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Source at commit 608 created 13 years 5 months ago.
By meklort, moved setupFakeEFI to earielr, causes pci to be scaned before modules are called.
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 "platform.h"␊
60#include "graphics.h"␊
61␊
62#include "modules.h"␊
63␊
64long gBootMode; /* defaults to 0 == kBootModeNormal */␊
65bool gOverrideKernel;␊
66static char gBootKernelCacheFile[512];␊
67static char gCacheNameAdler[64 + 256];␊
68char *gPlatformName = gCacheNameAdler;␊
69char gRootDevice[512];␊
70char gMKextName[512];␊
71char gMacOSVersion[8];␊
72#ifndef OPTION_ROM␊
73bool gEnableCDROMRescan;␊
74bool gScanSingleDrive;␊
75#endif␊
76␊
77␊
78int bvCount = 0;␊
79//int␉menucount = 0;␊
80int gDeviceCount = 0; ␊
81␊
82BVRef bvr;␊
83BVRef menuBVR;␊
84BVRef bvChain;␊
85␊
86//static void selectBiosDevice(void);␊
87static unsigned long Adler32(unsigned char *buffer, long length);␊
88static bool getOSVersion(char *str);␊
89␊
90#ifndef OPTION_ROM␊
91static bool gUnloadPXEOnExit = false;␊
92#endif␊
93␊
94/*␊
95 * How long to wait (in seconds) to load the␊
96 * kernel after displaying the "boot:" prompt.␊
97 */␊
98#define kBootErrorTimeout 5␊
99␊
100/*␊
101 * Default path to kernel cache file␊
102 */␊
103#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"␊
104␊
105//==========================================================================␊
106// Zero the BSS.␊
107␊
108static void zeroBSS(void)␊
109{␊
110␉extern char _DATA__bss__begin, _DATA__bss__end;␊
111␉extern char _DATA__common__begin, _DATA__common__end;␊
112␉␊
113␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
114␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
115}␊
116␊
117//==========================================================================␊
118// Malloc error function␊
119␊
120static void malloc_error(char *addr, size_t size, const char *file, int line)␊
121{␊
122␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
123}␊
124␊
125//==========================================================================␊
126//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
127//␊
128void initialize_runtime(void)␊
129{␊
130␉zeroBSS();␊
131␉malloc_init(0, 0, 0, malloc_error);␊
132}␊
133␊
134//==========================================================================␊
135// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
136␊
137static int ExecKernel(void *binary)␊
138{␊
139 entry_t kernelEntry;␊
140 int ret;␊
141␉␊
142 bootArgs->kaddr = bootArgs->ksize = 0;␊
143␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
144␊
145 ret = DecodeKernel(binary,␊
146 &kernelEntry,␊
147 (char **) &bootArgs->kaddr,␊
148 (int *)&bootArgs->ksize );␊
149␊
150 if ( ret != 0 )␊
151 return ret;␊
152␉␊
153 // Reserve space for boot args␊
154 reserveKernBootStruct();␊
155␉␊
156 // Load boot drivers from the specifed root path.␊
157␉␊
158␉␊
159␉setupFakeEfi();␊
160␉␊
161 if (!gHaveKernelCache) {␊
162␉␉LoadDrivers("/");␊
163 }␊
164␉␊
165 clearActivityIndicator();␊
166␉␊
167 if (gErrors) {␊
168 printf("Errors encountered while starting up the computer.\n");␊
169 printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
170 sleep(kBootErrorTimeout);␊
171 }␊
172␉␊
173␉md0Ramdisk();␊
174␉␊
175 verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
176#ifndef OPTION_ROM␊
177 // Cleanup the PXE base code.␊
178␉␊
179 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
180␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
181 {␊
182 ␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
183 sleep(2);␊
184 }␊
185 }␊
186#endif ␊
187 bool dummyVal;␊
188␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊
189␉␉printf("Press any key to continue...");␊
190␉␉getc();␊
191␉}␊
192␉␉␊
193␉if (bootArgs->Video.v_display == VGA_TEXT_MODE)␊
194␉{␊
195␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
196␉␉// Draw gray screen. NOTE: no boot image, that's in the gui module␊
197#ifndef OPTION_ROM␊
198␉␉if(!gVerboseMode) drawColorRectangle(0, 0, DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT, 0x01); ␊
199#endif␊
200␉}␊
201␊
202␉␊
203␉setupBooterLog();␊
204␉␊
205 finalizeBootStruct();␊
206 ␉␊
207␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
208␊
209␉// Jump to kernel's entry point. There's no going back now.␊
210 startprog( kernelEntry, bootArgs );␊
211␉␊
212 // Not reached␊
213␉␊
214 return 0;␊
215}␊
216␊
217//==========================================================================␊
218// This is the entrypoint from real-mode which functions exactly as it did␊
219// before. Multiboot does its own runtime initialization, does some of its␊
220// own things, and then calls common_boot.␊
221void boot(int biosdev)␊
222{␊
223␉initialize_runtime();␊
224␉// Enable A20 gate before accessing memory above 1Mb.␊
225␉enableA20();␊
226␉common_boot(biosdev);␊
227}␊
228␊
229//==========================================================================␊
230// The 'main' function for the booter. Called by boot0 when booting␊
231// from a block device, or by the network booter.␊
232//␊
233// arguments:␊
234// biosdev - Value passed from boot1/NBP to specify the device␊
235// that the booter was loaded from.␊
236//␊
237// If biosdev is kBIOSDevNetwork, then this function will return if␊
238// booting was unsuccessful. This allows the PXE firmware to try the␊
239// next boot device on its list.␊
240void common_boot(int biosdev)␊
241{␊
242 int status;␊
243 char *bootFile;␊
244 unsigned long adler32;␊
245 bool quiet;␊
246 bool firstRun = true;␊
247 bool instantMenu;␊
248#ifndef OPTION_ROM␊
249 bool rescanPrompt;␊
250#endif␊
251 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
252 unsigned int denyBVFlags = kBVFlagEFISystem;␊
253␉␊
254#ifndef OPTION_ROM␊
255 // Set reminder to unload the PXE base code. Neglect to unload␊
256 // the base code will result in a hang or kernel panic.␊
257 gUnloadPXEOnExit = true;␊
258#endif␊
259␉␊
260 // Record the device that the booter was loaded from.␊
261 gBIOSDev = biosdev & kBIOSDevMask;␊
262␉␊
263 // Initialize boot info structure.␊
264 initKernBootStruct();␊
265␉␊
266␉initBooterLog();␊
267␉␊
268 // Setup VGA text mode.␊
269 // Not sure if it is safe to call setVideoMode() before the␊
270 // config table has been loaded. Call video_mode() instead.␊
271#if DEBUG␊
272 printf("before video_mode\n");␊
273#endif␊
274 video_mode( 2 ); // 80x25 mono text mode.␊
275#if DEBUG␊
276 printf("after video_mode\n");␊
277#endif␊
278␉␊
279 // Scan and record the system's hardware information.␊
280 scan_platform();␊
281␉␊
282 // First get info for boot volume.␊
283 scanBootVolumes(gBIOSDev, 0);␊
284 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
285 setBootGlobals(bvChain);␊
286␉␊
287 // Load boot.plist config file␊
288 status = loadSystemConfig(&bootInfo->bootConfig);␊
289␉␊
290 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
291 gBootMode |= kBootModeQuiet;␊
292 }␊
293␉␊
294 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
295 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
296 firstRun = false;␊
297 }␊
298␉␊
299#ifndef OPTION_ROM␊
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␉{␊
308␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
309 } ␊
310␉else ␊
311#endif␊
312␉{␊
313␉␉scanDisks(gBIOSDev, &bvCount);␊
314 }␊
315␉␊
316␉// Create a separated bvr chain using the specified filters.␊
317 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
318␉gBootVolume = selectBootVolume(bvChain);␊
319␉␊
320␉␊
321␉// Intialize module system␊
322␉if(init_module_system())␊
323␉{␊
324␉␉load_all_modules();␊
325␉}␊
326␉␊
327␉␊
328#ifndef OPTION_ROM␊
329 // Loading preboot ramdisk if exists.␊
330 loadPrebootRAMDisk();␊
331␉␊
332 // Disable rescan option by default␊
333 gEnableCDROMRescan = false;␊
334␉␊
335 // Enable it with Rescan=y in system config␊
336 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
337 gEnableCDROMRescan = true;␊
338 }␊
339␉␊
340 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
341 rescanPrompt = false;␊
342 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
343 gEnableCDROMRescan = promptForRescanOption();␊
344 }␊
345#endif␊
346␉␊
347␊
348␉␊
349␉␊
350#if DEBUG␊
351 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
352 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
353 getc();␊
354#endif␊
355␉␊
356␉␊
357␉␊
358 setBootGlobals(bvChain);␊
359␉␊
360 // Parse args, load and start kernel.␊
361 while (1) {␊
362 const char *val;␊
363 int len;␊
364 int trycache;␊
365 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
366 int ret = -1;␊
367 void *binary = (void *)kLoadAddr;␊
368 bool tryresume;␊
369 bool tryresumedefault;␊
370 bool forceresume;␊
371␉␉␊
372 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
373 char bootFileSpec[512];␊
374␉␉␊
375 // Initialize globals.␊
376␉␉␊
377 sysConfigValid = false;␊
378 gErrors = false;␊
379␉␉␊
380 status = getBootOptions(firstRun);␊
381 firstRun = false;␊
382 if (status == -1) continue;␊
383␉␉␊
384 status = processBootOptions();␊
385 // Status==1 means to chainboot␊
386 if ( status == 1 ) break;␊
387 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
388 if ( status == -1 )␊
389 {␊
390␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
391␉␉␉if(gBootVolume == NULL)␊
392␉␉␉{␊
393␉␉␉␉freeFilteredBVChain(bvChain);␊
394#ifndef OPTION_ROM␊
395␉␉␉␉if (gEnableCDROMRescan)␊
396␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
397#endif␊
398␉␉␉␉␊
399␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
400␉␉␉␉setBootGlobals(bvChain);␊
401␉␉␉}␊
402␉␉␉continue;␊
403 }␊
404␉␉␊
405␉␉␊
406␉␉␊
407 // Other status (e.g. 0) means that we should proceed with boot.␊
408␉␉␉␉␊
409␉␉␊
410␉␉// Find out which version mac os we're booting.␊
411␉␉getOSVersion(gMacOSVersion);␊
412␉␉␊
413␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
414␉␉␉archCpuType = CPU_TYPE_X86_64;␊
415␉␉} else {␊
416␉␉␉archCpuType = CPU_TYPE_I386;␊
417␉␉}␊
418␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
419␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
420␉␉␉␉archCpuType = CPU_TYPE_I386;␊
421␉␉␉}␊
422␉␉}␊
423␉␉␊
424␉␉// Notify moduals that we are attempting to boot␊
425␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
426␊
427␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
428␉␉␉tryresume = true;␊
429␉␉␉tryresumedefault = true;␊
430␉␉} else {␊
431␉␉␉tryresumedefault = false;␊
432␉␉}␊
433␉␉␊
434␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
435␉␉␉forceresume = false;␊
436␉␉}␊
437␉␉␊
438␉␉if (forceresume) {␊
439␉␉␉tryresume = true;␊
440␉␉␉tryresumedefault = false;␊
441␉␉}␊
442␉␉␊
443␉␉while (tryresume) {␊
444␉␉␉const char *tmp;␊
445␉␉␉BVRef bvr;␊
446␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
447␉␉␉␉val="/private/var/vm/sleepimage";␊
448␉␉␉␊
449␉␉␉// Do this first to be sure that root volume is mounted␊
450␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
451␉␉␉␊
452␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
453␉␉␉␉break;␊
454␉␉␉␊
455␉␉␉// Can't check if it was hibernation Wake=y is required␊
456␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
457␉␉␉␉break;␊
458␉␉␉␊
459␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
460␉␉␉␉break;␊
461␉␉␉␊
462␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
463␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
464␉␉␉␉break;␊
465␉␉␉}␊
466␉␉␉␊
467␉␉␉HibernateBoot((char *)val);␊
468␉␉␉break;␊
469␉␉}␊
470␉␉␊
471 // Reset cache name.␊
472 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
473␉␉␊
474 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
475␉␉␊
476 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
477␉␉␊
478 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
479 strlcpy(gBootKernelCacheFile, val, len+1);␊
480 } else {␊
481 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);␊
482 }␊
483␉␉␊
484 // Check for cache file.␊
485 trycache = (((gBootMode & kBootModeSafe) == 0) &&␊
486 !gOverrideKernel &&␊
487 (gBootFileType == kBlockDeviceType) &&␊
488 (gMKextName[0] == '\0') &&␊
489 (gBootKernelCacheFile[0] != '\0'));␊
490␉␉␊
491␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
492␉␉␊
493 if (trycache) do {␊
494␉␉␉␊
495 // if we haven't found the kernel yet, don't use the cache␊
496 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
497 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
498 trycache = 0;␊
499 break;␊
500 }␊
501 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
502 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
503 || (cachetime < kerneltime)) {␊
504 trycache = 0;␊
505 break;␊
506 }␊
507 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
508 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
509 && (cachetime < exttime)) {␊
510 trycache = 0;␊
511 break;␊
512 }␊
513 if (kerneltime > exttime) {␊
514 exttime = kerneltime;␊
515 }␊
516 if (cachetime != (exttime + 1)) {␊
517 trycache = 0;␊
518 break;␊
519 }␊
520 } while (0);␊
521␉␉␊
522 do {␊
523 if (trycache) {␊
524 bootFile = gBootKernelCacheFile;␊
525 verbose("Loading kernel cache %s\n", bootFile);␊
526 ret = LoadFile(bootFile);␊
527 binary = (void *)kLoadAddr;␊
528 if (ret >= 0) {␊
529 break;␊
530 }␊
531 }␊
532 bootFile = bootInfo->bootFile;␊
533␉␉␉␊
534 // Try to load kernel image from alternate locations on boot helper partitions.␊
535 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
536 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
537 ␉ ␉ if (ret == -1)␊
538 ␉ ␉ {␊
539␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
540␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
541␉␉␉␉if (ret == -1)␊
542␉␉␉␉{␊
543␉␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
544␉␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
545␉␉␉␉␉if (ret == -1)␊
546␉␉␉␉␉{␊
547␉␉␉␉␉␉// Not found any alternate locations, using the original kernel image path.␊
548␉␉␉␉␉␉strcpy(bootFileSpec, bootFile);␊
549␉␉␉␉␉}␊
550␉␉␉␉}␊
551 }␊
552␉␉␉␊
553 verbose("Loading kernel %s\n", bootFileSpec);␊
554 ret = LoadThinFatFile(bootFileSpec, &binary);␊
555 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
556 {␊
557␉␉␉␉archCpuType = CPU_TYPE_I386;␊
558␉␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
559 }␊
560␉␉␉␊
561 } while (0);␊
562␉␉␊
563 clearActivityIndicator();␊
564#if DEBUG␊
565 printf("Pausing...");␊
566 sleep(8);␊
567#endif␊
568␉␉␊
569 if (ret <= 0) {␊
570␉␉␉printf("Can't find %s\n", bootFile);␊
571␉␉␉␊
572␉␉␉sleep(1);␊
573#ifndef OPTION_ROM␊
574 if (gBootFileType == kNetworkDeviceType) {␊
575 // Return control back to PXE. Don't unload PXE base code.␊
576 gUnloadPXEOnExit = false;␊
577 break;␊
578 }␊
579#endif␊
580 } else {␊
581 /* Won't return if successful. */␊
582␉␉␉// Notify modules that ExecKernel is about to be called␊
583 ret = ExecKernel(binary);␊
584 }␊
585 }␊
586 ␊
587 // chainboot␊
588 if (status==1) {␊
589␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
590␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
591␉␉}␊
592 }␊
593#ifndef OPTION_ROM␊
594 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
595␉␉nbpUnloadBaseCode();␊
596 }␊
597#endif␊
598}␊
599␊
600/*!␊
601 Selects a new BIOS device, taking care to update the global state appropriately.␊
602 */␊
603/*␊
604 static void selectBiosDevice(void)␊
605 {␊
606 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
607 CacheReset();␊
608 diskFreeMap(oldMap);␊
609 oldMap = NULL;␊
610 ␊
611 int dev = selectAlternateBootDevice(gBIOSDev);␊
612 ␊
613 BVRef bvchain = scanBootVolumes(dev, 0);␊
614 BVRef bootVol = selectBootVolume(bvchain);␊
615 gBootVolume = bootVol;␊
616 setRootVolume(bootVol);␊
617 gBIOSDev = dev;␊
618 }␊
619 */␊
620␊
621static bool getOSVersion(char *str)␊
622{␊
623␉bool valid = false;␊
624␉config_file_t systemVersion;␊
625␉const char *val;␊
626␉int len;␊
627␉␊
628␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
629␉{␊
630␉␉valid = true;␊
631␉}␊
632␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
633␉{␊
634␉␉valid = true;␊
635␉}␊
636␉␊
637␉if (valid)␊
638␉{␊
639␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
640␉␉{␊
641␉␉␉// getValueForKey uses const char for val␊
642␉␉␉// so copy it and trim␊
643␉␉␉*str = '\0';␊
644␉␉␉strncat(str, val, MIN(len, 4));␊
645␉␉}␊
646␉␉else␊
647␉␉␉valid = false;␊
648␉}␊
649␉␊
650␉return valid;␊
651}␊
652␊
653#define BASE 65521L /* largest prime smaller than 65536 */␊
654#define NMAX 5000␊
655// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
656␊
657#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
658#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
659#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
660#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
661#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
662␊
663unsigned long Adler32(unsigned char *buf, long len)␊
664{␊
665 unsigned long s1 = 1; // adler & 0xffff;␊
666 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
667 unsigned long result;␊
668 int k;␊
669␉␊
670 while (len > 0) {␊
671 k = len < NMAX ? len : NMAX;␊
672 len -= k;␊
673 while (k >= 16) {␊
674 DO16(buf);␊
675 buf += 16;␊
676 k -= 16;␊
677 }␊
678 if (k != 0) do {␊
679 s1 += *buf++;␊
680 s2 += s1;␊
681 } while (--k);␊
682 s1 %= BASE;␊
683 s2 %= BASE;␊
684 }␊
685 result = (s2 << 16) | s1;␊
686 return OSSwapHostToBigInt32(result);␊
687}␊
688

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