| 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 "bootstruct.h"␊ |
| 44 | #include "libsaio.h"␊ |
| 45 | ␊ |
| 46 | ␊ |
| 47 | #define MAX_DRIVES 8␊ |
| 48 | ␊ |
| 49 | static biosBuf_t bb;␊ |
| 50 | ␊ |
| 51 | ␊ |
| 52 | //==============================================================================␊ |
| 53 | ␊ |
| 54 | int bgetc(void)␊ |
| 55 | {␊ |
| 56 | #if 0␊ |
| 57 | ␉/* Poll for the next character. Most real BIOS do not need this as the␊ |
| 58 | ␉ INT 16h,AH=0h function will block until one is received.␊ |
| 59 | ␉ Unfortunately, Apple's EFI CSM will never wake up. This idea is lifted␊ |
| 60 | ␉ from the grub-a20.patch to GRUB's stage2/asm.S file.␊ |
| 61 | ␉*/␊ |
| 62 | ␉while(!readKeyboardStatus());␊ |
| 63 | ␉// Apple's EFI CSM???? Who cares - Zenith432␊ |
| 64 | #endif␊ |
| 65 | ␊ |
| 66 | ␉bb.intno = 0x16;␊ |
| 67 | ␉bb.eax.r.h = 0x00;␊ |
| 68 | ␉bios(&bb);␊ |
| 69 | ␊ |
| 70 | ␉return bb.eax.rr;␊ |
| 71 | }␊ |
| 72 | ␊ |
| 73 | ␊ |
| 74 | //==============================================================================␊ |
| 75 | ␊ |
| 76 | int readKeyboardStatus(void)␊ |
| 77 | {␊ |
| 78 | ␉bb.intno = 0x16;␊ |
| 79 | ␉bb.eax.r.h = 0x01;␊ |
| 80 | ␉bios(&bb);␊ |
| 81 | ␊ |
| 82 | ␉if (bb.flags.zf) {␊ |
| 83 | ␉␉return 0;␊ |
| 84 | ␉} else ␉{␊ |
| 85 | ␉␉return bb.eax.rr;␊ |
| 86 | ␉}␊ |
| 87 | }␊ |
| 88 | ␊ |
| 89 | int readKeyboardShiftFlags(void)␊ |
| 90 | {␊ |
| 91 | #if 0␊ |
| 92 | ␉bb.intno = 0x16;␊ |
| 93 | ␉bb.eax.r.h = 0x02;␊ |
| 94 | ␉bios(&bb);␊ |
| 95 | ␉return bb.eax.r.l;␊ |
| 96 | #else␊ |
| 97 | ␉return *(uint8_t const volatile*) 0x417U;␊ |
| 98 | #endif␊ |
| 99 | }␊ |
| 100 | ␊ |
| 101 | ␊ |
| 102 | //==============================================================================␊ |
| 103 | ␊ |
| 104 | unsigned int time18(void)␊ |
| 105 | {␊ |
| 106 | #if 0␊ |
| 107 | ␉union {␊ |
| 108 | ␉␉struct {␊ |
| 109 | ␉␉␉unsigned int low:16;␊ |
| 110 | ␉␉␉unsigned int high:16;␊ |
| 111 | ␉␉} s;␊ |
| 112 | ␊ |
| 113 | ␉␉unsigned int i;␊ |
| 114 | ␉} time;␊ |
| 115 | ␊ |
| 116 | ␉bb.intno = 0x1a;␊ |
| 117 | ␉bb.eax.r.h = 0x00;␊ |
| 118 | ␉bios(&bb);␊ |
| 119 | ␉time.s.low = bb.edx.rr;␊ |
| 120 | ␉time.s.high = bb.ecx.rr;␊ |
| 121 | ␊ |
| 122 | ␉return time.i;␊ |
| 123 | #else␊ |
| 124 | ␉(void) __sync_lock_test_and_set((uint8_t volatile*) 0x470U, (uint8_t) 0U);␊ |
| 125 | ␉return *(uint32_t const volatile*) 0x46CU;␊ |
| 126 | #endif␊ |
| 127 | }␊ |
| 128 | ␊ |
| 129 | #if 0␊ |
| 130 | ␊ |
| 131 | static unsigned long rerangeMemoryMap(unsigned long count);␊ |
| 132 | static unsigned long rerangeMemoryMap(unsigned long count)␊ |
| 133 | {␊ |
| 134 | ␉int i, still_changing, newcount = count;␊ |
| 135 | ␊ |
| 136 | ␉MemoryRange * range = (MemoryRange *)BIOS_ADDR;␊ |
| 137 | ␉struct MemoryRange change_tmp;␊ |
| 138 | ␊ |
| 139 | ␉/* sort map list by memory addresses (low -> high) */␊ |
| 140 | ␉still_changing = 1;␊ |
| 141 | ␉while (still_changing) {␊ |
| 142 | ␉␉still_changing = 0;␊ |
| 143 | ␉␉for (i=1; i<count; i++) {␊ |
| 144 | ␉␉␉/* if <current_addr> > <last_addr>, swap */␊ |
| 145 | ␉␉␉if (range[i].base < range[i-1].base) {␊ |
| 146 | ␉␉␉␉change_tmp.base = range[i].base;␊ |
| 147 | ␉␉␉␉change_tmp.length = range[i].length;␊ |
| 148 | ␉␉␉␉change_tmp.type = range[i].type;␊ |
| 149 | ␊ |
| 150 | ␉␉␉␉range[i].base = range[i-1].base;␊ |
| 151 | ␉␉␉␉range[i].length = range[i-1].length;␊ |
| 152 | ␉␉␉␉range[i].type = range[i-1].type;␊ |
| 153 | ␊ |
| 154 | ␉␉␉␉range[i-1].base = change_tmp.base;␊ |
| 155 | ␉␉␉␉range[i-1].length = change_tmp.length;␊ |
| 156 | ␉␉␉␉range[i-1].type = change_tmp.type;␊ |
| 157 | ␊ |
| 158 | ␉␉␉␉still_changing=1;␊ |
| 159 | ␉␉␉}␊ |
| 160 | ␉␉}␊ |
| 161 | ␉}␊ |
| 162 | ␊ |
| 163 | ␉/* clear overlaps */␊ |
| 164 | ␉/* linux's arch/i386/kern/setup.c may have better algorithm */␊ |
| 165 | ␉for (i=1; i<count; i++) {␊ |
| 166 | ␉␉if ( range[i-1].base + range[i-1].length > range[i].base ) {␊ |
| 167 | ␉␉␉range[newcount].base = range[i].base + range[i].length;␊ |
| 168 | ␉␉␉range[newcount].length = range[i-1].base + range[i-1].length - range[newcount].base;␊ |
| 169 | ␉␉␉range[newcount].type = range[i-1].type;␊ |
| 170 | ␉␉␉newcount++;␊ |
| 171 | ␊ |
| 172 | ␉␉␉range[i-1].length = range[i].base - range[i-1].base;␊ |
| 173 | ␉␉}␊ |
| 174 | ␉}␊ |
| 175 | ␊ |
| 176 | ␉/*␊ |
| 177 | ␉ * 0xb0000000 : 0x10000000 NG␊ |
| 178 | ␉ * 0xc0000400 NG␊ |
| 179 | ␉ * 0xf2000000 NG␊ |
| 180 | ␉ */␊ |
| 181 | ␉range[newcount].base = 0xb0000000;␊ |
| 182 | ␉range[newcount].length = 0x0f000000;␊ |
| 183 | ␉range[newcount].type = kMemoryRangeUsable;␊ |
| 184 | ␉newcount++;␊ |
| 185 | ␊ |
| 186 | ␉return newcount;␊ |
| 187 | }␊ |
| 188 | #endif␊ |
| 189 | ␊ |
| 190 | unsigned long getMemoryMap( MemoryRange * rangeArray,␊ |
| 191 | unsigned long maxRangeCount,␊ |
| 192 | unsigned long * conMemSizePtr,␊ |
| 193 | unsigned long * extMemSizePtr )␊ |
| 194 | {␊ |
| 195 | ␉#define kMemoryMapSignature 'SMAP'␊ |
| 196 | ␉#define kDescriptorSizeMin 20␊ |
| 197 | ␊ |
| 198 | ␉MemoryRange *␉range = (MemoryRange *)BIOS_ADDR;␊ |
| 199 | ␉unsigned long␉count = 0;␊ |
| 200 | ␉// unsigned long␉rerangedCount;␊ |
| 201 | ␉unsigned long long␉conMemSize = 0;␊ |
| 202 | ␉unsigned long long␉extMemSize = 0;␊ |
| 203 | ␊ |
| 204 | ␉// Prepare for the INT15 E820h call. Each call returns a single␊ |
| 205 | ␉// memory range. A continuation value is returned that must be␊ |
| 206 | ␉// provided on a subsequent call to fetch the next range.␊ |
| 207 | ␉//␊ |
| 208 | ␉// Certain BIOSes (Award 6.00PG) expect the upper word in EAX␊ |
| 209 | ␉// to be cleared on entry, otherwise only a single range will␊ |
| 210 | ␉// be reported.␊ |
| 211 | ␉//␊ |
| 212 | ␉// Some BIOSes will simply ignore the value of ECX on entry.␊ |
| 213 | ␉// Probably best to keep its value at 20 to avoid surprises.␊ |
| 214 | ␊ |
| 215 | ␉//printf("Get memory map 0x%x, %d\n", rangeArray); getchar();␊ |
| 216 | ␉if (maxRangeCount > (BIOS_LEN / sizeof(MemoryRange))) {␊ |
| 217 | ␉␉maxRangeCount = (BIOS_LEN / sizeof(MemoryRange));␊ |
| 218 | ␉}␊ |
| 219 | ␉bb.ebx.rx = 0; // Initial continuation value must be zero.␊ |
| 220 | ␊ |
| 221 | ␉while (count < maxRangeCount)␊ |
| 222 | ␉{␊ |
| 223 | ␉␉bb.intno = 0x15;␊ |
| 224 | ␉␉bb.eax.rx = 0xe820;␊ |
| 225 | ␉␉bb.ecx.rx = kDescriptorSizeMin;␊ |
| 226 | ␉␉bb.edx.rx = kMemoryMapSignature;␊ |
| 227 | ␉␉bb.edi.rr = NORMALIZED_OFFSET( (unsigned long) range );␊ |
| 228 | ␉␉bb.es = NORMALIZED_SEGMENT( (unsigned long) range );␊ |
| 229 | ␉␉bios(&bb);␊ |
| 230 | ␊ |
| 231 | ␉␉// Check for errors.␊ |
| 232 | ␊ |
| 233 | ␉␉if ( bb.flags.cf␊ |
| 234 | ␉␉␉|| bb.eax.rx != kMemoryMapSignature␊ |
| 235 | ␉␉␉|| bb.ecx.rx != kDescriptorSizeMin ) {␊ |
| 236 | ␉␉␉//printf("Got an error %x %x %x\n", bb.flags.cf,␊ |
| 237 | ␉␉␉// bb.eax.rx, bb.ecx.rx);␊ |
| 238 | ␉␉␉break;␊ |
| 239 | ␉␉}␊ |
| 240 | ␊ |
| 241 | ␉␉// Tally up the conventional/extended memory sizes.␊ |
| 242 | ␊ |
| 243 | ␉␉if ( range->type == kMemoryRangeUsable ||␊ |
| 244 | ␉␉␉range->type == kMemoryRangeACPI ||␊ |
| 245 | ␉␉␉range->type == kMemoryRangeNVS ) {␊ |
| 246 | ␉␉␉// Tally the conventional memory ranges.␊ |
| 247 | ␉␉␉if ( range->base + range->length <= 0xa0000 ) {␊ |
| 248 | ␉␉␉␉conMemSize += range->length;␊ |
| 249 | ␉␉␉}␊ |
| 250 | ␊ |
| 251 | ␉␉␉// Record the top of extended memory.␊ |
| 252 | ␉␉␉if (range->base >= EXTENDED_ADDR) {␊ |
| 253 | ␉␉␉␉extMemSize += range->length;␊ |
| 254 | ␉␉␉}␊ |
| 255 | ␉␉}␊ |
| 256 | ␊ |
| 257 | ␉␉range++;␊ |
| 258 | ␉␉count++;␊ |
| 259 | ␊ |
| 260 | ␉␉// Is this the last address range?␊ |
| 261 | ␊ |
| 262 | ␉␉if ( bb.ebx.rx == 0 ) {␊ |
| 263 | ␉␉␉//printf("last range\n");␊ |
| 264 | ␉␉␉break;␊ |
| 265 | ␉␉}␊ |
| 266 | ␉}␊ |
| 267 | ␉*conMemSizePtr = conMemSize / 1024; // size in KB␊ |
| 268 | ␉*extMemSizePtr = extMemSize / 1024; // size in KB␊ |
| 269 | ␊ |
| 270 | #if 0␊ |
| 271 | ␉rerangedCount = rerangeMemoryMap(count);␊ |
| 272 | ␉range += rerangedCount - count;␊ |
| 273 | #endif␊ |
| 274 | ␊ |
| 275 | ␉// Copy out data␊ |
| 276 | ␉bcopy((char *)BIOS_ADDR, rangeArray, ((char *)range - (char *)BIOS_ADDR));␊ |
| 277 | ␊ |
| 278 | #if DEBUG␊ |
| 279 | ␉{␊ |
| 280 | ␉int i;␊ |
| 281 | printf("%d total ranges\n", count);␊ |
| 282 | ␊ |
| 283 | ␉␉getchar();␊ |
| 284 | ␊ |
| 285 | ␉␉for (i = 0, range = rangeArray; i<count; i++, range++) {␊ |
| 286 | ␉␉␉printf("range: type %d, base 0x%x, length 0x%x\n",␊ |
| 287 | ␉␉␉range->type, (unsigned int)range->base, (unsigned int)range->length);␊ |
| 288 | ␉␉␉getchar();␊ |
| 289 | ␉␉}␊ |
| 290 | ␉}␊ |
| 291 | #endif␊ |
| 292 | ␊ |
| 293 | ␉return count;␊ |
| 294 | }␊ |
| 295 | ␊ |
| 296 | ␊ |
| 297 | //==============================================================================␊ |
| 298 | ␊ |
| 299 | ␊ |
| 300 | unsigned long getExtendedMemorySize()␊ |
| 301 | {␊ |
| 302 | ␉// Get extended memory size for large configurations. Not used unless␊ |
| 303 | ␉// the INT15, E820H call (Get System Address Map) failed.␊ |
| 304 | ␉//␊ |
| 305 | ␉// Input:␊ |
| 306 | ␉//␊ |
| 307 | ␉// AX Function Code E801h␊ |
| 308 | ␉//␊ |
| 309 | ␉// Outputs:␊ |
| 310 | ␉//␊ |
| 311 | ␉// CF Carry Flag Carry cleared indicates no error.␊ |
| 312 | ␉// AX Extended 1 Number of contiguous KB between 1 and 16 MB,␊ |
| 313 | ␉// maximum 0x3C00 = 15 MB.␊ |
| 314 | ␉// BX Extended 2 Number of contiguous 64 KB blocks between␊ |
| 315 | ␉// 16 MB and 4 GB.␊ |
| 316 | ␉// CX Configured 1 Number of contiguous KB between 1 and 16 MB,␊ |
| 317 | ␉// maximum 0x3C00 = 15 MB.␊ |
| 318 | ␉// DX Configured 2 Number of contiguous 64 KB blocks between␊ |
| 319 | ␉// 16 MB and 4 GB.␊ |
| 320 | ␊ |
| 321 | ␉bb.intno = 0x15;␊ |
| 322 | ␉bb.eax.rx = 0xe801;␊ |
| 323 | ␉bios(&bb);␊ |
| 324 | ␊ |
| 325 | ␉// Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
| 326 | ␊ |
| 327 | ␉if (bb.flags.cf == 0) {␊ |
| 328 | ␉␉return (bb.ebx.rr * 64 + bb.eax.rr);␊ |
| 329 | ␉}␊ |
| 330 | ␊ |
| 331 | ␉// Get Extended memory size. Called on last resort since the return␊ |
| 332 | ␉// value is limited to 16-bits (a little less than 64MB max). May␊ |
| 333 | ␉// not be supported by modern BIOSes.␊ |
| 334 | ␉//␊ |
| 335 | ␉// Input:␊ |
| 336 | ␉//␊ |
| 337 | ␉// AX Function Code E801h␊ |
| 338 | ␉//␊ |
| 339 | ␉// Outputs:␊ |
| 340 | ␉//␊ |
| 341 | ␉// CF Carry Flag Carry cleared indicates no error.␊ |
| 342 | ␉// AX Memory Count Number of contiguous KB above 1MB.␊ |
| 343 | ␊ |
| 344 | ␉bb.intno = 0x15;␊ |
| 345 | ␉bb.eax.rx = 0x88;␊ |
| 346 | ␉bios(&bb);␊ |
| 347 | ␊ |
| 348 | ␉// Return the size of memory above 1MB (extended memory) in kilobytes.␊ |
| 349 | ␊ |
| 350 | ␉return bb.flags.cf ? 0 : bb.eax.rr;␊ |
| 351 | }␊ |
| 352 | ␊ |
| 353 | ␊ |
| 354 | //==============================================================================␊ |
| 355 | ␊ |
| 356 | ␊ |
| 357 | unsigned long getConventionalMemorySize()␊ |
| 358 | {␊ |
| 359 | ␉bb.intno = 0x12;␊ |
| 360 | ␉bios(&bb);␊ |
| 361 | ␊ |
| 362 | ␉return bb.eax.rr; // kilobytes␊ |
| 363 | }␊ |
| 364 | ␊ |
| 365 | ␊ |
| 366 | //==============================================================================␊ |
| 367 | ␊ |
| 368 | ␊ |
| 369 | void video_mode(int mode)␊ |
| 370 | {␊ |
| 371 | ␉bb.intno = 0x10;␊ |
| 372 | ␉bb.eax.r.h = 0x00;␊ |
| 373 | ␉bb.eax.r.l = mode;␊ |
| 374 | ␉bios(&bb);␊ |
| 375 | }␊ |
| 376 | ␊ |
| 377 | ␊ |
| 378 | //==============================================================================␊ |
| 379 | ␊ |
| 380 | int biosread(int dev, int cyl, int head, int sec, int num)␊ |
| 381 | {␊ |
| 382 | ␉int i;␊ |
| 383 | ␊ |
| 384 | ␉bb.intno = 0x13;␊ |
| 385 | ␉sec += 1; // sector numbers start at 1.␊ |
| 386 | ␊ |
| 387 | ␉for (i = 0; ;) {␊ |
| 388 | ␉␉bb.ecx.r.h = cyl;␊ |
| 389 | ␉␉bb.ecx.r.l = ((cyl & 0x300) >> 2) | (sec & 0x3F);␊ |
| 390 | ␉␉bb.edx.r.h = head;␊ |
| 391 | ␉␉bb.edx.r.l = dev;␊ |
| 392 | ␉␉bb.eax.r.l = num;␊ |
| 393 | ␉␉bb.ebx.rr = OFFSET(ptov(BIOS_ADDR));␊ |
| 394 | ␉␉bb.es = SEGMENT(ptov(BIOS_ADDR));␊ |
| 395 | ␊ |
| 396 | ␉␉bb.eax.r.h = 0x02;␊ |
| 397 | ␉␉bios(&bb);␊ |
| 398 | ␊ |
| 399 | ␉␉// In case of a successful call, make sure we set AH (return code) to zero.␊ |
| 400 | ␉␉if (bb.flags.cf == 0) {␊ |
| 401 | ␉␉␉bb.eax.r.h = 0;␊ |
| 402 | ␉␉}␊ |
| 403 | ␊ |
| 404 | ␉␉// Now we can really check for the return code (AH) value.␊ |
| 405 | ␉␉if ((bb.eax.r.h == 0x00) || (i++ >= 5)) {␊ |
| 406 | ␉␉␉break;␊ |
| 407 | ␉␉}␊ |
| 408 | ␊ |
| 409 | // Reset disk subsystem and try again.␊ |
| 410 | ␉␉bb.eax.r.h = 0x00;␊ |
| 411 | ␉␉bios(&bb);␊ |
| 412 | ␉}␊ |
| 413 | ␉return bb.eax.r.h;␊ |
| 414 | }␊ |
| 415 | ␊ |
| 416 | ␊ |
| 417 | //==============================================================================␊ |
| 418 | ␊ |
| 419 | int ebiosread(int dev, unsigned long long sec, int count)␊ |
| 420 | {␊ |
| 421 | ␉int i;␊ |
| 422 | ␊ |
| 423 | ␉static struct {␊ |
| 424 | ␉␉unsigned char size;␊ |
| 425 | ␉␉unsigned char reserved;␊ |
| 426 | ␉␉unsigned char numblocks;␊ |
| 427 | ␉␉unsigned char reserved2;␊ |
| 428 | ␉␉unsigned short bufferOffset;␊ |
| 429 | ␉␉unsigned short bufferSegment;␊ |
| 430 | ␉␉unsigned long long startblock;␊ |
| 431 | ␉} addrpacket __attribute__((aligned(16))) = {0};␊ |
| 432 | ␉addrpacket.size = sizeof(addrpacket);␊ |
| 433 | ␊ |
| 434 | ␉for (i = 0; ;) {␊ |
| 435 | ␉␉bb.intno = 0x13;␊ |
| 436 | ␉␉bb.eax.r.h = 0x42;␊ |
| 437 | ␉␉bb.edx.r.l = dev;␊ |
| 438 | ␉␉bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
| 439 | ␉␉bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
| 440 | ␉␉addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
| 441 | ␉␉addrpacket.numblocks = count;␊ |
| 442 | ␉␉addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
| 443 | ␉␉addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
| 444 | ␉␉addrpacket.startblock = sec;␊ |
| 445 | ␉␉bios(&bb);␊ |
| 446 | ␊ |
| 447 | ␉␉// In case of a successful call, make sure we set AH (return code) to zero.␊ |
| 448 | ␉␉if (bb.flags.cf == 0) {␊ |
| 449 | ␉␉␉bb.eax.r.h = 0;␊ |
| 450 | ␉␉}␊ |
| 451 | ␊ |
| 452 | ␉␉// Now we can really check for the return code (AH) value.␊ |
| 453 | ␉␉if ((bb.eax.r.h == 0x00) || (i++ >= 5)) {␊ |
| 454 | ␉␉␉break;␊ |
| 455 | ␉␉}␊ |
| 456 | ␊ |
| 457 | ␉␉// Reset disk subsystem and try again.␊ |
| 458 | ␉␉bb.eax.r.h = 0x00;␊ |
| 459 | ␉␉bios(&bb);␊ |
| 460 | ␉}␊ |
| 461 | ␊ |
| 462 | ␉return bb.eax.r.h;␊ |
| 463 | }␊ |
| 464 | ␊ |
| 465 | //==============================================================================␊ |
| 466 | ␊ |
| 467 | int ebioswrite(int dev, long sec, int count)␊ |
| 468 | {␊ |
| 469 | ␉int i;␊ |
| 470 | ␉static struct {␊ |
| 471 | ␉␉unsigned char size;␊ |
| 472 | ␉␉unsigned char reserved;␊ |
| 473 | ␉␉unsigned char numblocks;␊ |
| 474 | ␉␉unsigned char reserved2;␊ |
| 475 | ␉␉unsigned short bufferOffset;␊ |
| 476 | ␉␉unsigned short bufferSegment;␊ |
| 477 | ␉␉unsigned long long startblock;␊ |
| 478 | ␉} addrpacket __attribute__((aligned(16))) = {0};␊ |
| 479 | ␉addrpacket.size = sizeof(addrpacket);␊ |
| 480 | ␊ |
| 481 | ␉for (i=0;;) {␊ |
| 482 | ␉␉bb.intno = 0x13;␊ |
| 483 | ␉␉bb.eax.r.l = 0; /* Don't verify */␊ |
| 484 | ␉␉bb.eax.r.h = 0x43;␊ |
| 485 | ␉␉bb.edx.r.l = dev;␊ |
| 486 | ␉␉bb.esi.rr = NORMALIZED_OFFSET((unsigned)&addrpacket);␊ |
| 487 | ␉␉bb.ds = NORMALIZED_SEGMENT((unsigned)&addrpacket);␊ |
| 488 | ␉␉addrpacket.reserved = addrpacket.reserved2 = 0;␊ |
| 489 | ␉␉addrpacket.numblocks = count;␊ |
| 490 | ␉␉addrpacket.bufferOffset = OFFSET(ptov(BIOS_ADDR));␊ |
| 491 | ␉␉addrpacket.bufferSegment = SEGMENT(ptov(BIOS_ADDR));␊ |
| 492 | ␉␉addrpacket.startblock = sec;␊ |
| 493 | ␉␉bios(&bb);␊ |
| 494 | ␊ |
| 495 | ␉␉/* In case of a successful call, make sure we set AH (return code) to zero. */␊ |
| 496 | ␉␉if (bb.flags.cf == 0)␊ |
| 497 | ␉␉␉bb.eax.r.h = 0;␊ |
| 498 | ␊ |
| 499 | ␉␉/* Now we can really check for the return code (AH) value. */␊ |
| 500 | ␉␉if ((bb.eax.r.h == 0x00) || (i++ >= 5))␊ |
| 501 | ␉␉break;␊ |
| 502 | ␊ |
| 503 | ␉␉/* reset disk subsystem and try again */␊ |
| 504 | ␉␉bb.eax.r.h = 0x00;␊ |
| 505 | ␉␉bios(&bb);␊ |
| 506 | ␉}␊ |
| 507 | ␉return bb.eax.r.h;␊ |
| 508 | }␊ |
| 509 | ␊ |
| 510 | void bios_putchar(int ch)␊ |
| 511 | {␊ |
| 512 | ␉bb.intno = 0x10;␊ |
| 513 | ␉bb.ebx.r.h = 0x00; /* background black */␊ |
| 514 | ␉bb.ebx.r.l = 0x0F; /* foreground white */␊ |
| 515 | ␉bb.eax.r.h = 0x0e;␊ |
| 516 | ␉bb.eax.r.l = ch;␊ |
| 517 | ␉bios(&bb);␊ |
| 518 | }␊ |
| 519 | ␊ |
| 520 | ␊ |
| 521 | //==============================================================================␊ |
| 522 | ␊ |
| 523 | void putca(int ch, int attr, int repeat)␊ |
| 524 | {␊ |
| 525 | ␉bb.intno = 0x10;␊ |
| 526 | ␉bb.ebx.r.h = 0x00; /* page number */␊ |
| 527 | ␉bb.ebx.r.l = attr; /* attribute */␊ |
| 528 | ␉bb.eax.r.h = 0x9;␊ |
| 529 | ␉bb.eax.r.l = ch;␊ |
| 530 | ␉bb.ecx.rx = repeat; /* repeat count */ ␊ |
| 531 | ␉bios(&bb);␊ |
| 532 | }␊ |
| 533 | ␊ |
| 534 | ␊ |
| 535 | //==============================================================================␊ |
| 536 | // Check to see if the passed-in drive is in El Torito no-emulation mode.␊ |
| 537 | ␊ |
| 538 | int is_no_emulation(int drive)␊ |
| 539 | {␊ |
| 540 | ␉struct packet {␊ |
| 541 | ␉␉unsigned char packet_size;␊ |
| 542 | ␉␉unsigned char media_type;␊ |
| 543 | ␉␉unsigned char drive_num;␊ |
| 544 | ␉␉unsigned char ctrlr_index;␊ |
| 545 | ␉␉unsigned long lba;␊ |
| 546 | ␉␉unsigned short device_spec;␊ |
| 547 | ␉␉unsigned short buffer_segment;␊ |
| 548 | ␉␉unsigned short load_segment;␊ |
| 549 | ␉␉unsigned short sector_count;␊ |
| 550 | ␉␉unsigned char cyl_count;␊ |
| 551 | ␉␉unsigned char sec_count;␊ |
| 552 | ␉␉unsigned char head_count;␊ |
| 553 | ␉␉unsigned char reseved;␊ |
| 554 | ␉} __attribute__((packed));␊ |
| 555 | ␉static struct packet pkt;␊ |
| 556 | ␊ |
| 557 | ␉bzero(&pkt, sizeof(pkt));␊ |
| 558 | ␉pkt.packet_size = 0x13;␊ |
| 559 | ␊ |
| 560 | ␉bb.intno = 0x13;␊ |
| 561 | ␉bb.eax.r.h = 0x4b;␊ |
| 562 | ␉bb.eax.r.l = 0x01; // subfunc: get info␊ |
| 563 | ␉bb.edx.r.l = drive;␊ |
| 564 | ␉bb.esi.rr = NORMALIZED_OFFSET((unsigned)&pkt);␊ |
| 565 | ␉bb.ds = NORMALIZED_SEGMENT((unsigned)&pkt);␊ |
| 566 | ␊ |
| 567 | ␉bios(&bb);␊ |
| 568 | ␊ |
| 569 | #if DEBUG␊ |
| 570 | ␉printf("el_torito info drive %x\n", drive);␊ |
| 571 | ␉printf("--> cf %x, eax %x\n", bb.flags.cf, bb.eax.rr);␊ |
| 572 | ␉printf("pkt_size: %x\n", pkt.packet_size);␊ |
| 573 | ␉printf("media_type: %x\n", pkt.media_type);␊ |
| 574 | ␉printf("drive_num: %x\n", pkt.drive_num);␊ |
| 575 | ␉printf("device_spec: %x\n", pkt.device_spec);␊ |
| 576 | ␊ |
| 577 | ␉pause();␊ |
| 578 | #endif␊ |
| 579 | ␊ |
| 580 | ␉/* Some BIOSes erroneously return cf = 1 */␊ |
| 581 | ␉/* Just check to see if the drive number is the same. */␊ |
| 582 | ␉if (pkt.drive_num == drive) {␊ |
| 583 | ␉␉if ((pkt.media_type & 0x0F) == 0) {␊ |
| 584 | ␉␉␉/* We are in no-emulation mode. */␊ |
| 585 | ␉␉␉return 1;␊ |
| 586 | ␉␉}␊ |
| 587 | ␉}␊ |
| 588 | ␉return 0;␊ |
| 589 | }␊ |
| 590 | ␊ |
| 591 | #if DEBUG␊ |
| 592 | /*␊ |
| 593 | * BIOS drive information.␊ |
| 594 | */␊ |
| 595 | static void print_drive_info(boot_drive_info_t *dp)␊ |
| 596 | {␊ |
| 597 | //␉printf("buf_size = %x\n", dp->params.buf_size);␊ |
| 598 | ␉printf("info_flags = %x\n", dp->params.info_flags);␊ |
| 599 | ␉printf("phys_cyls = %lx\n", dp->params. phys_cyls);␊ |
| 600 | ␉printf("phys_heads = %lx\n", dp->params. phys_heads);␊ |
| 601 | ␉printf("phys_spt = %lx\n", dp->params. phys_spt);␊ |
| 602 | ␉printf("phys_sectors = %lx%lx\n", ((unsigned long *)(&dp->params.phys_sectors))[1],␊ |
| 603 | ␉␉ ((unsigned long *)(&dp->params.phys_sectors))[0]);␊ |
| 604 | ␉printf("phys_nbps = %x\n", dp->params.phys_nbps);␊ |
| 605 | //␉printf("dpte_offset = %x\n", dp->params.dpte_offset);␊ |
| 606 | //␉printf("dpte_segment = %x\n", dp->params.dpte_segment);␊ |
| 607 | //␉printf("key = %x\n", dp->params.key);␊ |
| 608 | //␉printf("path_len = %x\n", dp->params. path_len);␊ |
| 609 | //␉printf("reserved1 = %x\n", dp->params. reserved1);␊ |
| 610 | //␉printf("reserved2 = %x\n", dp->params.reserved2);␊ |
| 611 | //␉printf("bus_type[4] = %x\n", dp->params. bus_type[4]);␊ |
| 612 | //␉printf("interface_type[8] = %x\n", dp->params. interface_type[8]);␊ |
| 613 | //␉printf("interface_path[8] = %x\n", dp->params. interface_path[8]);␊ |
| 614 | //␉printf("dev_path[16] = %x\n", dp->params. dev_path[16]);␊ |
| 615 | //␉printf("reserved3 = %x\n", dp->params. reserved3);␊ |
| 616 | //␉printf("checksum = %x\n", dp->params. checksum);␊ |
| 617 | ␉printf("io_port_base = %x\n", dp->dpte.io_port_base);␊ |
| 618 | ␉printf("control_port_base = %x\n", dp->dpte.control_port_base);␊ |
| 619 | ␉printf("head_flags = %x\n", dp->dpte. head_flags);␊ |
| 620 | ␉printf("vendor_info = %x\n", dp->dpte. vendor_info);␊ |
| 621 | ␉printf("irq = %x\n", dp->dpte. irq);␊ |
| 622 | //␉printf("irq_unused = %x\n", dp->dpte. irq_unused);␊ |
| 623 | ␉printf("block_count = %x\n", dp->dpte. block_count);␊ |
| 624 | ␉printf("dma_channe = %x\n", dp->dpte. dma_channel);␊ |
| 625 | ␉printf("dma_type = %x\n", dp->dpte. dma_type);␊ |
| 626 | ␉printf("pio_type = %x\n", dp->dpte. pio_type);␊ |
| 627 | ␉printf("pio_unused = %x\n", dp->dpte. pio_unused);␊ |
| 628 | ␉printf("option_flags = %x\n", dp->dpte.option_flags);␊ |
| 629 | //␉printf("reserved = %x\n", dp->dpte.reserved);␊ |
| 630 | ␉printf("revision = %x\n", dp->dpte. revision);␊ |
| 631 | //␉printf("checksum = %x\n", dp->dpte. checksum);␊ |
| 632 | }␊ |
| 633 | ␊ |
| 634 | #endif␊ |
| 635 | ␊ |
| 636 | //==============================================================================␊ |
| 637 | ␊ |
| 638 | int get_drive_info(int drive, struct driveInfo *dp)␊ |
| 639 | {␊ |
| 640 | ␉int ret = 0;␊ |
| 641 | ␊ |
| 642 | ␉boot_drive_info_t *di = &dp->di;␊ |
| 643 | ␊ |
| 644 | #if UNUSED␊ |
| 645 | ␉if (maxhd == 0) {␊ |
| 646 | ␉␉bb.intno = 0x13;␊ |
| 647 | ␉␉bb.eax.r.h = 0x08;␊ |
| 648 | ␉␉bb.edx.r.l = 0x80;␊ |
| 649 | ␉␉bios(&bb);␊ |
| 650 | ␊ |
| 651 | ␉␉if (bb.flags.cf == 0) {␊ |
| 652 | ␉␉␉maxhd = 0x7f + bb.edx.r.l;␊ |
| 653 | ␉␉}␊ |
| 654 | ␉};␊ |
| 655 | ␊ |
| 656 | ␉if (drive > maxhd) {␊ |
| 657 | ␉␉return 0;␊ |
| 658 | ␉}␊ |
| 659 | #endif␊ |
| 660 | ␊ |
| 661 | ␉bzero(dp, sizeof(struct driveInfo));␊ |
| 662 | ␉dp->biosdev = drive;␊ |
| 663 | ␊ |
| 664 | ␉/* Check for El Torito no-emulation mode. */␊ |
| 665 | ␉dp->no_emulation = is_no_emulation(drive);␊ |
| 666 | ␊ |
| 667 | ␉/* Check drive for EBIOS support. */␊ |
| 668 | ␉bb.intno = 0x13;␊ |
| 669 | ␉bb.eax.r.h = 0x41;␊ |
| 670 | ␉bb.edx.r.l = drive;␊ |
| 671 | ␉bb.ebx.rr = 0x55aa;␊ |
| 672 | ␉bios(&bb);␊ |
| 673 | ␉␊ |
| 674 | ␉if ((bb.ebx.rr == 0xaa55) && (bb.flags.cf == 0)) {␊ |
| 675 | ␉␉/* Get flags for supported operations. */␊ |
| 676 | ␉␉dp->uses_ebios = bb.ecx.r.l;␊ |
| 677 | ␉}␊ |
| 678 | ␉␊ |
| 679 | ␉if (dp->uses_ebios & (EBIOS_ENHANCED_DRIVE_INFO | EBIOS_LOCKING_ACCESS | EBIOS_FIXED_DISK_ACCESS)) {␊ |
| 680 | ␉␉/* Get EBIOS drive info. */␊ |
| 681 | ␉␉static struct drive_params params;␊ |
| 682 | ␉␉␊ |
| 683 | ␉␉params.buf_size = sizeof(params);␊ |
| 684 | ␉␉bb.intno = 0x13;␊ |
| 685 | ␉␉bb.eax.r.h = 0x48;␊ |
| 686 | ␉␉bb.edx.r.l = drive;␊ |
| 687 | ␉␉bb.esi.rr = NORMALIZED_OFFSET((unsigned)¶ms);␊ |
| 688 | ␉␉bb.ds␉ = NORMALIZED_SEGMENT((unsigned)¶ms);␊ |
| 689 | ␉␉bios(&bb);␊ |
| 690 | ␉␉␊ |
| 691 | ␉␉if (bb.flags.cf != 0 /* || params.phys_sectors < 2097152 */) {␊ |
| 692 | ␉␉␉dp->uses_ebios = 0;␊ |
| 693 | ␉␉␉di->params.buf_size = 1;␊ |
| 694 | ␉␉} else {␊ |
| 695 | ␉␉␉bcopy(¶ms, &di->params, sizeof(params));␊ |
| 696 | ␉␉␉␊ |
| 697 | ␉␉␉if (drive >= BASE_HD_DRIVE &&␊ |
| 698 | ␉␉␉␉(dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) &&␊ |
| 699 | ␉␉␉␉di->params.buf_size >= 30 &&␊ |
| 700 | ␉␉␉␉!(di->params.dpte_offset == 0xFFFF && di->params.dpte_segment == 0xFFFF)) {␊ |
| 701 | ␉␉␉␉␉void *ptr = (void *)(di->params.dpte_offset + ((unsigned int)di->params.dpte_segment << 4));␊ |
| 702 | ␉␉␉␉␉bcopy(ptr, &di->dpte, sizeof(di->dpte));␊ |
| 703 | ␉␉␉}␊ |
| 704 | ␉␉}␊ |
| 705 | ␉}␊ |
| 706 | ␊ |
| 707 | /*␊ |
| 708 | * zef: This code will fail on recent JMicron and Intel option ROMs␊ |
| 709 | */ ␊ |
| 710 | //␉if (di->params.phys_heads == 0 || di->params.phys_spt == 0) {␊ |
| 711 | //␉␉/* Either it's not EBIOS, or EBIOS didn't tell us. */␊ |
| 712 | //␉␉bb.intno = 0x13;␊ |
| 713 | //␉␉bb.eax.r.h = 0x08;␊ |
| 714 | //␉␉bb.edx.r.l = drive;␊ |
| 715 | //␉␉bios(&bb);␊ |
| 716 | //␉␉if (bb.flags.cf == 0 && bb.eax.r.h == 0) {␊ |
| 717 | //␉␉␉unsigned long cyl;␊ |
| 718 | //␉␉␉unsigned long sec;␊ |
| 719 | //␉␉␉unsigned long hds;␊ |
| 720 | //␉␉␊ |
| 721 | //␉␉␉hds = bb.edx.r.h;␊ |
| 722 | //␉␉␉sec = bb.ecx.r.l & 0x3F;␊ |
| 723 | //␉␉␉if ((dp->uses_ebios & EBIOS_ENHANCED_DRIVE_INFO) && (sec != 0)) {␊ |
| 724 | //␉␉␉␉cyl = (di->params.phys_sectors / ((hds + 1) * sec)) - 1;␊ |
| 725 | //␉␉␉} else {␊ |
| 726 | //␉␉␉␉cyl = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
| 727 | //␉␉␉}␊ |
| 728 | //␉␉␉di->params.phys_heads = hds; ␊ |
| 729 | //␉␉␉di->params.phys_spt = sec;␊ |
| 730 | //␉␉␉di->params.phys_cyls = cyl;␊ |
| 731 | //␉␉} else {␊ |
| 732 | //␉␉␉ret = -1;␊ |
| 733 | //␉␉}␊ |
| 734 | //␉}␊ |
| 735 | ␊ |
| 736 | ␉if (dp->no_emulation) {␊ |
| 737 | ␉␉/* Some BIOSes give us erroneous EBIOS support information.␊ |
| 738 | ␉ ␉ * Assume that if you're on a CD, then you can use␊ |
| 739 | ␉ ␉ * EBIOS disk calls.␊ |
| 740 | ␉ ␉ */␊ |
| 741 | ␉␉dp->uses_ebios |= EBIOS_FIXED_DISK_ACCESS;␊ |
| 742 | ␉}␊ |
| 743 | #if DEBUG␊ |
| 744 | ␉print_drive_info(di);␊ |
| 745 | ␉printf("uses_ebios = 0x%x\n", dp->uses_ebios);␊ |
| 746 | ␉printf("result %d\n", ret);␊ |
| 747 | ␉pause();␊ |
| 748 | #endif␊ |
| 749 | ␊ |
| 750 | ␉if (ret == 0) {␊ |
| 751 | ␉␉dp->valid = 1;␊ |
| 752 | ␉}␊ |
| 753 | ␉return ret;␊ |
| 754 | }␊ |
| 755 | ␊ |
| 756 | //==============================================================================␊ |
| 757 | ␊ |
| 758 | #if UNUSED␊ |
| 759 | int ebiosEjectMedia(int biosdev)␊ |
| 760 | {␊ |
| 761 | ␉bb.intno = 0x13;␊ |
| 762 | ␉bb.eax.r.h = 0x46;␊ |
| 763 | ␉bb.eax.r.l = 0;␊ |
| 764 | ␉bb.edx.rx = biosdev;␊ |
| 765 | ␉bios(&bb);␊ |
| 766 | ␉return bb.eax.r.h;␊ |
| 767 | }␊ |
| 768 | #endif␊ |
| 769 | ␊ |
| 770 | void setCursorPosition(int x, int y, int page)␊ |
| 771 | {␊ |
| 772 | ␉bb.intno = 0x10;␊ |
| 773 | ␉bb.eax.r.h = 0x02;␊ |
| 774 | ␉bb.ebx.r.h = page; /* page 0 for graphics */␊ |
| 775 | ␉bb.edx.r.l = x;␊ |
| 776 | ␉bb.edx.r.h = y;␊ |
| 777 | ␉bios(&bb);␊ |
| 778 | }␊ |
| 779 | ␊ |
| 780 | void setCursorType(int type)␊ |
| 781 | {␊ |
| 782 | ␉bb.intno = 0x10;␊ |
| 783 | ␉bb.eax.r.h = 0x01;␊ |
| 784 | ␉bb.ecx.rr = type;␊ |
| 785 | ␉bios(&bb);␊ |
| 786 | }␊ |
| 787 | ␊ |
| 788 | void getCursorPositionAndType(int * x, int * y, int * type)␊ |
| 789 | {␊ |
| 790 | ␉bb.intno = 0x10;␊ |
| 791 | ␉bb.eax.r.h = 0x03;␊ |
| 792 | ␉bios(&bb);␊ |
| 793 | ␉*x = bb.edx.r.l;␊ |
| 794 | ␉*y = bb.edx.r.h;␊ |
| 795 | ␉*type = bb.ecx.rr;␊ |
| 796 | }␊ |
| 797 | ␊ |
| 798 | void scollPage(int x1, int y1, int x2, int y2, int attr, int rows, int dir)␊ |
| 799 | {␊ |
| 800 | ␉bb.intno = 0x10;␊ |
| 801 | ␉bb.eax.r.h = (dir > 0) ? 0x06 : 0x07;␊ |
| 802 | ␉bb.eax.r.l = rows;␊ |
| 803 | ␉bb.ebx.r.h = attr;␊ |
| 804 | ␉bb.ecx.r.h = y1;␊ |
| 805 | ␉bb.ecx.r.l = x1;␊ |
| 806 | ␉bb.edx.r.h = y2;␊ |
| 807 | ␉bb.edx.r.l = x2;␊ |
| 808 | ␉bios(&bb);␊ |
| 809 | }␊ |
| 810 | ␊ |
| 811 | void clearScreenRows( int y1, int y2 )␊ |
| 812 | {␊ |
| 813 | ␉scollPage( 0, y1, 80 - 1, y2, 0x07, y2 - y1 + 1, 1 );␊ |
| 814 | }␊ |
| 815 | ␊ |
| 816 | void setActiveDisplayPage( int page )␊ |
| 817 | {␊ |
| 818 | ␉bb.intno = 0x10;␊ |
| 819 | ␉bb.eax.r.h = 5;␊ |
| 820 | ␉bb.eax.r.l = page;␊ |
| 821 | ␉bios(&bb);␊ |
| 822 | }␊ |
| 823 | ␊ |
| 824 | #if DEBUG␊ |
| 825 | ␊ |
| 826 | static int terminateDiskEmulation()␊ |
| 827 | {␊ |
| 828 | ␉static char cd_spec[0x13];␊ |
| 829 | ␊ |
| 830 | ␉bb.intno = 0x13;␊ |
| 831 | ␉bb.eax.r.h = 0x4b;␊ |
| 832 | ␉bb.eax.r.l = 0; // subfunc: terminate emulation ␊ |
| 833 | ␉bb.esi.rr = NORMALIZED_OFFSET((unsigned)&cd_spec);␊ |
| 834 | ␉bb.ds = NORMALIZED_SEGMENT((unsigned)&cd_spec);␊ |
| 835 | ␉bios(&bb);␊ |
| 836 | ␉return bb.eax.r.h;␊ |
| 837 | }␊ |
| 838 | ␊ |
| 839 | static int readDriveParameters(int drive, struct driveParameters *dp)␊ |
| 840 | {␊ |
| 841 | ␉bb.intno = 0x13;␊ |
| 842 | ␉bb.edx.r.l = drive;␊ |
| 843 | ␉bb.eax.r.h = 0x08;␊ |
| 844 | ␉bios(&bb);␊ |
| 845 | ␉if (bb.eax.r.h == 0) {␊ |
| 846 | ␉␉dp->heads = bb.edx.r.h;␊ |
| 847 | ␉␉dp->sectors = bb.ecx.r.l & 0x3F;␊ |
| 848 | ␉␉dp->cylinders = bb.ecx.r.h | ((bb.ecx.r.l & 0xC0) << 2);␊ |
| 849 | ␉␉dp->totalDrives = bb.edx.r.l;␊ |
| 850 | ␉} else {␊ |
| 851 | ␉␉bzero(dp, sizeof(*dp));␊ |
| 852 | ␉}␊ |
| 853 | ␉return bb.eax.r.h;␊ |
| 854 | }␊ |
| 855 | #endif␊ |
| 856 | ␊ |
| 857 | #ifdef APM_SUPPORT␊ |
| 858 | ␊ |
| 859 | #define APM_INTNO 0x15␊ |
| 860 | #define APM_INTCODE 0x53␊ |
| 861 | ␊ |
| 862 | int␊ |
| 863 | APMPresent(void)␊ |
| 864 | {␊ |
| 865 | ␉bb.intno = APM_INTNO;␊ |
| 866 | ␉bb.eax.r.h = APM_INTCODE;␊ |
| 867 | ␉bb.eax.r.l = 0x00;␊ |
| 868 | ␉bb.ebx.rr = 0x0000;␊ |
| 869 | ␉bios(&bb);␊ |
| 870 | ␉if ((bb.flags.cf == 0) && (bb.ebx.r.h == 'P') && (bb.ebx.r.l == 'M')) {␊ |
| 871 | ␉␉/* Success */␊ |
| 872 | ␉␉bootArgs->apmConfig.major_vers = bb.eax.r.h;␊ |
| 873 | ␉␉bootArgs->apmConfig.minor_vers = bb.eax.r.l;␊ |
| 874 | ␉␉bootArgs->apmConfig.flags.data = bb.ecx.rr;␊ |
| 875 | ␉␉return 1;␊ |
| 876 | ␉}␊ |
| 877 | ␉return 0;␊ |
| 878 | }␊ |
| 879 | ␊ |
| 880 | int␊ |
| 881 | APMConnect32(void)␊ |
| 882 | {␊ |
| 883 | ␉bb.intno = APM_INTNO;␊ |
| 884 | ␉bb.eax.r.h = APM_INTCODE;␊ |
| 885 | ␉bb.eax.r.l = 0x03;␊ |
| 886 | ␉bb.ebx.rr = 0x0000;␊ |
| 887 | ␉bios(&bb);␊ |
| 888 | ␉if (bb.flags.cf == 0) {␊ |
| 889 | ␉␉/* Success */␊ |
| 890 | ␉␉bootArgs->apmConfig.cs32_base = (bb.eax.rr) << 4;␊ |
| 891 | ␉␉bootArgs->apmConfig.entry_offset = bb.ebx.rx;␊ |
| 892 | ␉␉bootArgs->apmConfig.cs16_base = (bb.ecx.rr) << 4;␊ |
| 893 | ␉␉bootArgs->apmConfig.ds_base = (bb.edx.rr) << 4;␊ |
| 894 | ␉␉if (bootArgs->apmConfig.major_vers >= 1 && bootArgs->apmConfig.minor_vers >= 1) {␊ |
| 895 | ␉␉␉bootArgs->apmConfig.cs_length = bb.esi.rr;␊ |
| 896 | ␉␉␉bootArgs->apmConfig.ds_length = bb.edi.rr;␊ |
| 897 | ␉␉} else {␊ |
| 898 | ␉␉␉bootArgs->apmConfig.cs_length = ␊ |
| 899 | ␉␉␉bootArgs->apmConfig.ds_length = 64 * 1024;␊ |
| 900 | ␉␉}␊ |
| 901 | ␉␉bootArgs->apmConfig.connected = 1;␊ |
| 902 | ␉␉return 1;␊ |
| 903 | ␉}␊ |
| 904 | ␉return 0;␊ |
| 905 | }␊ |
| 906 | ␊ |
| 907 | #endif /* APM_SUPPORT */␊ |
| 908 | ␊ |
| 909 | #ifdef EISA_SUPPORT␊ |
| 910 | bool eisa_present(void)␊ |
| 911 | {␊ |
| 912 | ␉static bool checked = false;␊ |
| 913 | ␉static bool isEISA;␊ |
| 914 | ␊ |
| 915 | ␉if (!checked) {␊ |
| 916 | ␉␉if (strncmp((char *)0xfffd9, "EISA", 4) == 0) {␊ |
| 917 | ␉␉␉isEISA = true;␊ |
| 918 | ␉␉}␊ |
| 919 | ␉␉checked = true;␊ |
| 920 | ␉}␊ |
| 921 | ␉return (isEISA);␊ |
| 922 | }␊ |
| 923 | ␊ |
| 924 | int␊ |
| 925 | ReadEISASlotInfo(EISA_slot_info_t *ep, int slot)␊ |
| 926 | {␊ |
| 927 | ␉union␊ |
| 928 | ␉{␊ |
| 929 | ␉␉struct␊ |
| 930 | ␉␉{␊ |
| 931 | ␉␉␉unsigned char char2h :2;␊ |
| 932 | ␉␉␉unsigned char char1 :5;␊ |
| 933 | ␉␉␉unsigned char char3 :5;␊ |
| 934 | ␉␉␉unsigned char char2l :3;␊ |
| 935 | ␉␉␉unsigned char d2 :4;␊ |
| 936 | ␉␉␉unsigned char d1 :4;␊ |
| 937 | ␉␉␉unsigned char d4 :4;␊ |
| 938 | ␉␉␉unsigned char d3 :4;␊ |
| 939 | ␉␉} s;␊ |
| 940 | ␉␉unsigned char data[4];␊ |
| 941 | ␉} u;␊ |
| 942 | ␉static char hex[0x10] = "0123456789ABCDEF";␊ |
| 943 | ␊ |
| 944 | ␊ |
| 945 | ␉bb.intno = 0x15;␊ |
| 946 | ␉bb.eax.r.h = 0xd8;␊ |
| 947 | ␉bb.eax.r.l = 0x00;␊ |
| 948 | ␉bb.ecx.r.l = slot;␊ |
| 949 | ␉bios(&bb);␊ |
| 950 | ␉if (bb.flags.cf)␊ |
| 951 | ␉␉return bb.eax.r.h;␊ |
| 952 | ␉ep->u_ID.d = bb.eax.r.l;␊ |
| 953 | ␉ep->configMajor = bb.ebx.r.h;␊ |
| 954 | ␉ep->configMinor = bb.ebx.r.l;␊ |
| 955 | ␉ep->checksum = bb.ecx.rr;␊ |
| 956 | ␉ep->numFunctions = bb.edx.r.h;␊ |
| 957 | ␉ep->u_resources.d = bb.edx.r.l;␊ |
| 958 | ␉u.data[0] = bb.edi.r.l;␊ |
| 959 | ␉u.data[1] = bb.edi.r.h;␊ |
| 960 | ␉u.data[2] = bb.esi.r.l;␊ |
| 961 | ␉u.data[3] = bb.esi.r.h;␊ |
| 962 | ␉ep->id[0] = u.s.char1 + ('A' - 1);␊ |
| 963 | ␉ep->id[1] = (u.s.char2l | (u.s.char2h << 3)) + ('A' - 1);␊ |
| 964 | ␉ep->id[2] = u.s.char3 + ('A' - 1);␊ |
| 965 | ␉ep->id[3] = hex[u.s.d1];␊ |
| 966 | ␉ep->id[4] = hex[u.s.d2];␊ |
| 967 | ␉ep->id[5] = hex[u.s.d3];␊ |
| 968 | ␉ep->id[6] = hex[u.s.d4];␊ |
| 969 | ␉ep->id[7] = 0;␊ |
| 970 | ␉return 0;␊ |
| 971 | }␊ |
| 972 | ␊ |
| 973 | /*␊ |
| 974 | * Note: ep must point to an address below 64k.␊ |
| 975 | */␊ |
| 976 | ␊ |
| 977 | int␊ |
| 978 | ReadEISAFuncInfo(EISA_func_info_t *ep, int slot, int function)␊ |
| 979 | {␊ |
| 980 | ␉bb.intno = 0x15;␊ |
| 981 | ␉bb.eax.r.h = 0xd8;␊ |
| 982 | ␉bb.eax.r.l = 0x01;␊ |
| 983 | ␉bb.ecx.r.l = slot;␊ |
| 984 | ␉bb.ecx.r.h = function;␊ |
| 985 | ␉bb.esi.rr = (unsigned int)ep->data;␊ |
| 986 | ␉bios(&bb);␊ |
| 987 | ␉if (bb.eax.r.h == 0)␊ |
| 988 | ␉{␊ |
| 989 | ␉␉ep->slot = slot;␊ |
| 990 | ␉␉ep->function = function;␊ |
| 991 | ␉}␊ |
| 992 | ␉return bb.eax.r.h;␊ |
| 993 | }␊ |
| 994 | #endif /* EISA_SUPPORT */␊ |
| 995 | ␊ |
| 996 | #if UNUSED␊ |
| 997 | #define PCI_SIGNATURE 0x20494350 /* "PCI " */␊ |
| 998 | ␊ |
| 999 | int␊ |
| 1000 | ReadPCIBusInfo(PCI_bus_info_t *pp)␊ |
| 1001 | {␊ |
| 1002 | ␉bb.intno = 0x1a;␊ |
| 1003 | ␉bb.eax.r.h = 0xb1;␊ |
| 1004 | ␉bb.eax.r.l = 0x01;␊ |
| 1005 | ␉bios(&bb);␊ |
| 1006 | ␉if ((bb.eax.r.h == 0) && (bb.edx.rx == PCI_SIGNATURE))␊ |
| 1007 | ␉{␊ |
| 1008 | ␉␉pp->BIOSPresent = 1;␊ |
| 1009 | ␉␉pp->u_bus.d = bb.eax.r.l;␊ |
| 1010 | ␉␉pp->majorVersion = bb.ebx.r.h;␊ |
| 1011 | ␉␉pp->minorVersion = bb.ebx.r.l;␊ |
| 1012 | ␉␉pp->maxBusNum = bb.ecx.r.l;␊ |
| 1013 | ␉␉return 0;␊ |
| 1014 | ␉}␊ |
| 1015 | ␉return -1;␊ |
| 1016 | }␊ |
| 1017 | #endif␊ |
| 1018 | ␊ |
| 1019 | void sleep(int n)␊ |
| 1020 | {␊ |
| 1021 | ␉// FIXME: doesn't handle midnight wraparound␊ |
| 1022 | ␉unsigned int endtime = (time18() + 18*n);␊ |
| 1023 | #ifdef __i386__␊ |
| 1024 | ␉while (time18() < endtime)␊ |
| 1025 | ␉{␊ |
| 1026 | ␉␉__asm__ volatile ("rep; nop");␊ |
| 1027 | ␉}␊ |
| 1028 | #else␊ |
| 1029 | ␉while (time18() < endtime);␊ |
| 1030 | #endif␊ |
| 1031 | }␊ |
| 1032 | ␊ |
| 1033 | ␊ |
| 1034 | //==============================================================================␊ |
| 1035 | ␊ |
| 1036 | void delay(int us)␊ |
| 1037 | {␊ |
| 1038 | bb.intno = 0x15;␊ |
| 1039 | bb.eax.r.h = 0x86;␊ |
| 1040 | bb.ecx.rr = us >> 16;␊ |
| 1041 | bb.edx.rr = us & 0xFFFF;␊ |
| 1042 | bios(&bb);␊ |
| 1043 | }␊ |
| 1044 | ␊ |
| 1045 | void enableA20(void)␊ |
| 1046 | {␊ |
| 1047 | bzero(&bb, sizeof bb); // Note: may be called before BSS section is initialized␊ |
| 1048 | bb.intno = 0x15;␊ |
| 1049 | bb.eax.rr = 0x2401;␊ |
| 1050 | bios(&bb);␊ |
| 1051 | }␊ |
| 1052 | |
