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" // struct bregs
10 #include "config.h" // CONFIG_*
11 #include "cmos.h" // inb_cmos
12 #include "util.h" // debug_enter
13 #include "ata.h" // ATA_*
15 #define DEBUGF1(fmt, args...) bprintf(0, fmt , ##args)
16 #define DEBUGF(fmt, args...)
19 /****************************************************************
21 ****************************************************************/
23 #define DISK_STUB(regs) do { \
24 struct bregs *__regs = (regs); \
26 disk_ret(__regs, DISK_RET_SUCCESS); \
30 basic_access(struct bregs *regs, u8 device, u16 command)
32 u8 type = GET_EBDA(ata.devices[device].type);
34 if (type == ATA_TYPE_ATA) {
35 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
36 nlh = GET_EBDA(ata.devices[device].lchs.heads);
37 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
39 // Must be cd emulation.
40 nlc = GET_EBDA(cdemu.vdevice.cylinders);
41 nlh = GET_EBDA(cdemu.vdevice.heads);
42 nlspt = GET_EBDA(cdemu.vdevice.spt);
46 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
47 u16 sector = regs->cl & 0x3f;
50 if (count > 128 || count == 0 || sector == 0) {
51 BX_INFO("int13_harddisk: function %02x, parameter out of range!\n"
53 disk_ret(regs, DISK_RET_EPARAM);
57 // sanity check on cyl heads, sec
58 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
59 BX_INFO("int13_harddisk: function %02x, parameters out of"
60 " range %04x/%04x/%04x!\n"
61 , regs->ah, cylinder, head, sector);
62 disk_ret(regs, DISK_RET_EPARAM);
68 disk_ret(regs, DISK_RET_SUCCESS);
72 // translate lchs to lba
73 u32 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
76 u16 segment = regs->es;
77 u16 offset = regs->bx;
78 void *far_buffer = MAKE_FARPTR(segment, offset);
83 if (type == ATA_TYPE_ATA)
84 status = ata_cmd_data(device, command, lba, count, far_buffer);
86 status = cdrom_read_emu(device, lba, count, far_buffer);
90 // Set nb of sector transferred
91 regs->al = GET_EBDA(ata.trsfsectors);
94 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
96 disk_ret(regs, DISK_RET_EBADTRACK);
98 disk_ret(regs, DISK_RET_SUCCESS);
102 extended_access(struct bregs *regs, u8 device, u16 command)
104 u16 count = GET_INT13EXT(regs, count);
106 // Can't use 64 bits lba
107 u32 lba = GET_INT13EXT(regs, lba2);
109 BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n"
111 disk_ret(regs, DISK_RET_EPARAM);
115 u8 type = GET_EBDA(ata.devices[device].type);
117 // Get 32 bits lba and check
118 lba = GET_INT13EXT(regs, lba1);
119 if (type == ATA_TYPE_ATA
120 && lba >= GET_EBDA(ata.devices[device].sectors)) {
121 BX_INFO("int13_harddisk: function %02x. LBA out of range\n", regs->ah);
122 disk_ret(regs, DISK_RET_EPARAM);
128 disk_ret(regs, DISK_RET_SUCCESS);
132 u16 segment = GET_INT13EXT(regs, segment);
133 u16 offset = GET_INT13EXT(regs, offset);
134 void *far_buffer = MAKE_FARPTR(segment, offset);
139 if (type == ATA_TYPE_ATA)
140 status = ata_cmd_data(device, command, lba, count, far_buffer);
142 status = cdrom_read(device, lba, count, far_buffer);
146 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
149 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
151 disk_ret(regs, DISK_RET_EBADTRACK);
154 disk_ret(regs, DISK_RET_SUCCESS);
158 /****************************************************************
159 * Hard Drive functions
160 ****************************************************************/
162 // disk controller reset
164 disk_1300(struct bregs *regs, u8 device)
171 disk_1301(struct bregs *regs, u8 device)
173 u8 v = GET_BDA(disk_last_status);
176 // XXX - clear disk_last_status?
181 disk_1302(struct bregs *regs, u8 device)
183 basic_access(regs, device, ATA_CMD_READ_SECTORS);
186 // write disk sectors
188 disk_1303(struct bregs *regs, u8 device)
190 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
193 // verify disk sectors
195 disk_1304(struct bregs *regs, u8 device)
197 basic_access(regs, device, 0);
203 disk_1305(struct bregs *regs, u8 device)
208 // read disk drive parameters
210 disk_1308(struct bregs *regs, u8 device)
212 // Get logical geometry from table
213 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
214 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
215 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
216 u16 count = GET_EBDA(ata.hdcount);
218 nlc = nlc - 2; /* 0 based , last sector not used */
220 regs->ch = nlc & 0xff;
221 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
223 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
225 // FIXME should set ES & DI
226 disk_ret(regs, DISK_RET_SUCCESS);
229 // initialize drive parameters
231 disk_1309(struct bregs *regs, u8 device)
236 // seek to specified cylinder
238 disk_130c(struct bregs *regs, u8 device)
243 // alternate disk reset
245 disk_130d(struct bregs *regs, u8 device)
252 disk_1310(struct bregs *regs, u8 device)
254 // should look at 40:8E also???
256 // Read the status from controller
257 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
258 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
259 disk_ret(regs, DISK_RET_SUCCESS);
261 disk_ret(regs, DISK_RET_ENOTREADY);
266 disk_1311(struct bregs *regs, u8 device)
271 // controller internal diagnostic
273 disk_1314(struct bregs *regs, u8 device)
278 // read disk drive size
280 disk_1315(struct bregs *regs, u8 device)
282 // Get logical geometry from table
283 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
284 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
285 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
287 // Compute sector count seen by int13
288 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
289 regs->cx = lba >> 16;
290 regs->dx = lba & 0xffff;
292 disk_ret(regs, DISK_RET_SUCCESS);
293 regs->ah = 3; // hard disk accessible
296 // IBM/MS installation check
298 disk_1341(struct bregs *regs, u8 device)
300 regs->bx = 0xaa55; // install check
301 regs->cx = 0x0007; // ext disk access and edd, removable supported
302 disk_ret(regs, DISK_RET_SUCCESS);
303 regs->ah = 0x30; // EDD 3.0
306 // IBM/MS extended read
308 disk_1342(struct bregs *regs, u8 device)
310 extended_access(regs, device, ATA_CMD_READ_SECTORS);
313 // IBM/MS extended write
315 disk_1343(struct bregs *regs, u8 device)
317 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
322 disk_1344(struct bregs *regs, u8 device)
324 extended_access(regs, device, 0);
327 // IBM/MS lock/unlock drive
329 disk_1345(struct bregs *regs, u8 device)
331 // Always success for HD
332 disk_ret(regs, DISK_RET_SUCCESS);
335 // IBM/MS eject media
337 disk_1346(struct bregs *regs, u8 device)
339 // Volume Not Removable
340 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
343 // IBM/MS extended seek
345 disk_1347(struct bregs *regs, u8 device)
347 extended_access(regs, device, 0);
350 // IBM/MS get drive parameters
352 disk_1348(struct bregs *regs, u8 device)
354 u16 size = GET_INT13DPT(regs, size);
356 // Buffer is too small
358 disk_ret(regs, DISK_RET_EPARAM);
364 u8 type = GET_EBDA(ata.devices[device].type);
365 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
366 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
367 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
368 u32 lba = GET_EBDA(ata.devices[device].sectors);
369 u16 blksize = GET_EBDA(ata.devices[device].blksize);
371 SET_INT13DPT(regs, size, 0x1a);
372 if (type == ATA_TYPE_ATA) {
373 if ((lba/npspt)/nph > 0x3fff) {
374 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
375 SET_INT13DPT(regs, cylinders, 0x3fff);
377 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
378 SET_INT13DPT(regs, cylinders, (u32)npc);
380 SET_INT13DPT(regs, heads, (u32)nph);
381 SET_INT13DPT(regs, spt, (u32)npspt);
382 SET_INT13DPT(regs, sector_count1, lba); // FIXME should be Bit64
383 SET_INT13DPT(regs, sector_count2, 0L);
386 // 0x74 = removable, media change, lockable, max values
387 SET_INT13DPT(regs, infos, 0x74);
388 SET_INT13DPT(regs, cylinders, 0xffffffff);
389 SET_INT13DPT(regs, heads, 0xffffffff);
390 SET_INT13DPT(regs, spt, 0xffffffff);
391 SET_INT13DPT(regs, sector_count1, 0xffffffff); // FIXME should be Bit64
392 SET_INT13DPT(regs, sector_count2, 0xffffffff);
394 SET_INT13DPT(regs, blksize, blksize);
397 disk_ret(regs, DISK_RET_SUCCESS);
403 SET_INT13DPT(regs, size, 0x1e);
405 SET_INT13DPT(regs, dpte_segment, SEG_EBDA);
406 SET_INT13DPT(regs, dpte_offset
407 , offsetof(struct extended_bios_data_area_s, ata.dpte));
410 u8 channel = device / 2;
411 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
412 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
413 u8 irq = GET_EBDA(ata.channels[channel].irq);
414 u8 mode = GET_EBDA(ata.devices[device].mode);
417 if (type == ATA_TYPE_ATA) {
418 u8 translation = GET_EBDA(ata.devices[device].translation);
419 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
420 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
421 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
424 options = (1<<5); // removable device
425 options |= (1<<6); // atapi device
427 options |= (1<<4); // lba translation
428 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
430 SET_EBDA(ata.dpte.iobase1, iobase1);
431 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
432 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
433 SET_EBDA(ata.dpte.unused, 0xcb );
434 SET_EBDA(ata.dpte.irq, irq );
435 SET_EBDA(ata.dpte.blkcount, 1 );
436 SET_EBDA(ata.dpte.dma, 0 );
437 SET_EBDA(ata.dpte.pio, 0 );
438 SET_EBDA(ata.dpte.options, options);
439 SET_EBDA(ata.dpte.reserved, 0);
441 SET_EBDA(ata.dpte.revision, 0x11);
443 SET_EBDA(ata.dpte.revision, 0x10);
445 u8 *p = MAKE_FARPTR(SEG_EBDA
446 , offsetof(struct extended_bios_data_area_s, ata.dpte));
447 u8 sum = checksum(p, 15);
448 SET_EBDA(ata.dpte.checksum, ~sum);
451 disk_ret(regs, DISK_RET_SUCCESS);
456 channel = device / 2;
457 u8 iface = GET_EBDA(ata.channels[channel].iface);
458 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
460 SET_INT13DPT(regs, size, 0x42);
461 SET_INT13DPT(regs, key, 0xbedd);
462 SET_INT13DPT(regs, dpi_length, 0x24);
463 SET_INT13DPT(regs, reserved1, 0);
464 SET_INT13DPT(regs, reserved2, 0);
466 if (iface==ATA_IFACE_ISA) {
467 SET_INT13DPT(regs, host_bus[0], 'I');
468 SET_INT13DPT(regs, host_bus[1], 'S');
469 SET_INT13DPT(regs, host_bus[2], 'A');
470 SET_INT13DPT(regs, host_bus[3], 0);
474 SET_INT13DPT(regs, iface_type[0], 'A');
475 SET_INT13DPT(regs, iface_type[1], 'T');
476 SET_INT13DPT(regs, iface_type[2], 'A');
477 SET_INT13DPT(regs, iface_type[3], 0);
479 if (iface==ATA_IFACE_ISA) {
480 SET_INT13DPT(regs, iface_path[0], iobase1);
481 SET_INT13DPT(regs, iface_path[2], 0);
482 SET_INT13DPT(regs, iface_path[4], 0L);
486 SET_INT13DPT(regs, device_path[0], device%2);
487 SET_INT13DPT(regs, device_path[1], 0);
488 SET_INT13DPT(regs, device_path[2], 0);
489 SET_INT13DPT(regs, device_path[4], 0L);
491 sum = checksum(MAKE_FARPTR(regs->ds, 30), 34);
492 SET_INT13DPT(regs, checksum, ~sum);
495 // IBM/MS extended media change
497 disk_1349(struct bregs *regs, u8 device)
499 // Always success for HD
500 disk_ret(regs, DISK_RET_SUCCESS);
504 disk_134e01(struct bregs *regs, u8 device)
506 disk_ret(regs, DISK_RET_SUCCESS);
510 disk_134e03(struct bregs *regs, u8 device)
512 disk_ret(regs, DISK_RET_SUCCESS);
516 disk_134e04(struct bregs *regs, u8 device)
518 disk_ret(regs, DISK_RET_SUCCESS);
522 disk_134e06(struct bregs *regs, u8 device)
524 disk_ret(regs, DISK_RET_SUCCESS);
528 disk_134eXX(struct bregs *regs, u8 device)
530 disk_ret(regs, DISK_RET_EPARAM);
533 // IBM/MS set hardware configuration
535 disk_134e(struct bregs *regs, u8 device)
538 case 0x01: disk_134e01(regs, device); break;
539 case 0x03: disk_134e03(regs, device); break;
540 case 0x04: disk_134e04(regs, device); break;
541 case 0x06: disk_134e06(regs, device); break;
542 default: disk_134eXX(regs, device); break;
547 disk_13XX(struct bregs *regs, u8 device)
549 disk_ret(regs, DISK_RET_EPARAM);
553 disk_13(struct bregs *regs, u8 device)
557 // clear completion flag
558 SET_BDA(disk_interrupt_flag, 0);
561 case 0x00: disk_1300(regs, device); break;
562 case 0x01: disk_1301(regs, device); break;
563 case 0x02: disk_1302(regs, device); break;
564 case 0x03: disk_1303(regs, device); break;
565 case 0x04: disk_1304(regs, device); break;
566 case 0x05: disk_1305(regs, device); break;
567 case 0x08: disk_1308(regs, device); break;
568 case 0x09: disk_1309(regs, device); break;
569 case 0x0c: disk_130c(regs, device); break;
570 case 0x0d: disk_130d(regs, device); break;
571 case 0x10: disk_1310(regs, device); break;
572 case 0x11: disk_1311(regs, device); break;
573 case 0x14: disk_1314(regs, device); break;
574 case 0x15: disk_1315(regs, device); break;
575 case 0x41: disk_1341(regs, device); break;
576 case 0x42: disk_1342(regs, device); break;
577 case 0x43: disk_1343(regs, device); break;
578 case 0x44: disk_1344(regs, device); break;
579 case 0x45: disk_1345(regs, device); break;
580 case 0x46: disk_1346(regs, device); break;
581 case 0x47: disk_1347(regs, device); break;
582 case 0x48: disk_1348(regs, device); break;
583 case 0x49: disk_1349(regs, device); break;
584 case 0x4e: disk_134e(regs, device); break;
585 default: disk_13XX(regs, device); break;
590 /****************************************************************
592 ****************************************************************/
595 get_device(struct bregs *regs, u8 iscd, u8 drive)
597 // basic check : device has to be defined
598 if (drive >= CONFIG_MAX_ATA_DEVICES) {
599 disk_ret(regs, DISK_RET_EPARAM);
600 return CONFIG_MAX_ATA_DEVICES;
603 // Get the ata channel
604 u8 device = GET_EBDA(ata.idmap[iscd][drive]);
606 // basic check : device has to be valid
607 if (device >= CONFIG_MAX_ATA_DEVICES) {
608 disk_ret(regs, DISK_RET_EPARAM);
609 return CONFIG_MAX_ATA_DEVICES;
616 handle_legacy_disk(struct bregs *regs, u8 drive)
619 floppy_13(regs, drive);
624 // XXX - old code had other disk access method.
625 disk_ret(regs, DISK_RET_EPARAM);
630 u8 device = get_device(regs, 1, drive - 0xe0);
631 if (device >= CONFIG_MAX_ATA_DEVICES)
633 cdrom_13(regs, device);
637 u8 device = get_device(regs, 0, drive - 0x80);
638 if (device >= CONFIG_MAX_ATA_DEVICES)
640 disk_13(regs, device);
644 handle_40(struct bregs *regs)
647 handle_legacy_disk(regs, regs->dl);
650 // INT 13h Fixed Disk Services Entry Point
652 handle_13(struct bregs *regs)
657 if (CONFIG_CDROM_EMU) {
658 if (regs->ah == 0x4b) {
662 if (GET_EBDA(cdemu.active)) {
663 if (drive == GET_EBDA(cdemu.emulated_drive)) {
671 handle_legacy_disk(regs, drive);
674 // record completion in BIOS task complete flag
679 SET_BDA(disk_interrupt_flag, 0xff);