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 GPLv3 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(const char *fname, int lineno, struct bregs *regs, u8 code)
25 SET_BDA(disk_last_status, code);
27 __set_code_fail(fname, lineno, regs, code);
29 set_code_success(regs);
33 __disk_stub(const char *fname, int lineno, struct bregs *regs)
35 __debug_stub(fname, lineno, regs);
36 __disk_ret(fname, lineno, regs, DISK_RET_SUCCESS);
39 #define DISK_STUB(regs) \
40 __disk_stub(__func__, __LINE__, (regs))
43 __send_disk_op(struct disk_op_s *op_p, u16 op_s)
46 memcpy_far(MAKE_FARPTR(GET_SEG(SS), &dop)
47 , MAKE_FARPTR(op_s, op_p)
50 dprintf(DEBUG_HDL_13, "disk_op d=%d lba=%d buf=%p count=%d cmd=%d\n"
51 , dop.driveid, (u32)dop.lba, dop.far_buffer
52 , dop.count, dop.command);
57 if (dop.command == CMD_CDEMU_READ)
58 status = cdrom_read_512(&dop);
59 else if (dop.command == CMD_CDROM_READ)
60 status = cdrom_read(&dop);
62 status = ata_cmd_data(&dop);
70 send_disk_op(struct disk_op_s *op)
72 return stack_hop((u32)op, GET_SEG(SS), 0, __send_disk_op);
76 basic_access(struct bregs *regs, u8 device, u16 command)
81 u8 type = GET_GLOBAL(ATA.devices[device].type);
83 if (type == ATA_TYPE_ATA) {
84 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
85 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
86 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
87 dop.command = command;
89 // Must be cd emulation.
90 u16 ebda_seg = get_ebda_seg();
91 nlc = GET_EBDA2(ebda_seg, cdemu.cylinders);
92 nlh = GET_EBDA2(ebda_seg, cdemu.heads);
93 nlspt = GET_EBDA2(ebda_seg, cdemu.spt);
94 dop.lba = GET_EBDA2(ebda_seg, cdemu.ilba) * 4;
95 dop.command = CMD_CDEMU_READ;
99 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
100 u16 sector = regs->cl & 0x3f;
103 if (dop.count > 128 || dop.count == 0 || sector == 0) {
104 dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n"
106 disk_ret(regs, DISK_RET_EPARAM);
110 // sanity check on cyl heads, sec
111 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
112 dprintf(1, "int13_harddisk: function %02x, parameters out of"
113 " range %04x/%04x/%04x!\n"
114 , regs->ah, cylinder, head, sector);
115 disk_ret(regs, DISK_RET_EPARAM);
121 disk_ret(regs, DISK_RET_SUCCESS);
125 // translate lchs to lba
126 dop.lba += (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
129 u16 segment = regs->es;
130 u16 offset = regs->bx;
131 dop.far_buffer = MAKE_FARPTR(segment, offset);
133 int status = send_disk_op(&dop);
135 // Set nb of sector transferred
136 regs->al = GET_EBDA(sector_count);
139 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
141 disk_ret(regs, DISK_RET_EBADTRACK);
143 disk_ret(regs, DISK_RET_SUCCESS);
147 extended_access(struct bregs *regs, u8 device, u16 command)
149 struct disk_op_s dop;
150 // Get lba and check.
151 dop.lba = GET_INT13EXT(regs, lba);
152 dop.command = command;
153 dop.driveid = device;
154 u8 type = GET_GLOBAL(ATA.devices[device].type);
155 if (type == ATA_TYPE_ATA) {
156 if (dop.lba >= GET_GLOBAL(ATA.devices[device].sectors)) {
157 dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
159 disk_ret(regs, DISK_RET_EPARAM);
163 dop.command = CMD_CDROM_READ;
168 disk_ret(regs, DISK_RET_SUCCESS);
172 u16 segment = GET_INT13EXT(regs, segment);
173 u16 offset = GET_INT13EXT(regs, offset);
174 dop.far_buffer = MAKE_FARPTR(segment, offset);
175 dop.count = GET_INT13EXT(regs, count);
177 int status = send_disk_op(&dop);
179 SET_INT13EXT(regs, count, GET_EBDA(sector_count));
182 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
184 disk_ret(regs, DISK_RET_EBADTRACK);
187 disk_ret(regs, DISK_RET_SUCCESS);
191 /****************************************************************
192 * Hard Drive functions
193 ****************************************************************/
195 // disk controller reset
197 disk_1300(struct bregs *regs, u8 device)
204 disk_1301(struct bregs *regs, u8 device)
206 u8 v = GET_BDA(disk_last_status);
209 // XXX - clear disk_last_status?
214 disk_1302(struct bregs *regs, u8 device)
216 basic_access(regs, device, ATA_CMD_READ_SECTORS);
219 // write disk sectors
221 disk_1303(struct bregs *regs, u8 device)
223 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
226 // verify disk sectors
228 disk_1304(struct bregs *regs, u8 device)
230 basic_access(regs, device, 0);
236 disk_1305(struct bregs *regs, u8 device)
241 // read disk drive parameters
243 disk_1308(struct bregs *regs, u8 device)
245 // Get logical geometry from table
246 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
247 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
248 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
249 u16 count = GET_BDA(hdcount);
251 nlc = nlc - 2; /* 0 based , last sector not used */
253 regs->ch = nlc & 0xff;
254 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
256 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
258 // FIXME should set ES & DI
259 disk_ret(regs, DISK_RET_SUCCESS);
262 // initialize drive parameters
264 disk_1309(struct bregs *regs, u8 device)
269 // seek to specified cylinder
271 disk_130c(struct bregs *regs, u8 device)
276 // alternate disk reset
278 disk_130d(struct bregs *regs, u8 device)
285 disk_1310(struct bregs *regs, u8 device)
287 // should look at 40:8E also???
289 // Read the status from controller
290 u8 status = inb(GET_GLOBAL(ATA.channels[device/2].iobase1) + ATA_CB_STAT);
291 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
292 disk_ret(regs, DISK_RET_SUCCESS);
294 disk_ret(regs, DISK_RET_ENOTREADY);
299 disk_1311(struct bregs *regs, u8 device)
304 // controller internal diagnostic
306 disk_1314(struct bregs *regs, u8 device)
311 // read disk drive size
313 disk_1315(struct bregs *regs, u8 device)
315 // Get logical geometry from table
316 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
317 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
318 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
320 // Compute sector count seen by int13
321 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
322 regs->cx = lba >> 16;
323 regs->dx = lba & 0xffff;
325 disk_ret(regs, DISK_RET_SUCCESS);
326 regs->ah = 3; // hard disk accessible
329 // IBM/MS installation check
331 disk_1341(struct bregs *regs, u8 device)
333 regs->bx = 0xaa55; // install check
334 regs->cx = 0x0007; // ext disk access and edd, removable supported
335 disk_ret(regs, DISK_RET_SUCCESS);
336 regs->ah = 0x30; // EDD 3.0
339 // IBM/MS extended read
341 disk_1342(struct bregs *regs, u8 device)
343 extended_access(regs, device, ATA_CMD_READ_SECTORS);
346 // IBM/MS extended write
348 disk_1343(struct bregs *regs, u8 device)
350 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
355 disk_1344(struct bregs *regs, u8 device)
357 extended_access(regs, device, 0);
360 // IBM/MS lock/unlock drive
362 disk_1345(struct bregs *regs, u8 device)
364 // Always success for HD
365 disk_ret(regs, DISK_RET_SUCCESS);
368 // IBM/MS eject media
370 disk_1346(struct bregs *regs, u8 device)
372 // Volume Not Removable
373 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
376 // IBM/MS extended seek
378 disk_1347(struct bregs *regs, u8 device)
380 extended_access(regs, device, 0);
383 // IBM/MS get drive parameters
385 disk_1348(struct bregs *regs, u8 device)
387 u16 size = GET_INT13DPT(regs, size);
389 // Buffer is too small
391 disk_ret(regs, DISK_RET_EPARAM);
397 u8 type = GET_GLOBAL(ATA.devices[device].type);
398 u16 npc = GET_GLOBAL(ATA.devices[device].pchs.cylinders);
399 u16 nph = GET_GLOBAL(ATA.devices[device].pchs.heads);
400 u16 npspt = GET_GLOBAL(ATA.devices[device].pchs.spt);
401 u64 lba = GET_GLOBAL(ATA.devices[device].sectors);
402 u16 blksize = GET_GLOBAL(ATA.devices[device].blksize);
404 dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n"
405 , size, type, npc, nph, npspt, (u32)lba, blksize);
407 SET_INT13DPT(regs, size, 26);
408 if (type == ATA_TYPE_ATA) {
409 if (lba > (u64)npspt*nph*0x3fff) {
410 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
411 SET_INT13DPT(regs, cylinders, 0x3fff);
413 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
414 SET_INT13DPT(regs, cylinders, (u32)npc);
416 SET_INT13DPT(regs, heads, (u32)nph);
417 SET_INT13DPT(regs, spt, (u32)npspt);
418 SET_INT13DPT(regs, sector_count, lba);
421 // 0x74 = removable, media change, lockable, max values
422 SET_INT13DPT(regs, infos, 0x74);
423 SET_INT13DPT(regs, cylinders, 0xffffffff);
424 SET_INT13DPT(regs, heads, 0xffffffff);
425 SET_INT13DPT(regs, spt, 0xffffffff);
426 SET_INT13DPT(regs, sector_count, (u64)-1);
428 SET_INT13DPT(regs, blksize, blksize);
431 disk_ret(regs, DISK_RET_SUCCESS);
437 u16 ebda_seg = get_ebda_seg();
438 SET_INT13DPT(regs, size, 30);
440 SET_INT13DPT(regs, dpte_segment, ebda_seg);
441 SET_INT13DPT(regs, dpte_offset
442 , offsetof(struct extended_bios_data_area_s, dpte));
445 u8 channel = device / 2;
446 u8 slave = device % 2;
447 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
448 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
449 u8 irq = GET_GLOBAL(ATA.channels[channel].irq);
450 u8 mode = GET_GLOBAL(ATA.devices[device].mode);
453 if (type == ATA_TYPE_ATA) {
454 u8 translation = GET_GLOBAL(ATA.devices[device].translation);
455 if (translation != ATA_TRANSLATION_NONE) {
456 options |= 1<<3; // CHS translation
457 if (translation == ATA_TRANSLATION_LBA)
459 if (translation == ATA_TRANSLATION_RECHS)
464 options |= 1<<5; // removable device
465 options |= 1<<6; // atapi device
467 options |= 1<<4; // lba translation
468 if (mode == ATA_MODE_PIO32)
471 SET_EBDA2(ebda_seg, dpte.iobase1, iobase1);
472 SET_EBDA2(ebda_seg, dpte.iobase2, iobase2 + ATA_CB_DC);
473 SET_EBDA2(ebda_seg, dpte.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
475 SET_EBDA2(ebda_seg, dpte.unused, 0xcb);
476 SET_EBDA2(ebda_seg, dpte.irq, irq);
477 SET_EBDA2(ebda_seg, dpte.blkcount, 1);
478 SET_EBDA2(ebda_seg, dpte.dma, 0);
479 SET_EBDA2(ebda_seg, dpte.pio, 0);
480 SET_EBDA2(ebda_seg, dpte.options, options);
481 SET_EBDA2(ebda_seg, dpte.reserved, 0);
482 SET_EBDA2(ebda_seg, dpte.revision, 0x11);
484 u8 *p = MAKE_FARPTR(ebda_seg
485 , offsetof(struct extended_bios_data_area_s, dpte));
486 SET_EBDA2(ebda_seg, dpte.checksum, -checksum(p, 15));
489 disk_ret(regs, DISK_RET_SUCCESS);
494 SET_INT13DPT(regs, key, 0xbedd);
495 SET_INT13DPT(regs, dpi_length, 36);
496 SET_INT13DPT(regs, reserved1, 0);
497 SET_INT13DPT(regs, reserved2, 0);
499 SET_INT13DPT(regs, host_bus[0], 'P');
500 SET_INT13DPT(regs, host_bus[1], 'C');
501 SET_INT13DPT(regs, host_bus[2], 'I');
502 SET_INT13DPT(regs, host_bus[3], 0);
504 u32 bdf = GET_GLOBAL(ATA.channels[channel].pci_bdf);
505 u32 path = (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8)
506 | (pci_bdf_to_fn(bdf) << 16));
507 SET_INT13DPT(regs, iface_path, path);
509 SET_INT13DPT(regs, iface_type[0], 'A');
510 SET_INT13DPT(regs, iface_type[1], 'T');
511 SET_INT13DPT(regs, iface_type[2], 'A');
512 SET_INT13DPT(regs, iface_type[3], 0);
513 SET_INT13DPT(regs, iface_type[4], 0);
514 SET_INT13DPT(regs, iface_type[5], 0);
515 SET_INT13DPT(regs, iface_type[6], 0);
516 SET_INT13DPT(regs, iface_type[7], 0);
518 SET_INT13DPT(regs, device_path, slave);
520 SET_INT13DPT(regs, checksum, -checksum(MAKE_FARPTR(regs->ds, 30), 35));
522 disk_ret(regs, DISK_RET_SUCCESS);
525 // IBM/MS extended media change
527 disk_1349(struct bregs *regs, u8 device)
529 // Always success for HD
530 disk_ret(regs, DISK_RET_SUCCESS);
534 disk_134e01(struct bregs *regs, u8 device)
536 disk_ret(regs, DISK_RET_SUCCESS);
540 disk_134e03(struct bregs *regs, u8 device)
542 disk_ret(regs, DISK_RET_SUCCESS);
546 disk_134e04(struct bregs *regs, u8 device)
548 disk_ret(regs, DISK_RET_SUCCESS);
552 disk_134e06(struct bregs *regs, u8 device)
554 disk_ret(regs, DISK_RET_SUCCESS);
558 disk_134eXX(struct bregs *regs, u8 device)
560 disk_ret(regs, DISK_RET_EPARAM);
563 // IBM/MS set hardware configuration
565 disk_134e(struct bregs *regs, u8 device)
568 case 0x01: disk_134e01(regs, device); break;
569 case 0x03: disk_134e03(regs, device); break;
570 case 0x04: disk_134e04(regs, device); break;
571 case 0x06: disk_134e06(regs, device); break;
572 default: disk_134eXX(regs, device); break;
577 disk_13XX(struct bregs *regs, u8 device)
579 disk_ret(regs, DISK_RET_EPARAM);
583 disk_13(struct bregs *regs, u8 device)
587 // clear completion flag
588 SET_BDA(disk_interrupt_flag, 0);
591 case 0x00: disk_1300(regs, device); break;
592 case 0x01: disk_1301(regs, device); break;
593 case 0x02: disk_1302(regs, device); break;
594 case 0x03: disk_1303(regs, device); break;
595 case 0x04: disk_1304(regs, device); break;
596 case 0x05: disk_1305(regs, device); break;
597 case 0x08: disk_1308(regs, device); break;
598 case 0x09: disk_1309(regs, device); break;
599 case 0x0c: disk_130c(regs, device); break;
600 case 0x0d: disk_130d(regs, device); break;
601 case 0x10: disk_1310(regs, device); break;
602 case 0x11: disk_1311(regs, device); break;
603 case 0x14: disk_1314(regs, device); break;
604 case 0x15: disk_1315(regs, device); break;
605 case 0x41: disk_1341(regs, device); break;
606 case 0x42: disk_1342(regs, device); break;
607 case 0x43: disk_1343(regs, device); break;
608 case 0x44: disk_1344(regs, device); break;
609 case 0x45: disk_1345(regs, device); break;
610 case 0x46: disk_1346(regs, device); break;
611 case 0x47: disk_1347(regs, device); break;
612 case 0x48: disk_1348(regs, device); break;
613 case 0x49: disk_1349(regs, device); break;
614 case 0x4e: disk_134e(regs, device); break;
615 default: disk_13XX(regs, device); break;
620 /****************************************************************
622 ****************************************************************/
625 get_device(struct bregs *regs, u8 iscd, u8 drive)
627 // basic check : device has to be defined
628 if (drive >= CONFIG_MAX_ATA_DEVICES) {
629 disk_ret(regs, DISK_RET_EPARAM);
630 return CONFIG_MAX_ATA_DEVICES;
633 // Get the ata channel
634 u8 device = GET_GLOBAL(ATA.idmap[iscd][drive]);
636 // basic check : device has to be valid
637 if (device >= CONFIG_MAX_ATA_DEVICES) {
638 disk_ret(regs, DISK_RET_EPARAM);
639 return CONFIG_MAX_ATA_DEVICES;
646 handle_legacy_disk(struct bregs *regs, u8 drive)
649 floppy_13(regs, drive);
654 // XXX - old code had other disk access method.
655 disk_ret(regs, DISK_RET_EPARAM);
660 u8 device = get_device(regs, 1, drive - 0xe0);
661 if (device >= CONFIG_MAX_ATA_DEVICES)
663 cdrom_13(regs, device);
667 u8 device = get_device(regs, 0, drive - 0x80);
668 if (device >= CONFIG_MAX_ATA_DEVICES)
670 disk_13(regs, device);
674 handle_40(struct bregs *regs)
676 debug_enter(regs, DEBUG_HDL_40);
677 handle_legacy_disk(regs, regs->dl);
680 // INT 13h Fixed Disk Services Entry Point
682 handle_13(struct bregs *regs)
684 debug_enter(regs, DEBUG_HDL_13);
687 if (CONFIG_CDROM_EMU) {
688 if (regs->ah == 0x4b) {
692 u16 ebda_seg = get_ebda_seg();
693 if (GET_EBDA2(ebda_seg, cdemu.active)) {
694 if (drive == GET_EBDA2(ebda_seg, cdemu.emulated_drive)) {
702 handle_legacy_disk(regs, drive);
705 // record completion in BIOS task complete flag
709 debug_isr(DEBUG_ISR_76);
710 SET_BDA(disk_interrupt_flag, 0xff);