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
17 /****************************************************************
19 ****************************************************************/
22 __disk_ret(const char *fname, int lineno, struct bregs *regs, u8 code)
24 SET_BDA(disk_last_status, code);
26 __set_code_fail(fname, lineno, regs, code);
28 set_code_success(regs);
32 __disk_stub(const char *fname, int lineno, struct bregs *regs)
34 __debug_stub(fname, lineno, regs);
35 __disk_ret(fname, lineno, regs, DISK_RET_SUCCESS);
38 #define DISK_STUB(regs) \
39 __disk_stub(__func__, __LINE__, (regs))
42 basic_access(struct bregs *regs, u8 device, u16 command)
44 u8 type = GET_EBDA(ata.devices[device].type);
46 if (type == ATA_TYPE_ATA) {
47 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
48 nlh = GET_EBDA(ata.devices[device].lchs.heads);
49 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
51 // Must be cd emulation.
52 nlc = GET_EBDA(cdemu.vdevice.cylinders);
53 nlh = GET_EBDA(cdemu.vdevice.heads);
54 nlspt = GET_EBDA(cdemu.vdevice.spt);
58 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
59 u16 sector = regs->cl & 0x3f;
62 if (count > 128 || count == 0 || sector == 0) {
63 dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n"
65 disk_ret(regs, DISK_RET_EPARAM);
69 // sanity check on cyl heads, sec
70 if (cylinder >= nlc || head >= nlh || sector > nlspt) {
71 dprintf(1, "int13_harddisk: function %02x, parameters out of"
72 " range %04x/%04x/%04x!\n"
73 , regs->ah, cylinder, head, sector);
74 disk_ret(regs, DISK_RET_EPARAM);
80 disk_ret(regs, DISK_RET_SUCCESS);
84 // translate lchs to lba
85 u32 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
88 u16 segment = regs->es;
89 u16 offset = regs->bx;
90 void *far_buffer = MAKE_FARPTR(segment, offset);
95 if (type == ATA_TYPE_ATA)
96 status = ata_cmd_data(device, command, lba, count, far_buffer);
98 status = cdrom_read_emu(device, lba, count, far_buffer);
102 // Set nb of sector transferred
103 regs->al = GET_EBDA(ata.trsfsectors);
106 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
108 disk_ret(regs, DISK_RET_EBADTRACK);
110 disk_ret(regs, DISK_RET_SUCCESS);
114 extended_access(struct bregs *regs, u8 device, u16 command)
116 // Get lba and check.
117 u64 lba = GET_INT13EXT(regs, lba);
118 u8 type = GET_EBDA(ata.devices[device].type);
119 if (type == ATA_TYPE_ATA
120 && lba >= GET_EBDA(ata.devices[device].sectors)) {
121 dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
123 disk_ret(regs, DISK_RET_EPARAM);
129 disk_ret(regs, DISK_RET_SUCCESS);
133 u16 segment = GET_INT13EXT(regs, segment);
134 u16 offset = GET_INT13EXT(regs, offset);
135 void *far_buffer = MAKE_FARPTR(segment, offset);
136 u16 count = GET_INT13EXT(regs, count);
141 if (type == ATA_TYPE_ATA)
142 status = ata_cmd_data(device, command, lba, count, far_buffer);
144 status = cdrom_read(device, lba, count, far_buffer);
148 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
151 dprintf(1, "int13_harddisk: function %02x, error %d!\n"
153 disk_ret(regs, DISK_RET_EBADTRACK);
156 disk_ret(regs, DISK_RET_SUCCESS);
160 /****************************************************************
161 * Hard Drive functions
162 ****************************************************************/
164 // disk controller reset
166 disk_1300(struct bregs *regs, u8 device)
173 disk_1301(struct bregs *regs, u8 device)
175 u8 v = GET_BDA(disk_last_status);
178 // XXX - clear disk_last_status?
183 disk_1302(struct bregs *regs, u8 device)
185 basic_access(regs, device, ATA_CMD_READ_SECTORS);
188 // write disk sectors
190 disk_1303(struct bregs *regs, u8 device)
192 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
195 // verify disk sectors
197 disk_1304(struct bregs *regs, u8 device)
199 basic_access(regs, device, 0);
205 disk_1305(struct bregs *regs, u8 device)
210 // read disk drive parameters
212 disk_1308(struct bregs *regs, u8 device)
214 // Get logical geometry from table
215 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
216 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
217 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
218 u16 count = GET_EBDA(ata.hdcount);
220 nlc = nlc - 2; /* 0 based , last sector not used */
222 regs->ch = nlc & 0xff;
223 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
225 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
227 // FIXME should set ES & DI
228 disk_ret(regs, DISK_RET_SUCCESS);
231 // initialize drive parameters
233 disk_1309(struct bregs *regs, u8 device)
238 // seek to specified cylinder
240 disk_130c(struct bregs *regs, u8 device)
245 // alternate disk reset
247 disk_130d(struct bregs *regs, u8 device)
254 disk_1310(struct bregs *regs, u8 device)
256 // should look at 40:8E also???
258 // Read the status from controller
259 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
260 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
261 disk_ret(regs, DISK_RET_SUCCESS);
263 disk_ret(regs, DISK_RET_ENOTREADY);
268 disk_1311(struct bregs *regs, u8 device)
273 // controller internal diagnostic
275 disk_1314(struct bregs *regs, u8 device)
280 // read disk drive size
282 disk_1315(struct bregs *regs, u8 device)
284 // Get logical geometry from table
285 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
286 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
287 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
289 // Compute sector count seen by int13
290 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
291 regs->cx = lba >> 16;
292 regs->dx = lba & 0xffff;
294 disk_ret(regs, DISK_RET_SUCCESS);
295 regs->ah = 3; // hard disk accessible
298 // IBM/MS installation check
300 disk_1341(struct bregs *regs, u8 device)
302 regs->bx = 0xaa55; // install check
303 regs->cx = 0x0007; // ext disk access and edd, removable supported
304 disk_ret(regs, DISK_RET_SUCCESS);
305 regs->ah = 0x30; // EDD 3.0
308 // IBM/MS extended read
310 disk_1342(struct bregs *regs, u8 device)
312 extended_access(regs, device, ATA_CMD_READ_SECTORS);
315 // IBM/MS extended write
317 disk_1343(struct bregs *regs, u8 device)
319 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
324 disk_1344(struct bregs *regs, u8 device)
326 extended_access(regs, device, 0);
329 // IBM/MS lock/unlock drive
331 disk_1345(struct bregs *regs, u8 device)
333 // Always success for HD
334 disk_ret(regs, DISK_RET_SUCCESS);
337 // IBM/MS eject media
339 disk_1346(struct bregs *regs, u8 device)
341 // Volume Not Removable
342 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
345 // IBM/MS extended seek
347 disk_1347(struct bregs *regs, u8 device)
349 extended_access(regs, device, 0);
352 // IBM/MS get drive parameters
354 disk_1348(struct bregs *regs, u8 device)
356 u16 size = GET_INT13DPT(regs, size);
358 // Buffer is too small
360 disk_ret(regs, DISK_RET_EPARAM);
366 u8 type = GET_EBDA(ata.devices[device].type);
367 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
368 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
369 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
370 u64 lba = GET_EBDA(ata.devices[device].sectors);
371 u16 blksize = GET_EBDA(ata.devices[device].blksize);
373 SET_INT13DPT(regs, size, 0x1a);
374 if (type == ATA_TYPE_ATA) {
375 if (lba > (u64)npspt*nph*0x3fff) {
376 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
377 SET_INT13DPT(regs, cylinders, 0x3fff);
379 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
380 SET_INT13DPT(regs, cylinders, (u32)npc);
382 SET_INT13DPT(regs, heads, (u32)nph);
383 SET_INT13DPT(regs, spt, (u32)npspt);
384 SET_INT13DPT(regs, sector_count, lba);
387 // 0x74 = removable, media change, lockable, max values
388 SET_INT13DPT(regs, infos, 0x74);
389 SET_INT13DPT(regs, cylinders, 0xffffffff);
390 SET_INT13DPT(regs, heads, 0xffffffff);
391 SET_INT13DPT(regs, spt, 0xffffffff);
392 SET_INT13DPT(regs, sector_count, (u64)-1);
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)
646 debug_enter(regs, DEBUG_HDL_40);
647 handle_legacy_disk(regs, regs->dl);
650 // INT 13h Fixed Disk Services Entry Point
652 handle_13(struct bregs *regs)
654 debug_enter(regs, DEBUG_HDL_13);
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
678 debug_isr(DEBUG_ISR_76);
679 SET_BDA(disk_interrupt_flag, 0xff);