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1.1 ! root 1: // 16bit code to access hard drives. ! 2: // ! 3: // Copyright (C) 2008 Kevin O'Connor <[email protected]> ! 4: // Copyright (C) 2002 MandrakeSoft S.A. ! 5: // ! 6: // This file may be distributed under the terms of the GNU LGPLv3 license. ! 7: ! 8: #include "disk.h" // floppy_13 ! 9: #include "biosvar.h" // SET_BDA ! 10: #include "config.h" // CONFIG_* ! 11: #include "util.h" // debug_enter ! 12: #include "pic.h" // eoi_pic2 ! 13: #include "bregs.h" // struct bregs ! 14: #include "pci.h" // pci_bdf_to_bus ! 15: #include "ata.h" // ATA_CB_DC ! 16: ! 17: ! 18: /**************************************************************** ! 19: * Helper functions ! 20: ****************************************************************/ ! 21: ! 22: void ! 23: __disk_ret(struct bregs *regs, u32 linecode, const char *fname) ! 24: { ! 25: u8 code = linecode; ! 26: if (regs->dl < EXTSTART_HD) ! 27: SET_BDA(floppy_last_status, code); ! 28: else ! 29: SET_BDA(disk_last_status, code); ! 30: if (code) ! 31: __set_code_invalid(regs, linecode, fname); ! 32: else ! 33: set_code_success(regs); ! 34: } ! 35: ! 36: void ! 37: __disk_ret_unimplemented(struct bregs *regs, u32 linecode, const char *fname) ! 38: { ! 39: u8 code = linecode; ! 40: if (regs->dl < EXTSTART_HD) ! 41: SET_BDA(floppy_last_status, code); ! 42: else ! 43: SET_BDA(disk_last_status, code); ! 44: __set_code_unimplemented(regs, linecode, fname); ! 45: } ! 46: ! 47: static void ! 48: __disk_stub(struct bregs *regs, int lineno, const char *fname) ! 49: { ! 50: __warn_unimplemented(regs, lineno, fname); ! 51: __disk_ret(regs, DISK_RET_SUCCESS | (lineno << 8), fname); ! 52: } ! 53: ! 54: #define DISK_STUB(regs) \ ! 55: __disk_stub((regs), __LINE__, __func__) ! 56: ! 57: static void ! 58: fillLCHS(struct drive_s *drive_g, u16 *nlc, u16 *nlh, u16 *nlspt) ! 59: { ! 60: if (CONFIG_CDROM_EMU && drive_g == GET_GLOBAL(cdemu_drive)) { ! 61: // Emulated drive - get info from ebda. (It's not possible to ! 62: // populate the geometry directly in the driveid because the ! 63: // geometry is only known after the bios segment is made ! 64: // read-only). ! 65: u16 ebda_seg = get_ebda_seg(); ! 66: *nlc = GET_EBDA2(ebda_seg, cdemu.lchs.cylinders); ! 67: *nlh = GET_EBDA2(ebda_seg, cdemu.lchs.heads); ! 68: *nlspt = GET_EBDA2(ebda_seg, cdemu.lchs.spt); ! 69: return; ! 70: } ! 71: *nlc = GET_GLOBAL(drive_g->lchs.cylinders); ! 72: *nlh = GET_GLOBAL(drive_g->lchs.heads); ! 73: *nlspt = GET_GLOBAL(drive_g->lchs.spt); ! 74: } ! 75: ! 76: // Perform read/write/verify using old-style chs accesses ! 77: static void ! 78: basic_access(struct bregs *regs, struct drive_s *drive_g, u16 command) ! 79: { ! 80: struct disk_op_s dop; ! 81: dop.drive_g = drive_g; ! 82: dop.command = command; ! 83: ! 84: u8 count = regs->al; ! 85: u16 cylinder = regs->ch | ((((u16)regs->cl) << 2) & 0x300); ! 86: u16 sector = regs->cl & 0x3f; ! 87: u16 head = regs->dh; ! 88: ! 89: if (count > 128 || count == 0 || sector == 0) { ! 90: dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n" ! 91: , regs->ah); ! 92: disk_ret(regs, DISK_RET_EPARAM); ! 93: return; ! 94: } ! 95: dop.count = count; ! 96: ! 97: u16 nlc, nlh, nlspt; ! 98: fillLCHS(drive_g, &nlc, &nlh, &nlspt); ! 99: ! 100: // sanity check on cyl heads, sec ! 101: if (cylinder >= nlc || head >= nlh || sector > nlspt) { ! 102: dprintf(1, "int13_harddisk: function %02x, parameters out of" ! 103: " range %04x/%04x/%04x!\n" ! 104: , regs->ah, cylinder, head, sector); ! 105: disk_ret(regs, DISK_RET_EPARAM); ! 106: return; ! 107: } ! 108: ! 109: // translate lchs to lba ! 110: dop.lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt) ! 111: + (u32)sector - 1); ! 112: ! 113: dop.buf_fl = MAKE_FLATPTR(regs->es, regs->bx); ! 114: ! 115: int status = send_disk_op(&dop); ! 116: ! 117: regs->al = dop.count; ! 118: ! 119: disk_ret(regs, status); ! 120: } ! 121: ! 122: // Perform read/write/verify using new-style "int13ext" accesses. ! 123: static void ! 124: extended_access(struct bregs *regs, struct drive_s *drive_g, u16 command) ! 125: { ! 126: struct disk_op_s dop; ! 127: // Get lba and check. ! 128: dop.lba = GET_INT13EXT(regs, lba); ! 129: dop.command = command; ! 130: dop.drive_g = drive_g; ! 131: if (dop.lba >= GET_GLOBAL(drive_g->sectors)) { ! 132: dprintf(1, "int13_harddisk: function %02x. LBA out of range\n" ! 133: , regs->ah); ! 134: disk_ret(regs, DISK_RET_EPARAM); ! 135: return; ! 136: } ! 137: ! 138: dop.buf_fl = SEGOFF_TO_FLATPTR(GET_INT13EXT(regs, data)); ! 139: dop.count = GET_INT13EXT(regs, count); ! 140: ! 141: int status = send_disk_op(&dop); ! 142: ! 143: SET_INT13EXT(regs, count, dop.count); ! 144: ! 145: disk_ret(regs, status); ! 146: } ! 147: ! 148: ! 149: /**************************************************************** ! 150: * Hard Drive functions ! 151: ****************************************************************/ ! 152: ! 153: // disk controller reset ! 154: static void ! 155: disk_1300(struct bregs *regs, struct drive_s *drive_g) ! 156: { ! 157: struct disk_op_s dop; ! 158: dop.drive_g = drive_g; ! 159: dop.command = CMD_RESET; ! 160: int status = send_disk_op(&dop); ! 161: disk_ret(regs, status); ! 162: } ! 163: ! 164: // read disk status ! 165: static void ! 166: disk_1301(struct bregs *regs, struct drive_s *drive_g) ! 167: { ! 168: u8 v; ! 169: if (regs->dl < EXTSTART_HD) ! 170: // Floppy ! 171: v = GET_BDA(floppy_last_status); ! 172: else ! 173: v = GET_BDA(disk_last_status); ! 174: regs->ah = v; ! 175: set_cf(regs, v); ! 176: // XXX - clear disk_last_status? ! 177: } ! 178: ! 179: // read disk sectors ! 180: static void ! 181: disk_1302(struct bregs *regs, struct drive_s *drive_g) ! 182: { ! 183: basic_access(regs, drive_g, CMD_READ); ! 184: } ! 185: ! 186: // write disk sectors ! 187: static void ! 188: disk_1303(struct bregs *regs, struct drive_s *drive_g) ! 189: { ! 190: basic_access(regs, drive_g, CMD_WRITE); ! 191: } ! 192: ! 193: // verify disk sectors ! 194: static void ! 195: disk_1304(struct bregs *regs, struct drive_s *drive_g) ! 196: { ! 197: basic_access(regs, drive_g, CMD_VERIFY); ! 198: } ! 199: ! 200: // format disk track ! 201: static void ! 202: disk_1305(struct bregs *regs, struct drive_s *drive_g) ! 203: { ! 204: debug_stub(regs); ! 205: ! 206: u16 nlc, nlh, nlspt; ! 207: fillLCHS(drive_g, &nlc, &nlh, &nlspt); ! 208: ! 209: u8 num_sectors = regs->al; ! 210: u8 head = regs->dh; ! 211: ! 212: if (head >= nlh || num_sectors == 0 || num_sectors > nlspt) { ! 213: disk_ret(regs, DISK_RET_EPARAM); ! 214: return; ! 215: } ! 216: ! 217: struct disk_op_s dop; ! 218: dop.drive_g = drive_g; ! 219: dop.command = CMD_FORMAT; ! 220: dop.lba = head; ! 221: dop.count = num_sectors; ! 222: dop.buf_fl = MAKE_FLATPTR(regs->es, regs->bx); ! 223: int status = send_disk_op(&dop); ! 224: disk_ret(regs, status); ! 225: } ! 226: ! 227: // read disk drive parameters ! 228: static void ! 229: disk_1308(struct bregs *regs, struct drive_s *drive_g) ! 230: { ! 231: u16 ebda_seg = get_ebda_seg(); ! 232: // Get logical geometry from table ! 233: u16 nlc, nlh, nlspt; ! 234: fillLCHS(drive_g, &nlc, &nlh, &nlspt); ! 235: nlc--; ! 236: nlh--; ! 237: u8 count; ! 238: if (regs->dl < EXTSTART_HD) { ! 239: // Floppy ! 240: count = GET_GLOBAL(Drives.floppycount); ! 241: ! 242: if (CONFIG_CDROM_EMU && drive_g == GET_GLOBAL(cdemu_drive)) ! 243: regs->bx = GET_EBDA2(ebda_seg, cdemu.media) * 2; ! 244: else ! 245: regs->bx = GET_GLOBAL(drive_g->floppy_type); ! 246: ! 247: // set es & di to point to 11 byte diskette param table in ROM ! 248: regs->es = SEG_BIOS; ! 249: regs->di = (u32)&diskette_param_table2; ! 250: } else if (regs->dl < EXTSTART_CD) { ! 251: // Hard drive ! 252: count = GET_BDA(hdcount); ! 253: nlc--; // last sector reserved ! 254: } else { ! 255: // Not supported on CDROM ! 256: disk_ret(regs, DISK_RET_EPARAM); ! 257: return; ! 258: } ! 259: ! 260: if (CONFIG_CDROM_EMU && GET_EBDA2(ebda_seg, cdemu.active)) { ! 261: u8 emudrive = GET_EBDA2(ebda_seg, cdemu.emulated_extdrive); ! 262: if (((emudrive ^ regs->dl) & 0x80) == 0) ! 263: // Note extra drive due to emulation. ! 264: count++; ! 265: if (regs->dl < EXTSTART_HD && count > 2) ! 266: // Max of two floppy drives. ! 267: count = 2; ! 268: } ! 269: ! 270: regs->al = 0; ! 271: regs->ch = nlc & 0xff; ! 272: regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f); ! 273: regs->dh = nlh; ! 274: ! 275: disk_ret(regs, DISK_RET_SUCCESS); ! 276: regs->dl = count; ! 277: } ! 278: ! 279: // initialize drive parameters ! 280: static void ! 281: disk_1309(struct bregs *regs, struct drive_s *drive_g) ! 282: { ! 283: DISK_STUB(regs); ! 284: } ! 285: ! 286: // seek to specified cylinder ! 287: static void ! 288: disk_130c(struct bregs *regs, struct drive_s *drive_g) ! 289: { ! 290: DISK_STUB(regs); ! 291: } ! 292: ! 293: // alternate disk reset ! 294: static void ! 295: disk_130d(struct bregs *regs, struct drive_s *drive_g) ! 296: { ! 297: DISK_STUB(regs); ! 298: } ! 299: ! 300: // check drive ready ! 301: static void ! 302: disk_1310(struct bregs *regs, struct drive_s *drive_g) ! 303: { ! 304: // should look at 40:8E also??? ! 305: ! 306: struct disk_op_s dop; ! 307: dop.drive_g = drive_g; ! 308: dop.command = CMD_ISREADY; ! 309: int status = send_disk_op(&dop); ! 310: disk_ret(regs, status); ! 311: } ! 312: ! 313: // recalibrate ! 314: static void ! 315: disk_1311(struct bregs *regs, struct drive_s *drive_g) ! 316: { ! 317: DISK_STUB(regs); ! 318: } ! 319: ! 320: // controller internal diagnostic ! 321: static void ! 322: disk_1314(struct bregs *regs, struct drive_s *drive_g) ! 323: { ! 324: DISK_STUB(regs); ! 325: } ! 326: ! 327: // read disk drive size ! 328: static void ! 329: disk_1315(struct bregs *regs, struct drive_s *drive_g) ! 330: { ! 331: disk_ret(regs, DISK_RET_SUCCESS); ! 332: if (regs->dl < EXTSTART_HD || regs->dl >= EXTSTART_CD) { ! 333: // Floppy or cdrom ! 334: regs->ah = 1; ! 335: return; ! 336: } ! 337: // Hard drive ! 338: ! 339: // Get logical geometry from table ! 340: u16 nlc, nlh, nlspt; ! 341: fillLCHS(drive_g, &nlc, &nlh, &nlspt); ! 342: ! 343: // Compute sector count seen by int13 ! 344: u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt; ! 345: regs->cx = lba >> 16; ! 346: regs->dx = lba & 0xffff; ! 347: regs->ah = 3; // hard disk accessible ! 348: } ! 349: ! 350: static void ! 351: disk_1316(struct bregs *regs, struct drive_s *drive_g) ! 352: { ! 353: if (regs->dl >= EXTSTART_HD) { ! 354: // Hard drive ! 355: disk_ret(regs, DISK_RET_EPARAM); ! 356: return; ! 357: } ! 358: disk_ret(regs, DISK_RET_ECHANGED); ! 359: } ! 360: ! 361: // IBM/MS installation check ! 362: static void ! 363: disk_1341(struct bregs *regs, struct drive_s *drive_g) ! 364: { ! 365: regs->bx = 0xaa55; // install check ! 366: regs->cx = 0x0007; // ext disk access and edd, removable supported ! 367: disk_ret(regs, DISK_RET_SUCCESS); ! 368: regs->ah = 0x30; // EDD 3.0 ! 369: } ! 370: ! 371: // IBM/MS extended read ! 372: static void ! 373: disk_1342(struct bregs *regs, struct drive_s *drive_g) ! 374: { ! 375: extended_access(regs, drive_g, CMD_READ); ! 376: } ! 377: ! 378: // IBM/MS extended write ! 379: static void ! 380: disk_1343(struct bregs *regs, struct drive_s *drive_g) ! 381: { ! 382: extended_access(regs, drive_g, CMD_WRITE); ! 383: } ! 384: ! 385: // IBM/MS verify ! 386: static void ! 387: disk_1344(struct bregs *regs, struct drive_s *drive_g) ! 388: { ! 389: extended_access(regs, drive_g, CMD_VERIFY); ! 390: } ! 391: ! 392: // lock ! 393: static void ! 394: disk_134500(struct bregs *regs, struct drive_s *drive_g) ! 395: { ! 396: u16 ebda_seg = get_ebda_seg(); ! 397: int cdid = regs->dl - EXTSTART_CD; ! 398: u8 locks = GET_EBDA2(ebda_seg, cdrom_locks[cdid]); ! 399: if (locks == 0xff) { ! 400: regs->al = 1; ! 401: disk_ret(regs, DISK_RET_ETOOMANYLOCKS); ! 402: return; ! 403: } ! 404: SET_EBDA2(ebda_seg, cdrom_locks[cdid], locks + 1); ! 405: regs->al = 1; ! 406: disk_ret(regs, DISK_RET_SUCCESS); ! 407: } ! 408: ! 409: // unlock ! 410: static void ! 411: disk_134501(struct bregs *regs, struct drive_s *drive_g) ! 412: { ! 413: u16 ebda_seg = get_ebda_seg(); ! 414: int cdid = regs->dl - EXTSTART_CD; ! 415: u8 locks = GET_EBDA2(ebda_seg, cdrom_locks[cdid]); ! 416: if (locks == 0x00) { ! 417: regs->al = 0; ! 418: disk_ret(regs, DISK_RET_ENOTLOCKED); ! 419: return; ! 420: } ! 421: locks--; ! 422: SET_EBDA2(ebda_seg, cdrom_locks[cdid], locks); ! 423: regs->al = (locks ? 1 : 0); ! 424: disk_ret(regs, DISK_RET_SUCCESS); ! 425: } ! 426: ! 427: // status ! 428: static void ! 429: disk_134502(struct bregs *regs, struct drive_s *drive_g) ! 430: { ! 431: int cdid = regs->dl - EXTSTART_CD; ! 432: u8 locks = GET_EBDA(cdrom_locks[cdid]); ! 433: regs->al = (locks ? 1 : 0); ! 434: disk_ret(regs, DISK_RET_SUCCESS); ! 435: } ! 436: ! 437: static void ! 438: disk_1345XX(struct bregs *regs, struct drive_s *drive_g) ! 439: { ! 440: disk_ret_unimplemented(regs, DISK_RET_EPARAM); ! 441: } ! 442: ! 443: // IBM/MS lock/unlock drive ! 444: static void ! 445: disk_1345(struct bregs *regs, struct drive_s *drive_g) ! 446: { ! 447: if (regs->dl < EXTSTART_CD) { ! 448: // Always success for HD ! 449: disk_ret(regs, DISK_RET_SUCCESS); ! 450: return; ! 451: } ! 452: ! 453: switch (regs->al) { ! 454: case 0x00: disk_134500(regs, drive_g); break; ! 455: case 0x01: disk_134501(regs, drive_g); break; ! 456: case 0x02: disk_134502(regs, drive_g); break; ! 457: default: disk_1345XX(regs, drive_g); break; ! 458: } ! 459: } ! 460: ! 461: // IBM/MS eject media ! 462: static void ! 463: disk_1346(struct bregs *regs, struct drive_s *drive_g) ! 464: { ! 465: if (regs->dl < EXTSTART_CD) { ! 466: // Volume Not Removable ! 467: disk_ret(regs, DISK_RET_ENOTREMOVABLE); ! 468: return; ! 469: } ! 470: ! 471: int cdid = regs->dl - EXTSTART_CD; ! 472: u8 locks = GET_EBDA(cdrom_locks[cdid]); ! 473: if (locks != 0) { ! 474: disk_ret(regs, DISK_RET_ELOCKED); ! 475: return; ! 476: } ! 477: ! 478: // FIXME should handle 0x31 no media in device ! 479: // FIXME should handle 0xb5 valid request failed ! 480: ! 481: // Call removable media eject ! 482: struct bregs br; ! 483: memset(&br, 0, sizeof(br)); ! 484: br.ah = 0x52; ! 485: call16_int(0x15, &br); ! 486: ! 487: if (br.ah || br.flags & F_CF) { ! 488: disk_ret(regs, DISK_RET_ELOCKED); ! 489: return; ! 490: } ! 491: disk_ret(regs, DISK_RET_SUCCESS); ! 492: } ! 493: ! 494: // IBM/MS extended seek ! 495: static void ! 496: disk_1347(struct bregs *regs, struct drive_s *drive_g) ! 497: { ! 498: extended_access(regs, drive_g, CMD_SEEK); ! 499: } ! 500: ! 501: // IBM/MS get drive parameters ! 502: static void ! 503: disk_1348(struct bregs *regs, struct drive_s *drive_g) ! 504: { ! 505: u16 size = GET_INT13DPT(regs, size); ! 506: ! 507: // Buffer is too small ! 508: if (size < 26) { ! 509: disk_ret(regs, DISK_RET_EPARAM); ! 510: return; ! 511: } ! 512: ! 513: // EDD 1.x ! 514: ! 515: u8 type = GET_GLOBAL(drive_g->type); ! 516: u16 npc = GET_GLOBAL(drive_g->pchs.cylinders); ! 517: u16 nph = GET_GLOBAL(drive_g->pchs.heads); ! 518: u16 npspt = GET_GLOBAL(drive_g->pchs.spt); ! 519: u64 lba = GET_GLOBAL(drive_g->sectors); ! 520: u16 blksize = GET_GLOBAL(drive_g->blksize); ! 521: ! 522: dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n" ! 523: , size, type, npc, nph, npspt, (u32)lba, blksize); ! 524: ! 525: SET_INT13DPT(regs, size, 26); ! 526: if (type == DTYPE_ATAPI) { ! 527: // 0x74 = removable, media change, lockable, max values ! 528: SET_INT13DPT(regs, infos, 0x74); ! 529: SET_INT13DPT(regs, cylinders, 0xffffffff); ! 530: SET_INT13DPT(regs, heads, 0xffffffff); ! 531: SET_INT13DPT(regs, spt, 0xffffffff); ! 532: SET_INT13DPT(regs, sector_count, (u64)-1); ! 533: } else { ! 534: if (lba > (u64)npspt*nph*0x3fff) { ! 535: SET_INT13DPT(regs, infos, 0x00); // geometry is invalid ! 536: SET_INT13DPT(regs, cylinders, 0x3fff); ! 537: } else { ! 538: SET_INT13DPT(regs, infos, 0x02); // geometry is valid ! 539: SET_INT13DPT(regs, cylinders, (u32)npc); ! 540: } ! 541: SET_INT13DPT(regs, heads, (u32)nph); ! 542: SET_INT13DPT(regs, spt, (u32)npspt); ! 543: SET_INT13DPT(regs, sector_count, lba); ! 544: } ! 545: SET_INT13DPT(regs, blksize, blksize); ! 546: ! 547: if (size < 30 || (type != DTYPE_ATA && type != DTYPE_ATAPI)) { ! 548: disk_ret(regs, DISK_RET_SUCCESS); ! 549: return; ! 550: } ! 551: ! 552: // EDD 2.x ! 553: ! 554: u16 ebda_seg = get_ebda_seg(); ! 555: SET_INT13DPT(regs, size, 30); ! 556: ! 557: SET_INT13DPT(regs, dpte_segment, ebda_seg); ! 558: SET_INT13DPT(regs, dpte_offset ! 559: , offsetof(struct extended_bios_data_area_s, dpte)); ! 560: ! 561: // Fill in dpte ! 562: u8 ataid = GET_GLOBAL(drive_g->cntl_id); ! 563: u8 channel = ataid / 2; ! 564: u8 slave = ataid % 2; ! 565: u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1); ! 566: u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2); ! 567: u8 irq = GET_GLOBAL(ATA_channels[channel].irq); ! 568: ! 569: u16 options = 0; ! 570: if (type == DTYPE_ATA) { ! 571: u8 translation = GET_GLOBAL(drive_g->translation); ! 572: if (translation != TRANSLATION_NONE) { ! 573: options |= 1<<3; // CHS translation ! 574: if (translation == TRANSLATION_LBA) ! 575: options |= 1<<9; ! 576: if (translation == TRANSLATION_RECHS) ! 577: options |= 3<<9; ! 578: } ! 579: } else { ! 580: // ATAPI ! 581: options |= 1<<5; // removable device ! 582: options |= 1<<6; // atapi device ! 583: } ! 584: options |= 1<<4; // lba translation ! 585: if (CONFIG_ATA_PIO32) ! 586: options |= 1<<7; ! 587: ! 588: SET_EBDA2(ebda_seg, dpte.iobase1, iobase1); ! 589: SET_EBDA2(ebda_seg, dpte.iobase2, iobase2 + ATA_CB_DC); ! 590: SET_EBDA2(ebda_seg, dpte.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) ! 591: | ATA_CB_DH_LBA)); ! 592: SET_EBDA2(ebda_seg, dpte.unused, 0xcb); ! 593: SET_EBDA2(ebda_seg, dpte.irq, irq); ! 594: SET_EBDA2(ebda_seg, dpte.blkcount, 1); ! 595: SET_EBDA2(ebda_seg, dpte.dma, 0); ! 596: SET_EBDA2(ebda_seg, dpte.pio, 0); ! 597: SET_EBDA2(ebda_seg, dpte.options, options); ! 598: SET_EBDA2(ebda_seg, dpte.reserved, 0); ! 599: SET_EBDA2(ebda_seg, dpte.revision, 0x11); ! 600: ! 601: u8 sum = checksum_far( ! 602: ebda_seg, (void*)offsetof(struct extended_bios_data_area_s, dpte), 15); ! 603: SET_EBDA2(ebda_seg, dpte.checksum, -sum); ! 604: ! 605: if (size < 66) { ! 606: disk_ret(regs, DISK_RET_SUCCESS); ! 607: return; ! 608: } ! 609: ! 610: // EDD 3.x ! 611: SET_INT13DPT(regs, key, 0xbedd); ! 612: SET_INT13DPT(regs, dpi_length, 36); ! 613: SET_INT13DPT(regs, reserved1, 0); ! 614: SET_INT13DPT(regs, reserved2, 0); ! 615: ! 616: int bdf = GET_GLOBAL(ATA_channels[channel].pci_bdf); ! 617: if (bdf != -1) { ! 618: SET_INT13DPT(regs, host_bus[0], 'P'); ! 619: SET_INT13DPT(regs, host_bus[1], 'C'); ! 620: SET_INT13DPT(regs, host_bus[2], 'I'); ! 621: SET_INT13DPT(regs, host_bus[3], 0); ! 622: ! 623: u32 path = (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8) ! 624: | (pci_bdf_to_fn(bdf) << 16)); ! 625: SET_INT13DPT(regs, iface_path, path); ! 626: } else { ! 627: // ISA ! 628: SET_INT13DPT(regs, host_bus[0], 'I'); ! 629: SET_INT13DPT(regs, host_bus[1], 'S'); ! 630: SET_INT13DPT(regs, host_bus[2], 'A'); ! 631: SET_INT13DPT(regs, host_bus[3], 0); ! 632: ! 633: SET_INT13DPT(regs, iface_path, iobase1); ! 634: } ! 635: ! 636: SET_INT13DPT(regs, iface_type[0], 'A'); ! 637: SET_INT13DPT(regs, iface_type[1], 'T'); ! 638: SET_INT13DPT(regs, iface_type[2], 'A'); ! 639: SET_INT13DPT(regs, iface_type[3], 0); ! 640: SET_INT13DPT(regs, iface_type[4], 0); ! 641: SET_INT13DPT(regs, iface_type[5], 0); ! 642: SET_INT13DPT(regs, iface_type[6], 0); ! 643: SET_INT13DPT(regs, iface_type[7], 0); ! 644: ! 645: SET_INT13DPT(regs, device_path, slave); ! 646: ! 647: SET_INT13DPT(regs, checksum ! 648: , -checksum_far(regs->ds, (void*)(regs->si+30), 35)); ! 649: ! 650: disk_ret(regs, DISK_RET_SUCCESS); ! 651: } ! 652: ! 653: // IBM/MS extended media change ! 654: static void ! 655: disk_1349(struct bregs *regs, struct drive_s *drive_g) ! 656: { ! 657: if (regs->dl < EXTSTART_CD) { ! 658: // Always success for HD ! 659: disk_ret(regs, DISK_RET_SUCCESS); ! 660: return; ! 661: } ! 662: set_invalid(regs); ! 663: // always send changed ?? ! 664: regs->ah = DISK_RET_ECHANGED; ! 665: } ! 666: ! 667: static void ! 668: disk_134e01(struct bregs *regs, struct drive_s *drive_g) ! 669: { ! 670: disk_ret(regs, DISK_RET_SUCCESS); ! 671: } ! 672: ! 673: static void ! 674: disk_134e03(struct bregs *regs, struct drive_s *drive_g) ! 675: { ! 676: disk_ret(regs, DISK_RET_SUCCESS); ! 677: } ! 678: ! 679: static void ! 680: disk_134e04(struct bregs *regs, struct drive_s *drive_g) ! 681: { ! 682: disk_ret(regs, DISK_RET_SUCCESS); ! 683: } ! 684: ! 685: static void ! 686: disk_134e06(struct bregs *regs, struct drive_s *drive_g) ! 687: { ! 688: disk_ret(regs, DISK_RET_SUCCESS); ! 689: } ! 690: ! 691: static void ! 692: disk_134eXX(struct bregs *regs, struct drive_s *drive_g) ! 693: { ! 694: disk_ret(regs, DISK_RET_EPARAM); ! 695: } ! 696: ! 697: // IBM/MS set hardware configuration ! 698: static void ! 699: disk_134e(struct bregs *regs, struct drive_s *drive_g) ! 700: { ! 701: switch (regs->al) { ! 702: case 0x01: disk_134e01(regs, drive_g); break; ! 703: case 0x03: disk_134e03(regs, drive_g); break; ! 704: case 0x04: disk_134e04(regs, drive_g); break; ! 705: case 0x06: disk_134e06(regs, drive_g); break; ! 706: default: disk_134eXX(regs, drive_g); break; ! 707: } ! 708: } ! 709: ! 710: static void ! 711: disk_13XX(struct bregs *regs, struct drive_s *drive_g) ! 712: { ! 713: disk_ret_unimplemented(regs, DISK_RET_EPARAM); ! 714: } ! 715: ! 716: static void ! 717: disk_13(struct bregs *regs, struct drive_s *drive_g) ! 718: { ! 719: //debug_stub(regs); ! 720: ! 721: // clear completion flag ! 722: SET_BDA(disk_interrupt_flag, 0); ! 723: ! 724: switch (regs->ah) { ! 725: case 0x00: disk_1300(regs, drive_g); break; ! 726: case 0x01: disk_1301(regs, drive_g); break; ! 727: case 0x02: disk_1302(regs, drive_g); break; ! 728: case 0x03: disk_1303(regs, drive_g); break; ! 729: case 0x04: disk_1304(regs, drive_g); break; ! 730: case 0x05: disk_1305(regs, drive_g); break; ! 731: case 0x08: disk_1308(regs, drive_g); break; ! 732: case 0x09: disk_1309(regs, drive_g); break; ! 733: case 0x0c: disk_130c(regs, drive_g); break; ! 734: case 0x0d: disk_130d(regs, drive_g); break; ! 735: case 0x10: disk_1310(regs, drive_g); break; ! 736: case 0x11: disk_1311(regs, drive_g); break; ! 737: case 0x14: disk_1314(regs, drive_g); break; ! 738: case 0x15: disk_1315(regs, drive_g); break; ! 739: case 0x16: disk_1316(regs, drive_g); break; ! 740: case 0x41: disk_1341(regs, drive_g); break; ! 741: case 0x42: disk_1342(regs, drive_g); break; ! 742: case 0x43: disk_1343(regs, drive_g); break; ! 743: case 0x44: disk_1344(regs, drive_g); break; ! 744: case 0x45: disk_1345(regs, drive_g); break; ! 745: case 0x46: disk_1346(regs, drive_g); break; ! 746: case 0x47: disk_1347(regs, drive_g); break; ! 747: case 0x48: disk_1348(regs, drive_g); break; ! 748: case 0x49: disk_1349(regs, drive_g); break; ! 749: case 0x4e: disk_134e(regs, drive_g); break; ! 750: default: disk_13XX(regs, drive_g); break; ! 751: } ! 752: } ! 753: ! 754: static void ! 755: floppy_13(struct bregs *regs, struct drive_s *drive_g) ! 756: { ! 757: // Only limited commands are supported on floppies. ! 758: switch (regs->ah) { ! 759: case 0x00: ! 760: case 0x01: ! 761: case 0x02: ! 762: case 0x03: ! 763: case 0x04: ! 764: case 0x05: ! 765: case 0x08: ! 766: case 0x15: ! 767: case 0x16: ! 768: disk_13(regs, drive_g); ! 769: break; ! 770: default: disk_13XX(regs, drive_g); break; ! 771: } ! 772: } ! 773: ! 774: ! 775: /**************************************************************** ! 776: * Entry points ! 777: ****************************************************************/ ! 778: ! 779: static void ! 780: handle_legacy_disk(struct bregs *regs, u8 extdrive) ! 781: { ! 782: if (! CONFIG_DRIVES) { ! 783: // XXX - support handle_1301 anyway? ! 784: disk_ret(regs, DISK_RET_EPARAM); ! 785: return; ! 786: } ! 787: ! 788: if (extdrive < EXTSTART_HD) { ! 789: struct drive_s *drive_g = getDrive(EXTTYPE_FLOPPY, extdrive); ! 790: if (!drive_g) ! 791: goto fail; ! 792: floppy_13(regs, drive_g); ! 793: return; ! 794: } ! 795: ! 796: struct drive_s *drive_g; ! 797: if (extdrive >= EXTSTART_CD) ! 798: drive_g = getDrive(EXTTYPE_CD, extdrive - EXTSTART_CD); ! 799: else ! 800: drive_g = getDrive(EXTTYPE_HD, extdrive - EXTSTART_HD); ! 801: if (!drive_g) ! 802: goto fail; ! 803: disk_13(regs, drive_g); ! 804: return; ! 805: ! 806: fail: ! 807: // XXX - support 1301/1308/1315 anyway? ! 808: disk_ret(regs, DISK_RET_EPARAM); ! 809: } ! 810: ! 811: void VISIBLE16 ! 812: handle_40(struct bregs *regs) ! 813: { ! 814: debug_enter(regs, DEBUG_HDL_40); ! 815: handle_legacy_disk(regs, regs->dl); ! 816: } ! 817: ! 818: // INT 13h Fixed Disk Services Entry Point ! 819: void VISIBLE16 ! 820: handle_13(struct bregs *regs) ! 821: { ! 822: debug_enter(regs, DEBUG_HDL_13); ! 823: u8 extdrive = regs->dl; ! 824: ! 825: if (CONFIG_CDROM_EMU) { ! 826: if (regs->ah == 0x4b) { ! 827: cdemu_134b(regs); ! 828: return; ! 829: } ! 830: u16 ebda_seg = get_ebda_seg(); ! 831: if (GET_EBDA2(ebda_seg, cdemu.active)) { ! 832: u8 emudrive = GET_EBDA2(ebda_seg, cdemu.emulated_extdrive); ! 833: if (extdrive == emudrive) { ! 834: // Access to an emulated drive. ! 835: struct drive_s *cdemu = GET_GLOBAL(cdemu_drive); ! 836: if (regs->ah > 0x16) { ! 837: // Only old-style commands supported. ! 838: disk_13XX(regs, cdemu); ! 839: return; ! 840: } ! 841: disk_13(regs, cdemu); ! 842: return; ! 843: } ! 844: if (extdrive < EXTSTART_CD && ((emudrive ^ extdrive) & 0x80) == 0) ! 845: // Adjust id to make room for emulated drive. ! 846: extdrive--; ! 847: } ! 848: } ! 849: handle_legacy_disk(regs, extdrive); ! 850: } ! 851: ! 852: // record completion in BIOS task complete flag ! 853: void VISIBLE16 ! 854: handle_76() ! 855: { ! 856: debug_isr(DEBUG_ISR_76); ! 857: SET_BDA(disk_interrupt_flag, 0xff); ! 858: eoi_pic2(); ! 859: } ! 860: ! 861: // Old Fixed Disk Parameter Table (newer tables are in the ebda). ! 862: struct fdpt_s OldFDPT VAR16FIXED(0xe401);
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