1 // 16bit code to access hard drives.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
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 "atabits.h" // ATA_CB_STAT
18 /****************************************************************
20 ****************************************************************/
23 __disk_ret(struct bregs *regs, u32 linecode, const char *fname)
26 SET_BDA(disk_last_status, code);
28 __set_code_fail(regs, linecode, fname);
30 set_code_success(regs);
34 __disk_stub(struct bregs *regs, int lineno, const char *fname)
36 __debug_stub(regs, lineno, fname);
37 __disk_ret(regs, DISK_RET_SUCCESS | (lineno << 8), fname);
40 #define DISK_STUB(regs) \
41 __disk_stub((regs), __LINE__, __func__)
44 __send_disk_op(struct disk_op_s *op_p, u16 op_s)
47 memcpy_fl(MAKE_FLATPTR(GET_SEG(SS), &dop)
48 , MAKE_FLATPTR(op_s, op_p)
51 dprintf(DEBUG_HDL_13, "disk_op d=%d lba=%d buf=%p count=%d cmd=%d\n"
52 , dop.driveid, (u32)dop.lba, dop.buf_fl
53 , dop.count, dop.command);
58 if (dop.command == CMD_CDEMU_READ)
59 status = cdrom_read_512(&dop);
60 else if (dop.command == CMD_CDROM_READ)
61 status = cdrom_read(&dop);
63 status = ata_cmd_data(&dop);
71 send_disk_op(struct disk_op_s *op)
76 return stack_hop((u32)op, GET_SEG(SS), 0, __send_disk_op);
80 basic_access(struct bregs *regs, u8 device, u16 command)
85 u8 type = GET_GLOBAL(ATA.devices[device].type);
87 if (type == ATA_TYPE_ATA) {
88 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
89 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
90 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
91 dop.command = command;
93 // Must be cd emulation.
94 u16 ebda_seg = get_ebda_seg();
95 nlc = GET_EBDA2(ebda_seg, cdemu.cylinders);
96 nlh = GET_EBDA2(ebda_seg, cdemu.heads);
97 nlspt = GET_EBDA2(ebda_seg, cdemu.spt);
98 dop.lba = GET_EBDA2(ebda_seg, cdemu.ilba) * 4;
99 dop.command = CMD_CDEMU_READ;
102 dop.count = regs->al;
103 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
104 u16 sector = regs->cl & 0x3f;
107 if (dop.count > 128 || dop.count == 0 || sector == 0) {
108 dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n"
110 disk_ret(regs, DISK_RET_EPARAM);
114 // sanity check on cyl heads, sec
115 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
116 dprintf(1, "int13_harddisk: function %02x, parameters out of"
117 " range %04x/%04x/%04x!\n"
118 , regs->ah, cylinder, head, sector);
119 disk_ret(regs, DISK_RET_EPARAM);
125 disk_ret(regs, DISK_RET_SUCCESS);
129 // translate lchs to lba
130 dop.lba += (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
133 u16 segment = regs->es;
134 u16 offset = regs->bx;
135 dop.buf_fl = MAKE_FLATPTR(segment, offset);
137 int status = send_disk_op(&dop);
139 // Set nb of sector transferred
140 regs->al = GET_EBDA(sector_count);
143 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
145 disk_ret(regs, DISK_RET_EBADTRACK);
148 disk_ret(regs, DISK_RET_SUCCESS);
152 extended_access(struct bregs *regs, u8 device, u16 command)
154 struct disk_op_s dop;
155 // Get lba and check.
156 dop.lba = GET_INT13EXT(regs, lba);
157 dop.command = command;
158 dop.driveid = device;
159 u8 type = GET_GLOBAL(ATA.devices[device].type);
160 if (type == ATA_TYPE_ATA) {
161 if (dop.lba >= GET_GLOBAL(ATA.devices[device].sectors)) {
162 dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
164 disk_ret(regs, DISK_RET_EPARAM);
168 dop.command = CMD_CDROM_READ;
173 disk_ret(regs, DISK_RET_SUCCESS);
177 u16 segment = GET_INT13EXT(regs, segment);
178 u16 offset = GET_INT13EXT(regs, offset);
179 dop.buf_fl = MAKE_FLATPTR(segment, offset);
180 dop.count = GET_INT13EXT(regs, count);
182 int status = send_disk_op(&dop);
184 SET_INT13EXT(regs, count, GET_EBDA(sector_count));
187 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
189 disk_ret(regs, DISK_RET_EBADTRACK);
192 disk_ret(regs, DISK_RET_SUCCESS);
196 /****************************************************************
197 * Hard Drive functions
198 ****************************************************************/
200 // disk controller reset
202 disk_1300(struct bregs *regs, u8 device)
209 disk_1301(struct bregs *regs, u8 device)
211 u8 v = GET_BDA(disk_last_status);
214 // XXX - clear disk_last_status?
219 disk_1302(struct bregs *regs, u8 device)
221 basic_access(regs, device, ATA_CMD_READ_SECTORS);
224 // write disk sectors
226 disk_1303(struct bregs *regs, u8 device)
228 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
231 // verify disk sectors
233 disk_1304(struct bregs *regs, u8 device)
235 basic_access(regs, device, 0);
241 disk_1305(struct bregs *regs, u8 device)
246 // read disk drive parameters
248 disk_1308(struct bregs *regs, u8 device)
250 // Get logical geometry from table
251 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
252 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
253 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
254 u16 count = GET_BDA(hdcount);
256 nlc = nlc - 2; /* 0 based , last sector not used */
258 regs->ch = nlc & 0xff;
259 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
261 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
263 // FIXME should set ES & DI
264 disk_ret(regs, DISK_RET_SUCCESS);
267 // initialize drive parameters
269 disk_1309(struct bregs *regs, u8 device)
274 // seek to specified cylinder
276 disk_130c(struct bregs *regs, u8 device)
281 // alternate disk reset
283 disk_130d(struct bregs *regs, u8 device)
290 disk_1310(struct bregs *regs, u8 device)
292 // should look at 40:8E also???
294 // Read the status from controller
295 u8 status = inb(GET_GLOBAL(ATA.channels[device/2].iobase1) + ATA_CB_STAT);
296 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
297 disk_ret(regs, DISK_RET_SUCCESS);
299 disk_ret(regs, DISK_RET_ENOTREADY);
304 disk_1311(struct bregs *regs, u8 device)
309 // controller internal diagnostic
311 disk_1314(struct bregs *regs, u8 device)
316 // read disk drive size
318 disk_1315(struct bregs *regs, u8 device)
320 // Get logical geometry from table
321 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
322 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
323 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
325 // Compute sector count seen by int13
326 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
327 regs->cx = lba >> 16;
328 regs->dx = lba & 0xffff;
330 disk_ret(regs, DISK_RET_SUCCESS);
331 regs->ah = 3; // hard disk accessible
334 // IBM/MS installation check
336 disk_1341(struct bregs *regs, u8 device)
338 regs->bx = 0xaa55; // install check
339 regs->cx = 0x0007; // ext disk access and edd, removable supported
340 disk_ret(regs, DISK_RET_SUCCESS);
341 regs->ah = 0x30; // EDD 3.0
344 // IBM/MS extended read
346 disk_1342(struct bregs *regs, u8 device)
348 extended_access(regs, device, ATA_CMD_READ_SECTORS);
351 // IBM/MS extended write
353 disk_1343(struct bregs *regs, u8 device)
355 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
360 disk_1344(struct bregs *regs, u8 device)
362 extended_access(regs, device, 0);
365 // IBM/MS lock/unlock drive
367 disk_1345(struct bregs *regs, u8 device)
369 // Always success for HD
370 disk_ret(regs, DISK_RET_SUCCESS);
373 // IBM/MS eject media
375 disk_1346(struct bregs *regs, u8 device)
377 // Volume Not Removable
378 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
381 // IBM/MS extended seek
383 disk_1347(struct bregs *regs, u8 device)
385 extended_access(regs, device, 0);
388 // IBM/MS get drive parameters
390 disk_1348(struct bregs *regs, u8 device)
392 u16 size = GET_INT13DPT(regs, size);
394 // Buffer is too small
396 disk_ret(regs, DISK_RET_EPARAM);
402 u8 type = GET_GLOBAL(ATA.devices[device].type);
403 u16 npc = GET_GLOBAL(ATA.devices[device].pchs.cylinders);
404 u16 nph = GET_GLOBAL(ATA.devices[device].pchs.heads);
405 u16 npspt = GET_GLOBAL(ATA.devices[device].pchs.spt);
406 u64 lba = GET_GLOBAL(ATA.devices[device].sectors);
407 u16 blksize = GET_GLOBAL(ATA.devices[device].blksize);
409 dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n"
410 , size, type, npc, nph, npspt, (u32)lba, blksize);
412 SET_INT13DPT(regs, size, 26);
413 if (type == ATA_TYPE_ATA) {
414 if (lba > (u64)npspt*nph*0x3fff) {
415 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
416 SET_INT13DPT(regs, cylinders, 0x3fff);
418 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
419 SET_INT13DPT(regs, cylinders, (u32)npc);
421 SET_INT13DPT(regs, heads, (u32)nph);
422 SET_INT13DPT(regs, spt, (u32)npspt);
423 SET_INT13DPT(regs, sector_count, lba);
426 // 0x74 = removable, media change, lockable, max values
427 SET_INT13DPT(regs, infos, 0x74);
428 SET_INT13DPT(regs, cylinders, 0xffffffff);
429 SET_INT13DPT(regs, heads, 0xffffffff);
430 SET_INT13DPT(regs, spt, 0xffffffff);
431 SET_INT13DPT(regs, sector_count, (u64)-1);
433 SET_INT13DPT(regs, blksize, blksize);
436 disk_ret(regs, DISK_RET_SUCCESS);
442 u16 ebda_seg = get_ebda_seg();
443 SET_INT13DPT(regs, size, 30);
445 SET_INT13DPT(regs, dpte_segment, ebda_seg);
446 SET_INT13DPT(regs, dpte_offset
447 , offsetof(struct extended_bios_data_area_s, dpte));
450 u8 channel = device / 2;
451 u8 slave = device % 2;
452 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
453 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
454 u8 irq = GET_GLOBAL(ATA.channels[channel].irq);
455 u8 mode = GET_GLOBAL(ATA.devices[device].mode);
458 if (type == ATA_TYPE_ATA) {
459 u8 translation = GET_GLOBAL(ATA.devices[device].translation);
460 if (translation != ATA_TRANSLATION_NONE) {
461 options |= 1<<3; // CHS translation
462 if (translation == ATA_TRANSLATION_LBA)
464 if (translation == ATA_TRANSLATION_RECHS)
469 options |= 1<<5; // removable device
470 options |= 1<<6; // atapi device
472 options |= 1<<4; // lba translation
473 if (mode == ATA_MODE_PIO32)
476 SET_EBDA2(ebda_seg, dpte.iobase1, iobase1);
477 SET_EBDA2(ebda_seg, dpte.iobase2, iobase2 + ATA_CB_DC);
478 SET_EBDA2(ebda_seg, dpte.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
480 SET_EBDA2(ebda_seg, dpte.unused, 0xcb);
481 SET_EBDA2(ebda_seg, dpte.irq, irq);
482 SET_EBDA2(ebda_seg, dpte.blkcount, 1);
483 SET_EBDA2(ebda_seg, dpte.dma, 0);
484 SET_EBDA2(ebda_seg, dpte.pio, 0);
485 SET_EBDA2(ebda_seg, dpte.options, options);
486 SET_EBDA2(ebda_seg, dpte.reserved, 0);
487 SET_EBDA2(ebda_seg, dpte.revision, 0x11);
489 u8 *p = MAKE_FLATPTR(ebda_seg
490 , offsetof(struct extended_bios_data_area_s, dpte));
491 SET_EBDA2(ebda_seg, dpte.checksum, -checksum(p, 15));
494 disk_ret(regs, DISK_RET_SUCCESS);
499 SET_INT13DPT(regs, key, 0xbedd);
500 SET_INT13DPT(regs, dpi_length, 36);
501 SET_INT13DPT(regs, reserved1, 0);
502 SET_INT13DPT(regs, reserved2, 0);
504 SET_INT13DPT(regs, host_bus[0], 'P');
505 SET_INT13DPT(regs, host_bus[1], 'C');
506 SET_INT13DPT(regs, host_bus[2], 'I');
507 SET_INT13DPT(regs, host_bus[3], 0);
509 u32 bdf = GET_GLOBAL(ATA.channels[channel].pci_bdf);
510 u32 path = (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8)
511 | (pci_bdf_to_fn(bdf) << 16));
512 SET_INT13DPT(regs, iface_path, path);
514 SET_INT13DPT(regs, iface_type[0], 'A');
515 SET_INT13DPT(regs, iface_type[1], 'T');
516 SET_INT13DPT(regs, iface_type[2], 'A');
517 SET_INT13DPT(regs, iface_type[3], 0);
518 SET_INT13DPT(regs, iface_type[4], 0);
519 SET_INT13DPT(regs, iface_type[5], 0);
520 SET_INT13DPT(regs, iface_type[6], 0);
521 SET_INT13DPT(regs, iface_type[7], 0);
523 SET_INT13DPT(regs, device_path, slave);
525 SET_INT13DPT(regs, checksum, -checksum(MAKE_FLATPTR(regs->ds, 30), 35));
527 disk_ret(regs, DISK_RET_SUCCESS);
530 // IBM/MS extended media change
532 disk_1349(struct bregs *regs, u8 device)
534 // Always success for HD
535 disk_ret(regs, DISK_RET_SUCCESS);
539 disk_134e01(struct bregs *regs, u8 device)
541 disk_ret(regs, DISK_RET_SUCCESS);
545 disk_134e03(struct bregs *regs, u8 device)
547 disk_ret(regs, DISK_RET_SUCCESS);
551 disk_134e04(struct bregs *regs, u8 device)
553 disk_ret(regs, DISK_RET_SUCCESS);
557 disk_134e06(struct bregs *regs, u8 device)
559 disk_ret(regs, DISK_RET_SUCCESS);
563 disk_134eXX(struct bregs *regs, u8 device)
565 disk_ret(regs, DISK_RET_EPARAM);
568 // IBM/MS set hardware configuration
570 disk_134e(struct bregs *regs, u8 device)
573 case 0x01: disk_134e01(regs, device); break;
574 case 0x03: disk_134e03(regs, device); break;
575 case 0x04: disk_134e04(regs, device); break;
576 case 0x06: disk_134e06(regs, device); break;
577 default: disk_134eXX(regs, device); break;
582 disk_13XX(struct bregs *regs, u8 device)
584 disk_ret(regs, DISK_RET_EPARAM);
588 disk_13(struct bregs *regs, u8 device)
592 // clear completion flag
593 SET_BDA(disk_interrupt_flag, 0);
596 case 0x00: disk_1300(regs, device); break;
597 case 0x01: disk_1301(regs, device); break;
598 case 0x02: disk_1302(regs, device); break;
599 case 0x03: disk_1303(regs, device); break;
600 case 0x04: disk_1304(regs, device); break;
601 case 0x05: disk_1305(regs, device); break;
602 case 0x08: disk_1308(regs, device); break;
603 case 0x09: disk_1309(regs, device); break;
604 case 0x0c: disk_130c(regs, device); break;
605 case 0x0d: disk_130d(regs, device); break;
606 case 0x10: disk_1310(regs, device); break;
607 case 0x11: disk_1311(regs, device); break;
608 case 0x14: disk_1314(regs, device); break;
609 case 0x15: disk_1315(regs, device); break;
610 case 0x41: disk_1341(regs, device); break;
611 case 0x42: disk_1342(regs, device); break;
612 case 0x43: disk_1343(regs, device); break;
613 case 0x44: disk_1344(regs, device); break;
614 case 0x45: disk_1345(regs, device); break;
615 case 0x46: disk_1346(regs, device); break;
616 case 0x47: disk_1347(regs, device); break;
617 case 0x48: disk_1348(regs, device); break;
618 case 0x49: disk_1349(regs, device); break;
619 case 0x4e: disk_134e(regs, device); break;
620 default: disk_13XX(regs, device); break;
625 /****************************************************************
627 ****************************************************************/
630 get_device(struct bregs *regs, u8 iscd, u8 drive)
632 // basic check : device has to be defined
633 if (drive >= CONFIG_MAX_ATA_DEVICES) {
634 disk_ret(regs, DISK_RET_EPARAM);
635 return CONFIG_MAX_ATA_DEVICES;
638 // Get the ata channel
639 u8 device = GET_GLOBAL(ATA.idmap[iscd][drive]);
641 // basic check : device has to be valid
642 if (device >= CONFIG_MAX_ATA_DEVICES) {
643 disk_ret(regs, DISK_RET_EPARAM);
644 return CONFIG_MAX_ATA_DEVICES;
651 handle_legacy_disk(struct bregs *regs, u8 drive)
654 floppy_13(regs, drive);
659 // XXX - old code had other disk access method.
660 disk_ret(regs, DISK_RET_EPARAM);
665 u8 device = get_device(regs, 1, drive - 0xe0);
666 if (device >= CONFIG_MAX_ATA_DEVICES)
668 cdrom_13(regs, device);
672 u8 device = get_device(regs, 0, drive - 0x80);
673 if (device >= CONFIG_MAX_ATA_DEVICES)
675 disk_13(regs, device);
679 handle_40(struct bregs *regs)
681 debug_enter(regs, DEBUG_HDL_40);
682 handle_legacy_disk(regs, regs->dl);
685 // INT 13h Fixed Disk Services Entry Point
687 handle_13(struct bregs *regs)
689 debug_enter(regs, DEBUG_HDL_13);
692 if (CONFIG_CDROM_EMU) {
693 if (regs->ah == 0x4b) {
697 u16 ebda_seg = get_ebda_seg();
698 if (GET_EBDA2(ebda_seg, cdemu.active)) {
699 if (drive == GET_EBDA2(ebda_seg, cdemu.emulated_drive)) {
707 handle_legacy_disk(regs, drive);
710 // record completion in BIOS task complete flag
714 debug_isr(DEBUG_ISR_76);
715 SET_BDA(disk_interrupt_flag, 0xff);
719 // Old Fixed Disk Parameter Table (newer tables are in the ebda).
720 struct fdpt_s OldFDPT VAR16FIXED(0xe401);