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

Source at commit 296 created 12 years 10 months ago.
By ifabio, add i386 folder
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␊
226 return 0;␊
227}␊
228␊
229//==========================================================================␊
230// This is the entrypoint from real-mode which functions exactly as it did␊
231// before. Multiboot does its own runtime initialization, does some of its␊
232// own things, and then calls common_boot.␊
233void boot(int biosdev)␊
234{␊
235␉initialize_runtime();␊
236␉// Enable A20 gate before accessing memory above 1Mb.␊
237␉enableA20();␊
238␉common_boot(biosdev);␊
239}␊
240␊
241//==========================================================================␊
242// The 'main' function for the booter. Called by boot0 when booting␊
243// from a block device, or by the network booter.␊
244//␊
245// arguments:␊
246// biosdev - Value passed from boot1/NBP to specify the device␊
247// that the booter was loaded from.␊
248//␊
249// If biosdev is kBIOSDevNetwork, then this function will return if␊
250// booting was unsuccessful. This allows the PXE firmware to try the␊
251// next boot device on its list.␊
252void common_boot(int biosdev)␊
253{␊
254 int status;␊
255 char *bootFile;␊
256 unsigned long adler32;␊
257 bool quiet;␊
258 bool firstRun = true;␊
259 bool instantMenu;␊
260 bool rescanPrompt;␊
261 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
262 unsigned int denyBVFlags = kBVFlagEFISystem;␊
263␊
264 // Set reminder to unload the PXE base code. Neglect to unload␊
265 // the base code will result in a hang or kernel panic.␊
266 gUnloadPXEOnExit = true;␊
267␊
268 // Record the device that the booter was loaded from.␊
269 gBIOSDev = biosdev & kBIOSDevMask;␊
270␊
271 // Initialize boot info structure.␊
272 initKernBootStruct();␊
273␊
274␉initBooterLog();␊
275␊
276 // Setup VGA text mode.␊
277 // Not sure if it is safe to call setVideoMode() before the␊
278 // config table has been loaded. Call video_mode() instead.␊
279#if DEBUG␊
280 printf("before video_mode\n");␊
281#endif␊
282 video_mode( 2 ); // 80x25 mono text mode.␊
283#if DEBUG␊
284 printf("after video_mode\n");␊
285#endif␊
286␊
287 // Scan and record the system's hardware information.␊
288 scan_platform();␊
289␊
290 // First get info for boot volume.␊
291 scanBootVolumes(gBIOSDev, 0);␊
292 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
293 setBootGlobals(bvChain);␊
294 ␊
295 // Load boot.plist config file␊
296 status = loadSystemConfig(&bootInfo->bootConfig);␊
297␊
298 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
299 gBootMode |= kBootModeQuiet;␊
300 }␊
301␊
302 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
303 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
304 firstRun = false;␊
305 }␊
306␊
307 // Loading preboot ramdisk if exists.␊
308 loadPrebootRAMDisk();␊
309␊
310 // Disable rescan option by default␊
311 gEnableCDROMRescan = false;␊
312␊
313 // Enable it with Rescan=y in system config␊
314 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
315 gEnableCDROMRescan = true;␊
316 }␊
317␊
318 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
319 rescanPrompt = false;␊
320 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
321 gEnableCDROMRescan = promptForRescanOption();␊
322 }␊
323␊
324 // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
325 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
326 gScanSingleDrive = true;␊
327 }␊
328␊
329 // Create a list of partitions on device(s).␊
330 if (gScanSingleDrive) {␊
331 scanBootVolumes(gBIOSDev, &bvCount);␊
332 } else {␊
333 scanDisks(gBIOSDev, &bvCount);␊
334 }␊
335␊
336 // Create a separated bvr chain using the specified filters.␊
337 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
338␊
339 gBootVolume = selectBootVolume(bvChain);␊
340␊
341␉// Intialize module system ␊
342␉init_module_system();␊
343␊
344#if DEBUG␊
345 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
346 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
347 getc();␊
348#endif␊
349␊
350␉useGUI = true;␊
351␉// Override useGUI default␊
352␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊
353␉if (useGUI && initGUI())␊
354␉{␊
355␉␉// initGUI() returned with an error, disabling GUI.␊
356␉␉useGUI = false;␊
357␉}␊
358␊
359 setBootGlobals(bvChain);␊
360␊
361 // Parse args, load and start kernel.␊
362 while (1) {␊
363 const char *val;␊
364 int len;␊
365 int trycache;␊
366 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
367 int ret = -1;␊
368 void *binary = (void *)kLoadAddr;␊
369 bool tryresume;␊
370 bool tryresumedefault;␊
371 bool forceresume;␊
372 bool usecache;␊
373␊
374 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
375 char bootFileSpec[512];␊
376␉␉␊
377 // Initialize globals.␊
378␊
379 sysConfigValid = false;␊
380 gErrors = false;␊
381␊
382 status = getBootOptions(firstRun);␊
383 firstRun = false;␊
384 if (status == -1) continue;␊
385␉␉␊
386 status = processBootOptions();␊
387 // Status==1 means to chainboot␊
388 if ( status == 1 ) break;␊
389 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
390 if ( status == -1 )␊
391 {␊
392 // gBootVolume == NULL usually means the user hit escape.␊
393 if(gBootVolume == NULL)␊
394 {␊
395 freeFilteredBVChain(bvChain);␊
396␊
397 if (gEnableCDROMRescan)␊
398 rescanBIOSDevice(gBIOSDev);␊
399 ␊
400 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
401 setBootGlobals(bvChain);␊
402 setupDeviceList(&bootInfo->themeConfig);␊
403 }␊
404 continue;␊
405 }␊
406␉␉␊
407 // Other status (e.g. 0) means that we should proceed with boot.␊
408␉␉␊
409␉␉// Turn off any GUI elements␊
410␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
411␉␉{␊
412␉␉␉gui.devicelist.draw = false;␊
413␉␉␉gui.bootprompt.draw = false;␊
414␉␉␉gui.menu.draw = false;␊
415␉␉␉gui.infobox.draw = false;␊
416␉␉␉gui.logo.draw = false;␊
417␉␉␉drawBackground();␊
418␉␉␉updateVRAM();␊
419␉␉}␊
420␉␉␊
421␉␉// Find out which version mac os we're booting.␊
422␉␉getOSVersion();␊
423␊
424␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
425␉␉␉archCpuType = CPU_TYPE_X86_64;␊
426␉␉} else {␊
427␉␉␉archCpuType = CPU_TYPE_I386;␊
428␉␉}␊
429␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
430␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
431␉␉␉␉archCpuType = CPU_TYPE_I386;␊
432␉␉␉}␊
433␉␉}␊
434␊
435␉␉// Notify moduals that we are attempting to boot␊
436␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
437␊
438␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
439␉␉␉tryresume = true;␊
440␉␉␉tryresumedefault = true;␊
441␉␉} else {␊
442␉␉␉tryresumedefault = false;␊
443␉␉}␊
444␊
445␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
446␉␉␉forceresume = false;␊
447␉␉}␊
448␉␉␊
449␉␉if (forceresume) {␊
450␉␉␉tryresume = true;␊
451␉␉␉tryresumedefault = false;␊
452␉␉}␊
453␉␉␊
454␉␉while (tryresume) {␊
455␉␉␉const char *tmp;␊
456␉␉␉BVRef bvr;␊
457␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
458␉␉␉␉val="/private/var/vm/sleepimage";␊
459␉␉␉␊
460␉␉␉// Do this first to be sure that root volume is mounted␊
461␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
462␊
463␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
464␉␉␉␉break;␊
465␉␉␉␊
466␉␉␉// Can't check if it was hibernation Wake=y is required␊
467␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
468␉␉␉␉break;␊
469␉␉␉␊
470␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
471␉␉␉␉break;␊
472␉␉␉␊
473␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
474␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
475␉␉␉␉break;␊
476␉␉␉}␊
477␊
478␉␉␉HibernateBoot((char *)val);␊
479␉␉␉break;␊
480␉␉}␊
481␊
482␉␉if(getBoolForKey(kUseKernelCache, &usecache, &bootInfo->bootConfig)) {␊
483␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
484␉␉␉␉strlcpy(gBootKernelCacheFile, val, len+1);␊
485␉␉␉}␊
486␉␉␉else {␊
487␉␉␉␉//Lion␊
488␉␉␉␉if (checkOSVersion("10.7")) {␊
489␉␉␉␉␉sprintf(gBootKernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
490␉␉␉␉}␊
491␉␉␉␉// Snow Leopard␊
492␉␉␉␉else if (checkOSVersion("10.6")) {␊
493␉␉␉␉␉sprintf(gBootKernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");␊
494␉␉␉␉␉int lnam = sizeof(gBootKernelCacheFile) + 9; //with adler32␊
495␉␉␉␉␉//Slice - TODO␊
496␉␉␉␉␉/*␊
497␉␉␉␉␉ - but the name is longer .adler32 and more...␊
498␉␉␉␉␉ kernelcache_i386.E102928C.qSs0␊
499␉␉␉␉␉ so will opendir and scan for some files␊
500␉␉␉␉␉ */ ␊
501␉␉␉␉␉char* name;␊
502␉␉␉␉␉long prev_time = 0;␊
503␉␉␉␉␉␊
504␉␉␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
505␉␉␉␉␉␊
506␉␉␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
507␉␉␉␉␉{␊
508␉␉␉␉␉␉if(((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time && strstr(name, gBootKernelCacheFile) && (name[lnam] != '.'))␊
509␉␉␉␉␉␉{␊
510␉␉␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
511␉␉␉␉␉␉␉prev_time = time;␊
512␉␉␉␉␉␉}␊
513␉␉␉␉␉}␊
514␉␉␉␉}␊
515␉␉␉␉else {␊
516␉␉␉␉␉// Reset cache name.␊
517␉␉␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
518␉␉␉␉␉␊
519␉␉␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
520␉␉␉␉␉␊
521␉␉␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
522␉␉␉␉␉␊
523␉␉␉␉␉sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
524␉␉␉␉}␊
525␉␉␉}␊
526␉␉}␊
527␊
528 // Check for cache file.␊
529 trycache = (usecache && ␊
530 ((gBootMode & kBootModeSafe) == 0) &&␊
531 !gOverrideKernel &&␊
532 (gBootFileType == kBlockDeviceType) &&␊
533 (gMKextName[0] == '\0') &&␊
534 (gBootKernelCacheFile[0] != '\0'));␊
535␊
536␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
537␉␉␊
538 if (trycache) do {␊
539␊
540 // if we haven't found the kernel yet, don't use the cache␊
541 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
542 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
543 trycache = 0;␊
544 break;␊
545 }␊
546 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
547 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
548 || (cachetime < kerneltime)) {␊
549 trycache = 0;␊
550 break;␊
551 }␊
552 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
553 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
554 && (cachetime < exttime)) {␊
555 trycache = 0;␊
556 break;␊
557 }␊
558 if (kerneltime > exttime) {␊
559 exttime = kerneltime;␊
560 }␊
561 if (cachetime != (exttime + 1)) {␊
562 trycache = 0;␊
563 break;␊
564 }␊
565 } while (0);␊
566␊
567 do {␊
568 if (trycache) {␊
569 bootFile = gBootKernelCacheFile;␊
570 verbose("Loading kernel cache %s\n", bootFile);␊
571 if (checkOSVersion("10.7")) {␊
572 ret = LoadThinFatFile(bootFile, &binary);␊
573␉␉␉␉}␊
574␉␉␉␉else {␊
575 ␉ret = LoadFile(bootFile);␊
576 ␉binary = (void *)kLoadAddr;␊
577␉␉␉␉}␊
578 if (ret >= 0)␊
579 break;␊
580␉␉␉␉verbose("Kernel cache did not loaded %s\n ", bootFile);␊
581 }␊
582 bootFile = bootInfo->bootFile;␊
583␊
584 // Try to load kernel image from alternate locations on boot helper partitions.␊
585 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
586 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
587 ␉ ␉ if (ret == -1)␊
588 ␉ ␉ {␊
589 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
590 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
591 if (ret == -1)␊
592 {␊
593 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
594 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
595 if (ret == -1)␊
596 {␊
597 // No alternate location found. Using the original kernel image path instead.␊
598␉␉␉␉strcpy(bootFileSpec, bootFile);␊
599 }␊
600 }␊
601 }␊
602␊
603 if (checkOSVersion("10.7"))␊
604 {␊
605 //Lion, dont load kernel if haz cache␊
606 if (!trycache) {␊
607 ␉␉verbose("Loading kernel %s\n", bootFileSpec);␊
608 ␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␊
609 ␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
610 ␉␉␉archCpuType = CPU_TYPE_I386;␊
611 ␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
612 ␉␉}␊
613␉␉ } ␊
614␉␉␉␉else ret = 1;␊
615 } ␊
616␉␉␉else {␊
617 //Snow Leopard or older␊
618 verbose("Loading kernel %s\n", bootFileSpec);␊
619 ret = LoadThinFatFile(bootFileSpec, &binary);␊
620 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64) {␊
621 archCpuType = CPU_TYPE_I386;␊
622 ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
623 }␊
624 }␊
625␉␉␉␊
626 } while (0);␊
627␊
628 clearActivityIndicator();␊
629#if DEBUG␊
630 printf("Pausing...");␊
631 sleep(8);␊
632#endif␊
633␊
634 if (ret <= 0) {␊
635␉␉␉printf("Can't find %s\n", bootFile);␊
636␊
637␉␉␉sleep(1);␊
638␊
639 if (gBootFileType == kNetworkDeviceType) {␊
640 // Return control back to PXE. Don't unload PXE base code.␊
641 gUnloadPXEOnExit = false;␊
642 break;␊
643 }␊
644 } else {␊
645 /* Won't return if successful. */␊
646 ret = ExecKernel(binary);␊
647 }␊
648 }␊
649 ␊
650 // chainboot␊
651 if (status==1) {␊
652␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
653␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
654␉}␊
655 }␊
656␉␊
657 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
658␉nbpUnloadBaseCode();␊
659 }␊
660}␊
661␊
662/*␊
663 * Selects a new BIOS device, taking care to update the global state appropriately.␊
664 */␊
665/*␊
666static void selectBiosDevice(void)␊
667{␊
668 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
669 CacheReset();␊
670 diskFreeMap(oldMap);␊
671 oldMap = NULL;␊
672␊
673 int dev = selectAlternateBootDevice(gBIOSDev);␊
674␊
675 BVRef bvchain = scanBootVolumes(dev, 0);␊
676 BVRef bootVol = selectBootVolume(bvchain);␊
677 gBootVolume = bootVol;␊
678 setRootVolume(bootVol);␊
679 gBIOSDev = dev;␊
680}␊
681*/␊
682␊
683bool checkOSVersion(const char * version) ␊
684{␊
685␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1]) && (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
686}␊
687␊
688bool getOSVersion()␊
689{␊
690␉bool valid = false;␊
691␉config_file_t systemVersion;␊
692␉const char *val;␊
693␉int len;␊
694␊
695␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
696␉{␊
697␉␉valid = true;␊
698␉}␊
699␉else if (!loadConfigFile("System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
700␉{␊
701␉␉valid = true;␊
702␉}␊
703␊
704␉if (valid)␊
705␉{␊
706␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
707␉␉{␊
708␉␉␉// getValueForKey uses const char for val␊
709␉␉␉// so copy it and trim␊
710␉␉␉*gMacOSVersion = '\0';␊
711␉␉␉strncat(gMacOSVersion, val, MIN(len, 4));␊
712␉␉}␊
713␉␉else␊
714␉␉␉valid = false;␊
715␉}␊
716␊
717␉return valid;␊
718}␊
719␊
720#define BASE 65521L /* largest prime smaller than 65536 */␊
721#define NMAX 5000␊
722// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
723␊
724#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
725#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
726#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
727#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
728#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
729␊
730unsigned long Adler32(unsigned char *buf, long len)␊
731{␊
732 unsigned long s1 = 1; // adler & 0xffff;␊
733 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
734 unsigned long result;␊
735 int k;␊
736␊
737 while (len > 0) {␊
738 k = len < NMAX ? len : NMAX;␊
739 len -= k;␊
740 while (k >= 16) {␊
741 DO16(buf);␊
742 buf += 16;␊
743 k -= 16;␊
744 }␊
745 if (k != 0) do {␊
746 s1 += *buf++;␊
747 s2 += s1;␊
748 } while (--k);␊
749 s1 %= BASE;␊
750 s2 %= BASE;␊
751 }␊
752 result = (s2 << 16) | s1;␊
753 return OSSwapHostToBigInt32(result);␊
754}␊
755

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