| 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 | |
| 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 | |
| 25 | /* The TRACE manifests enable the provision of extra features. If they |
| 26 | are not defined then a simpler (quicker) simulator is constructed |
| 27 | without the required run-time checks, etc. */ |
| 28 | #if 1 /* 0 to allow user build selection, 1 to force inclusion */ |
| 29 | #define TRACE (1) |
| 30 | #endif |
| 31 | |
| 32 | #include "config.h" |
| 33 | #include "bfd.h" |
| 34 | #include "sim-main.h" |
| 35 | #include "sim-utils.h" |
| 36 | #include "sim-options.h" |
| 37 | #include "sim-assert.h" |
| 38 | #include "sim-hw.h" |
| 39 | |
| 40 | #include "itable.h" |
| 41 | |
| 42 | |
| 43 | #include "config.h" |
| 44 | |
| 45 | #include <stdio.h> |
| 46 | #include <stdarg.h> |
| 47 | #include <ansidecl.h> |
| 48 | #include <ctype.h> |
| 49 | #include <limits.h> |
| 50 | #include <math.h> |
| 51 | #ifdef HAVE_STDLIB_H |
| 52 | #include <stdlib.h> |
| 53 | #endif |
| 54 | #ifdef HAVE_STRING_H |
| 55 | #include <string.h> |
| 56 | #else |
| 57 | #ifdef HAVE_STRINGS_H |
| 58 | #include <strings.h> |
| 59 | #endif |
| 60 | #endif |
| 61 | |
| 62 | #include "getopt.h" |
| 63 | #include "libiberty.h" |
| 64 | #include "bfd.h" |
| 65 | #include "gdb/callback.h" /* GDB simulator callback interface */ |
| 66 | #include "gdb/remote-sim.h" /* GDB simulator interface */ |
| 67 | |
| 68 | char* pr_addr (SIM_ADDR addr); |
| 69 | char* pr_uword64 (uword64 addr); |
| 70 | |
| 71 | |
| 72 | /* Within interp.c we refer to the sim_state and sim_cpu directly. */ |
| 73 | #define CPU cpu |
| 74 | #define SD sd |
| 75 | |
| 76 | |
| 77 | /* The following reserved instruction value is used when a simulator |
| 78 | trap is required. NOTE: Care must be taken, since this value may be |
| 79 | used in later revisions of the MIPS ISA. */ |
| 80 | |
| 81 | #define RSVD_INSTRUCTION (0x00000005) |
| 82 | #define RSVD_INSTRUCTION_MASK (0xFC00003F) |
| 83 | |
| 84 | #define RSVD_INSTRUCTION_ARG_SHIFT 6 |
| 85 | #define RSVD_INSTRUCTION_ARG_MASK 0xFFFFF |
| 86 | |
| 87 | |
| 88 | /* Bits in the Debug register */ |
| 89 | #define Debug_DBD 0x80000000 /* Debug Branch Delay */ |
| 90 | #define Debug_DM 0x40000000 /* Debug Mode */ |
| 91 | #define Debug_DBp 0x00000002 /* Debug Breakpoint indicator */ |
| 92 | |
| 93 | /*---------------------------------------------------------------------------*/ |
| 94 | /*-- GDB simulator interface ------------------------------------------------*/ |
| 95 | /*---------------------------------------------------------------------------*/ |
| 96 | |
| 97 | static void ColdReset (SIM_DESC sd); |
| 98 | |
| 99 | /*---------------------------------------------------------------------------*/ |
| 100 | |
| 101 | |
| 102 | |
| 103 | #define DELAYSLOT() {\ |
| 104 | if (STATE & simDELAYSLOT)\ |
| 105 | sim_io_eprintf(sd,"Delay slot already activated (branch in delay slot?)\n");\ |
| 106 | STATE |= simDELAYSLOT;\ |
| 107 | } |
| 108 | |
| 109 | #define JALDELAYSLOT() {\ |
| 110 | DELAYSLOT ();\ |
| 111 | STATE |= simJALDELAYSLOT;\ |
| 112 | } |
| 113 | |
| 114 | #define NULLIFY() {\ |
| 115 | STATE &= ~simDELAYSLOT;\ |
| 116 | STATE |= simSKIPNEXT;\ |
| 117 | } |
| 118 | |
| 119 | #define CANCELDELAYSLOT() {\ |
| 120 | DSSTATE = 0;\ |
| 121 | STATE &= ~(simDELAYSLOT | simJALDELAYSLOT);\ |
| 122 | } |
| 123 | |
| 124 | #define INDELAYSLOT() ((STATE & simDELAYSLOT) != 0) |
| 125 | #define INJALDELAYSLOT() ((STATE & simJALDELAYSLOT) != 0) |
| 126 | |
| 127 | /* Note that the monitor code essentially assumes this layout of memory. |
| 128 | If you change these, change the monitor code, too. */ |
| 129 | /* FIXME Currently addresses are truncated to 32-bits, see |
| 130 | mips/sim-main.c:address_translation(). If that changes, then these |
| 131 | values will need to be extended, and tested for more carefully. */ |
| 132 | #define K0BASE (0x80000000) |
| 133 | #define K0SIZE (0x20000000) |
| 134 | #define K1BASE (0xA0000000) |
| 135 | #define K1SIZE (0x20000000) |
| 136 | |
| 137 | /* Simple run-time monitor support. |
| 138 | |
| 139 | We emulate the monitor by placing magic reserved instructions at |
| 140 | the monitor's entry points; when we hit these instructions, instead |
| 141 | of raising an exception (as we would normally), we look at the |
| 142 | instruction and perform the appropriate monitory operation. |
| 143 | |
| 144 | `*_monitor_base' are the physical addresses at which the corresponding |
| 145 | monitor vectors are located. `0' means none. By default, |
| 146 | install all three. |
| 147 | The RSVD_INSTRUCTION... macros specify the magic instructions we |
| 148 | use at the monitor entry points. */ |
| 149 | static int firmware_option_p = 0; |
| 150 | static SIM_ADDR idt_monitor_base = 0xBFC00000; |
| 151 | static SIM_ADDR pmon_monitor_base = 0xBFC00500; |
| 152 | static SIM_ADDR lsipmon_monitor_base = 0xBFC00200; |
| 153 | |
| 154 | static SIM_RC sim_firmware_command (SIM_DESC sd, char* arg); |
| 155 | |
| 156 | |
| 157 | #define MEM_SIZE (8 << 20) /* 8 MBytes */ |
| 158 | |
| 159 | |
| 160 | #if defined(TRACE) |
| 161 | static char *tracefile = "trace.din"; /* default filename for trace log */ |
| 162 | FILE *tracefh = NULL; |
| 163 | static void open_trace (SIM_DESC sd); |
| 164 | #endif /* TRACE */ |
| 165 | |
| 166 | static const char * get_insn_name (sim_cpu *, int); |
| 167 | |
| 168 | /* simulation target board. NULL=canonical */ |
| 169 | static char* board = NULL; |
| 170 | |
| 171 | |
| 172 | static DECLARE_OPTION_HANDLER (mips_option_handler); |
| 173 | |
| 174 | enum { |
| 175 | OPTION_DINERO_TRACE = OPTION_START, |
| 176 | OPTION_DINERO_FILE, |
| 177 | OPTION_FIRMWARE, |
| 178 | OPTION_INFO_MEMORY, |
| 179 | OPTION_BOARD |
| 180 | }; |
| 181 | |
| 182 | static int display_mem_info = 0; |
| 183 | |
| 184 | static SIM_RC |
| 185 | mips_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt, char *arg, |
| 186 | int is_command) |
| 187 | { |
| 188 | int cpu_nr; |
| 189 | switch (opt) |
| 190 | { |
| 191 | case OPTION_DINERO_TRACE: /* ??? */ |
| 192 | #if defined(TRACE) |
| 193 | /* Eventually the simTRACE flag could be treated as a toggle, to |
| 194 | allow external control of the program points being traced |
| 195 | (i.e. only from main onwards, excluding the run-time setup, |
| 196 | etc.). */ |
| 197 | for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++) |
| 198 | { |
| 199 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); |
| 200 | if (arg == NULL) |
| 201 | STATE |= simTRACE; |
| 202 | else if (strcmp (arg, "yes") == 0) |
| 203 | STATE |= simTRACE; |
| 204 | else if (strcmp (arg, "no") == 0) |
| 205 | STATE &= ~simTRACE; |
| 206 | else if (strcmp (arg, "on") == 0) |
| 207 | STATE |= simTRACE; |
| 208 | else if (strcmp (arg, "off") == 0) |
| 209 | STATE &= ~simTRACE; |
| 210 | else |
| 211 | { |
| 212 | fprintf (stderr, "Unrecognized dinero-trace option `%s'\n", arg); |
| 213 | return SIM_RC_FAIL; |
| 214 | } |
| 215 | } |
| 216 | return SIM_RC_OK; |
| 217 | #else /* !TRACE */ |
| 218 | fprintf(stderr,"\ |
| 219 | Simulator constructed without dinero tracing support (for performance).\n\ |
| 220 | Re-compile simulator with \"-DTRACE\" to enable this option.\n"); |
| 221 | return SIM_RC_FAIL; |
| 222 | #endif /* !TRACE */ |
| 223 | |
| 224 | case OPTION_DINERO_FILE: |
| 225 | #if defined(TRACE) |
| 226 | if (optarg != NULL) { |
| 227 | char *tmp; |
| 228 | tmp = (char *)malloc(strlen(optarg) + 1); |
| 229 | if (tmp == NULL) |
| 230 | { |
| 231 | sim_io_printf(sd,"Failed to allocate buffer for tracefile name \"%s\"\n",optarg); |
| 232 | return SIM_RC_FAIL; |
| 233 | } |
| 234 | else { |
| 235 | strcpy(tmp,optarg); |
| 236 | tracefile = tmp; |
| 237 | sim_io_printf(sd,"Placing trace information into file \"%s\"\n",tracefile); |
| 238 | } |
| 239 | } |
| 240 | #endif /* TRACE */ |
| 241 | return SIM_RC_OK; |
| 242 | |
| 243 | case OPTION_FIRMWARE: |
| 244 | return sim_firmware_command (sd, arg); |
| 245 | |
| 246 | case OPTION_BOARD: |
| 247 | { |
| 248 | if (arg) |
| 249 | { |
| 250 | board = zalloc(strlen(arg) + 1); |
| 251 | strcpy(board, arg); |
| 252 | } |
| 253 | return SIM_RC_OK; |
| 254 | } |
| 255 | |
| 256 | case OPTION_INFO_MEMORY: |
| 257 | display_mem_info = 1; |
| 258 | break; |
| 259 | } |
| 260 | |
| 261 | return SIM_RC_OK; |
| 262 | } |
| 263 | |
| 264 | |
| 265 | static const OPTION mips_options[] = |
| 266 | { |
| 267 | { {"dinero-trace", optional_argument, NULL, OPTION_DINERO_TRACE}, |
| 268 | '\0', "on|off", "Enable dinero tracing", |
| 269 | mips_option_handler }, |
| 270 | { {"dinero-file", required_argument, NULL, OPTION_DINERO_FILE}, |
| 271 | '\0', "FILE", "Write dinero trace to FILE", |
| 272 | mips_option_handler }, |
| 273 | { {"firmware", required_argument, NULL, OPTION_FIRMWARE}, |
| 274 | '\0', "[idt|pmon|lsipmon|none][@ADDRESS]", "Emulate ROM monitor", |
| 275 | mips_option_handler }, |
| 276 | { {"board", required_argument, NULL, OPTION_BOARD}, |
| 277 | '\0', "none" /* rely on compile-time string concatenation for other options */ |
| 278 | |
| 279 | #define BOARD_JMR3904 "jmr3904" |
| 280 | "|" BOARD_JMR3904 |
| 281 | #define BOARD_JMR3904_PAL "jmr3904pal" |
| 282 | "|" BOARD_JMR3904_PAL |
| 283 | #define BOARD_JMR3904_DEBUG "jmr3904debug" |
| 284 | "|" BOARD_JMR3904_DEBUG |
| 285 | #define BOARD_BSP "bsp" |
| 286 | "|" BOARD_BSP |
| 287 | |
| 288 | , "Customize simulation for a particular board.", mips_option_handler }, |
| 289 | |
| 290 | /* These next two options have the same names as ones found in the |
| 291 | memory_options[] array in common/sim-memopt.c. This is because |
| 292 | the intention is to provide an alternative handler for those two |
| 293 | options. We need an alternative handler because the memory |
| 294 | regions are not set up until after the command line arguments |
| 295 | have been parsed, and so we cannot display the memory info whilst |
| 296 | processing the command line. There is a hack in sim_open to |
| 297 | remove these handlers when we want the real --memory-info option |
| 298 | to work. */ |
| 299 | { { "info-memory", no_argument, NULL, OPTION_INFO_MEMORY }, |
| 300 | '\0', NULL, "List configured memory regions", mips_option_handler }, |
| 301 | { { "memory-info", no_argument, NULL, OPTION_INFO_MEMORY }, |
| 302 | '\0', NULL, NULL, mips_option_handler }, |
| 303 | |
| 304 | { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL } |
| 305 | }; |
| 306 | |
| 307 | |
| 308 | int interrupt_pending; |
| 309 | |
| 310 | void |
| 311 | interrupt_event (SIM_DESC sd, void *data) |
| 312 | { |
| 313 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ |
| 314 | address_word cia = CIA_GET (cpu); |
| 315 | if (SR & status_IE) |
| 316 | { |
| 317 | interrupt_pending = 0; |
| 318 | SignalExceptionInterrupt (1); /* interrupt "1" */ |
| 319 | } |
| 320 | else if (!interrupt_pending) |
| 321 | sim_events_schedule (sd, 1, interrupt_event, data); |
| 322 | } |
| 323 | |
| 324 | |
| 325 | /*---------------------------------------------------------------------------*/ |
| 326 | /*-- Device registration hook -----------------------------------------------*/ |
| 327 | /*---------------------------------------------------------------------------*/ |
| 328 | static void device_init(SIM_DESC sd) { |
| 329 | #ifdef DEVICE_INIT |
| 330 | extern void register_devices(SIM_DESC); |
| 331 | register_devices(sd); |
| 332 | #endif |
| 333 | } |
| 334 | |
| 335 | /*---------------------------------------------------------------------------*/ |
| 336 | /*-- GDB simulator interface ------------------------------------------------*/ |
| 337 | /*---------------------------------------------------------------------------*/ |
| 338 | |
| 339 | SIM_DESC |
| 340 | sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv) |
| 341 | { |
| 342 | SIM_DESC sd = sim_state_alloc (kind, cb); |
| 343 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ |
| 344 | |
| 345 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); |
| 346 | |
| 347 | /* FIXME: watchpoints code shouldn't need this */ |
| 348 | STATE_WATCHPOINTS (sd)->pc = &(PC); |
| 349 | STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC); |
| 350 | STATE_WATCHPOINTS (sd)->interrupt_handler = interrupt_event; |
| 351 | |
| 352 | /* Initialize the mechanism for doing insn profiling. */ |
| 353 | CPU_INSN_NAME (cpu) = get_insn_name; |
| 354 | CPU_MAX_INSNS (cpu) = nr_itable_entries; |
| 355 | |
| 356 | STATE = 0; |
| 357 | |
| 358 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) |
| 359 | return 0; |
| 360 | sim_add_option_table (sd, NULL, mips_options); |
| 361 | |
| 362 | |
| 363 | /* getopt will print the error message so we just have to exit if this fails. |
| 364 | FIXME: Hmmm... in the case of gdb we need getopt to call |
| 365 | print_filtered. */ |
| 366 | if (sim_parse_args (sd, argv) != SIM_RC_OK) |
| 367 | { |
| 368 | /* Uninstall the modules to avoid memory leaks, |
| 369 | file descriptor leaks, etc. */ |
| 370 | sim_module_uninstall (sd); |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | /* handle board-specific memory maps */ |
| 375 | if (board == NULL) |
| 376 | { |
| 377 | /* Allocate core managed memory */ |
| 378 | sim_memopt *entry, *match = NULL; |
| 379 | address_word mem_size = 0; |
| 380 | int mapped = 0; |
| 381 | |
| 382 | /* For compatibility with the old code - under this (at level one) |
| 383 | are the kernel spaces K0 & K1. Both of these map to a single |
| 384 | smaller sub region */ |
| 385 | sim_do_command(sd," memory region 0x7fff8000,0x8000") ; /* MTZ- 32 k stack */ |
| 386 | |
| 387 | /* Look for largest memory region defined on command-line at |
| 388 | phys address 0. */ |
| 389 | #ifdef SIM_HAVE_FLATMEM |
| 390 | mem_size = STATE_MEM_SIZE (sd); |
| 391 | #endif |
| 392 | for (entry = STATE_MEMOPT (sd); entry != NULL; entry = entry->next) |
| 393 | { |
| 394 | /* If we find an entry at address 0, then we will end up |
| 395 | allocating a new buffer in the "memory alias" command |
| 396 | below. The region at address 0 will be deleted. */ |
| 397 | address_word size = (entry->modulo != 0 |
| 398 | ? entry->modulo : entry->nr_bytes); |
| 399 | if (entry->addr == 0 |
| 400 | && (!match || entry->level < match->level)) |
| 401 | match = entry; |
| 402 | else if (entry->addr == K0BASE || entry->addr == K1BASE) |
| 403 | mapped = 1; |
| 404 | else |
| 405 | { |
| 406 | sim_memopt *alias; |
| 407 | for (alias = entry->alias; alias != NULL; alias = alias->next) |
| 408 | { |
| 409 | if (alias->addr == 0 |
| 410 | && (!match || entry->level < match->level)) |
| 411 | match = entry; |
| 412 | else if (alias->addr == K0BASE || alias->addr == K1BASE) |
| 413 | mapped = 1; |
| 414 | } |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | if (!mapped) |
| 419 | { |
| 420 | if (match) |
| 421 | { |
| 422 | /* Get existing memory region size. */ |
| 423 | mem_size = (match->modulo != 0 |
| 424 | ? match->modulo : match->nr_bytes); |
| 425 | /* Delete old region. */ |
| 426 | sim_do_commandf (sd, "memory delete %d:0x%lx@%d", |
| 427 | match->space, match->addr, match->level); |
| 428 | } |
| 429 | else if (mem_size == 0) |
| 430 | mem_size = MEM_SIZE; |
| 431 | /* Limit to KSEG1 size (512MB) */ |
| 432 | if (mem_size > K1SIZE) |
| 433 | mem_size = K1SIZE; |
| 434 | /* memory alias K1BASE@1,K1SIZE%MEMSIZE,K0BASE */ |
| 435 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx%%0x%lx,0x%0x", |
| 436 | K1BASE, K1SIZE, (long)mem_size, K0BASE); |
| 437 | } |
| 438 | |
| 439 | device_init(sd); |
| 440 | } |
| 441 | else if (board != NULL |
| 442 | && (strcmp(board, BOARD_BSP) == 0)) |
| 443 | { |
| 444 | int i; |
| 445 | |
| 446 | STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT; |
| 447 | |
| 448 | /* ROM: 0x9FC0_0000 - 0x9FFF_FFFF and 0xBFC0_0000 - 0xBFFF_FFFF */ |
| 449 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", |
| 450 | 0x9FC00000, |
| 451 | 4 * 1024 * 1024, /* 4 MB */ |
| 452 | 0xBFC00000); |
| 453 | |
| 454 | /* SRAM: 0x8000_0000 - 0x803F_FFFF and 0xA000_0000 - 0xA03F_FFFF */ |
| 455 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", |
| 456 | 0x80000000, |
| 457 | 4 * 1024 * 1024, /* 4 MB */ |
| 458 | 0xA0000000); |
| 459 | |
| 460 | /* DRAM: 0x8800_0000 - 0x89FF_FFFF and 0xA800_0000 - 0xA9FF_FFFF */ |
| 461 | for (i=0; i<8; i++) /* 32 MB total */ |
| 462 | { |
| 463 | unsigned size = 4 * 1024 * 1024; /* 4 MB */ |
| 464 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", |
| 465 | 0x88000000 + (i * size), |
| 466 | size, |
| 467 | 0xA8000000 + (i * size)); |
| 468 | } |
| 469 | } |
| 470 | #if (WITH_HW) |
| 471 | else if (board != NULL |
| 472 | && (strcmp(board, BOARD_JMR3904) == 0 || |
| 473 | strcmp(board, BOARD_JMR3904_PAL) == 0 || |
| 474 | strcmp(board, BOARD_JMR3904_DEBUG) == 0)) |
| 475 | { |
| 476 | /* match VIRTUAL memory layout of JMR-TX3904 board */ |
| 477 | int i; |
| 478 | |
| 479 | /* --- disable monitor unless forced on by user --- */ |
| 480 | |
| 481 | if (! firmware_option_p) |
| 482 | { |
| 483 | idt_monitor_base = 0; |
| 484 | pmon_monitor_base = 0; |
| 485 | lsipmon_monitor_base = 0; |
| 486 | } |
| 487 | |
| 488 | /* --- environment --- */ |
| 489 | |
| 490 | STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT; |
| 491 | |
| 492 | /* --- memory --- */ |
| 493 | |
| 494 | /* ROM: 0x9FC0_0000 - 0x9FFF_FFFF and 0xBFC0_0000 - 0xBFFF_FFFF */ |
| 495 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", |
| 496 | 0x9FC00000, |
| 497 | 4 * 1024 * 1024, /* 4 MB */ |
| 498 | 0xBFC00000); |
| 499 | |
| 500 | /* SRAM: 0x8000_0000 - 0x803F_FFFF and 0xA000_0000 - 0xA03F_FFFF */ |
| 501 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", |
| 502 | 0x80000000, |
| 503 | 4 * 1024 * 1024, /* 4 MB */ |
| 504 | 0xA0000000); |
| 505 | |
| 506 | /* DRAM: 0x8800_0000 - 0x89FF_FFFF and 0xA800_0000 - 0xA9FF_FFFF */ |
| 507 | for (i=0; i<8; i++) /* 32 MB total */ |
| 508 | { |
| 509 | unsigned size = 4 * 1024 * 1024; /* 4 MB */ |
| 510 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx,0x%0x", |
| 511 | 0x88000000 + (i * size), |
| 512 | size, |
| 513 | 0xA8000000 + (i * size)); |
| 514 | } |
| 515 | |
| 516 | /* Dummy memory regions for unsimulated devices - sorted by address */ |
| 517 | |
| 518 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB1000000, 0x400); /* ISA I/O */ |
| 519 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB2100000, 0x004); /* ISA ctl */ |
| 520 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB2500000, 0x004); /* LED/switch */ |
| 521 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB2700000, 0x004); /* RTC */ |
| 522 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xB3C00000, 0x004); /* RTC */ |
| 523 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFF8000, 0x900); /* DRAMC */ |
| 524 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFF9000, 0x200); /* EBIF */ |
| 525 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFFE000, 0x01c); /* EBIF */ |
| 526 | sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx", 0xFFFFF500, 0x300); /* PIO */ |
| 527 | |
| 528 | |
| 529 | /* --- simulated devices --- */ |
| 530 | sim_hw_parse (sd, "/tx3904irc@0xffffc000/reg 0xffffc000 0x20"); |
| 531 | sim_hw_parse (sd, "/tx3904cpu"); |
| 532 | sim_hw_parse (sd, "/tx3904tmr@0xfffff000/reg 0xfffff000 0x100"); |
| 533 | sim_hw_parse (sd, "/tx3904tmr@0xfffff100/reg 0xfffff100 0x100"); |
| 534 | sim_hw_parse (sd, "/tx3904tmr@0xfffff200/reg 0xfffff200 0x100"); |
| 535 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/reg 0xfffff300 0x100"); |
| 536 | { |
| 537 | /* FIXME: poking at dv-sockser internals, use tcp backend if |
| 538 | --sockser_addr option was given.*/ |
| 539 | extern char* sockser_addr; |
| 540 | if(sockser_addr == NULL) |
| 541 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/backend stdio"); |
| 542 | else |
| 543 | sim_hw_parse (sd, "/tx3904sio@0xfffff300/backend tcp"); |
| 544 | } |
| 545 | sim_hw_parse (sd, "/tx3904sio@0xfffff400/reg 0xfffff400 0x100"); |
| 546 | sim_hw_parse (sd, "/tx3904sio@0xfffff400/backend stdio"); |
| 547 | |
| 548 | /* -- device connections --- */ |
| 549 | sim_hw_parse (sd, "/tx3904irc > ip level /tx3904cpu"); |
| 550 | sim_hw_parse (sd, "/tx3904tmr@0xfffff000 > int tmr0 /tx3904irc"); |
| 551 | sim_hw_parse (sd, "/tx3904tmr@0xfffff100 > int tmr1 /tx3904irc"); |
| 552 | sim_hw_parse (sd, "/tx3904tmr@0xfffff200 > int tmr2 /tx3904irc"); |
| 553 | sim_hw_parse (sd, "/tx3904sio@0xfffff300 > int sio0 /tx3904irc"); |
| 554 | sim_hw_parse (sd, "/tx3904sio@0xfffff400 > int sio1 /tx3904irc"); |
| 555 | |
| 556 | /* add PAL timer & I/O module */ |
| 557 | if(! strcmp(board, BOARD_JMR3904_PAL)) |
| 558 | { |
| 559 | /* the device */ |
| 560 | sim_hw_parse (sd, "/pal@0xffff0000"); |
| 561 | sim_hw_parse (sd, "/pal@0xffff0000/reg 0xffff0000 64"); |
| 562 | |
| 563 | /* wire up interrupt ports to irc */ |
| 564 | sim_hw_parse (sd, "/pal@0x31000000 > countdown tmr0 /tx3904irc"); |
| 565 | sim_hw_parse (sd, "/pal@0x31000000 > timer tmr1 /tx3904irc"); |
| 566 | sim_hw_parse (sd, "/pal@0x31000000 > int int0 /tx3904irc"); |
| 567 | } |
| 568 | |
| 569 | if(! strcmp(board, BOARD_JMR3904_DEBUG)) |
| 570 | { |
| 571 | /* -- DEBUG: glue interrupt generators --- */ |
| 572 | sim_hw_parse (sd, "/glue@0xffff0000/reg 0xffff0000 0x50"); |
| 573 | sim_hw_parse (sd, "/glue@0xffff0000 > int0 int0 /tx3904irc"); |
| 574 | sim_hw_parse (sd, "/glue@0xffff0000 > int1 int1 /tx3904irc"); |
| 575 | sim_hw_parse (sd, "/glue@0xffff0000 > int2 int2 /tx3904irc"); |
| 576 | sim_hw_parse (sd, "/glue@0xffff0000 > int3 int3 /tx3904irc"); |
| 577 | sim_hw_parse (sd, "/glue@0xffff0000 > int4 int4 /tx3904irc"); |
| 578 | sim_hw_parse (sd, "/glue@0xffff0000 > int5 int5 /tx3904irc"); |
| 579 | sim_hw_parse (sd, "/glue@0xffff0000 > int6 int6 /tx3904irc"); |
| 580 | sim_hw_parse (sd, "/glue@0xffff0000 > int7 int7 /tx3904irc"); |
| 581 | sim_hw_parse (sd, "/glue@0xffff0000 > int8 dmac0 /tx3904irc"); |
| 582 | sim_hw_parse (sd, "/glue@0xffff0000 > int9 dmac1 /tx3904irc"); |
| 583 | sim_hw_parse (sd, "/glue@0xffff0000 > int10 dmac2 /tx3904irc"); |
| 584 | sim_hw_parse (sd, "/glue@0xffff0000 > int11 dmac3 /tx3904irc"); |
| 585 | sim_hw_parse (sd, "/glue@0xffff0000 > int12 sio0 /tx3904irc"); |
| 586 | sim_hw_parse (sd, "/glue@0xffff0000 > int13 sio1 /tx3904irc"); |
| 587 | sim_hw_parse (sd, "/glue@0xffff0000 > int14 tmr0 /tx3904irc"); |
| 588 | sim_hw_parse (sd, "/glue@0xffff0000 > int15 tmr1 /tx3904irc"); |
| 589 | sim_hw_parse (sd, "/glue@0xffff0000 > int16 tmr2 /tx3904irc"); |
| 590 | sim_hw_parse (sd, "/glue@0xffff0000 > int17 nmi /tx3904cpu"); |
| 591 | } |
| 592 | |
| 593 | device_init(sd); |
| 594 | } |
| 595 | #endif |
| 596 | |
| 597 | if (display_mem_info) |
| 598 | { |
| 599 | struct option_list * ol; |
| 600 | struct option_list * prev; |
| 601 | |
| 602 | /* This is a hack. We want to execute the real --memory-info command |
| 603 | line switch which is handled in common/sim-memopts.c, not the |
| 604 | override we have defined in this file. So we remove the |
| 605 | mips_options array from the state options list. This is safe |
| 606 | because we have now processed all of the command line. */ |
| 607 | for (ol = STATE_OPTIONS (sd), prev = NULL; |
| 608 | ol != NULL; |
| 609 | prev = ol, ol = ol->next) |
| 610 | if (ol->options == mips_options) |
| 611 | break; |
| 612 | |
| 613 | SIM_ASSERT (ol != NULL); |
| 614 | |
| 615 | if (prev == NULL) |
| 616 | STATE_OPTIONS (sd) = ol->next; |
| 617 | else |
| 618 | prev->next = ol->next; |
| 619 | |
| 620 | sim_do_commandf (sd, "memory-info"); |
| 621 | } |
| 622 | |
| 623 | /* check for/establish the a reference program image */ |
| 624 | if (sim_analyze_program (sd, |
| 625 | (STATE_PROG_ARGV (sd) != NULL |
| 626 | ? *STATE_PROG_ARGV (sd) |
| 627 | : NULL), |
| 628 | abfd) != SIM_RC_OK) |
| 629 | { |
| 630 | sim_module_uninstall (sd); |
| 631 | return 0; |
| 632 | } |
| 633 | |
| 634 | /* Configure/verify the target byte order and other runtime |
| 635 | configuration options */ |
| 636 | if (sim_config (sd) != SIM_RC_OK) |
| 637 | { |
| 638 | sim_module_uninstall (sd); |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | if (sim_post_argv_init (sd) != SIM_RC_OK) |
| 643 | { |
| 644 | /* Uninstall the modules to avoid memory leaks, |
| 645 | file descriptor leaks, etc. */ |
| 646 | sim_module_uninstall (sd); |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | /* verify assumptions the simulator made about the host type system. |
| 651 | This macro does not return if there is a problem */ |
| 652 | SIM_ASSERT (sizeof(int) == (4 * sizeof(char))); |
| 653 | SIM_ASSERT (sizeof(word64) == (8 * sizeof(char))); |
| 654 | |
| 655 | /* This is NASTY, in that we are assuming the size of specific |
| 656 | registers: */ |
| 657 | { |
| 658 | int rn; |
| 659 | for (rn = 0; (rn < (LAST_EMBED_REGNUM + 1)); rn++) |
| 660 | { |
| 661 | if (rn < 32) |
| 662 | cpu->register_widths[rn] = WITH_TARGET_WORD_BITSIZE; |
| 663 | else if ((rn >= FGR_BASE) && (rn < (FGR_BASE + NR_FGR))) |
| 664 | cpu->register_widths[rn] = WITH_TARGET_FLOATING_POINT_BITSIZE; |
| 665 | else if ((rn >= 33) && (rn <= 37)) |
| 666 | cpu->register_widths[rn] = WITH_TARGET_WORD_BITSIZE; |
| 667 | else if ((rn == SRIDX) |
| 668 | || (rn == FCR0IDX) |
| 669 | || (rn == FCR31IDX) |
| 670 | || ((rn >= 72) && (rn <= 89))) |
| 671 | cpu->register_widths[rn] = 32; |
| 672 | else |
| 673 | cpu->register_widths[rn] = 0; |
| 674 | } |
| 675 | |
| 676 | |
| 677 | } |
| 678 | |
| 679 | #if defined(TRACE) |
| 680 | if (STATE & simTRACE) |
| 681 | open_trace(sd); |
| 682 | #endif /* TRACE */ |
| 683 | |
| 684 | /* |
| 685 | sim_io_eprintf (sd, "idt@%x pmon@%x lsipmon@%x\n", |
| 686 | idt_monitor_base, |
| 687 | pmon_monitor_base, |
| 688 | lsipmon_monitor_base); |
| 689 | */ |
| 690 | |
| 691 | /* Write the monitor trap address handlers into the monitor (eeprom) |
| 692 | address space. This can only be done once the target endianness |
| 693 | has been determined. */ |
| 694 | if (idt_monitor_base != 0) |
| 695 | { |
| 696 | unsigned loop; |
| 697 | unsigned idt_monitor_size = 1 << 11; |
| 698 | |
| 699 | /* the default monitor region */ |
| 700 | sim_do_commandf (sd, "memory region 0x%x,0x%x", |
| 701 | idt_monitor_base, idt_monitor_size); |
| 702 | |
| 703 | /* Entry into the IDT monitor is via fixed address vectors, and |
| 704 | not using machine instructions. To avoid clashing with use of |
| 705 | the MIPS TRAP system, we place our own (simulator specific) |
| 706 | "undefined" instructions into the relevant vector slots. */ |
| 707 | for (loop = 0; (loop < idt_monitor_size); loop += 4) |
| 708 | { |
| 709 | address_word vaddr = (idt_monitor_base + loop); |
| 710 | unsigned32 insn = (RSVD_INSTRUCTION | |
| 711 | (((loop >> 2) & RSVD_INSTRUCTION_ARG_MASK) |
| 712 | << RSVD_INSTRUCTION_ARG_SHIFT)); |
| 713 | H2T (insn); |
| 714 | sim_write (sd, vaddr, (unsigned char *)&insn, sizeof (insn)); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | if ((pmon_monitor_base != 0) || (lsipmon_monitor_base != 0)) |
| 719 | { |
| 720 | /* The PMON monitor uses the same address space, but rather than |
| 721 | branching into it the address of a routine is loaded. We can |
| 722 | cheat for the moment, and direct the PMON routine to IDT style |
| 723 | instructions within the monitor space. This relies on the IDT |
| 724 | monitor not using the locations from 0xBFC00500 onwards as its |
| 725 | entry points.*/ |
| 726 | unsigned loop; |
| 727 | for (loop = 0; (loop < 24); loop++) |
| 728 | { |
| 729 | unsigned32 value = ((0x500 - 8) / 8); /* default UNDEFINED reason code */ |
| 730 | switch (loop) |
| 731 | { |
| 732 | case 0: /* read */ |
| 733 | value = 7; |
| 734 | break; |
| 735 | case 1: /* write */ |
| 736 | value = 8; |
| 737 | break; |
| 738 | case 2: /* open */ |
| 739 | value = 6; |
| 740 | break; |
| 741 | case 3: /* close */ |
| 742 | value = 10; |
| 743 | break; |
| 744 | case 5: /* printf */ |
| 745 | value = ((0x500 - 16) / 8); /* not an IDT reason code */ |
| 746 | break; |
| 747 | case 8: /* cliexit */ |
| 748 | value = 17; |
| 749 | break; |
| 750 | case 11: /* flush_cache */ |
| 751 | value = 28; |
| 752 | break; |
| 753 | } |
| 754 | |
| 755 | SIM_ASSERT (idt_monitor_base != 0); |
| 756 | value = ((unsigned int) idt_monitor_base + (value * 8)); |
| 757 | H2T (value); |
| 758 | |
| 759 | if (pmon_monitor_base != 0) |
| 760 | { |
| 761 | address_word vaddr = (pmon_monitor_base + (loop * 4)); |
| 762 | sim_write (sd, vaddr, (unsigned char *)&value, sizeof (value)); |
| 763 | } |
| 764 | |
| 765 | if (lsipmon_monitor_base != 0) |
| 766 | { |
| 767 | address_word vaddr = (lsipmon_monitor_base + (loop * 4)); |
| 768 | sim_write (sd, vaddr, (unsigned char *)&value, sizeof (value)); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | /* Write an abort sequence into the TRAP (common) exception vector |
| 773 | addresses. This is to catch code executing a TRAP (et.al.) |
| 774 | instruction without installing a trap handler. */ |
| 775 | if ((idt_monitor_base != 0) || |
| 776 | (pmon_monitor_base != 0) || |
| 777 | (lsipmon_monitor_base != 0)) |
| 778 | { |
| 779 | unsigned32 halt[2] = { 0x2404002f /* addiu r4, r0, 47 */, |
| 780 | HALT_INSTRUCTION /* BREAK */ }; |
| 781 | H2T (halt[0]); |
| 782 | H2T (halt[1]); |
| 783 | sim_write (sd, 0x80000000, (unsigned char *) halt, sizeof (halt)); |
| 784 | sim_write (sd, 0x80000180, (unsigned char *) halt, sizeof (halt)); |
| 785 | sim_write (sd, 0x80000200, (unsigned char *) halt, sizeof (halt)); |
| 786 | /* XXX: Write here unconditionally? */ |
| 787 | sim_write (sd, 0xBFC00200, (unsigned char *) halt, sizeof (halt)); |
| 788 | sim_write (sd, 0xBFC00380, (unsigned char *) halt, sizeof (halt)); |
| 789 | sim_write (sd, 0xBFC00400, (unsigned char *) halt, sizeof (halt)); |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | |
| 794 | |
| 795 | return sd; |
| 796 | } |
| 797 | |
| 798 | #if defined(TRACE) |
| 799 | static void |
| 800 | open_trace (SIM_DESC sd) |
| 801 | { |
| 802 | tracefh = fopen(tracefile,"wb+"); |
| 803 | if (tracefh == NULL) |
| 804 | { |
| 805 | sim_io_eprintf(sd,"Failed to create file \"%s\", writing trace information to stderr.\n",tracefile); |
| 806 | tracefh = stderr; |
| 807 | } |
| 808 | } |
| 809 | #endif /* TRACE */ |
| 810 | |
| 811 | /* Return name of an insn, used by insn profiling. */ |
| 812 | static const char * |
| 813 | get_insn_name (sim_cpu *cpu, int i) |
| 814 | { |
| 815 | return itable[i].name; |
| 816 | } |
| 817 | |
| 818 | void |
| 819 | sim_close (SIM_DESC sd, int quitting) |
| 820 | { |
| 821 | #ifdef DEBUG |
| 822 | printf("DBG: sim_close: entered (quitting = %d)\n",quitting); |
| 823 | #endif |
| 824 | |
| 825 | |
| 826 | /* "quitting" is non-zero if we cannot hang on errors */ |
| 827 | |
| 828 | /* shut down modules */ |
| 829 | sim_module_uninstall (sd); |
| 830 | |
| 831 | /* Ensure that any resources allocated through the callback |
| 832 | mechanism are released: */ |
| 833 | sim_io_shutdown (sd); |
| 834 | |
| 835 | #if defined(TRACE) |
| 836 | if (tracefh != NULL && tracefh != stderr) |
| 837 | fclose(tracefh); |
| 838 | tracefh = NULL; |
| 839 | #endif /* TRACE */ |
| 840 | |
| 841 | /* FIXME - free SD */ |
| 842 | |
| 843 | return; |
| 844 | } |
| 845 | |
| 846 | |
| 847 | int |
| 848 | sim_write (SIM_DESC sd, SIM_ADDR addr, const unsigned char *buffer, int size) |
| 849 | { |
| 850 | int index; |
| 851 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ |
| 852 | |
| 853 | /* Return the number of bytes written, or zero if error. */ |
| 854 | #ifdef DEBUG |
| 855 | sim_io_printf(sd,"sim_write(0x%s,buffer,%d);\n",pr_addr(addr),size); |
| 856 | #endif |
| 857 | |
| 858 | /* We use raw read and write routines, since we do not want to count |
| 859 | the GDB memory accesses in our statistics gathering. */ |
| 860 | |
| 861 | for (index = 0; index < size; index++) |
| 862 | { |
| 863 | address_word vaddr = (address_word)addr + index; |
| 864 | address_word paddr; |
| 865 | int cca; |
| 866 | if (!address_translation (SD, CPU, NULL_CIA, vaddr, isDATA, isSTORE, &paddr, &cca, isRAW)) |
| 867 | break; |
| 868 | if (sim_core_write_buffer (SD, CPU, read_map, buffer + index, paddr, 1) != 1) |
| 869 | break; |
| 870 | } |
| 871 | |
| 872 | return(index); |
| 873 | } |
| 874 | |
| 875 | int |
| 876 | sim_read (SIM_DESC sd, SIM_ADDR addr, unsigned char *buffer, int size) |
| 877 | { |
| 878 | int index; |
| 879 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ |
| 880 | |
| 881 | /* Return the number of bytes read, or zero if error. */ |
| 882 | #ifdef DEBUG |
| 883 | sim_io_printf(sd,"sim_read(0x%s,buffer,%d);\n",pr_addr(addr),size); |
| 884 | #endif /* DEBUG */ |
| 885 | |
| 886 | for (index = 0; (index < size); index++) |
| 887 | { |
| 888 | address_word vaddr = (address_word)addr + index; |
| 889 | address_word paddr; |
| 890 | int cca; |
| 891 | if (!address_translation (SD, CPU, NULL_CIA, vaddr, isDATA, isLOAD, &paddr, &cca, isRAW)) |
| 892 | break; |
| 893 | if (sim_core_read_buffer (SD, CPU, read_map, buffer + index, paddr, 1) != 1) |
| 894 | break; |
| 895 | } |
| 896 | |
| 897 | return(index); |
| 898 | } |
| 899 | |
| 900 | int |
| 901 | sim_store_register (SIM_DESC sd, int rn, unsigned char *memory, int length) |
| 902 | { |
| 903 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ |
| 904 | /* NOTE: gdb (the client) stores registers in target byte order |
| 905 | while the simulator uses host byte order */ |
| 906 | #ifdef DEBUG |
| 907 | sim_io_printf(sd,"sim_store_register(%d,*memory=0x%s);\n",rn,pr_addr(*((SIM_ADDR *)memory))); |
| 908 | #endif /* DEBUG */ |
| 909 | |
| 910 | /* Unfortunately this suffers from the same problem as the register |
| 911 | numbering one. We need to know what the width of each logical |
| 912 | register number is for the architecture being simulated. */ |
| 913 | |
| 914 | if (cpu->register_widths[rn] == 0) |
| 915 | { |
| 916 | sim_io_eprintf(sd,"Invalid register width for %d (register store ignored)\n",rn); |
| 917 | return 0; |
| 918 | } |
| 919 | |
| 920 | |
| 921 | |
| 922 | if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR) |
| 923 | { |
| 924 | cpu->fpr_state[rn - FGR_BASE] = fmt_uninterpreted; |
| 925 | if (cpu->register_widths[rn] == 32) |
| 926 | { |
| 927 | if (length == 8) |
| 928 | { |
| 929 | cpu->fgr[rn - FGR_BASE] = |
| 930 | (unsigned32) T2H_8 (*(unsigned64*)memory); |
| 931 | return 8; |
| 932 | } |
| 933 | else |
| 934 | { |
| 935 | cpu->fgr[rn - FGR_BASE] = T2H_4 (*(unsigned32*)memory); |
| 936 | return 4; |
| 937 | } |
| 938 | } |
| 939 | else |
| 940 | { |
| 941 | if (length == 8) |
| 942 | { |
| 943 | cpu->fgr[rn - FGR_BASE] = T2H_8 (*(unsigned64*)memory); |
| 944 | return 8; |
| 945 | } |
| 946 | else |
| 947 | { |
| 948 | cpu->fgr[rn - FGR_BASE] = T2H_4 (*(unsigned32*)memory); |
| 949 | return 4; |
| 950 | } |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | if (cpu->register_widths[rn] == 32) |
| 955 | { |
| 956 | if (length == 8) |
| 957 | { |
| 958 | cpu->registers[rn] = |
| 959 | (unsigned32) T2H_8 (*(unsigned64*)memory); |
| 960 | return 8; |
| 961 | } |
| 962 | else |
| 963 | { |
| 964 | cpu->registers[rn] = T2H_4 (*(unsigned32*)memory); |
| 965 | return 4; |
| 966 | } |
| 967 | } |
| 968 | else |
| 969 | { |
| 970 | if (length == 8) |
| 971 | { |
| 972 | cpu->registers[rn] = T2H_8 (*(unsigned64*)memory); |
| 973 | return 8; |
| 974 | } |
| 975 | else |
| 976 | { |
| 977 | cpu->registers[rn] = (signed32) T2H_4(*(unsigned32*)memory); |
| 978 | return 4; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | return 0; |
| 983 | } |
| 984 | |
| 985 | int |
| 986 | sim_fetch_register (SIM_DESC sd, int rn, unsigned char *memory, int length) |
| 987 | { |
| 988 | sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */ |
| 989 | /* NOTE: gdb (the client) stores registers in target byte order |
| 990 | while the simulator uses host byte order */ |
| 991 | #ifdef DEBUG |
| 992 | #if 0 /* FIXME: doesn't compile */ |
| 993 | sim_io_printf(sd,"sim_fetch_register(%d=0x%s,mem) : place simulator registers into memory\n",rn,pr_addr(registers[rn])); |
| 994 | #endif |
| 995 | #endif /* DEBUG */ |
| 996 | |
| 997 | if (cpu->register_widths[rn] == 0) |
| 998 | { |
| 999 | sim_io_eprintf (sd, "Invalid register width for %d (register fetch ignored)\n",rn); |
| 1000 | return 0; |
| 1001 | } |
| 1002 | |
| 1003 | |
| 1004 | |
| 1005 | /* Any floating point register */ |
| 1006 | if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR) |
| 1007 | { |
| 1008 | if (cpu->register_widths[rn] == 32) |
| 1009 | { |
| 1010 | if (length == 8) |
| 1011 | { |
| 1012 | *(unsigned64*)memory = |
| 1013 | H2T_8 ((unsigned32) (cpu->fgr[rn - FGR_BASE])); |
| 1014 | return 8; |
| 1015 | } |
| 1016 | else |
| 1017 | { |
| 1018 | *(unsigned32*)memory = H2T_4 (cpu->fgr[rn - FGR_BASE]); |
| 1019 | return 4; |
| 1020 | } |
| 1021 | } |
| 1022 | else |
| 1023 | { |
| 1024 | if (length == 8) |
| 1025 | { |
| 1026 | *(unsigned64*)memory = H2T_8 (cpu->fgr[rn - FGR_BASE]); |
| 1027 | return 8; |
| 1028 | } |
| 1029 | else |
| 1030 | { |
| 1031 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->fgr[rn - FGR_BASE])); |
| 1032 | return 4; |
| 1033 | } |
| 1034 | } |
| 1035 | } |
| 1036 | |
| 1037 | if (cpu->register_widths[rn] == 32) |
| 1038 | { |
| 1039 | if (length == 8) |
| 1040 | { |
| 1041 | *(unsigned64*)memory = |
| 1042 | H2T_8 ((unsigned32) (cpu->registers[rn])); |
| 1043 | return 8; |
| 1044 | } |
| 1045 | else |
| 1046 | { |
| 1047 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->registers[rn])); |
| 1048 | return 4; |
| 1049 | } |
| 1050 | } |
| 1051 | else |
| 1052 | { |
| 1053 | if (length == 8) |
| 1054 | { |
| 1055 | *(unsigned64*)memory = |
| 1056 | H2T_8 ((unsigned64) (cpu->registers[rn])); |
| 1057 | return 8; |
| 1058 | } |
| 1059 | else |
| 1060 | { |
| 1061 | *(unsigned32*)memory = H2T_4 ((unsigned32)(cpu->registers[rn])); |
| 1062 | return 4; |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | return 0; |
| 1067 | } |
| 1068 | |
| 1069 | sim_cia |
| 1070 | sim_pc_get (sim_cpu *cpu) |
| 1071 | { |
| 1072 | return PC; |
| 1073 | } |
| 1074 | |
| 1075 | SIM_RC |
| 1076 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env) |
| 1077 | { |
| 1078 | |
| 1079 | #ifdef DEBUG |
| 1080 | #if 0 /* FIXME: doesn't compile */ |
| 1081 | printf("DBG: sim_create_inferior entered: start_address = 0x%s\n", |
| 1082 | pr_addr(PC)); |
| 1083 | #endif |
| 1084 | #endif /* DEBUG */ |
| 1085 | |
| 1086 | ColdReset(sd); |
| 1087 | |
| 1088 | if (abfd != NULL) |
| 1089 | { |
| 1090 | /* override PC value set by ColdReset () */ |
| 1091 | int cpu_nr; |
| 1092 | for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++) |
| 1093 | { |
| 1094 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); |
| 1095 | CIA_SET (cpu, (unsigned64) bfd_get_start_address (abfd)); |
| 1096 | } |
| 1097 | } |
| 1098 | |
| 1099 | #if 0 /* def DEBUG */ |
| 1100 | if (argv || env) |
| 1101 | { |
| 1102 | /* We should really place the argv slot values into the argument |
| 1103 | registers, and onto the stack as required. However, this |
| 1104 | assumes that we have a stack defined, which is not |
| 1105 | necessarily true at the moment. */ |
| 1106 | char **cptr; |
| 1107 | sim_io_printf(sd,"sim_create_inferior() : passed arguments ignored\n"); |
| 1108 | for (cptr = argv; (cptr && *cptr); cptr++) |
| 1109 | printf("DBG: arg \"%s\"\n",*cptr); |
| 1110 | } |
| 1111 | #endif /* DEBUG */ |
| 1112 | |
| 1113 | return SIM_RC_OK; |
| 1114 | } |
| 1115 | |
| 1116 | /*---------------------------------------------------------------------------*/ |
| 1117 | /*-- Private simulator support interface ------------------------------------*/ |
| 1118 | /*---------------------------------------------------------------------------*/ |
| 1119 | |
| 1120 | /* Read a null terminated string from memory, return in a buffer */ |
| 1121 | static char * |
| 1122 | fetch_str (SIM_DESC sd, |
| 1123 | address_word addr) |
| 1124 | { |
| 1125 | char *buf; |
| 1126 | int nr = 0; |
| 1127 | unsigned char null; |
| 1128 | while (sim_read (sd, addr + nr, &null, 1) == 1 && null != 0) |
| 1129 | nr++; |
| 1130 | buf = NZALLOC (char, nr + 1); |
| 1131 | sim_read (sd, addr, (unsigned char *)buf, nr); |
| 1132 | return buf; |
| 1133 | } |
| 1134 | |
| 1135 | |
| 1136 | /* Implements the "sim firmware" command: |
| 1137 | sim firmware NAME[@ADDRESS] --- emulate ROM monitor named NAME. |
| 1138 | NAME can be idt, pmon, or lsipmon. If omitted, ADDRESS |
| 1139 | defaults to the normal address for that monitor. |
| 1140 | sim firmware none --- don't emulate any ROM monitor. Useful |
| 1141 | if you need a clean address space. */ |
| 1142 | static SIM_RC |
| 1143 | sim_firmware_command (SIM_DESC sd, char *arg) |
| 1144 | { |
| 1145 | int address_present = 0; |
| 1146 | SIM_ADDR address; |
| 1147 | |
| 1148 | /* Signal occurrence of this option. */ |
| 1149 | firmware_option_p = 1; |
| 1150 | |
| 1151 | /* Parse out the address, if present. */ |
| 1152 | { |
| 1153 | char *p = strchr (arg, '@'); |
| 1154 | if (p) |
| 1155 | { |
| 1156 | char *q; |
| 1157 | address_present = 1; |
| 1158 | p ++; /* skip over @ */ |
| 1159 | |
| 1160 | address = strtoul (p, &q, 0); |
| 1161 | if (*q != '\0') |
| 1162 | { |
| 1163 | sim_io_printf (sd, "Invalid address given to the" |
| 1164 | "`sim firmware NAME@ADDRESS' command: %s\n", |
| 1165 | p); |
| 1166 | return SIM_RC_FAIL; |
| 1167 | } |
| 1168 | } |
| 1169 | else |
| 1170 | { |
| 1171 | address_present = 0; |
| 1172 | address = -1; /* Dummy value. */ |
| 1173 | } |
| 1174 | } |
| 1175 | |
| 1176 | if (! strncmp (arg, "idt", 3)) |
| 1177 | { |
| 1178 | idt_monitor_base = address_present ? address : 0xBFC00000; |
| 1179 | pmon_monitor_base = 0; |
| 1180 | lsipmon_monitor_base = 0; |
| 1181 | } |
| 1182 | else if (! strncmp (arg, "pmon", 4)) |
| 1183 | { |
| 1184 | /* pmon uses indirect calls. Hook into implied idt. */ |
| 1185 | pmon_monitor_base = address_present ? address : 0xBFC00500; |
| 1186 | idt_monitor_base = pmon_monitor_base - 0x500; |
| 1187 | lsipmon_monitor_base = 0; |
| 1188 | } |
| 1189 | else if (! strncmp (arg, "lsipmon", 7)) |
| 1190 | { |
| 1191 | /* lsipmon uses indirect calls. Hook into implied idt. */ |
| 1192 | pmon_monitor_base = 0; |
| 1193 | lsipmon_monitor_base = address_present ? address : 0xBFC00200; |
| 1194 | idt_monitor_base = lsipmon_monitor_base - 0x200; |
| 1195 | } |
| 1196 | else if (! strncmp (arg, "none", 4)) |
| 1197 | { |
| 1198 | if (address_present) |
| 1199 | { |
| 1200 | sim_io_printf (sd, |
| 1201 | "The `sim firmware none' command does " |
| 1202 | "not take an `ADDRESS' argument.\n"); |
| 1203 | return SIM_RC_FAIL; |
| 1204 | } |
| 1205 | idt_monitor_base = 0; |
| 1206 | pmon_monitor_base = 0; |
| 1207 | lsipmon_monitor_base = 0; |
| 1208 | } |
| 1209 | else |
| 1210 | { |
| 1211 | sim_io_printf (sd, "\ |
| 1212 | Unrecognized name given to the `sim firmware NAME' command: %s\n\ |
| 1213 | Recognized firmware names are: `idt', `pmon', `lsipmon', and `none'.\n", |
| 1214 | arg); |
| 1215 | return SIM_RC_FAIL; |
| 1216 | } |
| 1217 | |
| 1218 | return SIM_RC_OK; |
| 1219 | } |
| 1220 | |
| 1221 | |
| 1222 | |
| 1223 | /* Simple monitor interface (currently setup for the IDT and PMON monitors) */ |
| 1224 | int |
| 1225 | sim_monitor (SIM_DESC sd, |
| 1226 | sim_cpu *cpu, |
| 1227 | address_word cia, |
| 1228 | unsigned int reason) |
| 1229 | { |
| 1230 | #ifdef DEBUG |
| 1231 | printf("DBG: sim_monitor: entered (reason = %d)\n",reason); |
| 1232 | #endif /* DEBUG */ |
| 1233 | |
| 1234 | /* The IDT monitor actually allows two instructions per vector |
| 1235 | slot. However, the simulator currently causes a trap on each |
| 1236 | individual instruction. We cheat, and lose the bottom bit. */ |
| 1237 | reason >>= 1; |
| 1238 | |
| 1239 | /* The following callback functions are available, however the |
| 1240 | monitor we are simulating does not make use of them: get_errno, |
| 1241 | isatty, lseek, rename, system, time and unlink */ |
| 1242 | switch (reason) |
| 1243 | { |
| 1244 | |
| 1245 | case 6: /* int open(char *path,int flags) */ |
| 1246 | { |
| 1247 | char *path = fetch_str (sd, A0); |
| 1248 | V0 = sim_io_open (sd, path, (int)A1); |
| 1249 | free (path); |
| 1250 | break; |
| 1251 | } |
| 1252 | |
| 1253 | case 7: /* int read(int file,char *ptr,int len) */ |
| 1254 | { |
| 1255 | int fd = A0; |
| 1256 | int nr = A2; |
| 1257 | char *buf = zalloc (nr); |
| 1258 | V0 = sim_io_read (sd, fd, buf, nr); |
| 1259 | sim_write (sd, A1, (unsigned char *)buf, nr); |
| 1260 | free (buf); |
| 1261 | } |
| 1262 | break; |
| 1263 | |
| 1264 | case 8: /* int write(int file,char *ptr,int len) */ |
| 1265 | { |
| 1266 | int fd = A0; |
| 1267 | int nr = A2; |
| 1268 | char *buf = zalloc (nr); |
| 1269 | sim_read (sd, A1, (unsigned char *)buf, nr); |
| 1270 | V0 = sim_io_write (sd, fd, buf, nr); |
| 1271 | if (fd == 1) |
| 1272 | sim_io_flush_stdout (sd); |
| 1273 | else if (fd == 2) |
| 1274 | sim_io_flush_stderr (sd); |
| 1275 | free (buf); |
| 1276 | break; |
| 1277 | } |
| 1278 | |
| 1279 | case 10: /* int close(int file) */ |
| 1280 | { |
| 1281 | V0 = sim_io_close (sd, (int)A0); |
| 1282 | break; |
| 1283 | } |
| 1284 | |
| 1285 | case 2: /* Densan monitor: char inbyte(int waitflag) */ |
| 1286 | { |
| 1287 | if (A0 == 0) /* waitflag == NOWAIT */ |
| 1288 | V0 = (unsigned_word)-1; |
| 1289 | } |
| 1290 | /* Drop through to case 11 */ |
| 1291 | |
| 1292 | case 11: /* char inbyte(void) */ |
| 1293 | { |
| 1294 | char tmp; |
| 1295 | /* ensure that all output has gone... */ |
| 1296 | sim_io_flush_stdout (sd); |
| 1297 | if (sim_io_read_stdin (sd, &tmp, sizeof(char)) != sizeof(char)) |
| 1298 | { |
| 1299 | sim_io_error(sd,"Invalid return from character read"); |
| 1300 | V0 = (unsigned_word)-1; |
| 1301 | } |
| 1302 | else |
| 1303 | V0 = (unsigned_word)tmp; |
| 1304 | break; |
| 1305 | } |
| 1306 | |
| 1307 | case 3: /* Densan monitor: void co(char chr) */ |
| 1308 | case 12: /* void outbyte(char chr) : write a byte to "stdout" */ |
| 1309 | { |
| 1310 | char tmp = (char)(A0 & 0xFF); |
| 1311 | sim_io_write_stdout (sd, &tmp, sizeof(char)); |
| 1312 | break; |
| 1313 | } |
| 1314 | |
| 1315 | case 17: /* void _exit() */ |
| 1316 | { |
| 1317 | sim_io_eprintf (sd, "sim_monitor(17): _exit(int reason) to be coded\n"); |
| 1318 | sim_engine_halt (SD, CPU, NULL, NULL_CIA, sim_exited, |
| 1319 | (unsigned int)(A0 & 0xFFFFFFFF)); |
| 1320 | break; |
| 1321 | } |
| 1322 | |
| 1323 | case 28: /* PMON flush_cache */ |
| 1324 | break; |
| 1325 | |
| 1326 | case 55: /* void get_mem_info(unsigned int *ptr) */ |
| 1327 | /* in: A0 = pointer to three word memory location */ |
| 1328 | /* out: [A0 + 0] = size */ |
| 1329 | /* [A0 + 4] = instruction cache size */ |
| 1330 | /* [A0 + 8] = data cache size */ |
| 1331 | { |
| 1332 | unsigned_4 value; |
| 1333 | unsigned_4 zero = 0; |
| 1334 | address_word mem_size; |
| 1335 | sim_memopt *entry, *match = NULL; |
| 1336 | |
| 1337 | /* Search for memory region mapped to KSEG0 or KSEG1. */ |
| 1338 | for (entry = STATE_MEMOPT (sd); |
| 1339 | entry != NULL; |
| 1340 | entry = entry->next) |
| 1341 | { |
| 1342 | if ((entry->addr == K0BASE || entry->addr == K1BASE) |
| 1343 | && (!match || entry->level < match->level)) |
| 1344 | match = entry; |
| 1345 | else |
| 1346 | { |
| 1347 | sim_memopt *alias; |
| 1348 | for (alias = entry->alias; |
| 1349 | alias != NULL; |
| 1350 | alias = alias->next) |
| 1351 | if ((alias->addr == K0BASE || alias->addr == K1BASE) |
| 1352 | && (!match || entry->level < match->level)) |
| 1353 | match = entry; |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | /* Get region size, limit to KSEG1 size (512MB). */ |
| 1358 | SIM_ASSERT (match != NULL); |
| 1359 | mem_size = (match->modulo != 0 |
| 1360 | ? match->modulo : match->nr_bytes); |
| 1361 | if (mem_size > K1SIZE) |
| 1362 | mem_size = K1SIZE; |
| 1363 | |
| 1364 | value = mem_size; |
| 1365 | H2T (value); |
| 1366 | sim_write (sd, A0 + 0, (unsigned char *)&value, 4); |
| 1367 | sim_write (sd, A0 + 4, (unsigned char *)&zero, 4); |
| 1368 | sim_write (sd, A0 + 8, (unsigned char *)&zero, 4); |
| 1369 | /* sim_io_eprintf (sd, "sim: get_mem_info() deprecated\n"); */ |
| 1370 | break; |
| 1371 | } |
| 1372 | |
| 1373 | case 158: /* PMON printf */ |
| 1374 | /* in: A0 = pointer to format string */ |
| 1375 | /* A1 = optional argument 1 */ |
| 1376 | /* A2 = optional argument 2 */ |
| 1377 | /* A3 = optional argument 3 */ |
| 1378 | /* out: void */ |
| 1379 | /* The following is based on the PMON printf source */ |
| 1380 | { |
| 1381 | address_word s = A0; |
| 1382 | unsigned char c; |
| 1383 | signed_word *ap = &A1; /* 1st argument */ |
| 1384 | /* This isn't the quickest way, since we call the host print |
| 1385 | routine for every character almost. But it does avoid |
| 1386 | having to allocate and manage a temporary string buffer. */ |
| 1387 | /* TODO: Include check that we only use three arguments (A1, |
| 1388 | A2 and A3) */ |
| 1389 | while (sim_read (sd, s++, &c, 1) && c != '\0') |
| 1390 | { |
| 1391 | if (c == '%') |
| 1392 | { |
| 1393 | char tmp[40]; |
| 1394 | enum {FMT_RJUST, FMT_LJUST, FMT_RJUST0, FMT_CENTER} fmt = FMT_RJUST; |
| 1395 | int width = 0, trunc = 0, haddot = 0, longlong = 0; |
| 1396 | while (sim_read (sd, s++, &c, 1) && c != '\0') |
| 1397 | { |
| 1398 | if (strchr ("dobxXulscefg%", c)) |
| 1399 | break; |
| 1400 | else if (c == '-') |
| 1401 | fmt = FMT_LJUST; |
| 1402 | else if (c == '0') |
| 1403 | fmt = FMT_RJUST0; |
| 1404 | else if (c == '~') |
| 1405 | fmt = FMT_CENTER; |
| 1406 | else if (c == '*') |
| 1407 | { |
| 1408 | if (haddot) |
| 1409 | trunc = (int)*ap++; |
| 1410 | else |
| 1411 | width = (int)*ap++; |
| 1412 | } |
| 1413 | else if (c >= '1' && c <= '9') |
| 1414 | { |
| 1415 | address_word t = s; |
| 1416 | unsigned int n; |
| 1417 | while (sim_read (sd, s++, &c, 1) == 1 && isdigit (c)) |
| 1418 | tmp[s - t] = c; |
| 1419 | tmp[s - t] = '\0'; |
| 1420 | n = (unsigned int)strtol(tmp,NULL,10); |
| 1421 | if (haddot) |
| 1422 | trunc = n; |
| 1423 | else |
| 1424 | width = n; |
| 1425 | s--; |
| 1426 | } |
| 1427 | else if (c == '.') |
| 1428 | haddot = 1; |
| 1429 | } |
| 1430 | switch (c) |
| 1431 | { |
| 1432 | case '%': |
| 1433 | sim_io_printf (sd, "%%"); |
| 1434 | break; |
| 1435 | case 's': |
| 1436 | if ((int)*ap != 0) |
| 1437 | { |
| 1438 | address_word p = *ap++; |
| 1439 | unsigned char ch; |
| 1440 | while (sim_read (sd, p++, &ch, 1) == 1 && ch != '\0') |
| 1441 | sim_io_printf(sd, "%c", ch); |
| 1442 | } |
| 1443 | else |
| 1444 | sim_io_printf(sd,"(null)"); |
| 1445 | break; |
| 1446 | case 'c': |
| 1447 | sim_io_printf (sd, "%c", (int)*ap++); |
| 1448 | break; |
| 1449 | default: |
| 1450 | if (c == 'l') |
| 1451 | { |
| 1452 | sim_read (sd, s++, &c, 1); |
| 1453 | if (c == 'l') |
| 1454 | { |
| 1455 | longlong = 1; |
| 1456 | sim_read (sd, s++, &c, 1); |
| 1457 | } |
| 1458 | } |
| 1459 | if (strchr ("dobxXu", c)) |
| 1460 | { |
| 1461 | word64 lv = (word64) *ap++; |
| 1462 | if (c == 'b') |
| 1463 | sim_io_printf(sd,"<binary not supported>"); |
| 1464 | else |
| 1465 | { |
| 1466 | sprintf (tmp, "%%%s%c", longlong ? "ll" : "", c); |
| 1467 | if (longlong) |
| 1468 | sim_io_printf(sd, tmp, lv); |
| 1469 | else |
| 1470 | sim_io_printf(sd, tmp, (int)lv); |
| 1471 | } |
| 1472 | } |
| 1473 | else if (strchr ("eEfgG", c)) |
| 1474 | { |
| 1475 | double dbl = *(double*)(ap++); |
| 1476 | sprintf (tmp, "%%%d.%d%c", width, trunc, c); |
| 1477 | sim_io_printf (sd, tmp, dbl); |
| 1478 | trunc = 0; |
| 1479 | } |
| 1480 | } |
| 1481 | } |
| 1482 | else |
| 1483 | sim_io_printf(sd, "%c", c); |
| 1484 | } |
| 1485 | break; |
| 1486 | } |
| 1487 | |
| 1488 | default: |
| 1489 | /* Unknown reason. */ |
| 1490 | return 0; |
| 1491 | } |
| 1492 | return 1; |
| 1493 | } |
| 1494 | |
| 1495 | /* Store a word into memory. */ |
| 1496 | |
| 1497 | static void |
| 1498 | store_word (SIM_DESC sd, |
| 1499 | sim_cpu *cpu, |
| 1500 | address_word cia, |
| 1501 | uword64 vaddr, |
| 1502 | signed_word val) |
| 1503 | { |
| 1504 | address_word paddr; |
| 1505 | int uncached; |
| 1506 | |
| 1507 | if ((vaddr & 3) != 0) |
| 1508 | SignalExceptionAddressStore (); |
| 1509 | else |
| 1510 | { |
| 1511 | if (AddressTranslation (vaddr, isDATA, isSTORE, &paddr, &uncached, |
| 1512 | isTARGET, isREAL)) |
| 1513 | { |
| 1514 | const uword64 mask = 7; |
| 1515 | uword64 memval; |
| 1516 | unsigned int byte; |
| 1517 | |
| 1518 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)); |
| 1519 | byte = (vaddr & mask) ^ (BigEndianCPU << 2); |
| 1520 | memval = ((uword64) val) << (8 * byte); |
| 1521 | StoreMemory (uncached, AccessLength_WORD, memval, 0, paddr, vaddr, |
| 1522 | isREAL); |
| 1523 | } |
| 1524 | } |
| 1525 | } |
| 1526 | |
| 1527 | /* Load a word from memory. */ |
| 1528 | |
| 1529 | static signed_word |
| 1530 | load_word (SIM_DESC sd, |
| 1531 | sim_cpu *cpu, |
| 1532 | address_word cia, |
| 1533 | uword64 vaddr) |
| 1534 | { |
| 1535 | if ((vaddr & 3) != 0) |
| 1536 | { |
| 1537 | SIM_CORE_SIGNAL (SD, cpu, cia, read_map, AccessLength_WORD+1, vaddr, read_transfer, sim_core_unaligned_signal); |
| 1538 | } |
| 1539 | else |
| 1540 | { |
| 1541 | address_word paddr; |
| 1542 | int uncached; |
| 1543 | |
| 1544 | if (AddressTranslation (vaddr, isDATA, isLOAD, &paddr, &uncached, |
| 1545 | isTARGET, isREAL)) |
| 1546 | { |
| 1547 | const uword64 mask = 0x7; |
| 1548 | const unsigned int reverse = ReverseEndian ? 1 : 0; |
| 1549 | const unsigned int bigend = BigEndianCPU ? 1 : 0; |
| 1550 | uword64 memval; |
| 1551 | unsigned int byte; |
| 1552 | |
| 1553 | paddr = (paddr & ~mask) | ((paddr & mask) ^ (reverse << 2)); |
| 1554 | LoadMemory (&memval,NULL,uncached, AccessLength_WORD, paddr, vaddr, |
| 1555 | isDATA, isREAL); |
| 1556 | byte = (vaddr & mask) ^ (bigend << 2); |
| 1557 | return EXTEND32 (memval >> (8 * byte)); |
| 1558 | } |
| 1559 | } |
| 1560 | |
| 1561 | return 0; |
| 1562 | } |
| 1563 | |
| 1564 | /* Simulate the mips16 entry and exit pseudo-instructions. These |
| 1565 | would normally be handled by the reserved instruction exception |
| 1566 | code, but for ease of simulation we just handle them directly. */ |
| 1567 | |
| 1568 | static void |
| 1569 | mips16_entry (SIM_DESC sd, |
| 1570 | sim_cpu *cpu, |
| 1571 | address_word cia, |
| 1572 | unsigned int insn) |
| 1573 | { |
| 1574 | int aregs, sregs, rreg; |
| 1575 | |
| 1576 | #ifdef DEBUG |
| 1577 | printf("DBG: mips16_entry: entered (insn = 0x%08X)\n",insn); |
| 1578 | #endif /* DEBUG */ |
| 1579 | |
| 1580 | aregs = (insn & 0x700) >> 8; |
| 1581 | sregs = (insn & 0x0c0) >> 6; |
| 1582 | rreg = (insn & 0x020) >> 5; |
| 1583 | |
| 1584 | /* This should be checked by the caller. */ |
| 1585 | if (sregs == 3) |
| 1586 | abort (); |
| 1587 | |
| 1588 | if (aregs < 5) |
| 1589 | { |
| 1590 | int i; |
| 1591 | signed_word tsp; |
| 1592 | |
| 1593 | /* This is the entry pseudo-instruction. */ |
| 1594 | |
| 1595 | for (i = 0; i < aregs; i++) |
| 1596 | store_word (SD, CPU, cia, (uword64) (SP + 4 * i), GPR[i + 4]); |
| 1597 | |
| 1598 | tsp = SP; |
| 1599 | SP -= 32; |
| 1600 | |
| 1601 | if (rreg) |
| 1602 | { |
| 1603 | tsp -= 4; |
| 1604 | store_word (SD, CPU, cia, (uword64) tsp, RA); |
| 1605 | } |
| 1606 | |
| 1607 | for (i = 0; i < sregs; i++) |
| 1608 | { |
| 1609 | tsp -= 4; |
| 1610 | store_word (SD, CPU, cia, (uword64) tsp, GPR[16 + i]); |
| 1611 | } |
| 1612 | } |
| 1613 | else |
| 1614 | { |
| 1615 | int i; |
| 1616 | signed_word tsp; |
| 1617 | |
| 1618 | /* This is the exit pseudo-instruction. */ |
| 1619 | |
| 1620 | tsp = SP + 32; |
| 1621 | |
| 1622 | if (rreg) |
| 1623 | { |
| 1624 | tsp -= 4; |
| 1625 | RA = load_word (SD, CPU, cia, (uword64) tsp); |
| 1626 | } |
| 1627 | |
| 1628 | for (i = 0; i < sregs; i++) |
| 1629 | { |
| 1630 | tsp -= 4; |
| 1631 | GPR[i + 16] = load_word (SD, CPU, cia, (uword64) tsp); |
| 1632 | } |
| 1633 | |
| 1634 | SP += 32; |
| 1635 | |
| 1636 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) |
| 1637 | { |
| 1638 | if (aregs == 5) |
| 1639 | { |
| 1640 | FGR[0] = WORD64LO (GPR[4]); |
| 1641 | FPR_STATE[0] = fmt_uninterpreted; |
| 1642 | } |
| 1643 | else if (aregs == 6) |
| 1644 | { |
| 1645 | FGR[0] = WORD64LO (GPR[5]); |
| 1646 | FGR[1] = WORD64LO (GPR[4]); |
| 1647 | FPR_STATE[0] = fmt_uninterpreted; |
| 1648 | FPR_STATE[1] = fmt_uninterpreted; |
| 1649 | } |
| 1650 | } |
| 1651 | |
| 1652 | PC = RA; |
| 1653 | } |
| 1654 | |
| 1655 | } |
| 1656 | |
| 1657 | /*-- trace support ----------------------------------------------------------*/ |
| 1658 | |
| 1659 | /* The TRACE support is provided (if required) in the memory accessing |
| 1660 | routines. Since we are also providing the architecture specific |
| 1661 | features, the architecture simulation code can also deal with |
| 1662 | notifying the TRACE world of cache flushes, etc. Similarly we do |
| 1663 | not need to provide profiling support in the simulator engine, |
| 1664 | since we can sample in the instruction fetch control loop. By |
| 1665 | defining the TRACE manifest, we add tracing as a run-time |
| 1666 | option. */ |
| 1667 | |
| 1668 | #if defined(TRACE) |
| 1669 | /* Tracing by default produces "din" format (as required by |
| 1670 | dineroIII). Each line of such a trace file *MUST* have a din label |
| 1671 | and address field. The rest of the line is ignored, so comments can |
| 1672 | be included if desired. The first field is the label which must be |
| 1673 | one of the following values: |
| 1674 | |
| 1675 | 0 read data |
| 1676 | 1 write data |
| 1677 | 2 instruction fetch |
| 1678 | 3 escape record (treated as unknown access type) |
| 1679 | 4 escape record (causes cache flush) |
| 1680 | |
| 1681 | The address field is a 32bit (lower-case) hexadecimal address |
| 1682 | value. The address should *NOT* be preceded by "0x". |
| 1683 | |
| 1684 | The size of the memory transfer is not important when dealing with |
| 1685 | cache lines (as long as no more than a cache line can be |
| 1686 | transferred in a single operation :-), however more information |
| 1687 | could be given following the dineroIII requirement to allow more |
| 1688 | complete memory and cache simulators to provide better |
| 1689 | results. i.e. the University of Pisa has a cache simulator that can |
| 1690 | also take bus size and speed as (variable) inputs to calculate |
| 1691 | complete system performance (a much more useful ability when trying |
| 1692 | to construct an end product, rather than a processor). They |
| 1693 | currently have an ARM version of their tool called ChARM. */ |
| 1694 | |
| 1695 | |
| 1696 | void |
| 1697 | dotrace (SIM_DESC sd, |
| 1698 | sim_cpu *cpu, |
| 1699 | FILE *tracefh, |
| 1700 | int type, |
| 1701 | SIM_ADDR address, |
| 1702 | int width, |
| 1703 | char *comment,...) |
| 1704 | { |
| 1705 | if (STATE & simTRACE) { |
| 1706 | va_list ap; |
| 1707 | fprintf(tracefh,"%d %s ; width %d ; ", |
| 1708 | type, |
| 1709 | pr_addr(address), |
| 1710 | width); |
| 1711 | va_start(ap,comment); |
| 1712 | vfprintf(tracefh,comment,ap); |
| 1713 | va_end(ap); |
| 1714 | fprintf(tracefh,"\n"); |
| 1715 | } |
| 1716 | /* NOTE: Since the "din" format will only accept 32bit addresses, and |
| 1717 | we may be generating 64bit ones, we should put the hi-32bits of the |
| 1718 | address into the comment field. */ |
| 1719 | |
| 1720 | /* TODO: Provide a buffer for the trace lines. We can then avoid |
| 1721 | performing writes until the buffer is filled, or the file is |
| 1722 | being closed. */ |
| 1723 | |
| 1724 | /* NOTE: We could consider adding a comment field to the "din" file |
| 1725 | produced using type 3 markers (unknown access). This would then |
| 1726 | allow information about the program that the "din" is for, and |
| 1727 | the MIPs world that was being simulated, to be placed into the |
| 1728 | trace file. */ |
| 1729 | |
| 1730 | return; |
| 1731 | } |
| 1732 | #endif /* TRACE */ |
| 1733 | |
| 1734 | /*---------------------------------------------------------------------------*/ |
| 1735 | /*-- simulator engine -------------------------------------------------------*/ |
| 1736 | /*---------------------------------------------------------------------------*/ |
| 1737 | |
| 1738 | static void |
| 1739 | ColdReset (SIM_DESC sd) |
| 1740 | { |
| 1741 | int cpu_nr; |
| 1742 | for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++) |
| 1743 | { |
| 1744 | sim_cpu *cpu = STATE_CPU (sd, cpu_nr); |
| 1745 | /* RESET: Fixed PC address: */ |
| 1746 | PC = (unsigned_word) UNSIGNED64 (0xFFFFFFFFBFC00000); |
| 1747 | /* The reset vector address is in the unmapped, uncached memory space. */ |
| 1748 | |
| 1749 | SR &= ~(status_SR | status_TS | status_RP); |
| 1750 | SR |= (status_ERL | status_BEV); |
| 1751 | |
| 1752 | /* Cheat and allow access to the complete register set immediately */ |
| 1753 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT |
| 1754 | && WITH_TARGET_WORD_BITSIZE == 64) |
| 1755 | SR |= status_FR; /* 64bit registers */ |
| 1756 | |
| 1757 | /* Ensure that any instructions with pending register updates are |
| 1758 | cleared: */ |
| 1759 | PENDING_INVALIDATE(); |
| 1760 | |
| 1761 | /* Initialise the FPU registers to the unknown state */ |
| 1762 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) |
| 1763 | { |
| 1764 | int rn; |
| 1765 | for (rn = 0; (rn < 32); rn++) |
| 1766 | FPR_STATE[rn] = fmt_uninterpreted; |
| 1767 | } |
| 1768 | |
| 1769 | /* Initialise the Config0 register. */ |
| 1770 | C0_CONFIG = 0x80000000 /* Config1 present */ |
| 1771 | | 2; /* KSEG0 uncached */ |
| 1772 | if (WITH_TARGET_WORD_BITSIZE == 64) |
| 1773 | { |
| 1774 | /* FIXME Currently mips/sim-main.c:address_translation() |
| 1775 | truncates all addresses to 32-bits. */ |
| 1776 | if (0 && WITH_TARGET_ADDRESS_BITSIZE == 64) |
| 1777 | C0_CONFIG |= (2 << 13); /* MIPS64, 64-bit addresses */ |
| 1778 | else |
| 1779 | C0_CONFIG |= (1 << 13); /* MIPS64, 32-bit addresses */ |
| 1780 | } |
| 1781 | if (BigEndianMem) |
| 1782 | C0_CONFIG |= 0x00008000; /* Big Endian */ |
| 1783 | } |
| 1784 | } |
| 1785 | |
| 1786 | |
| 1787 | |
| 1788 | |
| 1789 | /* Description from page A-26 of the "MIPS IV Instruction Set" manual (revision 3.1) */ |
| 1790 | /* Signal an exception condition. This will result in an exception |
| 1791 | that aborts the instruction. The instruction operation pseudocode |
| 1792 | will never see a return from this function call. */ |
| 1793 | |
| 1794 | void |
| 1795 | signal_exception (SIM_DESC sd, |
| 1796 | sim_cpu *cpu, |
| 1797 | address_word cia, |
| 1798 | int exception,...) |
| 1799 | { |
| 1800 | /* int vector; */ |
| 1801 | |
| 1802 | #ifdef DEBUG |
| 1803 | sim_io_printf(sd,"DBG: SignalException(%d) PC = 0x%s\n",exception,pr_addr(cia)); |
| 1804 | #endif /* DEBUG */ |
| 1805 | |
| 1806 | /* Ensure that any active atomic read/modify/write operation will fail: */ |
| 1807 | LLBIT = 0; |
| 1808 | |
| 1809 | /* Save registers before interrupt dispatching */ |
| 1810 | #ifdef SIM_CPU_EXCEPTION_TRIGGER |
| 1811 | SIM_CPU_EXCEPTION_TRIGGER(sd, cpu, cia); |
| 1812 | #endif |
| 1813 | |
| 1814 | switch (exception) { |
| 1815 | |
| 1816 | case DebugBreakPoint: |
| 1817 | if (! (Debug & Debug_DM)) |
| 1818 | { |
| 1819 | if (INDELAYSLOT()) |
| 1820 | { |
| 1821 | CANCELDELAYSLOT(); |
| 1822 | |
| 1823 | Debug |= Debug_DBD; /* signaled from within in delay slot */ |
| 1824 | DEPC = cia - 4; /* reference the branch instruction */ |
| 1825 | } |
| 1826 | else |
| 1827 | { |
| 1828 | Debug &= ~Debug_DBD; /* not signaled from within a delay slot */ |
| 1829 | DEPC = cia; |
| 1830 | } |
| 1831 | |
| 1832 | Debug |= Debug_DM; /* in debugging mode */ |
| 1833 | Debug |= Debug_DBp; /* raising a DBp exception */ |
| 1834 | PC = 0xBFC00200; |
| 1835 | sim_engine_restart (SD, CPU, NULL, NULL_CIA); |
| 1836 | } |
| 1837 | break; |
| 1838 | |
| 1839 | case ReservedInstruction: |
| 1840 | { |
| 1841 | va_list ap; |
| 1842 | unsigned int instruction; |
| 1843 | va_start(ap,exception); |
| 1844 | instruction = va_arg(ap,unsigned int); |
| 1845 | va_end(ap); |
| 1846 | /* Provide simple monitor support using ReservedInstruction |
| 1847 | exceptions. The following code simulates the fixed vector |
| 1848 | entry points into the IDT monitor by causing a simulator |
| 1849 | trap, performing the monitor operation, and returning to |
| 1850 | the address held in the $ra register (standard PCS return |
| 1851 | address). This means we only need to pre-load the vector |
| 1852 | space with suitable instruction values. For systems were |
| 1853 | actual trap instructions are used, we would not need to |
| 1854 | perform this magic. */ |
| 1855 | if ((instruction & RSVD_INSTRUCTION_MASK) == RSVD_INSTRUCTION) |
| 1856 | { |
| 1857 | int reason = (instruction >> RSVD_INSTRUCTION_ARG_SHIFT) & RSVD_INSTRUCTION_ARG_MASK; |
| 1858 | if (!sim_monitor (SD, CPU, cia, reason)) |
| 1859 | sim_io_error (sd, "sim_monitor: unhandled reason = %d, pc = 0x%s\n", reason, pr_addr (cia)); |
| 1860 | |
| 1861 | /* NOTE: This assumes that a branch-and-link style |
| 1862 | instruction was used to enter the vector (which is the |
| 1863 | case with the current IDT monitor). */ |
| 1864 | sim_engine_restart (SD, CPU, NULL, RA); |
| 1865 | } |
| 1866 | /* Look for the mips16 entry and exit instructions, and |
| 1867 | simulate a handler for them. */ |
| 1868 | else if ((cia & 1) != 0 |
| 1869 | && (instruction & 0xf81f) == 0xe809 |
| 1870 | && (instruction & 0x0c0) != 0x0c0) |
| 1871 | { |
| 1872 | mips16_entry (SD, CPU, cia, instruction); |
| 1873 | sim_engine_restart (sd, NULL, NULL, NULL_CIA); |
| 1874 | } |
| 1875 | /* else fall through to normal exception processing */ |
| 1876 | sim_io_eprintf(sd,"ReservedInstruction at PC = 0x%s\n", pr_addr (cia)); |
| 1877 | } |
| 1878 | |
| 1879 | default: |
| 1880 | /* Store exception code into current exception id variable (used |
| 1881 | by exit code): */ |
| 1882 | |
| 1883 | /* TODO: If not simulating exceptions then stop the simulator |
| 1884 | execution. At the moment we always stop the simulation. */ |
| 1885 | |
| 1886 | #ifdef SUBTARGET_R3900 |
| 1887 | /* update interrupt-related registers */ |
| 1888 | |
| 1889 | /* insert exception code in bits 6:2 */ |
| 1890 | CAUSE = LSMASKED32(CAUSE, 31, 7) | LSINSERTED32(exception, 6, 2); |
| 1891 | /* shift IE/KU history bits left */ |
| 1892 | SR = LSMASKED32(SR, 31, 4) | LSINSERTED32(LSEXTRACTED32(SR, 3, 0), 5, 2); |
| 1893 | |
| 1894 | if (STATE & simDELAYSLOT) |
| 1895 | { |
| 1896 | STATE &= ~simDELAYSLOT; |
| 1897 | CAUSE |= cause_BD; |
| 1898 | EPC = (cia - 4); /* reference the branch instruction */ |
| 1899 | } |
| 1900 | else |
| 1901 | EPC = cia; |
| 1902 | |
| 1903 | if (SR & status_BEV) |
| 1904 | PC = (signed)0xBFC00000 + 0x180; |
| 1905 | else |
| 1906 | PC = (signed)0x80000000 + 0x080; |
| 1907 | #else |
| 1908 | /* See figure 5-17 for an outline of the code below */ |
| 1909 | if (! (SR & status_EXL)) |
| 1910 | { |
| 1911 | CAUSE = (exception << 2); |
| 1912 | if (STATE & simDELAYSLOT) |
| 1913 | { |
| 1914 | STATE &= ~simDELAYSLOT; |
| 1915 | CAUSE |= cause_BD; |
| 1916 | EPC = (cia - 4); /* reference the branch instruction */ |
| 1917 | } |
| 1918 | else |
| 1919 | EPC = cia; |
| 1920 | /* FIXME: TLB et.al. */ |
| 1921 | /* vector = 0x180; */ |
| 1922 | } |
| 1923 | else |
| 1924 | { |
| 1925 | CAUSE = (exception << 2); |
| 1926 | /* vector = 0x180; */ |
| 1927 | } |
| 1928 | SR |= status_EXL; |
| 1929 | /* Store exception code into current exception id variable (used |
| 1930 | by exit code): */ |
| 1931 | |
| 1932 | if (SR & status_BEV) |
| 1933 | PC = (signed)0xBFC00200 + 0x180; |
| 1934 | else |
| 1935 | PC = (signed)0x80000000 + 0x180; |
| 1936 | #endif |
| 1937 | |
| 1938 | switch ((CAUSE >> 2) & 0x1F) |
| 1939 | { |
| 1940 | case Interrupt: |
| 1941 | /* Interrupts arrive during event processing, no need to |
| 1942 | restart */ |
| 1943 | return; |
| 1944 | |
| 1945 | case NMIReset: |
| 1946 | /* Ditto */ |
| 1947 | #ifdef SUBTARGET_3900 |
| 1948 | /* Exception vector: BEV=0 BFC00000 / BEF=1 BFC00000 */ |
| 1949 | PC = (signed)0xBFC00000; |
| 1950 | #endif /* SUBTARGET_3900 */ |
| 1951 | return; |
| 1952 | |
| 1953 | case TLBModification: |
| 1954 | case TLBLoad: |
| 1955 | case TLBStore: |
| 1956 | case AddressLoad: |
| 1957 | case AddressStore: |
| 1958 | case InstructionFetch: |
| 1959 | case DataReference: |
| 1960 | /* The following is so that the simulator will continue from the |
| 1961 | exception handler address. */ |
| 1962 | sim_engine_halt (SD, CPU, NULL, PC, |
| 1963 | sim_stopped, SIM_SIGBUS); |
| 1964 | |
| 1965 | case ReservedInstruction: |
| 1966 | case CoProcessorUnusable: |
| 1967 | PC = EPC; |
| 1968 | sim_engine_halt (SD, CPU, NULL, PC, |
| 1969 | sim_stopped, SIM_SIGILL); |
| 1970 | |
| 1971 | case IntegerOverflow: |
| 1972 | case FPE: |
| 1973 | sim_engine_halt (SD, CPU, NULL, PC, |
| 1974 | sim_stopped, SIM_SIGFPE); |
| 1975 | |
| 1976 | case BreakPoint: |
| 1977 | sim_engine_halt (SD, CPU, NULL, PC, sim_stopped, SIM_SIGTRAP); |
| 1978 | break; |
| 1979 | |
| 1980 | case SystemCall: |
| 1981 | case Trap: |
| 1982 | sim_engine_restart (SD, CPU, NULL, PC); |
| 1983 | break; |
| 1984 | |
| 1985 | case Watch: |
| 1986 | PC = EPC; |
| 1987 | sim_engine_halt (SD, CPU, NULL, PC, |
| 1988 | sim_stopped, SIM_SIGTRAP); |
| 1989 | |
| 1990 | default: /* Unknown internal exception */ |
| 1991 | PC = EPC; |
| 1992 | sim_engine_halt (SD, CPU, NULL, PC, |
| 1993 | sim_stopped, SIM_SIGABRT); |
| 1994 | |
| 1995 | } |
| 1996 | |
| 1997 | case SimulatorFault: |
| 1998 | { |
| 1999 | va_list ap; |
| 2000 | char *msg; |
| 2001 | va_start(ap,exception); |
| 2002 | msg = va_arg(ap,char *); |
| 2003 | va_end(ap); |
| 2004 | sim_engine_abort (SD, CPU, NULL_CIA, |
| 2005 | "FATAL: Simulator error \"%s\"\n",msg); |
| 2006 | } |
| 2007 | } |
| 2008 | |
| 2009 | return; |
| 2010 | } |
| 2011 | |
| 2012 | |
| 2013 | |
| 2014 | /* This function implements what the MIPS32 and MIPS64 ISAs define as |
| 2015 | "UNPREDICTABLE" behaviour. |
| 2016 | |
| 2017 | About UNPREDICTABLE behaviour they say: "UNPREDICTABLE results |
| 2018 | may vary from processor implementation to processor implementation, |
| 2019 | instruction to instruction, or as a function of time on the same |
| 2020 | implementation or instruction. Software can never depend on results |
| 2021 | that are UNPREDICTABLE. ..." (MIPS64 Architecture for Programmers |
| 2022 | Volume II, The MIPS64 Instruction Set. MIPS Document MD00087 revision |
| 2023 | 0.95, page 2.) |
| 2024 | |
| 2025 | For UNPREDICTABLE behaviour, we print a message, if possible print |
| 2026 | the offending instructions mips.igen instruction name (provided by |
| 2027 | the caller), and stop the simulator. |
| 2028 | |
| 2029 | XXX FIXME: eventually, stopping the simulator should be made conditional |
| 2030 | on a command-line option. */ |
| 2031 | void |
| 2032 | unpredictable_action(sim_cpu *cpu, address_word cia) |
| 2033 | { |
| 2034 | SIM_DESC sd = CPU_STATE(cpu); |
| 2035 | |
| 2036 | sim_io_eprintf(sd, "UNPREDICTABLE: PC = 0x%s\n", pr_addr (cia)); |
| 2037 | sim_engine_halt (SD, CPU, NULL, cia, sim_stopped, SIM_SIGABRT); |
| 2038 | } |
| 2039 | |
| 2040 | |
| 2041 | /*-- co-processor support routines ------------------------------------------*/ |
| 2042 | |
| 2043 | static int UNUSED |
| 2044 | CoProcPresent(unsigned int coproc_number) |
| 2045 | { |
| 2046 | /* Return TRUE if simulator provides a model for the given co-processor number */ |
| 2047 | return(0); |
| 2048 | } |
| 2049 | |
| 2050 | void |
| 2051 | cop_lw (SIM_DESC sd, |
| 2052 | sim_cpu *cpu, |
| 2053 | address_word cia, |
| 2054 | int coproc_num, |
| 2055 | int coproc_reg, |
| 2056 | unsigned int memword) |
| 2057 | { |
| 2058 | switch (coproc_num) |
| 2059 | { |
| 2060 | case 1: |
| 2061 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) |
| 2062 | { |
| 2063 | #ifdef DEBUG |
| 2064 | printf("DBG: COP_LW: memword = 0x%08X (uword64)memword = 0x%s\n",memword,pr_addr(memword)); |
| 2065 | #endif |
| 2066 | StoreFPR(coproc_reg,fmt_uninterpreted_32,(uword64)memword); |
| 2067 | break; |
| 2068 | } |
| 2069 | |
| 2070 | default: |
| 2071 | #if 0 /* this should be controlled by a configuration option */ |
| 2072 | 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)); |
| 2073 | #endif |
| 2074 | break; |
| 2075 | } |
| 2076 | |
| 2077 | return; |
| 2078 | } |
| 2079 | |
| 2080 | void |
| 2081 | cop_ld (SIM_DESC sd, |
| 2082 | sim_cpu *cpu, |
| 2083 | address_word cia, |
| 2084 | int coproc_num, |
| 2085 | int coproc_reg, |
| 2086 | uword64 memword) |
| 2087 | { |
| 2088 | |
| 2089 | #ifdef DEBUG |
| 2090 | 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) ); |
| 2091 | #endif |
| 2092 | |
| 2093 | switch (coproc_num) { |
| 2094 | case 1: |
| 2095 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) |
| 2096 | { |
| 2097 | StoreFPR(coproc_reg,fmt_uninterpreted_64,memword); |
| 2098 | break; |
| 2099 | } |
| 2100 | |
| 2101 | default: |
| 2102 | #if 0 /* this message should be controlled by a configuration option */ |
| 2103 | 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)); |
| 2104 | #endif |
| 2105 | break; |
| 2106 | } |
| 2107 | |
| 2108 | return; |
| 2109 | } |
| 2110 | |
| 2111 | |
| 2112 | |
| 2113 | |
| 2114 | unsigned int |
| 2115 | cop_sw (SIM_DESC sd, |
| 2116 | sim_cpu *cpu, |
| 2117 | address_word cia, |
| 2118 | int coproc_num, |
| 2119 | int coproc_reg) |
| 2120 | { |
| 2121 | unsigned int value = 0; |
| 2122 | |
| 2123 | switch (coproc_num) |
| 2124 | { |
| 2125 | case 1: |
| 2126 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) |
| 2127 | { |
| 2128 | value = (unsigned int)ValueFPR(coproc_reg,fmt_uninterpreted_32); |
| 2129 | break; |
| 2130 | } |
| 2131 | |
| 2132 | default: |
| 2133 | #if 0 /* should be controlled by configuration option */ |
| 2134 | sim_io_printf(sd,"COP_SW(%d,%d) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(cia)); |
| 2135 | #endif |
| 2136 | break; |
| 2137 | } |
| 2138 | |
| 2139 | return(value); |
| 2140 | } |
| 2141 | |
| 2142 | uword64 |
| 2143 | cop_sd (SIM_DESC sd, |
| 2144 | sim_cpu *cpu, |
| 2145 | address_word cia, |
| 2146 | int coproc_num, |
| 2147 | int coproc_reg) |
| 2148 | { |
| 2149 | uword64 value = 0; |
| 2150 | switch (coproc_num) |
| 2151 | { |
| 2152 | case 1: |
| 2153 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) |
| 2154 | { |
| 2155 | value = ValueFPR(coproc_reg,fmt_uninterpreted_64); |
| 2156 | break; |
| 2157 | } |
| 2158 | |
| 2159 | default: |
| 2160 | #if 0 /* should be controlled by configuration option */ |
| 2161 | sim_io_printf(sd,"COP_SD(%d,%d) at PC = 0x%s : TODO (architecture specific)\n",coproc_num,coproc_reg,pr_addr(cia)); |
| 2162 | #endif |
| 2163 | break; |
| 2164 | } |
| 2165 | |
| 2166 | return(value); |
| 2167 | } |
| 2168 | |
| 2169 | |
| 2170 | |
| 2171 | |
| 2172 | void |
| 2173 | decode_coproc (SIM_DESC sd, |
| 2174 | sim_cpu *cpu, |
| 2175 | address_word cia, |
| 2176 | unsigned int instruction) |
| 2177 | { |
| 2178 | int coprocnum = ((instruction >> 26) & 3); |
| 2179 | |
| 2180 | switch (coprocnum) |
| 2181 | { |
| 2182 | case 0: /* standard CPU control and cache registers */ |
| 2183 | { |
| 2184 | int code = ((instruction >> 21) & 0x1F); |
| 2185 | int rt = ((instruction >> 16) & 0x1F); |
| 2186 | int rd = ((instruction >> 11) & 0x1F); |
| 2187 | int tail = instruction & 0x3ff; |
| 2188 | /* R4000 Users Manual (second edition) lists the following CP0 |
| 2189 | instructions: |
| 2190 | CODE><-RT><RD-><--TAIL---> |
| 2191 | DMFC0 Doubleword Move From CP0 (VR4100 = 01000000001tttttddddd00000000000) |
| 2192 | DMTC0 Doubleword Move To CP0 (VR4100 = 01000000101tttttddddd00000000000) |
| 2193 | MFC0 word Move From CP0 (VR4100 = 01000000000tttttddddd00000000000) |
| 2194 | MTC0 word Move To CP0 (VR4100 = 01000000100tttttddddd00000000000) |
| 2195 | TLBR Read Indexed TLB Entry (VR4100 = 01000010000000000000000000000001) |
| 2196 | TLBWI Write Indexed TLB Entry (VR4100 = 01000010000000000000000000000010) |
| 2197 | TLBWR Write Random TLB Entry (VR4100 = 01000010000000000000000000000110) |
| 2198 | TLBP Probe TLB for Matching Entry (VR4100 = 01000010000000000000000000001000) |
| 2199 | CACHE Cache operation (VR4100 = 101111bbbbbpppppiiiiiiiiiiiiiiii) |
| 2200 | ERET Exception return (VR4100 = 01000010000000000000000000011000) |
| 2201 | */ |
| 2202 | if (((code == 0x00) || (code == 0x04) /* MFC0 / MTC0 */ |
| 2203 | || (code == 0x01) || (code == 0x05)) /* DMFC0 / DMTC0 */ |
| 2204 | && tail == 0) |
| 2205 | { |
| 2206 | /* Clear double/single coprocessor move bit. */ |
| 2207 | code &= ~1; |
| 2208 | |
| 2209 | /* M[TF]C0 (32 bits) | DM[TF]C0 (64 bits) */ |
| 2210 | |
| 2211 | switch (rd) /* NOTEs: Standard CP0 registers */ |
| 2212 | { |
| 2213 | /* 0 = Index R4000 VR4100 VR4300 */ |
| 2214 | /* 1 = Random R4000 VR4100 VR4300 */ |
| 2215 | /* 2 = EntryLo0 R4000 VR4100 VR4300 */ |
| 2216 | /* 3 = EntryLo1 R4000 VR4100 VR4300 */ |
| 2217 | /* 4 = Context R4000 VR4100 VR4300 */ |
| 2218 | /* 5 = PageMask R4000 VR4100 VR4300 */ |
| 2219 | /* 6 = Wired R4000 VR4100 VR4300 */ |
| 2220 | /* 8 = BadVAddr R4000 VR4100 VR4300 */ |
| 2221 | /* 9 = Count R4000 VR4100 VR4300 */ |
| 2222 | /* 10 = EntryHi R4000 VR4100 VR4300 */ |
| 2223 | /* 11 = Compare R4000 VR4100 VR4300 */ |
| 2224 | /* 12 = SR R4000 VR4100 VR4300 */ |
| 2225 | #ifdef SUBTARGET_R3900 |
| 2226 | case 3: |
| 2227 | /* 3 = Config R3900 */ |
| 2228 | case 7: |
| 2229 | /* 7 = Cache R3900 */ |
| 2230 | case 15: |
| 2231 | /* 15 = PRID R3900 */ |
| 2232 | |
| 2233 | /* ignore */ |
| 2234 | break; |
| 2235 | |
| 2236 | case 8: |
| 2237 | /* 8 = BadVAddr R4000 VR4100 VR4300 */ |
| 2238 | if (code == 0x00) |
| 2239 | GPR[rt] = (signed_word) (signed_address) COP0_BADVADDR; |
| 2240 | else |
| 2241 | COP0_BADVADDR = GPR[rt]; |
| 2242 | break; |
| 2243 | |
| 2244 | #endif /* SUBTARGET_R3900 */ |
| 2245 | case 12: |
| 2246 | if (code == 0x00) |
| 2247 | GPR[rt] = SR; |
| 2248 | else |
| 2249 | SR = GPR[rt]; |
| 2250 | break; |
| 2251 | /* 13 = Cause R4000 VR4100 VR4300 */ |
| 2252 | case 13: |
| 2253 | if (code == 0x00) |
| 2254 | GPR[rt] = CAUSE; |
| 2255 | else |
| 2256 | CAUSE = GPR[rt]; |
| 2257 | break; |
| 2258 | /* 14 = EPC R4000 VR4100 VR4300 */ |
| 2259 | case 14: |
| 2260 | if (code == 0x00) |
| 2261 | GPR[rt] = (signed_word) (signed_address) EPC; |
| 2262 | else |
| 2263 | EPC = GPR[rt]; |
| 2264 | break; |
| 2265 | /* 15 = PRId R4000 VR4100 VR4300 */ |
| 2266 | #ifdef SUBTARGET_R3900 |
| 2267 | /* 16 = Debug */ |
| 2268 | case 16: |
| 2269 | if (code == 0x00) |
| 2270 | GPR[rt] = Debug; |
| 2271 | else |
| 2272 | Debug = GPR[rt]; |
| 2273 | break; |
| 2274 | #else |
| 2275 | /* 16 = Config R4000 VR4100 VR4300 */ |
| 2276 | case 16: |
| 2277 | if (code == 0x00) |
| 2278 | GPR[rt] = C0_CONFIG; |
| 2279 | else |
| 2280 | /* only bottom three bits are writable */ |
| 2281 | C0_CONFIG = (C0_CONFIG & ~0x7) | (GPR[rt] & 0x7); |
| 2282 | break; |
| 2283 | #endif |
| 2284 | #ifdef SUBTARGET_R3900 |
| 2285 | /* 17 = Debug */ |
| 2286 | case 17: |
| 2287 | if (code == 0x00) |
| 2288 | GPR[rt] = DEPC; |
| 2289 | else |
| 2290 | DEPC = GPR[rt]; |
| 2291 | break; |
| 2292 | #else |
| 2293 | /* 17 = LLAddr R4000 VR4100 VR4300 */ |
| 2294 | #endif |
| 2295 | /* 18 = WatchLo R4000 VR4100 VR4300 */ |
| 2296 | /* 19 = WatchHi R4000 VR4100 VR4300 */ |
| 2297 | /* 20 = XContext R4000 VR4100 VR4300 */ |
| 2298 | /* 26 = PErr or ECC R4000 VR4100 VR4300 */ |
| 2299 | /* 27 = CacheErr R4000 VR4100 */ |
| 2300 | /* 28 = TagLo R4000 VR4100 VR4300 */ |
| 2301 | /* 29 = TagHi R4000 VR4100 VR4300 */ |
| 2302 | /* 30 = ErrorEPC R4000 VR4100 VR4300 */ |
| 2303 | if (STATE_VERBOSE_P(SD)) |
| 2304 | sim_io_eprintf (SD, |
| 2305 | "Warning: PC 0x%lx:interp.c decode_coproc DEADC0DE\n", |
| 2306 | (unsigned long)cia); |
| 2307 | GPR[rt] = 0xDEADC0DE; /* CPR[0,rd] */ |
| 2308 | /* CPR[0,rd] = GPR[rt]; */ |
| 2309 | default: |
| 2310 | if (code == 0x00) |
| 2311 | GPR[rt] = (signed_word) (signed32) COP0_GPR[rd]; |
| 2312 | else |
| 2313 | COP0_GPR[rd] = GPR[rt]; |
| 2314 | #if 0 |
| 2315 | if (code == 0x00) |
| 2316 | sim_io_printf(sd,"Warning: MFC0 %d,%d ignored, PC=%08x (architecture specific)\n",rt,rd, (unsigned)cia); |
| 2317 | else |
| 2318 | sim_io_printf(sd,"Warning: MTC0 %d,%d ignored, PC=%08x (architecture specific)\n",rt,rd, (unsigned)cia); |
| 2319 | #endif |
| 2320 | } |
| 2321 | } |
| 2322 | else if ((code == 0x00 || code == 0x01) |
| 2323 | && rd == 16) |
| 2324 | { |
| 2325 | /* [D]MFC0 RT,C0_CONFIG,SEL */ |
| 2326 | signed32 cfg = 0; |
| 2327 | switch (tail & 0x07) |
| 2328 | { |
| 2329 | case 0: |
| 2330 | cfg = C0_CONFIG; |
| 2331 | break; |
| 2332 | case 1: |
| 2333 | /* MIPS32 r/o Config1: |
| 2334 | Config2 present */ |
| 2335 | cfg = 0x80000000; |
| 2336 | /* MIPS16 implemented. |
| 2337 | XXX How to check configuration? */ |
| 2338 | cfg |= 0x0000004; |
| 2339 | if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT) |
| 2340 | /* MDMX & FPU implemented */ |
| 2341 | cfg |= 0x00000021; |
| 2342 | break; |
| 2343 | case 2: |
| 2344 | /* MIPS32 r/o Config2: |
| 2345 | Config3 present. */ |
| 2346 | cfg = 0x80000000; |
| 2347 | break; |
| 2348 | case 3: |
| 2349 | /* MIPS32 r/o Config3: |
| 2350 | SmartMIPS implemented. */ |
| 2351 | cfg = 0x00000002; |
| 2352 | break; |
| 2353 | } |
| 2354 | GPR[rt] = cfg; |
| 2355 | } |
| 2356 | else if (code == 0x10 && (tail & 0x3f) == 0x18) |
| 2357 | { |
| 2358 | /* ERET */ |
| 2359 | if (SR & status_ERL) |
| 2360 | { |
| 2361 | /* Oops, not yet available */ |
| 2362 | sim_io_printf(sd,"Warning: ERET when SR[ERL] set not handled yet"); |
| 2363 | PC = EPC; |
| 2364 | SR &= ~status_ERL; |
| 2365 | } |
| 2366 | else |
| 2367 | { |
| 2368 | PC = EPC; |
| 2369 | SR &= ~status_EXL; |
| 2370 | } |
| 2371 | } |
| 2372 | else if (code == 0x10 && (tail & 0x3f) == 0x10) |
| 2373 | { |
| 2374 | /* RFE */ |
| 2375 | #ifdef SUBTARGET_R3900 |
| 2376 | /* TX39: Copy IEp/KUp -> IEc/KUc, and IEo/KUo -> IEp/KUp */ |
| 2377 | |
| 2378 | /* shift IE/KU history bits right */ |
| 2379 | SR = LSMASKED32(SR, 31, 4) | LSINSERTED32(LSEXTRACTED32(SR, 5, 2), 3, 0); |
| 2380 | |
| 2381 | /* TODO: CACHE register */ |
| 2382 | #endif /* SUBTARGET_R3900 */ |
| 2383 | } |
| 2384 | else if (code == 0x10 && (tail & 0x3f) == 0x1F) |
| 2385 | { |
| 2386 | /* DERET */ |
| 2387 | Debug &= ~Debug_DM; |
| 2388 | DELAYSLOT(); |
| 2389 | DSPC = DEPC; |
| 2390 | } |
| 2391 | else |
| 2392 | sim_io_eprintf(sd,"Unrecognised COP0 instruction 0x%08X at PC = 0x%s : No handler present\n",instruction,pr_addr(cia)); |
| 2393 | /* TODO: When executing an ERET or RFE instruction we should |
| 2394 | clear LLBIT, to ensure that any out-standing atomic |
| 2395 | read/modify/write sequence fails. */ |
| 2396 | } |
| 2397 | break; |
| 2398 | |
| 2399 | case 2: /* co-processor 2 */ |
| 2400 | { |
| 2401 | int handle = 0; |
| 2402 | |
| 2403 | |
| 2404 | if(! handle) |
| 2405 | { |
| 2406 | sim_io_eprintf(sd, "COP2 instruction 0x%08X at PC = 0x%s : No handler present\n", |
| 2407 | instruction,pr_addr(cia)); |
| 2408 | } |
| 2409 | } |
| 2410 | break; |
| 2411 | |
| 2412 | case 1: /* should not occur (FPU co-processor) */ |
| 2413 | case 3: /* should not occur (FPU co-processor) */ |
| 2414 | SignalException(ReservedInstruction,instruction); |
| 2415 | break; |
| 2416 | } |
| 2417 | |
| 2418 | return; |
| 2419 | } |
| 2420 | |
| 2421 | |
| 2422 | /* This code copied from gdb's utils.c. Would like to share this code, |
| 2423 | but don't know of a common place where both could get to it. */ |
| 2424 | |
| 2425 | /* Temporary storage using circular buffer */ |
| 2426 | #define NUMCELLS 16 |
| 2427 | #define CELLSIZE 32 |
| 2428 | static char* |
| 2429 | get_cell (void) |
| 2430 | { |
| 2431 | static char buf[NUMCELLS][CELLSIZE]; |
| 2432 | static int cell=0; |
| 2433 | if (++cell>=NUMCELLS) cell=0; |
| 2434 | return buf[cell]; |
| 2435 | } |
| 2436 | |
| 2437 | /* Print routines to handle variable size regs, etc */ |
| 2438 | |
| 2439 | /* Eliminate warning from compiler on 32-bit systems */ |
| 2440 | static int thirty_two = 32; |
| 2441 | |
| 2442 | char* |
| 2443 | pr_addr (SIM_ADDR addr) |
| 2444 | { |
| 2445 | char *paddr_str=get_cell(); |
| 2446 | switch (sizeof(addr)) |
| 2447 | { |
| 2448 | case 8: |
| 2449 | sprintf(paddr_str,"%08lx%08lx", |
| 2450 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); |
| 2451 | break; |
| 2452 | case 4: |
| 2453 | sprintf(paddr_str,"%08lx",(unsigned long)addr); |
| 2454 | break; |
| 2455 | case 2: |
| 2456 | sprintf(paddr_str,"%04x",(unsigned short)(addr&0xffff)); |
| 2457 | break; |
| 2458 | default: |
| 2459 | sprintf(paddr_str,"%x",addr); |
| 2460 | } |
| 2461 | return paddr_str; |
| 2462 | } |
| 2463 | |
| 2464 | char* |
| 2465 | pr_uword64 (uword64 addr) |
| 2466 | { |
| 2467 | char *paddr_str=get_cell(); |
| 2468 | sprintf(paddr_str,"%08lx%08lx", |
| 2469 | (unsigned long)(addr>>thirty_two),(unsigned long)(addr&0xffffffff)); |
| 2470 | return paddr_str; |
| 2471 | } |
| 2472 | |
| 2473 | |
| 2474 | void |
| 2475 | mips_core_signal (SIM_DESC sd, |
| 2476 | sim_cpu *cpu, |
| 2477 | sim_cia cia, |
| 2478 | unsigned map, |
| 2479 | int nr_bytes, |
| 2480 | address_word addr, |
| 2481 | transfer_type transfer, |
| 2482 | sim_core_signals sig) |
| 2483 | { |
| 2484 | const char *copy = (transfer == read_transfer ? "read" : "write"); |
| 2485 | address_word ip = CIA_ADDR (cia); |
| 2486 | |
| 2487 | switch (sig) |
| 2488 | { |
| 2489 | case sim_core_unmapped_signal: |
| 2490 | sim_io_eprintf (sd, "mips-core: %d byte %s to unmapped address 0x%lx at 0x%lx\n", |
| 2491 | nr_bytes, copy, |
| 2492 | (unsigned long) addr, (unsigned long) ip); |
| 2493 | COP0_BADVADDR = addr; |
| 2494 | SignalExceptionDataReference(); |
| 2495 | break; |
| 2496 | |
| 2497 | case sim_core_unaligned_signal: |
| 2498 | sim_io_eprintf (sd, "mips-core: %d byte %s to unaligned address 0x%lx at 0x%lx\n", |
| 2499 | nr_bytes, copy, |
| 2500 | (unsigned long) addr, (unsigned long) ip); |
| 2501 | COP0_BADVADDR = addr; |
| 2502 | if(transfer == read_transfer) |
| 2503 | SignalExceptionAddressLoad(); |
| 2504 | else |
| 2505 | SignalExceptionAddressStore(); |
| 2506 | break; |
| 2507 | |
| 2508 | default: |
| 2509 | sim_engine_abort (sd, cpu, cia, |
| 2510 | "mips_core_signal - internal error - bad switch"); |
| 2511 | } |
| 2512 | } |
| 2513 | |
| 2514 | |
| 2515 | void |
| 2516 | mips_cpu_exception_trigger(SIM_DESC sd, sim_cpu* cpu, address_word cia) |
| 2517 | { |
| 2518 | ASSERT(cpu != NULL); |
| 2519 | |
| 2520 | if(cpu->exc_suspended > 0) |
| 2521 | sim_io_eprintf(sd, "Warning, nested exception triggered (%d)\n", cpu->exc_suspended); |
| 2522 | |
| 2523 | PC = cia; |
| 2524 | memcpy(cpu->exc_trigger_registers, cpu->registers, sizeof(cpu->exc_trigger_registers)); |
| 2525 | cpu->exc_suspended = 0; |
| 2526 | } |
| 2527 | |
| 2528 | void |
| 2529 | mips_cpu_exception_suspend(SIM_DESC sd, sim_cpu* cpu, int exception) |
| 2530 | { |
| 2531 | ASSERT(cpu != NULL); |
| 2532 | |
| 2533 | if(cpu->exc_suspended > 0) |
| 2534 | sim_io_eprintf(sd, "Warning, nested exception signal (%d then %d)\n", |
| 2535 | cpu->exc_suspended, exception); |
| 2536 | |
| 2537 | memcpy(cpu->exc_suspend_registers, cpu->registers, sizeof(cpu->exc_suspend_registers)); |
| 2538 | memcpy(cpu->registers, cpu->exc_trigger_registers, sizeof(cpu->registers)); |
| 2539 | cpu->exc_suspended = exception; |
| 2540 | } |
| 2541 | |
| 2542 | void |
| 2543 | mips_cpu_exception_resume(SIM_DESC sd, sim_cpu* cpu, int exception) |
| 2544 | { |
| 2545 | ASSERT(cpu != NULL); |
| 2546 | |
| 2547 | if(exception == 0 && cpu->exc_suspended > 0) |
| 2548 | { |
| 2549 | /* warn not for breakpoints */ |
| 2550 | if(cpu->exc_suspended != sim_signal_to_host(sd, SIM_SIGTRAP)) |
| 2551 | sim_io_eprintf(sd, "Warning, resuming but ignoring pending exception signal (%d)\n", |
| 2552 | cpu->exc_suspended); |
| 2553 | } |
| 2554 | else if(exception != 0 && cpu->exc_suspended > 0) |
| 2555 | { |
| 2556 | if(exception != cpu->exc_suspended) |
| 2557 | sim_io_eprintf(sd, "Warning, resuming with mismatched exception signal (%d vs %d)\n", |
| 2558 | cpu->exc_suspended, exception); |
| 2559 | |
| 2560 | memcpy(cpu->registers, cpu->exc_suspend_registers, sizeof(cpu->registers)); |
| 2561 | } |
| 2562 | else if(exception != 0 && cpu->exc_suspended == 0) |
| 2563 | { |
| 2564 | sim_io_eprintf(sd, "Warning, ignoring spontanous exception signal (%d)\n", exception); |
| 2565 | } |
| 2566 | cpu->exc_suspended = 0; |
| 2567 | } |
| 2568 | |
| 2569 | |
| 2570 | /*---------------------------------------------------------------------------*/ |
| 2571 | /*> EOF interp.c <*/ |