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Kevin O'Connorf076a3e2008-02-25 22:25:15 -05001// 16bit code to access hard drives.
2//
3// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4// Copyright (C) 2002 MandrakeSoft S.A.
5//
6// This file may be distributed under the terms of the GNU GPLv3 license.
7
8#include "disk.h" // floppy_13
9#include "biosvar.h" // struct bregs
Kevin O'Connor3491e8b2008-02-29 00:22:27 -050010#include "config.h" // CONFIG_*
11#include "cmos.h" // inb_cmos
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050012#include "util.h" // debug_enter
Kevin O'Connor3491e8b2008-02-29 00:22:27 -050013#include "ata.h" // ATA_*
14
Kevin O'Connor3491e8b2008-02-29 00:22:27 -050015static inline void
16disk_ret(struct bregs *regs, u8 code)
17{
18 regs->ah = code;
19 SET_BDA(disk_last_status, code);
20 set_cf(regs, code);
21}
22
Kevin O'Connore43df9e2008-03-01 22:16:32 -050023#define DISK_STUB(regs) do { \
24 struct bregs *__regs = (regs); \
25 debug_stub(__regs); \
26 disk_ret(__regs, DISK_RET_SUCCESS); \
27 } while (0)
28
29static u8
30checksum_seg(u16 seg, u16 offset, u32 len)
31{
32 u32 i;
33 u8 sum = 0;
34 for (i=0; i<len; i++)
35 sum += GET_FARVAR(seg, *(u8*)(offset+i));
36 return sum;
37}
38
39static void
40basic_access(struct bregs *regs, u8 device, u16 command)
41{
42 u16 count = regs->al;
43 u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
44 u16 sector = regs->cl & 0x3f;
45 u16 head = regs->dh;
46
47 if ((count > 128) || (count == 0) || (sector == 0)) {
48 BX_INFO("int13_harddisk: function %02x, parameter out of range!\n"
49 , regs->ah);
50 disk_ret(regs, DISK_RET_EPARAM);
51 return;
52 }
53
54 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
55 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
56 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
57 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
58 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
59
60 // sanity check on cyl heads, sec
61 if ( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
62 BX_INFO("int13_harddisk: function %02x, parameters out of"
63 " range %04x/%04x/%04x!\n"
64 , regs->ah, cylinder, head, sector);
65 disk_ret(regs, DISK_RET_EPARAM);
66 return;
67 }
68
69 u32 lba = 0;
70 // if needed, translate lchs to lba, and execute command
71 if ( (nph != nlh) || (npspt != nlspt)) {
72 lba = (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
73 + (u32)sector - 1);
74 sector = 0; // this forces the command to be lba
75 }
76
77 u16 segment = regs->es;
78 u16 offset = regs->bx;
79
80 u8 status;
81 switch (command) {
82 case ATA_CMD_READ_SECTORS:
83 status = ata_cmd_data_in(device, ATA_CMD_READ_SECTORS
84 , count, cylinder, head, sector
85 , lba, segment, offset);
86 break;
87 case ATA_CMD_WRITE_SECTORS:
88 status = ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS
89 , count, cylinder, head, sector
90 , lba, segment, offset);
91 break;
92 default:
93 disk_ret(regs, DISK_RET_SUCCESS);
94 return;
95 }
96
97 // Set nb of sector transferred
98 regs->al = GET_EBDA(ata.trsfsectors);
99
100 if (status != 0) {
101 BX_INFO("int13_harddisk: function %02x, error %02x !\n",regs->ah,status);
102 disk_ret(regs, DISK_RET_EBADTRACK);
103 }
104 disk_ret(regs, DISK_RET_SUCCESS);
105}
106
107static void
108extended_access(struct bregs *regs, u8 device, u16 command)
109{
110 u16 count = GET_INT13EXT(regs, count);
111 u16 segment = GET_INT13EXT(regs, segment);
112 u16 offset = GET_INT13EXT(regs, offset);
113
114 // Can't use 64 bits lba
115 u32 lba = GET_INT13EXT(regs, lba2);
116 if (lba != 0L) {
117 BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n"
118 , regs->ah);
119 disk_ret(regs, DISK_RET_EPARAM);
120 return;
121 }
122
123 // Get 32 bits lba and check
124 lba = GET_INT13EXT(regs, lba1);
125 if (lba >= GET_EBDA(ata.devices[device].sectors)) {
126 BX_INFO("int13_harddisk: function %02x. LBA out of range\n", regs->ah);
127 disk_ret(regs, DISK_RET_EPARAM);
128 return;
129 }
130
131 u8 status;
132 switch (command) {
133 case ATA_CMD_READ_SECTORS:
134 status = ata_cmd_data_in(device, ATA_CMD_READ_SECTORS
135 , count, 0, 0, 0
136 , lba, segment, offset);
137 break;
138 case ATA_CMD_WRITE_SECTORS:
139 status = ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS
140 , count, 0, 0, 0
141 , lba, segment, offset);
142 break;
143 default:
144 // If verify or seek
145 disk_ret(regs, DISK_RET_SUCCESS);
146 return;
147 }
148
149 SET_INT13EXT(regs, count, GET_EBDA(ata.trsfsectors));
150
151 if (status != 0) {
152 BX_INFO("int13_harddisk: function %02x, error %02x !\n"
153 , regs->ah, status);
154 disk_ret(regs, DISK_RET_EBADTRACK);
155 return;
156 }
157 disk_ret(regs, DISK_RET_SUCCESS);
158}
159
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500160// disk controller reset
161static void
162disk_1300(struct bregs *regs, u8 device)
163{
164 ata_reset(device);
165}
166
167// read disk status
168static void
169disk_1301(struct bregs *regs, u8 device)
170{
171 regs->ah = GET_BDA(disk_last_status);
172 disk_ret(regs, DISK_RET_SUCCESS);
173}
174
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500175// read disk sectors
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500176static void
177disk_1302(struct bregs *regs, u8 device)
178{
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500179 basic_access(regs, device, ATA_CMD_READ_SECTORS);
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500180}
181
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500182// write disk sectors
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500183static void
184disk_1303(struct bregs *regs, u8 device)
185{
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500186 basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500187}
188
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500189// verify disk sectors
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500190static void
191disk_1304(struct bregs *regs, u8 device)
192{
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500193 basic_access(regs, device, 0);
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500194 // FIXME verify
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500195}
196
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500197// format disk track
198static void
199disk_1305(struct bregs *regs, u8 device)
200{
201 DISK_STUB(regs);
202}
203
204// read disk drive parameters
205static void
206disk_1308(struct bregs *regs, u8 device)
207{
208 // Get logical geometry from table
209 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
210 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
211 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
212 u16 count = GET_EBDA(ata.hdcount);
213
214 nlc = nlc - 2; /* 0 based , last sector not used */
215 regs->al = 0;
216 regs->ch = nlc & 0xff;
217 regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
218 regs->dh = nlh - 1;
219 regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
220
221 // FIXME should set ES & DI
222 disk_ret(regs, DISK_RET_SUCCESS);
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500223}
224
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500225// initialize drive parameters
226static void
227disk_1309(struct bregs *regs, u8 device)
228{
229 DISK_STUB(regs);
230}
231
232// seek to specified cylinder
233static void
234disk_130c(struct bregs *regs, u8 device)
235{
236 DISK_STUB(regs);
237}
238
239// alternate disk reset
240static void
241disk_130d(struct bregs *regs, u8 device)
242{
243 DISK_STUB(regs);
244}
245
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500246// check drive ready
247static void
248disk_1310(struct bregs *regs, u8 device)
249{
250 // should look at 40:8E also???
251
252 // Read the status from controller
253 u8 status = inb(GET_EBDA(ata.channels[device/2].iobase1) + ATA_CB_STAT);
254 if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
255 disk_ret(regs, DISK_RET_SUCCESS);
256 else
257 disk_ret(regs, DISK_RET_ENOTREADY);
258}
259
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500260// recalibrate
261static void
262disk_1311(struct bregs *regs, u8 device)
263{
264 DISK_STUB(regs);
265}
266
267// controller internal diagnostic
268static void
269disk_1314(struct bregs *regs, u8 device)
270{
271 DISK_STUB(regs);
272}
273
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500274// read disk drive size
275static void
276disk_1315(struct bregs *regs, u8 device)
277{
278 // Get logical geometry from table
279 u16 nlc = GET_EBDA(ata.devices[device].lchs.cylinders);
280 u16 nlh = GET_EBDA(ata.devices[device].lchs.heads);
281 u16 nlspt = GET_EBDA(ata.devices[device].lchs.spt);
282
283 // Compute sector count seen by int13
284 u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
285 regs->cx = lba >> 16;
286 regs->dx = lba & 0xffff;
287
288 disk_ret(regs, 0);
289 regs->ah = 3; // hard disk accessible
290}
291
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500292// IBM/MS installation check
293static void
294disk_1341(struct bregs *regs, u8 device)
295{
296 regs->bx = 0xaa55; // install check
297 regs->cx = 0x0007; // ext disk access and edd, removable supported
298 disk_ret(regs, DISK_RET_SUCCESS);
299 regs->ah = 0x30; // EDD 3.0
300}
301
302// IBM/MS extended read
303static void
304disk_1342(struct bregs *regs, u8 device)
305{
306 extended_access(regs, device, ATA_CMD_READ_SECTORS);
307}
308
309// IBM/MS extended write
310static void
311disk_1343(struct bregs *regs, u8 device)
312{
313 extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
314}
315
316// IBM/MS verify
317static void
318disk_1344(struct bregs *regs, u8 device)
319{
320 extended_access(regs, device, 0);
321}
322
323// IBM/MS lock/unlock drive
324static void
325disk_1345(struct bregs *regs, u8 device)
326{
327 // Always success for HD
328 disk_ret(regs, DISK_RET_SUCCESS);
329}
330
331// IBM/MS eject media
332static void
333disk_1346(struct bregs *regs, u8 device)
334{
335 // Volume Not Removable
336 disk_ret(regs, DISK_RET_ENOTREMOVABLE);
337}
338
339// IBM/MS extended seek
340static void
341disk_1347(struct bregs *regs, u8 device)
342{
343 extended_access(regs, device, 0);
344}
345
346// IBM/MS get drive parameters
347static void
348disk_1348(struct bregs *regs, u8 device)
349{
350 u16 size = GET_INT13DPT(regs, size);
351
352 // Buffer is too small
353 if (size < 0x1a) {
354 disk_ret(regs, DISK_RET_EPARAM);
355 return;
356 }
357
358 // EDD 1.x
359
360 u16 npc = GET_EBDA(ata.devices[device].pchs.cylinders);
361 u16 nph = GET_EBDA(ata.devices[device].pchs.heads);
362 u16 npspt = GET_EBDA(ata.devices[device].pchs.spt);
363 u32 lba = GET_EBDA(ata.devices[device].sectors);
364 u16 blksize = GET_EBDA(ata.devices[device].blksize);
365
366 SET_INT13DPT(regs, size, 0x1a);
367 if ((lba/npspt)/nph > 0x3fff) {
368 SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
369 SET_INT13DPT(regs, cylinders, 0x3fff);
370 } else {
371 SET_INT13DPT(regs, infos, 0x02); // geometry is valid
372 SET_INT13DPT(regs, cylinders, (u32)npc);
373 }
374 SET_INT13DPT(regs, heads, (u32)nph);
375 SET_INT13DPT(regs, spt, (u32)npspt);
376 SET_INT13DPT(regs, sector_count1, lba); // FIXME should be Bit64
377 SET_INT13DPT(regs, sector_count2, 0L);
378 SET_INT13DPT(regs, blksize, blksize);
379
380 if (size < 0x1e) {
381 disk_ret(regs, DISK_RET_SUCCESS);
382 return;
383 }
384
385 // EDD 2.x
386
387 SET_INT13DPT(regs, size, 0x1e);
388
389 SET_INT13DPT(regs, dpte_segment, EBDA_SEG);
390 SET_INT13DPT(regs, dpte_offset
391 , offsetof(struct extended_bios_data_area_s, ata.dpte));
392
393 // Fill in dpte
394 u8 channel = device / 2;
395 u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
396 u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
397 u8 irq = GET_EBDA(ata.channels[channel].irq);
398 u8 mode = GET_EBDA(ata.devices[device].mode);
399 u8 translation = GET_EBDA(ata.devices[device].translation);
400
401 u16 options = (translation==ATA_TRANSLATION_NONE?0:1)<<3; // chs translation
402 options |= (1<<4); // lba translation
403 options |= (mode==ATA_MODE_PIO32?1:0)<<7;
404 options |= (translation==ATA_TRANSLATION_LBA?1:0)<<9;
405 options |= (translation==ATA_TRANSLATION_RECHS?3:0)<<9;
406
407 SET_EBDA(ata.dpte.iobase1, iobase1);
408 SET_EBDA(ata.dpte.iobase2, iobase2 + ATA_CB_DC);
409 SET_EBDA(ata.dpte.prefix, (0xe | (device % 2))<<4 );
410 SET_EBDA(ata.dpte.unused, 0xcb );
411 SET_EBDA(ata.dpte.irq, irq );
412 SET_EBDA(ata.dpte.blkcount, 1 );
413 SET_EBDA(ata.dpte.dma, 0 );
414 SET_EBDA(ata.dpte.pio, 0 );
415 SET_EBDA(ata.dpte.options, options);
416 SET_EBDA(ata.dpte.reserved, 0);
417 if (size >= 0x42)
418 SET_EBDA(ata.dpte.revision, 0x11);
419 else
420 SET_EBDA(ata.dpte.revision, 0x10);
421
422 u8 sum = checksum_seg(EBDA_SEG
423 , offsetof(struct extended_bios_data_area_s, ata.dpte)
424 , 15);
425 SET_EBDA(ata.dpte.checksum, ~sum);
426
427 if (size < 0x42) {
428 disk_ret(regs, DISK_RET_SUCCESS);
429 return;
430 }
431
432 // EDD 3.x
433 channel = device / 2;
434 u8 iface = GET_EBDA(ata.channels[channel].iface);
435 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
436
437 SET_INT13DPT(regs, size, 0x42);
438 SET_INT13DPT(regs, key, 0xbedd);
439 SET_INT13DPT(regs, dpi_length, 0x24);
440 SET_INT13DPT(regs, reserved1, 0);
441 SET_INT13DPT(regs, reserved2, 0);
442
443 if (iface==ATA_IFACE_ISA) {
444 SET_INT13DPT(regs, host_bus[0], 'I');
445 SET_INT13DPT(regs, host_bus[1], 'S');
446 SET_INT13DPT(regs, host_bus[2], 'A');
447 SET_INT13DPT(regs, host_bus[3], 0);
448 } else {
449 // FIXME PCI
450 }
451 SET_INT13DPT(regs, iface_type[0], 'A');
452 SET_INT13DPT(regs, iface_type[1], 'T');
453 SET_INT13DPT(regs, iface_type[2], 'A');
454 SET_INT13DPT(regs, iface_type[3], 0);
455
456 if (iface==ATA_IFACE_ISA) {
457 SET_INT13DPT(regs, iface_path[0], iobase1);
458 SET_INT13DPT(regs, iface_path[2], 0);
459 SET_INT13DPT(regs, iface_path[4], 0L);
460 } else {
461 // FIXME PCI
462 }
463 SET_INT13DPT(regs, device_path[0], device%2);
464 SET_INT13DPT(regs, device_path[1], 0);
465 SET_INT13DPT(regs, device_path[2], 0);
466 SET_INT13DPT(regs, device_path[4], 0L);
467
468 sum = checksum_seg(regs->ds, 30, 34);
469 SET_INT13DPT(regs, checksum, ~sum);
470}
471
472// IBM/MS extended media change
473static void
474disk_1349(struct bregs *regs, u8 device)
475{
476 // Always success for HD
477 disk_ret(regs, DISK_RET_SUCCESS);
478}
479
480static void
481disk_134e01(struct bregs *regs, u8 device)
482{
483 disk_ret(regs, DISK_RET_SUCCESS);
484}
485
486static void
487disk_134e03(struct bregs *regs, u8 device)
488{
489 disk_ret(regs, DISK_RET_SUCCESS);
490}
491
492static void
493disk_134e04(struct bregs *regs, u8 device)
494{
495 disk_ret(regs, DISK_RET_SUCCESS);
496}
497
498static void
499disk_134e06(struct bregs *regs, u8 device)
500{
501 disk_ret(regs, DISK_RET_SUCCESS);
502}
503
504static void
505disk_134eXX(struct bregs *regs, u8 device)
506{
507 debug_stub(regs);
508 disk_ret(regs, DISK_RET_EPARAM);
509}
510
511// IBM/MS set hardware configuration
512static void
513disk_134e(struct bregs *regs, u8 device)
514{
515 switch (regs->al) {
516 case 0x01: disk_134e01(regs, device); break;
517 case 0x03: disk_134e03(regs, device); break;
518 case 0x04: disk_134e04(regs, device); break;
519 case 0x06: disk_134e06(regs, device); break;
520 default: disk_134eXX(regs, device); break;
521 }
522}
523
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500524static void
525disk_13XX(struct bregs *regs, u8 device)
526{
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500527 debug_stub(regs);
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500528 disk_ret(regs, DISK_RET_EPARAM);
529}
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500530
531static void
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500532disk_13(struct bregs *regs, u8 device)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500533{
Kevin O'Connor15aee2e2008-03-01 13:34:04 -0500534 //debug_stub(regs);
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500535
536 // clear completion flag
537 SET_BDA(disk_interrupt_flag, 0);
538
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500539 switch (regs->ah) {
540 case 0x00: disk_1300(regs, device); break;
541 case 0x01: disk_1301(regs, device); break;
542 case 0x02: disk_1302(regs, device); break;
543 case 0x03: disk_1303(regs, device); break;
544 case 0x04: disk_1304(regs, device); break;
545 case 0x05: disk_1305(regs, device); break;
546 case 0x08: disk_1308(regs, device); break;
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500547 case 0x09: disk_1309(regs, device); break;
548 case 0x0c: disk_130c(regs, device); break;
549 case 0x0d: disk_130d(regs, device); break;
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500550 case 0x10: disk_1310(regs, device); break;
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500551 case 0x11: disk_1311(regs, device); break;
552 case 0x14: disk_1314(regs, device); break;
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500553 case 0x15: disk_1315(regs, device); break;
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500554 case 0x41: disk_1341(regs, device); break;
555 case 0x42: disk_1342(regs, device); break;
556 case 0x43: disk_1343(regs, device); break;
557 case 0x44: disk_1344(regs, device); break;
558 case 0x45: disk_1345(regs, device); break;
559 case 0x46: disk_1346(regs, device); break;
560 case 0x47: disk_1347(regs, device); break;
561 case 0x48: disk_1348(regs, device); break;
562 case 0x49: disk_1349(regs, device); break;
563 case 0x4e: disk_134e(regs, device); break;
Kevin O'Connor3491e8b2008-02-29 00:22:27 -0500564 default: disk_13XX(regs, device); break;
565 }
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500566}
567
568static void
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500569cdrom_13(struct bregs *regs, u8 device)
570{
571 // XXX
572 disk_13XX(regs, device);
573}
574
575static u8
576get_device(struct bregs *regs, u8 drive)
577{
578 // basic check : device has to be defined
579 if (drive >= CONFIG_MAX_ATA_DEVICES) {
580 disk_ret(regs, DISK_RET_EPARAM);
581 return CONFIG_MAX_ATA_DEVICES;
582 }
583
584 // Get the ata channel
585 u8 device = GET_EBDA(ata.hdidmap[drive]);
586
587 // basic check : device has to be valid
588 if (device >= CONFIG_MAX_ATA_DEVICES) {
589 disk_ret(regs, DISK_RET_EPARAM);
590 return CONFIG_MAX_ATA_DEVICES;
591 }
592
593 return device;
594}
595
596static void
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500597handle_legacy_disk(struct bregs *regs, u8 drive)
598{
599 if (drive < 0x80) {
600 floppy_13(regs, drive);
601 return;
602 }
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500603
604 if (! CONFIG_ATA) {
605 // XXX - old code had other disk access method.
606 disk_ret(regs, DISK_RET_EPARAM);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500607 return;
608 }
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500609
Kevin O'Connore43df9e2008-03-01 22:16:32 -0500610 if (drive >= 0xe0) {
611 u8 device = get_device(regs, drive - 0xe0);
612 if (device >= CONFIG_MAX_ATA_DEVICES)
613 return;
614 cdrom_13(regs, device);
615 return;
616 }
617
618 u8 device = get_device(regs, drive - 0x80);
619 if (device >= CONFIG_MAX_ATA_DEVICES)
620 return;
621 disk_13(regs, device);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500622}
623
624void VISIBLE
625handle_40(struct bregs *regs)
626{
627 debug_enter(regs);
628 handle_legacy_disk(regs, regs->dl);
629 debug_exit(regs);
630}
631
632// INT 13h Fixed Disk Services Entry Point
633void VISIBLE
634handle_13(struct bregs *regs)
635{
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500636 //debug_enter(regs);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500637 u8 drive = regs->dl;
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500638 // XXX
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500639#if BX_ELTORITO_BOOT
640 if (regs->ah >= 0x4a || regs->ah <= 0x4d) {
641 int13_eltorito(regs);
642 } else if (cdemu_isactive() && cdrom_emulated_drive()) {
643 int13_cdemu(regs);
644 } else
645#endif
646 handle_legacy_disk(regs, drive);
647 debug_exit(regs);
648}
649
650// record completion in BIOS task complete flag
651void VISIBLE
652handle_76(struct bregs *regs)
653{
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500654 debug_isr(regs);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500655 SET_BDA(floppy_harddisk_info, 0xff);
656 eoi_both_pics();
657}