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Root/branches/iFabio/Chameleon/i386/boot2/boot.c

Source at commit 298 created 12 years 10 months ago.
By ifabio, Latest trunk. Also add the Azi modules (Nvidia,AMD,ATI,Intel), added strings into localizable.strings. preparing the "make dmg".
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 "platform.h"␊
61#include "modules.h"␊
62␊
63long gBootMode; /* defaults to 0 == kBootModeNormal */␊
64bool gOverrideKernel;␊
65static char gBootKernelCacheFile[512];␊
66static char gCacheNameAdler[64 + 256];␊
67char *gPlatformName = gCacheNameAdler;␊
68char gRootDevice[512];␊
69char gMKextName[512];␊
70char gMacOSVersion[8];␊
71bool gEnableCDROMRescan;␊
72bool gScanSingleDrive;␊
73␊
74int bvCount = 0;␊
75//int␉␉menucount = 0;␊
76int gDeviceCount = 0; ␊
77␊
78BVRef bvr;␊
79BVRef menuBVR;␊
80BVRef bvChain;␊
81bool useGUI;␊
82␊
83//static void selectBiosDevice(void);␊
84static unsigned long Adler32(unsigned char *buffer, long length);␊
85static bool checkOSVersion(const char * version);␊
86static bool getOSVersion();␊
87␊
88static bool gUnloadPXEOnExit = false;␊
89␊
90/*␊
91 * How long to wait (in seconds) to load the␊
92 * kernel after displaying the "boot:" prompt.␊
93 */␊
94#define kBootErrorTimeout 5␊
95␊
96/*␊
97 * Default path to kernel cache file␊
98 */␊
99//Slice - first one for Leopard␊
100#define kDefaultCachePathLeo "/System/Library/Caches/com.apple.kernelcaches/"␊
101#define kDefaultCachePathSnow "/System/Library/Caches/com.apple.kext.caches/Startup/"␊
102␊
103//==========================================================================␊
104// Zero the BSS.␊
105␊
106static void zeroBSS(void)␊
107{␊
108␉extern char _DATA__bss__begin, _DATA__bss__end;␊
109␉extern char _DATA__common__begin, _DATA__common__end;␊
110␊
111␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
112␉bzero(&_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{␊
120␉stop("\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{␊
128␉zeroBSS();␊
129␉malloc_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␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
142␉␊
143␉ret = DecodeKernel(binary,␊
144␉␉␉␉␉ &kernelEntry,␊
145␉␉␉␉␉ (char **) &bootArgs->kaddr,␊
146␉␉␉␉␉ (int *)&bootArgs->ksize );␊
147␉␊
148␉if ( ret != 0 )␊
149␉␉return ret;␊
150␉␊
151␉// Reserve space for boot args␊
152␉reserveKernBootStruct();␊
153␉␊
154␉// Notify modules that the kernel has been decoded␊
155␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊
156␉␊
157␉// Load boot drivers from the specifed root path.␊
158␉if (!gHaveKernelCache)␊
159␉␉LoadDrivers("/");␊
160␉␊
161␉␊
162␉clearActivityIndicator();␊
163␉␊
164␉if (gErrors) {␊
165␉␉printf("Errors encountered while starting up the computer.\n");␊
166␉␉printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
167␉␉sleep(kBootErrorTimeout);␊
168␉}␊
169␉␊
170␉setupFakeEfi();␊
171␉␊
172␉md0Ramdisk();␊
173␉␊
174␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
175␉␊
176␉// Cleanup the PXE base code.␊
177␉␊
178␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
179␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
180␉␉{␊
181␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
182␉␉␉sleep(2);␊
183␉␉}␊
184␉}␊
185␉␊
186␉bool dummyVal;␊
187␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊
188␉␉printf("Press any key to continue...");␊
189␉␉getc();␊
190␉}␊
191␉␊
192␉usb_loop();␊
193␉␊
194␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
195␉// If we were in text mode, switch to graphics mode.␊
196␉// This will draw the boot graphics unless we are in␊
197␉// verbose mode.␊
198␉␊
199␉if(gVerboseMode)␊
200␉ setVideoMode( GRAPHICS_MODE, 0 );␊
201␉else␊
202␉ drawBootGraphics();␊
203␉␊
204␉setupBooterLog();␊
205␉␊
206␉finalizeBootStruct();␊
207␉␊
208␉if (checkOSVersion("10.7")) {␊
209␊
210␉␉// Masking out so that Lion doesn't doublefault␊
211␉␉outb(0x21, 0xff);␉/* Maskout all interrupts Pic1 */␊
212␉␉outb(0xa1, 0xff);␉/* Maskout all interrupts Pic2 */␊
213␊
214␉␉// Jump to kernel's entry point. There's no going back now.␊
215␊
216␉␉startprog( kernelEntry, bootArgs );␊
217␉}␊
218␉else {␊
219␉␉// Jump to kernel's entry point. There's no going back now.␊
220␉␉␊
221␉␉startprog( kernelEntry, bootArgsPreLion );␊
222␉}␊
223␊
224␉// Not reached␊
225␉return 0;␊
226}␊
227␊
228//==========================================================================␊
229// This is the entrypoint from real-mode which functions exactly as it did␊
230// before. Multiboot does its own runtime initialization, does some of its␊
231// own things, and then calls common_boot.␊
232void boot(int biosdev)␊
233{␊
234␉initialize_runtime();␊
235␉// Enable A20 gate before accessing memory above 1Mb.␊
236␉enableA20();␊
237␉common_boot(biosdev);␊
238}␊
239␊
240//==========================================================================␊
241// The 'main' function for the booter. Called by boot0 when booting␊
242// from a block device, or by the network booter.␊
243//␊
244// arguments:␊
245// biosdev - Value passed from boot1/NBP to specify the device␊
246// that the booter was loaded from.␊
247//␊
248// If biosdev is kBIOSDevNetwork, then this function will return if␊
249// booting was unsuccessful. This allows the PXE firmware to try the␊
250// next boot device on its list.␊
251void common_boot(int biosdev)␊
252{␊
253 int status;␊
254 char *bootFile;␊
255 unsigned long adler32;␊
256 bool quiet;␊
257 bool firstRun = true;␊
258 bool instantMenu;␊
259 bool rescanPrompt;␊
260 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
261 unsigned int denyBVFlags = kBVFlagEFISystem;␊
262␊
263 // Set reminder to unload the PXE base code. Neglect to unload␊
264 // the base code will result in a hang or kernel panic.␊
265 gUnloadPXEOnExit = true;␊
266␊
267 // Record the device that the booter was loaded from.␊
268 gBIOSDev = biosdev & kBIOSDevMask;␊
269␊
270 // Initialize boot info structure.␊
271 initKernBootStruct();␊
272␊
273␉initBooterLog();␊
274␊
275 // Setup VGA text mode.␊
276 // Not sure if it is safe to call setVideoMode() before the␊
277 // config table has been loaded. Call video_mode() instead.␊
278#if DEBUG␊
279 printf("before video_mode\n");␊
280#endif␊
281 video_mode( 2 ); // 80x25 mono text mode.␊
282#if DEBUG␊
283 printf("after video_mode\n");␊
284#endif␊
285␊
286 // Scan and record the system's hardware information.␊
287 scan_platform();␊
288␊
289 // First get info for boot volume.␊
290 scanBootVolumes(gBIOSDev, 0);␊
291 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
292 setBootGlobals(bvChain);␊
293 ␊
294 // Load boot.plist config file␊
295 status = loadSystemConfig(&bootInfo->bootConfig);␊
296␊
297 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
298 gBootMode |= kBootModeQuiet;␊
299 }␊
300␊
301 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
302 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
303 firstRun = false;␊
304 }␊
305␊
306 // Loading preboot ramdisk if exists.␊
307 loadPrebootRAMDisk();␊
308␊
309 // Disable rescan option by default␊
310 gEnableCDROMRescan = false;␊
311␊
312 // Enable it with Rescan=y in system config␊
313 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
314 gEnableCDROMRescan = true;␊
315 }␊
316␊
317 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
318 rescanPrompt = false;␊
319 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
320 gEnableCDROMRescan = promptForRescanOption();␊
321 }␊
322␊
323 // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
324 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
325 gScanSingleDrive = true;␊
326 }␊
327␊
328 // Create a list of partitions on device(s).␊
329 if (gScanSingleDrive) {␊
330 scanBootVolumes(gBIOSDev, &bvCount);␊
331 } else {␊
332 scanDisks(gBIOSDev, &bvCount);␊
333 }␊
334␊
335 // Create a separated bvr chain using the specified filters.␊
336 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
337␊
338 gBootVolume = selectBootVolume(bvChain);␊
339␊
340␉// Intialize module system ␊
341␉init_module_system();␊
342␊
343#if DEBUG␊
344 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
345 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
346 getc();␊
347#endif␊
348␊
349␉useGUI = true;␊
350␉// Override useGUI default␊
351␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊
352␉if (useGUI && initGUI())␊
353␉{␊
354␉␉// initGUI() returned with an error, disabling GUI.␊
355␉␉useGUI = false;␊
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 bool usecache;␊
372␊
373 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
374 char bootFileSpec[512];␊
375␉␉␊
376 // Initialize globals.␊
377␊
378 sysConfigValid = false;␊
379 gErrors = false;␊
380␊
381 status = getBootOptions(firstRun);␊
382 firstRun = false;␊
383 if (status == -1) continue;␊
384␉␉␊
385 status = processBootOptions();␊
386 // Status==1 means to chainboot␊
387 if ( status == 1 ) break;␊
388 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
389 if ( status == -1 )␊
390 {␊
391 // gBootVolume == NULL usually means the user hit escape.␊
392 if(gBootVolume == NULL)␊
393 {␊
394 freeFilteredBVChain(bvChain);␊
395␊
396 if (gEnableCDROMRescan)␊
397 rescanBIOSDevice(gBIOSDev);␊
398 ␊
399 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
400 setBootGlobals(bvChain);␊
401 setupDeviceList(&bootInfo->themeConfig);␊
402 }␊
403 continue;␊
404 }␊
405␉␉␊
406 // Other status (e.g. 0) means that we should proceed with boot.␊
407␉␉␊
408␉␉// Turn off any GUI elements␊
409␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
410␉␉{␊
411␉␉␉gui.devicelist.draw = false;␊
412␉␉␉gui.bootprompt.draw = false;␊
413␉␉␉gui.menu.draw = false;␊
414␉␉␉gui.infobox.draw = false;␊
415␉␉␉gui.logo.draw = false;␊
416␉␉␉drawBackground();␊
417␉␉␉updateVRAM();␊
418␉␉}␊
419␉␉␊
420␉␉// Find out which version mac os we're booting.␊
421␉␉getOSVersion();␊
422␊
423␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
424␉␉␉archCpuType = CPU_TYPE_X86_64;␊
425␉␉} else {␊
426␉␉␉archCpuType = CPU_TYPE_I386;␊
427␉␉}␊
428␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
429␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
430␉␉␉␉archCpuType = CPU_TYPE_I386;␊
431␉␉␉}␊
432␉␉}␊
433␊
434␉␉// Notify moduals that we are attempting to boot␊
435␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
436␊
437␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
438␉␉␉tryresume = true;␊
439␉␉␉tryresumedefault = true;␊
440␉␉} else {␊
441␉␉␉tryresumedefault = false;␊
442␉␉}␊
443␊
444␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
445␉␉␉forceresume = false;␊
446␉␉}␊
447␉␉␊
448␉␉if (forceresume) {␊
449␉␉␉tryresume = true;␊
450␉␉␉tryresumedefault = false;␊
451␉␉}␊
452␉␉␊
453␉␉while (tryresume) {␊
454␉␉␉const char *tmp;␊
455␉␉␉BVRef bvr;␊
456␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
457␉␉␉␉val="/private/var/vm/sleepimage";␊
458␉␉␉␊
459␉␉␉// Do this first to be sure that root volume is mounted␊
460␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
461␊
462␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
463␉␉␉␉break;␊
464␉␉␉␊
465␉␉␉// Can't check if it was hibernation Wake=y is required␊
466␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
467␉␉␉␉break;␊
468␉␉␉␊
469␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
470␉␉␉␉break;␊
471␉␉␉␊
472␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
473␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
474␉␉␉␉break;␊
475␉␉␉}␊
476␊
477␉␉␉HibernateBoot((char *)val);␊
478␉␉␉break;␊
479␉␉}␊
480␊
481␉␉if(getBoolForKey(kUseKernelCache, &usecache, &bootInfo->bootConfig)) {␊
482␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
483␉␉␉␉strlcpy(gBootKernelCacheFile, val, len+1);␊
484␉␉␉}␊
485␉␉␉else {␊
486␉␉␉␉//Lion␊
487␉␉␉␉if (checkOSVersion("10.7")) {␊
488␉␉␉␉␉sprintf(gBootKernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
489␉␉␉␉}␊
490␉␉␉␉// Snow Leopard␊
491␉␉␉␉else if (checkOSVersion("10.6")) {␊
492␉␉␉␉␉sprintf(gBootKernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");␊
493␉␉␉␉␉int lnam = sizeof(gBootKernelCacheFile) + 9; //with adler32␊
494␉␉␉␉␉//Slice - TODO ???␊
495␉␉␉␉␉// e.g. kernelcache_i386.E102928C.qSs0 = "unsaved" cache file.␊
496␉␉␉␉␉//␊
497␉␉␉␉␉// See kext_tools-180.2.1/kextcache_main.c:␊
498␉␉␉␉␉// "Source directory has changed since starting; "␊
499␉ // "not saving cache file %s."␊
500␉␉␉␉␉// or␊
501␉␉␉␉␉// "Source kernel has changed since starting; "␊
502␉ // "not saving cache file %s."␊
503␉␉␉␉␉␊
504␉␉␉␉␉char* name;␊
505␉␉␉␉␉long prev_time = 0;␊
506␉␉␉␉␉␊
507␉␉␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
508␉␉␉␉␉␊
509␉␉␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
510␉␉␉␉␉{␊
511␉␉␉␉␉␉if(((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time && strstr(name, gBootKernelCacheFile) && (name[lnam] != '.'))␊
512␉␉␉␉␉␉{␊
513␉␉␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
514␉␉␉␉␉␉␉prev_time = time;␊
515␉␉␉␉␉␉}␊
516␉␉␉␉␉}␊
517␉␉␉␉}␊
518␉␉␉␉else {␊
519␉␉␉␉␉// Reset cache name.␊
520␉␉␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
521␉␉␉␉␉␊
522␉␉␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
523␉␉␉␉␉␊
524␉␉␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
525␉␉␉␉␉␊
526␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
527␉␉␉␉}␊
528␉␉␉}␊
529␉␉}␊
530␊
531 // Check for cache file.␊
532 trycache = (usecache && ␊
533 ((gBootMode & kBootModeSafe) == 0) &&␊
534 !gOverrideKernel &&␊
535 (gBootFileType == kBlockDeviceType) &&␊
536 (gMKextName[0] == '\0') &&␊
537 (gBootKernelCacheFile[0] != '\0'));␊
538␊
539␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
540␉␉␊
541 if (trycache) do {␊
542␊
543 // if we haven't found the kernel yet, don't use the cache␊
544 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
545 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
546 trycache = 0;␊
547 break;␊
548 }␊
549 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
550 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
551 || (cachetime < kerneltime)) {␊
552 trycache = 0;␊
553 break;␊
554 }␊
555 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
556 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
557 && (cachetime < exttime)) {␊
558 trycache = 0;␊
559 break;␊
560 }␊
561 if (kerneltime > exttime) {␊
562 exttime = kerneltime;␊
563 }␊
564 if (cachetime != (exttime + 1)) {␊
565 trycache = 0;␊
566 break;␊
567 }␊
568 } while (0);␊
569␊
570 do {␊
571 if (trycache) {␊
572 bootFile = gBootKernelCacheFile;␊
573␊
574 verbose("Loading kernel cache %s\n", bootFile);␊
575␊
576 if (checkOSVersion("10.7")) {␊
577 ret = LoadThinFatFile(bootFile, &binary);␊
578␉␉␉␉}␊
579␉␉␉␉else {␊
580 ␉ret = LoadFile(bootFile);␊
581 ␉binary = (void *)kLoadAddr;␊
582␉␉␉␉}␊
583␊
584 if (ret >= 0)␊
585 break;␊
586␊
587␉␉␉␉verbose("Kernel cache did not loaded %s\n ", bootFile);␊
588 }␊
589␊
590 bootFile = bootInfo->bootFile;␊
591␊
592 // Try to load kernel image from alternate locations on boot helper partitions.␊
593 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
594 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
595 ␉ ␉ if (ret == -1)␊
596 ␉ ␉ {␊
597 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
598 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
599 if (ret == -1)␊
600 {␊
601 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
602 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
603 if (ret == -1)␊
604 {␊
605 // No alternate location found. Using the original kernel image path instead.␊
606␉␉␉␉strcpy(bootFileSpec, bootFile);␊
607 }␊
608 }␊
609 }␊
610␊
611 if (checkOSVersion("10.7"))␊
612 {␊
613 //Lion, dont load kernel if haz cache␊
614 if (!trycache) {␊
615 ␉␉verbose("Loading kernel %s\n", bootFileSpec);␊
616 ␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␊
617 ␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
618 ␉␉␉archCpuType = CPU_TYPE_I386;␊
619 ␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
620 ␉␉}␊
621␉␉ } ␊
622␉␉␉␉else ret = 1;␊
623 } ␊
624␉␉␉else {␊
625 //Snow Leopard or older␊
626 verbose("Loading kernel %s\n", bootFileSpec);␊
627 ret = LoadThinFatFile(bootFileSpec, &binary);␊
628 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
629 archCpuType = CPU_TYPE_I386;␊
630 ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
631 }␊
632 }␊
633 } while (0);␊
634␊
635 clearActivityIndicator();␊
636#if DEBUG␊
637 printf("Pausing...");␊
638 sleep(8);␊
639#endif␊
640␊
641 if (ret <= 0) {␊
642␉␉␉printf("Can't find %s\n", bootFile);␊
643␊
644␉␉␉sleep(1);␊
645␊
646 if (gBootFileType == kNetworkDeviceType) {␊
647 // Return control back to PXE. Don't unload PXE base code.␊
648 gUnloadPXEOnExit = false;␊
649 break;␊
650 }␊
651 } else {␊
652 /* Won't return if successful. */␊
653 ret = ExecKernel(binary);␊
654 }␊
655 }␊
656 ␊
657 // chainboot␊
658 if (status==1) {␊
659␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
660␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
661␉␉}␊
662 }␊
663␉␊
664 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
665␉nbpUnloadBaseCode();␊
666 }␊
667}␊
668␊
669/*␊
670 * Selects a new BIOS device, taking care to update the global state appropriately.␊
671 */␊
672/*␊
673static void selectBiosDevice(void)␊
674{␊
675 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
676 CacheReset();␊
677 diskFreeMap(oldMap);␊
678 oldMap = NULL;␊
679␊
680 int dev = selectAlternateBootDevice(gBIOSDev);␊
681␊
682 BVRef bvchain = scanBootVolumes(dev, 0);␊
683 BVRef bootVol = selectBootVolume(bvchain);␊
684 gBootVolume = bootVol;␊
685 setRootVolume(bootVol);␊
686 gBIOSDev = dev;␊
687}␊
688*/␊
689␊
690bool checkOSVersion(const char * version) ␊
691{␊
692␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1]) && (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
693}␊
694␊
695bool getOSVersion()␊
696{␊
697␉bool valid = false;␊
698␉config_file_t systemVersion;␊
699␉const char *val;␊
700␉int len;␊
701␊
702␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
703␉{␊
704␉␉valid = true;␊
705␉}␊
706␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
707␉{␊
708␉␉valid = true;␊
709␉}␊
710␊
711␉if (valid)␊
712␉{␊
713␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
714␉␉{␊
715␉␉␉// getValueForKey uses const char for val␊
716␉␉␉// so copy it and trim␊
717␉␉␉*gMacOSVersion = '\0';␊
718␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊
719␉␉}␊
720␉␉else␊
721␉␉␉valid = false;␊
722␉}␊
723␊
724␉return valid;␊
725}␊
726␊
727#define BASE 65521L /* largest prime smaller than 65536 */␊
728#define NMAX 5000␊
729// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
730␊
731#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
732#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
733#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
734#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
735#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
736␊
737unsigned long Adler32(unsigned char *buf, long len)␊
738{␊
739 unsigned long s1 = 1; // adler & 0xffff;␊
740 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
741 unsigned long result;␊
742 int k;␊
743␊
744 while (len > 0) {␊
745 k = len < NMAX ? len : NMAX;␊
746 len -= k;␊
747 while (k >= 16) {␊
748 DO16(buf);␊
749 buf += 16;␊
750 k -= 16;␊
751 }␊
752 if (k != 0) do {␊
753 s1 += *buf++;␊
754 s2 += s1;␊
755 } while (--k);␊
756 s1 %= BASE;␊
757 s2 %= BASE;␊
758 }␊
759 result = (s2 << 16) | s1;␊
760 return OSSwapHostToBigInt32(result);␊
761}␊
762

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