1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /*␊ |
25 | * Copyright 1993 NeXT Computer, Inc.␊ |
26 | * All rights reserved.␊ |
27 | */␊ |
28 | ␊ |
29 | /* Copyright 2007 David Elliott␊ |
30 | 2007-12-30 dfe␊ |
31 | - Enhanced code to normalize segment/offset to huge pointers so that any␊ |
32 | linear address within the first MB of memory can be passed to BIOS␊ |
33 | functions. This allows some of the __DATA sections to span into the␊ |
34 | next segment and also allows stack variables to be used whereas the␊ |
35 | old code could only operate on static data in the first 64k.␊ |
36 | NOTE: Requires bios.s change to respect DS.␊ |
37 | */␊ |
38 | /* Copyright 2007 VMware Inc.␊ |
39 | 2007-12-29 dfe␊ |
40 | - Added ebiosEjectMedia␊ |
41 | */␊ |
42 | #include "bootstruct.h"␊ |
43 | #include "libsaio.h"␊ |
44 | ␊ |
45 | #define MAX_DRIVES 8␊ |
46 | ␊ |
47 | static biosBuf_t bb;␊ |
48 | ␊ |
49 | int bgetc(void)␊ |
50 | {␊ |
51 | /* Poll for the next character. Most real BIOS do not need this as the␊ |
52 | INT 16h,AH=0h function will block until one is received.␊ |
53 | Unfortunately, Apple's EFI CSM will never wake up. This idea is lifted␊ |
54 | from the grub-a20.patch to GRUB's stage2/asm.S file.␊ |
55 | */␊ |
56 | while(!readKeyboardStatus())␊ |
57 | ;␊ |
58 | bb.intno = 0x16;␊ |
59 | bb.eax.r.h = 0x00;␊ |
60 | bios(&bb);␊ |
61 | return bb.eax.rr;␊ |
62 | }␊ |
63 | ␊ |
64 | int readKeyboardStatus(void)␊ |
65 | {␊ |
66 | bb.intno = 0x16;␊ |
67 | bb.eax.r.h = 0x01;␊ |
68 | bios(&bb);␊ |
69 | if (bb.flags.zf) {␊ |
70 | return 0;␊ |
71 | } else {␊ |
72 | return bb.eax.rr;␊ |
73 | }␊ |
74 | }␊ |
75 | ␊ |
76 | int readKeyboardShiftFlags(void)␊ |
77 | {␊ |
78 | bb.intno = 0x16;␊ |
79 | bb.eax.r.h = 0x02;␊ |
80 | bios(&bb);␊ |
81 | return bb.eax.r.l;␊ |
82 | }␊ |
83 | ␊ |
84 | unsigned int time18(void)␊ |
85 | {␊ |
86 | union {␊ |
87 | struct {␊ |
88 | unsigned int low:16;␊ |
89 | unsigned int high:16;␊ |
90 | } s;␊ |
91 | unsigned int i;␊ |
92 | } time;␊ |
93 | ␊ |
94 | bb.intno = 0x1a;␊ |
95 | bb.eax.r.h = 0x00;␊ |
96 | bios(&bb);␊ |
97 | time.s.low = bb.edx.rr;␊ |
98 | time.s.high = bb.ecx.rr;␊ |
99 | return time.i;␊ |
100 | }␊ |
101 | ␊ |
102 | unsigned long getMemoryMap( MemoryRange * rangeArray,␊ |
103 | unsigned long maxRangeCount,␊ |
104 | unsigned long * conMemSizePtr,␊ |
105 | unsigned long * extMemSizePtr )␊ |
106 | {␊ |
107 | #define kMemoryMapSignature 'SMAP'␊ |
108 | #define kDescriptorSizeMin 20␊ |
109 | ␊ |
110 | MemoryRange * range = (MemoryRange *)BIOS_ADDR;␊ |
111 | unsigned long count = 0;␊ |
112 | unsigned long long conMemSize = 0;␊ |
113 | unsigned long long extMemSize = 0;␊ |
114 | ␊ |
115 | // Prepare for the INT15 E820h call. Each call returns a single␊ |
116 | // memory range. A continuation value is returned that must be␊ |
117 | // provided on a subsequent call to fetch the next range.␊ |
118 | //␊ |
119 | // Certain BIOSes (Award 6.00PG) expect the upper word in EAX␊ |
120 | // to be cleared on entry, otherwise only a single range will␊ |
121 | // be reported.␊ |
122 | //␊ |
123 | // Some BIOSes will simply ignore the value of ECX on entry.␊ |
124 | // Probably best to keep its value at 20 to avoid surprises.␊ |
125 | ␊ |
126 | //printf("Get memory map 0x%x, %d\n", rangeArray);getc();␊ |
127 | if (maxRangeCount > (BIOS_LEN / sizeof(MemoryRange))) {␊ |
128 | maxRangeCount = (BIOS_LEN / sizeof(MemoryRange));␊ |
129 | }␊ |
130 | bb.ebx.rx = 0; // Initial continuation value must be zero.␊ |
131 | ␊ |
132 | while ( count < maxRangeCount )␊ |
133 | {␊ |
134 | bb.intno = 0x15;␊ |
135 | bb.eax.rx = 0xe820;␊ |
136 | bb.ecx.rx = kDescriptorSizeMin;␊ |
137 | bb.edx.rx = kMemoryMapSignature;␊ |
138 | bb.edi.rr = NORMALIZED_OFFSET( (unsigned long) range );␊ |
139 | bb.es = NORMALIZED_SEGMENT( (unsigned long) range );␊ |
140 | bios(&bb);␊ |
141 | ␊ |
142 | // Check for errors.␊ |
143 | ␊ |
144 | if ( bb.flags.cf␊ |
145 | || bb.eax.rx != kMemoryMapSignature␊ |
146 | || bb.ecx.rx != kDescriptorSizeMin ) {␊ |
147 | //printf("Got an error %x %x %x\n", bb.flags.cf,␊ |
148 | // bb.eax.rx, bb.ecx.rx);␊ |
149 | break;␊ |
150 | }␊ |
151 | ␊ |
152 | // Tally up the conventional/extended memory sizes.␊ |
153 | ␊ |
154 | if ( range->type == kMemoryRangeUsable ||␊ |
155 | range->type == kMemoryRangeACPI ||␊ |
156 | range->type == kMemoryRangeNVS )␊ |
157 | {␊ |
158 | // Tally the conventional memory ranges.␊ |
159 | if ( range->base + range->length <= 0xa0000 ) {␊ |
160 | conMemSize += range->length;␊ |
161 | } ␊ |
162 | ␊ |
163 | // Record the top of extended memory.␊ |
164 | if ( range->base >= EXTENDED_ADDR ) {␊ |
165 | extMemSize += range->length;␊ |
166 | }␊ |
167 | }␊ |
168 | ␊ |
169 | range++;␊ |
170 | count++;␊ |
171 | ␊ |
172 | // Is this the last address range?␊ |
173 | ␊ |
174 | if ( bb.ebx.rx == 0 ) {␊ |
175 | //printf("last range\n");␊ |
176 | break;␊ |
177 | }␊ |
178 | }␊ |
179 | *conMemSizePtr = conMemSize / 1024; // size in KB␊ |
180 | *extMemSizePtr = extMemSize / 1024; // size in KB␊ |
181 | ␊ |
182 | // Copy out data␊ |
183 | bcopy((char *)BIOS_ADDR, rangeArray, ((char *)range - (char *)BIOS_ADDR));␊ |
184 | ␊ |
185 | #if DEBUG␊ |
186 | {␊ |
187 | int i;␊ |
188 | printf("%d total ranges\n", count);getc();␊ |
189 | for (i=0, range = rangeArray; i<count; i++, range++) {␊ |
190 | printf("range: type %d, base 0x%x, length 0x%x\n",␊ |
191 | range->type, (unsigned int)range->base, (unsigned int)range->length); getc();␊ |
192 | }␊ |
193 | }␊ |
194 | #endif␊ |
195 | ␊ |
196 | return count;␊ |
197 | }␊ |
198 | ␊ |
199 | unsigned long getExtendedMemorySize()␊ |
200 | {␊ |
201 | // Get extended memory size for large configurations. Not used unless␊ |
202 | // the INT15, E820H call (Get System Address Map) failed.␊ |
203 | //␊ |
204 | // Input:␊ |
205 | //␊ |
206 | // AX Function Code E801h␊ |
207 | //␊ |
208 | // Outputs:␊ |
209 | //␊ |
210 | // CF Carry Flag Carry cleared indicates no error.␊ |
211 | // AX Extended 1 Number of contiguous KB between 1 and 16 MB,␊ |
212 | // maximum 0x3C00 = 15 MB.␊ |
213 | // BX Extended 2 Number of contiguous 64 KB blocks between␊ |
214 | // 16 MB and 4 GB.␊ |
215 | // CX Configured 1 Number of contiguous KB between 1 and 16 MB,␊ |
216 | // maximum 0x3C00 = 15 MB.␊ |
217 | // DX Configured 2 Number of contiguous 64 KB blocks between␊ |
218 | // 16 MB and 4 GB.␊ |
219 | ␊ |
220 | bb.intno = 0x15;␊ |
221 | bb.eax.rx = 0xe801;␊ |
222 | bios(&bb);␊ |
223 | ␊ |
224 | // Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
225 | ␊ |
226 | if ( bb.flags.cf == 0 ) return (bb.ebx.rr * 64 + bb.eax.rr);␊ |
227 | ␊ |
228 | // Get Extended memory size. Called on last resort since the return␊ |
229 | // value is limited to 16-bits (a little less than 64MB max). May␊ |
230 | // not be supported by modern BIOSes.␊ |
231 | //␊ |
232 | // Input:␊ |
233 | //␊ |
234 | // AX Function Code E801h␊ |
235 | //␊ |
236 | // Outputs:␊ |
237 | //␊ |
238 | // CF Carry Flag Carry cleared indicates no error.␊ |
239 | // AX Memory Count Number of contiguous KB above 1MB.␊ |
240 | ␊ |
241 | bb.intno = 0x15;␊ |
242 | bb.eax.rx = 0x88;␊ |
243 | bios(&bb);␊ |
244 | ␊ |
245 | // Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
246 | ␊ |
247 | return bb.flags.cf ? 0 : bb.eax.rr;␊ |
248 | }␊ |
249 | ␊ |
250 | unsigned long getConventionalMemorySize()␊ |
251 | {␊ |
252 | bb.intno = 0x12;␊ |
253 | bios(&bb);␊ |
254 | return bb.eax.rr; // kilobytes␊ |
255 | }␊ |
256 | ␊ |
257 | void video_mode(int mode)␊ |
258 | {␊ |
259 | bb.intno = 0x10;␊ |
260 | bb.eax.r.h = 0x00;␊ |
261 | bb.eax.r.l = mode;␊ |
262 | bios(&bb);␊ |
263 | }␊ |
264 | ␊ |
265 | int biosread(int dev, int cyl, int head, int sec, int num)␊ |
266 | {␊ |
267 | int i;␊ |
268 | ␊ |
269 | bb.intno = 0x13;␊ |
270 | sec += 1; /* sector numbers start at 1 */␊ |
271 | ␊ |
272 | for (i=0;;) {␊ |
273 | bb.ecx.r.h = cyl;␊ |
274 | bb.ecx.r.l = ((cyl & 0x300) >> 2) | (sec & 0x3F);␊ |
275 | bb.edx.r.h = head;␊ |
276 | bb.edx.r.l = dev;␊ |
277 | bb.eax.r.l = num;␊ |
278 | bb.ebx.rr = OFFSET(ptov(BIOS_ADDR));␊ |
279 | bb.es = SEGMENT(ptov(BIOS_ADDR));␊ |
280 | ␊ |
281 | bb.eax.r.h = 0x02;␊ |
282 | bios(&bb);␊ |
283 | ␊ |
284 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
285 | if (bb.flags.cf == 0)␊ |
286 | bb.eax.r.h = 0;␊ |
287 | ␊ |
288 | /* Now we can really check for the return code (AH) value. */␊ |
289 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
290 | break;␊ |
291 | ␊ |
292 | /* reset disk subsystem and try again */␊ |
293 | bb.eax.r.h = 0x00;␊ |
294 | bios(&bb);␊ |
295 | }␊ |
296 | return bb.eax.r.h;␊ |
297 | }␊ |
298 | ␊ |
299 | int ebiosread(int dev, unsigned long long sec, int count)␊ |
300 | {␊ |
301 | int i;␊ |
302 | static struct {␊ |
303 | unsigned char size;␊ |
304 | unsigned char reserved;␊ |
305 | unsigned char numblocks;␊ |
306 | unsigned char reserved2;␊ |
307 | unsigned short bufferOffset;␊ |
308 | unsigned short bufferSegment;␊ |
309 | unsigned long long startblock;␊ |
310 | } addrpacket __attribute__((aligned(16))) = {0};␊ |
311 | addrpacket.size = sizeof(addrpacket);␊ |
312 | ␊ |
313 | for (i=0;;) {␊ |
314 | bb.intno = 0x13;␊ |
315 | bb.eax.r.h = 0x42;␊ |
316 | bb.edx.r.l = dev;␊ |
317 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
318 | bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
319 | addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
320 | addrpacket.numblocks = count;␊ |
321 | addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
322 | addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
323 | addrpacket.startblock = sec;␊ |
324 | bios(&bb);␊ |
325 | ␊ |
326 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
327 | if (bb.flags.cf == 0)␊ |
328 | bb.eax.r.h = 0;␊ |
329 | ␊ |
330 | /* Now we can really check for the return code (AH) value. */␊ |
331 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
332 | break;␊ |
333 | ␊ |
334 | /* reset disk subsystem and try again */␊ |
335 | bb.eax.r.h = 0x00;␊ |
336 | bios(&bb);␊ |
337 | }␊ |
338 | return bb.eax.r.h;␊ |
339 | }␊ |
340 | ␊ |
341 | int ebioswrite(int dev, long sec, int count)␊ |
342 | {␊ |
343 | int i;␊ |
344 | static struct {␊ |
345 | unsigned char size;␊ |
346 | unsigned char reserved;␊ |
347 | unsigned char numblocks;␊ |
348 | unsigned char reserved2;␊ |
349 | unsigned short bufferOffset;␊ |
350 | unsigned short bufferSegment;␊ |
351 | unsigned long long startblock;␊ |
352 | } addrpacket __attribute__((aligned(16))) = {0};␊ |
353 | addrpacket.size = sizeof(addrpacket);␊ |
354 | ␊ |
355 | for (i=0;;) {␊ |
356 | bb.intno = 0x13;␊ |
357 | bb.eax.r.l = 0; /* Don't verify */␊ |
358 | bb.eax.r.h = 0x43;␊ |
359 | bb.edx.r.l = dev;␊ |
360 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
361 | bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
362 | addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
363 | addrpacket.numblocks = count;␊ |
364 | addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
365 | addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
366 | addrpacket.startblock = sec;␊ |
367 | bios(&bb);␊ |
368 | ␊ |
369 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
370 | if (bb.flags.cf == 0)␊ |
371 | bb.eax.r.h = 0;␊ |
372 | ␊ |
373 | /* Now we can really check for the return code (AH) value. */␊ |
374 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
375 | break;␊ |
376 | ␊ |
377 | /* reset disk subsystem and try again */␊ |
378 | bb.eax.r.h = 0x00;␊ |
379 | bios(&bb);␊ |
380 | }␊ |
381 | return bb.eax.r.h;␊ |
382 | }␊ |
383 | ␊ |
384 | void putc(int ch)␊ |
385 | {␊ |
386 | bb.intno = 0x10;␊ |
387 | bb.ebx.r.h = 0x00; /* background black */␊ |
388 | bb.ebx.r.l = 0x0F; /* foreground white */␊ |
389 | bb.eax.r.h = 0x0e;␊ |
390 | bb.eax.r.l = ch;␊ |
391 | bios(&bb);␊ |
392 | }␊ |
393 | ␊ |
394 | void putca(int ch, int attr, int repeat)␊ |
395 | {␊ |
396 | bb.intno = 0x10;␊ |
397 | bb.ebx.r.h = 0x00; /* page number */␊ |
398 | bb.ebx.r.l = attr; /* attribute */␊ |
399 | bb.eax.r.h = 0x9;␊ |
400 | bb.eax.r.l = ch;␊ |
401 | bb.ecx.rx = repeat; /* repeat count */ ␊ |
402 | bios(&bb);␊ |
403 | }␊ |
404 | ␊ |
405 | /* Check to see if the passed-in drive is in El Torito no-emulation mode. */␊ |
406 | int is_no_emulation(int drive)␊ |
407 | {␊ |
408 | struct packet {␊ |
409 | ␉unsigned char packet_size;␊ |
410 | ␉unsigned char media_type;␊ |
411 | ␉unsigned char drive_num;␊ |
412 | ␉unsigned char ctrlr_index;␊ |
413 | ␉unsigned long lba;␊ |
414 | ␉unsigned short device_spec;␊ |
415 | ␉unsigned short buffer_segment;␊ |
416 | ␉unsigned short load_segment;␊ |
417 | ␉unsigned short sector_count;␊ |
418 | ␉unsigned char cyl_count;␊ |
419 | ␉unsigned char sec_count;␊ |
420 | ␉unsigned char head_count;␊ |
421 | ␉unsigned char reseved;␊ |
422 | } __attribute__((packed));␊ |
423 | static struct packet pkt;␊ |
424 | ␊ |
425 | bzero(&pkt, sizeof(pkt));␊ |
426 | pkt.packet_size = 0x13;␊ |
427 | ␊ |
428 | bb.intno = 0x13;␊ |
429 | bb.eax.r.h = 0x4b;␊ |
430 | bb.eax.r.l = 0x01; // subfunc: get info␊ |
431 | bb.edx.r.l = drive;␊ |
432 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&pkt);␊ |
433 | bb.ds = NORMALIZED_SEGMENT((unsigned)&pkt);␊ |
434 | ␊ |
435 | bios(&bb);␊ |
436 | #if DEBUG␊ |
437 | printf("el_torito info drive %x\n", drive);␊ |
438 | ␊ |
439 | printf("--> cf %x, eax %x\n", bb.flags.cf, bb.eax.rr);␊ |
440 | ␊ |
441 | printf("pkt_size: %x\n", pkt.packet_size);␊ |
442 | printf("media_type: %x\n", pkt.media_type);␊ |
443 | printf("drive_num: %x\n", pkt.drive_num);␊ |
444 | printf("device_spec: %x\n", pkt.device_spec);␊ |
445 | printf("press a key->\n");getc();␊ |
446 | #endif␊ |
447 | ␊ |
448 | /* Some BIOSes erroneously return cf = 1 */␊ |
449 | /* Just check to see if the drive number is the same. */␊ |
450 | if (pkt.drive_num == drive) {␊ |
451 | ␉if ((pkt.media_type & 0x0F) == 0) {␊ |
452 | ␉ /* We are in no-emulation mode. */␊ |
453 | ␉ return 1;␊ |
454 | ␉}␊ |
455 | }␊ |
456 | ␊ |
457 | return 0;␊ |
458 | }␊ |
459 | ␊ |
460 | #if DEBUG␊ |
461 | /*␊ |
462 | * BIOS drive information.␊ |
463 | */␊ |
464 | void print_drive_info(boot_drive_info_t *dp)␊ |
465 | {␊ |
466 | // printf("buf_size = %x\n", dp->params.buf_size);␊ |
467 | printf("info_flags = %x\n", dp->params.info_flags);␊ |
468 | printf(" phys_cyls = %lx\n", dp->params. phys_cyls);␊ |
469 | printf(" phys_heads = %lx\n", dp->params. phys_heads);␊ |
470 | printf(" phys_spt = %lx\n", dp->params. phys_spt);␊ |
471 | printf("phys_sectors = %lx%lx\n", ((unsigned long *)(&dp->params.phys_sectors))[1],␊ |
472 | ␉␉␉␉ ((unsigned long *)(&dp->params.phys_sectors))[0]);␊ |
473 | printf("phys_nbps = %x\n", dp->params.phys_nbps);␊ |
474 | // printf("dpte_offset = %x\n", dp->params.dpte_offset);␊ |
475 | // printf("dpte_segment = %x\n", dp->params.dpte_segment);␊ |
476 | // printf("key = %x\n", dp->params.key);␊ |
477 | // printf("path_len = %x\n", dp->params. path_len);␊ |
478 | // printf("reserved1 = %x\n", dp->params. reserved1);␊ |
479 | // printf("reserved2 = %x\n", dp->params.reserved2);␊ |
480 | //printf("bus_type[4] = %x\n", dp->params. bus_type[4]);␊ |
481 | //printf("interface_type[8] = %x\n", dp->params. interface_type[8]);␊ |
482 | //printf("interface_path[8] = %x\n", dp->params. interface_path[8]);␊ |
483 | //printf("dev_path[8] = %x\n", dp->params. dev_path[8]);␊ |
484 | // printf("reserved3 = %x\n", dp->params. reserved3);␊ |
485 | // printf("checksum = %x\n", dp->params. checksum);␊ |
486 | ␊ |
487 | printf(" io_port_base = %x\n", dp->dpte.io_port_base);␊ |
488 | printf(" control_port_base = %x\n", dp->dpte.control_port_base);␊ |
489 | printf(" head_flags = %x\n", dp->dpte. head_flags);␊ |
490 | printf(" vendor_info = %x\n", dp->dpte. vendor_info);␊ |
491 | printf(" irq = %x\n", dp->dpte. irq);␊ |
492 | // printf(" irq_unused = %x\n", dp->dpte. irq_unused);␊ |
493 | printf(" block_count = %x\n", dp->dpte. block_count);␊ |
494 | printf(" dma_channe = %x\n", dp->dpte. dma_channel);␊ |
495 | printf(" dma_type = %x\n", dp->dpte. dma_type);␊ |
496 | printf(" pio_type = %x\n", dp->dpte. pio_type);␊ |
497 | printf(" pio_unused = %x\n", dp->dpte. pio_unused);␊ |
498 | printf(" option_flags = %x\n", dp->dpte.option_flags);␊ |
499 | // printf(" reserved = %x\n", dp->dpte.reserved);␊ |
500 | printf(" revision = %x\n", dp->dpte. revision);␊ |
501 | // printf(" checksum = %x\n", dp->dpte. checksum);␊ |
502 | }␊ |
503 | ␊ |
504 | #endif␊ |
505 | ␊ |
506 | int get_drive_info(int drive, struct driveInfo *dp)␊ |
507 | {␊ |
508 | boot_drive_info_t *di = &dp->di;␊ |
509 | int ret = 0;␊ |
510 | ␊ |
511 | #if UNUSED␊ |
512 | if (maxhd == 0) {␊ |
513 | bb.intno = 0x13;␊ |
514 | bb.eax.r.h = 0x08;␊ |
515 | bb.edx.r.l = 0x80;␊ |
516 | bios(&bb);␊ |
517 | if (bb.flags.cf == 0)␊ |
518 | maxhd = 0x7f + bb.edx.r.l;␊ |
519 | };␊ |
520 | ␊ |
521 | if (drive > maxhd)␊ |
522 | return 0;␊ |
523 | #endif␊ |
524 | ␊ |
525 | bzero(dp, sizeof(struct driveInfo));␊ |
526 | dp->biosdev = drive;␊ |
527 | ␊ |
528 | /* Check for El Torito no-emulation mode. */␊ |
529 | dp->no_emulation = is_no_emulation(drive);␊ |
530 | ␊ |
531 | /* Check drive for EBIOS support. */␊ |
532 | bb.intno = 0x13;␊ |
533 | bb.eax.r.h = 0x41;␊ |
534 | bb.edx.r.l = drive;␊ |
535 | bb.ebx.rr = 0x55aa;␊ |
536 | bios(&bb);␊ |
537 | if((bb.ebx.rr == 0xaa55) && (bb.flags.cf == 0)) {␊ |
538 | /* Get flags for supported operations. */␊ |
539 | dp->uses_ebios = bb.ecx.r.l;␊ |
540 | }␊ |
541 | ␊ |
542 | if (dp->uses_ebios & (EBIOS_ENHANCED_DRIVE_INFO | EBIOS_LOCKING_ACCESS | EBIOS_FIXED_DISK_ACCESS)) {␊ |
543 | /* Get EBIOS drive info. */␊ |
544 | ␉static struct drive_params params;␊ |
545 | ␊ |
546 | params.buf_size = sizeof(params);␊ |
547 | bb.intno = 0x13;␊ |
548 | bb.eax.r.h = 0x48;␊ |
549 | bb.edx.r.l = drive;␊ |
550 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)¶ms);␊ |
551 | bb.ds = NORMALIZED_SEGMENT((unsigned)¶ms);␊ |
552 | bios(&bb);␊ |
553 | if(bb.flags.cf != 0 /* || params.phys_sectors < 2097152 */) {␊ |
554 | dp->uses_ebios = 0;␊ |
555 | ␉ di->params.buf_size = 1;␊ |
556 | } else {␊ |
557 | ␉ bcopy(¶ms, &di->params, sizeof(params));␊ |
558 | ␊ |
559 | ␉ if (drive >= BASE_HD_DRIVE &&␊ |
560 | ␉␉ (dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) &&␊ |
561 | ␉␉ di->params.buf_size >= 30 &&␊ |
562 | ␉␉ !(di->params.dpte_offset == 0xFFFF && di->params.dpte_segment == 0xFFFF)) {␊ |
563 | ␉␉void *ptr = (void *)(di->params.dpte_offset + ((unsigned int)di->params.dpte_segment << 4));␊ |
564 | ␉␉bcopy(ptr, &di->dpte, sizeof(di->dpte));␊ |
565 | ␉ }␊ |
566 | ␉}␊ |
567 | }␊ |
568 | ␊ |
569 | /*␊ |
570 | * zef: This code will fail on recent JMicron and Intel option ROMs␊ |
571 | */ ␊ |
572 | // if (di->params.phys_heads == 0 || di->params.phys_spt == 0) {␊ |
573 | //␉/* Either it's not EBIOS, or EBIOS didn't tell us. */␊ |
574 | //␉bb.intno = 0x13;␊ |
575 | //␉bb.eax.r.h = 0x08;␊ |
576 | //␉bb.edx.r.l = drive;␊ |
577 | //␉bios(&bb);␊ |
578 | //␉if (bb.flags.cf == 0 && bb.eax.r.h == 0) {␊ |
579 | //␉ unsigned long cyl;␊ |
580 | //␉ unsigned long sec;␊ |
581 | //␉ unsigned long hds;␊ |
582 | //␊ |
583 | //␉ hds = bb.edx.r.h;␊ |
584 | //␉ sec = bb.ecx.r.l & 0x3F;␊ |
585 | //␉ if((dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) && (sec != 0)) {␊ |
586 | //␉␉cyl = (di->params.phys_sectors / ((hds + 1) * sec)) - 1;␊ |
587 | //␉ }␊ |
588 | //␉ else {␊ |
589 | //␉␉cyl = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
590 | //␉ }␊ |
591 | //␉ di->params.phys_heads = hds; ␊ |
592 | //␉ di->params.phys_spt = sec;␊ |
593 | //␉ di->params.phys_cyls = cyl;␊ |
594 | //␉} else {␊ |
595 | //␉ ret = -1;␊ |
596 | //␉}␊ |
597 | // }␊ |
598 | ␊ |
599 | if (dp->no_emulation) {␊ |
600 | /* Some BIOSes give us erroneous EBIOS support information.␊ |
601 | ␉ * Assume that if you're on a CD, then you can use␊ |
602 | ␉ * EBIOS disk calls.␊ |
603 | ␉ */␊ |
604 | dp->uses_ebios |= EBIOS_FIXED_DISK_ACCESS;␊ |
605 | }␊ |
606 | #if DEBUG␊ |
607 | print_drive_info(di);␊ |
608 | printf("uses_ebios = 0x%x\n", dp->uses_ebios);␊ |
609 | printf("result %d\n", ret);␊ |
610 | printf("press a key->\n");getc();␊ |
611 | #endif␊ |
612 | ␊ |
613 | if (ret == 0) {␊ |
614 | ␉ dp->valid = 1;␊ |
615 | }␊ |
616 | return ret;␊ |
617 | }␊ |
618 | ␊ |
619 | int ebiosEjectMedia(int biosdev)␊ |
620 | {␊ |
621 | bb.intno = 0x13;␊ |
622 | bb.eax.r.h = 0x46;␊ |
623 | bb.eax.r.l = 0;␊ |
624 | bb.edx.rx = biosdev;␊ |
625 | bios(&bb);␊ |
626 | return bb.eax.r.h;␊ |
627 | }␊ |
628 | ␊ |
629 | void setCursorPosition(int x, int y, int page)␊ |
630 | {␊ |
631 | bb.intno = 0x10;␊ |
632 | bb.eax.r.h = 0x02;␊ |
633 | bb.ebx.r.h = page; /* page 0 for graphics */␊ |
634 | bb.edx.r.l = x;␊ |
635 | bb.edx.r.h = y;␊ |
636 | bios(&bb);␊ |
637 | }␊ |
638 | ␊ |
639 | void setCursorType(int type)␊ |
640 | {␊ |
641 | bb.intno = 0x10;␊ |
642 | bb.eax.r.h = 0x01;␊ |
643 | bb.ecx.rr = type;␊ |
644 | bios(&bb);␊ |
645 | }␊ |
646 | ␊ |
647 | void getCursorPositionAndType(int * x, int * y, int * type)␊ |
648 | {␊ |
649 | bb.intno = 0x10;␊ |
650 | bb.eax.r.h = 0x03;␊ |
651 | bios(&bb);␊ |
652 | *x = bb.edx.r.l;␊ |
653 | *y = bb.edx.r.h;␊ |
654 | *type = bb.ecx.rr;␊ |
655 | }␊ |
656 | ␊ |
657 | void scollPage(int x1, int y1, int x2, int y2, int attr, int rows, int dir)␊ |
658 | {␊ |
659 | bb.intno = 0x10;␊ |
660 | bb.eax.r.h = (dir > 0) ? 0x06 : 0x07;␊ |
661 | bb.eax.r.l = rows;␊ |
662 | bb.ebx.r.h = attr;␊ |
663 | bb.ecx.r.h = y1;␊ |
664 | bb.ecx.r.l = x1;␊ |
665 | bb.edx.r.h = y2;␊ |
666 | bb.edx.r.l = x2;␊ |
667 | bios(&bb);␊ |
668 | }␊ |
669 | ␊ |
670 | void clearScreenRows( int y1, int y2 )␊ |
671 | {␊ |
672 | scollPage( 0, y1, 80 - 1, y2, 0x07, y2 - y1 + 1, 1 );␊ |
673 | }␊ |
674 | ␊ |
675 | void setActiveDisplayPage( int page )␊ |
676 | {␊ |
677 | bb.intno = 0x10;␊ |
678 | bb.eax.r.h = 5;␊ |
679 | bb.eax.r.l = page;␊ |
680 | bios(&bb);␊ |
681 | }␊ |
682 | ␊ |
683 | #if DEBUG␊ |
684 | ␊ |
685 | int terminateDiskEmulation()␊ |
686 | {␊ |
687 | static char cd_spec[0x13];␊ |
688 | ␊ |
689 | bb.intno = 0x13;␊ |
690 | bb.eax.r.h = 0x4b;␊ |
691 | bb.eax.r.l = 0; // subfunc: terminate emulation ␊ |
692 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&cd_spec);␊ |
693 | bb.ds = NORMALIZED_SEGMENT((unsigned)&cd_spec);␊ |
694 | bios(&bb);␊ |
695 | return bb.eax.r.h;␊ |
696 | }␊ |
697 | ␊ |
698 | int readDriveParameters(int drive, struct driveParameters *dp)␊ |
699 | {␊ |
700 | bb.intno = 0x13;␊ |
701 | bb.edx.r.l = drive;␊ |
702 | bb.eax.r.h = 0x08;␊ |
703 | bios(&bb);␊ |
704 | if (bb.eax.r.h == 0) {␊ |
705 | dp->heads = bb.edx.r.h;␊ |
706 | dp->sectors = bb.ecx.r.l & 0x3F;␊ |
707 | dp->cylinders = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
708 | dp->totalDrives = bb.edx.r.l;␊ |
709 | } else {␊ |
710 | bzero(dp, sizeof(*dp));␊ |
711 | }␊ |
712 | return bb.eax.r.h;␊ |
713 | ␊ |
714 | }␊ |
715 | #endif␊ |
716 | ␊ |
717 | #ifdef APM_SUPPORT␊ |
718 | ␊ |
719 | #define APM_INTNO 0x15␊ |
720 | #define APM_INTCODE 0x53␊ |
721 | ␊ |
722 | int␊ |
723 | APMPresent(void)␊ |
724 | {␊ |
725 | bb.intno = APM_INTNO;␊ |
726 | bb.eax.r.h = APM_INTCODE;␊ |
727 | bb.eax.r.l = 0x00;␊ |
728 | bb.ebx.rr = 0x0000;␊ |
729 | bios(&bb);␊ |
730 | if ((bb.flags.cf == 0) &&␊ |
731 | (bb.ebx.r.h == 'P') &&␊ |
732 | (bb.ebx.r.l == 'M')) {␊ |
733 | /* Success */␊ |
734 | bootArgs->apmConfig.major_vers = bb.eax.r.h;␊ |
735 | bootArgs->apmConfig.minor_vers = bb.eax.r.l;␊ |
736 | bootArgs->apmConfig.flags.data = bb.ecx.rr;␊ |
737 | return 1;␊ |
738 | }␊ |
739 | return 0;␊ |
740 | }␊ |
741 | ␊ |
742 | int␊ |
743 | APMConnect32(void)␊ |
744 | {␊ |
745 | bb.intno = APM_INTNO;␊ |
746 | bb.eax.r.h = APM_INTCODE;␊ |
747 | bb.eax.r.l = 0x03;␊ |
748 | bb.ebx.rr = 0x0000;␊ |
749 | bios(&bb);␊ |
750 | if (bb.flags.cf == 0) {␊ |
751 | /* Success */␊ |
752 | bootArgs->apmConfig.cs32_base = (bb.eax.rr) << 4;␊ |
753 | bootArgs->apmConfig.entry_offset = bb.ebx.rx;␊ |
754 | bootArgs->apmConfig.cs16_base = (bb.ecx.rr) << 4;␊ |
755 | bootArgs->apmConfig.ds_base = (bb.edx.rr) << 4;␊ |
756 | if (bootArgs->apmConfig.major_vers >= 1 &&␊ |
757 | bootArgs->apmConfig.minor_vers >= 1) {␊ |
758 | bootArgs->apmConfig.cs_length = bb.esi.rr;␊ |
759 | bootArgs->apmConfig.ds_length = bb.edi.rr;␊ |
760 | } else {␊ |
761 | bootArgs->apmConfig.cs_length = ␊ |
762 | bootArgs->apmConfig.ds_length = 64 * 1024;␊ |
763 | }␊ |
764 | bootArgs->apmConfig.connected = 1;␊ |
765 | return 1;␊ |
766 | }␊ |
767 | return 0;␊ |
768 | }␊ |
769 | ␊ |
770 | #endif /* APM_SUPPORT */␊ |
771 | ␊ |
772 | #ifdef EISA_SUPPORT␊ |
773 | bool␊ |
774 | eisa_present(␊ |
775 | void␊ |
776 | )␊ |
777 | {␊ |
778 | static bool checked;␊ |
779 | static bool isEISA;␊ |
780 | ␊ |
781 | if (!checked) {␊ |
782 | if (strncmp((char *)0xfffd9, "EISA", 4) == 0)␊ |
783 | isEISA = TRUE;␊ |
784 | ␊ |
785 | checked = TRUE;␊ |
786 | }␊ |
787 | ␊ |
788 | return (isEISA);␊ |
789 | }␊ |
790 | ␊ |
791 | int␊ |
792 | ReadEISASlotInfo(EISA_slot_info_t *ep, int slot)␊ |
793 | {␊ |
794 | union {␊ |
795 | struct {␊ |
796 | unsigned char char2h :2;␊ |
797 | unsigned char char1 :5;␊ |
798 | unsigned char char3 :5;␊ |
799 | unsigned char char2l :3;␊ |
800 | unsigned char d2 :4;␊ |
801 | unsigned char d1 :4;␊ |
802 | unsigned char d4 :4;␊ |
803 | unsigned char d3 :4;␊ |
804 | } s;␊ |
805 | unsigned char data[4];␊ |
806 | } u;␊ |
807 | static char hex[0x10] = "0123456789ABCDEF";␊ |
808 | ␊ |
809 | ␊ |
810 | bb.intno = 0x15;␊ |
811 | bb.eax.r.h = 0xd8;␊ |
812 | bb.eax.r.l = 0x00;␊ |
813 | bb.ecx.r.l = slot;␊ |
814 | bios(&bb);␊ |
815 | if (bb.flags.cf)␊ |
816 | return bb.eax.r.h;␊ |
817 | ep->u_ID.d = bb.eax.r.l;␊ |
818 | ep->configMajor = bb.ebx.r.h;␊ |
819 | ep->configMinor = bb.ebx.r.l;␊ |
820 | ep->checksum = bb.ecx.rr;␊ |
821 | ep->numFunctions = bb.edx.r.h;␊ |
822 | ep->u_resources.d = bb.edx.r.l;␊ |
823 | u.data[0] = bb.edi.r.l;␊ |
824 | u.data[1] = bb.edi.r.h;␊ |
825 | u.data[2] = bb.esi.r.l;␊ |
826 | u.data[3] = bb.esi.r.h;␊ |
827 | ep->id[0] = u.s.char1 + ('A' - 1);␊ |
828 | ep->id[1] = (u.s.char2l | (u.s.char2h << 3)) + ('A' - 1);␊ |
829 | ep->id[2] = u.s.char3 + ('A' - 1);␊ |
830 | ep->id[3] = hex[u.s.d1];␊ |
831 | ep->id[4] = hex[u.s.d2];␊ |
832 | ep->id[5] = hex[u.s.d3];␊ |
833 | ep->id[6] = hex[u.s.d4];␊ |
834 | ep->id[7] = 0;␊ |
835 | return 0;␊ |
836 | }␊ |
837 | ␊ |
838 | /*␊ |
839 | * Note: ep must point to an address below 64k.␊ |
840 | */␊ |
841 | ␊ |
842 | int␊ |
843 | ReadEISAFuncInfo(EISA_func_info_t *ep, int slot, int function)␊ |
844 | {␊ |
845 | bb.intno = 0x15;␊ |
846 | bb.eax.r.h = 0xd8;␊ |
847 | bb.eax.r.l = 0x01;␊ |
848 | bb.ecx.r.l = slot;␊ |
849 | bb.ecx.r.h = function;␊ |
850 | bb.esi.rr = (unsigned int)ep->data;␊ |
851 | bios(&bb);␊ |
852 | if (bb.eax.r.h == 0) {␊ |
853 | ep->slot = slot;␊ |
854 | ep->function = function;␊ |
855 | }␊ |
856 | return bb.eax.r.h;␊ |
857 | }␊ |
858 | #endif /* EISA_SUPPORT */␊ |
859 | ␊ |
860 | #define PCI_SIGNATURE 0x20494350 /* "PCI " */␊ |
861 | ␊ |
862 | int␊ |
863 | ReadPCIBusInfo(PCI_bus_info_t *pp)␊ |
864 | {␊ |
865 | bb.intno = 0x1a;␊ |
866 | bb.eax.r.h = 0xb1;␊ |
867 | bb.eax.r.l = 0x01;␊ |
868 | bios(&bb);␊ |
869 | if ((bb.eax.r.h == 0) && (bb.edx.rx == PCI_SIGNATURE)) {␊ |
870 | pp->BIOSPresent = 1;␊ |
871 | pp->u_bus.d = bb.eax.r.l;␊ |
872 | pp->majorVersion = bb.ebx.r.h;␊ |
873 | pp->minorVersion = bb.ebx.r.l;␊ |
874 | pp->maxBusNum = bb.ecx.r.l;␊ |
875 | return 0;␊ |
876 | }␊ |
877 | return -1;␊ |
878 | }␊ |
879 | ␊ |
880 | void sleep(int n)␊ |
881 | {␊ |
882 | unsigned int endtime = (time18() + 18*n);␊ |
883 | while (time18() < endtime);␊ |
884 | }␊ |
885 | ␊ |
886 | void delay(int ms)␊ |
887 | {␊ |
888 | bb.intno = 0x15;␊ |
889 | bb.eax.r.h = 0x86;␊ |
890 | bb.ecx.rr = ms >> 16;␊ |
891 | bb.edx.rr = ms & 0xFFFF;␊ |
892 | bios(&bb);␊ |
893 | }␊ |
894 | ␊ |
895 | |