Jean-Baptiste Queru | 46e568c | 2009-10-27 09:08:42 -0700 | [diff] [blame] | 1 | /* $XFree86: xc/lib/Xxf86dga/XF86DGA.c,v 3.19 2001/08/18 02:41:30 dawes Exp $ */ |
| 2 | /* |
| 3 | |
| 4 | Copyright (c) 1995 Jon Tombs |
| 5 | Copyright (c) 1995,1996 The XFree86 Project, Inc |
| 6 | |
| 7 | */ |
| 8 | |
| 9 | /* THIS IS NOT AN X CONSORTIUM STANDARD */ |
| 10 | |
| 11 | #ifdef __EMX__ /* needed here to override certain constants in X headers */ |
| 12 | #define INCL_DOS |
| 13 | #define INCL_DOSIOCTL |
| 14 | #include <os2.h> |
| 15 | #endif |
| 16 | |
| 17 | #if defined(linux) |
| 18 | #define HAS_MMAP_ANON |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/mman.h> |
| 21 | /*#include <asm/page.h>*/ /* PAGE_SIZE */ |
| 22 | #define HAS_SC_PAGESIZE /* _SC_PAGESIZE may be an enum for Linux */ |
| 23 | #define HAS_GETPAGESIZE |
| 24 | #endif /* linux */ |
| 25 | |
| 26 | #if defined(CSRG_BASED) |
| 27 | #define HAS_MMAP_ANON |
| 28 | #define HAS_GETPAGESIZE |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/mman.h> |
| 31 | #endif /* CSRG_BASED */ |
| 32 | |
| 33 | #if defined(DGUX) |
| 34 | #define HAS_GETPAGESIZE |
| 35 | #define MMAP_DEV_ZERO |
| 36 | #include <sys/types.h> |
| 37 | #include <sys/mman.h> |
| 38 | #include <unistd.h> |
| 39 | #endif /* DGUX */ |
| 40 | |
| 41 | #if defined(SVR4) && !defined(DGUX) |
| 42 | #define MMAP_DEV_ZERO |
| 43 | #include <sys/types.h> |
| 44 | #include <sys/mman.h> |
| 45 | #include <unistd.h> |
| 46 | #endif /* SVR4 && !DGUX */ |
| 47 | |
| 48 | #if defined(sun) && !defined(SVR4) /* SunOS */ |
| 49 | #define MMAP_DEV_ZERO /* doesn't SunOS have MAP_ANON ?? */ |
| 50 | #define HAS_GETPAGESIZE |
| 51 | #include <sys/types.h> |
| 52 | #include <sys/mman.h> |
| 53 | #endif /* sun && !SVR4 */ |
| 54 | |
| 55 | #ifdef XNO_SYSCONF |
| 56 | #undef _SC_PAGESIZE |
| 57 | #endif |
| 58 | |
| 59 | #define NEED_EVENTS |
| 60 | #define NEED_REPLIES |
| 61 | |
| 62 | #include <X11/Xlibint.h> |
| 63 | #include "../extensions/xf86dga.h" |
| 64 | #include "../extensions/xf86dgastr.h" |
| 65 | #include "../extensions/Xext.h" |
| 66 | #include "../extensions/extutil.h" |
| 67 | |
| 68 | extern XExtDisplayInfo* SDL_NAME(xdga_find_display)(Display*); |
| 69 | extern char *SDL_NAME(xdga_extension_name); |
| 70 | |
| 71 | #define XF86DGACheckExtension(dpy,i,val) \ |
| 72 | XextCheckExtension (dpy, i, SDL_NAME(xdga_extension_name), val) |
| 73 | |
| 74 | /***************************************************************************** |
| 75 | * * |
| 76 | * public XFree86-DGA Extension routines * |
| 77 | * * |
| 78 | *****************************************************************************/ |
| 79 | |
| 80 | Bool SDL_NAME(XF86DGAQueryExtension) ( |
| 81 | Display *dpy, |
| 82 | int *event_basep, |
| 83 | int *error_basep |
| 84 | ){ |
| 85 | return SDL_NAME(XDGAQueryExtension)(dpy, event_basep, error_basep); |
| 86 | } |
| 87 | |
| 88 | Bool SDL_NAME(XF86DGAQueryVersion)( |
| 89 | Display* dpy, |
| 90 | int* majorVersion, |
| 91 | int* minorVersion |
| 92 | ){ |
| 93 | return SDL_NAME(XDGAQueryVersion)(dpy, majorVersion, minorVersion); |
| 94 | } |
| 95 | |
| 96 | Bool SDL_NAME(XF86DGAGetVideoLL)( |
| 97 | Display* dpy, |
| 98 | int screen, |
| 99 | int *offset, |
| 100 | int *width, |
| 101 | int *bank_size, |
| 102 | int *ram_size |
| 103 | ){ |
| 104 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 105 | xXF86DGAGetVideoLLReply rep; |
| 106 | xXF86DGAGetVideoLLReq *req; |
| 107 | |
| 108 | XF86DGACheckExtension (dpy, info, False); |
| 109 | |
| 110 | LockDisplay(dpy); |
| 111 | GetReq(XF86DGAGetVideoLL, req); |
| 112 | req->reqType = info->codes->major_opcode; |
| 113 | req->dgaReqType = X_XF86DGAGetVideoLL; |
| 114 | req->screen = screen; |
| 115 | if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { |
| 116 | UnlockDisplay(dpy); |
| 117 | SyncHandle(); |
| 118 | return False; |
| 119 | } |
| 120 | |
| 121 | *offset = /*(char *)*/rep.offset; |
| 122 | *width = rep.width; |
| 123 | *bank_size = rep.bank_size; |
| 124 | *ram_size = rep.ram_size; |
| 125 | |
| 126 | UnlockDisplay(dpy); |
| 127 | SyncHandle(); |
| 128 | return True; |
| 129 | } |
| 130 | |
| 131 | |
| 132 | Bool SDL_NAME(XF86DGADirectVideoLL)( |
| 133 | Display* dpy, |
| 134 | int screen, |
| 135 | int enable |
| 136 | ){ |
| 137 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 138 | xXF86DGADirectVideoReq *req; |
| 139 | |
| 140 | XF86DGACheckExtension (dpy, info, False); |
| 141 | |
| 142 | LockDisplay(dpy); |
| 143 | GetReq(XF86DGADirectVideo, req); |
| 144 | req->reqType = info->codes->major_opcode; |
| 145 | req->dgaReqType = X_XF86DGADirectVideo; |
| 146 | req->screen = screen; |
| 147 | req->enable = enable; |
| 148 | UnlockDisplay(dpy); |
| 149 | SyncHandle(); |
| 150 | XSync(dpy,False); |
| 151 | return True; |
| 152 | } |
| 153 | |
| 154 | Bool SDL_NAME(XF86DGAGetViewPortSize)( |
| 155 | Display* dpy, |
| 156 | int screen, |
| 157 | int *width, |
| 158 | int *height |
| 159 | ){ |
| 160 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 161 | xXF86DGAGetViewPortSizeReply rep; |
| 162 | xXF86DGAGetViewPortSizeReq *req; |
| 163 | |
| 164 | XF86DGACheckExtension (dpy, info, False); |
| 165 | |
| 166 | LockDisplay(dpy); |
| 167 | GetReq(XF86DGAGetViewPortSize, req); |
| 168 | req->reqType = info->codes->major_opcode; |
| 169 | req->dgaReqType = X_XF86DGAGetViewPortSize; |
| 170 | req->screen = screen; |
| 171 | if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { |
| 172 | UnlockDisplay(dpy); |
| 173 | SyncHandle(); |
| 174 | return False; |
| 175 | } |
| 176 | |
| 177 | *width = rep.width; |
| 178 | *height = rep.height; |
| 179 | |
| 180 | UnlockDisplay(dpy); |
| 181 | SyncHandle(); |
| 182 | return True; |
| 183 | } |
| 184 | |
| 185 | |
| 186 | Bool SDL_NAME(XF86DGASetViewPort)( |
| 187 | Display* dpy, |
| 188 | int screen, |
| 189 | int x, |
| 190 | int y |
| 191 | ){ |
| 192 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 193 | xXF86DGASetViewPortReq *req; |
| 194 | |
| 195 | XF86DGACheckExtension (dpy, info, False); |
| 196 | |
| 197 | LockDisplay(dpy); |
| 198 | GetReq(XF86DGASetViewPort, req); |
| 199 | req->reqType = info->codes->major_opcode; |
| 200 | req->dgaReqType = X_XF86DGASetViewPort; |
| 201 | req->screen = screen; |
| 202 | req->x = x; |
| 203 | req->y = y; |
| 204 | UnlockDisplay(dpy); |
| 205 | SyncHandle(); |
| 206 | XSync(dpy,False); |
| 207 | return True; |
| 208 | } |
| 209 | |
| 210 | |
| 211 | Bool SDL_NAME(XF86DGAGetVidPage)( |
| 212 | Display* dpy, |
| 213 | int screen, |
| 214 | int *vpage |
| 215 | ){ |
| 216 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 217 | xXF86DGAGetVidPageReply rep; |
| 218 | xXF86DGAGetVidPageReq *req; |
| 219 | |
| 220 | XF86DGACheckExtension (dpy, info, False); |
| 221 | |
| 222 | LockDisplay(dpy); |
| 223 | GetReq(XF86DGAGetVidPage, req); |
| 224 | req->reqType = info->codes->major_opcode; |
| 225 | req->dgaReqType = X_XF86DGAGetVidPage; |
| 226 | req->screen = screen; |
| 227 | if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { |
| 228 | UnlockDisplay(dpy); |
| 229 | SyncHandle(); |
| 230 | return False; |
| 231 | } |
| 232 | |
| 233 | *vpage = rep.vpage; |
| 234 | UnlockDisplay(dpy); |
| 235 | SyncHandle(); |
| 236 | return True; |
| 237 | } |
| 238 | |
| 239 | |
| 240 | Bool SDL_NAME(XF86DGASetVidPage)( |
| 241 | Display* dpy, |
| 242 | int screen, |
| 243 | int vpage |
| 244 | ){ |
| 245 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 246 | xXF86DGASetVidPageReq *req; |
| 247 | |
| 248 | XF86DGACheckExtension (dpy, info, False); |
| 249 | |
| 250 | LockDisplay(dpy); |
| 251 | GetReq(XF86DGASetVidPage, req); |
| 252 | req->reqType = info->codes->major_opcode; |
| 253 | req->dgaReqType = X_XF86DGASetVidPage; |
| 254 | req->screen = screen; |
| 255 | req->vpage = vpage; |
| 256 | UnlockDisplay(dpy); |
| 257 | SyncHandle(); |
| 258 | XSync(dpy,False); |
| 259 | return True; |
| 260 | } |
| 261 | |
| 262 | Bool SDL_NAME(XF86DGAInstallColormap)( |
| 263 | Display* dpy, |
| 264 | int screen, |
| 265 | Colormap cmap |
| 266 | ){ |
| 267 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 268 | xXF86DGAInstallColormapReq *req; |
| 269 | |
| 270 | XF86DGACheckExtension (dpy, info, False); |
| 271 | |
| 272 | LockDisplay(dpy); |
| 273 | GetReq(XF86DGAInstallColormap, req); |
| 274 | req->reqType = info->codes->major_opcode; |
| 275 | req->dgaReqType = X_XF86DGAInstallColormap; |
| 276 | req->screen = screen; |
| 277 | req->id = cmap; |
| 278 | UnlockDisplay(dpy); |
| 279 | SyncHandle(); |
| 280 | XSync(dpy,False); |
| 281 | return True; |
| 282 | } |
| 283 | |
| 284 | Bool SDL_NAME(XF86DGAQueryDirectVideo)( |
| 285 | Display *dpy, |
| 286 | int screen, |
| 287 | int *flags |
| 288 | ){ |
| 289 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 290 | xXF86DGAQueryDirectVideoReply rep; |
| 291 | xXF86DGAQueryDirectVideoReq *req; |
| 292 | |
| 293 | XF86DGACheckExtension (dpy, info, False); |
| 294 | |
| 295 | LockDisplay(dpy); |
| 296 | GetReq(XF86DGAQueryDirectVideo, req); |
| 297 | req->reqType = info->codes->major_opcode; |
| 298 | req->dgaReqType = X_XF86DGAQueryDirectVideo; |
| 299 | req->screen = screen; |
| 300 | if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { |
| 301 | UnlockDisplay(dpy); |
| 302 | SyncHandle(); |
| 303 | return False; |
| 304 | } |
| 305 | *flags = rep.flags; |
| 306 | UnlockDisplay(dpy); |
| 307 | SyncHandle(); |
| 308 | return True; |
| 309 | } |
| 310 | |
| 311 | Bool SDL_NAME(XF86DGAViewPortChanged)( |
| 312 | Display *dpy, |
| 313 | int screen, |
| 314 | int n |
| 315 | ){ |
| 316 | XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy); |
| 317 | xXF86DGAViewPortChangedReply rep; |
| 318 | xXF86DGAViewPortChangedReq *req; |
| 319 | |
| 320 | XF86DGACheckExtension (dpy, info, False); |
| 321 | |
| 322 | LockDisplay(dpy); |
| 323 | GetReq(XF86DGAViewPortChanged, req); |
| 324 | req->reqType = info->codes->major_opcode; |
| 325 | req->dgaReqType = X_XF86DGAViewPortChanged; |
| 326 | req->screen = screen; |
| 327 | req->n = n; |
| 328 | if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) { |
| 329 | UnlockDisplay(dpy); |
| 330 | SyncHandle(); |
| 331 | return False; |
| 332 | } |
| 333 | UnlockDisplay(dpy); |
| 334 | SyncHandle(); |
| 335 | return rep.result; |
| 336 | } |
| 337 | |
| 338 | |
| 339 | |
| 340 | /* Helper functions */ |
| 341 | |
| 342 | #include <X11/Xmd.h> |
| 343 | #include "../extensions/xf86dga.h" |
| 344 | #include <stdlib.h> |
| 345 | #include <stdio.h> |
| 346 | #include <fcntl.h> |
| 347 | #if defined(ISC) |
| 348 | # define HAS_SVR3_MMAP |
| 349 | # include <sys/types.h> |
| 350 | # include <errno.h> |
| 351 | |
| 352 | # include <sys/at_ansi.h> |
| 353 | # include <sys/kd.h> |
| 354 | |
| 355 | # include <sys/sysmacros.h> |
| 356 | # include <sys/immu.h> |
| 357 | # include <sys/region.h> |
| 358 | |
| 359 | # include <sys/mmap.h> |
| 360 | #else |
| 361 | # if !defined(Lynx) |
| 362 | # if !defined(__EMX__) |
| 363 | # include <sys/mman.h> |
| 364 | # endif |
| 365 | # else |
| 366 | # include <sys/types.h> |
| 367 | # include <errno.h> |
| 368 | # include <smem.h> |
| 369 | # endif |
| 370 | #endif |
| 371 | #include <sys/wait.h> |
| 372 | #include <signal.h> |
| 373 | #include <unistd.h> |
| 374 | |
| 375 | #if defined(SVR4) && !defined(sun) && !defined(SCO325) |
| 376 | #define DEV_MEM "/dev/pmem" |
| 377 | #elif defined(SVR4) && defined(sun) |
| 378 | #define DEV_MEM "/dev/xsvc" |
| 379 | #else |
| 380 | #define DEV_MEM "/dev/mem" |
| 381 | #endif |
| 382 | |
| 383 | typedef struct { |
| 384 | unsigned long physaddr; /* actual requested physical address */ |
| 385 | unsigned long size; /* actual requested map size */ |
| 386 | unsigned long delta; /* delta to account for page alignment */ |
| 387 | void * vaddr; /* mapped address, without the delta */ |
| 388 | int refcount; /* reference count */ |
| 389 | } MapRec, *MapPtr; |
| 390 | |
| 391 | typedef struct { |
| 392 | Display * display; |
| 393 | int screen; |
| 394 | MapPtr map; |
| 395 | } ScrRec, *ScrPtr; |
| 396 | |
| 397 | static int mapFd = -1; |
| 398 | static int numMaps = 0; |
| 399 | static int numScrs = 0; |
| 400 | static MapPtr *mapList = NULL; |
| 401 | static ScrPtr *scrList = NULL; |
| 402 | |
| 403 | static MapPtr |
| 404 | AddMap(void) |
| 405 | { |
| 406 | MapPtr *old; |
| 407 | |
| 408 | old = mapList; |
| 409 | mapList = realloc(mapList, sizeof(MapPtr) * (numMaps + 1)); |
| 410 | if (!mapList) { |
| 411 | mapList = old; |
| 412 | return NULL; |
| 413 | } |
| 414 | mapList[numMaps] = malloc(sizeof(MapRec)); |
| 415 | if (!mapList[numMaps]) |
| 416 | return NULL; |
| 417 | return mapList[numMaps++]; |
| 418 | } |
| 419 | |
| 420 | static ScrPtr |
| 421 | AddScr(void) |
| 422 | { |
| 423 | ScrPtr *old; |
| 424 | |
| 425 | old = scrList; |
| 426 | scrList = realloc(scrList, sizeof(ScrPtr) * (numScrs + 1)); |
| 427 | if (!scrList) { |
| 428 | scrList = old; |
| 429 | return NULL; |
| 430 | } |
| 431 | scrList[numScrs] = malloc(sizeof(ScrRec)); |
| 432 | if (!scrList[numScrs]) |
| 433 | return NULL; |
| 434 | return scrList[numScrs++]; |
| 435 | } |
| 436 | |
| 437 | static MapPtr |
| 438 | FindMap(unsigned long address, unsigned long size) |
| 439 | { |
| 440 | int i; |
| 441 | |
| 442 | for (i = 0; i < numMaps; i++) { |
| 443 | if (mapList[i]->physaddr == address && |
| 444 | mapList[i]->size == size) |
| 445 | return mapList[i]; |
| 446 | } |
| 447 | return NULL; |
| 448 | } |
| 449 | |
| 450 | static ScrPtr |
| 451 | FindScr(Display *display, int screen) |
| 452 | { |
| 453 | int i; |
| 454 | |
| 455 | for (i = 0; i < numScrs; i++) { |
| 456 | if (scrList[i]->display == display && |
| 457 | scrList[i]->screen == screen) |
| 458 | return scrList[i]; |
| 459 | } |
| 460 | return NULL; |
| 461 | } |
| 462 | |
| 463 | static void * |
| 464 | MapPhysAddress(unsigned long address, unsigned long size) |
| 465 | { |
| 466 | unsigned long offset, delta; |
| 467 | int pagesize = -1; |
| 468 | void *vaddr; |
| 469 | MapPtr mp; |
| 470 | #if defined(ISC) && defined(HAS_SVR3_MMAP) |
| 471 | struct kd_memloc mloc; |
| 472 | #elif defined(__EMX__) |
| 473 | APIRET rc; |
| 474 | ULONG action; |
| 475 | HFILE hfd; |
| 476 | #endif |
| 477 | |
| 478 | if ((mp = FindMap(address, size))) { |
| 479 | mp->refcount++; |
| 480 | return (void *)((unsigned long)mp->vaddr + mp->delta); |
| 481 | } |
| 482 | |
| 483 | #if defined(_SC_PAGESIZE) && defined(HAS_SC_PAGESIZE) |
| 484 | pagesize = sysconf(_SC_PAGESIZE); |
| 485 | #endif |
| 486 | #ifdef _SC_PAGE_SIZE |
| 487 | if (pagesize == -1) |
| 488 | pagesize = sysconf(_SC_PAGE_SIZE); |
| 489 | #endif |
| 490 | #ifdef HAS_GETPAGESIZE |
| 491 | if (pagesize == -1) |
| 492 | pagesize = getpagesize(); |
| 493 | #endif |
| 494 | #ifdef PAGE_SIZE |
| 495 | if (pagesize == -1) |
| 496 | pagesize = PAGE_SIZE; |
| 497 | #endif |
| 498 | if (pagesize == -1) |
| 499 | pagesize = 4096; |
| 500 | |
| 501 | delta = address % pagesize; |
| 502 | offset = address - delta; |
| 503 | |
| 504 | #if defined(ISC) && defined(HAS_SVR3_MMAP) |
| 505 | if (mapFd < 0) { |
| 506 | if ((mapFd = open("/dev/mmap", O_RDWR)) < 0) |
| 507 | return NULL; |
| 508 | } |
| 509 | mloc.vaddr = (char *)0; |
| 510 | mloc.physaddr = (char *)offset; |
| 511 | mloc.length = size + delta; |
| 512 | mloc.ioflg=1; |
| 513 | |
| 514 | if ((vaddr = (void *)ioctl(mapFd, MAP, &mloc)) == (void *)-1) |
| 515 | return NULL; |
| 516 | #elif defined (__EMX__) |
| 517 | /* |
| 518 | * Dragon warning here! /dev/pmap$ is never closed, except on progam exit. |
| 519 | * Consecutive calling of this routine will make PMAP$ driver run out |
| 520 | * of memory handles. Some umap/close mechanism should be provided |
| 521 | */ |
| 522 | |
| 523 | rc = DosOpen("/dev/pmap$", &hfd, &action, 0, FILE_NORMAL, FILE_OPEN, |
| 524 | OPEN_ACCESS_READWRITE | OPEN_SHARE_DENYNONE, (PEAOP2)NULL); |
| 525 | if (rc != 0) |
| 526 | return NULL; |
| 527 | { |
| 528 | struct map_ioctl { |
| 529 | union { |
| 530 | ULONG phys; |
| 531 | void* user; |
| 532 | } a; |
| 533 | ULONG size; |
| 534 | } pmap,dmap; |
| 535 | ULONG plen,dlen; |
| 536 | #define XFREE86_PMAP 0x76 |
| 537 | #define PMAP_MAP 0x44 |
| 538 | |
| 539 | pmap.a.phys = offset; |
| 540 | pmap.size = size + delta; |
| 541 | rc = DosDevIOCtl(hfd, XFREE86_PMAP, PMAP_MAP, |
| 542 | (PULONG)&pmap, sizeof(pmap), &plen, |
| 543 | (PULONG)&dmap, sizeof(dmap), &dlen); |
| 544 | if (rc == 0) { |
| 545 | vaddr = dmap.a.user; |
| 546 | } |
| 547 | } |
| 548 | if (rc != 0) |
| 549 | return NULL; |
| 550 | #elif defined (Lynx) |
| 551 | vaddr = (void *)smem_create("XF86DGA", (char *)offset, |
| 552 | size + delta, SM_READ|SM_WRITE); |
| 553 | #else |
| 554 | #ifndef MAP_FILE |
| 555 | #define MAP_FILE 0 |
| 556 | #endif |
| 557 | if (mapFd < 0) { |
| 558 | if ((mapFd = open(DEV_MEM, O_RDWR)) < 0) |
| 559 | return NULL; |
| 560 | } |
| 561 | vaddr = (void *)mmap(NULL, size + delta, PROT_READ | PROT_WRITE, |
| 562 | MAP_FILE | MAP_SHARED, mapFd, (off_t)offset); |
| 563 | if (vaddr == (void *)-1) |
| 564 | return NULL; |
| 565 | #endif |
| 566 | |
| 567 | if (!vaddr) { |
| 568 | if (!(mp = AddMap())) |
| 569 | return NULL; |
| 570 | mp->physaddr = address; |
| 571 | mp->size = size; |
| 572 | mp->delta = delta; |
| 573 | mp->vaddr = vaddr; |
| 574 | mp->refcount = 1; |
| 575 | } |
| 576 | return (void *)((unsigned long)vaddr + delta); |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * Still need to find a clean way of detecting the death of a DGA app |
| 581 | * and returning things to normal - Jon |
| 582 | * This is here to help debugging without rebooting... Also C-A-BS |
| 583 | * should restore text mode. |
| 584 | */ |
| 585 | |
| 586 | int |
| 587 | SDL_NAME(XF86DGAForkApp)(int screen) |
| 588 | { |
| 589 | pid_t pid; |
| 590 | int status; |
| 591 | int i; |
| 592 | |
| 593 | /* fork the app, parent hangs around to clean up */ |
| 594 | if ((pid = fork()) > 0) { |
| 595 | ScrPtr sp; |
| 596 | |
| 597 | waitpid(pid, &status, 0); |
| 598 | for (i = 0; i < numScrs; i++) { |
| 599 | sp = scrList[i]; |
| 600 | SDL_NAME(XF86DGADirectVideoLL)(sp->display, sp->screen, 0); |
| 601 | XSync(sp->display, False); |
| 602 | } |
| 603 | if (WIFEXITED(status)) |
| 604 | _exit(0); |
| 605 | else |
| 606 | _exit(-1); |
| 607 | } |
| 608 | return pid; |
| 609 | } |
| 610 | |
| 611 | |
| 612 | Bool |
| 613 | SDL_NAME(XF86DGADirectVideo)( |
| 614 | Display *dis, |
| 615 | int screen, |
| 616 | int enable |
| 617 | ){ |
| 618 | ScrPtr sp; |
| 619 | MapPtr mp = NULL; |
| 620 | |
| 621 | if ((sp = FindScr(dis, screen))) |
| 622 | mp = sp->map; |
| 623 | |
| 624 | if (enable & XF86DGADirectGraphics) { |
| 625 | #if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx) \ |
| 626 | && !defined(__EMX__) |
| 627 | if (mp && mp->vaddr) |
| 628 | mprotect(mp->vaddr, mp->size + mp->delta, PROT_READ | PROT_WRITE); |
| 629 | #endif |
| 630 | } else { |
| 631 | #if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx) \ |
| 632 | && !defined(__EMX__) |
| 633 | if (mp && mp->vaddr) |
| 634 | mprotect(mp->vaddr, mp->size + mp->delta, PROT_READ); |
| 635 | #elif defined(Lynx) |
| 636 | /* XXX this doesn't allow enable after disable */ |
| 637 | smem_create(NULL, mp->vaddr, mp->size + mp->delta, SM_DETACH); |
| 638 | smem_remove("XF86DGA"); |
| 639 | #endif |
| 640 | } |
| 641 | |
| 642 | SDL_NAME(XF86DGADirectVideoLL)(dis, screen, enable); |
| 643 | return 1; |
| 644 | } |
| 645 | |
| 646 | |
| 647 | static void |
| 648 | XF86cleanup(int sig) |
| 649 | { |
| 650 | ScrPtr sp; |
| 651 | int i; |
| 652 | static char beenhere = 0; |
| 653 | |
| 654 | if (beenhere) |
| 655 | _exit(3); |
| 656 | beenhere = 1; |
| 657 | |
| 658 | for (i = 0; i < numScrs; i++) { |
| 659 | sp = scrList[i]; |
| 660 | SDL_NAME(XF86DGADirectVideo)(sp->display, sp->screen, 0); |
| 661 | XSync(sp->display, False); |
| 662 | } |
| 663 | _exit(3); |
| 664 | } |
| 665 | |
| 666 | Bool |
| 667 | SDL_NAME(XF86DGAGetVideo)( |
| 668 | Display *dis, |
| 669 | int screen, |
| 670 | char **addr, |
| 671 | int *width, |
| 672 | int *bank, |
| 673 | int *ram |
| 674 | ){ |
| 675 | /*unsigned long*/ int offset; |
| 676 | static int beenHere = 0; |
| 677 | ScrPtr sp; |
| 678 | MapPtr mp; |
| 679 | |
| 680 | if (!(sp = FindScr(dis, screen))) { |
| 681 | if (!(sp = AddScr())) { |
| 682 | fprintf(stderr, "XF86DGAGetVideo: malloc failure\n"); |
| 683 | exit(-2); |
| 684 | } |
| 685 | sp->display = dis; |
| 686 | sp->screen = screen; |
| 687 | sp->map = NULL; |
| 688 | } |
| 689 | |
| 690 | SDL_NAME(XF86DGAGetVideoLL)(dis, screen , &offset, width, bank, ram); |
| 691 | |
| 692 | *addr = MapPhysAddress(offset, *bank); |
| 693 | if (*addr == NULL) { |
| 694 | fprintf(stderr, "XF86DGAGetVideo: failed to map video memory (%s)\n", |
| 695 | strerror(errno)); |
| 696 | exit(-2); |
| 697 | } |
| 698 | |
| 699 | if ((mp = FindMap(offset, *bank))) |
| 700 | sp->map = mp; |
| 701 | |
| 702 | if (!beenHere) { |
| 703 | beenHere = 1; |
| 704 | atexit((void(*)(void))XF86cleanup); |
| 705 | /* one shot XF86cleanup attempts */ |
| 706 | signal(SIGSEGV, XF86cleanup); |
| 707 | #ifdef SIGBUS |
| 708 | signal(SIGBUS, XF86cleanup); |
| 709 | #endif |
| 710 | signal(SIGHUP, XF86cleanup); |
| 711 | signal(SIGFPE, XF86cleanup); |
| 712 | } |
| 713 | |
| 714 | return 1; |
| 715 | } |
| 716 | |