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 "ata.h" // ATA_*
13 #include "pic.h" // eoi_pic2
14 #include "bregs.h" // struct bregs
15 #include "pci.h" // pci_bdf_to_bus
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 basic_access(struct bregs *regs, u8 device, u16 command)
45 u8 type = GET_GLOBAL(ATA.devices[device].type);
47 if (type == ATA_TYPE_ATA) {
48 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
49 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
50 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
52 // Must be cd emulation.
53 u16 ebda_seg = get_ebda_seg();
54 nlc = GET_EBDA2(ebda_seg, cdemu.cylinders);
55 nlh = GET_EBDA2(ebda_seg, cdemu.heads);
56 nlspt = GET_EBDA2(ebda_seg, cdemu.spt);
60 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
61 u16 sector = regs->cl & 0x3f;
64 if (count > 128 || count == 0 || sector == 0) {
65 dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n"
67 disk_ret(regs, DISK_RET_EPARAM);
71 // sanity check on cyl heads, sec
72 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
73 dprintf(1, "int13_harddisk: function %02x, parameters out of"
74 " range %04x/%04x/%04x!\n"
75 , regs->ah, cylinder, head, sector);
76 disk_ret(regs, DISK_RET_EPARAM);
82 disk_ret(regs, DISK_RET_SUCCESS);
86 // translate lchs to lba
87 u32 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
90 u16 segment = regs->es;
91 u16 offset = regs->bx;
92 void *far_buffer = MAKE_FARPTR(segment, offset);
97 if (type == ATA_TYPE_ATA)
98 status = ata_cmd_data(device, command, lba, count, far_buffer);
100 status = cdrom_read_emu(device, lba, count, far_buffer);
104 // Set nb of sector transferred
105 regs->al = GET_EBDA(sector_count);
108 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
110 disk_ret(regs, DISK_RET_EBADTRACK);
112 disk_ret(regs, DISK_RET_SUCCESS);
116 extended_access(struct bregs *regs, u8 device, u16 command)
118 // Get lba and check.
119 u64 lba = GET_INT13EXT(regs, lba);
120 u8 type = GET_GLOBAL(ATA.devices[device].type);
121 if (type == ATA_TYPE_ATA
122 && lba >= GET_GLOBAL(ATA.devices[device].sectors)) {
123 dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
125 disk_ret(regs, DISK_RET_EPARAM);
131 disk_ret(regs, DISK_RET_SUCCESS);
135 u16 segment = GET_INT13EXT(regs, segment);
136 u16 offset = GET_INT13EXT(regs, offset);
137 void *far_buffer = MAKE_FARPTR(segment, offset);
138 u16 count = GET_INT13EXT(regs, count);
140 dprintf(DEBUG_HDL_13, "extacc lba=%d buf=%p count=%d\n"
141 , (u32)lba, far_buffer, count);
146 if (type == ATA_TYPE_ATA)
147 status = ata_cmd_data(device, command, lba, count, far_buffer);
149 status = cdrom_read(device, lba, count, far_buffer);
153 SET_INT13EXT(regs, count, GET_EBDA(sector_count));
156 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
158 disk_ret(regs, DISK_RET_EBADTRACK);
161 disk_ret(regs, DISK_RET_SUCCESS);
165 /****************************************************************
166 * Hard Drive functions
167 ****************************************************************/
169 // disk controller reset
171 disk_1300(struct bregs *regs, u8 device)
178 disk_1301(struct bregs *regs, u8 device)
180 u8 v = GET_BDA(disk_last_status);
183 // XXX - clear disk_last_status?
188 disk_1302(struct bregs *regs, u8 device)
190 basic_access(regs, device, ATA_CMD_READ_SECTORS);
193 // write disk sectors
195 disk_1303(struct bregs *regs, u8 device)
197 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
200 // verify disk sectors
202 disk_1304(struct bregs *regs, u8 device)
204 basic_access(regs, device, 0);
210 disk_1305(struct bregs *regs, u8 device)
215 // read disk drive parameters
217 disk_1308(struct bregs *regs, u8 device)
219 // Get logical geometry from table
220 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
221 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
222 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
223 u16 count = GET_BDA(hdcount);
225 nlc = nlc - 2; /* 0 based , last sector not used */
227 regs->ch = nlc & 0xff;
228 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
230 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
232 // FIXME should set ES & DI
233 disk_ret(regs, DISK_RET_SUCCESS);
236 // initialize drive parameters
238 disk_1309(struct bregs *regs, u8 device)
243 // seek to specified cylinder
245 disk_130c(struct bregs *regs, u8 device)
250 // alternate disk reset
252 disk_130d(struct bregs *regs, u8 device)
259 disk_1310(struct bregs *regs, u8 device)
261 // should look at 40:8E also???
263 // Read the status from controller
264 u8 status = inb(GET_GLOBAL(ATA.channels[device/2].iobase1) + ATA_CB_STAT);
265 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
266 disk_ret(regs, DISK_RET_SUCCESS);
268 disk_ret(regs, DISK_RET_ENOTREADY);
273 disk_1311(struct bregs *regs, u8 device)
278 // controller internal diagnostic
280 disk_1314(struct bregs *regs, u8 device)
285 // read disk drive size
287 disk_1315(struct bregs *regs, u8 device)
289 // Get logical geometry from table
290 u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
291 u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
292 u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
294 // Compute sector count seen by int13
295 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
296 regs->cx = lba >> 16;
297 regs->dx = lba & 0xffff;
299 disk_ret(regs, DISK_RET_SUCCESS);
300 regs->ah = 3; // hard disk accessible
303 // IBM/MS installation check
305 disk_1341(struct bregs *regs, u8 device)
307 regs->bx = 0xaa55; // install check
308 regs->cx = 0x0007; // ext disk access and edd, removable supported
309 disk_ret(regs, DISK_RET_SUCCESS);
310 regs->ah = 0x30; // EDD 3.0
313 // IBM/MS extended read
315 disk_1342(struct bregs *regs, u8 device)
317 extended_access(regs, device, ATA_CMD_READ_SECTORS);
320 // IBM/MS extended write
322 disk_1343(struct bregs *regs, u8 device)
324 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
329 disk_1344(struct bregs *regs, u8 device)
331 extended_access(regs, device, 0);
334 // IBM/MS lock/unlock drive
336 disk_1345(struct bregs *regs, u8 device)
338 // Always success for HD
339 disk_ret(regs, DISK_RET_SUCCESS);
342 // IBM/MS eject media
344 disk_1346(struct bregs *regs, u8 device)
346 // Volume Not Removable
347 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
350 // IBM/MS extended seek
352 disk_1347(struct bregs *regs, u8 device)
354 extended_access(regs, device, 0);
357 // IBM/MS get drive parameters
359 disk_1348(struct bregs *regs, u8 device)
361 u16 size = GET_INT13DPT(regs, size);
363 // Buffer is too small
365 disk_ret(regs, DISK_RET_EPARAM);
371 u8 type = GET_GLOBAL(ATA.devices[device].type);
372 u16 npc = GET_GLOBAL(ATA.devices[device].pchs.cylinders);
373 u16 nph = GET_GLOBAL(ATA.devices[device].pchs.heads);
374 u16 npspt = GET_GLOBAL(ATA.devices[device].pchs.spt);
375 u64 lba = GET_GLOBAL(ATA.devices[device].sectors);
376 u16 blksize = GET_GLOBAL(ATA.devices[device].blksize);
378 dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n"
379 , size, type, npc, nph, npspt, (u32)lba, blksize);
381 SET_INT13DPT(regs, size, 26);
382 if (type == ATA_TYPE_ATA) {
383 if (lba > (u64)npspt*nph*0x3fff) {
384 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
385 SET_INT13DPT(regs, cylinders, 0x3fff);
387 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
388 SET_INT13DPT(regs, cylinders, (u32)npc);
390 SET_INT13DPT(regs, heads, (u32)nph);
391 SET_INT13DPT(regs, spt, (u32)npspt);
392 SET_INT13DPT(regs, sector_count, lba);
395 // 0x74 = removable, media change, lockable, max values
396 SET_INT13DPT(regs, infos, 0x74);
397 SET_INT13DPT(regs, cylinders, 0xffffffff);
398 SET_INT13DPT(regs, heads, 0xffffffff);
399 SET_INT13DPT(regs, spt, 0xffffffff);
400 SET_INT13DPT(regs, sector_count, (u64)-1);
402 SET_INT13DPT(regs, blksize, blksize);
405 disk_ret(regs, DISK_RET_SUCCESS);
411 u16 ebda_seg = get_ebda_seg();
412 SET_INT13DPT(regs, size, 30);
414 SET_INT13DPT(regs, dpte_segment, ebda_seg);
415 SET_INT13DPT(regs, dpte_offset
416 , offsetof(struct extended_bios_data_area_s, dpte));
419 u8 channel = device / 2;
420 u8 slave = device % 2;
421 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
422 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
423 u8 irq = GET_GLOBAL(ATA.channels[channel].irq);
424 u8 mode = GET_GLOBAL(ATA.devices[device].mode);
427 if (type == ATA_TYPE_ATA) {
428 u8 translation = GET_GLOBAL(ATA.devices[device].translation);
429 if (translation != ATA_TRANSLATION_NONE) {
430 options |= 1<<3; // CHS translation
431 if (translation == ATA_TRANSLATION_LBA)
433 if (translation == ATA_TRANSLATION_RECHS)
438 options |= 1<<5; // removable device
439 options |= 1<<6; // atapi device
441 options |= 1<<4; // lba translation
442 if (mode == ATA_MODE_PIO32)
445 SET_EBDA2(ebda_seg, dpte.iobase1, iobase1);
446 SET_EBDA2(ebda_seg, dpte.iobase2, iobase2 + ATA_CB_DC);
447 SET_EBDA2(ebda_seg, dpte.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
449 SET_EBDA2(ebda_seg, dpte.unused, 0xcb);
450 SET_EBDA2(ebda_seg, dpte.irq, irq);
451 SET_EBDA2(ebda_seg, dpte.blkcount, 1);
452 SET_EBDA2(ebda_seg, dpte.dma, 0);
453 SET_EBDA2(ebda_seg, dpte.pio, 0);
454 SET_EBDA2(ebda_seg, dpte.options, options);
455 SET_EBDA2(ebda_seg, dpte.reserved, 0);
456 SET_EBDA2(ebda_seg, dpte.revision, 0x11);
458 u8 *p = MAKE_FARPTR(ebda_seg
459 , offsetof(struct extended_bios_data_area_s, dpte));
460 SET_EBDA2(ebda_seg, dpte.checksum, -checksum(p, 15));
463 disk_ret(regs, DISK_RET_SUCCESS);
468 SET_INT13DPT(regs, key, 0xbedd);
469 SET_INT13DPT(regs, dpi_length, 36);
470 SET_INT13DPT(regs, reserved1, 0);
471 SET_INT13DPT(regs, reserved2, 0);
473 SET_INT13DPT(regs, host_bus[0], 'P');
474 SET_INT13DPT(regs, host_bus[1], 'C');
475 SET_INT13DPT(regs, host_bus[2], 'I');
476 SET_INT13DPT(regs, host_bus[3], 0);
478 u32 bdf = GET_GLOBAL(ATA.channels[channel].pci_bdf);
479 u32 path = (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8)
480 | (pci_bdf_to_fn(bdf) << 16));
481 SET_INT13DPT(regs, iface_path, path);
483 SET_INT13DPT(regs, iface_type[0], 'A');
484 SET_INT13DPT(regs, iface_type[1], 'T');
485 SET_INT13DPT(regs, iface_type[2], 'A');
486 SET_INT13DPT(regs, iface_type[3], 0);
487 SET_INT13DPT(regs, iface_type[4], 0);
488 SET_INT13DPT(regs, iface_type[5], 0);
489 SET_INT13DPT(regs, iface_type[6], 0);
490 SET_INT13DPT(regs, iface_type[7], 0);
492 SET_INT13DPT(regs, device_path, slave);
494 SET_INT13DPT(regs, checksum, -checksum(MAKE_FARPTR(regs->ds, 30), 35));
496 disk_ret(regs, DISK_RET_SUCCESS);
499 // IBM/MS extended media change
501 disk_1349(struct bregs *regs, u8 device)
503 // Always success for HD
504 disk_ret(regs, DISK_RET_SUCCESS);
508 disk_134e01(struct bregs *regs, u8 device)
510 disk_ret(regs, DISK_RET_SUCCESS);
514 disk_134e03(struct bregs *regs, u8 device)
516 disk_ret(regs, DISK_RET_SUCCESS);
520 disk_134e04(struct bregs *regs, u8 device)
522 disk_ret(regs, DISK_RET_SUCCESS);
526 disk_134e06(struct bregs *regs, u8 device)
528 disk_ret(regs, DISK_RET_SUCCESS);
532 disk_134eXX(struct bregs *regs, u8 device)
534 disk_ret(regs, DISK_RET_EPARAM);
537 // IBM/MS set hardware configuration
539 disk_134e(struct bregs *regs, u8 device)
542 case 0x01: disk_134e01(regs, device); break;
543 case 0x03: disk_134e03(regs, device); break;
544 case 0x04: disk_134e04(regs, device); break;
545 case 0x06: disk_134e06(regs, device); break;
546 default: disk_134eXX(regs, device); break;
551 disk_13XX(struct bregs *regs, u8 device)
553 disk_ret(regs, DISK_RET_EPARAM);
557 disk_13(struct bregs *regs, u8 device)
561 // clear completion flag
562 SET_BDA(disk_interrupt_flag, 0);
565 case 0x00: disk_1300(regs, device); break;
566 case 0x01: disk_1301(regs, device); break;
567 case 0x02: disk_1302(regs, device); break;
568 case 0x03: disk_1303(regs, device); break;
569 case 0x04: disk_1304(regs, device); break;
570 case 0x05: disk_1305(regs, device); break;
571 case 0x08: disk_1308(regs, device); break;
572 case 0x09: disk_1309(regs, device); break;
573 case 0x0c: disk_130c(regs, device); break;
574 case 0x0d: disk_130d(regs, device); break;
575 case 0x10: disk_1310(regs, device); break;
576 case 0x11: disk_1311(regs, device); break;
577 case 0x14: disk_1314(regs, device); break;
578 case 0x15: disk_1315(regs, device); break;
579 case 0x41: disk_1341(regs, device); break;
580 case 0x42: disk_1342(regs, device); break;
581 case 0x43: disk_1343(regs, device); break;
582 case 0x44: disk_1344(regs, device); break;
583 case 0x45: disk_1345(regs, device); break;
584 case 0x46: disk_1346(regs, device); break;
585 case 0x47: disk_1347(regs, device); break;
586 case 0x48: disk_1348(regs, device); break;
587 case 0x49: disk_1349(regs, device); break;
588 case 0x4e: disk_134e(regs, device); break;
589 default: disk_13XX(regs, device); break;
594 /****************************************************************
596 ****************************************************************/
599 get_device(struct bregs *regs, u8 iscd, u8 drive)
601 // basic check : device has to be defined
602 if (drive >= CONFIG_MAX_ATA_DEVICES) {
603 disk_ret(regs, DISK_RET_EPARAM);
604 return CONFIG_MAX_ATA_DEVICES;
607 // Get the ata channel
608 u8 device = GET_GLOBAL(ATA.idmap[iscd][drive]);
610 // basic check : device has to be valid
611 if (device >= CONFIG_MAX_ATA_DEVICES) {
612 disk_ret(regs, DISK_RET_EPARAM);
613 return CONFIG_MAX_ATA_DEVICES;
620 handle_legacy_disk(struct bregs *regs, u8 drive)
623 floppy_13(regs, drive);
628 // XXX - old code had other disk access method.
629 disk_ret(regs, DISK_RET_EPARAM);
634 u8 device = get_device(regs, 1, drive - 0xe0);
635 if (device >= CONFIG_MAX_ATA_DEVICES)
637 cdrom_13(regs, device);
641 u8 device = get_device(regs, 0, drive - 0x80);
642 if (device >= CONFIG_MAX_ATA_DEVICES)
644 disk_13(regs, device);
648 handle_40(struct bregs *regs)
650 debug_enter(regs, DEBUG_HDL_40);
651 handle_legacy_disk(regs, regs->dl);
654 // INT 13h Fixed Disk Services Entry Point
656 handle_13(struct bregs *regs)
658 debug_enter(regs, DEBUG_HDL_13);
661 if (CONFIG_CDROM_EMU) {
662 if (regs->ah == 0x4b) {
666 u16 ebda_seg = get_ebda_seg();
667 if (GET_EBDA2(ebda_seg, cdemu.active)) {
668 if (drive == GET_EBDA2(ebda_seg, cdemu.emulated_drive)) {
676 handle_legacy_disk(regs, drive);
679 // record completion in BIOS task complete flag
683 debug_isr(DEBUG_ISR_76);
684 SET_BDA(disk_interrupt_flag, 0xff);