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Source at commit 106 created 10 years 10 months ago.
By diebuche, Adding 915patch and edid
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 * Mach Operating System
26 * Copyright (c) 1990 Carnegie-Mellon University
27 * Copyright (c) 1989 Carnegie-Mellon University
28 * All rights reserved. The CMU software License Agreement specifies
29 * the terms and conditions for use and redistribution.
30 */
31
32/*
33 * INTEL CORPORATION PROPRIETARY INFORMATION
34 *
35 * This software is supplied under the terms of a license agreement or
36 * nondisclosure agreement with Intel Corporation and may not be copied
37 * nor disclosed except in accordance with the terms of that agreement.
38 *
39 * Copyright 1988, 1989 by Intel Corporation
40 */
41
42/*
43 * Copyright 1993 NeXT Computer, Inc.
44 * All rights reserved.
45 */
46
47/*
48 * Completely reworked by Sam Streeper (sam_s@NeXT.com)
49 * Reworked again by Curtis Galloway (galloway@NeXT.com)
50 */
51
52
53#include "boot.h"
54#include "bootstruct.h"
55#include "fake_efi.h"
56#include "sl.h"
57#include "libsa.h"
58#include "ramdisk.h"
59#include "gui.h"
60#include "graphics.h"
61#include "vbe.h"
62#include "915resolution.h"
63#include "edid.h"
64#include "platform.h"
65
66long gBootMode; /* defaults to 0 == kBootModeNormal */
67bool gOverrideKernel;
68static char gBootKernelCacheFile[512];
69static char gCacheNameAdler[64 + 256];
70char *gPlatformName = gCacheNameAdler;
71char gRootDevice[512];
72char gMKextName[512];
73char gMacOSVersion[8];
74bool gEnableCDROMRescan;
75bool gScanSingleDrive;
76
77int bvCount = 0;
78//intmenucount = 0;
79int gDeviceCount = 0;
80
81BVRef bvr;
82BVRef menuBVR;
83BVRef bvChain;
84bool useGUI;
85
86//static void selectBiosDevice(void);
87static unsigned long Adler32(unsigned char *buffer, long length);
88
89
90static bool gUnloadPXEOnExit = false;
91
92/*
93 * How long to wait (in seconds) to load the
94 * kernel after displaying the "boot:" prompt.
95 */
96#define kBootErrorTimeout 5
97
98/*
99 * Default path to kernel cache file
100 */
101#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"
102
103//==========================================================================
104// Zero the BSS.
105
106static void zeroBSS(void)
107{
108extern char _DATA__bss__begin, _DATA__bss__end;
109extern char _DATA__common__begin, _DATA__common__end;
110
111bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));
112bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));
113}
114
115//==========================================================================
116// Malloc error function
117
118static void malloc_error(char *addr, size_t size, const char *file, int line)
119{
120stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);
121}
122
123//==========================================================================
124//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.
125//
126void initialize_runtime(void)
127{
128zeroBSS();
129malloc_init(0, 0, 0, malloc_error);
130}
131
132//==========================================================================
133// execKernel - Load the kernel image (mach-o) and jump to its entry point.
134
135static int ExecKernel(void *binary)
136{
137 entry_t kernelEntry;
138 int ret;
139
140 bootArgs->kaddr = bootArgs->ksize = 0;
141
142 ret = DecodeKernel(binary,
143 &kernelEntry,
144 (char **) &bootArgs->kaddr,
145 (int *)&bootArgs->ksize );
146
147 if ( ret != 0 )
148 return ret;
149
150 // Reserve space for boot args
151 reserveKernBootStruct();
152
153 // Load boot drivers from the specifed root path.
154
155 if (!gHaveKernelCache) {
156 LoadDrivers("/");
157 }
158
159 clearActivityIndicator();
160
161 if (gErrors) {
162 printf("Errors encountered while starting up the computer.\n");
163 printf("Pausing %d seconds...\n", kBootErrorTimeout);
164 sleep(kBootErrorTimeout);
165 }
166
167 setupFakeEfi();
168
169 verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");
170
171 // Cleanup the PXE base code.
172
173 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {
174if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )
175 {
176 printf("nbpUnloadBaseCode error %d\n", (int) ret);
177 sleep(2);
178 }
179 }
180
181 bool dummyVal;
182 if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {
183printf("Press any key to continue...");
184getc();
185 }
186
187 // If we were in text mode, switch to graphics mode.
188 // This will draw the boot graphics unless we are in
189 // verbose mode.
190
191 if(gVerboseMode)
192 setVideoMode( GRAPHICS_MODE, 0 );
193 else
194 drawBootGraphics();
195
196 finalizeBootStruct();
197
198 // Jump to kernel's entry point. There's no going back now.
199
200 startprog( kernelEntry, bootArgs );
201
202 // Not reached
203
204 return 0;
205}
206
207//==========================================================================
208// This is the entrypoint from real-mode which functions exactly as it did
209// before. Multiboot does its own runtime initialization, does some of its
210// own things, and then calls common_boot.
211void boot(int biosdev)
212{
213initialize_runtime();
214// Enable A20 gate before accessing memory above 1Mb.
215enableA20();
216common_boot(biosdev);
217}
218
219//==========================================================================
220// The 'main' function for the booter. Called by boot0 when booting
221// from a block device, or by the network booter.
222//
223// arguments:
224// biosdev - Value passed from boot1/NBP to specify the device
225// that the booter was loaded from.
226//
227// If biosdev is kBIOSDevNetwork, then this function will return if
228// booting was unsuccessful. This allows the PXE firmware to try the
229// next boot device on its list.
230void common_boot(int biosdev)
231{
232 int status;
233 char *bootFile;
234 unsigned long adler32;
235 bool quiet;
236 bool firstRun = true;
237 bool instantMenu;
238 bool rescanPrompt;
239 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;
240 unsigned int denyBVFlags = kBVFlagEFISystem;
241
242 // Set reminder to unload the PXE base code. Neglect to unload
243 // the base code will result in a hang or kernel panic.
244 gUnloadPXEOnExit = true;
245
246 // Record the device that the booter was loaded from.
247 gBIOSDev = biosdev & kBIOSDevMask;
248
249 // Initialize boot info structure.
250 initKernBootStruct();
251
252 // Setup VGA text mode.
253 // Not sure if it is safe to call setVideoMode() before the
254 // config table has been loaded. Call video_mode() instead.
255#if DEBUG
256 printf("before video_mode\n");
257#endif
258 video_mode( 2 ); // 80x25 mono text mode.
259#if DEBUG
260 printf("after video_mode\n");
261#endif
262
263 // Scan and record the system's hardware information.
264 scan_platform();
265
266 // First get info for boot volume.
267 scanBootVolumes(gBIOSDev, 0);
268 bvChain = getBVChainForBIOSDev(gBIOSDev);
269 setBootGlobals(bvChain);
270
271 // Load boot.plist config file
272 status = loadSystemConfig(&bootInfo->bootConfig);
273
274 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {
275 gBootMode |= kBootModeQuiet;
276 }
277
278 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config
279 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {
280 firstRun = false;
281 }
282
283 // Loading preboot ramdisk if exists.
284 loadPrebootRAMDisk();
285
286 // Disable rescan option by default
287 gEnableCDROMRescan = false;
288
289 // Enable it with Rescan=y in system config
290 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {
291 gEnableCDROMRescan = true;
292 }
293
294 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.
295 rescanPrompt = false;
296 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {
297 gEnableCDROMRescan = promptForRescanOption();
298 }
299
300 // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.
301 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {
302 gScanSingleDrive = true;
303 }
304
305 // Create a list of partitions on device(s).
306 if (gScanSingleDrive) {
307 scanBootVolumes(gBIOSDev, &bvCount);
308 } else {
309 scanDisks(gBIOSDev, &bvCount);
310 }
311
312 // Create a separated bvr chain using the specified filters.
313 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);
314
315 gBootVolume = selectBootVolume(bvChain);
316
317#if DEBUG
318 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);
319 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);
320 getc();
321#endif
322
323 useGUI = true;
324 // Override useGUI default
325 getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);
326
327
328
329// Before initGui, path the video bios with the correct resolution
330
331 UInt32 x = 0, y = 0;
332 UInt32 bp = 0;
333
334 getResolution(&x, &y, &bp);
335
336
337 if (x!=0 && y!=0) {
338 vbios_map * map;
339
340 map = open_vbios(CT_UNKWN);
341
342 unlock_vbios(map);
343
344 set_mode(map, x, y, bp, 0, 0);
345
346 relock_vbios(map);
347
348 close_vbios(map);
349
350 verbose("Patched first resolution mode to %dx%d.\n", x, y);
351
352
353 }
354
355
356 //printf("Press any key to continue...");
357 //getc();
358
359// Try initialising the GUI unless disabled
360
361
362if (useGUI) {
363 /* XXX AsereBLN handle error */
364initGUI();
365 }
366
367 setBootGlobals(bvChain);
368
369 // Parse args, load and start kernel.
370 while (1) {
371 const char *val;
372 int len;
373 int trycache;
374 long flags, cachetime, kerneltime, exttime, sleeptime, time;
375 int ret = -1;
376 void *binary = (void *)kLoadAddr;
377 bool tryresume;
378 bool tryresumedefault;
379 bool forceresume;
380
381 config_file_t systemVersion;// system.plist of booting partition
382
383 // additional variable for testing alternate kernel image locations on boot helper partitions.
384 char bootFileSpec[512];
385
386 // Initialize globals.
387
388 sysConfigValid = false;
389 gErrors = false;
390
391 status = getBootOptions(firstRun);
392 firstRun = false;
393 if (status == -1) continue;
394
395 status = processBootOptions();
396 // Status==1 means to chainboot
397 if ( status == 1 ) break;
398 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL
399 if ( status == -1 )
400 {
401 // gBootVolume == NULL usually means the user hit escape.
402 if(gBootVolume == NULL)
403 {
404 freeFilteredBVChain(bvChain);
405
406 if (gEnableCDROMRescan)
407 rescanBIOSDevice(gBIOSDev);
408
409 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);
410 setBootGlobals(bvChain);
411 }
412 continue;
413 }
414
415 // Other status (e.g. 0) means that we should proceed with boot.
416
417if( bootArgs->Video.v_display == GRAPHICS_MODE )
418drawBackground();
419
420 // Found and loaded a config file. Proceed with boot.
421
422// Turn off any GUI elements
423if( bootArgs->Video.v_display == GRAPHICS_MODE )
424{
425gui.devicelist.draw = false;
426gui.bootprompt.draw = false;
427gui.menu.draw = false;
428gui.infobox.draw = false;
429drawBackground();
430updateVRAM();
431}
432
433// Find out which version mac os we're booting.
434if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion)) {
435if (getValueForKey(kProductVersion, &val, &len, &systemVersion)) {
436// getValueForKey uses const char for val
437// so copy it and trim
438strncpy(gMacOSVersion, val, MIN(len, 4));
439gMacOSVersion[MIN(len, 4)] = '\0';
440}
441}
442
443if (platformCPUFeature(CPU_FEATURE_EM64T)) {
444archCpuType = CPU_TYPE_X86_64;
445} else {
446archCpuType = CPU_TYPE_I386;
447}
448if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {
449if (strncmp(val, "i386", 4) == 0) {
450archCpuType = CPU_TYPE_I386;
451}
452}
453if (getValueForKey(k32BitModeFlag, &val, &len, &bootInfo->bootConfig)) {
454archCpuType = CPU_TYPE_I386;
455}
456
457if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {
458tryresume = true;
459tryresumedefault = true;
460} else {
461tryresumedefault = false;
462}
463
464if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {
465forceresume = false;
466}
467
468if (forceresume) {
469tryresume = true;
470tryresumedefault = false;
471}
472
473while (tryresume) {
474const char *tmp;
475BVRef bvr;
476if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))
477val="/private/var/vm/sleepimage";
478
479// Do this first to be sure that root volume is mounted
480ret = GetFileInfo(0, val, &flags, &sleeptime);
481
482if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)
483break;
484
485// Can't check if it was hibernation Wake=y is required
486if (bvr->modTime == 0 && tryresumedefault)
487break;
488
489if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))
490break;
491
492if (!forceresume && ((sleeptime+3) < bvr->modTime)) {
493printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);
494break;
495}
496
497HibernateBoot((char *)val);
498break;
499}
500
501 // Reset cache name.
502 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);
503
504 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);
505
506 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));
507
508 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {
509 strlcpy(gBootKernelCacheFile, val, len+1);
510 } else {
511 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);
512 }
513
514 // Check for cache file.
515 trycache = (((gBootMode & kBootModeSafe) == 0) &&
516 !gOverrideKernel &&
517 (gBootFileType == kBlockDeviceType) &&
518 (gMKextName[0] == '\0') &&
519 (gBootKernelCacheFile[0] != '\0'));
520
521verbose("Loading Darwin %s\n", gMacOSVersion);
522
523 if (trycache) do {
524
525 // if we haven't found the kernel yet, don't use the cache
526 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);
527 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {
528 trycache = 0;
529 break;
530 }
531 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);
532 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)
533 || (cachetime < kerneltime)) {
534 trycache = 0;
535 break;
536 }
537 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);
538 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)
539 && (cachetime < exttime)) {
540 trycache = 0;
541 break;
542 }
543 if (kerneltime > exttime) {
544 exttime = kerneltime;
545 }
546 if (cachetime != (exttime + 1)) {
547 trycache = 0;
548 break;
549 }
550 } while (0);
551
552 do {
553 if (trycache) {
554 bootFile = gBootKernelCacheFile;
555 verbose("Loading kernel cache %s\n", bootFile);
556 ret = LoadFile(bootFile);
557 binary = (void *)kLoadAddr;
558 if (ret >= 0) {
559 break;
560 }
561 }
562 bootFile = bootInfo->bootFile;
563
564 // Try to load kernel image from alternate locations on boot helper partitions.
565 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);
566 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time);
567 if (ret == -1)
568 {
569 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);
570 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time);
571 if (ret == -1)
572 {
573 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);
574 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time);
575 if (ret == -1)
576 {
577 // Not found any alternate locations, using the original kernel image path.
578 strcpy(bootFileSpec, bootFile);
579 }
580 }
581 }
582
583 verbose("Loading kernel %s\n", bootFileSpec);
584 ret = LoadThinFatFile(bootFileSpec, &binary);
585 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)
586 {
587 archCpuType = CPU_TYPE_I386;
588 ret = LoadThinFatFile(bootFileSpec, &binary);
589 }
590
591 } while (0);
592
593 clearActivityIndicator();
594#if DEBUG
595 printf("Pausing...");
596 sleep(8);
597#endif
598
599 if (ret <= 0) {
600printf("Can't find %s\n", bootFile);
601
602if(gui.initialised) {
603sleep(1);
604drawBackground();
605gui.devicelist.draw = true;
606gui.redraw = true;
607}
608 if (gBootFileType == kNetworkDeviceType) {
609 // Return control back to PXE. Don't unload PXE base code.
610 gUnloadPXEOnExit = false;
611 break;
612 }
613 } else {
614 /* Won't return if successful. */
615 ret = ExecKernel(binary);
616 }
617 }
618
619 // chainboot
620 if (status==1) {
621if (getVideoMode() == GRAPHICS_MODE) {// if we are already in graphics-mode,
622setVideoMode(VGA_TEXT_MODE, 0);// switch back to text mode
623}
624 }
625
626 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {
627nbpUnloadBaseCode();
628 }
629}
630
631/*!
632 Selects a new BIOS device, taking care to update the global state appropriately.
633 */
634/*
635static void selectBiosDevice(void)
636{
637 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);
638 CacheReset();
639 diskFreeMap(oldMap);
640 oldMap = NULL;
641
642 int dev = selectAlternateBootDevice(gBIOSDev);
643
644 BVRef bvchain = scanBootVolumes(dev, 0);
645 BVRef bootVol = selectBootVolume(bvchain);
646 gBootVolume = bootVol;
647 setRootVolume(bootVol);
648 gBIOSDev = dev;
649}
650*/
651
652#define BASE 65521L /* largest prime smaller than 65536 */
653#define NMAX 5000
654// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1
655
656#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
657#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
658#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
659#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
660#define DO16(buf) DO8(buf,0); DO8(buf,8);
661
662unsigned long Adler32(unsigned char *buf, long len)
663{
664 unsigned long s1 = 1; // adler & 0xffff;
665 unsigned long s2 = 0; // (adler >> 16) & 0xffff;
666 unsigned long result;
667 int k;
668
669 while (len > 0) {
670 k = len < NMAX ? len : NMAX;
671 len -= k;
672 while (k >= 16) {
673 DO16(buf);
674 buf += 16;
675 k -= 16;
676 }
677 if (k != 0) do {
678 s1 += *buf++;
679 s2 += s1;
680 } while (--k);
681 s1 %= BASE;
682 s2 %= BASE;
683 }
684 result = (s2 << 16) | s1;
685 return OSSwapHostToBigInt32(result);
686}
687

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