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 | ||
a6ff997c | 25 | #include "config.h" |
c906108c SS |
26 | #include "bfd.h" |
27 | #include "sim-main.h" | |
28 | #include "sim-utils.h" | |
29 | #include "sim-options.h" | |
30 | #include "sim-assert.h" | |
31 | #include "sim-hw.h" | |
32 | ||
33 | #include "itable.h" | |
34 | ||
35 | ||
36 | #include "config.h" | |
37 | ||
38 | #include <stdio.h> | |
39 | #include <stdarg.h> | |
40 | #include <ansidecl.h> | |
41 | #include <ctype.h> | |
42 | #include <limits.h> | |
43 | #include <math.h> | |
44 | #ifdef HAVE_STDLIB_H | |
45 | #include <stdlib.h> | |
46 | #endif | |
47 | #ifdef HAVE_STRING_H | |
48 | #include <string.h> | |
49 | #else | |
50 | #ifdef HAVE_STRINGS_H | |
51 | #include <strings.h> | |
52 | #endif | |
53 | #endif | |
54 | ||
55 | #include "getopt.h" | |
56 | #include "libiberty.h" | |
57 | #include "bfd.h" | |
3c25f8c7 AC |
58 | #include "gdb/callback.h" /* GDB simulator callback interface */ |
59 | #include "gdb/remote-sim.h" /* GDB simulator interface */ | |
c906108c | 60 | |
bdca5ee4 TT |
61 | char* pr_addr (SIM_ADDR addr); |
62 | char* pr_uword64 (uword64 addr); | |
c906108c SS |
63 | |
64 | ||
65 | /* Within interp.c we refer to the sim_state and sim_cpu directly. */ | |
66 | #define CPU cpu | |
67 | #define SD sd | |
68 | ||
69 | ||
70 | /* The following reserved instruction value is used when a simulator | |
71 | trap is required. NOTE: Care must be taken, since this value may be | |
72 | used in later revisions of the MIPS ISA. */ | |
73 | ||
8e394ffc | 74 | #define RSVD_INSTRUCTION (0x00000039) |
c906108c SS |
75 | #define RSVD_INSTRUCTION_MASK (0xFC00003F) |
76 | ||
77 | #define RSVD_INSTRUCTION_ARG_SHIFT 6 | |
78 | #define RSVD_INSTRUCTION_ARG_MASK 0xFFFFF | |
79 | ||
80 | ||
81 | /* Bits in the Debug register */ | |
82 | #define Debug_DBD 0x80000000 /* Debug Branch Delay */ | |
83 | #define Debug_DM 0x40000000 /* Debug Mode */ | |
84 | #define Debug_DBp 0x00000002 /* Debug Breakpoint indicator */ | |
85 | ||
86 | /*---------------------------------------------------------------------------*/ | |
87 | /*-- GDB simulator interface ------------------------------------------------*/ | |
88 | /*---------------------------------------------------------------------------*/ | |
89 | ||
bdca5ee4 | 90 | static void ColdReset (SIM_DESC sd); |
c906108c SS |
91 | |
92 | /*---------------------------------------------------------------------------*/ | |
93 | ||
94 | ||
95 | ||
96 | #define DELAYSLOT() {\ | |
97 | if (STATE & simDELAYSLOT)\ | |
98 | sim_io_eprintf(sd,"Delay slot already activated (branch in delay slot?)\n");\ | |
99 | STATE |= simDELAYSLOT;\ | |
100 | } | |
101 | ||
102 | #define JALDELAYSLOT() {\ | |
103 | DELAYSLOT ();\ | |
104 | STATE |= simJALDELAYSLOT;\ | |
105 | } | |
106 | ||
107 | #define NULLIFY() {\ | |
108 | STATE &= ~simDELAYSLOT;\ | |
109 | STATE |= simSKIPNEXT;\ | |
110 | } | |
111 | ||
112 | #define CANCELDELAYSLOT() {\ | |
113 | DSSTATE = 0;\ | |
114 | STATE &= ~(simDELAYSLOT | simJALDELAYSLOT);\ | |
115 | } | |
116 | ||
117 | #define INDELAYSLOT() ((STATE & simDELAYSLOT) != 0) | |
118 | #define INJALDELAYSLOT() ((STATE & simJALDELAYSLOT) != 0) | |
119 | ||
adf40b2e JM |
120 | /* Note that the monitor code essentially assumes this layout of memory. |
121 | If you change these, change the monitor code, too. */ | |
14fb6c5a TS |
122 | /* FIXME Currently addresses are truncated to 32-bits, see |
123 | mips/sim-main.c:address_translation(). If that changes, then these | |
124 | values will need to be extended, and tested for more carefully. */ | |
c906108c SS |
125 | #define K0BASE (0x80000000) |
126 | #define K0SIZE (0x20000000) | |
127 | #define K1BASE (0xA0000000) | |
128 | #define K1SIZE (0x20000000) | |
adf40b2e JM |
129 | |
130 | /* Simple run-time monitor support. | |
131 | ||
132 | We emulate the monitor by placing magic reserved instructions at | |
133 | the monitor's entry points; when we hit these instructions, instead | |
134 | of raising an exception (as we would normally), we look at the | |
135 | instruction and perform the appropriate monitory operation. | |
136 | ||
137 | `*_monitor_base' are the physical addresses at which the corresponding | |
138 | monitor vectors are located. `0' means none. By default, | |
139 | install all three. | |
140 | The RSVD_INSTRUCTION... macros specify the magic instructions we | |
141 | use at the monitor entry points. */ | |
142 | static int firmware_option_p = 0; | |
143 | static SIM_ADDR idt_monitor_base = 0xBFC00000; | |
144 | static SIM_ADDR pmon_monitor_base = 0xBFC00500; | |
145 | static SIM_ADDR lsipmon_monitor_base = 0xBFC00200; | |
146 | ||
147 | static SIM_RC sim_firmware_command (SIM_DESC sd, char* arg); | |
148 | ||
c8847145 | 149 | #define MEM_SIZE (8 << 20) /* 8 MBytes */ |
c906108c SS |
150 | |
151 | ||
29bc024d | 152 | #if WITH_TRACE_ANY_P |
c906108c SS |
153 | static char *tracefile = "trace.din"; /* default filename for trace log */ |
154 | FILE *tracefh = NULL; | |
bdca5ee4 | 155 | static void open_trace (SIM_DESC sd); |
29bc024d MF |
156 | #else |
157 | #define open_trace(sd) | |
158 | #endif | |
c906108c SS |
159 | |
160 | static const char * get_insn_name (sim_cpu *, int); | |
161 | ||
162 | /* simulation target board. NULL=canonical */ | |
163 | static char* board = NULL; | |
164 | ||
165 | ||
166 | static DECLARE_OPTION_HANDLER (mips_option_handler); | |
167 | ||
168 | enum { | |
169 | OPTION_DINERO_TRACE = OPTION_START, | |
170 | OPTION_DINERO_FILE, | |
adf40b2e | 171 | OPTION_FIRMWARE, |
2525df03 | 172 | OPTION_INFO_MEMORY, |
c906108c SS |
173 | OPTION_BOARD |
174 | }; | |
175 | ||
2525df03 | 176 | static int display_mem_info = 0; |
c906108c SS |
177 | |
178 | static SIM_RC | |
8ac57fbd MF |
179 | mips_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt, char *arg, |
180 | int is_command) | |
c906108c SS |
181 | { |
182 | int cpu_nr; | |
183 | switch (opt) | |
184 | { | |
185 | case OPTION_DINERO_TRACE: /* ??? */ | |
29bc024d | 186 | #if WITH_TRACE_ANY_P |
c906108c SS |
187 | /* Eventually the simTRACE flag could be treated as a toggle, to |
188 | allow external control of the program points being traced | |
189 | (i.e. only from main onwards, excluding the run-time setup, | |
190 | etc.). */ | |
191 | for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++) | |
192 | { | |
193 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); | |
194 | if (arg == NULL) | |
195 | STATE |= simTRACE; | |
196 | else if (strcmp (arg, "yes") == 0) | |
197 | STATE |= simTRACE; | |
198 | else if (strcmp (arg, "no") == 0) | |
199 | STATE &= ~simTRACE; | |
200 | else if (strcmp (arg, "on") == 0) | |
201 | STATE |= simTRACE; | |
202 | else if (strcmp (arg, "off") == 0) | |
203 | STATE &= ~simTRACE; | |
204 | else | |
205 | { | |
206 | fprintf (stderr, "Unrecognized dinero-trace option `%s'\n", arg); | |
207 | return SIM_RC_FAIL; | |
208 | } | |
209 | } | |
210 | return SIM_RC_OK; | |
29bc024d | 211 | #else /* !WITH_TRACE_ANY_P */ |
c906108c SS |
212 | fprintf(stderr,"\ |
213 | Simulator constructed without dinero tracing support (for performance).\n\ | |
29bc024d | 214 | Re-compile simulator with \"-DWITH_TRACE_ANY_P\" to enable this option.\n"); |
c906108c | 215 | return SIM_RC_FAIL; |
29bc024d | 216 | #endif /* !WITH_TRACE_ANY_P */ |
c906108c SS |
217 | |
218 | case OPTION_DINERO_FILE: | |
29bc024d | 219 | #if WITH_TRACE_ANY_P |
c906108c SS |
220 | if (optarg != NULL) { |
221 | char *tmp; | |
222 | tmp = (char *)malloc(strlen(optarg) + 1); | |
223 | if (tmp == NULL) | |
224 | { | |
225 | sim_io_printf(sd,"Failed to allocate buffer for tracefile name \"%s\"\n",optarg); | |
226 | return SIM_RC_FAIL; | |
227 | } | |
228 | else { | |
229 | strcpy(tmp,optarg); | |
230 | tracefile = tmp; | |
231 | sim_io_printf(sd,"Placing trace information into file \"%s\"\n",tracefile); | |
232 | } | |
233 | } | |
29bc024d | 234 | #endif /* WITH_TRACE_ANY_P */ |
c906108c SS |
235 | return SIM_RC_OK; |
236 | ||
adf40b2e JM |
237 | case OPTION_FIRMWARE: |
238 | return sim_firmware_command (sd, arg); | |
239 | ||
c906108c SS |
240 | case OPTION_BOARD: |
241 | { | |
242 | if (arg) | |
243 | { | |
244 | board = zalloc(strlen(arg) + 1); | |
245 | strcpy(board, arg); | |
246 | } | |
247 | return SIM_RC_OK; | |
248 | } | |
2525df03 NC |
249 | |
250 | case OPTION_INFO_MEMORY: | |
251 | display_mem_info = 1; | |
252 | break; | |
c906108c SS |
253 | } |
254 | ||
255 | return SIM_RC_OK; | |
256 | } | |
257 | ||
258 | ||
259 | static const OPTION mips_options[] = | |
260 | { | |
261 | { {"dinero-trace", optional_argument, NULL, OPTION_DINERO_TRACE}, | |
262 | '\0', "on|off", "Enable dinero tracing", | |
263 | mips_option_handler }, | |
264 | { {"dinero-file", required_argument, NULL, OPTION_DINERO_FILE}, | |
265 | '\0', "FILE", "Write dinero trace to FILE", | |
266 | mips_option_handler }, | |
adf40b2e JM |
267 | { {"firmware", required_argument, NULL, OPTION_FIRMWARE}, |
268 | '\0', "[idt|pmon|lsipmon|none][@ADDRESS]", "Emulate ROM monitor", | |
269 | mips_option_handler }, | |
c906108c SS |
270 | { {"board", required_argument, NULL, OPTION_BOARD}, |
271 | '\0', "none" /* rely on compile-time string concatenation for other options */ | |
272 | ||
273 | #define BOARD_JMR3904 "jmr3904" | |
274 | "|" BOARD_JMR3904 | |
275 | #define BOARD_JMR3904_PAL "jmr3904pal" | |
276 | "|" BOARD_JMR3904_PAL | |
277 | #define BOARD_JMR3904_DEBUG "jmr3904debug" | |
278 | "|" BOARD_JMR3904_DEBUG | |
43e526b9 JM |
279 | #define BOARD_BSP "bsp" |
280 | "|" BOARD_BSP | |
c906108c SS |
281 | |
282 | , "Customize simulation for a particular board.", mips_option_handler }, | |
283 | ||
2525df03 NC |
284 | /* These next two options have the same names as ones found in the |
285 | memory_options[] array in common/sim-memopt.c. This is because | |
286 | the intention is to provide an alternative handler for those two | |
287 | options. We need an alternative handler because the memory | |
288 | regions are not set up until after the command line arguments | |
289 | have been parsed, and so we cannot display the memory info whilst | |
290 | processing the command line. There is a hack in sim_open to | |
291 | remove these handlers when we want the real --memory-info option | |
292 | to work. */ | |
293 | { { "info-memory", no_argument, NULL, OPTION_INFO_MEMORY }, | |
294 | '\0', NULL, "List configured memory regions", mips_option_handler }, | |
295 | { { "memory-info", no_argument, NULL, OPTION_INFO_MEMORY }, | |
296 | '\0', NULL, NULL, mips_option_handler }, | |
297 | ||
c906108c SS |
298 | { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL } |
299 | }; | |
300 | ||
301 | ||
302 | int interrupt_pending; | |
303 | ||
304 | void | |
305 | interrupt_event (SIM_DESC sd, void *data) | |
306 | { | |
307 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ | |
034685f9 | 308 | address_word cia = CPU_PC_GET (cpu); |
c906108c SS |
309 | if (SR & status_IE) |
310 | { | |
311 | interrupt_pending = 0; | |
312 | SignalExceptionInterrupt (1); /* interrupt "1" */ | |
313 | } | |
314 | else if (!interrupt_pending) | |
315 | sim_events_schedule (sd, 1, interrupt_event, data); | |
316 | } | |
317 | ||
318 | ||
319 | /*---------------------------------------------------------------------------*/ | |
320 | /*-- Device registration hook -----------------------------------------------*/ | |
321 | /*---------------------------------------------------------------------------*/ | |
322 | static void device_init(SIM_DESC sd) { | |
323 | #ifdef DEVICE_INIT | |
324 | extern void register_devices(SIM_DESC); | |
325 | register_devices(sd); | |
326 | #endif | |
327 | } | |
328 | ||
329 | /*---------------------------------------------------------------------------*/ | |
330 | /*-- GDB simulator interface ------------------------------------------------*/ | |
331 | /*---------------------------------------------------------------------------*/ | |
332 | ||
7bebb329 MF |
333 | static sim_cia |
334 | mips_pc_get (sim_cpu *cpu) | |
335 | { | |
336 | return PC; | |
337 | } | |
338 | ||
339 | static void | |
340 | mips_pc_set (sim_cpu *cpu, sim_cia pc) | |
341 | { | |
342 | PC = pc; | |
343 | } | |
344 | ||
e1211e55 MF |
345 | static int mips_reg_fetch (SIM_CPU *, int, unsigned char *, int); |
346 | static int mips_reg_store (SIM_CPU *, int, unsigned char *, int); | |
347 | ||
c906108c | 348 | SIM_DESC |
8ac57fbd | 349 | sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv) |
c906108c | 350 | { |
7bebb329 | 351 | int i; |
c906108c | 352 | SIM_DESC sd = sim_state_alloc (kind, cb); |
7bebb329 | 353 | sim_cpu *cpu; |
c906108c SS |
354 | |
355 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
356 | ||
7bebb329 MF |
357 | /* The cpu data is kept in a separately allocated chunk of memory. */ |
358 | if (sim_cpu_alloc_all (sd, 1, /*cgen_cpu_max_extra_bytes ()*/0) != SIM_RC_OK) | |
359 | return 0; | |
360 | ||
361 | cpu = STATE_CPU (sd, 0); /* FIXME */ | |
362 | ||
c906108c SS |
363 | /* FIXME: watchpoints code shouldn't need this */ |
364 | STATE_WATCHPOINTS (sd)->pc = &(PC); | |
365 | STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC); | |
366 | STATE_WATCHPOINTS (sd)->interrupt_handler = interrupt_event; | |
367 | ||
368 | /* Initialize the mechanism for doing insn profiling. */ | |
369 | CPU_INSN_NAME (cpu) = get_insn_name; | |
370 | CPU_MAX_INSNS (cpu) = nr_itable_entries; | |
371 | ||
372 | STATE = 0; | |
373 | ||
374 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) | |
375 | return 0; | |
376 | sim_add_option_table (sd, NULL, mips_options); | |
377 | ||
378 | ||
379 | /* getopt will print the error message so we just have to exit if this fails. | |
380 | FIXME: Hmmm... in the case of gdb we need getopt to call | |
381 | print_filtered. */ | |
382 | if (sim_parse_args (sd, argv) != SIM_RC_OK) | |
383 | { | |
384 | /* Uninstall the modules to avoid memory leaks, | |
385 | file descriptor leaks, etc. */ | |
386 | sim_module_uninstall (sd); | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* handle board-specific memory maps */ | |
391 | if (board == NULL) | |
392 | { | |
393 | /* Allocate core managed memory */ | |
14fb6c5a TS |
394 | sim_memopt *entry, *match = NULL; |
395 | address_word mem_size = 0; | |
396 | int mapped = 0; | |
adf40b2e | 397 | |
c906108c SS |
398 | /* For compatibility with the old code - under this (at level one) |
399 | are the kernel spaces K0 & K1. Both of these map to a single | |
400 | smaller sub region */ | |
401 | sim_do_command(sd," memory region 0x7fff8000,0x8000") ; /* MTZ- 32 k stack */ | |
14fb6c5a TS |
402 | |
403 | /* Look for largest memory region defined on command-line at | |
404 | phys address 0. */ | |
14fb6c5a TS |
405 | for (entry = STATE_MEMOPT (sd); entry != NULL; entry = entry->next) |
406 | { | |
407 | /* If we find an entry at address 0, then we will end up | |
408 | allocating a new buffer in the "memory alias" command | |
409 | below. The region at address 0 will be deleted. */ | |
410 | address_word size = (entry->modulo != 0 | |
411 | ? entry->modulo : entry->nr_bytes); | |
412 | if (entry->addr == 0 | |
413 | && (!match || entry->level < match->level)) | |
414 | match = entry; | |
415 | else if (entry->addr == K0BASE || entry->addr == K1BASE) | |
416 | mapped = 1; | |
417 | else | |
418 | { | |
419 | sim_memopt *alias; | |
420 | for (alias = entry->alias; alias != NULL; alias = alias->next) | |
421 | { | |
422 | if (alias->addr == 0 | |
423 | && (!match || entry->level < match->level)) | |
424 | match = entry; | |
425 | else if (alias->addr == K0BASE || alias->addr == K1BASE) | |
426 | mapped = 1; | |
427 | } | |
428 | } | |
429 | } | |
430 | ||
431 | if (!mapped) | |
432 | { | |
433 | if (match) | |
434 | { | |
435 | /* Get existing memory region size. */ | |
436 | mem_size = (match->modulo != 0 | |
437 | ? match->modulo : match->nr_bytes); | |
438 | /* Delete old region. */ | |
439 | sim_do_commandf (sd, "memory delete %d:0x%lx@%d", | |
440 | match->space, match->addr, match->level); | |
441 | } | |
442 | else if (mem_size == 0) | |
443 | mem_size = MEM_SIZE; | |
444 | /* Limit to KSEG1 size (512MB) */ | |
445 | if (mem_size > K1SIZE) | |
446 | mem_size = K1SIZE; | |
447 | /* memory alias K1BASE@1,K1SIZE%MEMSIZE,K0BASE */ | |
448 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx%%0x%lx,0x%0x", | |
449 | K1BASE, K1SIZE, (long)mem_size, K0BASE); | |
450 | } | |
451 | ||
c906108c SS |
452 | device_init(sd); |
453 | } | |
43e526b9 JM |
454 | else if (board != NULL |
455 | && (strcmp(board, BOARD_BSP) == 0)) | |
456 | { | |
457 | int i; | |
458 | ||
459 | STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT; | |
460 | ||
461 | /* ROM: 0x9FC0_0000 - 0x9FFF_FFFF and 0xBFC0_0000 - 0xBFFF_FFFF */ | |
462 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", | |
463 | 0x9FC00000, | |
464 | 4 * 1024 * 1024, /* 4 MB */ | |
465 | 0xBFC00000); | |
466 | ||
467 | /* SRAM: 0x8000_0000 - 0x803F_FFFF and 0xA000_0000 - 0xA03F_FFFF */ | |
468 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", | |
469 | 0x80000000, | |
470 | 4 * 1024 * 1024, /* 4 MB */ | |
471 | 0xA0000000); | |
472 | ||
473 | /* DRAM: 0x8800_0000 - 0x89FF_FFFF and 0xA800_0000 - 0xA9FF_FFFF */ | |
474 | for (i=0; i<8; i++) /* 32 MB total */ | |
475 | { | |
476 | unsigned size = 4 * 1024 * 1024; /* 4 MB */ | |
477 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", | |
478 | 0x88000000 + (i * size), | |
479 | size, | |
480 | 0xA8000000 + (i * size)); | |
481 | } | |
482 | } | |
c906108c | 483 | #if (WITH_HW) |
43e526b9 JM |
484 | else if (board != NULL |
485 | && (strcmp(board, BOARD_JMR3904) == 0 || | |
486 | strcmp(board, BOARD_JMR3904_PAL) == 0 || | |
487 | strcmp(board, BOARD_JMR3904_DEBUG) == 0)) | |
c906108c SS |
488 | { |
489 | /* match VIRTUAL memory layout of JMR-TX3904 board */ | |
490 | int i; | |
491 | ||
adf40b2e JM |
492 | /* --- disable monitor unless forced on by user --- */ |
493 | ||
494 | if (! firmware_option_p) | |
495 | { | |
496 | idt_monitor_base = 0; | |
497 | pmon_monitor_base = 0; | |
498 | lsipmon_monitor_base = 0; | |
499 | } | |
500 | ||
c906108c SS |
501 | /* --- environment --- */ |
502 | ||
503 | STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT; | |
504 | ||
505 | /* --- memory --- */ | |
506 | ||
507 | /* ROM: 0x9FC0_0000 - 0x9FFF_FFFF and 0xBFC0_0000 - 0xBFFF_FFFF */ | |
508 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", | |
509 | 0x9FC00000, | |
510 | 4 * 1024 * 1024, /* 4 MB */ | |
511 | 0xBFC00000); | |
512 | ||
513 | /* SRAM: 0x8000_0000 - 0x803F_FFFF and 0xA000_0000 - 0xA03F_FFFF */ | |
514 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", | |
515 | 0x80000000, | |
516 | 4 * 1024 * 1024, /* 4 MB */ | |
517 | 0xA0000000); | |
518 | ||
519 | /* DRAM: 0x8800_0000 - 0x89FF_FFFF and 0xA800_0000 - 0xA9FF_FFFF */ | |
520 | for (i=0; i<8; i++) /* 32 MB total */ | |
521 | { | |
522 | unsigned size = 4 * 1024 * 1024; /* 4 MB */ | |
523 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", | |
524 | 0x88000000 + (i * size), | |
525 | size, | |
526 | 0xA8000000 + (i * size)); | |
527 | } | |
528 | ||
cb7450ea | 529 | /* Dummy memory regions for unsimulated devices - sorted by address */ |
c906108c | 530 | |
d4f3574e | 531 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB1000000, 0x400); /* ISA I/O */ |
c2d11a7d JM |
532 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB2100000, 0x004); /* ISA ctl */ |
533 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB2500000, 0x004); /* LED/switch */ | |
d4f3574e SS |
534 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB2700000, 0x004); /* RTC */ |
535 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB3C00000, 0x004); /* RTC */ | |
cb7450ea FCE |
536 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFF8000, 0x900); /* DRAMC */ |
537 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFF9000, 0x200); /* EBIF */ | |
538 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFFE000, 0x01c); /* EBIF */ | |
539 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFFF500, 0x300); /* PIO */ | |
540 | ||
c906108c SS |
541 | |
542 | /* --- simulated devices --- */ | |
543 | sim_hw_parse (sd, "/tx3904irc@0xffffc000/reg 0xffffc000 0x20"); | |
544 | sim_hw_parse (sd, "/tx3904cpu"); | |
545 | sim_hw_parse (sd, "/tx3904tmr@0xfffff000/reg 0xfffff000 0x100"); | |
546 | sim_hw_parse (sd, "/tx3904tmr@0xfffff100/reg 0xfffff100 0x100"); | |
547 | sim_hw_parse (sd, "/tx3904tmr@0xfffff200/reg 0xfffff200 0x100"); | |
548 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/reg 0xfffff300 0x100"); | |
549 | { | |
550 | /* FIXME: poking at dv-sockser internals, use tcp backend if | |
551 | --sockser_addr option was given.*/ | |
552 | extern char* sockser_addr; | |
553 | if(sockser_addr == NULL) | |
554 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/backend stdio"); | |
555 | else | |
556 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/backend tcp"); | |
557 | } | |
558 | sim_hw_parse (sd, "/tx3904sio@0xfffff400/reg 0xfffff400 0x100"); | |
559 | sim_hw_parse (sd, "/tx3904sio@0xfffff400/backend stdio"); | |
560 | ||
561 | /* -- device connections --- */ | |
562 | sim_hw_parse (sd, "/tx3904irc > ip level /tx3904cpu"); | |
563 | sim_hw_parse (sd, "/tx3904tmr@0xfffff000 > int tmr0 /tx3904irc"); | |
564 | sim_hw_parse (sd, "/tx3904tmr@0xfffff100 > int tmr1 /tx3904irc"); | |
565 | sim_hw_parse (sd, "/tx3904tmr@0xfffff200 > int tmr2 /tx3904irc"); | |
566 | sim_hw_parse (sd, "/tx3904sio@0xfffff300 > int sio0 /tx3904irc"); | |
567 | sim_hw_parse (sd, "/tx3904sio@0xfffff400 > int sio1 /tx3904irc"); | |
568 | ||
569 | /* add PAL timer & I/O module */ | |
570 | if(! strcmp(board, BOARD_JMR3904_PAL)) | |
571 | { | |
572 | /* the device */ | |
573 | sim_hw_parse (sd, "/pal@0xffff0000"); | |
574 | sim_hw_parse (sd, "/pal@0xffff0000/reg 0xffff0000 64"); | |
575 | ||
576 | /* wire up interrupt ports to irc */ | |
577 | sim_hw_parse (sd, "/pal@0x31000000 > countdown tmr0 /tx3904irc"); | |
578 | sim_hw_parse (sd, "/pal@0x31000000 > timer tmr1 /tx3904irc"); | |
579 | sim_hw_parse (sd, "/pal@0x31000000 > int int0 /tx3904irc"); | |
580 | } | |
581 | ||
582 | if(! strcmp(board, BOARD_JMR3904_DEBUG)) | |
583 | { | |
584 | /* -- DEBUG: glue interrupt generators --- */ | |
585 | sim_hw_parse (sd, "/glue@0xffff0000/reg 0xffff0000 0x50"); | |
586 | sim_hw_parse (sd, "/glue@0xffff0000 > int0 int0 /tx3904irc"); | |
587 | sim_hw_parse (sd, "/glue@0xffff0000 > int1 int1 /tx3904irc"); | |
588 | sim_hw_parse (sd, "/glue@0xffff0000 > int2 int2 /tx3904irc"); | |
589 | sim_hw_parse (sd, "/glue@0xffff0000 > int3 int3 /tx3904irc"); | |
590 | sim_hw_parse (sd, "/glue@0xffff0000 > int4 int4 /tx3904irc"); | |
591 | sim_hw_parse (sd, "/glue@0xffff0000 > int5 int5 /tx3904irc"); | |
592 | sim_hw_parse (sd, "/glue@0xffff0000 > int6 int6 /tx3904irc"); | |
593 | sim_hw_parse (sd, "/glue@0xffff0000 > int7 int7 /tx3904irc"); | |
594 | sim_hw_parse (sd, "/glue@0xffff0000 > int8 dmac0 /tx3904irc"); | |
595 | sim_hw_parse (sd, "/glue@0xffff0000 > int9 dmac1 /tx3904irc"); | |
596 | sim_hw_parse (sd, "/glue@0xffff0000 > int10 dmac2 /tx3904irc"); | |
597 | sim_hw_parse (sd, "/glue@0xffff0000 > int11 dmac3 /tx3904irc"); | |
598 | sim_hw_parse (sd, "/glue@0xffff0000 > int12 sio0 /tx3904irc"); | |
599 | sim_hw_parse (sd, "/glue@0xffff0000 > int13 sio1 /tx3904irc"); | |
600 | sim_hw_parse (sd, "/glue@0xffff0000 > int14 tmr0 /tx3904irc"); | |
601 | sim_hw_parse (sd, "/glue@0xffff0000 > int15 tmr1 /tx3904irc"); | |
602 | sim_hw_parse (sd, "/glue@0xffff0000 > int16 tmr2 /tx3904irc"); | |
603 | sim_hw_parse (sd, "/glue@0xffff0000 > int17 nmi /tx3904cpu"); | |
604 | } | |
605 | ||
606 | device_init(sd); | |
607 | } | |
608 | #endif | |
609 | ||
2525df03 NC |
610 | if (display_mem_info) |
611 | { | |
612 | struct option_list * ol; | |
613 | struct option_list * prev; | |
614 | ||
615 | /* This is a hack. We want to execute the real --memory-info command | |
616 | line switch which is handled in common/sim-memopts.c, not the | |
617 | override we have defined in this file. So we remove the | |
618 | mips_options array from the state options list. This is safe | |
619 | because we have now processed all of the command line. */ | |
620 | for (ol = STATE_OPTIONS (sd), prev = NULL; | |
621 | ol != NULL; | |
622 | prev = ol, ol = ol->next) | |
623 | if (ol->options == mips_options) | |
624 | break; | |
625 | ||
626 | SIM_ASSERT (ol != NULL); | |
627 | ||
628 | if (prev == NULL) | |
629 | STATE_OPTIONS (sd) = ol->next; | |
630 | else | |
631 | prev->next = ol->next; | |
632 | ||
633 | sim_do_commandf (sd, "memory-info"); | |
634 | } | |
c906108c SS |
635 | |
636 | /* check for/establish the a reference program image */ | |
637 | if (sim_analyze_program (sd, | |
638 | (STATE_PROG_ARGV (sd) != NULL | |
639 | ? *STATE_PROG_ARGV (sd) | |
640 | : NULL), | |
641 | abfd) != SIM_RC_OK) | |
642 | { | |
643 | sim_module_uninstall (sd); | |
644 | return 0; | |
645 | } | |
646 | ||
647 | /* Configure/verify the target byte order and other runtime | |
648 | configuration options */ | |
649 | if (sim_config (sd) != SIM_RC_OK) | |
650 | { | |
651 | sim_module_uninstall (sd); | |
652 | return 0; | |
653 | } | |
654 | ||
655 | if (sim_post_argv_init (sd) != SIM_RC_OK) | |
656 | { | |
657 | /* Uninstall the modules to avoid memory leaks, | |
658 | file descriptor leaks, etc. */ | |
659 | sim_module_uninstall (sd); | |
660 | return 0; | |
661 | } | |
662 | ||
663 | /* verify assumptions the simulator made about the host type system. | |
664 | This macro does not return if there is a problem */ | |
665 | SIM_ASSERT (sizeof(int) == (4 * sizeof(char))); | |
666 | SIM_ASSERT (sizeof(word64) == (8 * sizeof(char))); | |
667 | ||
668 | /* This is NASTY, in that we are assuming the size of specific | |
669 | registers: */ | |
670 | { | |
671 | int rn; | |
672 | for (rn = 0; (rn < (LAST_EMBED_REGNUM + 1)); rn++) | |
673 | { | |
674 | if (rn < 32) | |
675 | cpu->register_widths[rn] = WITH_TARGET_WORD_BITSIZE; | |
ee7254b0 | 676 | else if ((rn >= FGR_BASE) && (rn < (FGR_BASE + NR_FGR))) |
c906108c SS |
677 | cpu->register_widths[rn] = WITH_TARGET_FLOATING_POINT_BITSIZE; |
678 | else if ((rn >= 33) && (rn <= 37)) | |
679 | cpu->register_widths[rn] = WITH_TARGET_WORD_BITSIZE; | |
680 | else if ((rn == SRIDX) | |
681 | || (rn == FCR0IDX) | |
682 | || (rn == FCR31IDX) | |
683 | || ((rn >= 72) && (rn <= 89))) | |
684 | cpu->register_widths[rn] = 32; | |
685 | else | |
686 | cpu->register_widths[rn] = 0; | |
687 | } | |
688 | ||
689 | ||
690 | } | |
691 | ||
c906108c SS |
692 | if (STATE & simTRACE) |
693 | open_trace(sd); | |
c906108c | 694 | |
adf40b2e JM |
695 | /* |
696 | sim_io_eprintf (sd, "idt@%x pmon@%x lsipmon@%x\n", | |
697 | idt_monitor_base, | |
698 | pmon_monitor_base, | |
699 | lsipmon_monitor_base); | |
700 | */ | |
c906108c SS |
701 | |
702 | /* Write the monitor trap address handlers into the monitor (eeprom) | |
703 | address space. This can only be done once the target endianness | |
704 | has been determined. */ | |
adf40b2e JM |
705 | if (idt_monitor_base != 0) |
706 | { | |
707 | unsigned loop; | |
708 | unsigned idt_monitor_size = 1 << 11; | |
709 | ||
710 | /* the default monitor region */ | |
711 | sim_do_commandf (sd, "memory region 0x%x,0x%x", | |
712 | idt_monitor_base, idt_monitor_size); | |
713 | ||
714 | /* Entry into the IDT monitor is via fixed address vectors, and | |
715 | not using machine instructions. To avoid clashing with use of | |
716 | the MIPS TRAP system, we place our own (simulator specific) | |
717 | "undefined" instructions into the relevant vector slots. */ | |
718 | for (loop = 0; (loop < idt_monitor_size); loop += 4) | |
719 | { | |
720 | address_word vaddr = (idt_monitor_base + loop); | |
721 | unsigned32 insn = (RSVD_INSTRUCTION | | |
722 | (((loop >> 2) & RSVD_INSTRUCTION_ARG_MASK) | |
723 | << RSVD_INSTRUCTION_ARG_SHIFT)); | |
724 | H2T (insn); | |
8ac57fbd | 725 | sim_write (sd, vaddr, (unsigned char *)&insn, sizeof (insn)); |
adf40b2e JM |
726 | } |
727 | } | |
728 | ||
729 | if ((pmon_monitor_base != 0) || (lsipmon_monitor_base != 0)) | |
730 | { | |
c906108c SS |
731 | /* The PMON monitor uses the same address space, but rather than |
732 | branching into it the address of a routine is loaded. We can | |
733 | cheat for the moment, and direct the PMON routine to IDT style | |
734 | instructions within the monitor space. This relies on the IDT | |
735 | monitor not using the locations from 0xBFC00500 onwards as its | |
736 | entry points.*/ | |
adf40b2e JM |
737 | unsigned loop; |
738 | for (loop = 0; (loop < 24); loop++) | |
739 | { | |
740 | unsigned32 value = ((0x500 - 8) / 8); /* default UNDEFINED reason code */ | |
741 | switch (loop) | |
742 | { | |
c906108c SS |
743 | case 0: /* read */ |
744 | value = 7; | |
745 | break; | |
746 | case 1: /* write */ | |
747 | value = 8; | |
748 | break; | |
749 | case 2: /* open */ | |
750 | value = 6; | |
751 | break; | |
752 | case 3: /* close */ | |
753 | value = 10; | |
754 | break; | |
755 | case 5: /* printf */ | |
756 | value = ((0x500 - 16) / 8); /* not an IDT reason code */ | |
757 | break; | |
758 | case 8: /* cliexit */ | |
759 | value = 17; | |
760 | break; | |
761 | case 11: /* flush_cache */ | |
762 | value = 28; | |
763 | break; | |
764 | } | |
adf40b2e JM |
765 | |
766 | SIM_ASSERT (idt_monitor_base != 0); | |
767 | value = ((unsigned int) idt_monitor_base + (value * 8)); | |
c906108c | 768 | H2T (value); |
c906108c | 769 | |
adf40b2e JM |
770 | if (pmon_monitor_base != 0) |
771 | { | |
772 | address_word vaddr = (pmon_monitor_base + (loop * 4)); | |
8ac57fbd | 773 | sim_write (sd, vaddr, (unsigned char *)&value, sizeof (value)); |
adf40b2e JM |
774 | } |
775 | ||
776 | if (lsipmon_monitor_base != 0) | |
777 | { | |
778 | address_word vaddr = (lsipmon_monitor_base + (loop * 4)); | |
8ac57fbd | 779 | sim_write (sd, vaddr, (unsigned char *)&value, sizeof (value)); |
adf40b2e | 780 | } |
c906108c | 781 | } |
adf40b2e JM |
782 | |
783 | /* Write an abort sequence into the TRAP (common) exception vector | |
784 | addresses. This is to catch code executing a TRAP (et.al.) | |
785 | instruction without installing a trap handler. */ | |
786 | if ((idt_monitor_base != 0) || | |
787 | (pmon_monitor_base != 0) || | |
788 | (lsipmon_monitor_base != 0)) | |
789 | { | |
790 | unsigned32 halt[2] = { 0x2404002f /* addiu r4, r0, 47 */, | |
791 | HALT_INSTRUCTION /* BREAK */ }; | |
792 | H2T (halt[0]); | |
793 | H2T (halt[1]); | |
8ac57fbd MF |
794 | sim_write (sd, 0x80000000, (unsigned char *) halt, sizeof (halt)); |
795 | sim_write (sd, 0x80000180, (unsigned char *) halt, sizeof (halt)); | |
796 | sim_write (sd, 0x80000200, (unsigned char *) halt, sizeof (halt)); | |
adf40b2e | 797 | /* XXX: Write here unconditionally? */ |
8ac57fbd MF |
798 | sim_write (sd, 0xBFC00200, (unsigned char *) halt, sizeof (halt)); |
799 | sim_write (sd, 0xBFC00380, (unsigned char *) halt, sizeof (halt)); | |
800 | sim_write (sd, 0xBFC00400, (unsigned char *) halt, sizeof (halt)); | |
adf40b2e | 801 | } |
c906108c SS |
802 | } |
803 | ||
7bebb329 MF |
804 | /* CPU specific initialization. */ |
805 | for (i = 0; i < MAX_NR_PROCESSORS; ++i) | |
806 | { | |
807 | SIM_CPU *cpu = STATE_CPU (sd, i); | |
c906108c | 808 | |
e1211e55 MF |
809 | CPU_REG_FETCH (cpu) = mips_reg_fetch; |
810 | CPU_REG_STORE (cpu) = mips_reg_store; | |
7bebb329 MF |
811 | CPU_PC_FETCH (cpu) = mips_pc_get; |
812 | CPU_PC_STORE (cpu) = mips_pc_set; | |
813 | } | |
c906108c SS |
814 | |
815 | return sd; | |
816 | } | |
817 | ||
29bc024d | 818 | #if WITH_TRACE_ANY_P |
c906108c | 819 | static void |
8ac57fbd | 820 | open_trace (SIM_DESC sd) |
c906108c SS |
821 | { |
822 | tracefh = fopen(tracefile,"wb+"); | |
823 | if (tracefh == NULL) | |
824 | { | |
825 | sim_io_eprintf(sd,"Failed to create file \"%s\", writing trace information to stderr.\n",tracefile); | |
826 | tracefh = stderr; | |
827 | } | |
828 | } | |
29bc024d | 829 | #endif |
c906108c SS |
830 | |
831 | /* Return name of an insn, used by insn profiling. */ | |
832 | static const char * | |
833 | get_insn_name (sim_cpu *cpu, int i) | |
834 | { | |
835 | return itable[i].name; | |
836 | } | |
837 | ||
838 | void | |
6e4f085c | 839 | mips_sim_close (SIM_DESC sd, int quitting) |
c906108c | 840 | { |
29bc024d | 841 | #if WITH_TRACE_ANY_P |
c906108c SS |
842 | if (tracefh != NULL && tracefh != stderr) |
843 | fclose(tracefh); | |
844 | tracefh = NULL; | |
29bc024d | 845 | #endif |
c906108c SS |
846 | } |
847 | ||
e1211e55 MF |
848 | static int |
849 | mips_reg_store (SIM_CPU *cpu, int rn, unsigned char *memory, int length) | |
c906108c | 850 | { |
c906108c SS |
851 | /* NOTE: gdb (the client) stores registers in target byte order |
852 | while the simulator uses host byte order */ | |
c906108c SS |
853 | |
854 | /* Unfortunately this suffers from the same problem as the register | |
855 | numbering one. We need to know what the width of each logical | |
856 | register number is for the architecture being simulated. */ | |
857 | ||
858 | if (cpu->register_widths[rn] == 0) | |
859 | { | |
e1211e55 | 860 | sim_io_eprintf (CPU_STATE (cpu), "Invalid register width for %d (register store ignored)\n", rn); |
c906108c SS |
861 | return 0; |
862 | } | |
863 | ||
ee7254b0 | 864 | if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR) |
c906108c | 865 | { |
ee7254b0 | 866 | cpu->fpr_state[rn - FGR_BASE] = fmt_uninterpreted; |
c906108c SS |
867 | if (cpu->register_widths[rn] == 32) |
868 | { | |
a0b3c4fd JM |
869 | if (length == 8) |
870 | { | |
ee7254b0 | 871 | cpu->fgr[rn - FGR_BASE] = |
a0b3c4fd JM |
872 | (unsigned32) T2H_8 (*(unsigned64*)memory); |
873 | return 8; | |
874 | } | |
875 | else | |
876 | { | |
ee7254b0 | 877 | cpu->fgr[rn - FGR_BASE] = T2H_4 (*(unsigned32*)memory); |
a0b3c4fd JM |
878 | return 4; |
879 | } | |
c906108c SS |
880 | } |
881 | else | |
882 | { | |
14fb6c5a TS |
883 | if (length == 8) |
884 | { | |
885 | cpu->fgr[rn - FGR_BASE] = T2H_8 (*(unsigned64*)memory); | |
886 | return 8; | |
887 | } | |
888 | else | |
889 | { | |
890 | cpu->fgr[rn - FGR_BASE] = T2H_4 (*(unsigned32*)memory); | |
891 | return 4; | |
892 | } | |
c906108c SS |
893 | } |
894 | } | |
895 | ||
896 | if (cpu->register_widths[rn] == 32) | |
897 | { | |
a0b3c4fd JM |
898 | if (length == 8) |
899 | { | |
900 | cpu->registers[rn] = | |
901 | (unsigned32) T2H_8 (*(unsigned64*)memory); | |
902 | return 8; | |
903 | } | |
904 | else | |
905 | { | |
906 | cpu->registers[rn] = T2H_4 (*(unsigned32*)memory); | |
907 | return 4; | |
908 | } | |
c906108c SS |
909 | } |
910 | else | |
911 | { | |
14fb6c5a TS |
912 | if (length == 8) |
913 | { | |
914 | cpu->registers[rn] = T2H_8 (*(unsigned64*)memory); | |
915 | return 8; | |
916 | } | |
917 | else | |
918 | { | |
919 | cpu->registers[rn] = (signed32) T2H_4(*(unsigned32*)memory); | |
920 | return 4; | |
921 | } | |
c906108c SS |
922 | } |
923 | ||
924 | return 0; | |
925 | } | |
926 | ||
e1211e55 MF |
927 | static int |
928 | mips_reg_fetch (SIM_CPU *cpu, int rn, unsigned char *memory, int length) | |
c906108c | 929 | { |
c906108c SS |
930 | /* NOTE: gdb (the client) stores registers in target byte order |
931 | while the simulator uses host byte order */ | |
c906108c SS |
932 | |
933 | if (cpu->register_widths[rn] == 0) | |
934 | { | |
e1211e55 | 935 | sim_io_eprintf (CPU_STATE (cpu), "Invalid register width for %d (register fetch ignored)\n", rn); |
c906108c SS |
936 | return 0; |
937 | } | |
938 | ||
c906108c | 939 | /* Any floating point register */ |
ee7254b0 | 940 | if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR) |
c906108c SS |
941 | { |
942 | if (cpu->register_widths[rn] == 32) | |
943 | { | |
a0b3c4fd JM |
944 | if (length == 8) |
945 | { | |
946 | *(unsigned64*)memory = | |
ee7254b0 | 947 | H2T_8 ((unsigned32) (cpu->fgr[rn - FGR_BASE])); |
a0b3c4fd JM |
948 | return 8; |
949 | } | |
950 | else | |
951 | { | |
ee7254b0 | 952 | *(unsigned32*)memory = H2T_4 (cpu->fgr[rn - FGR_BASE]); |
a0b3c4fd JM |
953 | return 4; |
954 | } | |
c906108c SS |
955 | } |
956 | else | |
957 | { | |
14fb6c5a TS |
958 | if (length == 8) |
959 | { | |
960 | *(unsigned64*)memory = H2T_8 (cpu->fgr[rn - FGR_BASE]); | |
961 | return 8; | |
962 | } | |
963 | else | |
964 | { | |
965 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->fgr[rn - FGR_BASE])); | |
966 | return 4; | |
967 | } | |
c906108c SS |
968 | } |
969 | } | |
970 | ||
971 | if (cpu->register_widths[rn] == 32) | |
972 | { | |
a0b3c4fd JM |
973 | if (length == 8) |
974 | { | |
975 | *(unsigned64*)memory = | |
976 | H2T_8 ((unsigned32) (cpu->registers[rn])); | |
977 | return 8; | |
978 | } | |
979 | else | |
980 | { | |
981 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->registers[rn])); | |
982 | return 4; | |
983 | } | |
c906108c SS |
984 | } |
985 | else | |
986 | { | |
14fb6c5a TS |
987 | if (length == 8) |
988 | { | |
989 | *(unsigned64*)memory = | |
990 | H2T_8 ((unsigned64) (cpu->registers[rn])); | |
991 | return 8; | |
992 | } | |
993 | else | |
994 | { | |
995 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->registers[rn])); | |
996 | return 4; | |
997 | } | |
c906108c SS |
998 | } |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
c906108c | 1003 | SIM_RC |
8ac57fbd | 1004 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env) |
c906108c SS |
1005 | { |
1006 | ||
1007 | #ifdef DEBUG | |
1008 | #if 0 /* FIXME: doesn't compile */ | |
1009 | printf("DBG: sim_create_inferior entered: start_address = 0x%s\n", | |
1010 | pr_addr(PC)); | |
1011 | #endif | |
1012 | #endif /* DEBUG */ | |
1013 | ||
1014 | ColdReset(sd); | |
1015 | ||
1016 | if (abfd != NULL) | |
1017 | { | |
1018 | /* override PC value set by ColdReset () */ | |
1019 | int cpu_nr; | |
1020 | for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++) | |
1021 | { | |
1022 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); | |
034685f9 | 1023 | CPU_PC_SET (cpu, (unsigned64) bfd_get_start_address (abfd)); |
c906108c SS |
1024 | } |
1025 | } | |
1026 | ||
1027 | #if 0 /* def DEBUG */ | |
1028 | if (argv || env) | |
1029 | { | |
1030 | /* We should really place the argv slot values into the argument | |
1031 | registers, and onto the stack as required. However, this | |
1032 | assumes that we have a stack defined, which is not | |
1033 | necessarily true at the moment. */ | |
1034 | char **cptr; | |
1035 | sim_io_printf(sd,"sim_create_inferior() : passed arguments ignored\n"); | |
1036 | for (cptr = argv; (cptr && *cptr); cptr++) | |
1037 | printf("DBG: arg \"%s\"\n",*cptr); | |
1038 | } | |
1039 | #endif /* DEBUG */ | |
1040 | ||
1041 | return SIM_RC_OK; | |
1042 | } | |
1043 | ||
c906108c SS |
1044 | /*---------------------------------------------------------------------------*/ |
1045 | /*-- Private simulator support interface ------------------------------------*/ | |
1046 | /*---------------------------------------------------------------------------*/ | |
1047 | ||
1048 | /* Read a null terminated string from memory, return in a buffer */ | |
1049 | static char * | |
1050 | fetch_str (SIM_DESC sd, | |
1051 | address_word addr) | |
1052 | { | |
1053 | char *buf; | |
1054 | int nr = 0; | |
8ac57fbd | 1055 | unsigned char null; |
c906108c SS |
1056 | while (sim_read (sd, addr + nr, &null, 1) == 1 && null != 0) |
1057 | nr++; | |
1058 | buf = NZALLOC (char, nr + 1); | |
8ac57fbd | 1059 | sim_read (sd, addr, (unsigned char *)buf, nr); |
c906108c SS |
1060 | return buf; |
1061 | } | |
1062 | ||
adf40b2e JM |
1063 | |
1064 | /* Implements the "sim firmware" command: | |
1065 | sim firmware NAME[@ADDRESS] --- emulate ROM monitor named NAME. | |
1066 | NAME can be idt, pmon, or lsipmon. If omitted, ADDRESS | |
1067 | defaults to the normal address for that monitor. | |
1068 | sim firmware none --- don't emulate any ROM monitor. Useful | |
1069 | if you need a clean address space. */ | |
1070 | static SIM_RC | |
1071 | sim_firmware_command (SIM_DESC sd, char *arg) | |
1072 | { | |
1073 | int address_present = 0; | |
1074 | SIM_ADDR address; | |
1075 | ||
1076 | /* Signal occurrence of this option. */ | |
1077 | firmware_option_p = 1; | |
1078 | ||
1079 | /* Parse out the address, if present. */ | |
1080 | { | |
1081 | char *p = strchr (arg, '@'); | |
1082 | if (p) | |
1083 | { | |
1084 | char *q; | |
1085 | address_present = 1; | |
1086 | p ++; /* skip over @ */ | |
1087 | ||
1088 | address = strtoul (p, &q, 0); | |
1089 | if (*q != '\0') | |
1090 | { | |
1091 | sim_io_printf (sd, "Invalid address given to the" | |
1092 | "`sim firmware NAME@ADDRESS' command: %s\n", | |
1093 | p); | |
1094 | return SIM_RC_FAIL; | |
1095 | } | |
1096 | } | |
1097 | else | |
b4b6c939 AC |
1098 | { |
1099 | address_present = 0; | |
1100 | address = -1; /* Dummy value. */ | |
1101 | } | |
adf40b2e JM |
1102 | } |
1103 | ||
1104 | if (! strncmp (arg, "idt", 3)) | |
1105 | { | |
1106 | idt_monitor_base = address_present ? address : 0xBFC00000; | |
1107 | pmon_monitor_base = 0; | |
1108 | lsipmon_monitor_base = 0; | |
1109 | } | |
1110 | else if (! strncmp (arg, "pmon", 4)) | |
1111 | { | |
1112 | /* pmon uses indirect calls. Hook into implied idt. */ | |
1113 | pmon_monitor_base = address_present ? address : 0xBFC00500; | |
1114 | idt_monitor_base = pmon_monitor_base - 0x500; | |
1115 | lsipmon_monitor_base = 0; | |
1116 | } | |
1117 | else if (! strncmp (arg, "lsipmon", 7)) | |
1118 | { | |
1119 | /* lsipmon uses indirect calls. Hook into implied idt. */ | |
1120 | pmon_monitor_base = 0; | |
1121 | lsipmon_monitor_base = address_present ? address : 0xBFC00200; | |
1122 | idt_monitor_base = lsipmon_monitor_base - 0x200; | |
1123 | } | |
1124 | else if (! strncmp (arg, "none", 4)) | |
1125 | { | |
1126 | if (address_present) | |
1127 | { | |
1128 | sim_io_printf (sd, | |
1129 | "The `sim firmware none' command does " | |
1130 | "not take an `ADDRESS' argument.\n"); | |
1131 | return SIM_RC_FAIL; | |
1132 | } | |
1133 | idt_monitor_base = 0; | |
1134 | pmon_monitor_base = 0; | |
1135 | lsipmon_monitor_base = 0; | |
1136 | } | |
1137 | else | |
1138 | { | |
1139 | sim_io_printf (sd, "\ | |
1140 | Unrecognized name given to the `sim firmware NAME' command: %s\n\ | |
1141 | Recognized firmware names are: `idt', `pmon', `lsipmon', and `none'.\n", | |
1142 | arg); | |
1143 | return SIM_RC_FAIL; | |
1144 | } | |
1145 | ||
1146 | return SIM_RC_OK; | |
1147 | } | |
1148 | ||
1149 | ||
1150 | ||
c906108c | 1151 | /* Simple monitor interface (currently setup for the IDT and PMON monitors) */ |
8030f857 | 1152 | int |
c906108c SS |
1153 | sim_monitor (SIM_DESC sd, |
1154 | sim_cpu *cpu, | |
1155 | address_word cia, | |
1156 | unsigned int reason) | |
1157 | { | |
1158 | #ifdef DEBUG | |
1159 | printf("DBG: sim_monitor: entered (reason = %d)\n",reason); | |
1160 | #endif /* DEBUG */ | |
1161 | ||
1162 | /* The IDT monitor actually allows two instructions per vector | |
1163 | slot. However, the simulator currently causes a trap on each | |
1164 | individual instruction. We cheat, and lose the bottom bit. */ | |
1165 | reason >>= 1; | |
1166 | ||
1167 | /* The following callback functions are available, however the | |
1168 | monitor we are simulating does not make use of them: get_errno, | |
1169 | isatty, lseek, rename, system, time and unlink */ | |
1170 | switch (reason) | |
1171 | { | |
1172 | ||
1173 | case 6: /* int open(char *path,int flags) */ | |
1174 | { | |
1175 | char *path = fetch_str (sd, A0); | |
1176 | V0 = sim_io_open (sd, path, (int)A1); | |
d79fe0d6 | 1177 | free (path); |
c906108c SS |
1178 | break; |
1179 | } | |
1180 | ||
1181 | case 7: /* int read(int file,char *ptr,int len) */ | |
1182 | { | |
1183 | int fd = A0; | |
1184 | int nr = A2; | |
1185 | char *buf = zalloc (nr); | |
1186 | V0 = sim_io_read (sd, fd, buf, nr); | |
8ac57fbd | 1187 | sim_write (sd, A1, (unsigned char *)buf, nr); |
d79fe0d6 | 1188 | free (buf); |
c906108c SS |
1189 | } |
1190 | break; | |
1191 | ||
1192 | case 8: /* int write(int file,char *ptr,int len) */ | |
1193 | { | |
1194 | int fd = A0; | |
1195 | int nr = A2; | |
1196 | char *buf = zalloc (nr); | |
8ac57fbd | 1197 | sim_read (sd, A1, (unsigned char *)buf, nr); |
c906108c | 1198 | V0 = sim_io_write (sd, fd, buf, nr); |
f8df4c77 TS |
1199 | if (fd == 1) |
1200 | sim_io_flush_stdout (sd); | |
1201 | else if (fd == 2) | |
1202 | sim_io_flush_stderr (sd); | |
d79fe0d6 | 1203 | free (buf); |
c906108c SS |
1204 | break; |
1205 | } | |
1206 | ||
1207 | case 10: /* int close(int file) */ | |
1208 | { | |
1209 | V0 = sim_io_close (sd, (int)A0); | |
1210 | break; | |
1211 | } | |
1212 | ||
1213 | case 2: /* Densan monitor: char inbyte(int waitflag) */ | |
1214 | { | |
1215 | if (A0 == 0) /* waitflag == NOWAIT */ | |
1216 | V0 = (unsigned_word)-1; | |
1217 | } | |
1218 | /* Drop through to case 11 */ | |
1219 | ||
1220 | case 11: /* char inbyte(void) */ | |
1221 | { | |
1222 | char tmp; | |
43e526b9 JM |
1223 | /* ensure that all output has gone... */ |
1224 | sim_io_flush_stdout (sd); | |
c906108c SS |
1225 | if (sim_io_read_stdin (sd, &tmp, sizeof(char)) != sizeof(char)) |
1226 | { | |
1227 | sim_io_error(sd,"Invalid return from character read"); | |
1228 | V0 = (unsigned_word)-1; | |
1229 | } | |
1230 | else | |
1231 | V0 = (unsigned_word)tmp; | |
1232 | break; | |
1233 | } | |
1234 | ||
1235 | case 3: /* Densan monitor: void co(char chr) */ | |
1236 | case 12: /* void outbyte(char chr) : write a byte to "stdout" */ | |
1237 | { | |
1238 | char tmp = (char)(A0 & 0xFF); | |
1239 | sim_io_write_stdout (sd, &tmp, sizeof(char)); | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | case 17: /* void _exit() */ | |
1244 | { | |
1245 | sim_io_eprintf (sd, "sim_monitor(17): _exit(int reason) to be coded\n"); | |
1246 | sim_engine_halt (SD, CPU, NULL, NULL_CIA, sim_exited, | |
1247 | (unsigned int)(A0 & 0xFFFFFFFF)); | |
1248 | break; | |
1249 | } | |
1250 | ||
e80fc152 | 1251 | case 28: /* PMON flush_cache */ |
c906108c SS |
1252 | break; |
1253 | ||
1254 | case 55: /* void get_mem_info(unsigned int *ptr) */ | |
1255 | /* in: A0 = pointer to three word memory location */ | |
1256 | /* out: [A0 + 0] = size */ | |
1257 | /* [A0 + 4] = instruction cache size */ | |
1258 | /* [A0 + 8] = data cache size */ | |
1259 | { | |
14fb6c5a | 1260 | unsigned_4 value; |
c906108c | 1261 | unsigned_4 zero = 0; |
14fb6c5a TS |
1262 | address_word mem_size; |
1263 | sim_memopt *entry, *match = NULL; | |
1264 | ||
1265 | /* Search for memory region mapped to KSEG0 or KSEG1. */ | |
1266 | for (entry = STATE_MEMOPT (sd); | |
1267 | entry != NULL; | |
1268 | entry = entry->next) | |
1269 | { | |
1270 | if ((entry->addr == K0BASE || entry->addr == K1BASE) | |
1271 | && (!match || entry->level < match->level)) | |
1272 | match = entry; | |
1273 | else | |
1274 | { | |
1275 | sim_memopt *alias; | |
1276 | for (alias = entry->alias; | |
1277 | alias != NULL; | |
1278 | alias = alias->next) | |
1279 | if ((alias->addr == K0BASE || alias->addr == K1BASE) | |
1280 | && (!match || entry->level < match->level)) | |
1281 | match = entry; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | /* Get region size, limit to KSEG1 size (512MB). */ | |
1286 | SIM_ASSERT (match != NULL); | |
1287 | mem_size = (match->modulo != 0 | |
1288 | ? match->modulo : match->nr_bytes); | |
1289 | if (mem_size > K1SIZE) | |
1290 | mem_size = K1SIZE; | |
1291 | ||
1292 | value = mem_size; | |
c906108c | 1293 | H2T (value); |
8ac57fbd MF |
1294 | sim_write (sd, A0 + 0, (unsigned char *)&value, 4); |
1295 | sim_write (sd, A0 + 4, (unsigned char *)&zero, 4); | |
1296 | sim_write (sd, A0 + 8, (unsigned char *)&zero, 4); | |
5accf1ff | 1297 | /* sim_io_eprintf (sd, "sim: get_mem_info() deprecated\n"); */ |
c906108c SS |
1298 | break; |
1299 | } | |
1300 | ||
e80fc152 | 1301 | case 158: /* PMON printf */ |
c906108c SS |
1302 | /* in: A0 = pointer to format string */ |
1303 | /* A1 = optional argument 1 */ | |
1304 | /* A2 = optional argument 2 */ | |
1305 | /* A3 = optional argument 3 */ | |
1306 | /* out: void */ | |
1307 | /* The following is based on the PMON printf source */ | |
1308 | { | |
1309 | address_word s = A0; | |
8ac57fbd | 1310 | unsigned char c; |
c906108c SS |
1311 | signed_word *ap = &A1; /* 1st argument */ |
1312 | /* This isn't the quickest way, since we call the host print | |
1313 | routine for every character almost. But it does avoid | |
1314 | having to allocate and manage a temporary string buffer. */ | |
1315 | /* TODO: Include check that we only use three arguments (A1, | |
1316 | A2 and A3) */ | |
1317 | while (sim_read (sd, s++, &c, 1) && c != '\0') | |
1318 | { | |
1319 | if (c == '%') | |
1320 | { | |
1321 | char tmp[40]; | |
1322 | enum {FMT_RJUST, FMT_LJUST, FMT_RJUST0, FMT_CENTER} fmt = FMT_RJUST; | |
1323 | int width = 0, trunc = 0, haddot = 0, longlong = 0; | |
1324 | while (sim_read (sd, s++, &c, 1) && c != '\0') | |
1325 | { | |
1326 | if (strchr ("dobxXulscefg%", c)) | |
1327 | break; | |
1328 | else if (c == '-') | |
1329 | fmt = FMT_LJUST; | |
1330 | else if (c == '0') | |
1331 | fmt = FMT_RJUST0; | |
1332 | else if (c == '~') | |
1333 | fmt = FMT_CENTER; | |
1334 | else if (c == '*') | |
1335 | { | |
1336 | if (haddot) | |
1337 | trunc = (int)*ap++; | |
1338 | else | |
1339 | width = (int)*ap++; | |
1340 | } | |
1341 | else if (c >= '1' && c <= '9') | |
1342 | { | |
1343 | address_word t = s; | |
1344 | unsigned int n; | |
1345 | while (sim_read (sd, s++, &c, 1) == 1 && isdigit (c)) | |
1346 | tmp[s - t] = c; | |
1347 | tmp[s - t] = '\0'; | |
1348 | n = (unsigned int)strtol(tmp,NULL,10); | |
1349 | if (haddot) | |
1350 | trunc = n; | |
1351 | else | |
1352 | width = n; | |
1353 | s--; | |
1354 | } | |
1355 | else if (c == '.') | |
1356 | haddot = 1; | |
1357 | } | |
1358 | switch (c) | |
1359 | { | |
1360 | case '%': | |
1361 | sim_io_printf (sd, "%%"); | |
1362 | break; | |
1363 | case 's': | |
1364 | if ((int)*ap != 0) | |
1365 | { | |
1366 | address_word p = *ap++; | |
8ac57fbd | 1367 | unsigned char ch; |
c906108c SS |
1368 | while (sim_read (sd, p++, &ch, 1) == 1 && ch != '\0') |
1369 | sim_io_printf(sd, "%c", ch); | |
1370 | } | |
1371 | else | |
1372 | sim_io_printf(sd,"(null)"); | |
1373 | break; | |
1374 | case 'c': | |
1375 | sim_io_printf (sd, "%c", (int)*ap++); | |
1376 | break; | |
1377 | default: | |
1378 | if (c == 'l') | |
1379 | { | |
1380 | sim_read (sd, s++, &c, 1); | |
1381 | if (c == 'l') | |
1382 | { | |
1383 | longlong = 1; | |
1384 | sim_read (sd, s++, &c, 1); | |
1385 | } | |
1386 | } | |
1387 | if (strchr ("dobxXu", c)) | |
1388 | { | |
1389 | word64 lv = (word64) *ap++; | |
1390 | if (c == 'b') | |
1391 | sim_io_printf(sd,"<binary not supported>"); | |
1392 | else | |
1393 | { | |
1394 | sprintf (tmp, "%%%s%c", longlong ? "ll" : "", c); | |
1395 | if (longlong) | |
1396 | sim_io_printf(sd, tmp, lv); | |
1397 | else | |
1398 | sim_io_printf(sd, tmp, (int)lv); | |
1399 | } | |
1400 | } | |
1401 | else if (strchr ("eEfgG", c)) | |
1402 | { | |
1403 | double dbl = *(double*)(ap++); | |
1404 | sprintf (tmp, "%%%d.%d%c", width, trunc, c); | |
1405 | sim_io_printf (sd, tmp, dbl); | |
1406 | trunc = 0; | |
1407 | } | |
1408 | } | |
1409 | } | |
1410 | else | |
1411 | sim_io_printf(sd, "%c", c); | |
1412 | } | |
1413 | break; | |
1414 | } | |
1415 | ||
1416 | default: | |
8030f857 BE |
1417 | /* Unknown reason. */ |
1418 | return 0; | |
c906108c | 1419 | } |
8030f857 | 1420 | return 1; |
c906108c SS |
1421 | } |
1422 | ||
1423 | /* Store a word into memory. */ | |
1424 | ||
1425 | static void | |
1426 | store_word (SIM_DESC sd, | |
1427 | sim_cpu *cpu, | |
1428 | address_word cia, | |
1429 | uword64 vaddr, | |
1430 | signed_word val) | |
1431 | { | |
26f8bf63 | 1432 | address_word paddr = vaddr; |
c906108c SS |
1433 | |
1434 | if ((vaddr & 3) != 0) | |
1435 | SignalExceptionAddressStore (); | |
1436 | else | |
1437 | { | |
26f8bf63 MF |
1438 | const uword64 mask = 7; |
1439 | uword64 memval; | |
1440 | unsigned int byte; | |
1441 | ||
1442 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)); | |
1443 | byte = (vaddr & mask) ^ (BigEndianCPU << 2); | |
1444 | memval = ((uword64) val) << (8 * byte); | |
1445 | StoreMemory (AccessLength_WORD, memval, 0, paddr, vaddr, | |
1446 | isREAL); | |
c906108c SS |
1447 | } |
1448 | } | |
1449 | ||
1450 | /* Load a word from memory. */ | |
1451 | ||
1452 | static signed_word | |
1453 | load_word (SIM_DESC sd, | |
1454 | sim_cpu *cpu, | |
1455 | address_word cia, | |
1456 | uword64 vaddr) | |
1457 | { | |
1458 | if ((vaddr & 3) != 0) | |
1459 | { | |
1460 | SIM_CORE_SIGNAL (SD, cpu, cia, read_map, AccessLength_WORD+1, vaddr, read_transfer, sim_core_unaligned_signal); | |
1461 | } | |
1462 | else | |
1463 | { | |
26f8bf63 MF |
1464 | address_word paddr = vaddr; |
1465 | const uword64 mask = 0x7; | |
1466 | const unsigned int reverse = ReverseEndian ? 1 : 0; | |
1467 | const unsigned int bigend = BigEndianCPU ? 1 : 0; | |
1468 | uword64 memval; | |
1469 | unsigned int byte; | |
1470 | ||
1471 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (reverse << 2)); | |
1472 | LoadMemory (&memval, NULL, AccessLength_WORD, paddr, vaddr, isDATA, | |
1473 | isREAL); | |
1474 | byte = (vaddr & mask) ^ (bigend << 2); | |
1475 | return EXTEND32 (memval >> (8 * byte)); | |
c906108c SS |
1476 | } |
1477 | ||
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | /* Simulate the mips16 entry and exit pseudo-instructions. These | |
1482 | would normally be handled by the reserved instruction exception | |
1483 | code, but for ease of simulation we just handle them directly. */ | |
1484 | ||
1485 | static void | |
1486 | mips16_entry (SIM_DESC sd, | |
1487 | sim_cpu *cpu, | |
1488 | address_word cia, | |
1489 | unsigned int insn) | |
1490 | { | |
1491 | int aregs, sregs, rreg; | |
1492 | ||
1493 | #ifdef DEBUG | |
1494 | printf("DBG: mips16_entry: entered (insn = 0x%08X)\n",insn); | |
1495 | #endif /* DEBUG */ | |
1496 | ||
1497 | aregs = (insn & 0x700) >> 8; | |
1498 | sregs = (insn & 0x0c0) >> 6; | |
1499 | rreg = (insn & 0x020) >> 5; | |
1500 | ||
1501 | /* This should be checked by the caller. */ | |
1502 | if (sregs == 3) | |
1503 | abort (); | |
1504 | ||
1505 | if (aregs < 5) | |
1506 | { | |
1507 | int i; | |
1508 | signed_word tsp; | |
1509 | ||
1510 | /* This is the entry pseudo-instruction. */ | |
1511 | ||
1512 | for (i = 0; i < aregs; i++) | |
1513 | store_word (SD, CPU, cia, (uword64) (SP + 4 * i), GPR[i + 4]); | |
1514 | ||
1515 | tsp = SP; | |
1516 | SP -= 32; | |
1517 | ||
1518 | if (rreg) | |
1519 | { | |
1520 | tsp -= 4; | |
1521 | store_word (SD, CPU, cia, (uword64) tsp, RA); | |
1522 | } | |
1523 | ||
1524 | for (i = 0; i < sregs; i++) | |
1525 | { | |
1526 | tsp -= 4; | |
1527 | store_word (SD, CPU, cia, (uword64) tsp, GPR[16 + i]); | |
1528 | } | |
1529 | } | |
1530 | else | |
1531 | { | |
1532 | int i; | |
1533 | signed_word tsp; | |
1534 | ||
1535 | /* This is the exit pseudo-instruction. */ | |
1536 | ||
1537 | tsp = SP + 32; | |
1538 | ||
1539 | if (rreg) | |
1540 | { | |
1541 | tsp -= 4; | |
1542 | RA = load_word (SD, CPU, cia, (uword64) tsp); | |
1543 | } | |
1544 | ||
1545 | for (i = 0; i < sregs; i++) | |
1546 | { | |
1547 | tsp -= 4; | |
1548 | GPR[i + 16] = load_word (SD, CPU, cia, (uword64) tsp); | |
1549 | } | |
1550 | ||
1551 | SP += 32; | |
1552 | ||
1553 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
1554 | { | |
1555 | if (aregs == 5) | |
1556 | { | |
1557 | FGR[0] = WORD64LO (GPR[4]); | |
1558 | FPR_STATE[0] = fmt_uninterpreted; | |
1559 | } | |
1560 | else if (aregs == 6) | |
1561 | { | |
1562 | FGR[0] = WORD64LO (GPR[5]); | |
1563 | FGR[1] = WORD64LO (GPR[4]); | |
1564 | FPR_STATE[0] = fmt_uninterpreted; | |
1565 | FPR_STATE[1] = fmt_uninterpreted; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | PC = RA; | |
1570 | } | |
1571 | ||
1572 | } | |
1573 | ||
1574 | /*-- trace support ----------------------------------------------------------*/ | |
1575 | ||
29bc024d | 1576 | /* The trace support is provided (if required) in the memory accessing |
c906108c SS |
1577 | routines. Since we are also providing the architecture specific |
1578 | features, the architecture simulation code can also deal with | |
29bc024d | 1579 | notifying the trace world of cache flushes, etc. Similarly we do |
c906108c SS |
1580 | not need to provide profiling support in the simulator engine, |
1581 | since we can sample in the instruction fetch control loop. By | |
29bc024d | 1582 | defining the trace manifest, we add tracing as a run-time |
c906108c SS |
1583 | option. */ |
1584 | ||
29bc024d | 1585 | #if WITH_TRACE_ANY_P |
c906108c SS |
1586 | /* Tracing by default produces "din" format (as required by |
1587 | dineroIII). Each line of such a trace file *MUST* have a din label | |
1588 | and address field. The rest of the line is ignored, so comments can | |
1589 | be included if desired. The first field is the label which must be | |
1590 | one of the following values: | |
1591 | ||
1592 | 0 read data | |
1593 | 1 write data | |
1594 | 2 instruction fetch | |
1595 | 3 escape record (treated as unknown access type) | |
1596 | 4 escape record (causes cache flush) | |
1597 | ||
1598 | The address field is a 32bit (lower-case) hexadecimal address | |
1599 | value. The address should *NOT* be preceded by "0x". | |
1600 | ||
1601 | The size of the memory transfer is not important when dealing with | |
1602 | cache lines (as long as no more than a cache line can be | |
1603 | transferred in a single operation :-), however more information | |
1604 | could be given following the dineroIII requirement to allow more | |
1605 | complete memory and cache simulators to provide better | |
1606 | results. i.e. the University of Pisa has a cache simulator that can | |
1607 | also take bus size and speed as (variable) inputs to calculate | |
1608 | complete system performance (a much more useful ability when trying | |
1609 | to construct an end product, rather than a processor). They | |
1610 | currently have an ARM version of their tool called ChARM. */ | |
1611 | ||
1612 | ||
1613 | void | |
1614 | dotrace (SIM_DESC sd, | |
1615 | sim_cpu *cpu, | |
1616 | FILE *tracefh, | |
1617 | int type, | |
1618 | SIM_ADDR address, | |
1619 | int width, | |
1620 | char *comment,...) | |
1621 | { | |
1622 | if (STATE & simTRACE) { | |
1623 | va_list ap; | |
1624 | fprintf(tracefh,"%d %s ; width %d ; ", | |
1625 | type, | |
1626 | pr_addr(address), | |
1627 | width); | |
1628 | va_start(ap,comment); | |
1629 | vfprintf(tracefh,comment,ap); | |
1630 | va_end(ap); | |
1631 | fprintf(tracefh,"\n"); | |
1632 | } | |
1633 | /* NOTE: Since the "din" format will only accept 32bit addresses, and | |
1634 | we may be generating 64bit ones, we should put the hi-32bits of the | |
1635 | address into the comment field. */ | |
1636 | ||
1637 | /* TODO: Provide a buffer for the trace lines. We can then avoid | |
1638 | performing writes until the buffer is filled, or the file is | |
1639 | being closed. */ | |
1640 | ||
1641 | /* NOTE: We could consider adding a comment field to the "din" file | |
1642 | produced using type 3 markers (unknown access). This would then | |
1643 | allow information about the program that the "din" is for, and | |
1644 | the MIPs world that was being simulated, to be placed into the | |
1645 | trace file. */ | |
1646 | ||
1647 | return; | |
1648 | } | |
29bc024d | 1649 | #endif /* WITH_TRACE_ANY_P */ |
c906108c SS |
1650 | |
1651 | /*---------------------------------------------------------------------------*/ | |
1652 | /*-- simulator engine -------------------------------------------------------*/ | |
1653 | /*---------------------------------------------------------------------------*/ | |
1654 | ||
1655 | static void | |
1656 | ColdReset (SIM_DESC sd) | |
1657 | { | |
1658 | int cpu_nr; | |
1659 | for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++) | |
1660 | { | |
1661 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); | |
1662 | /* RESET: Fixed PC address: */ | |
1663 | PC = (unsigned_word) UNSIGNED64 (0xFFFFFFFFBFC00000); | |
1664 | /* The reset vector address is in the unmapped, uncached memory space. */ | |
1665 | ||
1666 | SR &= ~(status_SR | status_TS | status_RP); | |
1667 | SR |= (status_ERL | status_BEV); | |
1668 | ||
1669 | /* Cheat and allow access to the complete register set immediately */ | |
1670 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT | |
1671 | && WITH_TARGET_WORD_BITSIZE == 64) | |
1672 | SR |= status_FR; /* 64bit registers */ | |
1673 | ||
1674 | /* Ensure that any instructions with pending register updates are | |
1675 | cleared: */ | |
1676 | PENDING_INVALIDATE(); | |
1677 | ||
1678 | /* Initialise the FPU registers to the unknown state */ | |
1679 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
1680 | { | |
1681 | int rn; | |
1682 | for (rn = 0; (rn < 32); rn++) | |
1683 | FPR_STATE[rn] = fmt_uninterpreted; | |
1684 | } | |
1685 | ||
07802d98 TS |
1686 | /* Initialise the Config0 register. */ |
1687 | C0_CONFIG = 0x80000000 /* Config1 present */ | |
1688 | | 2; /* KSEG0 uncached */ | |
1689 | if (WITH_TARGET_WORD_BITSIZE == 64) | |
1690 | { | |
1691 | /* FIXME Currently mips/sim-main.c:address_translation() | |
1692 | truncates all addresses to 32-bits. */ | |
1693 | if (0 && WITH_TARGET_ADDRESS_BITSIZE == 64) | |
1694 | C0_CONFIG |= (2 << 13); /* MIPS64, 64-bit addresses */ | |
1695 | else | |
1696 | C0_CONFIG |= (1 << 13); /* MIPS64, 32-bit addresses */ | |
1697 | } | |
1698 | if (BigEndianMem) | |
1699 | C0_CONFIG |= 0x00008000; /* Big Endian */ | |
c906108c SS |
1700 | } |
1701 | } | |
1702 | ||
1703 | ||
1704 | ||
1705 | ||
1706 | /* Description from page A-26 of the "MIPS IV Instruction Set" manual (revision 3.1) */ | |
1707 | /* Signal an exception condition. This will result in an exception | |
1708 | that aborts the instruction. The instruction operation pseudocode | |
1709 | will never see a return from this function call. */ | |
1710 | ||
1711 | void | |
1712 | signal_exception (SIM_DESC sd, | |
1713 | sim_cpu *cpu, | |
1714 | address_word cia, | |
1715 | int exception,...) | |
1716 | { | |
1717 | /* int vector; */ | |
1718 | ||
1719 | #ifdef DEBUG | |
1720 | sim_io_printf(sd,"DBG: SignalException(%d) PC = 0x%s\n",exception,pr_addr(cia)); | |
1721 | #endif /* DEBUG */ | |
1722 | ||
1723 | /* Ensure that any active atomic read/modify/write operation will fail: */ | |
1724 | LLBIT = 0; | |
1725 | ||
1726 | /* Save registers before interrupt dispatching */ | |
1727 | #ifdef SIM_CPU_EXCEPTION_TRIGGER | |
1728 | SIM_CPU_EXCEPTION_TRIGGER(sd, cpu, cia); | |
1729 | #endif | |
1730 | ||
1731 | switch (exception) { | |
1732 | ||
e80fc152 | 1733 | case DebugBreakPoint: |
c906108c SS |
1734 | if (! (Debug & Debug_DM)) |
1735 | { | |
1736 | if (INDELAYSLOT()) | |
1737 | { | |
1738 | CANCELDELAYSLOT(); | |
1739 | ||
1740 | Debug |= Debug_DBD; /* signaled from within in delay slot */ | |
1741 | DEPC = cia - 4; /* reference the branch instruction */ | |
1742 | } | |
1743 | else | |
1744 | { | |
1745 | Debug &= ~Debug_DBD; /* not signaled from within a delay slot */ | |
1746 | DEPC = cia; | |
1747 | } | |
1748 | ||
1749 | Debug |= Debug_DM; /* in debugging mode */ | |
1750 | Debug |= Debug_DBp; /* raising a DBp exception */ | |
1751 | PC = 0xBFC00200; | |
1752 | sim_engine_restart (SD, CPU, NULL, NULL_CIA); | |
1753 | } | |
1754 | break; | |
1755 | ||
e80fc152 | 1756 | case ReservedInstruction: |
c906108c SS |
1757 | { |
1758 | va_list ap; | |
1759 | unsigned int instruction; | |
1760 | va_start(ap,exception); | |
1761 | instruction = va_arg(ap,unsigned int); | |
1762 | va_end(ap); | |
1763 | /* Provide simple monitor support using ReservedInstruction | |
1764 | exceptions. The following code simulates the fixed vector | |
1765 | entry points into the IDT monitor by causing a simulator | |
1766 | trap, performing the monitor operation, and returning to | |
1767 | the address held in the $ra register (standard PCS return | |
1768 | address). This means we only need to pre-load the vector | |
1769 | space with suitable instruction values. For systems were | |
1770 | actual trap instructions are used, we would not need to | |
1771 | perform this magic. */ | |
1772 | if ((instruction & RSVD_INSTRUCTION_MASK) == RSVD_INSTRUCTION) | |
1773 | { | |
8030f857 BE |
1774 | int reason = (instruction >> RSVD_INSTRUCTION_ARG_SHIFT) & RSVD_INSTRUCTION_ARG_MASK; |
1775 | if (!sim_monitor (SD, CPU, cia, reason)) | |
1776 | sim_io_error (sd, "sim_monitor: unhandled reason = %d, pc = 0x%s\n", reason, pr_addr (cia)); | |
1777 | ||
c906108c SS |
1778 | /* NOTE: This assumes that a branch-and-link style |
1779 | instruction was used to enter the vector (which is the | |
1780 | case with the current IDT monitor). */ | |
1781 | sim_engine_restart (SD, CPU, NULL, RA); | |
1782 | } | |
1783 | /* Look for the mips16 entry and exit instructions, and | |
1784 | simulate a handler for them. */ | |
1785 | else if ((cia & 1) != 0 | |
1786 | && (instruction & 0xf81f) == 0xe809 | |
1787 | && (instruction & 0x0c0) != 0x0c0) | |
1788 | { | |
1789 | mips16_entry (SD, CPU, cia, instruction); | |
1790 | sim_engine_restart (sd, NULL, NULL, NULL_CIA); | |
1791 | } | |
1792 | /* else fall through to normal exception processing */ | |
1793 | sim_io_eprintf(sd,"ReservedInstruction at PC = 0x%s\n", pr_addr (cia)); | |
1794 | } | |
1795 | ||
1796 | default: | |
1797 | /* Store exception code into current exception id variable (used | |
1798 | by exit code): */ | |
1799 | ||
1800 | /* TODO: If not simulating exceptions then stop the simulator | |
1801 | execution. At the moment we always stop the simulation. */ | |
1802 | ||
1803 | #ifdef SUBTARGET_R3900 | |
1804 | /* update interrupt-related registers */ | |
1805 | ||
1806 | /* insert exception code in bits 6:2 */ | |
1807 | CAUSE = LSMASKED32(CAUSE, 31, 7) | LSINSERTED32(exception, 6, 2); | |
1808 | /* shift IE/KU history bits left */ | |
1809 | SR = LSMASKED32(SR, 31, 4) | LSINSERTED32(LSEXTRACTED32(SR, 3, 0), 5, 2); | |
1810 | ||
1811 | if (STATE & simDELAYSLOT) | |
1812 | { | |
1813 | STATE &= ~simDELAYSLOT; | |
1814 | CAUSE |= cause_BD; | |
1815 | EPC = (cia - 4); /* reference the branch instruction */ | |
1816 | } | |
1817 | else | |
1818 | EPC = cia; | |
1819 | ||
1820 | if (SR & status_BEV) | |
1821 | PC = (signed)0xBFC00000 + 0x180; | |
1822 | else | |
1823 | PC = (signed)0x80000000 + 0x080; | |
1824 | #else | |
1825 | /* See figure 5-17 for an outline of the code below */ | |
1826 | if (! (SR & status_EXL)) | |
1827 | { | |
1828 | CAUSE = (exception << 2); | |
1829 | if (STATE & simDELAYSLOT) | |
1830 | { | |
1831 | STATE &= ~simDELAYSLOT; | |
1832 | CAUSE |= cause_BD; | |
1833 | EPC = (cia - 4); /* reference the branch instruction */ | |
1834 | } | |
1835 | else | |
1836 | EPC = cia; | |
1837 | /* FIXME: TLB et.al. */ | |
1838 | /* vector = 0x180; */ | |
1839 | } | |
1840 | else | |
1841 | { | |
1842 | CAUSE = (exception << 2); | |
1843 | /* vector = 0x180; */ | |
1844 | } | |
1845 | SR |= status_EXL; | |
1846 | /* Store exception code into current exception id variable (used | |
1847 | by exit code): */ | |
1848 | ||
1849 | if (SR & status_BEV) | |
1850 | PC = (signed)0xBFC00200 + 0x180; | |
1851 | else | |
1852 | PC = (signed)0x80000000 + 0x180; | |
1853 | #endif | |
1854 | ||
1855 | switch ((CAUSE >> 2) & 0x1F) | |
1856 | { | |
1857 | case Interrupt: | |
1858 | /* Interrupts arrive during event processing, no need to | |
1859 | restart */ | |
1860 | return; | |
1861 | ||
1862 | case NMIReset: | |
1863 | /* Ditto */ | |
1864 | #ifdef SUBTARGET_3900 | |
1865 | /* Exception vector: BEV=0 BFC00000 / BEF=1 BFC00000 */ | |
1866 | PC = (signed)0xBFC00000; | |
0d3e762b | 1867 | #endif /* SUBTARGET_3900 */ |
c906108c SS |
1868 | return; |
1869 | ||
1870 | case TLBModification: | |
1871 | case TLBLoad: | |
1872 | case TLBStore: | |
1873 | case AddressLoad: | |
1874 | case AddressStore: | |
1875 | case InstructionFetch: | |
1876 | case DataReference: | |
1877 | /* The following is so that the simulator will continue from the | |
1878 | exception handler address. */ | |
1879 | sim_engine_halt (SD, CPU, NULL, PC, | |
1880 | sim_stopped, SIM_SIGBUS); | |
1881 | ||
1882 | case ReservedInstruction: | |
1883 | case CoProcessorUnusable: | |
1884 | PC = EPC; | |
1885 | sim_engine_halt (SD, CPU, NULL, PC, | |
1886 | sim_stopped, SIM_SIGILL); | |
1887 | ||
1888 | case IntegerOverflow: | |
1889 | case FPE: | |
1890 | sim_engine_halt (SD, CPU, NULL, PC, | |
1891 | sim_stopped, SIM_SIGFPE); | |
1892 | ||
1893 | case BreakPoint: | |
1894 | sim_engine_halt (SD, CPU, NULL, PC, sim_stopped, SIM_SIGTRAP); | |
1895 | break; | |
1896 | ||
1897 | case SystemCall: | |
1898 | case Trap: | |
1899 | sim_engine_restart (SD, CPU, NULL, PC); | |
1900 | break; | |
1901 | ||
1902 | case Watch: | |
1903 | PC = EPC; | |
1904 | sim_engine_halt (SD, CPU, NULL, PC, | |
1905 | sim_stopped, SIM_SIGTRAP); | |
1906 | ||
e80fc152 | 1907 | default: /* Unknown internal exception */ |
c906108c SS |
1908 | PC = EPC; |
1909 | sim_engine_halt (SD, CPU, NULL, PC, | |
1910 | sim_stopped, SIM_SIGABRT); | |
1911 | ||
1912 | } | |
1913 | ||
1914 | case SimulatorFault: | |
1915 | { | |
1916 | va_list ap; | |
1917 | char *msg; | |
1918 | va_start(ap,exception); | |
1919 | msg = va_arg(ap,char *); | |
1920 | va_end(ap); | |
1921 | sim_engine_abort (SD, CPU, NULL_CIA, | |
1922 | "FATAL: Simulator error \"%s\"\n",msg); | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | return; | |
1927 | } | |
1928 | ||
1929 | ||
1930 | ||
402586aa CD |
1931 | /* This function implements what the MIPS32 and MIPS64 ISAs define as |
1932 | "UNPREDICTABLE" behaviour. | |
1933 | ||
1934 | About UNPREDICTABLE behaviour they say: "UNPREDICTABLE results | |
1935 | may vary from processor implementation to processor implementation, | |
1936 | instruction to instruction, or as a function of time on the same | |
1937 | implementation or instruction. Software can never depend on results | |
1938 | that are UNPREDICTABLE. ..." (MIPS64 Architecture for Programmers | |
1939 | Volume II, The MIPS64 Instruction Set. MIPS Document MD00087 revision | |
1940 | 0.95, page 2.) | |
1941 | ||
1942 | For UNPREDICTABLE behaviour, we print a message, if possible print | |
1943 | the offending instructions mips.igen instruction name (provided by | |
1944 | the caller), and stop the simulator. | |
1945 | ||
1946 | XXX FIXME: eventually, stopping the simulator should be made conditional | |
1947 | on a command-line option. */ | |
1948 | void | |
1949 | unpredictable_action(sim_cpu *cpu, address_word cia) | |
c906108c | 1950 | { |
402586aa CD |
1951 | SIM_DESC sd = CPU_STATE(cpu); |
1952 | ||
1953 | sim_io_eprintf(sd, "UNPREDICTABLE: PC = 0x%s\n", pr_addr (cia)); | |
1954 | sim_engine_halt (SD, CPU, NULL, cia, sim_stopped, SIM_SIGABRT); | |
c906108c | 1955 | } |
c906108c | 1956 | |
c906108c SS |
1957 | |
1958 | /*-- co-processor support routines ------------------------------------------*/ | |
1959 | ||
1960 | static int UNUSED | |
1961 | CoProcPresent(unsigned int coproc_number) | |
1962 | { | |
1963 | /* Return TRUE if simulator provides a model for the given co-processor number */ | |
1964 | return(0); | |
1965 | } | |
1966 | ||
1967 | void | |
1968 | cop_lw (SIM_DESC sd, | |
1969 | sim_cpu *cpu, | |
1970 | address_word cia, | |
1971 | int coproc_num, | |
1972 | int coproc_reg, | |
1973 | unsigned int memword) | |
1974 | { | |
1975 | switch (coproc_num) | |
1976 | { | |
1977 | case 1: | |
1978 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
1979 | { | |
1980 | #ifdef DEBUG | |
1981 | printf("DBG: COP_LW: memword = 0x%08X (uword64)memword = 0x%s\n",memword,pr_addr(memword)); | |
1982 | #endif | |
14fb6c5a | 1983 | StoreFPR(coproc_reg,fmt_uninterpreted_32,(uword64)memword); |
c906108c SS |
1984 | break; |
1985 | } | |
1986 | ||
1987 | default: | |
1988 | #if 0 /* this should be controlled by a configuration option */ | |
1989 | 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)); | |
1990 | #endif | |
1991 | break; | |
1992 | } | |
1993 | ||
1994 | return; | |
1995 | } | |
1996 | ||
1997 | void | |
1998 | cop_ld (SIM_DESC sd, | |
1999 | sim_cpu *cpu, | |
2000 | address_word cia, | |
2001 | int coproc_num, | |
2002 | int coproc_reg, | |
2003 | uword64 memword) | |
2004 | { | |
2005 | ||
2006 | #ifdef DEBUG | |
2007 | 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) ); | |
2008 | #endif | |
2009 | ||
2010 | switch (coproc_num) { | |
2011 | case 1: | |
2012 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2013 | { | |
14fb6c5a | 2014 | StoreFPR(coproc_reg,fmt_uninterpreted_64,memword); |
c906108c SS |
2015 | break; |
2016 | } | |
2017 | ||
2018 | default: | |
2019 | #if 0 /* this message should be controlled by a configuration option */ | |
2020 | 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)); | |
2021 | #endif | |
2022 | break; | |
2023 | } | |
2024 | ||
2025 | return; | |
2026 | } | |
2027 | ||
2028 | ||
2029 | ||
2030 | ||
2031 | unsigned int | |
2032 | cop_sw (SIM_DESC sd, | |
2033 | sim_cpu *cpu, | |
2034 | address_word cia, | |
2035 | int coproc_num, | |
2036 | int coproc_reg) | |
2037 | { | |
2038 | unsigned int value = 0; | |
2039 | ||
2040 | switch (coproc_num) | |
2041 | { | |
2042 | case 1: | |
2043 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2044 | { | |
14fb6c5a | 2045 | value = (unsigned int)ValueFPR(coproc_reg,fmt_uninterpreted_32); |
c906108c SS |
2046 | break; |
2047 | } | |
2048 | ||
2049 | default: | |
2050 | #if 0 /* should be controlled by configuration option */ | |
2051 | sim_io_printf(sd,"COP_SW(%d,%d) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(cia)); | |
2052 | #endif | |
2053 | break; | |
2054 | } | |
2055 | ||
2056 | return(value); | |
2057 | } | |
2058 | ||
2059 | uword64 | |
2060 | cop_sd (SIM_DESC sd, | |
2061 | sim_cpu *cpu, | |
2062 | address_word cia, | |
2063 | int coproc_num, | |
2064 | int coproc_reg) | |
2065 | { | |
2066 | uword64 value = 0; | |
2067 | switch (coproc_num) | |
2068 | { | |
2069 | case 1: | |
2070 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2071 | { | |
14fb6c5a | 2072 | value = ValueFPR(coproc_reg,fmt_uninterpreted_64); |
c906108c SS |
2073 | break; |
2074 | } | |
2075 | ||
2076 | default: | |
2077 | #if 0 /* should be controlled by configuration option */ | |
2078 | sim_io_printf(sd,"COP_SD(%d,%d) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(cia)); | |
2079 | #endif | |
2080 | break; | |
2081 | } | |
2082 | ||
2083 | return(value); | |
2084 | } | |
2085 | ||
2086 | ||
2087 | ||
2088 | ||
2089 | void | |
2090 | decode_coproc (SIM_DESC sd, | |
2091 | sim_cpu *cpu, | |
2092 | address_word cia, | |
8e394ffc AB |
2093 | unsigned int instruction, |
2094 | int coprocnum, | |
2095 | CP0_operation op, | |
2096 | int rt, | |
2097 | int rd, | |
2098 | int sel) | |
c906108c | 2099 | { |
c906108c SS |
2100 | switch (coprocnum) |
2101 | { | |
2102 | case 0: /* standard CPU control and cache registers */ | |
2103 | { | |
c906108c SS |
2104 | /* R4000 Users Manual (second edition) lists the following CP0 |
2105 | instructions: | |
2106 | CODE><-RT><RD-><--TAIL---> | |
2107 | DMFC0 Doubleword Move From CP0 (VR4100 = 01000000001tttttddddd00000000000) | |
2108 | DMTC0 Doubleword Move To CP0 (VR4100 = 01000000101tttttddddd00000000000) | |
2109 | MFC0 word Move From CP0 (VR4100 = 01000000000tttttddddd00000000000) | |
2110 | MTC0 word Move To CP0 (VR4100 = 01000000100tttttddddd00000000000) | |
2111 | TLBR Read Indexed TLB Entry (VR4100 = 01000010000000000000000000000001) | |
2112 | TLBWI Write Indexed TLB Entry (VR4100 = 01000010000000000000000000000010) | |
2113 | TLBWR Write Random TLB Entry (VR4100 = 01000010000000000000000000000110) | |
2114 | TLBP Probe TLB for Matching Entry (VR4100 = 01000010000000000000000000001000) | |
2115 | CACHE Cache operation (VR4100 = 101111bbbbbpppppiiiiiiiiiiiiiiii) | |
2116 | ERET Exception return (VR4100 = 01000010000000000000000000011000) | |
2117 | */ | |
8e394ffc AB |
2118 | if (((op == cp0_mfc0) || (op == cp0_mtc0) /* MFC0 / MTC0 */ |
2119 | || (op == cp0_dmfc0) || (op == cp0_dmtc0)) /* DMFC0 / DMTC0 */ | |
2120 | && sel == 0) | |
c906108c | 2121 | { |
c906108c SS |
2122 | switch (rd) /* NOTEs: Standard CP0 registers */ |
2123 | { | |
2124 | /* 0 = Index R4000 VR4100 VR4300 */ | |
2125 | /* 1 = Random R4000 VR4100 VR4300 */ | |
2126 | /* 2 = EntryLo0 R4000 VR4100 VR4300 */ | |
2127 | /* 3 = EntryLo1 R4000 VR4100 VR4300 */ | |
2128 | /* 4 = Context R4000 VR4100 VR4300 */ | |
2129 | /* 5 = PageMask R4000 VR4100 VR4300 */ | |
2130 | /* 6 = Wired R4000 VR4100 VR4300 */ | |
2131 | /* 8 = BadVAddr R4000 VR4100 VR4300 */ | |
2132 | /* 9 = Count R4000 VR4100 VR4300 */ | |
2133 | /* 10 = EntryHi R4000 VR4100 VR4300 */ | |
2134 | /* 11 = Compare R4000 VR4100 VR4300 */ | |
2135 | /* 12 = SR R4000 VR4100 VR4300 */ | |
2136 | #ifdef SUBTARGET_R3900 | |
2137 | case 3: | |
2138 | /* 3 = Config R3900 */ | |
2139 | case 7: | |
2140 | /* 7 = Cache R3900 */ | |
2141 | case 15: | |
2142 | /* 15 = PRID R3900 */ | |
2143 | ||
2144 | /* ignore */ | |
2145 | break; | |
2146 | ||
2147 | case 8: | |
2148 | /* 8 = BadVAddr R4000 VR4100 VR4300 */ | |
8e394ffc | 2149 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
1a27f959 | 2150 | GPR[rt] = (signed_word) (signed_address) COP0_BADVADDR; |
c906108c SS |
2151 | else |
2152 | COP0_BADVADDR = GPR[rt]; | |
2153 | break; | |
2154 | ||
2155 | #endif /* SUBTARGET_R3900 */ | |
2156 | case 12: | |
8e394ffc | 2157 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2158 | GPR[rt] = SR; |
2159 | else | |
2160 | SR = GPR[rt]; | |
2161 | break; | |
2162 | /* 13 = Cause R4000 VR4100 VR4300 */ | |
2163 | case 13: | |
8e394ffc | 2164 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2165 | GPR[rt] = CAUSE; |
2166 | else | |
2167 | CAUSE = GPR[rt]; | |
2168 | break; | |
2169 | /* 14 = EPC R4000 VR4100 VR4300 */ | |
2170 | case 14: | |
8e394ffc | 2171 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2172 | GPR[rt] = (signed_word) (signed_address) EPC; |
2173 | else | |
2174 | EPC = GPR[rt]; | |
2175 | break; | |
2176 | /* 15 = PRId R4000 VR4100 VR4300 */ | |
2177 | #ifdef SUBTARGET_R3900 | |
2178 | /* 16 = Debug */ | |
2179 | case 16: | |
8e394ffc | 2180 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2181 | GPR[rt] = Debug; |
2182 | else | |
2183 | Debug = GPR[rt]; | |
2184 | break; | |
2185 | #else | |
2186 | /* 16 = Config R4000 VR4100 VR4300 */ | |
2187 | case 16: | |
8e394ffc | 2188 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
07802d98 TS |
2189 | GPR[rt] = C0_CONFIG; |
2190 | else | |
2191 | /* only bottom three bits are writable */ | |
2192 | C0_CONFIG = (C0_CONFIG & ~0x7) | (GPR[rt] & 0x7); | |
c906108c SS |
2193 | break; |
2194 | #endif | |
2195 | #ifdef SUBTARGET_R3900 | |
2196 | /* 17 = Debug */ | |
2197 | case 17: | |
8e394ffc | 2198 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2199 | GPR[rt] = DEPC; |
2200 | else | |
2201 | DEPC = GPR[rt]; | |
2202 | break; | |
2203 | #else | |
2204 | /* 17 = LLAddr R4000 VR4100 VR4300 */ | |
2205 | #endif | |
2206 | /* 18 = WatchLo R4000 VR4100 VR4300 */ | |
2207 | /* 19 = WatchHi R4000 VR4100 VR4300 */ | |
2208 | /* 20 = XContext R4000 VR4100 VR4300 */ | |
2209 | /* 26 = PErr or ECC R4000 VR4100 VR4300 */ | |
2210 | /* 27 = CacheErr R4000 VR4100 */ | |
2211 | /* 28 = TagLo R4000 VR4100 VR4300 */ | |
2212 | /* 29 = TagHi R4000 VR4100 VR4300 */ | |
2213 | /* 30 = ErrorEPC R4000 VR4100 VR4300 */ | |
a3027dd7 FCE |
2214 | if (STATE_VERBOSE_P(SD)) |
2215 | sim_io_eprintf (SD, | |
e30db738 AC |
2216 | "Warning: PC 0x%lx:interp.c decode_coproc DEADC0DE\n", |
2217 | (unsigned long)cia); | |
c906108c SS |
2218 | GPR[rt] = 0xDEADC0DE; /* CPR[0,rd] */ |
2219 | /* CPR[0,rd] = GPR[rt]; */ | |
2220 | default: | |
8e394ffc | 2221 | if (op == cp0_mfc0 || op == cp0_dmfc0) |
c906108c SS |
2222 | GPR[rt] = (signed_word) (signed32) COP0_GPR[rd]; |
2223 | else | |
2224 | COP0_GPR[rd] = GPR[rt]; | |
2225 | #if 0 | |
2226 | if (code == 0x00) | |
2227 | sim_io_printf(sd,"Warning: MFC0 %d,%d ignored, PC=%08x (architecture specific)\n",rt,rd, (unsigned)cia); | |
2228 | else | |
2229 | sim_io_printf(sd,"Warning: MTC0 %d,%d ignored, PC=%08x (architecture specific)\n",rt,rd, (unsigned)cia); | |
2230 | #endif | |
2231 | } | |
2232 | } | |
8e394ffc | 2233 | else if ((op == cp0_mfc0 || op == cp0_dmfc0) |
07802d98 TS |
2234 | && rd == 16) |
2235 | { | |
2236 | /* [D]MFC0 RT,C0_CONFIG,SEL */ | |
2237 | signed32 cfg = 0; | |
8e394ffc | 2238 | switch (sel) |
07802d98 TS |
2239 | { |
2240 | case 0: | |
2241 | cfg = C0_CONFIG; | |
2242 | break; | |
2243 | case 1: | |
2244 | /* MIPS32 r/o Config1: | |
2245 | Config2 present */ | |
2246 | cfg = 0x80000000; | |
2247 | /* MIPS16 implemented. | |
2248 | XXX How to check configuration? */ | |
2249 | cfg |= 0x0000004; | |
2250 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) | |
2251 | /* MDMX & FPU implemented */ | |
2252 | cfg |= 0x00000021; | |
2253 | break; | |
2254 | case 2: | |
2255 | /* MIPS32 r/o Config2: | |
2256 | Config3 present. */ | |
2257 | cfg = 0x80000000; | |
2258 | break; | |
2259 | case 3: | |
2260 | /* MIPS32 r/o Config3: | |
2261 | SmartMIPS implemented. */ | |
2262 | cfg = 0x00000002; | |
2263 | break; | |
2264 | } | |
2265 | GPR[rt] = cfg; | |
2266 | } | |
8e394ffc | 2267 | else if (op == cp0_eret && sel == 0x18) |
c906108c SS |
2268 | { |
2269 | /* ERET */ | |
2270 | if (SR & status_ERL) | |
2271 | { | |
2272 | /* Oops, not yet available */ | |
2273 | sim_io_printf(sd,"Warning: ERET when SR[ERL] set not handled yet"); | |
2274 | PC = EPC; | |
2275 | SR &= ~status_ERL; | |
2276 | } | |
2277 | else | |
2278 | { | |
2279 | PC = EPC; | |
2280 | SR &= ~status_EXL; | |
2281 | } | |
2282 | } | |
8e394ffc | 2283 | else if (op == cp0_rfe && sel == 0x10) |
c906108c SS |
2284 | { |
2285 | /* RFE */ | |
2286 | #ifdef SUBTARGET_R3900 | |
2287 | /* TX39: Copy IEp/KUp -> IEc/KUc, and IEo/KUo -> IEp/KUp */ | |
2288 | ||
2289 | /* shift IE/KU history bits right */ | |
2290 | SR = LSMASKED32(SR, 31, 4) | LSINSERTED32(LSEXTRACTED32(SR, 5, 2), 3, 0); | |
2291 | ||
2292 | /* TODO: CACHE register */ | |
2293 | #endif /* SUBTARGET_R3900 */ | |
2294 | } | |
8e394ffc | 2295 | else if (op == cp0_deret && sel == 0x1F) |
c906108c SS |
2296 | { |
2297 | /* DERET */ | |
2298 | Debug &= ~Debug_DM; | |
2299 | DELAYSLOT(); | |
2300 | DSPC = DEPC; | |
2301 | } | |
2302 | else | |
2303 | sim_io_eprintf(sd,"Unrecognised COP0 instruction 0x%08X at PC = 0x%s : No handler present\n",instruction,pr_addr(cia)); | |
2304 | /* TODO: When executing an ERET or RFE instruction we should | |
2305 | clear LLBIT, to ensure that any out-standing atomic | |
2306 | read/modify/write sequence fails. */ | |
2307 | } | |
2308 | break; | |
2309 | ||
2310 | case 2: /* co-processor 2 */ | |
2311 | { | |
2312 | int handle = 0; | |
2313 | ||
2314 | ||
2315 | if(! handle) | |
2316 | { | |
2317 | sim_io_eprintf(sd, "COP2 instruction 0x%08X at PC = 0x%s : No handler present\n", | |
2318 | instruction,pr_addr(cia)); | |
2319 | } | |
2320 | } | |
2321 | break; | |
2322 | ||
2323 | case 1: /* should not occur (FPU co-processor) */ | |
2324 | case 3: /* should not occur (FPU co-processor) */ | |
2325 | SignalException(ReservedInstruction,instruction); | |
2326 | break; | |
2327 | } | |
2328 | ||
2329 | return; | |
2330 | } | |
2331 | ||
2332 | ||
2333 | /* This code copied from gdb's utils.c. Would like to share this code, | |
2334 | but don't know of a common place where both could get to it. */ | |
2335 | ||
2336 | /* Temporary storage using circular buffer */ | |
2337 | #define NUMCELLS 16 | |
2338 | #define CELLSIZE 32 | |
2339 | static char* | |
2340 | get_cell (void) | |
2341 | { | |
2342 | static char buf[NUMCELLS][CELLSIZE]; | |
2343 | static int cell=0; | |
2344 | if (++cell>=NUMCELLS) cell=0; | |
2345 | return buf[cell]; | |
2346 | } | |
2347 | ||
2348 | /* Print routines to handle variable size regs, etc */ | |
2349 | ||
2350 | /* Eliminate warning from compiler on 32-bit systems */ | |
2351 | static int thirty_two = 32; | |
2352 | ||
2353 | char* | |
8ac57fbd | 2354 | pr_addr (SIM_ADDR addr) |
c906108c SS |
2355 | { |
2356 | char *paddr_str=get_cell(); | |
2357 | switch (sizeof(addr)) | |
2358 | { | |
2359 | case 8: | |
2360 | sprintf(paddr_str,"%08lx%08lx", | |
2361 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); | |
2362 | break; | |
2363 | case 4: | |
2364 | sprintf(paddr_str,"%08lx",(unsigned long)addr); | |
2365 | break; | |
2366 | case 2: | |
2367 | sprintf(paddr_str,"%04x",(unsigned short)(addr&0xffff)); | |
2368 | break; | |
2369 | default: | |
2370 | sprintf(paddr_str,"%x",addr); | |
2371 | } | |
2372 | return paddr_str; | |
2373 | } | |
2374 | ||
2375 | char* | |
8ac57fbd | 2376 | pr_uword64 (uword64 addr) |
c906108c SS |
2377 | { |
2378 | char *paddr_str=get_cell(); | |
2379 | sprintf(paddr_str,"%08lx%08lx", | |
2380 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); | |
2381 | return paddr_str; | |
2382 | } | |
2383 | ||
2384 | ||
2385 | void | |
2386 | mips_core_signal (SIM_DESC sd, | |
2387 | sim_cpu *cpu, | |
2388 | sim_cia cia, | |
2389 | unsigned map, | |
2390 | int nr_bytes, | |
2391 | address_word addr, | |
2392 | transfer_type transfer, | |
2393 | sim_core_signals sig) | |
2394 | { | |
2395 | const char *copy = (transfer == read_transfer ? "read" : "write"); | |
2396 | address_word ip = CIA_ADDR (cia); | |
2397 | ||
2398 | switch (sig) | |
2399 | { | |
2400 | case sim_core_unmapped_signal: | |
2401 | sim_io_eprintf (sd, "mips-core: %d byte %s to unmapped address 0x%lx at 0x%lx\n", | |
2402 | nr_bytes, copy, | |
2403 | (unsigned long) addr, (unsigned long) ip); | |
2404 | COP0_BADVADDR = addr; | |
2405 | SignalExceptionDataReference(); | |
2406 | break; | |
2407 | ||
2408 | case sim_core_unaligned_signal: | |
2409 | sim_io_eprintf (sd, "mips-core: %d byte %s to unaligned address 0x%lx at 0x%lx\n", | |
2410 | nr_bytes, copy, | |
2411 | (unsigned long) addr, (unsigned long) ip); | |
2412 | COP0_BADVADDR = addr; | |
2413 | if(transfer == read_transfer) | |
2414 | SignalExceptionAddressLoad(); | |
2415 | else | |
2416 | SignalExceptionAddressStore(); | |
2417 | break; | |
2418 | ||
2419 | default: | |
2420 | sim_engine_abort (sd, cpu, cia, | |
2421 | "mips_core_signal - internal error - bad switch"); | |
2422 | } | |
2423 | } | |
2424 | ||
2425 | ||
2426 | void | |
2427 | mips_cpu_exception_trigger(SIM_DESC sd, sim_cpu* cpu, address_word cia) | |
2428 | { | |
2429 | ASSERT(cpu != NULL); | |
2430 | ||
2431 | if(cpu->exc_suspended > 0) | |
2432 | sim_io_eprintf(sd, "Warning, nested exception triggered (%d)\n", cpu->exc_suspended); | |
2433 | ||
2434 | PC = cia; | |
2435 | memcpy(cpu->exc_trigger_registers, cpu->registers, sizeof(cpu->exc_trigger_registers)); | |
2436 | cpu->exc_suspended = 0; | |
2437 | } | |
2438 | ||
2439 | void | |
2440 | mips_cpu_exception_suspend(SIM_DESC sd, sim_cpu* cpu, int exception) | |
2441 | { | |
2442 | ASSERT(cpu != NULL); | |
2443 | ||
2444 | if(cpu->exc_suspended > 0) | |
2445 | sim_io_eprintf(sd, "Warning, nested exception signal (%d then %d)\n", | |
2446 | cpu->exc_suspended, exception); | |
2447 | ||
2448 | memcpy(cpu->exc_suspend_registers, cpu->registers, sizeof(cpu->exc_suspend_registers)); | |
2449 | memcpy(cpu->registers, cpu->exc_trigger_registers, sizeof(cpu->registers)); | |
2450 | cpu->exc_suspended = exception; | |
2451 | } | |
2452 | ||
2453 | void | |
2454 | mips_cpu_exception_resume(SIM_DESC sd, sim_cpu* cpu, int exception) | |
2455 | { | |
2456 | ASSERT(cpu != NULL); | |
2457 | ||
2458 | if(exception == 0 && cpu->exc_suspended > 0) | |
2459 | { | |
2460 | /* warn not for breakpoints */ | |
2461 | if(cpu->exc_suspended != sim_signal_to_host(sd, SIM_SIGTRAP)) | |
2462 | sim_io_eprintf(sd, "Warning, resuming but ignoring pending exception signal (%d)\n", | |
2463 | cpu->exc_suspended); | |
2464 | } | |
2465 | else if(exception != 0 && cpu->exc_suspended > 0) | |
2466 | { | |
2467 | if(exception != cpu->exc_suspended) | |
2468 | sim_io_eprintf(sd, "Warning, resuming with mismatched exception signal (%d vs %d)\n", | |
2469 | cpu->exc_suspended, exception); | |
2470 | ||
2471 | memcpy(cpu->registers, cpu->exc_suspend_registers, sizeof(cpu->registers)); | |
2472 | } | |
2473 | else if(exception != 0 && cpu->exc_suspended == 0) | |
2474 | { | |
2475 | sim_io_eprintf(sd, "Warning, ignoring spontanous exception signal (%d)\n", exception); | |
2476 | } | |
2477 | cpu->exc_suspended = 0; | |
2478 | } | |
2479 | ||
2480 | ||
2481 | /*---------------------------------------------------------------------------*/ | |
2482 | /*> EOF interp.c <*/ |