Commit | Line | Data |
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c906108c SS |
1 | /*> interp.c <*/ |
2 | /* Simulator for the MIPS architecture. | |
3 | ||
4 | This file is part of the MIPS sim | |
5 | ||
6 | THIS SOFTWARE IS NOT COPYRIGHTED | |
7 | ||
8 | Cygnus offers the following for use in the public domain. Cygnus | |
9 | makes no warranty with regard to the software or it's performance | |
10 | and the user accepts the software "AS IS" with all faults. | |
11 | ||
12 | CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO | |
13 | THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
14 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
15 | ||
c906108c SS |
16 | NOTEs: |
17 | ||
18 | The IDT monitor (found on the VR4300 board), seems to lie about | |
19 | register contents. It seems to treat the registers as sign-extended | |
20 | 32-bit values. This cause *REAL* problems when single-stepping 64-bit | |
21 | code on the hardware. | |
22 | ||
23 | */ | |
24 | ||
6df01ab8 MF |
25 | /* This must come before any other includes. */ |
26 | #include "defs.h" | |
27 | ||
c906108c SS |
28 | #include "bfd.h" |
29 | #include "sim-main.h" | |
30 | #include "sim-utils.h" | |
31 | #include "sim-options.h" | |
32 | #include "sim-assert.h" | |
33 | #include "sim-hw.h" | |
34 | ||
35 | #include "itable.h" | |
36 | ||
c906108c SS |
37 | #include <stdio.h> |
38 | #include <stdarg.h> | |
39 | #include <ansidecl.h> | |
40 | #include <ctype.h> | |
41 | #include <limits.h> | |
42 | #include <math.h> | |
c906108c | 43 | #include <stdlib.h> |
c906108c | 44 | #include <string.h> |
c906108c SS |
45 | |
46 | #include "getopt.h" | |
47 | #include "libiberty.h" | |
48 | #include "bfd.h" | |
b36d953b | 49 | #include "elf-bfd.h" |
df68e12b MF |
50 | #include "sim/callback.h" /* GDB simulator callback interface */ |
51 | #include "sim/sim.h" /* GDB simulator interface */ | |
5c6f091a | 52 | #include "sim-syscall.h" /* Simulator system call support */ |
c906108c | 53 | |
bdca5ee4 TT |
54 | char* pr_addr (SIM_ADDR addr); |
55 | char* pr_uword64 (uword64 addr); | |
c906108c SS |
56 | |
57 | ||
58 | /* Within interp.c we refer to the sim_state and sim_cpu directly. */ | |
59 | #define CPU cpu | |
60 | #define SD sd | |
61 | ||
62 | ||
63 | /* The following reserved instruction value is used when a simulator | |
64 | trap is required. NOTE: Care must be taken, since this value may be | |
65 | used in later revisions of the MIPS ISA. */ | |
66 | ||
8e394ffc | 67 | #define RSVD_INSTRUCTION (0x00000039) |
c906108c SS |
68 | #define RSVD_INSTRUCTION_MASK (0xFC00003F) |
69 | ||
70 | #define RSVD_INSTRUCTION_ARG_SHIFT 6 | |
71 | #define RSVD_INSTRUCTION_ARG_MASK 0xFFFFF | |
72 | ||
73 | ||
74 | /* Bits in the Debug register */ | |
75 | #define Debug_DBD 0x80000000 /* Debug Branch Delay */ | |
76 | #define Debug_DM 0x40000000 /* Debug Mode */ | |
77 | #define Debug_DBp 0x00000002 /* Debug Breakpoint indicator */ | |
78 | ||
79 | /*---------------------------------------------------------------------------*/ | |
80 | /*-- GDB simulator interface ------------------------------------------------*/ | |
81 | /*---------------------------------------------------------------------------*/ | |
82 | ||
bdca5ee4 | 83 | static void ColdReset (SIM_DESC sd); |
c906108c SS |
84 | |
85 | /*---------------------------------------------------------------------------*/ | |
86 | ||
87 | ||
88 | ||
89 | #define DELAYSLOT() {\ | |
90 | if (STATE & simDELAYSLOT)\ | |
91 | sim_io_eprintf(sd,"Delay slot already activated (branch in delay slot?)\n");\ | |
92 | STATE |= simDELAYSLOT;\ | |
93 | } | |
94 | ||
95 | #define JALDELAYSLOT() {\ | |
96 | DELAYSLOT ();\ | |
97 | STATE |= simJALDELAYSLOT;\ | |
98 | } | |
99 | ||
100 | #define NULLIFY() {\ | |
101 | STATE &= ~simDELAYSLOT;\ | |
102 | STATE |= simSKIPNEXT;\ | |
103 | } | |
104 | ||
105 | #define CANCELDELAYSLOT() {\ | |
106 | DSSTATE = 0;\ | |
107 | STATE &= ~(simDELAYSLOT | simJALDELAYSLOT);\ | |
108 | } | |
109 | ||
110 | #define INDELAYSLOT() ((STATE & simDELAYSLOT) != 0) | |
111 | #define INJALDELAYSLOT() ((STATE & simJALDELAYSLOT) != 0) | |
112 | ||
adf40b2e JM |
113 | /* Note that the monitor code essentially assumes this layout of memory. |
114 | If you change these, change the monitor code, too. */ | |
14fb6c5a TS |
115 | /* FIXME Currently addresses are truncated to 32-bits, see |
116 | mips/sim-main.c:address_translation(). If that changes, then these | |
117 | values will need to be extended, and tested for more carefully. */ | |
c906108c SS |
118 | #define K0BASE (0x80000000) |
119 | #define K0SIZE (0x20000000) | |
120 | #define K1BASE (0xA0000000) | |
121 | #define K1SIZE (0x20000000) | |
adf40b2e JM |
122 | |
123 | /* Simple run-time monitor support. | |
124 | ||
125 | We emulate the monitor by placing magic reserved instructions at | |
126 | the monitor's entry points; when we hit these instructions, instead | |
127 | of raising an exception (as we would normally), we look at the | |
128 | instruction and perform the appropriate monitory operation. | |
129 | ||
130 | `*_monitor_base' are the physical addresses at which the corresponding | |
131 | monitor vectors are located. `0' means none. By default, | |
132 | install all three. | |
133 | The RSVD_INSTRUCTION... macros specify the magic instructions we | |
134 | use at the monitor entry points. */ | |
135 | static int firmware_option_p = 0; | |
136 | static SIM_ADDR idt_monitor_base = 0xBFC00000; | |
137 | static SIM_ADDR pmon_monitor_base = 0xBFC00500; | |
138 | static SIM_ADDR lsipmon_monitor_base = 0xBFC00200; | |
139 | ||
140 | static SIM_RC sim_firmware_command (SIM_DESC sd, char* arg); | |
141 | ||
c8847145 | 142 | #define MEM_SIZE (8 << 20) /* 8 MBytes */ |
c906108c SS |
143 | |
144 | ||
29bc024d | 145 | #if WITH_TRACE_ANY_P |
c906108c SS |
146 | static char *tracefile = "trace.din"; /* default filename for trace log */ |
147 | FILE *tracefh = NULL; | |
bdca5ee4 | 148 | static void open_trace (SIM_DESC sd); |
29bc024d MF |
149 | #else |
150 | #define open_trace(sd) | |
151 | #endif | |
c906108c SS |
152 | |
153 | static const char * get_insn_name (sim_cpu *, int); | |
154 | ||
155 | /* simulation target board. NULL=canonical */ | |
156 | static char* board = NULL; | |
157 | ||
158 | ||
159 | static DECLARE_OPTION_HANDLER (mips_option_handler); | |
160 | ||
161 | enum { | |
162 | OPTION_DINERO_TRACE = OPTION_START, | |
163 | OPTION_DINERO_FILE, | |
adf40b2e | 164 | OPTION_FIRMWARE, |
2525df03 | 165 | OPTION_INFO_MEMORY, |
c906108c SS |
166 | OPTION_BOARD |
167 | }; | |
168 | ||
2525df03 | 169 | static int display_mem_info = 0; |
c906108c SS |
170 | |
171 | static SIM_RC | |
8ac57fbd MF |
172 | mips_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt, char *arg, |
173 | int is_command) | |
c906108c SS |
174 | { |
175 | int cpu_nr; | |
176 | switch (opt) | |
177 | { | |
178 | case OPTION_DINERO_TRACE: /* ??? */ | |
29bc024d | 179 | #if WITH_TRACE_ANY_P |
c906108c SS |
180 | /* Eventually the simTRACE flag could be treated as a toggle, to |
181 | allow external control of the program points being traced | |
182 | (i.e. only from main onwards, excluding the run-time setup, | |
183 | etc.). */ | |
184 | for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++) | |
185 | { | |
186 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); | |
187 | if (arg == NULL) | |
188 | STATE |= simTRACE; | |
189 | else if (strcmp (arg, "yes") == 0) | |
190 | STATE |= simTRACE; | |
191 | else if (strcmp (arg, "no") == 0) | |
192 | STATE &= ~simTRACE; | |
193 | else if (strcmp (arg, "on") == 0) | |
194 | STATE |= simTRACE; | |
195 | else if (strcmp (arg, "off") == 0) | |
196 | STATE &= ~simTRACE; | |
197 | else | |
198 | { | |
199 | fprintf (stderr, "Unrecognized dinero-trace option `%s'\n", arg); | |
200 | return SIM_RC_FAIL; | |
201 | } | |
202 | } | |
203 | return SIM_RC_OK; | |
29bc024d | 204 | #else /* !WITH_TRACE_ANY_P */ |
c906108c SS |
205 | fprintf(stderr,"\ |
206 | Simulator constructed without dinero tracing support (for performance).\n\ | |
29bc024d | 207 | Re-compile simulator with \"-DWITH_TRACE_ANY_P\" to enable this option.\n"); |
c906108c | 208 | return SIM_RC_FAIL; |
29bc024d | 209 | #endif /* !WITH_TRACE_ANY_P */ |
c906108c SS |
210 | |
211 | case OPTION_DINERO_FILE: | |
29bc024d | 212 | #if WITH_TRACE_ANY_P |
c906108c SS |
213 | if (optarg != NULL) { |
214 | char *tmp; | |
215 | tmp = (char *)malloc(strlen(optarg) + 1); | |
216 | if (tmp == NULL) | |
217 | { | |
218 | sim_io_printf(sd,"Failed to allocate buffer for tracefile name \"%s\"\n",optarg); | |
219 | return SIM_RC_FAIL; | |
220 | } | |
221 | else { | |
222 | strcpy(tmp,optarg); | |
223 | tracefile = tmp; | |
224 | sim_io_printf(sd,"Placing trace information into file \"%s\"\n",tracefile); | |
225 | } | |
226 | } | |
29bc024d | 227 | #endif /* WITH_TRACE_ANY_P */ |
c906108c SS |
228 | return SIM_RC_OK; |
229 | ||
adf40b2e JM |
230 | case OPTION_FIRMWARE: |
231 | return sim_firmware_command (sd, arg); | |
232 | ||
c906108c SS |
233 | case OPTION_BOARD: |
234 | { | |
235 | if (arg) | |
236 | { | |
237 | board = zalloc(strlen(arg) + 1); | |
238 | strcpy(board, arg); | |
239 | } | |
240 | return SIM_RC_OK; | |
241 | } | |
2525df03 NC |
242 | |
243 | case OPTION_INFO_MEMORY: | |
244 | display_mem_info = 1; | |
245 | break; | |
c906108c SS |
246 | } |
247 | ||
248 | return SIM_RC_OK; | |
249 | } | |
250 | ||
251 | ||
252 | static const OPTION mips_options[] = | |
253 | { | |
254 | { {"dinero-trace", optional_argument, NULL, OPTION_DINERO_TRACE}, | |
255 | '\0', "on|off", "Enable dinero tracing", | |
256 | mips_option_handler }, | |
257 | { {"dinero-file", required_argument, NULL, OPTION_DINERO_FILE}, | |
258 | '\0', "FILE", "Write dinero trace to FILE", | |
259 | mips_option_handler }, | |
adf40b2e JM |
260 | { {"firmware", required_argument, NULL, OPTION_FIRMWARE}, |
261 | '\0', "[idt|pmon|lsipmon|none][@ADDRESS]", "Emulate ROM monitor", | |
262 | mips_option_handler }, | |
c906108c SS |
263 | { {"board", required_argument, NULL, OPTION_BOARD}, |
264 | '\0', "none" /* rely on compile-time string concatenation for other options */ | |
265 | ||
266 | #define BOARD_JMR3904 "jmr3904" | |
267 | "|" BOARD_JMR3904 | |
268 | #define BOARD_JMR3904_PAL "jmr3904pal" | |
269 | "|" BOARD_JMR3904_PAL | |
270 | #define BOARD_JMR3904_DEBUG "jmr3904debug" | |
271 | "|" BOARD_JMR3904_DEBUG | |
43e526b9 JM |
272 | #define BOARD_BSP "bsp" |
273 | "|" BOARD_BSP | |
c906108c SS |
274 | |
275 | , "Customize simulation for a particular board.", mips_option_handler }, | |
276 | ||
2525df03 NC |
277 | /* These next two options have the same names as ones found in the |
278 | memory_options[] array in common/sim-memopt.c. This is because | |
279 | the intention is to provide an alternative handler for those two | |
280 | options. We need an alternative handler because the memory | |
281 | regions are not set up until after the command line arguments | |
282 | have been parsed, and so we cannot display the memory info whilst | |
283 | processing the command line. There is a hack in sim_open to | |
284 | remove these handlers when we want the real --memory-info option | |
285 | to work. */ | |
286 | { { "info-memory", no_argument, NULL, OPTION_INFO_MEMORY }, | |
287 | '\0', NULL, "List configured memory regions", mips_option_handler }, | |
288 | { { "memory-info", no_argument, NULL, OPTION_INFO_MEMORY }, | |
289 | '\0', NULL, NULL, mips_option_handler }, | |
290 | ||
c906108c SS |
291 | { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL } |
292 | }; | |
293 | ||
294 | ||
295 | int interrupt_pending; | |
296 | ||
297 | void | |
298 | interrupt_event (SIM_DESC sd, void *data) | |
299 | { | |
300 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ | |
034685f9 | 301 | address_word cia = CPU_PC_GET (cpu); |
c906108c SS |
302 | if (SR & status_IE) |
303 | { | |
304 | interrupt_pending = 0; | |
305 | SignalExceptionInterrupt (1); /* interrupt "1" */ | |
306 | } | |
307 | else if (!interrupt_pending) | |
308 | sim_events_schedule (sd, 1, interrupt_event, data); | |
309 | } | |
310 | ||
311 | ||
312 | /*---------------------------------------------------------------------------*/ | |
313 | /*-- Device registration hook -----------------------------------------------*/ | |
314 | /*---------------------------------------------------------------------------*/ | |
315 | static void device_init(SIM_DESC sd) { | |
316 | #ifdef DEVICE_INIT | |
317 | extern void register_devices(SIM_DESC); | |
318 | register_devices(sd); | |
319 | #endif | |
320 | } | |
321 | ||
322 | /*---------------------------------------------------------------------------*/ | |
323 | /*-- GDB simulator interface ------------------------------------------------*/ | |
324 | /*---------------------------------------------------------------------------*/ | |
325 | ||
7bebb329 MF |
326 | static sim_cia |
327 | mips_pc_get (sim_cpu *cpu) | |
328 | { | |
329 | return PC; | |
330 | } | |
331 | ||
332 | static void | |
333 | mips_pc_set (sim_cpu *cpu, sim_cia pc) | |
334 | { | |
335 | PC = pc; | |
336 | } | |
337 | ||
e1211e55 MF |
338 | static int mips_reg_fetch (SIM_CPU *, int, unsigned char *, int); |
339 | static int mips_reg_store (SIM_CPU *, int, unsigned char *, int); | |
340 | ||
c906108c | 341 | SIM_DESC |
2e3d4f4d MF |
342 | sim_open (SIM_OPEN_KIND kind, host_callback *cb, |
343 | struct bfd *abfd, char * const *argv) | |
c906108c | 344 | { |
7bebb329 | 345 | int i; |
8ea7241c MF |
346 | SIM_DESC sd = sim_state_alloc_extra (kind, cb, |
347 | sizeof (struct mips_sim_state)); | |
7bebb329 | 348 | sim_cpu *cpu; |
c906108c SS |
349 | |
350 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
351 | ||
7bebb329 | 352 | /* The cpu data is kept in a separately allocated chunk of memory. */ |
d5a71b11 | 353 | if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK) |
7bebb329 MF |
354 | return 0; |
355 | ||
356 | cpu = STATE_CPU (sd, 0); /* FIXME */ | |
357 | ||
c906108c | 358 | /* FIXME: watchpoints code shouldn't need this */ |
c906108c SS |
359 | STATE_WATCHPOINTS (sd)->interrupt_handler = interrupt_event; |
360 | ||
361 | /* Initialize the mechanism for doing insn profiling. */ | |
362 | CPU_INSN_NAME (cpu) = get_insn_name; | |
363 | CPU_MAX_INSNS (cpu) = nr_itable_entries; | |
364 | ||
365 | STATE = 0; | |
366 | ||
367 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) | |
368 | return 0; | |
369 | sim_add_option_table (sd, NULL, mips_options); | |
370 | ||
371 | ||
77cf2ef5 | 372 | /* The parser will print an error message for us, so we silently return. */ |
c906108c SS |
373 | if (sim_parse_args (sd, argv) != SIM_RC_OK) |
374 | { | |
375 | /* Uninstall the modules to avoid memory leaks, | |
376 | file descriptor leaks, etc. */ | |
377 | sim_module_uninstall (sd); | |
378 | return 0; | |
379 | } | |
380 | ||
381 | /* handle board-specific memory maps */ | |
382 | if (board == NULL) | |
383 | { | |
384 | /* Allocate core managed memory */ | |
14fb6c5a TS |
385 | sim_memopt *entry, *match = NULL; |
386 | address_word mem_size = 0; | |
387 | int mapped = 0; | |
adf40b2e | 388 | |
c906108c SS |
389 | /* For compatibility with the old code - under this (at level one) |
390 | are the kernel spaces K0 & K1. Both of these map to a single | |
391 | smaller sub region */ | |
392 | sim_do_command(sd," memory region 0x7fff8000,0x8000") ; /* MTZ- 32 k stack */ | |
14fb6c5a TS |
393 | |
394 | /* Look for largest memory region defined on command-line at | |
395 | phys address 0. */ | |
14fb6c5a TS |
396 | for (entry = STATE_MEMOPT (sd); entry != NULL; entry = entry->next) |
397 | { | |
398 | /* If we find an entry at address 0, then we will end up | |
399 | allocating a new buffer in the "memory alias" command | |
400 | below. The region at address 0 will be deleted. */ | |
401 | address_word size = (entry->modulo != 0 | |
402 | ? entry->modulo : entry->nr_bytes); | |
403 | if (entry->addr == 0 | |
404 | && (!match || entry->level < match->level)) | |
405 | match = entry; | |
406 | else if (entry->addr == K0BASE || entry->addr == K1BASE) | |
407 | mapped = 1; | |
408 | else | |
409 | { | |
410 | sim_memopt *alias; | |
411 | for (alias = entry->alias; alias != NULL; alias = alias->next) | |
412 | { | |
413 | if (alias->addr == 0 | |
414 | && (!match || entry->level < match->level)) | |
415 | match = entry; | |
416 | else if (alias->addr == K0BASE || alias->addr == K1BASE) | |
417 | mapped = 1; | |
418 | } | |
419 | } | |
420 | } | |
421 | ||
422 | if (!mapped) | |
423 | { | |
424 | if (match) | |
425 | { | |
426 | /* Get existing memory region size. */ | |
427 | mem_size = (match->modulo != 0 | |
428 | ? match->modulo : match->nr_bytes); | |
429 | /* Delete old region. */ | |
dae666c9 | 430 | sim_do_commandf (sd, "memory delete %d:0x%" PRIxTW "@%d", |
14fb6c5a TS |
431 | match->space, match->addr, match->level); |
432 | } | |
433 | else if (mem_size == 0) | |
434 | mem_size = MEM_SIZE; | |
435 | /* Limit to KSEG1 size (512MB) */ | |
436 | if (mem_size > K1SIZE) | |
437 | mem_size = K1SIZE; | |
438 | /* memory alias K1BASE@1,K1SIZE%MEMSIZE,K0BASE */ | |
dae666c9 | 439 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x%%0x%lx,0x%0x", |
14fb6c5a | 440 | K1BASE, K1SIZE, (long)mem_size, K0BASE); |
168671c1 FS |
441 | if (WITH_TARGET_WORD_BITSIZE == 64) |
442 | sim_do_commandf (sd, "memory alias 0x%x,0x%" PRIxTW ",0x%" PRIxTA, | |
443 | (K0BASE), mem_size, EXTENDED(K0BASE)); | |
14fb6c5a TS |
444 | } |
445 | ||
c906108c SS |
446 | device_init(sd); |
447 | } | |
43e526b9 JM |
448 | else if (board != NULL |
449 | && (strcmp(board, BOARD_BSP) == 0)) | |
450 | { | |
451 | int i; | |
452 | ||
453 | STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT; | |
454 | ||
455 | /* ROM: 0x9FC0_0000 - 0x9FFF_FFFF and 0xBFC0_0000 - 0xBFFF_FFFF */ | |
dae666c9 | 456 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x,0x%0x", |
43e526b9 JM |
457 | 0x9FC00000, |
458 | 4 * 1024 * 1024, /* 4 MB */ | |
459 | 0xBFC00000); | |
460 | ||
461 | /* SRAM: 0x8000_0000 - 0x803F_FFFF and 0xA000_0000 - 0xA03F_FFFF */ | |
dae666c9 | 462 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x,0x%0x", |
43e526b9 JM |
463 | 0x80000000, |
464 | 4 * 1024 * 1024, /* 4 MB */ | |
465 | 0xA0000000); | |
466 | ||
467 | /* DRAM: 0x8800_0000 - 0x89FF_FFFF and 0xA800_0000 - 0xA9FF_FFFF */ | |
468 | for (i=0; i<8; i++) /* 32 MB total */ | |
469 | { | |
470 | unsigned size = 4 * 1024 * 1024; /* 4 MB */ | |
dae666c9 | 471 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x,0x%0x", |
43e526b9 JM |
472 | 0x88000000 + (i * size), |
473 | size, | |
474 | 0xA8000000 + (i * size)); | |
475 | } | |
476 | } | |
c906108c | 477 | #if (WITH_HW) |
43e526b9 JM |
478 | else if (board != NULL |
479 | && (strcmp(board, BOARD_JMR3904) == 0 || | |
480 | strcmp(board, BOARD_JMR3904_PAL) == 0 || | |
481 | strcmp(board, BOARD_JMR3904_DEBUG) == 0)) | |
c906108c SS |
482 | { |
483 | /* match VIRTUAL memory layout of JMR-TX3904 board */ | |
484 | int i; | |
485 | ||
adf40b2e JM |
486 | /* --- disable monitor unless forced on by user --- */ |
487 | ||
488 | if (! firmware_option_p) | |
489 | { | |
490 | idt_monitor_base = 0; | |
491 | pmon_monitor_base = 0; | |
492 | lsipmon_monitor_base = 0; | |
493 | } | |
494 | ||
c906108c SS |
495 | /* --- environment --- */ |
496 | ||
497 | STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT; | |
498 | ||
499 | /* --- memory --- */ | |
500 | ||
501 | /* ROM: 0x9FC0_0000 - 0x9FFF_FFFF and 0xBFC0_0000 - 0xBFFF_FFFF */ | |
dae666c9 | 502 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x,0x%0x", |
c906108c SS |
503 | 0x9FC00000, |
504 | 4 * 1024 * 1024, /* 4 MB */ | |
505 | 0xBFC00000); | |
506 | ||
507 | /* SRAM: 0x8000_0000 - 0x803F_FFFF and 0xA000_0000 - 0xA03F_FFFF */ | |
dae666c9 | 508 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x,0x%0x", |
c906108c SS |
509 | 0x80000000, |
510 | 4 * 1024 * 1024, /* 4 MB */ | |
511 | 0xA0000000); | |
512 | ||
513 | /* DRAM: 0x8800_0000 - 0x89FF_FFFF and 0xA800_0000 - 0xA9FF_FFFF */ | |
514 | for (i=0; i<8; i++) /* 32 MB total */ | |
515 | { | |
516 | unsigned size = 4 * 1024 * 1024; /* 4 MB */ | |
dae666c9 | 517 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x,0x%0x", |
c906108c SS |
518 | 0x88000000 + (i * size), |
519 | size, | |
520 | 0xA8000000 + (i * size)); | |
521 | } | |
522 | ||
cb7450ea | 523 | /* Dummy memory regions for unsimulated devices - sorted by address */ |
c906108c | 524 | |
dae666c9 MF |
525 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xB1000000, 0x400); /* ISA I/O */ |
526 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xB2100000, 0x004); /* ISA ctl */ | |
527 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xB2500000, 0x004); /* LED/switch */ | |
528 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xB2700000, 0x004); /* RTC */ | |
529 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xB3C00000, 0x004); /* RTC */ | |
530 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xFFFF8000, 0x900); /* DRAMC */ | |
531 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xFFFF9000, 0x200); /* EBIF */ | |
532 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xFFFFE000, 0x01c); /* EBIF */ | |
533 | sim_do_commandf (sd, "memory alias 0x%x@1,0x%x", 0xFFFFF500, 0x300); /* PIO */ | |
cb7450ea | 534 | |
c906108c SS |
535 | |
536 | /* --- simulated devices --- */ | |
537 | sim_hw_parse (sd, "/tx3904irc@0xffffc000/reg 0xffffc000 0x20"); | |
538 | sim_hw_parse (sd, "/tx3904cpu"); | |
539 | sim_hw_parse (sd, "/tx3904tmr@0xfffff000/reg 0xfffff000 0x100"); | |
540 | sim_hw_parse (sd, "/tx3904tmr@0xfffff100/reg 0xfffff100 0x100"); | |
541 | sim_hw_parse (sd, "/tx3904tmr@0xfffff200/reg 0xfffff200 0x100"); | |
542 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/reg 0xfffff300 0x100"); | |
543 | { | |
544 | /* FIXME: poking at dv-sockser internals, use tcp backend if | |
545 | --sockser_addr option was given.*/ | |
8ea881d9 | 546 | #ifdef HAVE_DV_SOCKSER |
c906108c | 547 | extern char* sockser_addr; |
8ea881d9 MF |
548 | #else |
549 | # define sockser_addr NULL | |
550 | #endif | |
551 | if (sockser_addr == NULL) | |
c906108c SS |
552 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/backend stdio"); |
553 | else | |
554 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/backend tcp"); | |
555 | } | |
556 | sim_hw_parse (sd, "/tx3904sio@0xfffff400/reg 0xfffff400 0x100"); | |
557 | sim_hw_parse (sd, "/tx3904sio@0xfffff400/backend stdio"); | |
558 | ||
559 | /* -- device connections --- */ | |
560 | sim_hw_parse (sd, "/tx3904irc > ip level /tx3904cpu"); | |
561 | sim_hw_parse (sd, "/tx3904tmr@0xfffff000 > int tmr0 /tx3904irc"); | |
562 | sim_hw_parse (sd, "/tx3904tmr@0xfffff100 > int tmr1 /tx3904irc"); | |
563 | sim_hw_parse (sd, "/tx3904tmr@0xfffff200 > int tmr2 /tx3904irc"); | |
564 | sim_hw_parse (sd, "/tx3904sio@0xfffff300 > int sio0 /tx3904irc"); | |
565 | sim_hw_parse (sd, "/tx3904sio@0xfffff400 > int sio1 /tx3904irc"); | |
566 | ||
567 | /* add PAL timer & I/O module */ | |
568 | if(! strcmp(board, BOARD_JMR3904_PAL)) | |
569 | { | |
570 | /* the device */ | |
571 | sim_hw_parse (sd, "/pal@0xffff0000"); | |
572 | sim_hw_parse (sd, "/pal@0xffff0000/reg 0xffff0000 64"); | |
573 | ||
574 | /* wire up interrupt ports to irc */ | |
575 | sim_hw_parse (sd, "/pal@0x31000000 > countdown tmr0 /tx3904irc"); | |
576 | sim_hw_parse (sd, "/pal@0x31000000 > timer tmr1 /tx3904irc"); | |
577 | sim_hw_parse (sd, "/pal@0x31000000 > int int0 /tx3904irc"); | |
578 | } | |
579 | ||
580 | if(! strcmp(board, BOARD_JMR3904_DEBUG)) | |
581 | { | |
582 | /* -- DEBUG: glue interrupt generators --- */ | |
583 | sim_hw_parse (sd, "/glue@0xffff0000/reg 0xffff0000 0x50"); | |
584 | sim_hw_parse (sd, "/glue@0xffff0000 > int0 int0 /tx3904irc"); | |
585 | sim_hw_parse (sd, "/glue@0xffff0000 > int1 int1 /tx3904irc"); | |
586 | sim_hw_parse (sd, "/glue@0xffff0000 > int2 int2 /tx3904irc"); | |
587 | sim_hw_parse (sd, "/glue@0xffff0000 > int3 int3 /tx3904irc"); | |
588 | sim_hw_parse (sd, "/glue@0xffff0000 > int4 int4 /tx3904irc"); | |
589 | sim_hw_parse (sd, "/glue@0xffff0000 > int5 int5 /tx3904irc"); | |
590 | sim_hw_parse (sd, "/glue@0xffff0000 > int6 int6 /tx3904irc"); | |
591 | sim_hw_parse (sd, "/glue@0xffff0000 > int7 int7 /tx3904irc"); | |
592 | sim_hw_parse (sd, "/glue@0xffff0000 > int8 dmac0 /tx3904irc"); | |
593 | sim_hw_parse (sd, "/glue@0xffff0000 > int9 dmac1 /tx3904irc"); | |
594 | sim_hw_parse (sd, "/glue@0xffff0000 > int10 dmac2 /tx3904irc"); | |
595 | sim_hw_parse (sd, "/glue@0xffff0000 > int11 dmac3 /tx3904irc"); | |
596 | sim_hw_parse (sd, "/glue@0xffff0000 > int12 sio0 /tx3904irc"); | |
597 | sim_hw_parse (sd, "/glue@0xffff0000 > int13 sio1 /tx3904irc"); | |
598 | sim_hw_parse (sd, "/glue@0xffff0000 > int14 tmr0 /tx3904irc"); | |
599 | sim_hw_parse (sd, "/glue@0xffff0000 > int15 tmr1 /tx3904irc"); | |
600 | sim_hw_parse (sd, "/glue@0xffff0000 > int16 tmr2 /tx3904irc"); | |
601 | sim_hw_parse (sd, "/glue@0xffff0000 > int17 nmi /tx3904cpu"); | |
602 | } | |
603 | ||
604 | device_init(sd); | |
605 | } | |
606 | #endif | |
607 | ||
2525df03 NC |
608 | if (display_mem_info) |
609 | { | |
610 | struct option_list * ol; | |
611 | struct option_list * prev; | |
612 | ||
613 | /* This is a hack. We want to execute the real --memory-info command | |
614 | line switch which is handled in common/sim-memopts.c, not the | |
615 | override we have defined in this file. So we remove the | |
616 | mips_options array from the state options list. This is safe | |
617 | because we have now processed all of the command line. */ | |
618 | for (ol = STATE_OPTIONS (sd), prev = NULL; | |
619 | ol != NULL; | |
620 | prev = ol, ol = ol->next) | |
621 | if (ol->options == mips_options) | |
622 | break; | |
623 | ||
624 | SIM_ASSERT (ol != NULL); | |
625 | ||
626 | if (prev == NULL) | |
627 | STATE_OPTIONS (sd) = ol->next; | |
628 | else | |
629 | prev->next = ol->next; | |
630 | ||
631 | sim_do_commandf (sd, "memory-info"); | |
632 | } | |
c906108c SS |
633 | |
634 | /* check for/establish the a reference program image */ | |
635 | if (sim_analyze_program (sd, | |
636 | (STATE_PROG_ARGV (sd) != NULL | |
637 | ? *STATE_PROG_ARGV (sd) | |
638 | : NULL), | |
639 | abfd) != SIM_RC_OK) | |
640 | { | |
641 | sim_module_uninstall (sd); | |
642 | return 0; | |
643 | } | |
644 | ||
645 | /* Configure/verify the target byte order and other runtime | |
646 | configuration options */ | |
647 | if (sim_config (sd) != SIM_RC_OK) | |
648 | { | |
649 | sim_module_uninstall (sd); | |
650 | return 0; | |
651 | } | |
652 | ||
653 | if (sim_post_argv_init (sd) != SIM_RC_OK) | |
654 | { | |
655 | /* Uninstall the modules to avoid memory leaks, | |
656 | file descriptor leaks, etc. */ | |
657 | sim_module_uninstall (sd); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | /* verify assumptions the simulator made about the host type system. | |
662 | This macro does not return if there is a problem */ | |
663 | SIM_ASSERT (sizeof(int) == (4 * sizeof(char))); | |
664 | SIM_ASSERT (sizeof(word64) == (8 * sizeof(char))); | |
665 | ||
666 | /* This is NASTY, in that we are assuming the size of specific | |
667 | registers: */ | |
668 | { | |
669 | int rn; | |
670 | for (rn = 0; (rn < (LAST_EMBED_REGNUM + 1)); rn++) | |
671 | { | |
672 | if (rn < 32) | |
673 | cpu->register_widths[rn] = WITH_TARGET_WORD_BITSIZE; | |
ee7254b0 | 674 | else if ((rn >= FGR_BASE) && (rn < (FGR_BASE + NR_FGR))) |
c906108c SS |
675 | cpu->register_widths[rn] = WITH_TARGET_FLOATING_POINT_BITSIZE; |
676 | else if ((rn >= 33) && (rn <= 37)) | |
677 | cpu->register_widths[rn] = WITH_TARGET_WORD_BITSIZE; | |
678 | else if ((rn == SRIDX) | |
679 | || (rn == FCR0IDX) | |
680 | || (rn == FCR31IDX) | |
681 | || ((rn >= 72) && (rn <= 89))) | |
682 | cpu->register_widths[rn] = 32; | |
683 | else | |
684 | cpu->register_widths[rn] = 0; | |
685 | } | |
686 | ||
687 | ||
688 | } | |
689 | ||
c906108c SS |
690 | if (STATE & simTRACE) |
691 | open_trace(sd); | |
c906108c | 692 | |
adf40b2e JM |
693 | /* |
694 | sim_io_eprintf (sd, "idt@%x pmon@%x lsipmon@%x\n", | |
695 | idt_monitor_base, | |
696 | pmon_monitor_base, | |
697 | lsipmon_monitor_base); | |
698 | */ | |
c906108c SS |
699 | |
700 | /* Write the monitor trap address handlers into the monitor (eeprom) | |
701 | address space. This can only be done once the target endianness | |
702 | has been determined. */ | |
adf40b2e JM |
703 | if (idt_monitor_base != 0) |
704 | { | |
705 | unsigned loop; | |
168671c1 | 706 | address_word idt_monitor_size = 1 << 11; |
adf40b2e JM |
707 | |
708 | /* the default monitor region */ | |
168671c1 FS |
709 | if (WITH_TARGET_WORD_BITSIZE == 64) |
710 | sim_do_commandf (sd, "memory alias 0x%x,0x%" PRIxTW ",0x%" PRIxTA, | |
711 | idt_monitor_base, idt_monitor_size, | |
712 | EXTENDED (idt_monitor_base)); | |
713 | else | |
dae666c9 | 714 | sim_do_commandf (sd, "memory region 0x%x,0x%" PRIxTA, |
168671c1 | 715 | idt_monitor_base, idt_monitor_size); |
adf40b2e JM |
716 | |
717 | /* Entry into the IDT monitor is via fixed address vectors, and | |
718 | not using machine instructions. To avoid clashing with use of | |
719 | the MIPS TRAP system, we place our own (simulator specific) | |
720 | "undefined" instructions into the relevant vector slots. */ | |
721 | for (loop = 0; (loop < idt_monitor_size); loop += 4) | |
722 | { | |
723 | address_word vaddr = (idt_monitor_base + loop); | |
724 | unsigned32 insn = (RSVD_INSTRUCTION | | |
725 | (((loop >> 2) & RSVD_INSTRUCTION_ARG_MASK) | |
726 | << RSVD_INSTRUCTION_ARG_SHIFT)); | |
727 | H2T (insn); | |
8ac57fbd | 728 | sim_write (sd, vaddr, (unsigned char *)&insn, sizeof (insn)); |
adf40b2e JM |
729 | } |
730 | } | |
731 | ||
732 | if ((pmon_monitor_base != 0) || (lsipmon_monitor_base != 0)) | |
733 | { | |
c906108c SS |
734 | /* The PMON monitor uses the same address space, but rather than |
735 | branching into it the address of a routine is loaded. We can | |
736 | cheat for the moment, and direct the PMON routine to IDT style | |
737 | instructions within the monitor space. This relies on the IDT | |
738 | monitor not using the locations from 0xBFC00500 onwards as its | |
739 | entry points.*/ | |
adf40b2e JM |
740 | unsigned loop; |
741 | for (loop = 0; (loop < 24); loop++) | |
742 | { | |
743 | unsigned32 value = ((0x500 - 8) / 8); /* default UNDEFINED reason code */ | |
744 | switch (loop) | |
745 | { | |
c906108c SS |
746 | case 0: /* read */ |
747 | value = 7; | |
748 | break; | |
749 | case 1: /* write */ | |
750 | value = 8; | |
751 | break; | |
752 | case 2: /* open */ | |
753 | value = 6; | |
754 | break; | |
755 | case 3: /* close */ | |
756 | value = 10; | |
757 | break; | |
758 | case 5: /* printf */ | |
759 | value = ((0x500 - 16) / 8); /* not an IDT reason code */ | |
760 | break; | |
761 | case 8: /* cliexit */ | |
762 | value = 17; | |
763 | break; | |
764 | case 11: /* flush_cache */ | |
765 | value = 28; | |
766 | break; | |
767 | } | |
adf40b2e JM |
768 | |
769 | SIM_ASSERT (idt_monitor_base != 0); | |
770 | value = ((unsigned int) idt_monitor_base + (value * 8)); | |
c906108c | 771 | H2T (value); |
c906108c | 772 | |
adf40b2e JM |
773 | if (pmon_monitor_base != 0) |
774 | { | |
775 | address_word vaddr = (pmon_monitor_base + (loop * 4)); | |
8ac57fbd | 776 | sim_write (sd, vaddr, (unsigned char *)&value, sizeof (value)); |
adf40b2e JM |
777 | } |
778 | ||
779 | if (lsipmon_monitor_base != 0) | |
780 | { | |
781 | address_word vaddr = (lsipmon_monitor_base + (loop * 4)); | |
8ac57fbd | 782 | sim_write (sd, vaddr, (unsigned char *)&value, sizeof (value)); |
adf40b2e | 783 | } |
c906108c | 784 | } |
adf40b2e JM |
785 | |
786 | /* Write an abort sequence into the TRAP (common) exception vector | |
787 | addresses. This is to catch code executing a TRAP (et.al.) | |
788 | instruction without installing a trap handler. */ | |
789 | if ((idt_monitor_base != 0) || | |
790 | (pmon_monitor_base != 0) || | |
791 | (lsipmon_monitor_base != 0)) | |
792 | { | |
793 | unsigned32 halt[2] = { 0x2404002f /* addiu r4, r0, 47 */, | |
794 | HALT_INSTRUCTION /* BREAK */ }; | |
795 | H2T (halt[0]); | |
796 | H2T (halt[1]); | |
8ac57fbd MF |
797 | sim_write (sd, 0x80000000, (unsigned char *) halt, sizeof (halt)); |
798 | sim_write (sd, 0x80000180, (unsigned char *) halt, sizeof (halt)); | |
799 | sim_write (sd, 0x80000200, (unsigned char *) halt, sizeof (halt)); | |
adf40b2e | 800 | /* XXX: Write here unconditionally? */ |
8ac57fbd MF |
801 | sim_write (sd, 0xBFC00200, (unsigned char *) halt, sizeof (halt)); |
802 | sim_write (sd, 0xBFC00380, (unsigned char *) halt, sizeof (halt)); | |
803 | sim_write (sd, 0xBFC00400, (unsigned char *) halt, sizeof (halt)); | |
adf40b2e | 804 | } |
c906108c SS |
805 | } |
806 | ||
7bebb329 MF |
807 | /* CPU specific initialization. */ |
808 | for (i = 0; i < MAX_NR_PROCESSORS; ++i) | |
809 | { | |
810 | SIM_CPU *cpu = STATE_CPU (sd, i); | |
c906108c | 811 | |
e1211e55 MF |
812 | CPU_REG_FETCH (cpu) = mips_reg_fetch; |
813 | CPU_REG_STORE (cpu) = mips_reg_store; | |
7bebb329 MF |
814 | CPU_PC_FETCH (cpu) = mips_pc_get; |
815 | CPU_PC_STORE (cpu) = mips_pc_set; | |
816 | } | |
c906108c SS |
817 | |
818 | return sd; | |
819 | } | |
820 | ||
29bc024d | 821 | #if WITH_TRACE_ANY_P |
c906108c | 822 | static void |
8ac57fbd | 823 | open_trace (SIM_DESC sd) |
c906108c SS |
824 | { |
825 | tracefh = fopen(tracefile,"wb+"); | |
826 | if (tracefh == NULL) | |
827 | { | |
828 | sim_io_eprintf(sd,"Failed to create file \"%s\", writing trace information to stderr.\n",tracefile); | |
829 | tracefh = stderr; | |
830 | } | |
831 | } | |
29bc024d | 832 | #endif |
c906108c SS |
833 | |
834 | /* Return name of an insn, used by insn profiling. */ | |
835 | static const char * | |
836 | get_insn_name (sim_cpu *cpu, int i) | |
837 | { | |
838 | return itable[i].name; | |
839 | } | |
840 | ||
841 | void | |
6e4f085c | 842 | mips_sim_close (SIM_DESC sd, int quitting) |
c906108c | 843 | { |
29bc024d | 844 | #if WITH_TRACE_ANY_P |
c906108c SS |
845 | if (tracefh != NULL && tracefh != stderr) |
846 | fclose(tracefh); | |
847 | tracefh = NULL; | |
29bc024d | 848 | #endif |
c906108c SS |
849 | } |
850 | ||
e1211e55 MF |
851 | static int |
852 | mips_reg_store (SIM_CPU *cpu, int rn, unsigned char *memory, int length) | |
c906108c | 853 | { |
c906108c SS |
854 | /* NOTE: gdb (the client) stores registers in target byte order |
855 | while the simulator uses host byte order */ | |
c906108c SS |
856 | |
857 | /* Unfortunately this suffers from the same problem as the register | |
858 | numbering one. We need to know what the width of each logical | |
859 | register number is for the architecture being simulated. */ | |
860 | ||
861 | if (cpu->register_widths[rn] == 0) | |
862 | { | |
e1211e55 | 863 | sim_io_eprintf (CPU_STATE (cpu), "Invalid register width for %d (register store ignored)\n", rn); |
c906108c SS |
864 | return 0; |
865 | } | |
866 | ||
ee7254b0 | 867 | if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR) |
c906108c | 868 | { |
ee7254b0 | 869 | cpu->fpr_state[rn - FGR_BASE] = fmt_uninterpreted; |
c906108c SS |
870 | if (cpu->register_widths[rn] == 32) |
871 | { | |
a0b3c4fd JM |
872 | if (length == 8) |
873 | { | |
ee7254b0 | 874 | cpu->fgr[rn - FGR_BASE] = |
a0b3c4fd JM |
875 | (unsigned32) T2H_8 (*(unsigned64*)memory); |
876 | return 8; | |
877 | } | |
878 | else | |
879 | { | |
ee7254b0 | 880 | cpu->fgr[rn - FGR_BASE] = T2H_4 (*(unsigned32*)memory); |
a0b3c4fd JM |
881 | return 4; |
882 | } | |
c906108c SS |
883 | } |
884 | else | |
885 | { | |
14fb6c5a TS |
886 | if (length == 8) |
887 | { | |
888 | cpu->fgr[rn - FGR_BASE] = T2H_8 (*(unsigned64*)memory); | |
889 | return 8; | |
890 | } | |
891 | else | |
892 | { | |
893 | cpu->fgr[rn - FGR_BASE] = T2H_4 (*(unsigned32*)memory); | |
894 | return 4; | |
895 | } | |
c906108c SS |
896 | } |
897 | } | |
898 | ||
899 | if (cpu->register_widths[rn] == 32) | |
900 | { | |
a0b3c4fd JM |
901 | if (length == 8) |
902 | { | |
903 | cpu->registers[rn] = | |
904 | (unsigned32) T2H_8 (*(unsigned64*)memory); | |
905 | return 8; | |
906 | } | |
907 | else | |
908 | { | |
909 | cpu->registers[rn] = T2H_4 (*(unsigned32*)memory); | |
910 | return 4; | |
911 | } | |
c906108c SS |
912 | } |
913 | else | |
914 | { | |
14fb6c5a TS |
915 | if (length == 8) |
916 | { | |
917 | cpu->registers[rn] = T2H_8 (*(unsigned64*)memory); | |
918 | return 8; | |
919 | } | |
920 | else | |
921 | { | |
922 | cpu->registers[rn] = (signed32) T2H_4(*(unsigned32*)memory); | |
923 | return 4; | |
924 | } | |
c906108c SS |
925 | } |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
e1211e55 MF |
930 | static int |
931 | mips_reg_fetch (SIM_CPU *cpu, int rn, unsigned char *memory, int length) | |
c906108c | 932 | { |
c906108c SS |
933 | /* NOTE: gdb (the client) stores registers in target byte order |
934 | while the simulator uses host byte order */ | |
c906108c SS |
935 | |
936 | if (cpu->register_widths[rn] == 0) | |
937 | { | |
e1211e55 | 938 | sim_io_eprintf (CPU_STATE (cpu), "Invalid register width for %d (register fetch ignored)\n", rn); |
c906108c SS |
939 | return 0; |
940 | } | |
941 | ||
c906108c | 942 | /* Any floating point register */ |
ee7254b0 | 943 | if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR) |
c906108c SS |
944 | { |
945 | if (cpu->register_widths[rn] == 32) | |
946 | { | |
a0b3c4fd JM |
947 | if (length == 8) |
948 | { | |
949 | *(unsigned64*)memory = | |
ee7254b0 | 950 | H2T_8 ((unsigned32) (cpu->fgr[rn - FGR_BASE])); |
a0b3c4fd JM |
951 | return 8; |
952 | } | |
953 | else | |
954 | { | |
ee7254b0 | 955 | *(unsigned32*)memory = H2T_4 (cpu->fgr[rn - FGR_BASE]); |
a0b3c4fd JM |
956 | return 4; |
957 | } | |
c906108c SS |
958 | } |
959 | else | |
960 | { | |
14fb6c5a TS |
961 | if (length == 8) |
962 | { | |
963 | *(unsigned64*)memory = H2T_8 (cpu->fgr[rn - FGR_BASE]); | |
964 | return 8; | |
965 | } | |
966 | else | |
967 | { | |
968 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->fgr[rn - FGR_BASE])); | |
969 | return 4; | |
970 | } | |
c906108c SS |
971 | } |
972 | } | |
973 | ||
974 | if (cpu->register_widths[rn] == 32) | |
975 | { | |
a0b3c4fd JM |
976 | if (length == 8) |
977 | { | |
978 | *(unsigned64*)memory = | |
979 | H2T_8 ((unsigned32) (cpu->registers[rn])); | |
980 | return 8; | |
981 | } | |
982 | else | |
983 | { | |
984 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->registers[rn])); | |
985 | return 4; | |
986 | } | |
c906108c SS |
987 | } |
988 | else | |
989 | { | |
14fb6c5a TS |
990 | if (length == 8) |
991 | { | |
992 | *(unsigned64*)memory = | |
993 | H2T_8 ((unsigned64) (cpu->registers[rn])); | |
994 | return 8; | |
995 | } | |
996 | else | |
997 | { | |
998 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->registers[rn])); | |
999 | return 4; | |
1000 | } | |
c906108c SS |
1001 | } |
1002 | ||
1003 | return 0; | |
1004 | } | |
1005 | ||
c906108c | 1006 | SIM_RC |
2e3d4f4d MF |
1007 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, |
1008 | char * const *argv, char * const *env) | |
c906108c SS |
1009 | { |
1010 | ||
1011 | #ifdef DEBUG | |
1012 | #if 0 /* FIXME: doesn't compile */ | |
1013 | printf("DBG: sim_create_inferior entered: start_address = 0x%s\n", | |
1014 | pr_addr(PC)); | |
1015 | #endif | |
1016 | #endif /* DEBUG */ | |
1017 | ||
1018 | ColdReset(sd); | |
1019 | ||
1020 | if (abfd != NULL) | |
1021 | { | |
1022 | /* override PC value set by ColdReset () */ | |
1023 | int cpu_nr; | |
1024 | for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++) | |
1025 | { | |
1026 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); | |
b36d953b MF |
1027 | sim_cia pc = bfd_get_start_address (abfd); |
1028 | ||
b312488f FS |
1029 | /* The 64-bit BFD sign-extends MIPS addresses to model |
1030 | 32-bit compatibility segments with 64-bit addressing. | |
1031 | These addresses work as is on 64-bit targets but | |
1032 | can be truncated for 32-bit targets. */ | |
1033 | if (WITH_TARGET_WORD_BITSIZE == 32) | |
b36d953b MF |
1034 | pc = (unsigned32) pc; |
1035 | ||
1036 | CPU_PC_SET (cpu, pc); | |
c906108c SS |
1037 | } |
1038 | } | |
1039 | ||
1040 | #if 0 /* def DEBUG */ | |
1041 | if (argv || env) | |
1042 | { | |
1043 | /* We should really place the argv slot values into the argument | |
1044 | registers, and onto the stack as required. However, this | |
1045 | assumes that we have a stack defined, which is not | |
1046 | necessarily true at the moment. */ | |
1047 | char **cptr; | |
1048 | sim_io_printf(sd,"sim_create_inferior() : passed arguments ignored\n"); | |
1049 | for (cptr = argv; (cptr && *cptr); cptr++) | |
1050 | printf("DBG: arg \"%s\"\n",*cptr); | |
1051 | } | |
1052 | #endif /* DEBUG */ | |
1053 | ||
1054 | return SIM_RC_OK; | |
1055 | } | |
1056 | ||
c906108c SS |
1057 | /*---------------------------------------------------------------------------*/ |
1058 | /*-- Private simulator support interface ------------------------------------*/ | |
1059 | /*---------------------------------------------------------------------------*/ | |
1060 | ||
1061 | /* Read a null terminated string from memory, return in a buffer */ | |
1062 | static char * | |
1063 | fetch_str (SIM_DESC sd, | |
1064 | address_word addr) | |
1065 | { | |
1066 | char *buf; | |
1067 | int nr = 0; | |
8ac57fbd | 1068 | unsigned char null; |
c906108c SS |
1069 | while (sim_read (sd, addr + nr, &null, 1) == 1 && null != 0) |
1070 | nr++; | |
1071 | buf = NZALLOC (char, nr + 1); | |
8ac57fbd | 1072 | sim_read (sd, addr, (unsigned char *)buf, nr); |
c906108c SS |
1073 | return buf; |
1074 | } | |
1075 | ||
adf40b2e JM |
1076 | |
1077 | /* Implements the "sim firmware" command: | |
1078 | sim firmware NAME[@ADDRESS] --- emulate ROM monitor named NAME. | |
1079 | NAME can be idt, pmon, or lsipmon. If omitted, ADDRESS | |
1080 | defaults to the normal address for that monitor. | |
1081 | sim firmware none --- don't emulate any ROM monitor. Useful | |
1082 | if you need a clean address space. */ | |
1083 | static SIM_RC | |
1084 | sim_firmware_command (SIM_DESC sd, char *arg) | |
1085 | { | |
1086 | int address_present = 0; | |
1087 | SIM_ADDR address; | |
1088 | ||
1089 | /* Signal occurrence of this option. */ | |
1090 | firmware_option_p = 1; | |
1091 | ||
1092 | /* Parse out the address, if present. */ | |
1093 | { | |
1094 | char *p = strchr (arg, '@'); | |
1095 | if (p) | |
1096 | { | |
1097 | char *q; | |
1098 | address_present = 1; | |
1099 | p ++; /* skip over @ */ | |
1100 | ||
1101 | address = strtoul (p, &q, 0); | |
1102 | if (*q != '\0') | |
1103 | { | |
1104 | sim_io_printf (sd, "Invalid address given to the" | |
1105 | "`sim firmware NAME@ADDRESS' command: %s\n", | |
1106 | p); | |
1107 | return SIM_RC_FAIL; | |
1108 | } | |
1109 | } | |
1110 | else | |
b4b6c939 AC |
1111 | { |
1112 | address_present = 0; | |
1113 | address = -1; /* Dummy value. */ | |
1114 | } | |
adf40b2e JM |
1115 | } |
1116 | ||
1117 | if (! strncmp (arg, "idt", 3)) | |
1118 | { | |
1119 | idt_monitor_base = address_present ? address : 0xBFC00000; | |
1120 | pmon_monitor_base = 0; | |
1121 | lsipmon_monitor_base = 0; | |
1122 | } | |
1123 | else if (! strncmp (arg, "pmon", 4)) | |
1124 | { | |
1125 | /* pmon uses indirect calls. Hook into implied idt. */ | |
1126 | pmon_monitor_base = address_present ? address : 0xBFC00500; | |
1127 | idt_monitor_base = pmon_monitor_base - 0x500; | |
1128 | lsipmon_monitor_base = 0; | |
1129 | } | |
1130 | else if (! strncmp (arg, "lsipmon", 7)) | |
1131 | { | |
1132 | /* lsipmon uses indirect calls. Hook into implied idt. */ | |
1133 | pmon_monitor_base = 0; | |
1134 | lsipmon_monitor_base = address_present ? address : 0xBFC00200; | |
1135 | idt_monitor_base = lsipmon_monitor_base - 0x200; | |
1136 | } | |
1137 | else if (! strncmp (arg, "none", 4)) | |
1138 | { | |
1139 | if (address_present) | |
1140 | { | |
1141 | sim_io_printf (sd, | |
1142 | "The `sim firmware none' command does " | |
1143 | "not take an `ADDRESS' argument.\n"); | |
1144 | return SIM_RC_FAIL; | |
1145 | } | |
1146 | idt_monitor_base = 0; | |
1147 | pmon_monitor_base = 0; | |
1148 | lsipmon_monitor_base = 0; | |
1149 | } | |
1150 | else | |
1151 | { | |
1152 | sim_io_printf (sd, "\ | |
1153 | Unrecognized name given to the `sim firmware NAME' command: %s\n\ | |
1154 | Recognized firmware names are: `idt', `pmon', `lsipmon', and `none'.\n", | |
1155 | arg); | |
1156 | return SIM_RC_FAIL; | |
1157 | } | |
1158 | ||
1159 | return SIM_RC_OK; | |
1160 | } | |
1161 | ||
5c6f091a FS |
1162 | /* stat structures from MIPS32/64. */ |
1163 | static const char stat32_map[] = | |
1164 | "st_dev,2:st_ino,2:st_mode,4:st_nlink,2:st_uid,2:st_gid,2" | |
1165 | ":st_rdev,2:st_size,4:st_atime,4:st_spare1,4:st_mtime,4:st_spare2,4" | |
1166 | ":st_ctime,4:st_spare3,4:st_blksize,4:st_blocks,4:st_spare4,8"; | |
1167 | ||
1168 | static const char stat64_map[] = | |
1169 | "st_dev,2:st_ino,2:st_mode,4:st_nlink,2:st_uid,2:st_gid,2" | |
1170 | ":st_rdev,2:st_size,8:st_atime,8:st_spare1,8:st_mtime,8:st_spare2,8" | |
1171 | ":st_ctime,8:st_spare3,8:st_blksize,8:st_blocks,8:st_spare4,16"; | |
1172 | ||
1173 | /* Map for calls using the host struct stat. */ | |
1174 | static const CB_TARGET_DEFS_MAP CB_stat_map[] = | |
1175 | { | |
1176 | { "stat", CB_SYS_stat, 15 }, | |
1177 | { 0, -1, -1 } | |
1178 | }; | |
adf40b2e JM |
1179 | |
1180 | ||
c906108c | 1181 | /* Simple monitor interface (currently setup for the IDT and PMON monitors) */ |
8030f857 | 1182 | int |
c906108c SS |
1183 | sim_monitor (SIM_DESC sd, |
1184 | sim_cpu *cpu, | |
1185 | address_word cia, | |
1186 | unsigned int reason) | |
1187 | { | |
1188 | #ifdef DEBUG | |
1189 | printf("DBG: sim_monitor: entered (reason = %d)\n",reason); | |
1190 | #endif /* DEBUG */ | |
1191 | ||
1192 | /* The IDT monitor actually allows two instructions per vector | |
1193 | slot. However, the simulator currently causes a trap on each | |
1194 | individual instruction. We cheat, and lose the bottom bit. */ | |
1195 | reason >>= 1; | |
1196 | ||
1197 | /* The following callback functions are available, however the | |
1198 | monitor we are simulating does not make use of them: get_errno, | |
5c6f091a | 1199 | isatty, rename, system and time. */ |
c906108c SS |
1200 | switch (reason) |
1201 | { | |
1202 | ||
1203 | case 6: /* int open(char *path,int flags) */ | |
1204 | { | |
1205 | char *path = fetch_str (sd, A0); | |
1206 | V0 = sim_io_open (sd, path, (int)A1); | |
d79fe0d6 | 1207 | free (path); |
c906108c SS |
1208 | break; |
1209 | } | |
1210 | ||
1211 | case 7: /* int read(int file,char *ptr,int len) */ | |
1212 | { | |
1213 | int fd = A0; | |
1214 | int nr = A2; | |
1215 | char *buf = zalloc (nr); | |
1216 | V0 = sim_io_read (sd, fd, buf, nr); | |
8ac57fbd | 1217 | sim_write (sd, A1, (unsigned char *)buf, nr); |
d79fe0d6 | 1218 | free (buf); |
c906108c SS |
1219 | } |
1220 | break; | |
1221 | ||
1222 | case 8: /* int write(int file,char *ptr,int len) */ | |
1223 | { | |
1224 | int fd = A0; | |
1225 | int nr = A2; | |
1226 | char *buf = zalloc (nr); | |
8ac57fbd | 1227 | sim_read (sd, A1, (unsigned char *)buf, nr); |
c906108c | 1228 | V0 = sim_io_write (sd, fd, buf, nr); |
f8df4c77 TS |
1229 | if (fd == 1) |
1230 | sim_io_flush_stdout (sd); | |
1231 | else if (fd == 2) | |
1232 | sim_io_flush_stderr (sd); | |
d79fe0d6 | 1233 | free (buf); |
c906108c SS |
1234 | break; |
1235 | } | |
1236 | ||
1237 | case 10: /* int close(int file) */ | |
1238 | { | |
1239 | V0 = sim_io_close (sd, (int)A0); | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | case 2: /* Densan monitor: char inbyte(int waitflag) */ | |
1244 | { | |
1245 | if (A0 == 0) /* waitflag == NOWAIT */ | |
1246 | V0 = (unsigned_word)-1; | |
1247 | } | |
1248 | /* Drop through to case 11 */ | |
1249 | ||
1250 | case 11: /* char inbyte(void) */ | |
1251 | { | |
1252 | char tmp; | |
43e526b9 JM |
1253 | /* ensure that all output has gone... */ |
1254 | sim_io_flush_stdout (sd); | |
c906108c SS |
1255 | if (sim_io_read_stdin (sd, &tmp, sizeof(char)) != sizeof(char)) |
1256 | { | |
1257 | sim_io_error(sd,"Invalid return from character read"); | |
1258 | V0 = (unsigned_word)-1; | |
1259 | } | |
1260 | else | |
1261 | V0 = (unsigned_word)tmp; | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | case 3: /* Densan monitor: void co(char chr) */ | |
1266 | case 12: /* void outbyte(char chr) : write a byte to "stdout" */ | |
1267 | { | |
1268 | char tmp = (char)(A0 & 0xFF); | |
1269 | sim_io_write_stdout (sd, &tmp, sizeof(char)); | |
1270 | break; | |
1271 | } | |
1272 | ||
5c6f091a FS |
1273 | case 13: /* int unlink(const char *path) */ |
1274 | { | |
1275 | char *path = fetch_str (sd, A0); | |
1276 | V0 = sim_io_unlink (sd, path); | |
1277 | free (path); | |
1278 | break; | |
1279 | } | |
1280 | ||
1281 | case 14: /* int lseek(int fd, int offset, int whence) */ | |
1282 | { | |
1283 | V0 = sim_io_lseek (sd, A0, A1, A2); | |
1284 | break; | |
1285 | } | |
1286 | ||
1287 | case 15: /* int stat(const char *path, struct stat *buf); */ | |
1288 | { | |
1289 | /* As long as the infrastructure doesn't cache anything | |
1290 | related to the stat mapping, this trick gets us a dual | |
1291 | "struct stat"-type mapping in the least error-prone way. */ | |
1292 | host_callback *cb = STATE_CALLBACK (sd); | |
1293 | const char *saved_map = cb->stat_map; | |
1294 | CB_TARGET_DEFS_MAP *saved_syscall_map = cb->syscall_map; | |
1295 | bfd *prog_bfd = STATE_PROG_BFD (sd); | |
1296 | int is_elf32bit = (elf_elfheader(prog_bfd)->e_ident[EI_CLASS] == | |
1297 | ELFCLASS32); | |
1298 | static CB_SYSCALL s; | |
1299 | CB_SYSCALL_INIT (&s); | |
1300 | s.func = 15; | |
1301 | /* Mask out the sign extension part for 64-bit targets because the | |
1302 | MIPS simulator's memory model is still 32-bit. */ | |
1303 | s.arg1 = A0 & 0xFFFFFFFF; | |
1304 | s.arg2 = A1 & 0xFFFFFFFF; | |
1305 | s.p1 = (PTR) sd; | |
1306 | s.p2 = (PTR) cpu; | |
1307 | s.read_mem = sim_syscall_read_mem; | |
1308 | s.write_mem = sim_syscall_write_mem; | |
1309 | ||
1310 | cb->syscall_map = (CB_TARGET_DEFS_MAP *) CB_stat_map; | |
1311 | cb->stat_map = is_elf32bit ? stat32_map : stat64_map; | |
1312 | ||
1313 | if (cb_syscall (cb, &s) != CB_RC_OK) | |
1314 | sim_engine_halt (sd, cpu, NULL, mips_pc_get (cpu), | |
1315 | sim_stopped, SIM_SIGILL); | |
1316 | ||
1317 | V0 = s.result; | |
1318 | cb->stat_map = saved_map; | |
1319 | cb->syscall_map = saved_syscall_map; | |
1320 | break; | |
1321 | } | |
1322 | ||
c906108c SS |
1323 | case 17: /* void _exit() */ |
1324 | { | |
1325 | sim_io_eprintf (sd, "sim_monitor(17): _exit(int reason) to be coded\n"); | |
1326 | sim_engine_halt (SD, CPU, NULL, NULL_CIA, sim_exited, | |
1327 | (unsigned int)(A0 & 0xFFFFFFFF)); | |
1328 | break; | |
1329 | } | |
1330 | ||
e80fc152 | 1331 | case 28: /* PMON flush_cache */ |
c906108c SS |
1332 | break; |
1333 | ||
1334 | case 55: /* void get_mem_info(unsigned int *ptr) */ | |
1335 | /* in: A0 = pointer to three word memory location */ | |
1336 | /* out: [A0 + 0] = size */ | |
1337 | /* [A0 + 4] = instruction cache size */ | |
1338 | /* [A0 + 8] = data cache size */ | |
1339 | { | |
14fb6c5a | 1340 | unsigned_4 value; |
c906108c | 1341 | unsigned_4 zero = 0; |
14fb6c5a TS |
1342 | address_word mem_size; |
1343 | sim_memopt *entry, *match = NULL; | |
1344 | ||
1345 | /* Search for memory region mapped to KSEG0 or KSEG1. */ | |
1346 | for (entry = STATE_MEMOPT (sd); | |
1347 | entry != NULL; | |
1348 | entry = entry->next) | |
1349 | { | |
1350 | if ((entry->addr == K0BASE || entry->addr == K1BASE) | |
1351 | && (!match || entry->level < match->level)) | |
1352 | match = entry; | |
1353 | else | |
1354 | { | |
1355 | sim_memopt *alias; | |
1356 | for (alias = entry->alias; | |
1357 | alias != NULL; | |
1358 | alias = alias->next) | |
1359 | if ((alias->addr == K0BASE || alias->addr == K1BASE) | |
1360 | && (!match || entry->level < match->level)) | |
1361 | match = entry; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | /* Get region size, limit to KSEG1 size (512MB). */ | |
1366 | SIM_ASSERT (match != NULL); | |
1367 | mem_size = (match->modulo != 0 | |
1368 | ? match->modulo : match->nr_bytes); | |
1369 | if (mem_size > K1SIZE) | |
1370 | mem_size = K1SIZE; | |
1371 | ||
1372 | value = mem_size; | |
c906108c | 1373 | H2T (value); |
8ac57fbd MF |
1374 | sim_write (sd, A0 + 0, (unsigned char *)&value, 4); |
1375 | sim_write (sd, A0 + 4, (unsigned char *)&zero, 4); | |
1376 | sim_write (sd, A0 + 8, (unsigned char *)&zero, 4); | |
5accf1ff | 1377 | /* sim_io_eprintf (sd, "sim: get_mem_info() deprecated\n"); */ |
c906108c SS |
1378 | break; |
1379 | } | |
1380 | ||
e80fc152 | 1381 | case 158: /* PMON printf */ |
c906108c SS |
1382 | /* in: A0 = pointer to format string */ |
1383 | /* A1 = optional argument 1 */ | |
1384 | /* A2 = optional argument 2 */ | |
1385 | /* A3 = optional argument 3 */ | |
1386 | /* out: void */ | |
1387 | /* The following is based on the PMON printf source */ | |
1388 | { | |
1389 | address_word s = A0; | |
8ac57fbd | 1390 | unsigned char c; |
6828a302 | 1391 | address_word *ap = &A1; /* 1st argument */ |
c906108c SS |
1392 | /* This isn't the quickest way, since we call the host print |
1393 | routine for every character almost. But it does avoid | |
1394 | having to allocate and manage a temporary string buffer. */ | |
1395 | /* TODO: Include check that we only use three arguments (A1, | |
1396 | A2 and A3) */ | |
1397 | while (sim_read (sd, s++, &c, 1) && c != '\0') | |
1398 | { | |
1399 | if (c == '%') | |
1400 | { | |
1401 | char tmp[40]; | |
1402 | enum {FMT_RJUST, FMT_LJUST, FMT_RJUST0, FMT_CENTER} fmt = FMT_RJUST; | |
1403 | int width = 0, trunc = 0, haddot = 0, longlong = 0; | |
1404 | while (sim_read (sd, s++, &c, 1) && c != '\0') | |
1405 | { | |
1406 | if (strchr ("dobxXulscefg%", c)) | |
1407 | break; | |
1408 | else if (c == '-') | |
1409 | fmt = FMT_LJUST; | |
1410 | else if (c == '0') | |
1411 | fmt = FMT_RJUST0; | |
1412 | else if (c == '~') | |
1413 | fmt = FMT_CENTER; | |
1414 | else if (c == '*') | |
1415 | { | |
1416 | if (haddot) | |
1417 | trunc = (int)*ap++; | |
1418 | else | |
1419 | width = (int)*ap++; | |
1420 | } | |
1421 | else if (c >= '1' && c <= '9') | |
1422 | { | |
1423 | address_word t = s; | |
1424 | unsigned int n; | |
1425 | while (sim_read (sd, s++, &c, 1) == 1 && isdigit (c)) | |
1426 | tmp[s - t] = c; | |
1427 | tmp[s - t] = '\0'; | |
1428 | n = (unsigned int)strtol(tmp,NULL,10); | |
1429 | if (haddot) | |
1430 | trunc = n; | |
1431 | else | |
1432 | width = n; | |
1433 | s--; | |
1434 | } | |
1435 | else if (c == '.') | |
1436 | haddot = 1; | |
1437 | } | |
1438 | switch (c) | |
1439 | { | |
1440 | case '%': | |
1441 | sim_io_printf (sd, "%%"); | |
1442 | break; | |
1443 | case 's': | |
1444 | if ((int)*ap != 0) | |
1445 | { | |
1446 | address_word p = *ap++; | |
8ac57fbd | 1447 | unsigned char ch; |
c906108c SS |
1448 | while (sim_read (sd, p++, &ch, 1) == 1 && ch != '\0') |
1449 | sim_io_printf(sd, "%c", ch); | |
1450 | } | |
1451 | else | |
1452 | sim_io_printf(sd,"(null)"); | |
1453 | break; | |
1454 | case 'c': | |
1455 | sim_io_printf (sd, "%c", (int)*ap++); | |
1456 | break; | |
1457 | default: | |
1458 | if (c == 'l') | |
1459 | { | |
1460 | sim_read (sd, s++, &c, 1); | |
1461 | if (c == 'l') | |
1462 | { | |
1463 | longlong = 1; | |
1464 | sim_read (sd, s++, &c, 1); | |
1465 | } | |
1466 | } | |
1467 | if (strchr ("dobxXu", c)) | |
1468 | { | |
1469 | word64 lv = (word64) *ap++; | |
1470 | if (c == 'b') | |
1471 | sim_io_printf(sd,"<binary not supported>"); | |
1472 | else | |
1473 | { | |
6828a302 MF |
1474 | #define _P(c, fmt64, fmt32) \ |
1475 | case c: \ | |
1476 | if (longlong) \ | |
1477 | sim_io_printf (sd, "%" fmt64, lv); \ | |
1478 | else \ | |
1479 | sim_io_printf (sd, "%" fmt32, (int)lv); \ | |
1480 | break; | |
1481 | #define P(c, fmtc) _P(c, PRI##fmtc##64, PRI##fmtc##32) | |
1482 | switch (c) | |
1483 | { | |
1484 | P('d', d) | |
1485 | P('o', o) | |
1486 | P('x', x) | |
1487 | P('X', X) | |
1488 | P('u', u) | |
1489 | } | |
c906108c | 1490 | } |
6828a302 MF |
1491 | #undef P |
1492 | #undef _P | |
c906108c SS |
1493 | } |
1494 | else if (strchr ("eEfgG", c)) | |
1495 | { | |
1496 | double dbl = *(double*)(ap++); | |
6828a302 MF |
1497 | |
1498 | #define P(c, fmtc) \ | |
1499 | case c: \ | |
1500 | sim_io_printf (sd, "%*.*" #fmtc, width, trunc, dbl); \ | |
1501 | break; | |
1502 | switch (c) | |
1503 | { | |
1504 | P('e', e) | |
1505 | P('E', E) | |
1506 | P('f', f) | |
1507 | P('g', g) | |
1508 | P('G', G) | |
1509 | } | |
1510 | #undef P | |
c906108c SS |
1511 | trunc = 0; |
1512 | } | |
1513 | } | |
1514 | } | |
1515 | else | |
1516 | sim_io_printf(sd, "%c", c); | |
1517 | } | |
1518 | break; | |
1519 | } | |
1520 | ||
1521 | default: | |
8030f857 BE |
1522 | /* Unknown reason. */ |
1523 | return 0; | |
c906108c | 1524 | } |
8030f857 | 1525 | return 1; |
c906108c SS |
1526 | } |
1527 | ||
1528 | /* Store a word into memory. */ | |
1529 | ||
1530 | static void | |
1531 | store_word (SIM_DESC sd, | |
1532 | sim_cpu *cpu, | |
1533 | address_word cia, | |
1534 | uword64 vaddr, | |
1535 | signed_word val) | |
1536 | { | |
26f8bf63 | 1537 | address_word paddr = vaddr; |
c906108c SS |
1538 | |
1539 | if ((vaddr & 3) != 0) | |
1540 | SignalExceptionAddressStore (); | |
1541 | else | |
1542 | { | |
26f8bf63 MF |
1543 | const uword64 mask = 7; |
1544 | uword64 memval; | |
1545 | unsigned int byte; | |
1546 | ||
1547 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)); | |
1548 | byte = (vaddr & mask) ^ (BigEndianCPU << 2); | |
1549 | memval = ((uword64) val) << (8 * byte); | |
1550 | StoreMemory (AccessLength_WORD, memval, 0, paddr, vaddr, | |
1551 | isREAL); | |
c906108c SS |
1552 | } |
1553 | } | |
1554 | ||
1555 | /* Load a word from memory. */ | |
1556 | ||
1557 | static signed_word | |
1558 | load_word (SIM_DESC sd, | |
1559 | sim_cpu *cpu, | |
1560 | address_word cia, | |
1561 | uword64 vaddr) | |
1562 | { | |
1563 | if ((vaddr & 3) != 0) | |
1564 | { | |
1565 | SIM_CORE_SIGNAL (SD, cpu, cia, read_map, AccessLength_WORD+1, vaddr, read_transfer, sim_core_unaligned_signal); | |
1566 | } | |
1567 | else | |
1568 | { | |
26f8bf63 MF |
1569 | address_word paddr = vaddr; |
1570 | const uword64 mask = 0x7; | |
1571 | const unsigned int reverse = ReverseEndian ? 1 : 0; | |
1572 | const unsigned int bigend = BigEndianCPU ? 1 : 0; | |
1573 | uword64 memval; | |
1574 | unsigned int byte; | |
1575 | ||
1576 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (reverse << 2)); | |
1577 | LoadMemory (&memval, NULL, AccessLength_WORD, paddr, vaddr, isDATA, | |
1578 | isREAL); | |
1579 | byte = (vaddr & mask) ^ (bigend << 2); | |
1580 | return EXTEND32 (memval >> (8 * byte)); | |
c906108c SS |
1581 | } |
1582 | ||
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | /* Simulate the mips16 entry and exit pseudo-instructions. These | |
1587 | would normally be handled by the reserved instruction exception | |
1588 | code, but for ease of simulation we just handle them directly. */ | |
1589 | ||
1590 | static void | |
1591 | mips16_entry (SIM_DESC sd, | |
1592 | sim_cpu *cpu, | |
1593 | address_word cia, | |
1594 | unsigned int insn) | |
1595 | { | |
1596 | int aregs, sregs, rreg; | |
1597 | ||
1598 | #ifdef DEBUG | |
1599 | printf("DBG: mips16_entry: entered (insn = 0x%08X)\n",insn); | |
1600 | #endif /* DEBUG */ | |
1601 | ||
1602 | aregs = (insn & 0x700) >> 8; | |
1603 | sregs = (insn & 0x0c0) >> 6; | |
1604 | rreg = (insn & 0x020) >> 5; | |
1605 | ||
1606 | /* This should be checked by the caller. */ | |
1607 | if (sregs == 3) | |
1608 | abort (); | |
1609 | ||
1610 | if (aregs < 5) | |
1611 | { | |
1612 | int i; | |
1613 | signed_word tsp; | |
1614 | ||
1615 | /* This is the entry pseudo-instruction. */ | |
1616 | ||
1617 | for (i = 0; i < aregs; i++) | |
1618 | store_word (SD, CPU, cia, (uword64) (SP + 4 * i), GPR[i + 4]); | |
1619 | ||
1620 | tsp = SP; | |
1621 | SP -= 32; | |
1622 | ||
1623 | if (rreg) | |
1624 | { | |
1625 | tsp -= 4; | |
1626 | store_word (SD, CPU, cia, (uword64) tsp, RA); | |
1627 | } | |
1628 | ||
1629 | for (i = 0; i < sregs; i++) | |
1630 | { | |
1631 | tsp -= 4; | |
1632 | store_word (SD, CPU, cia, (uword64) tsp, GPR[16 + i]); | |
1633 | } | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | int i; | |
1638 | signed_word tsp; | |
1639 | ||
1640 | /* This is the exit pseudo-instruction. */ | |
1641 | ||
1642 | tsp = SP + 32; | |
1643 | ||
1644 | if (rreg) | |
1645 | { | |
1646 | tsp -= 4; | |
1647 | RA = load_word (SD, CPU, cia, (uword64) tsp); | |
1648 | } | |
1649 | ||
1650 | for (i = 0; i < sregs; i++) | |
1651 | { | |
1652 | tsp -= 4; | |
1653 | GPR[i + 16] = load_word (SD, CPU, cia, (uword64) tsp); | |
1654 | } | |
1655 | ||
1656 | SP += 32; | |
1657 | ||
1658 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
1659 | { | |
1660 | if (aregs == 5) | |
1661 | { | |
1662 | FGR[0] = WORD64LO (GPR[4]); | |
1663 | FPR_STATE[0] = fmt_uninterpreted; | |
1664 | } | |
1665 | else if (aregs == 6) | |
1666 | { | |
1667 | FGR[0] = WORD64LO (GPR[5]); | |
1668 | FGR[1] = WORD64LO (GPR[4]); | |
1669 | FPR_STATE[0] = fmt_uninterpreted; | |
1670 | FPR_STATE[1] = fmt_uninterpreted; | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | PC = RA; | |
1675 | } | |
1676 | ||
1677 | } | |
1678 | ||
1679 | /*-- trace support ----------------------------------------------------------*/ | |
1680 | ||
29bc024d | 1681 | /* The trace support is provided (if required) in the memory accessing |
c906108c SS |
1682 | routines. Since we are also providing the architecture specific |
1683 | features, the architecture simulation code can also deal with | |
29bc024d | 1684 | notifying the trace world of cache flushes, etc. Similarly we do |
c906108c SS |
1685 | not need to provide profiling support in the simulator engine, |
1686 | since we can sample in the instruction fetch control loop. By | |
29bc024d | 1687 | defining the trace manifest, we add tracing as a run-time |
c906108c SS |
1688 | option. */ |
1689 | ||
29bc024d | 1690 | #if WITH_TRACE_ANY_P |
c906108c SS |
1691 | /* Tracing by default produces "din" format (as required by |
1692 | dineroIII). Each line of such a trace file *MUST* have a din label | |
1693 | and address field. The rest of the line is ignored, so comments can | |
1694 | be included if desired. The first field is the label which must be | |
1695 | one of the following values: | |
1696 | ||
1697 | 0 read data | |
1698 | 1 write data | |
1699 | 2 instruction fetch | |
1700 | 3 escape record (treated as unknown access type) | |
1701 | 4 escape record (causes cache flush) | |
1702 | ||
1703 | The address field is a 32bit (lower-case) hexadecimal address | |
1704 | value. The address should *NOT* be preceded by "0x". | |
1705 | ||
1706 | The size of the memory transfer is not important when dealing with | |
1707 | cache lines (as long as no more than a cache line can be | |
1708 | transferred in a single operation :-), however more information | |
1709 | could be given following the dineroIII requirement to allow more | |
1710 | complete memory and cache simulators to provide better | |
1711 | results. i.e. the University of Pisa has a cache simulator that can | |
1712 | also take bus size and speed as (variable) inputs to calculate | |
1713 | complete system performance (a much more useful ability when trying | |
1714 | to construct an end product, rather than a processor). They | |
1715 | currently have an ARM version of their tool called ChARM. */ | |
1716 | ||
1717 | ||
1718 | void | |
1719 | dotrace (SIM_DESC sd, | |
1720 | sim_cpu *cpu, | |
1721 | FILE *tracefh, | |
1722 | int type, | |
1723 | SIM_ADDR address, | |
1724 | int width, | |
1725 | char *comment,...) | |
1726 | { | |
1727 | if (STATE & simTRACE) { | |
1728 | va_list ap; | |
1729 | fprintf(tracefh,"%d %s ; width %d ; ", | |
1730 | type, | |
1731 | pr_addr(address), | |
1732 | width); | |
1733 | va_start(ap,comment); | |
1734 | vfprintf(tracefh,comment,ap); | |
1735 | va_end(ap); | |
1736 | fprintf(tracefh,"\n"); | |
1737 | } | |
1738 | /* NOTE: Since the "din" format will only accept 32bit addresses, and | |
1739 | we may be generating 64bit ones, we should put the hi-32bits of the | |
1740 | address into the comment field. */ | |
1741 | ||
1742 | /* TODO: Provide a buffer for the trace lines. We can then avoid | |
1743 | performing writes until the buffer is filled, or the file is | |
1744 | being closed. */ | |
1745 | ||
1746 | /* NOTE: We could consider adding a comment field to the "din" file | |
1747 | produced using type 3 markers (unknown access). This would then | |
1748 | allow information about the program that the "din" is for, and | |
1749 | the MIPs world that was being simulated, to be placed into the | |
1750 | trace file. */ | |
1751 | ||
1752 | return; | |
1753 | } | |
29bc024d | 1754 | #endif /* WITH_TRACE_ANY_P */ |
c906108c SS |
1755 | |
1756 | /*---------------------------------------------------------------------------*/ | |
1757 | /*-- simulator engine -------------------------------------------------------*/ | |
1758 | /*---------------------------------------------------------------------------*/ | |
1759 | ||
1760 | static void | |
1761 | ColdReset (SIM_DESC sd) | |
1762 | { | |
1763 | int cpu_nr; | |
1764 | for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++) | |
1765 | { | |
1766 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); | |
1767 | /* RESET: Fixed PC address: */ | |
1768 | PC = (unsigned_word) UNSIGNED64 (0xFFFFFFFFBFC00000); | |
1769 | /* The reset vector address is in the unmapped, uncached memory space. */ | |
1770 | ||
1771 | SR &= ~(status_SR | status_TS | status_RP); | |
1772 | SR |= (status_ERL | status_BEV); | |
1773 | ||
1774 | /* Cheat and allow access to the complete register set immediately */ | |
1775 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT | |
1776 | && WITH_TARGET_WORD_BITSIZE == 64) | |
1777 | SR |= status_FR; /* 64bit registers */ | |
1778 | ||
1779 | /* Ensure that any instructions with pending register updates are | |
1780 | cleared: */ | |
1781 | PENDING_INVALIDATE(); | |
1782 | ||
1783 | /* Initialise the FPU registers to the unknown state */ | |
1784 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
1785 | { | |
1786 | int rn; | |
1787 | for (rn = 0; (rn < 32); rn++) | |
1788 | FPR_STATE[rn] = fmt_uninterpreted; | |
1789 | } | |
1790 | ||
07802d98 TS |
1791 | /* Initialise the Config0 register. */ |
1792 | C0_CONFIG = 0x80000000 /* Config1 present */ | |
1793 | | 2; /* KSEG0 uncached */ | |
1794 | if (WITH_TARGET_WORD_BITSIZE == 64) | |
1795 | { | |
1796 | /* FIXME Currently mips/sim-main.c:address_translation() | |
1797 | truncates all addresses to 32-bits. */ | |
1798 | if (0 && WITH_TARGET_ADDRESS_BITSIZE == 64) | |
1799 | C0_CONFIG |= (2 << 13); /* MIPS64, 64-bit addresses */ | |
1800 | else | |
1801 | C0_CONFIG |= (1 << 13); /* MIPS64, 32-bit addresses */ | |
1802 | } | |
1803 | if (BigEndianMem) | |
1804 | C0_CONFIG |= 0x00008000; /* Big Endian */ | |
c906108c SS |
1805 | } |
1806 | } | |
1807 | ||
1808 | ||
1809 | ||
1810 | ||
1811 | /* Description from page A-26 of the "MIPS IV Instruction Set" manual (revision 3.1) */ | |
1812 | /* Signal an exception condition. This will result in an exception | |
1813 | that aborts the instruction. The instruction operation pseudocode | |
1814 | will never see a return from this function call. */ | |
1815 | ||
1816 | void | |
1817 | signal_exception (SIM_DESC sd, | |
1818 | sim_cpu *cpu, | |
1819 | address_word cia, | |
1820 | int exception,...) | |
1821 | { | |
1822 | /* int vector; */ | |
1823 | ||
1824 | #ifdef DEBUG | |
1825 | sim_io_printf(sd,"DBG: SignalException(%d) PC = 0x%s\n",exception,pr_addr(cia)); | |
1826 | #endif /* DEBUG */ | |
1827 | ||
1828 | /* Ensure that any active atomic read/modify/write operation will fail: */ | |
1829 | LLBIT = 0; | |
1830 | ||
1831 | /* Save registers before interrupt dispatching */ | |
1832 | #ifdef SIM_CPU_EXCEPTION_TRIGGER | |
1833 | SIM_CPU_EXCEPTION_TRIGGER(sd, cpu, cia); | |
1834 | #endif | |
1835 | ||
1836 | switch (exception) { | |
1837 | ||
e80fc152 | 1838 | case DebugBreakPoint: |
c906108c SS |
1839 | if (! (Debug & Debug_DM)) |
1840 | { | |
1841 | if (INDELAYSLOT()) | |
1842 | { | |
1843 | CANCELDELAYSLOT(); | |
1844 | ||
1845 | Debug |= Debug_DBD; /* signaled from within in delay slot */ | |
1846 | DEPC = cia - 4; /* reference the branch instruction */ | |
1847 | } | |
1848 | else | |
1849 | { | |
1850 | Debug &= ~Debug_DBD; /* not signaled from within a delay slot */ | |
1851 | DEPC = cia; | |
1852 | } | |
1853 | ||
1854 | Debug |= Debug_DM; /* in debugging mode */ | |
1855 | Debug |= Debug_DBp; /* raising a DBp exception */ | |
1856 | PC = 0xBFC00200; | |
1857 | sim_engine_restart (SD, CPU, NULL, NULL_CIA); | |
1858 | } | |
1859 | break; | |
1860 | ||
e80fc152 | 1861 | case ReservedInstruction: |
c906108c SS |
1862 | { |
1863 | va_list ap; | |
1864 | unsigned int instruction; | |
1865 | va_start(ap,exception); | |
1866 | instruction = va_arg(ap,unsigned int); | |
1867 | va_end(ap); | |
1868 | /* Provide simple monitor support using ReservedInstruction | |
1869 | exceptions. The following code simulates the fixed vector | |
1870 | entry points into the IDT monitor by causing a simulator | |
1871 | trap, performing the monitor operation, and returning to | |
1872 | the address held in the $ra register (standard PCS return | |
1873 | address). This means we only need to pre-load the vector | |
1874 | space with suitable instruction values. For systems were | |
1875 | actual trap instructions are used, we would not need to | |
1876 | perform this magic. */ | |
1877 | if ((instruction & RSVD_INSTRUCTION_MASK) == RSVD_INSTRUCTION) | |
1878 | { | |
8030f857 BE |
1879 | int reason = (instruction >> RSVD_INSTRUCTION_ARG_SHIFT) & RSVD_INSTRUCTION_ARG_MASK; |
1880 | if (!sim_monitor (SD, CPU, cia, reason)) | |
1881 | sim_io_error (sd, "sim_monitor: unhandled reason = %d, pc = 0x%s\n", reason, pr_addr (cia)); | |
1882 | ||
c906108c SS |
1883 | /* NOTE: This assumes that a branch-and-link style |
1884 | instruction was used to enter the vector (which is the | |
1885 | case with the current IDT monitor). */ | |
1886 | sim_engine_restart (SD, CPU, NULL, RA); | |
1887 | } | |
1888 | /* Look for the mips16 entry and exit instructions, and | |
1889 | simulate a handler for them. */ | |
1890 | else if ((cia & 1) != 0 | |
1891 | && (instruction & 0xf81f) == 0xe809 | |
1892 | && (instruction & 0x0c0) != 0x0c0) | |
1893 | { | |
1894 | mips16_entry (SD, CPU, cia, instruction); | |
1895 | sim_engine_restart (sd, NULL, NULL, NULL_CIA); | |
1896 | } | |
1897 | /* else fall through to normal exception processing */ | |
1898 | sim_io_eprintf(sd,"ReservedInstruction at PC = 0x%s\n", pr_addr (cia)); | |
1899 | } | |
1900 | ||
1901 | default: | |
1902 | /* Store exception code into current exception id variable (used | |
1903 | by exit code): */ | |
1904 | ||
1905 | /* TODO: If not simulating exceptions then stop the simulator | |
1906 | execution. At the moment we always stop the simulation. */ | |
1907 | ||
1908 | #ifdef SUBTARGET_R3900 | |
1909 | /* update interrupt-related registers */ | |
1910 | ||
1911 | /* insert exception code in bits 6:2 */ | |
1912 | CAUSE = LSMASKED32(CAUSE, 31, 7) | LSINSERTED32(exception, 6, 2); | |
1913 | /* shift IE/KU history bits left */ | |
1914 | SR = LSMASKED32(SR, 31, 4) | LSINSERTED32(LSEXTRACTED32(SR, 3, 0), 5, 2); | |
1915 | ||
1916 | if (STATE & simDELAYSLOT) | |
1917 | { | |
1918 | STATE &= ~simDELAYSLOT; | |
1919 | CAUSE |= cause_BD; | |
1920 | EPC = (cia - 4); /* reference the branch instruction */ | |
1921 | } | |
1922 | else | |
1923 | EPC = cia; | |
1924 | ||
1925 | if (SR & status_BEV) | |
1926 | PC = (signed)0xBFC00000 + 0x180; | |
1927 | else | |
1928 | PC = (signed)0x80000000 + 0x080; | |
1929 | #else | |
1930 | /* See figure 5-17 for an outline of the code below */ | |
1931 | if (! (SR & status_EXL)) | |
1932 | { | |
1933 | CAUSE = (exception << 2); | |
1934 | if (STATE & simDELAYSLOT) | |
1935 | { | |
1936 | STATE &= ~simDELAYSLOT; | |
1937 | CAUSE |= cause_BD; | |
1938 | EPC = (cia - 4); /* reference the branch instruction */ | |
1939 | } | |
1940 | else | |
1941 | EPC = cia; | |
1942 | /* FIXME: TLB et.al. */ | |
1943 | /* vector = 0x180; */ | |
1944 | } | |
1945 | else | |
1946 | { | |
1947 | CAUSE = (exception << 2); | |
1948 | /* vector = 0x180; */ | |
1949 | } | |
1950 | SR |= status_EXL; | |
1951 | /* Store exception code into current exception id variable (used | |
1952 | by exit code): */ | |
1953 | ||
1954 | if (SR & status_BEV) | |
1955 | PC = (signed)0xBFC00200 + 0x180; | |
1956 | else | |
1957 | PC = (signed)0x80000000 + 0x180; | |
1958 | #endif | |
1959 | ||
1960 | switch ((CAUSE >> 2) & 0x1F) | |
1961 | { | |
1962 | case Interrupt: | |
1963 | /* Interrupts arrive during event processing, no need to | |
1964 | restart */ | |
1965 | return; | |
1966 | ||
1967 | case NMIReset: | |
1968 | /* Ditto */ | |
1969 | #ifdef SUBTARGET_3900 | |
1970 | /* Exception vector: BEV=0 BFC00000 / BEF=1 BFC00000 */ | |
1971 | PC = (signed)0xBFC00000; | |
0d3e762b | 1972 | #endif /* SUBTARGET_3900 */ |
c906108c SS |
1973 | return; |
1974 | ||
1975 | case TLBModification: | |
1976 | case TLBLoad: | |
1977 | case TLBStore: | |
1978 | case AddressLoad: | |
1979 | case AddressStore: | |
1980 | case InstructionFetch: | |
1981 | case DataReference: | |
1982 | /* The following is so that the simulator will continue from the | |
1983 | exception handler address. */ | |
1984 | sim_engine_halt (SD, CPU, NULL, PC, | |
1985 | sim_stopped, SIM_SIGBUS); | |
1986 | ||
1987 | case ReservedInstruction: | |
1988 | case CoProcessorUnusable: | |
1989 | PC = EPC; | |
1990 | sim_engine_halt (SD, CPU, NULL, PC, | |
1991 | sim_stopped, SIM_SIGILL); | |
1992 | ||
1993 | case IntegerOverflow: | |
1994 | case FPE: | |
1995 | sim_engine_halt (SD, CPU, NULL, PC, | |
1996 | sim_stopped, SIM_SIGFPE); | |
1997 | ||
1998 | case BreakPoint: | |
1999 | sim_engine_halt (SD, CPU, NULL, PC, sim_stopped, SIM_SIGTRAP); | |
2000 | break; | |
2001 | ||
2002 | case SystemCall: | |
2003 | case Trap: | |
2004 | sim_engine_restart (SD, CPU, NULL, PC); | |
2005 | break; | |
2006 | ||
2007 | case Watch: | |
2008 | PC = EPC; | |
2009 | sim_engine_halt (SD, CPU, NULL, PC, | |
2010 | sim_stopped, SIM_SIGTRAP); | |
2011 | ||
e80fc152 | 2012 | default: /* Unknown internal exception */ |
c906108c SS |
2013 | PC = EPC; |
2014 | sim_engine_halt (SD, CPU, NULL, PC, | |
2015 | sim_stopped, SIM_SIGABRT); | |
2016 | ||
2017 | } | |
2018 | ||
2019 | case SimulatorFault: | |
2020 | { | |
2021 | va_list ap; | |
2022 | char *msg; | |
2023 | va_start(ap,exception); | |
2024 | msg = va_arg(ap,char *); | |
2025 | va_end(ap); | |
2026 | sim_engine_abort (SD, CPU, NULL_CIA, | |
2027 | "FATAL: Simulator error \"%s\"\n",msg); | |
2028 | } | |
2029 | } | |
2030 | ||
2031 | return; | |
2032 | } | |
2033 | ||
2034 | ||
2035 | ||
402586aa CD |
2036 | /* This function implements what the MIPS32 and MIPS64 ISAs define as |
2037 | "UNPREDICTABLE" behaviour. | |
2038 | ||
2039 | About UNPREDICTABLE behaviour they say: "UNPREDICTABLE results | |
2040 | may vary from processor implementation to processor implementation, | |
2041 | instruction to instruction, or as a function of time on the same | |
2042 | implementation or instruction. Software can never depend on results | |
2043 | that are UNPREDICTABLE. ..." (MIPS64 Architecture for Programmers | |
2044 | Volume II, The MIPS64 Instruction Set. MIPS Document MD00087 revision | |
2045 | 0.95, page 2.) | |
2046 | ||
2047 | For UNPREDICTABLE behaviour, we print a message, if possible print | |
2048 | the offending instructions mips.igen instruction name (provided by | |
2049 | the caller), and stop the simulator. | |
2050 | ||
2051 | XXX FIXME: eventually, stopping the simulator should be made conditional | |
2052 | on a command-line option. */ | |
2053 | void | |
2054 | unpredictable_action(sim_cpu *cpu, address_word cia) | |
c906108c | 2055 | { |
402586aa CD |
2056 | SIM_DESC sd = CPU_STATE(cpu); |
2057 | ||
2058 | sim_io_eprintf(sd, "UNPREDICTABLE: PC = 0x%s\n", pr_addr (cia)); | |
2059 | sim_engine_halt (SD, CPU, NULL, cia, sim_stopped, SIM_SIGABRT); | |
c906108c | 2060 | } |
c906108c | 2061 | |
c906108c SS |
2062 | |
2063 | /*-- co-processor support routines ------------------------------------------*/ | |
2064 | ||
2065 | static int UNUSED | |
2066 | CoProcPresent(unsigned int coproc_number) | |
2067 | { | |
2068 | /* Return TRUE if simulator provides a model for the given co-processor number */ | |
2069 | return(0); | |
2070 | } | |
2071 | ||
2072 | void | |
2073 | cop_lw (SIM_DESC sd, | |
2074 | sim_cpu *cpu, | |
2075 | address_word cia, | |
2076 | int coproc_num, | |
2077 | int coproc_reg, | |
2078 | unsigned int memword) | |
2079 | { | |
2080 | switch (coproc_num) | |
2081 | { | |
2082 | case 1: | |
2083 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2084 | { | |
2085 | #ifdef DEBUG | |
2086 | printf("DBG: COP_LW: memword = 0x%08X (uword64)memword = 0x%s\n",memword,pr_addr(memword)); | |
2087 | #endif | |
14fb6c5a | 2088 | StoreFPR(coproc_reg,fmt_uninterpreted_32,(uword64)memword); |
c906108c SS |
2089 | break; |
2090 | } | |
2091 | ||
2092 | default: | |
2093 | #if 0 /* this should be controlled by a configuration option */ | |
2094 | sim_io_printf(sd,"COP_LW(%d,%d,0x%08X) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,memword,pr_addr(cia)); | |
2095 | #endif | |
2096 | break; | |
2097 | } | |
2098 | ||
2099 | return; | |
2100 | } | |
2101 | ||
2102 | void | |
2103 | cop_ld (SIM_DESC sd, | |
2104 | sim_cpu *cpu, | |
2105 | address_word cia, | |
2106 | int coproc_num, | |
2107 | int coproc_reg, | |
2108 | uword64 memword) | |
2109 | { | |
2110 | ||
2111 | #ifdef DEBUG | |
2112 | printf("DBG: COP_LD: coproc_num = %d, coproc_reg = %d, value = 0x%s : PC = 0x%s\n", coproc_num, coproc_reg, pr_uword64(memword), pr_addr(cia) ); | |
2113 | #endif | |
2114 | ||
2115 | switch (coproc_num) { | |
2116 | case 1: | |
2117 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2118 | { | |
14fb6c5a | 2119 | StoreFPR(coproc_reg,fmt_uninterpreted_64,memword); |
c906108c SS |
2120 | break; |
2121 | } | |
2122 | ||
2123 | default: | |
2124 | #if 0 /* this message should be controlled by a configuration option */ | |
2125 | sim_io_printf(sd,"COP_LD(%d,%d,0x%s) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(memword),pr_addr(cia)); | |
2126 | #endif | |
2127 | break; | |
2128 | } | |
2129 | ||
2130 | return; | |
2131 | } | |
2132 | ||
2133 | ||
2134 | ||
2135 | ||
2136 | unsigned int | |
2137 | cop_sw (SIM_DESC sd, | |
2138 | sim_cpu *cpu, | |
2139 | address_word cia, | |
2140 | int coproc_num, | |
2141 | int coproc_reg) | |
2142 | { | |
2143 | unsigned int value = 0; | |
2144 | ||
2145 | switch (coproc_num) | |
2146 | { | |
2147 | case 1: | |
2148 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2149 | { | |
14fb6c5a | 2150 | value = (unsigned int)ValueFPR(coproc_reg,fmt_uninterpreted_32); |
c906108c SS |
2151 | break; |
2152 | } | |
2153 | ||
2154 | default: | |
2155 | #if 0 /* should be controlled by configuration option */ | |
2156 | sim_io_printf(sd,"COP_SW(%d,%d) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(cia)); | |
2157 | #endif | |
2158 | break; | |
2159 | } | |
2160 | ||
2161 | return(value); | |
2162 | } | |
2163 | ||
2164 | uword64 | |
2165 | cop_sd (SIM_DESC sd, | |
2166 | sim_cpu *cpu, | |
2167 | address_word cia, | |
2168 | int coproc_num, | |
2169 | int coproc_reg) | |
2170 | { | |
2171 | uword64 value = 0; | |
2172 | switch (coproc_num) | |
2173 | { | |
2174 | case 1: | |
2175 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2176 | { | |
14fb6c5a | 2177 | value = ValueFPR(coproc_reg,fmt_uninterpreted_64); |
c906108c SS |
2178 | break; |
2179 | } | |
2180 | ||
2181 | default: | |
2182 | #if 0 /* should be controlled by configuration option */ | |
2183 | sim_io_printf(sd,"COP_SD(%d,%d) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(cia)); | |
2184 | #endif | |
2185 | break; | |
2186 | } | |
2187 | ||
2188 | return(value); | |
2189 | } | |
2190 | ||
2191 | ||
2192 | ||
2193 | ||
2194 | void | |
2195 | decode_coproc (SIM_DESC sd, | |
2196 | sim_cpu *cpu, | |
2197 | address_word cia, | |
8e394ffc AB |
2198 | unsigned int instruction, |
2199 | int coprocnum, | |
2200 | CP0_operation op, | |
2201 | int rt, | |
2202 | int rd, | |
2203 | int sel) | |
c906108c | 2204 | { |
c906108c SS |
2205 | switch (coprocnum) |
2206 | { | |
2207 | case 0: /* standard CPU control and cache registers */ | |
2208 | { | |
c906108c SS |
2209 | /* R4000 Users Manual (second edition) lists the following CP0 |
2210 | instructions: | |
2211 | CODE><-RT><RD-><--TAIL---> | |
2212 | DMFC0 Doubleword Move From CP0 (VR4100 = 01000000001tttttddddd00000000000) | |
2213 | DMTC0 Doubleword Move To CP0 (VR4100 = 01000000101tttttddddd00000000000) | |
2214 | MFC0 word Move From CP0 (VR4100 = 01000000000tttttddddd00000000000) | |
2215 | MTC0 word Move To CP0 (VR4100 = 01000000100tttttddddd00000000000) | |
2216 | TLBR Read Indexed TLB Entry (VR4100 = 01000010000000000000000000000001) | |
2217 | TLBWI Write Indexed TLB Entry (VR4100 = 01000010000000000000000000000010) | |
2218 | TLBWR Write Random TLB Entry (VR4100 = 01000010000000000000000000000110) | |
2219 | TLBP Probe TLB for Matching Entry (VR4100 = 01000010000000000000000000001000) | |
2220 | CACHE Cache operation (VR4100 = 101111bbbbbpppppiiiiiiiiiiiiiiii) | |
2221 | ERET Exception return (VR4100 = 01000010000000000000000000011000) | |
2222 | */ | |
8e394ffc AB |
2223 | if (((op == cp0_mfc0) || (op == cp0_mtc0) /* MFC0 / MTC0 */ |
2224 | || (op == cp0_dmfc0) || (op == cp0_dmtc0)) /* DMFC0 / DMTC0 */ | |
2225 | && sel == 0) | |
c906108c | 2226 | { |
c906108c SS |
2227 | switch (rd) /* NOTEs: Standard CP0 registers */ |
2228 | { | |
2229 | /* 0 = Index R4000 VR4100 VR4300 */ | |
2230 | /* 1 = Random R4000 VR4100 VR4300 */ | |
2231 | /* 2 = EntryLo0 R4000 VR4100 VR4300 */ | |
2232 | /* 3 = EntryLo1 R4000 VR4100 VR4300 */ | |
2233 | /* 4 = Context R4000 VR4100 VR4300 */ | |
2234 | /* 5 = PageMask R4000 VR4100 VR4300 */ | |
2235 | /* 6 = Wired R4000 VR4100 VR4300 */ | |
2236 | /* 8 = BadVAddr R4000 VR4100 VR4300 */ | |
2237 | /* 9 = Count R4000 VR4100 VR4300 */ | |
2238 | /* 10 = EntryHi R4000 VR4100 VR4300 */ | |
2239 | /* 11 = Compare R4000 VR4100 VR4300 */ | |
2240 | /* 12 = SR R4000 VR4100 VR4300 */ | |
2241 | #ifdef SUBTARGET_R3900 | |
2242 | case 3: | |
2243 | /* 3 = Config R3900 */ | |
2244 | case 7: | |
2245 | /* 7 = Cache R3900 */ | |
2246 | case 15: | |
2247 | /* 15 = PRID R3900 */ | |
2248 | ||
2249 | /* ignore */ | |
2250 | break; | |
2251 | ||
2252 | case 8: | |
2253 | /* 8 = BadVAddr R4000 VR4100 VR4300 */ | |
8e394ffc | 2254 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
1a27f959 | 2255 | GPR[rt] = (signed_word) (signed_address) COP0_BADVADDR; |
c906108c SS |
2256 | else |
2257 | COP0_BADVADDR = GPR[rt]; | |
2258 | break; | |
2259 | ||
2260 | #endif /* SUBTARGET_R3900 */ | |
2261 | case 12: | |
8e394ffc | 2262 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2263 | GPR[rt] = SR; |
2264 | else | |
2265 | SR = GPR[rt]; | |
2266 | break; | |
2267 | /* 13 = Cause R4000 VR4100 VR4300 */ | |
2268 | case 13: | |
8e394ffc | 2269 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2270 | GPR[rt] = CAUSE; |
2271 | else | |
2272 | CAUSE = GPR[rt]; | |
2273 | break; | |
2274 | /* 14 = EPC R4000 VR4100 VR4300 */ | |
2275 | case 14: | |
8e394ffc | 2276 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2277 | GPR[rt] = (signed_word) (signed_address) EPC; |
2278 | else | |
2279 | EPC = GPR[rt]; | |
2280 | break; | |
2281 | /* 15 = PRId R4000 VR4100 VR4300 */ | |
2282 | #ifdef SUBTARGET_R3900 | |
2283 | /* 16 = Debug */ | |
2284 | case 16: | |
8e394ffc | 2285 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2286 | GPR[rt] = Debug; |
2287 | else | |
2288 | Debug = GPR[rt]; | |
2289 | break; | |
2290 | #else | |
2291 | /* 16 = Config R4000 VR4100 VR4300 */ | |
2292 | case 16: | |
8e394ffc | 2293 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
07802d98 TS |
2294 | GPR[rt] = C0_CONFIG; |
2295 | else | |
2296 | /* only bottom three bits are writable */ | |
2297 | C0_CONFIG = (C0_CONFIG & ~0x7) | (GPR[rt] & 0x7); | |
c906108c SS |
2298 | break; |
2299 | #endif | |
2300 | #ifdef SUBTARGET_R3900 | |
2301 | /* 17 = Debug */ | |
2302 | case 17: | |
8e394ffc | 2303 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2304 | GPR[rt] = DEPC; |
2305 | else | |
2306 | DEPC = GPR[rt]; | |
2307 | break; | |
2308 | #else | |
2309 | /* 17 = LLAddr R4000 VR4100 VR4300 */ | |
2310 | #endif | |
2311 | /* 18 = WatchLo R4000 VR4100 VR4300 */ | |
2312 | /* 19 = WatchHi R4000 VR4100 VR4300 */ | |
2313 | /* 20 = XContext R4000 VR4100 VR4300 */ | |
2314 | /* 26 = PErr or ECC R4000 VR4100 VR4300 */ | |
2315 | /* 27 = CacheErr R4000 VR4100 */ | |
2316 | /* 28 = TagLo R4000 VR4100 VR4300 */ | |
2317 | /* 29 = TagHi R4000 VR4100 VR4300 */ | |
2318 | /* 30 = ErrorEPC R4000 VR4100 VR4300 */ | |
a3027dd7 FCE |
2319 | if (STATE_VERBOSE_P(SD)) |
2320 | sim_io_eprintf (SD, | |
e30db738 AC |
2321 | "Warning: PC 0x%lx:interp.c decode_coproc DEADC0DE\n", |
2322 | (unsigned long)cia); | |
c906108c SS |
2323 | GPR[rt] = 0xDEADC0DE; /* CPR[0,rd] */ |
2324 | /* CPR[0,rd] = GPR[rt]; */ | |
2325 | default: | |
8e394ffc | 2326 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2327 | GPR[rt] = (signed_word) (signed32) COP0_GPR[rd]; |
2328 | else | |
2329 | COP0_GPR[rd] = GPR[rt]; | |
2330 | #if 0 | |
2331 | if (code == 0x00) | |
2332 | sim_io_printf(sd,"Warning: MFC0 %d,%d ignored, PC=%08x (architecture specific)\n",rt,rd, (unsigned)cia); | |
2333 | else | |
2334 | sim_io_printf(sd,"Warning: MTC0 %d,%d ignored, PC=%08x (architecture specific)\n",rt,rd, (unsigned)cia); | |
2335 | #endif | |
2336 | } | |
2337 | } | |
8e394ffc | 2338 | else if ((op == cp0_mfc0 || op == cp0_dmfc0) |
07802d98 TS |
2339 | && rd == 16) |
2340 | { | |
2341 | /* [D]MFC0 RT,C0_CONFIG,SEL */ | |
2342 | signed32 cfg = 0; | |
8e394ffc | 2343 | switch (sel) |
07802d98 TS |
2344 | { |
2345 | case 0: | |
2346 | cfg = C0_CONFIG; | |
2347 | break; | |
2348 | case 1: | |
2349 | /* MIPS32 r/o Config1: | |
2350 | Config2 present */ | |
2351 | cfg = 0x80000000; | |
2352 | /* MIPS16 implemented. | |
2353 | XXX How to check configuration? */ | |
2354 | cfg |= 0x0000004; | |
2355 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2356 | /* MDMX & FPU implemented */ | |
2357 | cfg |= 0x00000021; | |
2358 | break; | |
2359 | case 2: | |
2360 | /* MIPS32 r/o Config2: | |
2361 | Config3 present. */ | |
2362 | cfg = 0x80000000; | |
2363 | break; | |
2364 | case 3: | |
2365 | /* MIPS32 r/o Config3: | |
2366 | SmartMIPS implemented. */ | |
2367 | cfg = 0x00000002; | |
2368 | break; | |
2369 | } | |
2370 | GPR[rt] = cfg; | |
2371 | } | |
8e394ffc | 2372 | else if (op == cp0_eret && sel == 0x18) |
c906108c SS |
2373 | { |
2374 | /* ERET */ | |
2375 | if (SR & status_ERL) | |
2376 | { | |
2377 | /* Oops, not yet available */ | |
2378 | sim_io_printf(sd,"Warning: ERET when SR[ERL] set not handled yet"); | |
2379 | PC = EPC; | |
2380 | SR &= ~status_ERL; | |
2381 | } | |
2382 | else | |
2383 | { | |
2384 | PC = EPC; | |
2385 | SR &= ~status_EXL; | |
2386 | } | |
2387 | } | |
8e394ffc | 2388 | else if (op == cp0_rfe && sel == 0x10) |
c906108c SS |
2389 | { |
2390 | /* RFE */ | |
2391 | #ifdef SUBTARGET_R3900 | |
2392 | /* TX39: Copy IEp/KUp -> IEc/KUc, and IEo/KUo -> IEp/KUp */ | |
2393 | ||
2394 | /* shift IE/KU history bits right */ | |
2395 | SR = LSMASKED32(SR, 31, 4) | LSINSERTED32(LSEXTRACTED32(SR, 5, 2), 3, 0); | |
2396 | ||
2397 | /* TODO: CACHE register */ | |
2398 | #endif /* SUBTARGET_R3900 */ | |
2399 | } | |
8e394ffc | 2400 | else if (op == cp0_deret && sel == 0x1F) |
c906108c SS |
2401 | { |
2402 | /* DERET */ | |
2403 | Debug &= ~Debug_DM; | |
2404 | DELAYSLOT(); | |
2405 | DSPC = DEPC; | |
2406 | } | |
2407 | else | |
2408 | sim_io_eprintf(sd,"Unrecognised COP0 instruction 0x%08X at PC = 0x%s : No handler present\n",instruction,pr_addr(cia)); | |
2409 | /* TODO: When executing an ERET or RFE instruction we should | |
2410 | clear LLBIT, to ensure that any out-standing atomic | |
2411 | read/modify/write sequence fails. */ | |
2412 | } | |
2413 | break; | |
2414 | ||
2415 | case 2: /* co-processor 2 */ | |
2416 | { | |
2417 | int handle = 0; | |
2418 | ||
2419 | ||
2420 | if(! handle) | |
2421 | { | |
2422 | sim_io_eprintf(sd, "COP2 instruction 0x%08X at PC = 0x%s : No handler present\n", | |
2423 | instruction,pr_addr(cia)); | |
2424 | } | |
2425 | } | |
2426 | break; | |
2427 | ||
2428 | case 1: /* should not occur (FPU co-processor) */ | |
2429 | case 3: /* should not occur (FPU co-processor) */ | |
2430 | SignalException(ReservedInstruction,instruction); | |
2431 | break; | |
2432 | } | |
2433 | ||
2434 | return; | |
2435 | } | |
2436 | ||
2437 | ||
2438 | /* This code copied from gdb's utils.c. Would like to share this code, | |
2439 | but don't know of a common place where both could get to it. */ | |
2440 | ||
2441 | /* Temporary storage using circular buffer */ | |
2442 | #define NUMCELLS 16 | |
2443 | #define CELLSIZE 32 | |
2444 | static char* | |
2445 | get_cell (void) | |
2446 | { | |
2447 | static char buf[NUMCELLS][CELLSIZE]; | |
2448 | static int cell=0; | |
2449 | if (++cell>=NUMCELLS) cell=0; | |
2450 | return buf[cell]; | |
2451 | } | |
2452 | ||
2453 | /* Print routines to handle variable size regs, etc */ | |
2454 | ||
2455 | /* Eliminate warning from compiler on 32-bit systems */ | |
2456 | static int thirty_two = 32; | |
2457 | ||
2458 | char* | |
8ac57fbd | 2459 | pr_addr (SIM_ADDR addr) |
c906108c SS |
2460 | { |
2461 | char *paddr_str=get_cell(); | |
2462 | switch (sizeof(addr)) | |
2463 | { | |
2464 | case 8: | |
2465 | sprintf(paddr_str,"%08lx%08lx", | |
2466 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); | |
2467 | break; | |
2468 | case 4: | |
2469 | sprintf(paddr_str,"%08lx",(unsigned long)addr); | |
2470 | break; | |
2471 | case 2: | |
2472 | sprintf(paddr_str,"%04x",(unsigned short)(addr&0xffff)); | |
2473 | break; | |
2474 | default: | |
2475 | sprintf(paddr_str,"%x",addr); | |
2476 | } | |
2477 | return paddr_str; | |
2478 | } | |
2479 | ||
2480 | char* | |
8ac57fbd | 2481 | pr_uword64 (uword64 addr) |
c906108c SS |
2482 | { |
2483 | char *paddr_str=get_cell(); | |
2484 | sprintf(paddr_str,"%08lx%08lx", | |
2485 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); | |
2486 | return paddr_str; | |
2487 | } | |
2488 | ||
2489 | ||
2490 | void | |
2491 | mips_core_signal (SIM_DESC sd, | |
2492 | sim_cpu *cpu, | |
2493 | sim_cia cia, | |
2494 | unsigned map, | |
2495 | int nr_bytes, | |
2496 | address_word addr, | |
2497 | transfer_type transfer, | |
2498 | sim_core_signals sig) | |
2499 | { | |
2500 | const char *copy = (transfer == read_transfer ? "read" : "write"); | |
2501 | address_word ip = CIA_ADDR (cia); | |
2502 | ||
2503 | switch (sig) | |
2504 | { | |
2505 | case sim_core_unmapped_signal: | |
2506 | sim_io_eprintf (sd, "mips-core: %d byte %s to unmapped address 0x%lx at 0x%lx\n", | |
2507 | nr_bytes, copy, | |
2508 | (unsigned long) addr, (unsigned long) ip); | |
2509 | COP0_BADVADDR = addr; | |
2510 | SignalExceptionDataReference(); | |
2511 | break; | |
2512 | ||
2513 | case sim_core_unaligned_signal: | |
2514 | sim_io_eprintf (sd, "mips-core: %d byte %s to unaligned address 0x%lx at 0x%lx\n", | |
2515 | nr_bytes, copy, | |
2516 | (unsigned long) addr, (unsigned long) ip); | |
2517 | COP0_BADVADDR = addr; | |
2518 | if(transfer == read_transfer) | |
2519 | SignalExceptionAddressLoad(); | |
2520 | else | |
2521 | SignalExceptionAddressStore(); | |
2522 | break; | |
2523 | ||
2524 | default: | |
2525 | sim_engine_abort (sd, cpu, cia, | |
2526 | "mips_core_signal - internal error - bad switch"); | |
2527 | } | |
2528 | } | |
2529 | ||
2530 | ||
2531 | void | |
2532 | mips_cpu_exception_trigger(SIM_DESC sd, sim_cpu* cpu, address_word cia) | |
2533 | { | |
2534 | ASSERT(cpu != NULL); | |
2535 | ||
2536 | if(cpu->exc_suspended > 0) | |
2537 | sim_io_eprintf(sd, "Warning, nested exception triggered (%d)\n", cpu->exc_suspended); | |
2538 | ||
2539 | PC = cia; | |
2540 | memcpy(cpu->exc_trigger_registers, cpu->registers, sizeof(cpu->exc_trigger_registers)); | |
2541 | cpu->exc_suspended = 0; | |
2542 | } | |
2543 | ||
2544 | void | |
2545 | mips_cpu_exception_suspend(SIM_DESC sd, sim_cpu* cpu, int exception) | |
2546 | { | |
2547 | ASSERT(cpu != NULL); | |
2548 | ||
2549 | if(cpu->exc_suspended > 0) | |
2550 | sim_io_eprintf(sd, "Warning, nested exception signal (%d then %d)\n", | |
2551 | cpu->exc_suspended, exception); | |
2552 | ||
2553 | memcpy(cpu->exc_suspend_registers, cpu->registers, sizeof(cpu->exc_suspend_registers)); | |
2554 | memcpy(cpu->registers, cpu->exc_trigger_registers, sizeof(cpu->registers)); | |
2555 | cpu->exc_suspended = exception; | |
2556 | } | |
2557 | ||
2558 | void | |
2559 | mips_cpu_exception_resume(SIM_DESC sd, sim_cpu* cpu, int exception) | |
2560 | { | |
2561 | ASSERT(cpu != NULL); | |
2562 | ||
2563 | if(exception == 0 && cpu->exc_suspended > 0) | |
2564 | { | |
2565 | /* warn not for breakpoints */ | |
2566 | if(cpu->exc_suspended != sim_signal_to_host(sd, SIM_SIGTRAP)) | |
2567 | sim_io_eprintf(sd, "Warning, resuming but ignoring pending exception signal (%d)\n", | |
2568 | cpu->exc_suspended); | |
2569 | } | |
2570 | else if(exception != 0 && cpu->exc_suspended > 0) | |
2571 | { | |
2572 | if(exception != cpu->exc_suspended) | |
2573 | sim_io_eprintf(sd, "Warning, resuming with mismatched exception signal (%d vs %d)\n", | |
2574 | cpu->exc_suspended, exception); | |
2575 | ||
2576 | memcpy(cpu->registers, cpu->exc_suspend_registers, sizeof(cpu->registers)); | |
2577 | } | |
2578 | else if(exception != 0 && cpu->exc_suspended == 0) | |
2579 | { | |
2580 | sim_io_eprintf(sd, "Warning, ignoring spontanous exception signal (%d)\n", exception); | |
2581 | } | |
2582 | cpu->exc_suspended = 0; | |
2583 | } | |
2584 | ||
2585 | ||
2586 | /*---------------------------------------------------------------------------*/ | |
2587 | /*> EOF interp.c <*/ |