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Source at commit 1075 created 13 years 1 month ago. By meklort, Disk code | |
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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 | ␊ |
43 | #include "libsaio.h"␊ |
44 | ␊ |
45 | ␊ |
46 | #define MAX_DRIVES 8␊ |
47 | ␊ |
48 | static biosBuf_t bb;␊ |
49 | ␊ |
50 | int bgetc(void)␊ |
51 | {␊ |
52 | /* Poll for the next character. Most real BIOS do not need this as the␊ |
53 | INT 16h,AH=0h function will block until one is received.␊ |
54 | Unfortunately, Apple's EFI CSM will never wake up. This idea is lifted␊ |
55 | from the grub-a20.patch to GRUB's stage2/asm.S file.␊ |
56 | */␊ |
57 | while(!readKeyboardStatus())␊ |
58 | ;␊ |
59 | bb.intno = 0x16;␊ |
60 | bb.eax.r.h = 0x00;␊ |
61 | bios(&bb);␊ |
62 | return bb.eax.rr;␊ |
63 | }␊ |
64 | ␊ |
65 | int readKeyboardStatus(void)␊ |
66 | {␊ |
67 | bb.intno = 0x16;␊ |
68 | bb.eax.r.h = 0x01;␊ |
69 | bios(&bb);␊ |
70 | if (bb.flags.zf) {␊ |
71 | return 0;␊ |
72 | } else {␊ |
73 | return bb.eax.rr;␊ |
74 | }␊ |
75 | }␊ |
76 | ␊ |
77 | int readKeyboardShiftFlags(void)␊ |
78 | {␊ |
79 | bb.intno = 0x16;␊ |
80 | bb.eax.r.h = 0x02;␊ |
81 | bios(&bb);␊ |
82 | return bb.eax.r.l;␊ |
83 | }␊ |
84 | ␊ |
85 | unsigned int time18(void)␊ |
86 | {␊ |
87 | union {␊ |
88 | struct {␊ |
89 | unsigned int low:16;␊ |
90 | unsigned int high:16;␊ |
91 | } s;␊ |
92 | unsigned int i;␊ |
93 | } time;␊ |
94 | ␊ |
95 | bb.intno = 0x1a;␊ |
96 | bb.eax.r.h = 0x00;␊ |
97 | bios(&bb);␊ |
98 | time.s.low = bb.edx.rr;␊ |
99 | time.s.high = bb.ecx.rr;␊ |
100 | return time.i;␊ |
101 | }␊ |
102 | ␊ |
103 | #if 0␊ |
104 | static unsigned long rerangeMemoryMap(unsigned long count)␊ |
105 | {␊ |
106 | ␉int i, still_changing, newcount = count;␊ |
107 | ␊ |
108 | ␉MemoryRange * range = (MemoryRange *)BIOS_ADDR;␊ |
109 | ␉struct MemoryRange change_tmp;␊ |
110 | ␊ |
111 | ␉/* sort map list by memory addresses (low -> high) */␊ |
112 | ␉still_changing = 1;␊ |
113 | ␉while (still_changing) {␊ |
114 | ␉␉still_changing = 0;␊ |
115 | ␉␉for (i=1; i<count; i++) {␊ |
116 | ␉␉␉/* if <current_addr> > <last_addr>, swap */␊ |
117 | ␉␉␉if (range[i].base < range[i-1].base) {␊ |
118 | ␉␉␉␉change_tmp.base = range[i].base;␊ |
119 | ␉␉␉␉change_tmp.length = range[i].length;␊ |
120 | ␉␉␉␉change_tmp.type = range[i].type;␊ |
121 | ␊ |
122 | ␉␉␉␉range[i].base = range[i-1].base;␊ |
123 | ␉␉␉␉range[i].length = range[i-1].length;␊ |
124 | ␉␉␉␉range[i].type = range[i-1].type;␊ |
125 | ␊ |
126 | ␉␉␉␉range[i-1].base = change_tmp.base;␊ |
127 | ␉␉␉␉range[i-1].length = change_tmp.length;␊ |
128 | ␉␉␉␉range[i-1].type = change_tmp.type;␊ |
129 | ␊ |
130 | ␉␉␉␉still_changing=1;␊ |
131 | ␉␉␉}␊ |
132 | ␉␉}␊ |
133 | ␉}␊ |
134 | ␊ |
135 | ␉/* clear overlaps */␊ |
136 | ␉/* linux's arch/i386/kern/setup.c may have better algorithm */␊ |
137 | ␉for (i=1; i<count; i++) {␊ |
138 | ␉␉if ( range[i-1].base + range[i-1].length > range[i].base ) {␊ |
139 | ␉␉␉range[newcount].base = range[i].base + range[i].length;␊ |
140 | ␉␉␉range[newcount].length = range[i-1].base + range[i-1].length - range[newcount].base;␊ |
141 | ␉␉␉range[newcount].type = range[i-1].type;␊ |
142 | ␉␉␉newcount++;␊ |
143 | ␊ |
144 | ␉␉␉range[i-1].length = range[i].base - range[i-1].base;␊ |
145 | ␉␉}␊ |
146 | ␉}␊ |
147 | ␊ |
148 | ␉/*␊ |
149 | ␉ * 0xb0000000 : 0x10000000 NG␊ |
150 | ␉ * 0xc0000400 NG␊ |
151 | ␉ * 0xf2000000 NG␊ |
152 | ␉ */␊ |
153 | ␉range[newcount].base = 0xb0000000;␊ |
154 | ␉range[newcount].length = 0x0f000000;␊ |
155 | ␉range[newcount].type = kMemoryRangeUsable;␊ |
156 | ␉newcount++;␊ |
157 | ␊ |
158 | ␉return newcount;␊ |
159 | }␊ |
160 | #endif␊ |
161 | ␊ |
162 | unsigned long getMemoryMap( MemoryRange * rangeArray,␊ |
163 | unsigned long maxRangeCount,␊ |
164 | unsigned long * conMemSizePtr,␊ |
165 | unsigned long * extMemSizePtr )␊ |
166 | {␊ |
167 | #define kMemoryMapSignature 'SMAP'␊ |
168 | #define kDescriptorSizeMin 20␊ |
169 | ␊ |
170 | MemoryRange *␉range = (MemoryRange *)BIOS_ADDR;␊ |
171 | unsigned long␉count = 0;␊ |
172 | // unsigned long␉rerangedCount;␊ |
173 | unsigned long long␉conMemSize = 0;␊ |
174 | unsigned long long␉extMemSize = 0;␊ |
175 | ␊ |
176 | // Prepare for the INT15 E820h call. Each call returns a single␊ |
177 | // memory range. A continuation value is returned that must be␊ |
178 | // provided on a subsequent call to fetch the next range.␊ |
179 | //␊ |
180 | // Certain BIOSes (Award 6.00PG) expect the upper word in EAX␊ |
181 | // to be cleared on entry, otherwise only a single range will␊ |
182 | // be reported.␊ |
183 | //␊ |
184 | // Some BIOSes will simply ignore the value of ECX on entry.␊ |
185 | // Probably best to keep its value at 20 to avoid surprises.␊ |
186 | ␊ |
187 | //printf("Get memory map 0x%x, %d\n", rangeArray); getchar();␊ |
188 | if (maxRangeCount > (BIOS_LEN / sizeof(MemoryRange))) {␊ |
189 | maxRangeCount = (BIOS_LEN / sizeof(MemoryRange));␊ |
190 | }␊ |
191 | bb.ebx.rx = 0; // Initial continuation value must be zero.␊ |
192 | ␊ |
193 | while ( count < maxRangeCount )␊ |
194 | {␊ |
195 | bb.intno = 0x15;␊ |
196 | bb.eax.rx = 0xe820;␊ |
197 | bb.ecx.rx = kDescriptorSizeMin;␊ |
198 | bb.edx.rx = kMemoryMapSignature;␊ |
199 | bb.edi.rr = NORMALIZED_OFFSET( (unsigned long) range );␊ |
200 | bb.es = NORMALIZED_SEGMENT( (unsigned long) range );␊ |
201 | bios(&bb);␊ |
202 | ␊ |
203 | // Check for errors.␊ |
204 | ␊ |
205 | if ( bb.flags.cf␊ |
206 | || bb.eax.rx != kMemoryMapSignature␊ |
207 | || bb.ecx.rx != kDescriptorSizeMin ) {␊ |
208 | //printf("Got an error %x %x %x\n", bb.flags.cf,␊ |
209 | // bb.eax.rx, bb.ecx.rx);␊ |
210 | break;␊ |
211 | }␊ |
212 | ␊ |
213 | // Tally up the conventional/extended memory sizes.␊ |
214 | ␊ |
215 | if ( range->type == kMemoryRangeUsable ||␊ |
216 | range->type == kMemoryRangeACPI ||␊ |
217 | range->type == kMemoryRangeNVS )␊ |
218 | {␊ |
219 | // Tally the conventional memory ranges.␊ |
220 | if ( range->base + range->length <= 0xa0000 ) {␊ |
221 | conMemSize += range->length;␊ |
222 | } ␊ |
223 | ␊ |
224 | // Record the top of extended memory.␊ |
225 | if ( range->base >= EXTENDED_ADDR ) {␊ |
226 | extMemSize += range->length;␊ |
227 | }␊ |
228 | }␊ |
229 | ␊ |
230 | range++;␊ |
231 | count++;␊ |
232 | ␊ |
233 | // Is this the last address range?␊ |
234 | ␊ |
235 | if ( bb.ebx.rx == 0 ) {␊ |
236 | //printf("last range\n");␊ |
237 | break;␊ |
238 | }␊ |
239 | }␊ |
240 | *conMemSizePtr = conMemSize / 1024; // size in KB␊ |
241 | *extMemSizePtr = extMemSize / 1024; // size in KB␊ |
242 | ␊ |
243 | #if 0␊ |
244 | rerangedCount = rerangeMemoryMap(count);␊ |
245 | range += rerangedCount - count;␊ |
246 | #endif␊ |
247 | ␊ |
248 | // Copy out data␊ |
249 | bcopy((char *)BIOS_ADDR, rangeArray, ((char *)range - (char *)BIOS_ADDR));␊ |
250 | ␊ |
251 | #if DEBUG␊ |
252 | {␊ |
253 | int i;␊ |
254 | printf("%d total ranges\n", count); getchar();␊ |
255 | for (i=0, range = rangeArray; i<count; i++, range++) {␊ |
256 | printf("range: type %d, base 0x%x, length 0x%x\n",␊ |
257 | range->type, (unsigned int)range->base, (unsigned int)range->length); getchar();␊ |
258 | }␊ |
259 | }␊ |
260 | #endif␊ |
261 | ␊ |
262 | return count;␊ |
263 | }␊ |
264 | ␊ |
265 | unsigned long getExtendedMemorySize()␊ |
266 | {␊ |
267 | // Get extended memory size for large configurations. Not used unless␊ |
268 | // the INT15, E820H call (Get System Address Map) failed.␊ |
269 | //␊ |
270 | // Input:␊ |
271 | //␊ |
272 | // AX Function Code E801h␊ |
273 | //␊ |
274 | // Outputs:␊ |
275 | //␊ |
276 | // CF Carry Flag Carry cleared indicates no error.␊ |
277 | // AX Extended 1 Number of contiguous KB between 1 and 16 MB,␊ |
278 | // maximum 0x3C00 = 15 MB.␊ |
279 | // BX Extended 2 Number of contiguous 64 KB blocks between␊ |
280 | // 16 MB and 4 GB.␊ |
281 | // CX Configured 1 Number of contiguous KB between 1 and 16 MB,␊ |
282 | // maximum 0x3C00 = 15 MB.␊ |
283 | // DX Configured 2 Number of contiguous 64 KB blocks between␊ |
284 | // 16 MB and 4 GB.␊ |
285 | ␊ |
286 | bb.intno = 0x15;␊ |
287 | bb.eax.rx = 0xe801;␊ |
288 | bios(&bb);␊ |
289 | ␊ |
290 | // Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
291 | ␊ |
292 | if ( bb.flags.cf == 0 ) return (bb.ebx.rr * 64 + bb.eax.rr);␊ |
293 | ␊ |
294 | // Get Extended memory size. Called on last resort since the return␊ |
295 | // value is limited to 16-bits (a little less than 64MB max). May␊ |
296 | // not be supported by modern BIOSes.␊ |
297 | //␊ |
298 | // Input:␊ |
299 | //␊ |
300 | // AX Function Code E801h␊ |
301 | //␊ |
302 | // Outputs:␊ |
303 | //␊ |
304 | // CF Carry Flag Carry cleared indicates no error.␊ |
305 | // AX Memory Count Number of contiguous KB above 1MB.␊ |
306 | ␊ |
307 | bb.intno = 0x15;␊ |
308 | bb.eax.rx = 0x88;␊ |
309 | bios(&bb);␊ |
310 | ␊ |
311 | // Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
312 | ␊ |
313 | return bb.flags.cf ? 0 : bb.eax.rr;␊ |
314 | }␊ |
315 | ␊ |
316 | unsigned long getConventionalMemorySize()␊ |
317 | {␊ |
318 | bb.intno = 0x12;␊ |
319 | bios(&bb);␊ |
320 | return bb.eax.rr; // kilobytes␊ |
321 | }␊ |
322 | ␊ |
323 | void video_mode(int mode)␊ |
324 | {␊ |
325 | bb.intno = 0x10;␊ |
326 | bb.eax.r.h = 0x00;␊ |
327 | bb.eax.r.l = mode;␊ |
328 | bios(&bb);␊ |
329 | }␊ |
330 | ␊ |
331 | int biosread(int dev, int cyl, int head, int sec, int num)␊ |
332 | {␊ |
333 | int i;␊ |
334 | ␊ |
335 | bb.intno = 0x13;␊ |
336 | sec += 1; /* sector numbers start at 1 */␊ |
337 | ␊ |
338 | for (i=0;;) {␊ |
339 | bb.ecx.r.h = cyl;␊ |
340 | bb.ecx.r.l = ((cyl & 0x300) >> 2) | (sec & 0x3F);␊ |
341 | bb.edx.r.h = head;␊ |
342 | bb.edx.r.l = dev;␊ |
343 | bb.eax.r.l = num;␊ |
344 | bb.ebx.rr = OFFSET(ptov(BIOS_ADDR));␊ |
345 | bb.es = SEGMENT(ptov(BIOS_ADDR));␊ |
346 | ␊ |
347 | bb.eax.r.h = 0x02;␊ |
348 | bios(&bb);␊ |
349 | ␊ |
350 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
351 | if (bb.flags.cf == 0)␊ |
352 | bb.eax.r.h = 0;␊ |
353 | ␊ |
354 | /* Now we can really check for the return code (AH) value. */␊ |
355 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
356 | break;␊ |
357 | ␊ |
358 | /* reset disk subsystem and try again */␊ |
359 | bb.eax.r.h = 0x00;␊ |
360 | bios(&bb);␊ |
361 | }␊ |
362 | return bb.eax.r.h;␊ |
363 | }␊ |
364 | ␊ |
365 | int ebiosread(int dev, unsigned long long sec, int count)␊ |
366 | {␊ |
367 | int i;␊ |
368 | static struct {␊ |
369 | unsigned char size;␊ |
370 | unsigned char reserved;␊ |
371 | unsigned char numblocks;␊ |
372 | unsigned char reserved2;␊ |
373 | unsigned short bufferOffset;␊ |
374 | unsigned short bufferSegment;␊ |
375 | unsigned long long startblock;␊ |
376 | } addrpacket __attribute__((aligned(16))) = {0};␊ |
377 | addrpacket.size = sizeof(addrpacket);␊ |
378 | ␊ |
379 | for (i=0;;) {␊ |
380 | bb.intno = 0x13;␊ |
381 | bb.eax.r.h = 0x42;␊ |
382 | bb.edx.r.l = dev;␊ |
383 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
384 | bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
385 | addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
386 | addrpacket.numblocks = count;␊ |
387 | addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
388 | addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
389 | addrpacket.startblock = sec;␊ |
390 | bios(&bb);␊ |
391 | ␊ |
392 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
393 | if (bb.flags.cf == 0)␊ |
394 | bb.eax.r.h = 0;␊ |
395 | ␊ |
396 | /* Now we can really check for the return code (AH) value. */␊ |
397 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
398 | break;␊ |
399 | ␊ |
400 | /* reset disk subsystem and try again */␊ |
401 | bb.eax.r.h = 0x00;␊ |
402 | bios(&bb);␊ |
403 | }␊ |
404 | return bb.eax.r.h;␊ |
405 | }␊ |
406 | ␊ |
407 | int ebioswrite(int dev, long sec, int count)␊ |
408 | {␊ |
409 | int i;␊ |
410 | static struct {␊ |
411 | unsigned char size;␊ |
412 | unsigned char reserved;␊ |
413 | unsigned char numblocks;␊ |
414 | unsigned char reserved2;␊ |
415 | unsigned short bufferOffset;␊ |
416 | unsigned short bufferSegment;␊ |
417 | unsigned long long startblock;␊ |
418 | } addrpacket __attribute__((aligned(16))) = {0};␊ |
419 | addrpacket.size = sizeof(addrpacket);␊ |
420 | ␊ |
421 | for (i=0;;) {␊ |
422 | bb.intno = 0x13;␊ |
423 | bb.eax.r.l = 0; /* Don't verify */␊ |
424 | bb.eax.r.h = 0x43;␊ |
425 | bb.edx.r.l = dev;␊ |
426 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
427 | bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
428 | addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
429 | addrpacket.numblocks = count;␊ |
430 | addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
431 | addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
432 | addrpacket.startblock = sec;␊ |
433 | bios(&bb);␊ |
434 | ␊ |
435 | /* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
436 | if (bb.flags.cf == 0)␊ |
437 | bb.eax.r.h = 0;␊ |
438 | ␊ |
439 | /* Now we can really check for the return code (AH) value. */␊ |
440 | if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
441 | break;␊ |
442 | ␊ |
443 | /* reset disk subsystem and try again */␊ |
444 | bb.eax.r.h = 0x00;␊ |
445 | bios(&bb);␊ |
446 | }␊ |
447 | return bb.eax.r.h;␊ |
448 | }␊ |
449 | ␊ |
450 | void bios_putchar(int ch)␊ |
451 | {␊ |
452 | bb.intno = 0x10;␊ |
453 | bb.ebx.r.h = 0x00; /* background black */␊ |
454 | bb.ebx.r.l = 0x0F; /* foreground white */␊ |
455 | bb.eax.r.h = 0x0e;␊ |
456 | bb.eax.r.l = ch;␊ |
457 | bios(&bb);␊ |
458 | }␊ |
459 | ␊ |
460 | void putca(int ch, int attr, int repeat)␊ |
461 | {␊ |
462 | bb.intno = 0x10;␊ |
463 | bb.ebx.r.h = 0x00; /* page number */␊ |
464 | bb.ebx.r.l = attr; /* attribute */␊ |
465 | bb.eax.r.h = 0x9;␊ |
466 | bb.eax.r.l = ch;␊ |
467 | bb.ecx.rx = repeat; /* repeat count */ ␊ |
468 | bios(&bb);␊ |
469 | }␊ |
470 | ␊ |
471 | /* Check to see if the passed-in drive is in El Torito no-emulation mode. */␊ |
472 | int is_no_emulation(int drive)␊ |
473 | {␊ |
474 | ␉struct packet {␊ |
475 | ␉␉unsigned char packet_size;␊ |
476 | ␉␉unsigned char media_type;␊ |
477 | ␉␉unsigned char drive_num;␊ |
478 | ␉␉unsigned char ctrlr_index;␊ |
479 | ␉␉unsigned long lba;␊ |
480 | ␉␉unsigned short device_spec;␊ |
481 | ␉␉unsigned short buffer_segment;␊ |
482 | ␉␉unsigned short load_segment;␊ |
483 | ␉␉unsigned short sector_count;␊ |
484 | ␉␉unsigned char cyl_count;␊ |
485 | ␉␉unsigned char sec_count;␊ |
486 | ␉␉unsigned char head_count;␊ |
487 | ␉␉unsigned char reseved;␊ |
488 | ␉} __attribute__((packed));␊ |
489 | ␉static struct packet pkt;␊ |
490 | ␉␊ |
491 | ␉bzero(&pkt, sizeof(pkt));␊ |
492 | ␉pkt.packet_size = 0x13;␊ |
493 | ␉␊ |
494 | ␉bb.intno␉␉= 0x13;␊ |
495 | ␉bb.eax.r.h␉␉= 0x4b;␊ |
496 | ␉bb.eax.r.l␉␉= 0x01; // subfunc: get info␊ |
497 | ␉bb.edx.r.l␉␉= drive;␊ |
498 | ␉bb.esi.rr␉␉= NORMALIZED_OFFSET((unsigned)&pkt);␊ |
499 | ␉bb.ds␉␉␉= NORMALIZED_SEGMENT((unsigned)&pkt);␊ |
500 | ␉␊ |
501 | ␉bios(&bb);␊ |
502 | #if DEBUG␊ |
503 | ␉printf("el_torito info drive %x\n", drive);␊ |
504 | ␉␊ |
505 | ␉printf("--> cf %x, eax %x\n", bb.flags.cf, bb.eax.rr);␊ |
506 | ␉␊ |
507 | ␉printf("pkt_size: %x\n", pkt.packet_size);␊ |
508 | ␉printf("media_type: %x\n", pkt.media_type);␊ |
509 | ␉printf("drive_num: %x\n", pkt.drive_num);␊ |
510 | ␉printf("device_spec: %x\n", pkt.device_spec);␊ |
511 | ␉pause();␊ |
512 | #endif␊ |
513 | ␉␊ |
514 | ␉/* Some BIOSes erroneously return cf = 1 */␊ |
515 | ␉/* Just check to see if the drive number is the same. */␊ |
516 | ␉if (pkt.drive_num == drive) {␊ |
517 | ␉␉if ((pkt.media_type & 0x0F) == 0) {␊ |
518 | ␉␉␉/* We are in no-emulation mode. */␊ |
519 | ␉␉␉return 1;␊ |
520 | ␉␉}␊ |
521 | ␉}␊ |
522 | ␉return 0;␊ |
523 | }␊ |
524 | ␊ |
525 | #if DEBUG␊ |
526 | /*␊ |
527 | * BIOS drive information.␊ |
528 | */␊ |
529 | void print_drive_info(boot_drive_info_t *dp)␊ |
530 | {␊ |
531 | //␉printf("buf_size = %x\n", dp->params.buf_size);␊ |
532 | ␉printf("info_flags = %x\n", dp->params.info_flags);␊ |
533 | ␉printf("phys_cyls = %lx\n", dp->params. phys_cyls);␊ |
534 | ␉printf("phys_heads = %lx\n", dp->params. phys_heads);␊ |
535 | ␉printf("phys_spt = %lx\n", dp->params. phys_spt);␊ |
536 | ␉printf("phys_sectors = %lx%lx\n", ((unsigned long *)(&dp->params.phys_sectors))[1],␊ |
537 | ␉␉ ((unsigned long *)(&dp->params.phys_sectors))[0]);␊ |
538 | ␉printf("phys_nbps = %x\n", dp->params.phys_nbps);␊ |
539 | //␉printf("dpte_offset = %x\n", dp->params.dpte_offset);␊ |
540 | //␉printf("dpte_segment = %x\n", dp->params.dpte_segment);␊ |
541 | //␉printf("key = %x\n", dp->params.key);␊ |
542 | //␉printf("path_len = %x\n", dp->params. path_len);␊ |
543 | //␉printf("reserved1 = %x\n", dp->params. reserved1);␊ |
544 | //␉printf("reserved2 = %x\n", dp->params.reserved2);␊ |
545 | //␉printf("bus_type[4] = %x\n", dp->params. bus_type[4]);␊ |
546 | //␉printf("interface_type[8] = %x\n", dp->params. interface_type[8]);␊ |
547 | //␉printf("interface_path[8] = %x\n", dp->params. interface_path[8]);␊ |
548 | //␉printf("dev_path[8] = %x\n", dp->params. dev_path[8]);␊ |
549 | //␉printf("reserved3 = %x\n", dp->params. reserved3);␊ |
550 | //␉printf("checksum = %x\n", dp->params. checksum);␊ |
551 | ␉printf("io_port_base = %x\n", dp->dpte.io_port_base);␊ |
552 | ␉printf("control_port_base = %x\n", dp->dpte.control_port_base);␊ |
553 | ␉printf("head_flags = %x\n", dp->dpte. head_flags);␊ |
554 | ␉printf("vendor_info = %x\n", dp->dpte. vendor_info);␊ |
555 | ␉printf("irq = %x\n", dp->dpte. irq);␊ |
556 | //␉printf("irq_unused = %x\n", dp->dpte. irq_unused);␊ |
557 | ␉printf("block_count = %x\n", dp->dpte. block_count);␊ |
558 | ␉printf("dma_channe = %x\n", dp->dpte. dma_channel);␊ |
559 | ␉printf("dma_type = %x\n", dp->dpte. dma_type);␊ |
560 | ␉printf("pio_type = %x\n", dp->dpte. pio_type);␊ |
561 | ␉printf("pio_unused = %x\n", dp->dpte. pio_unused);␊ |
562 | ␉printf("option_flags = %x\n", dp->dpte.option_flags);␊ |
563 | //␉printf("reserved = %x\n", dp->dpte.reserved);␊ |
564 | ␉printf("revision = %x\n", dp->dpte. revision);␊ |
565 | //␉printf("checksum = %x\n", dp->dpte. checksum);␊ |
566 | }␊ |
567 | ␊ |
568 | #endif␊ |
569 | ␊ |
570 | int get_drive_info(int drive, struct driveInfo *dp)␊ |
571 | {␊ |
572 | ␉boot_drive_info_t *di = &dp->di;␊ |
573 | ␉int ret = 0;␊ |
574 | ␉␊ |
575 | #if UNUSED␊ |
576 | ␉if (maxhd == 0) {␊ |
577 | ␉␉bb.intno = 0x13;␊ |
578 | ␉␉bb.eax.r.h = 0x08;␊ |
579 | ␉␉bb.edx.r.l = 0x80;␊ |
580 | ␉␉bios(&bb);␊ |
581 | ␉␉if (bb.flags.cf == 0)␊ |
582 | ␉␉␉maxhd = 0x7f + bb.edx.r.l;␊ |
583 | ␉};␊ |
584 | ␉␊ |
585 | ␉if (drive > maxhd)␊ |
586 | ␉␉return 0;␊ |
587 | #endif␊ |
588 | ␉␊ |
589 | ␉bzero(dp, sizeof(struct driveInfo));␊ |
590 | ␉dp->biosdev = drive;␊ |
591 | ␉␊ |
592 | ␉/* Check for El Torito no-emulation mode. */␊ |
593 | ␉dp->no_emulation = is_no_emulation(drive);␊ |
594 | ␊ |
595 | ␉/* Check drive for EBIOS support. */␊ |
596 | ␉bb.intno = 0x13;␊ |
597 | ␉bb.eax.r.h = 0x41;␊ |
598 | ␉bb.edx.r.l = drive;␊ |
599 | ␉bb.ebx.rr = 0x55aa;␊ |
600 | ␉bios(&bb);␊ |
601 | ␉␊ |
602 | ␉if ((bb.ebx.rr == 0xaa55) && (bb.flags.cf == 0)) {␊ |
603 | ␉␉/* Get flags for supported operations. */␊ |
604 | ␉␉dp->uses_ebios = bb.ecx.r.l;␊ |
605 | ␉}␊ |
606 | ␉␊ |
607 | ␉if (dp->uses_ebios & (EBIOS_ENHANCED_DRIVE_INFO | EBIOS_LOCKING_ACCESS | EBIOS_FIXED_DISK_ACCESS)) {␊ |
608 | ␉␉/* Get EBIOS drive info. */␊ |
609 | ␉␉static struct drive_params params;␊ |
610 | ␉␉␊ |
611 | ␉␉params.buf_size = sizeof(params);␊ |
612 | ␉␉bb.intno = 0x13;␊ |
613 | ␉␉bb.eax.r.h = 0x48;␊ |
614 | ␉␉bb.edx.r.l = drive;␊ |
615 | ␉␉bb.esi.rr = NORMALIZED_OFFSET((unsigned)¶ms);␊ |
616 | ␉␉bb.ds␉ = NORMALIZED_SEGMENT((unsigned)¶ms);␊ |
617 | ␉␉bios(&bb);␊ |
618 | ␉␉␊ |
619 | ␉␉if (bb.flags.cf != 0 /* || params.phys_sectors < 2097152 */) {␊ |
620 | ␉␉␉dp->uses_ebios = 0;␊ |
621 | ␉␉␉di->params.buf_size = 1;␊ |
622 | ␉␉}␊ |
623 | ␉␉else␊ |
624 | ␉␉{␊ |
625 | ␉␉␉bcopy(¶ms, &di->params, sizeof(params));␊ |
626 | ␉␉␉␊ |
627 | ␉␉␉if (drive >= BASE_HD_DRIVE &&␊ |
628 | ␉␉␉␉(dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) &&␊ |
629 | ␉␉␉␉di->params.buf_size >= 30 &&␊ |
630 | ␉␉␉␉!(di->params.dpte_offset == 0xFFFF && di->params.dpte_segment == 0xFFFF)) {␊ |
631 | ␉␉␉␉␉void *ptr = (void *)(di->params.dpte_offset + ((unsigned int)di->params.dpte_segment << 4));␊ |
632 | ␉␉␉␉␉bcopy(ptr, &di->dpte, sizeof(di->dpte));␊ |
633 | ␉␉␉}␊ |
634 | ␉␉}␊ |
635 | ␉}␊ |
636 | ␊ |
637 | /*␊ |
638 | * zef: This code will fail on recent JMicron and Intel option ROMs␊ |
639 | */ ␊ |
640 | //␉if (di->params.phys_heads == 0 || di->params.phys_spt == 0) {␊ |
641 | //␉␉/* Either it's not EBIOS, or EBIOS didn't tell us. */␊ |
642 | //␉␉bb.intno = 0x13;␊ |
643 | //␉␉bb.eax.r.h = 0x08;␊ |
644 | //␉␉bb.edx.r.l = drive;␊ |
645 | //␉␉bios(&bb);␊ |
646 | //␉␉if (bb.flags.cf == 0 && bb.eax.r.h == 0) {␊ |
647 | //␉␉␉unsigned long cyl;␊ |
648 | //␉␉␉unsigned long sec;␊ |
649 | //␉␉␉unsigned long hds;␊ |
650 | //␉␉␊ |
651 | //␉␉␉hds = bb.edx.r.h;␊ |
652 | //␉␉␉sec = bb.ecx.r.l & 0x3F;␊ |
653 | //␉␉␉if ((dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) && (sec != 0)) {␊ |
654 | //␉␉␉␉cyl = (di->params.phys_sectors / ((hds + 1) * sec)) - 1;␊ |
655 | //␉␉␉} else {␊ |
656 | //␉␉␉␉cyl = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
657 | //␉␉␉}␊ |
658 | //␉␉␉di->params.phys_heads = hds; ␊ |
659 | //␉␉␉di->params.phys_spt = sec;␊ |
660 | //␉␉␉di->params.phys_cyls = cyl;␊ |
661 | //␉␉} else {␊ |
662 | //␉␉␉ret = -1;␊ |
663 | //␉␉}␊ |
664 | //␉}␊ |
665 | ␊ |
666 | ␉if (dp->no_emulation) {␊ |
667 | ␉␉/* Some BIOSes give us erroneous EBIOS support information.␊ |
668 | ␉ ␉ * Assume that if you're on a CD, then you can use␊ |
669 | ␉ ␉ * EBIOS disk calls.␊ |
670 | ␉ ␉ */␊ |
671 | ␉␉dp->uses_ebios |= EBIOS_FIXED_DISK_ACCESS;␊ |
672 | ␉}␊ |
673 | #if DEBUG␊ |
674 | ␉print_drive_info(di);␊ |
675 | ␉printf("uses_ebios = 0x%x\n", dp->uses_ebios);␊ |
676 | ␉printf("result %d\n", ret);␊ |
677 | ␉pause();␊ |
678 | #endif␊ |
679 | ␊ |
680 | ␉if (ret == 0) {␊ |
681 | ␉␉dp->valid = 1;␊ |
682 | ␉}␊ |
683 | ␉return ret;␊ |
684 | }␊ |
685 | ␊ |
686 | int ebiosEjectMedia(int biosdev)␊ |
687 | {␊ |
688 | bb.intno = 0x13;␊ |
689 | bb.eax.r.h = 0x46;␊ |
690 | bb.eax.r.l = 0;␊ |
691 | bb.edx.rx = biosdev;␊ |
692 | bios(&bb);␊ |
693 | return bb.eax.r.h;␊ |
694 | }␊ |
695 | ␊ |
696 | void setCursorPosition(int x, int y, int page)␊ |
697 | {␊ |
698 | bb.intno = 0x10;␊ |
699 | bb.eax.r.h = 0x02;␊ |
700 | bb.ebx.r.h = page; /* page 0 for graphics */␊ |
701 | bb.edx.r.l = x;␊ |
702 | bb.edx.r.h = y;␊ |
703 | bios(&bb);␊ |
704 | }␊ |
705 | ␊ |
706 | void setCursorType(int type)␊ |
707 | {␊ |
708 | bb.intno = 0x10;␊ |
709 | bb.eax.r.h = 0x01;␊ |
710 | bb.ecx.rr = type;␊ |
711 | bios(&bb);␊ |
712 | }␊ |
713 | ␊ |
714 | void getCursorPositionAndType(int * x, int * y, int * type)␊ |
715 | {␊ |
716 | bb.intno = 0x10;␊ |
717 | bb.eax.r.h = 0x03;␊ |
718 | bios(&bb);␊ |
719 | *x = bb.edx.r.l;␊ |
720 | *y = bb.edx.r.h;␊ |
721 | *type = bb.ecx.rr;␊ |
722 | }␊ |
723 | ␊ |
724 | void scollPage(int x1, int y1, int x2, int y2, int attr, int rows, int dir)␊ |
725 | {␊ |
726 | bb.intno = 0x10;␊ |
727 | bb.eax.r.h = (dir > 0) ? 0x06 : 0x07;␊ |
728 | bb.eax.r.l = rows;␊ |
729 | bb.ebx.r.h = attr;␊ |
730 | bb.ecx.r.h = y1;␊ |
731 | bb.ecx.r.l = x1;␊ |
732 | bb.edx.r.h = y2;␊ |
733 | bb.edx.r.l = x2;␊ |
734 | bios(&bb);␊ |
735 | }␊ |
736 | ␊ |
737 | void clearScreenRows( int y1, int y2 )␊ |
738 | {␊ |
739 | scollPage( 0, y1, 80 - 1, y2, 0x07, y2 - y1 + 1, 1 );␊ |
740 | }␊ |
741 | ␊ |
742 | void setActiveDisplayPage( int page )␊ |
743 | {␊ |
744 | bb.intno = 0x10;␊ |
745 | bb.eax.r.h = 5;␊ |
746 | bb.eax.r.l = page;␊ |
747 | bios(&bb);␊ |
748 | }␊ |
749 | ␊ |
750 | #if DEBUG␊ |
751 | ␊ |
752 | int terminateDiskEmulation()␊ |
753 | {␊ |
754 | static char cd_spec[0x13];␊ |
755 | ␊ |
756 | bb.intno = 0x13;␊ |
757 | bb.eax.r.h = 0x4b;␊ |
758 | bb.eax.r.l = 0; // subfunc: terminate emulation ␊ |
759 | bb.esi.rr = NORMALIZED_OFFSET((unsigned)&cd_spec);␊ |
760 | bb.ds = NORMALIZED_SEGMENT((unsigned)&cd_spec);␊ |
761 | bios(&bb);␊ |
762 | return bb.eax.r.h;␊ |
763 | }␊ |
764 | ␊ |
765 | int readDriveParameters(int drive, struct driveParameters *dp)␊ |
766 | {␊ |
767 | bb.intno = 0x13;␊ |
768 | bb.edx.r.l = drive;␊ |
769 | bb.eax.r.h = 0x08;␊ |
770 | bios(&bb);␊ |
771 | if (bb.eax.r.h == 0) {␊ |
772 | dp->heads = bb.edx.r.h;␊ |
773 | dp->sectors = bb.ecx.r.l & 0x3F;␊ |
774 | dp->cylinders = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
775 | dp->totalDrives = bb.edx.r.l;␊ |
776 | } else {␊ |
777 | bzero(dp, sizeof(*dp));␊ |
778 | }␊ |
779 | return bb.eax.r.h;␊ |
780 | ␊ |
781 | }␊ |
782 | #endif␊ |
783 | ␊ |
784 | #ifdef APM_SUPPORT␊ |
785 | ␊ |
786 | #define APM_INTNO 0x15␊ |
787 | #define APM_INTCODE 0x53␊ |
788 | ␊ |
789 | int␊ |
790 | APMPresent(void)␊ |
791 | {␊ |
792 | bb.intno = APM_INTNO;␊ |
793 | bb.eax.r.h = APM_INTCODE;␊ |
794 | bb.eax.r.l = 0x00;␊ |
795 | bb.ebx.rr = 0x0000;␊ |
796 | bios(&bb);␊ |
797 | if ((bb.flags.cf == 0) &&␊ |
798 | (bb.ebx.r.h == 'P') &&␊ |
799 | (bb.ebx.r.l == 'M')) {␊ |
800 | /* Success */␊ |
801 | bootArgs->apmConfig.major_vers = bb.eax.r.h;␊ |
802 | bootArgs->apmConfig.minor_vers = bb.eax.r.l;␊ |
803 | bootArgs->apmConfig.flags.data = bb.ecx.rr;␊ |
804 | return 1;␊ |
805 | }␊ |
806 | return 0;␊ |
807 | }␊ |
808 | ␊ |
809 | int␊ |
810 | APMConnect32(void)␊ |
811 | {␊ |
812 | bb.intno = APM_INTNO;␊ |
813 | bb.eax.r.h = APM_INTCODE;␊ |
814 | bb.eax.r.l = 0x03;␊ |
815 | bb.ebx.rr = 0x0000;␊ |
816 | bios(&bb);␊ |
817 | if (bb.flags.cf == 0) {␊ |
818 | /* Success */␊ |
819 | bootArgs->apmConfig.cs32_base = (bb.eax.rr) << 4;␊ |
820 | bootArgs->apmConfig.entry_offset = bb.ebx.rx;␊ |
821 | bootArgs->apmConfig.cs16_base = (bb.ecx.rr) << 4;␊ |
822 | bootArgs->apmConfig.ds_base = (bb.edx.rr) << 4;␊ |
823 | if (bootArgs->apmConfig.major_vers >= 1 &&␊ |
824 | bootArgs->apmConfig.minor_vers >= 1) {␊ |
825 | bootArgs->apmConfig.cs_length = bb.esi.rr;␊ |
826 | bootArgs->apmConfig.ds_length = bb.edi.rr;␊ |
827 | } else {␊ |
828 | bootArgs->apmConfig.cs_length = ␊ |
829 | bootArgs->apmConfig.ds_length = 64 * 1024;␊ |
830 | }␊ |
831 | bootArgs->apmConfig.connected = 1;␊ |
832 | return 1;␊ |
833 | }␊ |
834 | return 0;␊ |
835 | }␊ |
836 | ␊ |
837 | #endif /* APM_SUPPORT */␊ |
838 | ␊ |
839 | #ifdef EISA_SUPPORT␊ |
840 | bool eisa_present(void)␊ |
841 | {␊ |
842 | static bool checked = false;␊ |
843 | static bool isEISA;␊ |
844 | ␊ |
845 | if (!checked) {␊ |
846 | if (strncmp((char *)0xfffd9, "EISA", 4) == 0)␊ |
847 | isEISA = true;␊ |
848 | ␊ |
849 | checked = true;␊ |
850 | }␊ |
851 | ␊ |
852 | return (isEISA);␊ |
853 | }␊ |
854 | ␊ |
855 | int␊ |
856 | ReadEISASlotInfo(EISA_slot_info_t *ep, int slot)␊ |
857 | {␊ |
858 | union {␊ |
859 | struct {␊ |
860 | unsigned char char2h :2;␊ |
861 | unsigned char char1 :5;␊ |
862 | unsigned char char3 :5;␊ |
863 | unsigned char char2l :3;␊ |
864 | unsigned char d2 :4;␊ |
865 | unsigned char d1 :4;␊ |
866 | unsigned char d4 :4;␊ |
867 | unsigned char d3 :4;␊ |
868 | } s;␊ |
869 | unsigned char data[4];␊ |
870 | } u;␊ |
871 | static char hex[0x10] = "0123456789ABCDEF";␊ |
872 | ␊ |
873 | ␊ |
874 | bb.intno = 0x15;␊ |
875 | bb.eax.r.h = 0xd8;␊ |
876 | bb.eax.r.l = 0x00;␊ |
877 | bb.ecx.r.l = slot;␊ |
878 | bios(&bb);␊ |
879 | if (bb.flags.cf)␊ |
880 | return bb.eax.r.h;␊ |
881 | ep->u_ID.d = bb.eax.r.l;␊ |
882 | ep->configMajor = bb.ebx.r.h;␊ |
883 | ep->configMinor = bb.ebx.r.l;␊ |
884 | ep->checksum = bb.ecx.rr;␊ |
885 | ep->numFunctions = bb.edx.r.h;␊ |
886 | ep->u_resources.d = bb.edx.r.l;␊ |
887 | u.data[0] = bb.edi.r.l;␊ |
888 | u.data[1] = bb.edi.r.h;␊ |
889 | u.data[2] = bb.esi.r.l;␊ |
890 | u.data[3] = bb.esi.r.h;␊ |
891 | ep->id[0] = u.s.char1 + ('A' - 1);␊ |
892 | ep->id[1] = (u.s.char2l | (u.s.char2h << 3)) + ('A' - 1);␊ |
893 | ep->id[2] = u.s.char3 + ('A' - 1);␊ |
894 | ep->id[3] = hex[u.s.d1];␊ |
895 | ep->id[4] = hex[u.s.d2];␊ |
896 | ep->id[5] = hex[u.s.d3];␊ |
897 | ep->id[6] = hex[u.s.d4];␊ |
898 | ep->id[7] = 0;␊ |
899 | return 0;␊ |
900 | }␊ |
901 | ␊ |
902 | /*␊ |
903 | * Note: ep must point to an address below 64k.␊ |
904 | */␊ |
905 | ␊ |
906 | int␊ |
907 | ReadEISAFuncInfo(EISA_func_info_t *ep, int slot, int function)␊ |
908 | {␊ |
909 | bb.intno = 0x15;␊ |
910 | bb.eax.r.h = 0xd8;␊ |
911 | bb.eax.r.l = 0x01;␊ |
912 | bb.ecx.r.l = slot;␊ |
913 | bb.ecx.r.h = function;␊ |
914 | bb.esi.rr = (unsigned int)ep->data;␊ |
915 | bios(&bb);␊ |
916 | if (bb.eax.r.h == 0) {␊ |
917 | ep->slot = slot;␊ |
918 | ep->function = function;␊ |
919 | }␊ |
920 | return bb.eax.r.h;␊ |
921 | }␊ |
922 | #endif /* EISA_SUPPORT */␊ |
923 | ␊ |
924 | #define PCI_SIGNATURE 0x20494350 /* "PCI " */␊ |
925 | ␊ |
926 | /*int␊ |
927 | ReadPCIBusInfo(PCI_bus_info_t *pp)␊ |
928 | {␊ |
929 | bb.intno = 0x1a;␊ |
930 | bb.eax.r.h = 0xb1;␊ |
931 | bb.eax.r.l = 0x01;␊ |
932 | bios(&bb);␊ |
933 | if ((bb.eax.r.h == 0) && (bb.edx.rx == PCI_SIGNATURE)) {␊ |
934 | pp->BIOSPresent = 1;␊ |
935 | pp->u_bus.d = bb.eax.r.l;␊ |
936 | pp->majorVersion = bb.ebx.r.h;␊ |
937 | pp->minorVersion = bb.ebx.r.l;␊ |
938 | pp->maxBusNum = bb.ecx.r.l;␊ |
939 | return 0;␊ |
940 | }␊ |
941 | return -1;␊ |
942 | }*/␊ |
943 | ␊ |
944 | void sleep(int n)␊ |
945 | {␊ |
946 | unsigned int endtime = (time18() + 18*n);␊ |
947 | while (time18() < endtime);␊ |
948 | }␊ |
949 | ␊ |
950 | void delay(int ms)␊ |
951 | {␊ |
952 | bb.intno = 0x15;␊ |
953 | bb.eax.r.h = 0x86;␊ |
954 | bb.ecx.rr = ms >> 16;␊ |
955 | bb.edx.rr = ms & 0xFFFF;␊ |
956 | bios(&bb);␊ |
957 | }␊ |
958 | ␊ |
959 |