| 1 | /* |
| 2 | * linux specific part of the int10 module |
| 3 | * Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2008 Egbert Eich |
| 4 | */ |
| 5 | #ifdef HAVE_XORG_CONFIG_H |
| 6 | #include <xorg-config.h> |
| 7 | #endif |
| 8 | |
| 9 | #include "xf86.h" |
| 10 | #include "xf86_OSproc.h" |
| 11 | #include "xf86Pci.h" |
| 12 | #include "compiler.h" |
| 13 | #define _INT10_PRIVATE |
| 14 | #include "xf86int10.h" |
| 15 | #ifdef __sparc__ |
| 16 | #define DEV_MEM "/dev/fb" |
| 17 | #else |
| 18 | #define DEV_MEM "/dev/mem" |
| 19 | #endif |
| 20 | #define ALLOC_ENTRIES(x) ((V_RAM / x) - 1) |
| 21 | #define SHMERRORPTR (pointer)(-1) |
| 22 | |
| 23 | #include <fcntl.h> |
| 24 | #include <errno.h> |
| 25 | #include <sys/mman.h> |
| 26 | #include <sys/ipc.h> |
| 27 | #include <sys/shm.h> |
| 28 | #include <unistd.h> |
| 29 | #include <string.h> |
| 30 | |
| 31 | static int counter = 0; |
| 32 | static unsigned long int10Generation = 0; |
| 33 | |
| 34 | static CARD8 read_b(xf86Int10InfoPtr pInt, int addr); |
| 35 | static CARD16 read_w(xf86Int10InfoPtr pInt, int addr); |
| 36 | static CARD32 read_l(xf86Int10InfoPtr pInt, int addr); |
| 37 | static void write_b(xf86Int10InfoPtr pInt, int addr, CARD8 val); |
| 38 | static void write_w(xf86Int10InfoPtr pInt, int addr, CARD16 val); |
| 39 | static void write_l(xf86Int10InfoPtr pInt, int addr, CARD32 val); |
| 40 | |
| 41 | int10MemRec linuxMem = { |
| 42 | read_b, |
| 43 | read_w, |
| 44 | read_l, |
| 45 | write_b, |
| 46 | write_w, |
| 47 | write_l |
| 48 | }; |
| 49 | |
| 50 | typedef struct { |
| 51 | int lowMem; |
| 52 | int highMem; |
| 53 | char *base; |
| 54 | char *base_high; |
| 55 | char *alloc; |
| 56 | } linuxInt10Priv; |
| 57 | |
| 58 | #if defined DoSubModules |
| 59 | |
| 60 | typedef enum { |
| 61 | INT10_NOT_LOADED, |
| 62 | INT10_LOADED_VM86, |
| 63 | INT10_LOADED_X86EMU, |
| 64 | INT10_LOAD_FAILED |
| 65 | } Int10LinuxSubModuleState; |
| 66 | |
| 67 | static Int10LinuxSubModuleState loadedSubModule = INT10_NOT_LOADED; |
| 68 | |
| 69 | static Int10LinuxSubModuleState int10LinuxLoadSubModule(ScrnInfoPtr pScrn); |
| 70 | |
| 71 | #endif /* DoSubModules */ |
| 72 | |
| 73 | xf86Int10InfoPtr |
| 74 | xf86ExtendedInitInt10(int entityIndex, int Flags) |
| 75 | { |
| 76 | xf86Int10InfoPtr pInt = NULL; |
| 77 | int screen; |
| 78 | int fd; |
| 79 | static void *vidMem = NULL; |
| 80 | static void *sysMem = NULL; |
| 81 | void *vMem = NULL; |
| 82 | void *options = NULL; |
| 83 | int low_mem; |
| 84 | int high_mem = -1; |
| 85 | char *base = SHMERRORPTR; |
| 86 | char *base_high = SHMERRORPTR; |
| 87 | int pagesize; |
| 88 | memType cs; |
| 89 | legacyVGARec vga; |
| 90 | Bool videoBiosMapped = FALSE; |
| 91 | ScrnInfoPtr pScrn; |
| 92 | if (int10Generation != serverGeneration) { |
| 93 | counter = 0; |
| 94 | int10Generation = serverGeneration; |
| 95 | } |
| 96 | |
| 97 | pScrn = xf86FindScreenForEntity(entityIndex); |
| 98 | screen = pScrn->scrnIndex; |
| 99 | |
| 100 | options = xf86HandleInt10Options(pScrn, entityIndex); |
| 101 | |
| 102 | if (int10skip(options)) { |
| 103 | free(options); |
| 104 | return NULL; |
| 105 | } |
| 106 | |
| 107 | #if defined DoSubModules |
| 108 | if (loadedSubModule == INT10_NOT_LOADED) |
| 109 | loadedSubModule = int10LinuxLoadSubModule(pScrn); |
| 110 | |
| 111 | if (loadedSubModule == INT10_LOAD_FAILED) |
| 112 | return NULL; |
| 113 | #endif |
| 114 | |
| 115 | if ((!vidMem) || (!sysMem)) { |
| 116 | if ((fd = open(DEV_MEM, O_RDWR, 0)) >= 0) { |
| 117 | if (!sysMem) { |
| 118 | DebugF("Mapping sys bios area\n"); |
| 119 | if ((sysMem = mmap((void *) (SYS_BIOS), BIOS_SIZE, |
| 120 | PROT_READ | PROT_EXEC, |
| 121 | MAP_SHARED | MAP_FIXED, fd, SYS_BIOS)) |
| 122 | == MAP_FAILED) { |
| 123 | xf86DrvMsg(screen, X_ERROR, "Cannot map SYS BIOS\n"); |
| 124 | close(fd); |
| 125 | goto error0; |
| 126 | } |
| 127 | } |
| 128 | if (!vidMem) { |
| 129 | DebugF("Mapping VRAM area\n"); |
| 130 | if ((vidMem = mmap((void *) (V_RAM), VRAM_SIZE, |
| 131 | PROT_READ | PROT_WRITE | PROT_EXEC, |
| 132 | MAP_SHARED | MAP_FIXED, fd, V_RAM)) |
| 133 | == MAP_FAILED) { |
| 134 | xf86DrvMsg(screen, X_ERROR, "Cannot map V_RAM\n"); |
| 135 | close(fd); |
| 136 | goto error0; |
| 137 | } |
| 138 | } |
| 139 | close(fd); |
| 140 | } |
| 141 | else { |
| 142 | xf86DrvMsg(screen, X_ERROR, "Cannot open %s\n", DEV_MEM); |
| 143 | goto error0; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | pInt = (xf86Int10InfoPtr) xnfcalloc(1, sizeof(xf86Int10InfoRec)); |
| 148 | pInt->pScrn = pScrn; |
| 149 | pInt->entityIndex = entityIndex; |
| 150 | pInt->dev = xf86GetPciInfoForEntity(entityIndex); |
| 151 | |
| 152 | if (!xf86Int10ExecSetup(pInt)) |
| 153 | goto error0; |
| 154 | pInt->mem = &linuxMem; |
| 155 | pagesize = getpagesize(); |
| 156 | pInt->private = (pointer) xnfcalloc(1, sizeof(linuxInt10Priv)); |
| 157 | ((linuxInt10Priv *) pInt->private)->alloc = |
| 158 | (pointer) xnfcalloc(1, ALLOC_ENTRIES(pagesize)); |
| 159 | |
| 160 | if (!xf86IsEntityPrimary(entityIndex)) { |
| 161 | DebugF("Mapping high memory area\n"); |
| 162 | if ((high_mem = shmget(counter++, HIGH_MEM_SIZE, |
| 163 | IPC_CREAT | SHM_R | SHM_W)) == -1) { |
| 164 | if (errno == ENOSYS) |
| 165 | xf86DrvMsg(screen, X_ERROR, "shmget error\n Please reconfigure" |
| 166 | " your kernel to include System V IPC support\n"); |
| 167 | else |
| 168 | xf86DrvMsg(screen, X_ERROR, |
| 169 | "shmget(highmem) error: %s\n", strerror(errno)); |
| 170 | goto error1; |
| 171 | } |
| 172 | } |
| 173 | else { |
| 174 | DebugF("Mapping Video BIOS\n"); |
| 175 | videoBiosMapped = TRUE; |
| 176 | if ((fd = open(DEV_MEM, O_RDWR, 0)) >= 0) { |
| 177 | if ((vMem = mmap((void *) (V_BIOS), SYS_BIOS - V_BIOS, |
| 178 | PROT_READ | PROT_WRITE | PROT_EXEC, |
| 179 | MAP_SHARED | MAP_FIXED, fd, V_BIOS)) |
| 180 | == MAP_FAILED) { |
| 181 | xf86DrvMsg(screen, X_ERROR, "Cannot map V_BIOS\n"); |
| 182 | close(fd); |
| 183 | goto error1; |
| 184 | } |
| 185 | close(fd); |
| 186 | } |
| 187 | else |
| 188 | goto error1; |
| 189 | } |
| 190 | ((linuxInt10Priv *) pInt->private)->highMem = high_mem; |
| 191 | |
| 192 | DebugF("Mapping 640kB area\n"); |
| 193 | if ((low_mem = shmget(counter++, V_RAM, IPC_CREAT | SHM_R | SHM_W)) == -1) { |
| 194 | xf86DrvMsg(screen, X_ERROR, |
| 195 | "shmget(lowmem) error: %s\n", strerror(errno)); |
| 196 | goto error2; |
| 197 | } |
| 198 | |
| 199 | ((linuxInt10Priv *) pInt->private)->lowMem = low_mem; |
| 200 | base = shmat(low_mem, 0, 0); |
| 201 | if (base == SHMERRORPTR) { |
| 202 | xf86DrvMsg(screen, X_ERROR, |
| 203 | "shmat(low_mem) error: %s\n", strerror(errno)); |
| 204 | goto error3; |
| 205 | } |
| 206 | ((linuxInt10Priv *) pInt->private)->base = base; |
| 207 | if (high_mem > -1) { |
| 208 | base_high = shmat(high_mem, 0, 0); |
| 209 | if (base_high == SHMERRORPTR) { |
| 210 | xf86DrvMsg(screen, X_ERROR, |
| 211 | "shmat(high_mem) error: %s\n", strerror(errno)); |
| 212 | goto error3; |
| 213 | } |
| 214 | ((linuxInt10Priv *) pInt->private)->base_high = base_high; |
| 215 | } |
| 216 | else |
| 217 | ((linuxInt10Priv *) pInt->private)->base_high = NULL; |
| 218 | |
| 219 | if (!MapCurrentInt10(pInt)) |
| 220 | goto error3; |
| 221 | |
| 222 | Int10Current = pInt; |
| 223 | |
| 224 | DebugF("Mapping int area\n"); |
| 225 | if (xf86ReadBIOS(0, 0, (unsigned char *) 0, LOW_PAGE_SIZE) < 0) { |
| 226 | xf86DrvMsg(screen, X_ERROR, "Cannot read int vect\n"); |
| 227 | goto error3; |
| 228 | } |
| 229 | DebugF("done\n"); |
| 230 | /* |
| 231 | * Read in everything between V_BIOS and SYS_BIOS as some system BIOSes |
| 232 | * have executable code there. Note that xf86ReadBIOS() can only bring in |
| 233 | * 64K bytes at a time. |
| 234 | */ |
| 235 | if (!videoBiosMapped) { |
| 236 | memset((pointer) V_BIOS, 0, SYS_BIOS - V_BIOS); |
| 237 | DebugF("Reading BIOS\n"); |
| 238 | for (cs = V_BIOS; cs < SYS_BIOS; cs += V_BIOS_SIZE) |
| 239 | if (xf86ReadBIOS(cs, 0, (pointer) cs, V_BIOS_SIZE) < V_BIOS_SIZE) |
| 240 | xf86DrvMsg(screen, X_WARNING, |
| 241 | "Unable to retrieve all of segment 0x%06lX.\n", |
| 242 | (long) cs); |
| 243 | DebugF("done\n"); |
| 244 | } |
| 245 | |
| 246 | if (xf86IsEntityPrimary(entityIndex) && !(initPrimary(options))) { |
| 247 | if (!xf86int10GetBiosSegment(pInt, NULL)) |
| 248 | goto error3; |
| 249 | |
| 250 | set_return_trap(pInt); |
| 251 | #ifdef _PC |
| 252 | pInt->Flags = Flags & (SET_BIOS_SCRATCH | RESTORE_BIOS_SCRATCH); |
| 253 | if (!(pInt->Flags & SET_BIOS_SCRATCH)) |
| 254 | pInt->Flags &= ~RESTORE_BIOS_SCRATCH; |
| 255 | xf86Int10SaveRestoreBIOSVars(pInt, TRUE); |
| 256 | #endif |
| 257 | } |
| 258 | else { |
| 259 | const BusType location_type = xf86int10GetBiosLocationType(pInt); |
| 260 | |
| 261 | switch (location_type) { |
| 262 | case BUS_PCI:{ |
| 263 | int err; |
| 264 | struct pci_device *rom_device = |
| 265 | xf86GetPciInfoForEntity(pInt->entityIndex); |
| 266 | |
| 267 | pci_device_enable(rom_device); |
| 268 | err = pci_device_read_rom(rom_device, (unsigned char *) (V_BIOS)); |
| 269 | if (err) { |
| 270 | xf86DrvMsg(screen, X_ERROR, "Cannot read V_BIOS (%s)\n", |
| 271 | strerror(err)); |
| 272 | goto error3; |
| 273 | } |
| 274 | |
| 275 | pInt->BIOSseg = V_BIOS >> 4; |
| 276 | break; |
| 277 | } |
| 278 | default: |
| 279 | goto error3; |
| 280 | } |
| 281 | |
| 282 | pInt->num = 0xe6; |
| 283 | reset_int_vect(pInt); |
| 284 | set_return_trap(pInt); |
| 285 | LockLegacyVGA(pInt, &vga); |
| 286 | xf86ExecX86int10(pInt); |
| 287 | UnlockLegacyVGA(pInt, &vga); |
| 288 | } |
| 289 | #ifdef DEBUG |
| 290 | dprint(0xc0000, 0x20); |
| 291 | #endif |
| 292 | |
| 293 | free(options); |
| 294 | return pInt; |
| 295 | |
| 296 | error3: |
| 297 | if (base_high) |
| 298 | shmdt(base_high); |
| 299 | shmdt(base); |
| 300 | shmdt(0); |
| 301 | if (base_high) |
| 302 | shmdt((char *) HIGH_MEM); |
| 303 | shmctl(low_mem, IPC_RMID, NULL); |
| 304 | Int10Current = NULL; |
| 305 | error2: |
| 306 | if (high_mem > -1) |
| 307 | shmctl(high_mem, IPC_RMID, NULL); |
| 308 | error1: |
| 309 | if (vMem) |
| 310 | munmap(vMem, SYS_BIOS - V_BIOS); |
| 311 | free(((linuxInt10Priv *) pInt->private)->alloc); |
| 312 | free(pInt->private); |
| 313 | error0: |
| 314 | free(options); |
| 315 | free(pInt); |
| 316 | return NULL; |
| 317 | } |
| 318 | |
| 319 | Bool |
| 320 | MapCurrentInt10(xf86Int10InfoPtr pInt) |
| 321 | { |
| 322 | pointer addr; |
| 323 | int fd = -1; |
| 324 | |
| 325 | if (Int10Current) { |
| 326 | shmdt(0); |
| 327 | if (((linuxInt10Priv *) Int10Current->private)->highMem >= 0) |
| 328 | shmdt((char *) HIGH_MEM); |
| 329 | else |
| 330 | munmap((pointer) V_BIOS, (SYS_BIOS - V_BIOS)); |
| 331 | } |
| 332 | addr = |
| 333 | shmat(((linuxInt10Priv *) pInt->private)->lowMem, (char *) 1, SHM_RND); |
| 334 | if (addr == SHMERRORPTR) { |
| 335 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, "Cannot shmat() low memory\n"); |
| 336 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, |
| 337 | "shmat(low_mem) error: %s\n", strerror(errno)); |
| 338 | return FALSE; |
| 339 | } |
| 340 | if (mprotect((void *) 0, V_RAM, PROT_READ | PROT_WRITE | PROT_EXEC) != 0) |
| 341 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, |
| 342 | "Cannot set EXEC bit on low memory: %s\n", strerror(errno)); |
| 343 | |
| 344 | if (((linuxInt10Priv *) pInt->private)->highMem >= 0) { |
| 345 | addr = shmat(((linuxInt10Priv *) pInt->private)->highMem, |
| 346 | (char *) HIGH_MEM, 0); |
| 347 | if (addr == SHMERRORPTR) { |
| 348 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, |
| 349 | "Cannot shmat() high memory\n"); |
| 350 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, |
| 351 | "shmget error: %s\n", strerror(errno)); |
| 352 | return FALSE; |
| 353 | } |
| 354 | if (mprotect((void *) HIGH_MEM, HIGH_MEM_SIZE, |
| 355 | PROT_READ | PROT_WRITE | PROT_EXEC) != 0) |
| 356 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, |
| 357 | "Cannot set EXEC bit on high memory: %s\n", |
| 358 | strerror(errno)); |
| 359 | } |
| 360 | else { |
| 361 | if ((fd = open(DEV_MEM, O_RDWR, 0)) >= 0) { |
| 362 | if (mmap((void *) (V_BIOS), SYS_BIOS - V_BIOS, |
| 363 | PROT_READ | PROT_WRITE | PROT_EXEC, |
| 364 | MAP_SHARED | MAP_FIXED, fd, V_BIOS) |
| 365 | == MAP_FAILED) { |
| 366 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, "Cannot map V_BIOS\n"); |
| 367 | close(fd); |
| 368 | return FALSE; |
| 369 | } |
| 370 | } |
| 371 | else { |
| 372 | xf86DrvMsg(pInt->pScrn->scrnIndex, X_ERROR, "Cannot open %s\n", DEV_MEM); |
| 373 | return FALSE; |
| 374 | } |
| 375 | close(fd); |
| 376 | } |
| 377 | |
| 378 | return TRUE; |
| 379 | } |
| 380 | |
| 381 | void |
| 382 | xf86FreeInt10(xf86Int10InfoPtr pInt) |
| 383 | { |
| 384 | if (!pInt) |
| 385 | return; |
| 386 | |
| 387 | #ifdef _PC |
| 388 | xf86Int10SaveRestoreBIOSVars(pInt, FALSE); |
| 389 | #endif |
| 390 | if (Int10Current == pInt) { |
| 391 | shmdt(0); |
| 392 | if (((linuxInt10Priv *) pInt->private)->highMem >= 0) |
| 393 | shmdt((char *) HIGH_MEM); |
| 394 | else |
| 395 | munmap((pointer) V_BIOS, (SYS_BIOS - V_BIOS)); |
| 396 | Int10Current = NULL; |
| 397 | } |
| 398 | |
| 399 | if (((linuxInt10Priv *) pInt->private)->base_high) |
| 400 | shmdt(((linuxInt10Priv *) pInt->private)->base_high); |
| 401 | shmdt(((linuxInt10Priv *) pInt->private)->base); |
| 402 | shmctl(((linuxInt10Priv *) pInt->private)->lowMem, IPC_RMID, NULL); |
| 403 | if (((linuxInt10Priv *) pInt->private)->highMem >= 0) |
| 404 | shmctl(((linuxInt10Priv *) pInt->private)->highMem, IPC_RMID, NULL); |
| 405 | free(((linuxInt10Priv *) pInt->private)->alloc); |
| 406 | free(pInt->private); |
| 407 | free(pInt); |
| 408 | } |
| 409 | |
| 410 | void * |
| 411 | xf86Int10AllocPages(xf86Int10InfoPtr pInt, int num, int *off) |
| 412 | { |
| 413 | int pagesize = getpagesize(); |
| 414 | int num_pages = ALLOC_ENTRIES(pagesize); |
| 415 | int i, j; |
| 416 | |
| 417 | for (i = 0; i < (num_pages - num); i++) { |
| 418 | if (((linuxInt10Priv *) pInt->private)->alloc[i] == 0) { |
| 419 | for (j = i; j < (num + i); j++) |
| 420 | if ((((linuxInt10Priv *) pInt->private)->alloc[j] != 0)) |
| 421 | break; |
| 422 | if (j == (num + i)) |
| 423 | break; |
| 424 | else |
| 425 | i = i + num; |
| 426 | } |
| 427 | } |
| 428 | if (i == (num_pages - num)) |
| 429 | return NULL; |
| 430 | |
| 431 | for (j = i; j < (i + num); j++) |
| 432 | ((linuxInt10Priv *) pInt->private)->alloc[j] = 1; |
| 433 | |
| 434 | *off = (i + 1) * pagesize; |
| 435 | |
| 436 | return ((linuxInt10Priv *) pInt->private)->base + ((i + 1) * pagesize); |
| 437 | } |
| 438 | |
| 439 | void |
| 440 | xf86Int10FreePages(xf86Int10InfoPtr pInt, void *pbase, int num) |
| 441 | { |
| 442 | int pagesize = getpagesize(); |
| 443 | int first = (((unsigned long) pbase |
| 444 | - (unsigned long) ((linuxInt10Priv *) pInt->private)->base) |
| 445 | / pagesize) - 1; |
| 446 | int i; |
| 447 | |
| 448 | for (i = first; i < (first + num); i++) |
| 449 | ((linuxInt10Priv *) pInt->private)->alloc[i] = 0; |
| 450 | } |
| 451 | |
| 452 | static CARD8 |
| 453 | read_b(xf86Int10InfoPtr pInt, int addr) |
| 454 | { |
| 455 | return *((CARD8 *) (memType) addr); |
| 456 | } |
| 457 | |
| 458 | static CARD16 |
| 459 | read_w(xf86Int10InfoPtr pInt, int addr) |
| 460 | { |
| 461 | return *((CARD16 *) (memType) addr); |
| 462 | } |
| 463 | |
| 464 | static CARD32 |
| 465 | read_l(xf86Int10InfoPtr pInt, int addr) |
| 466 | { |
| 467 | return *((CARD32 *) (memType) addr); |
| 468 | } |
| 469 | |
| 470 | static void |
| 471 | write_b(xf86Int10InfoPtr pInt, int addr, CARD8 val) |
| 472 | { |
| 473 | *((CARD8 *) (memType) addr) = val; |
| 474 | } |
| 475 | |
| 476 | static void |
| 477 | write_w(xf86Int10InfoPtr pInt, int addr, CARD16 val) |
| 478 | { |
| 479 | *((CARD16 *) (memType) addr) = val; |
| 480 | } |
| 481 | |
| 482 | static |
| 483 | void |
| 484 | write_l(xf86Int10InfoPtr pInt, int addr, CARD32 val) |
| 485 | { |
| 486 | *((CARD32 *) (memType) addr) = val; |
| 487 | } |
| 488 | |
| 489 | pointer |
| 490 | xf86int10Addr(xf86Int10InfoPtr pInt, CARD32 addr) |
| 491 | { |
| 492 | if (addr < V_RAM) |
| 493 | return ((linuxInt10Priv *) pInt->private)->base + addr; |
| 494 | else if (addr < V_BIOS) |
| 495 | return (pointer) (memType) addr; |
| 496 | else if (addr < SYS_BIOS) { |
| 497 | if (((linuxInt10Priv *) pInt->private)->base_high) |
| 498 | return (pointer) (((linuxInt10Priv *) pInt->private)->base_high |
| 499 | - V_BIOS + addr); |
| 500 | else |
| 501 | return (pointer) (memType) addr; |
| 502 | } |
| 503 | else |
| 504 | return (pointer) (memType) addr; |
| 505 | } |
| 506 | |
| 507 | #if defined DoSubModules |
| 508 | |
| 509 | static Bool |
| 510 | vm86_tst(void) |
| 511 | { |
| 512 | int __res; |
| 513 | |
| 514 | #ifdef __PIC__ |
| 515 | /* When compiling with -fPIC, we can't use asm constraint "b" because |
| 516 | %ebx is already taken by gcc. */ |
| 517 | __asm__ __volatile__("pushl %%ebx\n\t" |
| 518 | "movl %2,%%ebx\n\t" |
| 519 | "movl %1,%%eax\n\t" |
| 520 | "int $0x80\n\t" "popl %%ebx":"=a"(__res) |
| 521 | :"n"((int) 113), "r"(NULL)); |
| 522 | #else |
| 523 | __asm__ __volatile__("int $0x80\n\t":"=a"(__res):"a"((int) 113), |
| 524 | "b"((struct vm86_struct *) NULL)); |
| 525 | #endif |
| 526 | |
| 527 | if (__res < 0 && __res == -ENOSYS) |
| 528 | return FALSE; |
| 529 | |
| 530 | return TRUE; |
| 531 | } |
| 532 | |
| 533 | static Int10LinuxSubModuleState |
| 534 | int10LinuxLoadSubModule(ScrnInfoPtr pScrn) |
| 535 | { |
| 536 | if (vm86_tst()) { |
| 537 | if (xf86LoadSubModule(pScrn, "vm86")) |
| 538 | return INT10_LOADED_VM86; |
| 539 | } |
| 540 | if (xf86LoadSubModule(pScrn, "x86emu")) |
| 541 | return INT10_LOADED_X86EMU; |
| 542 | |
| 543 | return INT10_LOAD_FAILED; |
| 544 | } |
| 545 | |
| 546 | #endif /* DoSubModules */ |