIM_CPU. */ |
df1756f4 TG |
220 | static struct avr_insn_cell flash[MAX_AVR_FLASH]; |
221 | static byte sram[MAX_AVR_SRAM]; | |
222 | ||
df1756f4 TG |
223 | /* Sign extend a value. */ |
224 | static int sign_ext (word val, int nb_bits) | |
225 | { | |
226 | if (val & (1 << (nb_bits - 1))) | |
1d19cae7 | 227 | return val | -(1 << nb_bits); |
df1756f4 TG |
228 | return val; |
229 | } | |
230 | ||
231 | /* Insn field extractors. */ | |
232 | ||
233 | /* Extract xxxx_xxxRx_xxxx_RRRR. */ | |
234 | static inline byte get_r (word op) | |
235 | { | |
236 | return (op & 0xf) | ((op >> 5) & 0x10); | |
237 | } | |
238 | ||
239 | /* Extract xxxx_xxxxx_xxxx_RRRR. */ | |
240 | static inline byte get_r16 (word op) | |
241 | { | |
242 | return 16 + (op & 0xf); | |
243 | } | |
244 | ||
245 | /* Extract xxxx_xxxxx_xxxx_xRRR. */ | |
246 | static inline byte get_r16_23 (word op) | |
247 | { | |
248 | return 16 + (op & 0x7); | |
249 | } | |
250 | ||
251 | /* Extract xxxx_xxxD_DDDD_xxxx. */ | |
252 | static inline byte get_d (word op) | |
253 | { | |
254 | return (op >> 4) & 0x1f; | |
255 | } | |
256 | ||
257 | /* Extract xxxx_xxxx_DDDD_xxxx. */ | |
258 | static inline byte get_d16 (word op) | |
259 | { | |
260 | return 16 + ((op >> 4) & 0x0f); | |
261 | } | |
262 | ||
263 | /* Extract xxxx_xxxx_xDDD_xxxx. */ | |
264 | static inline byte get_d16_23 (word op) | |
265 | { | |
266 | return 16 + ((op >> 4) & 0x07); | |
267 | } | |
268 | ||
269 | /* Extract xxxx_xAAx_xxxx_AAAA. */ | |
270 | static inline byte get_A (word op) | |
271 | { | |
272 | return (op & 0x0f) | ((op & 0x600) >> 5); | |
273 | } | |
274 | ||
275 | /* Extract xxxx_xxxx_AAAA_Axxx. */ | |
276 | static inline byte get_biA (word op) | |
277 | { | |
278 | return (op >> 3) & 0x1f; | |
279 | } | |
280 | ||
281 | /* Extract xxxx_KKKK_xxxx_KKKK. */ | |
282 | static inline byte get_K (word op) | |
283 | { | |
284 | return (op & 0xf) | ((op & 0xf00) >> 4); | |
285 | } | |
286 | ||
287 | /* Extract xxxx_xxKK_KKKK_Kxxx. */ | |
288 | static inline int get_k (word op) | |
289 | { | |
290 | return sign_ext ((op & 0x3f8) >> 3, 7); | |
291 | } | |
292 | ||
293 | /* Extract xxxx_xxxx_xxDD_xxxx. */ | |
294 | static inline byte get_d24 (word op) | |
295 | { | |
296 | return 24 + ((op >> 3) & 6); | |
297 | } | |
298 | ||
299 | /* Extract xxxx_xxxx_KKxx_KKKK. */ | |
300 | static inline byte get_k6 (word op) | |
301 | { | |
302 | return (op & 0xf) | ((op >> 2) & 0x30); | |
303 | } | |
304 | ||
305 | /* Extract xxQx_QQxx_xxxx_xQQQ. */ | |
306 | static inline byte get_q (word op) | |
307 | { | |
308 | return (op & 7) | ((op >> 7) & 0x18)| ((op >> 8) & 0x20); | |
309 | } | |
310 | ||
311 | /* Extract xxxx_xxxx_xxxx_xBBB. */ | |
312 | static inline byte get_b (word op) | |
313 | { | |
314 | return (op & 7); | |
315 | } | |
316 | ||
317 | /* AVR is little endian. */ | |
318 | static inline word | |
319 | read_word (unsigned int addr) | |
320 | { | |
321 | return sram[addr] | (sram[addr + 1] << 8); | |
322 | } | |
323 | ||
324 | static inline void | |
325 | write_word (unsigned int addr, word w) | |
326 | { | |
327 | sram[addr] = w; | |
328 | sram[addr + 1] = w >> 8; | |
329 | } | |
330 | ||
331 | static inline word | |
332 | read_word_post_inc (unsigned int addr) | |
333 | { | |
334 | word v = read_word (addr); | |
335 | write_word (addr, v + 1); | |
336 | return v; | |
337 | } | |
338 | ||
339 | static inline word | |
340 | read_word_pre_dec (unsigned int addr) | |
341 | { | |
342 | word v = read_word (addr) - 1; | |
343 | write_word (addr, v); | |
344 | return v; | |
345 | } | |
346 | ||
347 | static void | |
348 | update_flags_logic (byte res) | |
349 | { | |
350 | sram[SREG] &= ~(SREG_S | SREG_V | SREG_N | SREG_Z); | |
351 | if (res == 0) | |
352 | sram[SREG] |= SREG_Z; | |
353 | if (res & 0x80) | |
354 | sram[SREG] |= SREG_N | SREG_S; | |
355 | } | |
356 | ||
357 | static void | |
358 | update_flags_add (byte r, byte a, byte b) | |
359 | { | |
360 | byte carry; | |
361 | ||
362 | sram[SREG] &= ~(SREG_H | SREG_S | SREG_V | SREG_N | SREG_Z | SREG_C); | |
363 | if (r & 0x80) | |
364 | sram[SREG] |= SREG_N; | |
365 | carry = (a & b) | (a & ~r) | (b & ~r); | |
366 | if (carry & 0x08) | |
367 | sram[SREG] |= SREG_H; | |
368 | if (carry & 0x80) | |
369 | sram[SREG] |= SREG_C; | |
370 | if (((a & b & ~r) | (~a & ~b & r)) & 0x80) | |
371 | sram[SREG] |= SREG_V; | |
372 | if (!(sram[SREG] & SREG_N) ^ !(sram[SREG] & SREG_V)) | |
373 | sram[SREG] |= SREG_S; | |
374 | if (r == 0) | |
375 | sram[SREG] |= SREG_Z; | |
376 | } | |
377 | ||
378 | static void update_flags_sub (byte r, byte a, byte b) | |
379 | { | |
380 | byte carry; | |
381 | ||
382 | sram[SREG] &= ~(SREG_H | SREG_S | SREG_V | SREG_N | SREG_Z | SREG_C); | |
383 | if (r & 0x80) | |
384 | sram[SREG] |= SREG_N; | |
385 | carry = (~a & b) | (b & r) | (r & ~a); | |
386 | if (carry & 0x08) | |
387 | sram[SREG] |= SREG_H; | |
388 | if (carry & 0x80) | |
389 | sram[SREG] |= SREG_C; | |
390 | if (((a & ~b & ~r) | (~a & b & r)) & 0x80) | |
391 | sram[SREG] |= SREG_V; | |
392 | if (!(sram[SREG] & SREG_N) ^ !(sram[SREG] & SREG_V)) | |
393 | sram[SREG] |= SREG_S; | |
394 | /* Note: Z is not set. */ | |
395 | } | |
396 | ||
397 | static enum avr_opcode | |
398 | decode (unsigned int pc) | |
399 | { | |
400 | word op1 = flash[pc].op; | |
401 | ||
402 | switch ((op1 >> 12) & 0x0f) | |
403 | { | |
404 | case 0x0: | |
405 | switch ((op1 >> 10) & 0x3) | |
406 | { | |
407 | case 0x0: | |
408 | switch ((op1 >> 8) & 0x3) | |
409 | { | |
410 | case 0x0: | |
411 | if (op1 == 0) | |
412 | return OP_nop; | |
413 | break; | |
414 | case 0x1: | |
415 | return OP_movw; | |
416 | case 0x2: | |
417 | return OP_muls; | |
418 | case 0x3: | |
419 | if (op1 & 0x80) | |
420 | { | |
421 | if (op1 & 0x08) | |
422 | return OP_fmulsu; | |
423 | else | |
424 | return OP_fmuls; | |
425 | } | |
426 | else | |
427 | { | |
428 | if (op1 & 0x08) | |
429 | return OP_fmul; | |
430 | else | |
431 | return OP_mulsu; | |
432 | } | |
433 | } | |
434 | break; | |
435 | case 0x1: | |
436 | return OP_cpc; | |
437 | case 0x2: | |
438 | flash[pc].r = SREG_C; | |
439 | return OP_sbc; | |
440 | case 0x3: | |
441 | flash[pc].r = 0; | |
442 | return OP_add; | |
443 | } | |
444 | break; | |
445 | case 0x1: | |
446 | switch ((op1 >> 10) & 0x3) | |
447 | { | |
448 | case 0x0: | |
449 | return OP_cpse; | |
450 | case 0x1: | |
451 | return OP_cp; | |
452 | case 0x2: | |
453 | flash[pc].r = 0; | |
454 | return OP_sub; | |
455 | case 0x3: | |
456 | flash[pc].r = SREG_C; | |
457 | return OP_adc; | |
458 | } | |
459 | break; | |
460 | case 0x2: | |
461 | switch ((op1 >> 10) & 0x3) | |
462 | { | |
463 | case 0x0: | |
464 | return OP_and; | |
465 | case 0x1: | |
466 | return OP_eor; | |
467 | case 0x2: | |
468 | return OP_or; | |
469 | case 0x3: | |
470 | return OP_mov; | |
471 | } | |
472 | break; | |
473 | case 0x3: | |
474 | return OP_cpi; | |
475 | case 0x4: | |
476 | return OP_sbci; | |
477 | case 0x5: | |
478 | return OP_subi; | |
479 | case 0x6: | |
480 | return OP_ori; | |
481 | case 0x7: | |
482 | return OP_andi; | |
483 | case 0x8: | |
484 | case 0xa: | |
485 | if (op1 & 0x0200) | |
486 | { | |
487 | if (op1 & 0x0008) | |
488 | { | |
489 | flash[pc].r = get_q (op1); | |
490 | return OP_std_Y; | |
491 | } | |
492 | else | |
493 | { | |
494 | flash[pc].r = get_q (op1); | |
495 | return OP_std_Z; | |
496 | } | |
497 | } | |
498 | else | |
499 | { | |
500 | if (op1 & 0x0008) | |
501 | { | |
502 | flash[pc].r = get_q (op1); | |
503 | return OP_ldd_Y; | |
504 | } | |
505 | else | |
506 | { | |
507 | flash[pc].r = get_q (op1); | |
508 | return OP_ldd_Z; | |
509 | } | |
510 | } | |
511 | break; | |
512 | case 0x9: /* 9xxx */ | |
513 | switch ((op1 >> 8) & 0xf) | |
514 | { | |
515 | case 0x0: | |
516 | case 0x1: | |
517 | switch ((op1 >> 0) & 0xf) | |
518 | { | |
519 | case 0x0: | |
520 | return OP_lds; | |
521 | case 0x1: | |
522 | return OP_ld_Z_inc; | |
523 | case 0x2: | |
524 | return OP_ld_dec_Z; | |
525 | case 0x4: | |
526 | return OP_lpm_Z; | |
527 | case 0x5: | |
528 | return OP_lpm_inc_Z; | |
529 | case 0x6: | |
530 | return OP_elpm_Z; | |
531 | case 0x7: | |
532 | return OP_elpm_inc_Z; | |
533 | case 0x9: | |
534 | return OP_ld_Y_inc; | |
535 | case 0xa: | |
536 | return OP_ld_dec_Y; | |
537 | case 0xc: | |
538 | return OP_ld_X; | |
539 | case 0xd: | |
540 | return OP_ld_X_inc; | |
541 | case 0xe: | |
542 | return OP_ld_dec_X; | |
543 | case 0xf: | |
544 | return OP_pop; | |
545 | } | |
546 | break; | |
547 | case 0x2: | |
548 | case 0x3: | |
549 | switch ((op1 >> 0) & 0xf) | |
550 | { | |
551 | case 0x0: | |
552 | return OP_sts; | |
553 | case 0x1: | |
554 | return OP_st_Z_inc; | |
555 | case 0x2: | |
556 | return OP_st_dec_Z; | |
557 | case 0x9: | |
558 | return OP_st_Y_inc; | |
559 | case 0xa: | |
560 | return OP_st_dec_Y; | |
561 | case 0xc: | |
562 | return OP_st_X; | |
563 | case 0xd: | |
564 | return OP_st_X_inc; | |
565 | case 0xe: | |
566 | return OP_st_dec_X; | |
567 | case 0xf: | |
568 | return OP_push; | |
569 | } | |
570 | break; | |
571 | case 0x4: | |
572 | case 0x5: | |
573 | switch (op1 & 0xf) | |
574 | { | |
575 | case 0x0: | |
576 | return OP_com; | |
577 | case 0x1: | |
578 | return OP_neg; | |
579 | case 0x2: | |
580 | return OP_swap; | |
581 | case 0x3: | |
582 | return OP_inc; | |
583 | case 0x5: | |
584 | flash[pc].r = 0x80; | |
585 | return OP_asr; | |
586 | case 0x6: | |
587 | flash[pc].r = 0; | |
588 | return OP_lsr; | |
589 | case 0x7: | |
590 | return OP_ror; | |
591 | case 0x8: /* 9[45]x8 */ | |
592 | switch ((op1 >> 4) & 0x1f) | |
593 | { | |
594 | case 0x00: | |
595 | case 0x01: | |
596 | case 0x02: | |
597 | case 0x03: | |
598 | case 0x04: | |
599 | case 0x05: | |
600 | case 0x06: | |
601 | case 0x07: | |
602 | return OP_bset; | |
603 | case 0x08: | |
604 | case 0x09: | |
605 | case 0x0a: | |
606 | case 0x0b: | |
607 | case 0x0c: | |
608 | case 0x0d: | |
609 | case 0x0e: | |
610 | case 0x0f: | |
611 | return OP_bclr; | |
612 | case 0x10: | |
613 | return OP_ret; | |
614 | case 0x11: | |
615 | return OP_reti; | |
616 | case 0x19: | |
617 | return OP_break; | |
618 | case 0x1c: | |
619 | return OP_lpm; | |
620 | case 0x1d: | |
621 | return OP_elpm; | |
622 | default: | |
623 | break; | |
624 | } | |
625 | break; | |
626 | case 0x9: /* 9[45]x9 */ | |
627 | switch ((op1 >> 4) & 0x1f) | |
628 | { | |
629 | case 0x00: | |
630 | return OP_ijmp; | |
631 | case 0x01: | |
632 | return OP_eijmp; | |
633 | case 0x10: | |
634 | return OP_icall; | |
635 | case 0x11: | |
636 | return OP_eicall; | |
637 | default: | |
638 | break; | |
639 | } | |
640 | break; | |
641 | case 0xa: | |
642 | return OP_dec; | |
643 | case 0xc: | |
644 | case 0xd: | |
645 | flash[pc].r = ((op1 & 0x1f0) >> 3) | (op1 & 1); | |
646 | return OP_jmp; | |
647 | case 0xe: | |
648 | case 0xf: | |
649 | flash[pc].r = ((op1 & 0x1f0) >> 3) | (op1 & 1); | |
650 | return OP_call; | |
651 | } | |
652 | break; | |
653 | case 0x6: | |
654 | return OP_adiw; | |
655 | case 0x7: | |
656 | return OP_sbiw; | |
657 | case 0x8: | |
658 | return OP_cbi; | |
659 | case 0x9: | |
660 | return OP_sbic; | |
661 | case 0xa: | |
662 | return OP_sbi; | |
663 | case 0xb: | |
664 | return OP_sbis; | |
665 | case 0xc: | |
666 | case 0xd: | |
667 | case 0xe: | |
668 | case 0xf: | |
669 | return OP_mul; | |
670 | } | |
671 | break; | |
672 | case 0xb: | |
673 | flash[pc].r = get_A (op1); | |
674 | if (((op1 >> 11) & 1) == 0) | |
675 | return OP_in; | |
676 | else | |
677 | return OP_out; | |
678 | case 0xc: | |
679 | return OP_rjmp; | |
680 | case 0xd: | |
681 | return OP_rcall; | |
682 | case 0xe: | |
683 | return OP_ldi; | |
684 | case 0xf: | |
685 | switch ((op1 >> 9) & 7) | |
686 | { | |
687 | case 0: | |
688 | case 1: | |
689 | flash[pc].r = 1 << (op1 & 7); | |
690 | return OP_brbs; | |
691 | case 2: | |
692 | case 3: | |
693 | flash[pc].r = 1 << (op1 & 7); | |
694 | return OP_brbc; | |
695 | case 4: | |
696 | if ((op1 & 8) == 0) | |
697 | { | |
698 | flash[pc].r = 1 << (op1 & 7); | |
699 | return OP_bld; | |
700 | } | |
701 | break; | |
702 | case 5: | |
703 | if ((op1 & 8) == 0) | |
704 | { | |
705 | flash[pc].r = 1 << (op1 & 7); | |
706 | return OP_bst; | |
707 | } | |
708 | break; | |
709 | case 6: | |
710 | if ((op1 & 8) == 0) | |
711 | { | |
712 | flash[pc].r = 1 << (op1 & 7); | |
713 | return OP_sbrc; | |
714 | } | |
715 | break; | |
716 | case 7: | |
717 | if ((op1 & 8) == 0) | |
718 | { | |
719 | flash[pc].r = 1 << (op1 & 7); | |
720 | return OP_sbrs; | |
721 | } | |
722 | break; | |
723 | } | |
724 | } | |
df1756f4 | 725 | |
9943d318 | 726 | return OP_bad; |
df1756f4 TG |
727 | } |
728 | ||
729 | static void | |
82d442c6 | 730 | do_call (SIM_CPU *cpu, unsigned int npc) |
df1756f4 | 731 | { |
937af0fd | 732 | const struct avr_sim_state *state = AVR_SIM_STATE (CPU_STATE (cpu)); |
f246dc72 | 733 | struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu); |
df1756f4 TG |
734 | unsigned int sp = read_word (REG_SP); |
735 | ||
736 | /* Big endian! */ | |
f246dc72 MF |
737 | sram[sp--] = avr_cpu->pc; |
738 | sram[sp--] = avr_cpu->pc >> 8; | |
937af0fd | 739 | if (state->avr_pc22) |
df1756f4 | 740 | { |
f246dc72 MF |
741 | sram[sp--] = avr_cpu->pc >> 16; |
742 | avr_cpu->cycles++; | |
df1756f4 TG |
743 | } |
744 | write_word (REG_SP, sp); | |
f246dc72 MF |
745 | avr_cpu->pc = npc & PC_MASK; |
746 | avr_cpu->cycles += 3; | |
df1756f4 TG |
747 | } |
748 | ||
749 | static int | |
750 | get_insn_length (unsigned int p) | |
751 | { | |
752 | if (flash[p].code == OP_unknown) | |
753 | flash[p].code = decode(p); | |
754 | if (flash[p].code >= OP_2words) | |
755 | return 2; | |
756 | else | |
757 | return 1; | |
758 | } | |
759 | ||
760 | static unsigned int | |
761 | get_z (void) | |
762 | { | |
763 | return (sram[RAMPZ] << 16) | (sram[REGZ_HI] << 8) | sram[REGZ_LO]; | |
764 | } | |
765 | ||
766 | static unsigned char | |
767 | get_lpm (unsigned int addr) | |
768 | { | |
769 | word w; | |
770 | ||
771 | w = flash[(addr >> 1) & PC_MASK].op; | |
772 | if (addr & 1) | |
773 | w >>= 8; | |
774 | return w; | |
775 | } | |
776 | ||
777 | static void | |
82d442c6 | 778 | gen_mul (SIM_CPU *cpu, unsigned int res) |
df1756f4 | 779 | { |
f246dc72 MF |
780 | struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu); |
781 | ||
df1756f4 TG |
782 | write_word (0, res); |
783 | sram[SREG] &= ~(SREG_Z | SREG_C); | |
784 | if (res == 0) | |
785 | sram[SREG] |= SREG_Z; | |
786 | if (res & 0x8000) | |
787 | sram[SREG] |= SREG_C; | |
f246dc72 | 788 | avr_cpu->cycles++; |
df1756f4 TG |
789 | } |
790 | ||
9943d318 MF |
791 | static void |
792 | step_once (SIM_CPU *cpu) | |
df1756f4 | 793 | { |
f246dc72 | 794 | struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu); |
df1756f4 TG |
795 | unsigned int ipc; |
796 | ||
9943d318 MF |
797 | int code; |
798 | word op; | |
799 | byte res; | |
800 | byte r, d, vd; | |
df1756f4 | 801 | |
9943d318 | 802 | again: |
f246dc72 MF |
803 | code = flash[avr_cpu->pc].code; |
804 | op = flash[avr_cpu->pc].op; | |
df1756f4 | 805 | |
9943d318 MF |
806 | #if 0 |
807 | if (tracing && code != OP_unknown) | |
df1756f4 TG |
808 | { |
809 | if (verbose > 0) { | |
810 | int flags; | |
811 | int i; | |
9943d318 | 812 | |
df1756f4 TG |
813 | sim_cb_eprintf (callback, "R00-07:"); |
814 | for (i = 0; i < 8; i++) | |
815 | sim_cb_eprintf (callback, " %02x", sram[i]); | |
816 | sim_cb_eprintf (callback, " -"); | |
817 | for (i = 8; i < 16; i++) | |
818 | sim_cb_eprintf (callback, " %02x", sram[i]); | |
819 | sim_cb_eprintf (callback, " SP: %02x %02x", | |
820 | sram[REG_SP + 1], sram[REG_SP]); | |
821 | sim_cb_eprintf (callback, "\n"); | |
822 | sim_cb_eprintf (callback, "R16-31:"); | |
823 | for (i = 16; i < 24; i++) | |
824 | sim_cb_eprintf (callback, " %02x", sram[i]); | |
825 | sim_cb_eprintf (callback, " -"); | |
826 | for (i = 24; i < 32; i++) | |
827 | sim_cb_eprintf (callback, " %02x", sram[i]); | |
828 | sim_cb_eprintf (callback, " "); | |
829 | flags = sram[SREG]; | |
830 | for (i = 0; i < 8; i++) | |
831 | sim_cb_eprintf (callback, "%c", | |
832 | flags & (0x80 >> i) ? "ITHSVNZC"[i] : '-'); | |
833 | sim_cb_eprintf (callback, "\n"); | |
834 | } | |
835 | ||
9943d318 | 836 | if (!tracing) |
f246dc72 | 837 | sim_cb_eprintf (callback, "%06x: %04x\n", 2 * avr_cpu->pc, flash[avr_cpu->pc].op); |
df1756f4 TG |
838 | else |
839 | { | |
840 | sim_cb_eprintf (callback, "pc=0x%06x insn=0x%04x code=%d r=%d\n", | |
f246dc72 MF |
841 | 2 * avr_cpu->pc, flash[avr_cpu->pc].op, code, flash[avr_cpu->pc].r); |
842 | disassemble_insn (CPU_STATE (cpu), avr_cpu->pc); | |
df1756f4 TG |
843 | sim_cb_eprintf (callback, "\n"); |
844 | } | |
845 | } | |
9943d318 | 846 | #endif |
df1756f4 | 847 | |
f246dc72 MF |
848 | ipc = avr_cpu->pc; |
849 | avr_cpu->pc = (avr_cpu->pc + 1) & PC_MASK; | |
850 | avr_cpu->cycles++; | |
df1756f4 | 851 | |
9943d318 MF |
852 | switch (code) |
853 | { | |
854 | case OP_unknown: | |
855 | flash[ipc].code = decode(ipc); | |
f246dc72 MF |
856 | avr_cpu->pc = ipc; |
857 | avr_cpu->cycles--; | |
9943d318 MF |
858 | goto again; |
859 | ||
860 | case OP_nop: | |
861 | break; | |
862 | ||
863 | case OP_jmp: | |
864 | /* 2 words instruction, but we don't care about the pc. */ | |
f246dc72 MF |
865 | avr_cpu->pc = ((flash[ipc].r << 16) | flash[ipc + 1].op) & PC_MASK; |
866 | avr_cpu->cycles += 2; | |
9943d318 MF |
867 | break; |
868 | ||
869 | case OP_eijmp: | |
f246dc72 MF |
870 | avr_cpu->pc = ((sram[EIND] << 16) | read_word (REGZ)) & PC_MASK; |
871 | avr_cpu->cycles += 2; | |
9943d318 MF |
872 | break; |
873 | ||
874 | case OP_ijmp: | |
f246dc72 MF |
875 | avr_cpu->pc = read_word (REGZ) & PC_MASK; |
876 | avr_cpu->cycles += 1; | |
9943d318 MF |
877 | break; |
878 | ||
879 | case OP_call: | |
880 | /* 2 words instruction. */ | |
f246dc72 | 881 | avr_cpu->pc++; |
82d442c6 | 882 | do_call (cpu, (flash[ipc].r << 16) | flash[ipc + 1].op); |
9943d318 MF |
883 | break; |
884 | ||
885 | case OP_eicall: | |
82d442c6 | 886 | do_call (cpu, (sram[EIND] << 16) | read_word (REGZ)); |
9943d318 MF |
887 | break; |
888 | ||
889 | case OP_icall: | |
82d442c6 | 890 | do_call (cpu, read_word (REGZ)); |
9943d318 MF |
891 | break; |
892 | ||
893 | case OP_rcall: | |
f246dc72 | 894 | do_call (cpu, avr_cpu->pc + sign_ext (op & 0xfff, 12)); |
9943d318 MF |
895 | break; |
896 | ||
897 | case OP_reti: | |
898 | sram[SREG] |= SREG_I; | |
639bab3c | 899 | ATTRIBUTE_FALLTHROUGH; |
9943d318 | 900 | case OP_ret: |
df1756f4 | 901 | { |
937af0fd | 902 | const struct avr_sim_state *state = AVR_SIM_STATE (CPU_STATE (cpu)); |
9943d318 | 903 | unsigned int sp = read_word (REG_SP); |
937af0fd | 904 | if (state->avr_pc22) |
9943d318 | 905 | { |
f246dc72 MF |
906 | avr_cpu->pc = sram[++sp] << 16; |
907 | avr_cpu->cycles++; | |
9943d318 | 908 | } |
df1756f4 | 909 | else |
f246dc72 MF |
910 | avr_cpu->pc = 0; |
911 | avr_cpu->pc |= sram[++sp] << 8; | |
912 | avr_cpu->pc |= sram[++sp]; | |
9943d318 MF |
913 | write_word (REG_SP, sp); |
914 | } | |
f246dc72 | 915 | avr_cpu->cycles += 3; |
9943d318 MF |
916 | break; |
917 | ||
918 | case OP_break: | |
919 | /* Stop on this address. */ | |
59f48f5a | 920 | sim_engine_halt (CPU_STATE (cpu), cpu, NULL, ipc, sim_stopped, SIM_SIGTRAP); |
9943d318 MF |
921 | break; |
922 | ||
923 | case OP_bld: | |
924 | d = get_d (op); | |
925 | r = flash[ipc].r; | |
926 | if (sram[SREG] & SREG_T) | |
927 | sram[d] |= r; | |
928 | else | |
929 | sram[d] &= ~r; | |
930 | break; | |
931 | ||
932 | case OP_bst: | |
933 | if (sram[get_d (op)] & flash[ipc].r) | |
934 | sram[SREG] |= SREG_T; | |
935 | else | |
936 | sram[SREG] &= ~SREG_T; | |
937 | break; | |
938 | ||
939 | case OP_sbrc: | |
940 | case OP_sbrs: | |
941 | if (((sram[get_d (op)] & flash[ipc].r) == 0) ^ ((op & 0x0200) != 0)) | |
df1756f4 | 942 | { |
f246dc72 MF |
943 | int l = get_insn_length (avr_cpu->pc); |
944 | avr_cpu->pc += l; | |
945 | avr_cpu->cycles += l; | |
df1756f4 | 946 | } |
9943d318 | 947 | break; |
df1756f4 | 948 | |
9943d318 MF |
949 | case OP_push: |
950 | { | |
951 | unsigned int sp = read_word (REG_SP); | |
952 | sram[sp--] = sram[get_d (op)]; | |
953 | write_word (REG_SP, sp); | |
954 | } | |
f246dc72 | 955 | avr_cpu->cycles++; |
9943d318 | 956 | break; |
df1756f4 | 957 | |
9943d318 MF |
958 | case OP_pop: |
959 | { | |
960 | unsigned int sp = read_word (REG_SP); | |
961 | sram[get_d (op)] = sram[++sp]; | |
962 | write_word (REG_SP, sp); | |
963 | } | |
f246dc72 | 964 | avr_cpu->cycles++; |
9943d318 MF |
965 | break; |
966 | ||
967 | case OP_bclr: | |
968 | sram[SREG] &= ~(1 << ((op >> 4) & 0x7)); | |
969 | break; | |
970 | ||
971 | case OP_bset: | |
972 | sram[SREG] |= 1 << ((op >> 4) & 0x7); | |
973 | break; | |
974 | ||
975 | case OP_rjmp: | |
f246dc72 MF |
976 | avr_cpu->pc = (avr_cpu->pc + sign_ext (op & 0xfff, 12)) & PC_MASK; |
977 | avr_cpu->cycles++; | |
9943d318 MF |
978 | break; |
979 | ||
980 | case OP_eor: | |
981 | d = get_d (op); | |
982 | res = sram[d] ^ sram[get_r (op)]; | |
983 | sram[d] = res; | |
984 | update_flags_logic (res); | |
985 | break; | |
986 | ||
987 | case OP_and: | |
988 | d = get_d (op); | |
989 | res = sram[d] & sram[get_r (op)]; | |
990 | sram[d] = res; | |
991 | update_flags_logic (res); | |
992 | break; | |
993 | ||
994 | case OP_andi: | |
995 | d = get_d16 (op); | |
996 | res = sram[d] & get_K (op); | |
997 | sram[d] = res; | |
998 | update_flags_logic (res); | |
999 | break; | |
1000 | ||
1001 | case OP_or: | |
1002 | d = get_d (op); | |
1003 | res = sram[d] | sram[get_r (op)]; | |
1004 | sram[d] = res; | |
1005 | update_flags_logic (res); | |
1006 | break; | |
1007 | ||
1008 | case OP_ori: | |
1009 | d = get_d16 (op); | |
1010 | res = sram[d] | get_K (op); | |
1011 | sram[d] = res; | |
1012 | update_flags_logic (res); | |
1013 | break; | |
1014 | ||
1015 | case OP_com: | |
1016 | d = get_d (op); | |
1017 | res = ~sram[d]; | |
1018 | sram[d] = res; | |
1019 | update_flags_logic (res); | |
1020 | sram[SREG] |= SREG_C; | |
1021 | break; | |
1022 | ||
1023 | case OP_swap: | |
1024 | d = get_d (op); | |
1025 | vd = sram[d]; | |
1026 | sram[d] = (vd >> 4) | (vd << 4); | |
1027 | break; | |
1028 | ||
1029 | case OP_neg: | |
1030 | d = get_d (op); | |
1031 | vd = sram[d]; | |
1032 | res = -vd; | |
1033 | sram[d] = res; | |
1034 | sram[SREG] &= ~(SREG_H | SREG_S | SREG_V | SREG_N | SREG_Z | SREG_C); | |
1035 | if (res == 0) | |
1036 | sram[SREG] |= SREG_Z; | |
1037 | else | |
df1756f4 | 1038 | sram[SREG] |= SREG_C; |
9943d318 MF |
1039 | if (res == 0x80) |
1040 | sram[SREG] |= SREG_V | SREG_N; | |
1041 | else if (res & 0x80) | |
1042 | sram[SREG] |= SREG_N | SREG_S; | |
1043 | if ((res | vd) & 0x08) | |
1044 | sram[SREG] |= SREG_H; | |
1045 | break; | |
1046 | ||
1047 | case OP_inc: | |
1048 | d = get_d (op); | |
1049 | res = sram[d] + 1; | |
1050 | sram[d] = res; | |
1051 | sram[SREG] &= ~(SREG_S | SREG_V | SREG_N | SREG_Z); | |
1052 | if (res == 0x80) | |
1053 | sram[SREG] |= SREG_V | SREG_N; | |
1054 | else if (res & 0x80) | |
1055 | sram[SREG] |= SREG_N | SREG_S; | |
1056 | else if (res == 0) | |
1057 | sram[SREG] |= SREG_Z; | |
1058 | break; | |
1059 | ||
1060 | case OP_dec: | |
1061 | d = get_d (op); | |
1062 | res = sram[d] - 1; | |
1063 | sram[d] = res; | |
1064 | sram[SREG] &= ~(SREG_S | SREG_V | SREG_N | SREG_Z); | |
1065 | if (res == 0x7f) | |
1066 | sram[SREG] |= SREG_V | SREG_S; | |
1067 | else if (res & 0x80) | |
1068 | sram[SREG] |= SREG_N | SREG_S; | |
1069 | else if (res == 0) | |
1070 | sram[SREG] |= SREG_Z; | |
1071 | break; | |
1072 | ||
1073 | case OP_lsr: | |
1074 | case OP_asr: | |
1075 | d = get_d (op); | |
1076 | vd = sram[d]; | |
1077 | res = (vd >> 1) | (vd & flash[ipc].r); | |
1078 | sram[d] = res; | |
1079 | sram[SREG] &= ~(SREG_S | SREG_V | SREG_N | SREG_Z | SREG_C); | |
1080 | if (vd & 1) | |
1081 | sram[SREG] |= SREG_C | SREG_S; | |
1082 | if (res & 0x80) | |
1083 | sram[SREG] |= SREG_N; | |
1084 | if (!(sram[SREG] & SREG_N) ^ !(sram[SREG] & SREG_C)) | |
1085 | sram[SREG] |= SREG_V; | |
1086 | if (res == 0) | |
1087 | sram[SREG] |= SREG_Z; | |
1088 | break; | |
1089 | ||
1090 | case OP_ror: | |
1091 | d = get_d (op); | |
1092 | vd = sram[d]; | |
1093 | res = vd >> 1 | (sram[SREG] << 7); | |
1094 | sram[d] = res; | |
1095 | sram[SREG] &= ~(SREG_S | SREG_V | SREG_N | SREG_Z | SREG_C); | |
1096 | if (vd & 1) | |
1097 | sram[SREG] |= SREG_C | SREG_S; | |
1098 | if (res & 0x80) | |
1099 | sram[SREG] |= SREG_N; | |
1100 | if (!(sram[SREG] & SREG_N) ^ !(sram[SREG] & SREG_C)) | |
1101 | sram[SREG] |= SREG_V; | |
1102 | if (res == 0) | |
1103 | sram[SREG] |= SREG_Z; | |
1104 | break; | |
1105 | ||
1106 | case OP_mul: | |
82d442c6 | 1107 | gen_mul (cpu, (word)sram[get_r (op)] * (word)sram[get_d (op)]); |
9943d318 MF |
1108 | break; |
1109 | ||
1110 | case OP_muls: | |
82d442c6 MF |
1111 | gen_mul (cpu, (sword)(sbyte)sram[get_r16 (op)] |
1112 | * (sword)(sbyte)sram[get_d16 (op)]); | |
9943d318 MF |
1113 | break; |
1114 | ||
1115 | case OP_mulsu: | |
82d442c6 MF |
1116 | gen_mul (cpu, (sword)(word)sram[get_r16_23 (op)] |
1117 | * (sword)(sbyte)sram[get_d16_23 (op)]); | |
9943d318 MF |
1118 | break; |
1119 | ||
1120 | case OP_fmul: | |
82d442c6 MF |
1121 | gen_mul (cpu, ((word)sram[get_r16_23 (op)] |
1122 | * (word)sram[get_d16_23 (op)]) << 1); | |
9943d318 MF |
1123 | break; |
1124 | ||
1125 | case OP_fmuls: | |
82d442c6 MF |
1126 | gen_mul (cpu, ((sword)(sbyte)sram[get_r16_23 (op)] |
1127 | * (sword)(sbyte)sram[get_d16_23 (op)]) << 1); | |
9943d318 MF |
1128 | break; |
1129 | ||
1130 | case OP_fmulsu: | |
82d442c6 MF |
1131 | gen_mul (cpu, ((sword)(word)sram[get_r16_23 (op)] |
1132 | * (sword)(sbyte)sram[get_d16_23 (op)]) << 1); | |
9943d318 MF |
1133 | break; |
1134 | ||
1135 | case OP_adc: | |
1136 | case OP_add: | |
1137 | r = sram[get_r (op)]; | |
1138 | d = get_d (op); | |
1139 | vd = sram[d]; | |
1140 | res = r + vd + (sram[SREG] & flash[ipc].r); | |
1141 | sram[d] = res; | |
1142 | update_flags_add (res, vd, r); | |
1143 | break; | |
1144 | ||
1145 | case OP_sub: | |
1146 | d = get_d (op); | |
1147 | vd = sram[d]; | |
1148 | r = sram[get_r (op)]; | |
1149 | res = vd - r; | |
1150 | sram[d] = res; | |
1151 | update_flags_sub (res, vd, r); | |
1152 | if (res == 0) | |
1153 | sram[SREG] |= SREG_Z; | |
1154 | break; | |
1155 | ||
1156 | case OP_sbc: | |
1157 | { | |
1158 | byte old = sram[SREG]; | |
df1756f4 TG |
1159 | d = get_d (op); |
1160 | vd = sram[d]; | |
1161 | r = sram[get_r (op)]; | |
9943d318 | 1162 | res = vd - r - (old & SREG_C); |
df1756f4 TG |
1163 | sram[d] = res; |
1164 | update_flags_sub (res, vd, r); | |
9943d318 | 1165 | if (res == 0 && (old & SREG_Z)) |
df1756f4 | 1166 | sram[SREG] |= SREG_Z; |
9943d318 MF |
1167 | } |
1168 | break; | |
1169 | ||
1170 | case OP_subi: | |
1171 | d = get_d16 (op); | |
1172 | vd = sram[d]; | |
1173 | r = get_K (op); | |
1174 | res = vd - r; | |
1175 | sram[d] = res; | |
1176 | update_flags_sub (res, vd, r); | |
1177 | if (res == 0) | |
1178 | sram[SREG] |= SREG_Z; | |
1179 | break; | |
1180 | ||
1181 | case OP_sbci: | |
1182 | { | |
1183 | byte old = sram[SREG]; | |
df1756f4 | 1184 | |
df1756f4 TG |
1185 | d = get_d16 (op); |
1186 | vd = sram[d]; | |
1187 | r = get_K (op); | |
9943d318 | 1188 | res = vd - r - (old & SREG_C); |
df1756f4 TG |
1189 | sram[d] = res; |
1190 | update_flags_sub (res, vd, r); | |
9943d318 | 1191 | if (res == 0 && (old & SREG_Z)) |
df1756f4 | 1192 | sram[SREG] |= SREG_Z; |
9943d318 MF |
1193 | } |
1194 | break; | |
1195 | ||
1196 | case OP_mov: | |
1197 | sram[get_d (op)] = sram[get_r (op)]; | |
1198 | break; | |
1199 | ||
1200 | case OP_movw: | |
1201 | d = (op & 0xf0) >> 3; | |
1202 | r = (op & 0x0f) << 1; | |
1203 | sram[d] = sram[r]; | |
1204 | sram[d + 1] = sram[r + 1]; | |
1205 | break; | |
1206 | ||
1207 | case OP_out: | |
1208 | d = get_A (op) + 0x20; | |
1209 | res = sram[get_d (op)]; | |
1210 | sram[d] = res; | |
1211 | if (d == STDIO_PORT) | |
1212 | putchar (res); | |
1213 | else if (d == EXIT_PORT) | |
f246dc72 | 1214 | sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_exited, 0); |
9943d318 | 1215 | else if (d == ABORT_PORT) |
f246dc72 | 1216 | sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_exited, 1); |
9943d318 MF |
1217 | break; |
1218 | ||
1219 | case OP_in: | |
1220 | d = get_A (op) + 0x20; | |
1221 | sram[get_d (op)] = sram[d]; | |
1222 | break; | |
1223 | ||
1224 | case OP_cbi: | |
1225 | d = get_biA (op) + 0x20; | |
1226 | sram[d] &= ~(1 << get_b(op)); | |
1227 | break; | |
1228 | ||
1229 | case OP_sbi: | |
1230 | d = get_biA (op) + 0x20; | |
1231 | sram[d] |= 1 << get_b(op); | |
1232 | break; | |
1233 | ||
1234 | case OP_sbic: | |
1235 | if (!(sram[get_biA (op) + 0x20] & 1 << get_b(op))) | |
df1756f4 | 1236 | { |
f246dc72 MF |
1237 | int l = get_insn_length (avr_cpu->pc); |
1238 | avr_cpu->pc += l; | |
1239 | avr_cpu->cycles += l; | |
df1756f4 | 1240 | } |
9943d318 | 1241 | break; |
df1756f4 | 1242 | |
9943d318 MF |
1243 | case OP_sbis: |
1244 | if (sram[get_biA (op) + 0x20] & 1 << get_b(op)) | |
1245 | { | |
f246dc72 MF |
1246 | int l = get_insn_length (avr_cpu->pc); |
1247 | avr_cpu->pc += l; | |
1248 | avr_cpu->cycles += l; | |
9943d318 MF |
1249 | } |
1250 | break; | |
1251 | ||
1252 | case OP_ldi: | |
1253 | res = get_K (op); | |
1254 | d = get_d16 (op); | |
1255 | sram[d] = res; | |
1256 | break; | |
1257 | ||
1258 | case OP_lds: | |
f246dc72 MF |
1259 | sram[get_d (op)] = sram[flash[avr_cpu->pc].op]; |
1260 | avr_cpu->pc++; | |
1261 | avr_cpu->cycles++; | |
9943d318 MF |
1262 | break; |
1263 | ||
1264 | case OP_sts: | |
f246dc72 MF |
1265 | sram[flash[avr_cpu->pc].op] = sram[get_d (op)]; |
1266 | avr_cpu->pc++; | |
1267 | avr_cpu->cycles++; | |
9943d318 MF |
1268 | break; |
1269 | ||
1270 | case OP_cpse: | |
1271 | if (sram[get_r (op)] == sram[get_d (op)]) | |
1272 | { | |
f246dc72 MF |
1273 | int l = get_insn_length (avr_cpu->pc); |
1274 | avr_cpu->pc += l; | |
1275 | avr_cpu->cycles += l; | |
9943d318 MF |
1276 | } |
1277 | break; | |
1278 | ||
1279 | case OP_cp: | |
1280 | r = sram[get_r (op)]; | |
1281 | d = sram[get_d (op)]; | |
1282 | res = d - r; | |
1283 | update_flags_sub (res, d, r); | |
1284 | if (res == 0) | |
1285 | sram[SREG] |= SREG_Z; | |
1286 | break; | |
1287 | ||
1288 | case OP_cpi: | |
1289 | r = get_K (op); | |
1290 | d = sram[get_d16 (op)]; | |
1291 | res = d - r; | |
1292 | update_flags_sub (res, d, r); | |
1293 | if (res == 0) | |
1294 | sram[SREG] |= SREG_Z; | |
1295 | break; | |
1296 | ||
1297 | case OP_cpc: | |
1298 | { | |
1299 | byte old = sram[SREG]; | |
df1756f4 | 1300 | d = sram[get_d (op)]; |
9943d318 MF |
1301 | r = sram[get_r (op)]; |
1302 | res = d - r - (old & SREG_C); | |
df1756f4 | 1303 | update_flags_sub (res, d, r); |
9943d318 | 1304 | if (res == 0 && (old & SREG_Z)) |
df1756f4 | 1305 | sram[SREG] |= SREG_Z; |
9943d318 MF |
1306 | } |
1307 | break; | |
df1756f4 | 1308 | |
9943d318 MF |
1309 | case OP_brbc: |
1310 | if (!(sram[SREG] & flash[ipc].r)) | |
1311 | { | |
f246dc72 MF |
1312 | avr_cpu->pc = (avr_cpu->pc + get_k (op)) & PC_MASK; |
1313 | avr_cpu->cycles++; | |
9943d318 MF |
1314 | } |
1315 | break; | |
df1756f4 | 1316 | |
9943d318 MF |
1317 | case OP_brbs: |
1318 | if (sram[SREG] & flash[ipc].r) | |
df1756f4 | 1319 | { |
f246dc72 MF |
1320 | avr_cpu->pc = (avr_cpu->pc + get_k (op)) & PC_MASK; |
1321 | avr_cpu->cycles++; | |
df1756f4 | 1322 | } |
9943d318 MF |
1323 | break; |
1324 | ||
1325 | case OP_lpm: | |
1326 | sram[0] = get_lpm (read_word (REGZ)); | |
f246dc72 | 1327 | avr_cpu->cycles += 2; |
9943d318 MF |
1328 | break; |
1329 | ||
1330 | case OP_lpm_Z: | |
1331 | sram[get_d (op)] = get_lpm (read_word (REGZ)); | |
f246dc72 | 1332 | avr_cpu->cycles += 2; |
9943d318 MF |
1333 | break; |
1334 | ||
1335 | case OP_lpm_inc_Z: | |
1336 | sram[get_d (op)] = get_lpm (read_word_post_inc (REGZ)); | |
f246dc72 | 1337 | avr_cpu->cycles += 2; |
9943d318 MF |
1338 | break; |
1339 | ||
1340 | case OP_elpm: | |
1341 | sram[0] = get_lpm (get_z ()); | |
f246dc72 | 1342 | avr_cpu->cycles += 2; |
9943d318 MF |
1343 | break; |
1344 | ||
1345 | case OP_elpm_Z: | |
1346 | sram[get_d (op)] = get_lpm (get_z ()); | |
f246dc72 | 1347 | avr_cpu->cycles += 2; |
9943d318 MF |
1348 | break; |
1349 | ||
1350 | case OP_elpm_inc_Z: | |
1351 | { | |
1352 | unsigned int z = get_z (); | |
df1756f4 | 1353 | |
9943d318 MF |
1354 | sram[get_d (op)] = get_lpm (z); |
1355 | z++; | |
1356 | sram[REGZ_LO] = z; | |
1357 | sram[REGZ_HI] = z >> 8; | |
1358 | sram[RAMPZ] = z >> 16; | |
1359 | } | |
f246dc72 | 1360 | avr_cpu->cycles += 2; |
9943d318 MF |
1361 | break; |
1362 | ||
1363 | case OP_ld_Z_inc: | |
1364 | sram[get_d (op)] = sram[read_word_post_inc (REGZ) & SRAM_MASK]; | |
f246dc72 | 1365 | avr_cpu->cycles++; |
9943d318 MF |
1366 | break; |
1367 | ||
1368 | case OP_ld_dec_Z: | |
1369 | sram[get_d (op)] = sram[read_word_pre_dec (REGZ) & SRAM_MASK]; | |
f246dc72 | 1370 | avr_cpu->cycles++; |
9943d318 MF |
1371 | break; |
1372 | ||
1373 | case OP_ld_X_inc: | |
1374 | sram[get_d (op)] = sram[read_word_post_inc (REGX) & SRAM_MASK]; | |
f246dc72 | 1375 | avr_cpu->cycles++; |
9943d318 MF |
1376 | break; |
1377 | ||
1378 | case OP_ld_dec_X: | |
1379 | sram[get_d (op)] = sram[read_word_pre_dec (REGX) & SRAM_MASK]; | |
f246dc72 | 1380 | avr_cpu->cycles++; |
9943d318 MF |
1381 | break; |
1382 | ||
1383 | case OP_ld_Y_inc: | |
1384 | sram[get_d (op)] = sram[read_word_post_inc (REGY) & SRAM_MASK]; | |
f246dc72 | 1385 | avr_cpu->cycles++; |
9943d318 MF |
1386 | break; |
1387 | ||
1388 | case OP_ld_dec_Y: | |
1389 | sram[get_d (op)] = sram[read_word_pre_dec (REGY) & SRAM_MASK]; | |
f246dc72 | 1390 | avr_cpu->cycles++; |
9943d318 MF |
1391 | break; |
1392 | ||
1393 | case OP_st_X: | |
1394 | sram[read_word (REGX) & SRAM_MASK] = sram[get_d (op)]; | |
f246dc72 | 1395 | avr_cpu->cycles++; |
9943d318 MF |
1396 | break; |
1397 | ||
1398 | case OP_st_X_inc: | |
1399 | sram[read_word_post_inc (REGX) & SRAM_MASK] = sram[get_d (op)]; | |
f246dc72 | 1400 | avr_cpu->cycles++; |
9943d318 MF |
1401 | break; |
1402 | ||
1403 | case OP_st_dec_X: | |
1404 | sram[read_word_pre_dec (REGX) & SRAM_MASK] = sram[get_d (op)]; | |
f246dc72 | 1405 | avr_cpu->cycles++; |
9943d318 MF |
1406 | break; |
1407 | ||
1408 | case OP_st_Z_inc: | |
1409 | sram[read_word_post_inc (REGZ) & SRAM_MASK] = sram[get_d (op)]; | |
f246dc72 | 1410 | avr_cpu->cycles++; |
9943d318 MF |
1411 | break; |
1412 | ||
1413 | case OP_st_dec_Z: | |
1414 | sram[read_word_pre_dec (REGZ) & SRAM_MASK] = sram[get_d (op)]; | |
f246dc72 | 1415 | avr_cpu->cycles++; |
9943d318 MF |
1416 | break; |
1417 | ||
1418 | case OP_st_Y_inc: | |
1419 | sram[read_word_post_inc (REGY) & SRAM_MASK] = sram[get_d (op)]; | |
f246dc72 | 1420 | avr_cpu->cycles++; |
9943d318 MF |
1421 | break; |
1422 | ||
1423 | case OP_st_dec_Y: | |
1424 | sram[read_word_pre_dec (REGY) & SRAM_MASK] = sram[get_d (op)]; | |
f246dc72 | 1425 | avr_cpu->cycles++; |
9943d318 MF |
1426 | break; |
1427 | ||
1428 | case OP_std_Y: | |
1429 | sram[read_word (REGY) + flash[ipc].r] = sram[get_d (op)]; | |
f246dc72 | 1430 | avr_cpu->cycles++; |
9943d318 MF |
1431 | break; |
1432 | ||
1433 | case OP_std_Z: | |
1434 | sram[read_word (REGZ) + flash[ipc].r] = sram[get_d (op)]; | |
f246dc72 | 1435 | avr_cpu->cycles++; |
9943d318 MF |
1436 | break; |
1437 | ||
1438 | case OP_ldd_Z: | |
1439 | sram[get_d (op)] = sram[read_word (REGZ) + flash[ipc].r]; | |
f246dc72 | 1440 | avr_cpu->cycles++; |
9943d318 MF |
1441 | break; |
1442 | ||
1443 | case OP_ldd_Y: | |
1444 | sram[get_d (op)] = sram[read_word (REGY) + flash[ipc].r]; | |
f246dc72 | 1445 | avr_cpu->cycles++; |
9943d318 MF |
1446 | break; |
1447 | ||
1448 | case OP_ld_X: | |
1449 | sram[get_d (op)] = sram[read_word (REGX) & SRAM_MASK]; | |
f246dc72 | 1450 | avr_cpu->cycles++; |
9943d318 MF |
1451 | break; |
1452 | ||
1453 | case OP_sbiw: | |
1454 | { | |
1455 | word wk = get_k6 (op); | |
1456 | word wres; | |
1457 | word wr; | |
df1756f4 | 1458 | |
9943d318 MF |
1459 | d = get_d24 (op); |
1460 | wr = read_word (d); | |
1461 | wres = wr - wk; | |
df1756f4 | 1462 | |
9943d318 MF |
1463 | sram[SREG] &= ~(SREG_S | SREG_V | SREG_N | SREG_Z | SREG_C); |
1464 | if (wres == 0) | |
1465 | sram[SREG] |= SREG_Z; | |
1466 | if (wres & 0x8000) | |
1467 | sram[SREG] |= SREG_N; | |
1468 | if (wres & ~wr & 0x8000) | |
1469 | sram[SREG] |= SREG_C; | |
1470 | if (~wres & wr & 0x8000) | |
1471 | sram[SREG] |= SREG_V; | |
1472 | if (((~wres & wr) ^ wres) & 0x8000) | |
1473 | sram[SREG] |= SREG_S; | |
1474 | write_word (d, wres); | |
1475 | } | |
f246dc72 | 1476 | avr_cpu->cycles++; |
9943d318 | 1477 | break; |
df1756f4 | 1478 | |
9943d318 MF |
1479 | case OP_adiw: |
1480 | { | |
1481 | word wk = get_k6 (op); | |
1482 | word wres; | |
1483 | word wr; | |
1484 | ||
1485 | d = get_d24 (op); | |
1486 | wr = read_word (d); | |
1487 | wres = wr + wk; | |
1488 | ||
1489 | sram[SREG] &= ~(SREG_S | SREG_V | SREG_N | SREG_Z | SREG_C); | |
1490 | if (wres == 0) | |
1491 | sram[SREG] |= SREG_Z; | |
1492 | if (wres & 0x8000) | |
1493 | sram[SREG] |= SREG_N; | |
1494 | if (~wres & wr & 0x8000) | |
1495 | sram[SREG] |= SREG_C; | |
1496 | if (wres & ~wr & 0x8000) | |
1497 | sram[SREG] |= SREG_V; | |
1498 | if (((wres & ~wr) ^ wres) & 0x8000) | |
1499 | sram[SREG] |= SREG_S; | |
1500 | write_word (d, wres); | |
df1756f4 | 1501 | } |
f246dc72 | 1502 | avr_cpu->cycles++; |
9943d318 | 1503 | break; |
df1756f4 | 1504 | |
9943d318 | 1505 | case OP_bad: |
f246dc72 | 1506 | sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_signalled, SIM_SIGILL); |
df1756f4 | 1507 | |
9943d318 | 1508 | default: |
f246dc72 | 1509 | sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_signalled, SIM_SIGILL); |
9943d318 MF |
1510 | } |
1511 | } | |
1512 | ||
1513 | void | |
1514 | sim_engine_run (SIM_DESC sd, | |
1515 | int next_cpu_nr, /* ignore */ | |
1516 | int nr_cpus, /* ignore */ | |
1517 | int siggnal) /* ignore */ | |
df1756f4 | 1518 | { |
9943d318 MF |
1519 | SIM_CPU *cpu; |
1520 | ||
1521 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
1522 | ||
1523 | cpu = STATE_CPU (sd, 0); | |
df1756f4 | 1524 | |
9943d318 MF |
1525 | while (1) |
1526 | { | |
1527 | step_once (cpu); | |
1528 | if (sim_events_tick (sd)) | |
1529 | sim_events_process (sd); | |
1530 | } | |
df1756f4 TG |
1531 | } |
1532 | ||
63fd5b5d MF |
1533 | uint64_t |
1534 | sim_write (SIM_DESC sd, uint64_t addr, const void *buffer, uint64_t size) | |
df1756f4 TG |
1535 | { |
1536 | int osize = size; | |
1537 | ||
1538 | if (addr >= 0 && addr < SRAM_VADDR) | |
1539 | { | |
5b94c380 | 1540 | const unsigned char *data = buffer; |
8f0ac700 | 1541 | while (size > 0 && addr < (MAX_AVR_FLASH << 1)) |
df1756f4 | 1542 | { |
8f0ac700 TG |
1543 | word val = flash[addr >> 1].op; |
1544 | ||
1545 | if (addr & 1) | |
5b94c380 | 1546 | val = (val & 0xff) | (data[0] << 8); |
8f0ac700 | 1547 | else |
5b94c380 | 1548 | val = (val & 0xff00) | data[0]; |
8f0ac700 TG |
1549 | |
1550 | flash[addr >> 1].op = val; | |
1551 | flash[addr >> 1].code = OP_unknown; | |
df1756f4 | 1552 | addr++; |
5b94c380 | 1553 | data++; |
8f0ac700 | 1554 | size--; |
df1756f4 TG |
1555 | } |
1556 | return osize - size; | |
1557 | } | |
1558 | else if (addr >= SRAM_VADDR && addr < SRAM_VADDR + MAX_AVR_SRAM) | |
1559 | { | |
1560 | addr -= SRAM_VADDR; | |
1561 | if (addr + size > MAX_AVR_SRAM) | |
1562 | size = MAX_AVR_SRAM - addr; | |
1563 | memcpy (sram + addr, buffer, size); | |
1564 | return size; | |
1565 | } | |
1566 | else | |
1567 | return 0; | |
1568 | } | |
1569 | ||
63fd5b5d MF |
1570 | uint64_t |
1571 | sim_read (SIM_DESC sd, uint64_t addr, void *buffer, uint64_t size) | |
df1756f4 TG |
1572 | { |
1573 | int osize = size; | |
1574 | ||
1575 | if (addr >= 0 && addr < SRAM_VADDR) | |
1576 | { | |
5b94c380 | 1577 | unsigned char *data = buffer; |
8f0ac700 | 1578 | while (size > 0 && addr < (MAX_AVR_FLASH << 1)) |
df1756f4 | 1579 | { |
8f0ac700 TG |
1580 | word val = flash[addr >> 1].op; |
1581 | ||
1582 | if (addr & 1) | |
1583 | val >>= 8; | |
1584 | ||
5b94c380 | 1585 | *data++ = val; |
df1756f4 | 1586 | addr++; |
8f0ac700 | 1587 | size--; |
df1756f4 TG |
1588 | } |
1589 | return osize - size; | |
1590 | } | |
1591 | else if (addr >= SRAM_VADDR && addr < SRAM_VADDR + MAX_AVR_SRAM) | |
1592 | { | |
1593 | addr -= SRAM_VADDR; | |
1594 | if (addr + size > MAX_AVR_SRAM) | |
1595 | size = MAX_AVR_SRAM - addr; | |
1596 | memcpy (buffer, sram + addr, size); | |
1597 | return size; | |
1598 | } | |
1599 | else | |
1600 | { | |
1601 | /* Avoid errors. */ | |
1602 | memset (buffer, 0, size); | |
1603 | return size; | |
1604 | } | |
1605 | } | |
1606 | ||
807eaf04 | 1607 | static int |
ee1cffd3 | 1608 | avr_reg_store (SIM_CPU *cpu, int rn, const void *buf, int length) |
df1756f4 | 1609 | { |
f246dc72 | 1610 | struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu); |
ee1cffd3 MF |
1611 | const unsigned char *memory = buf; |
1612 | ||
df1756f4 TG |
1613 | if (rn < 32 && length == 1) |
1614 | { | |
1615 | sram[rn] = *memory; | |
1616 | return 1; | |
1617 | } | |
1618 | if (rn == AVR_SREG_REGNUM && length == 1) | |
1619 | { | |
1620 | sram[SREG] = *memory; | |
1621 | return 1; | |
1622 | } | |
1623 | if (rn == AVR_SP_REGNUM && length == 2) | |
1624 | { | |
1625 | sram[REG_SP] = memory[0]; | |
1626 | sram[REG_SP + 1] = memory[1]; | |
1627 | return 2; | |
1628 | } | |
1629 | if (rn == AVR_PC_REGNUM && length == 4) | |
1630 | { | |
f246dc72 | 1631 | avr_cpu->pc = (memory[0] >> 1) | (memory[1] << 7) |
82d442c6 | 1632 | | (memory[2] << 15) | (memory[3] << 23); |
f246dc72 | 1633 | avr_cpu->pc &= PC_MASK; |
df1756f4 TG |
1634 | return 4; |
1635 | } | |
1636 | return 0; | |
1637 | } | |
1638 | ||
807eaf04 | 1639 | static int |
ee1cffd3 | 1640 | avr_reg_fetch (SIM_CPU *cpu, int rn, void *buf, int length) |
df1756f4 | 1641 | { |
f246dc72 | 1642 | struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu); |
ee1cffd3 MF |
1643 | unsigned char *memory = buf; |
1644 | ||
df1756f4 TG |
1645 | if (rn < 32 && length == 1) |
1646 | { | |
1647 | *memory = sram[rn]; | |
1648 | return 1; | |
1649 | } | |
1650 | if (rn == AVR_SREG_REGNUM && length == 1) | |
1651 | { | |
1652 | *memory = sram[SREG]; | |
1653 | return 1; | |
1654 | } | |
1655 | if (rn == AVR_SP_REGNUM && length == 2) | |
1656 | { | |
1657 | memory[0] = sram[REG_SP]; | |
1658 | memory[1] = sram[REG_SP + 1]; | |
1659 | return 2; | |
1660 | } | |
1661 | if (rn == AVR_PC_REGNUM && length == 4) | |
1662 | { | |
f246dc72 MF |
1663 | memory[0] = avr_cpu->pc << 1; |
1664 | memory[1] = avr_cpu->pc >> 7; | |
1665 | memory[2] = avr_cpu->pc >> 15; | |
1666 | memory[3] = avr_cpu->pc >> 23; | |
df1756f4 TG |
1667 | return 4; |
1668 | } | |
1669 | return 0; | |
1670 | } | |
1671 | ||
4c0cab1e MF |
1672 | static sim_cia |
1673 | avr_pc_get (sim_cpu *cpu) | |
1674 | { | |
f246dc72 | 1675 | return AVR_SIM_CPU (cpu)->pc; |
4c0cab1e MF |
1676 | } |
1677 | ||
1678 | static void | |
82d442c6 | 1679 | avr_pc_set (sim_cpu *cpu, sim_cia pc) |
4c0cab1e | 1680 | { |
f246dc72 | 1681 | AVR_SIM_CPU (cpu)->pc = pc; |
4c0cab1e MF |
1682 | } |
1683 | ||
9943d318 MF |
1684 | static void |
1685 | free_state (SIM_DESC sd) | |
df1756f4 | 1686 | { |
9943d318 MF |
1687 | if (STATE_MODULES (sd) != NULL) |
1688 | sim_module_uninstall (sd); | |
1689 | sim_cpu_free_all (sd); | |
1690 | sim_state_free (sd); | |
df1756f4 TG |
1691 | } |
1692 | ||
1693 | SIM_DESC | |
2e3d4f4d MF |
1694 | sim_open (SIM_OPEN_KIND kind, host_callback *cb, |
1695 | struct bfd *abfd, char * const *argv) | |
df1756f4 | 1696 | { |
4c0cab1e | 1697 | int i; |
937af0fd | 1698 | SIM_DESC sd = sim_state_alloc_extra (kind, cb, sizeof (struct avr_sim_state)); |
9943d318 | 1699 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); |
df1756f4 | 1700 | |
ba307cdd MF |
1701 | /* Set default options before parsing user options. */ |
1702 | current_alignment = STRICT_ALIGNMENT; | |
f9a4d543 | 1703 | current_target_byte_order = BFD_ENDIAN_LITTLE; |
ba307cdd | 1704 | |
9943d318 | 1705 | /* The cpu data is kept in a separately allocated chunk of memory. */ |
883be197 | 1706 | if (sim_cpu_alloc_all_extra (sd, 0, sizeof (struct avr_sim_cpu)) |
f246dc72 | 1707 | != SIM_RC_OK) |
9943d318 MF |
1708 | { |
1709 | free_state (sd); | |
1710 | return 0; | |
1711 | } | |
df1756f4 | 1712 | |
9943d318 MF |
1713 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) |
1714 | { | |
1715 | free_state (sd); | |
1716 | return 0; | |
1717 | } | |
df1756f4 | 1718 | |
77cf2ef5 | 1719 | /* The parser will print an error message for us, so we silently return. */ |
9943d318 MF |
1720 | if (sim_parse_args (sd, argv) != SIM_RC_OK) |
1721 | { | |
1722 | free_state (sd); | |
1723 | return 0; | |
1724 | } | |
33bcfade | 1725 | |
9943d318 | 1726 | /* Check for/establish the a reference program image. */ |
e8f20a28 | 1727 | if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK) |
9943d318 MF |
1728 | { |
1729 | free_state (sd); | |
1730 | return 0; | |
1731 | } | |
df1756f4 | 1732 | |
9943d318 MF |
1733 | /* Configure/verify the target byte order and other runtime |
1734 | configuration options. */ | |
1735 | if (sim_config (sd) != SIM_RC_OK) | |
1736 | { | |
1737 | sim_module_uninstall (sd); | |
1738 | return 0; | |
1739 | } | |
df1756f4 | 1740 | |
9943d318 MF |
1741 | if (sim_post_argv_init (sd) != SIM_RC_OK) |
1742 | { | |
1743 | /* Uninstall the modules to avoid memory leaks, | |
1744 | file descriptor leaks, etc. */ | |
1745 | sim_module_uninstall (sd); | |
1746 | return 0; | |
1747 | } | |
df1756f4 | 1748 | |
4c0cab1e MF |
1749 | /* CPU specific initialization. */ |
1750 | for (i = 0; i < MAX_NR_PROCESSORS; ++i) | |
1751 | { | |
1752 | SIM_CPU *cpu = STATE_CPU (sd, i); | |
1753 | ||
807eaf04 MF |
1754 | CPU_REG_FETCH (cpu) = avr_reg_fetch; |
1755 | CPU_REG_STORE (cpu) = avr_reg_store; | |
4c0cab1e MF |
1756 | CPU_PC_FETCH (cpu) = avr_pc_get; |
1757 | CPU_PC_STORE (cpu) = avr_pc_set; | |
1758 | } | |
1759 | ||
9943d318 MF |
1760 | /* Clear all the memory. */ |
1761 | memset (sram, 0, sizeof (sram)); | |
1762 | memset (flash, 0, sizeof (flash)); | |
df1756f4 | 1763 | |
9943d318 | 1764 | return sd; |
df1756f4 TG |
1765 | } |
1766 | ||
9943d318 | 1767 | SIM_RC |
2e3d4f4d MF |
1768 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, |
1769 | char * const *argv, char * const *env) | |
df1756f4 | 1770 | { |
937af0fd | 1771 | struct avr_sim_state *state = AVR_SIM_STATE (sd); |
82d442c6 | 1772 | SIM_CPU *cpu = STATE_CPU (sd, 0); |
20fea663 | 1773 | bfd_vma addr; |
82d442c6 | 1774 | |
9943d318 MF |
1775 | /* Set the PC. */ |
1776 | if (abfd != NULL) | |
82d442c6 | 1777 | addr = bfd_get_start_address (abfd); |
9943d318 | 1778 | else |
82d442c6 MF |
1779 | addr = 0; |
1780 | sim_pc_set (cpu, addr); | |
af9f7da7 | 1781 | |
9943d318 | 1782 | if (abfd != NULL) |
937af0fd | 1783 | state->avr_pc22 = (bfd_get_mach (abfd) >= bfd_mach_avr6); |
9943d318 MF |
1784 | |
1785 | return SIM_RC_OK; | |
af9f7da7 | 1786 | } |