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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#include "pci.h"␊
62␊
63#include "modules.h"␊
64␊
65#define DEBUG 0␊
66␊
67long gBootMode; /* defaults to 0 == kBootModeNormal */␊
68bool gOverrideKernel;␊
69static char gBootKernelCacheFile[512];␊
70static char gCacheNameAdler[64 + 256];␊
71char *gPlatformName = gCacheNameAdler;␊
72char gRootDevice[512];␊
73char gMKextName[512];␊
74char gMacOSVersion[8];␊
75void *gRootPCIDev;␊
76void *gPlatform;␊
77void *gSMBIOS;␊
78#ifndef OPTION_ROM␊
79bool gEnableCDROMRescan;␊
80bool gScanSingleDrive;␊
81#endif␊
82config_file_t systemVersion;␉␉// system.plist of booting partition␊
83␊
84␊
85int bvCount = 0;␊
86//int␉menucount = 0;␊
87int gDeviceCount = 0; ␊
88␊
89BVRef bvr;␊
90BVRef menuBVR;␊
91BVRef bvChain;␊
92␊
93//static void selectBiosDevice(void);␊
94static unsigned long Adler32(unsigned char *buffer, long length);␊
95static bool getOSVersion(char *str);␊
96␊
97#ifndef OPTION_ROM␊
98static bool gUnloadPXEOnExit = false;␊
99#endif␊
100␊
101/*␊
102 * How long to wait (in seconds) to load the␊
103 * kernel after displaying the "boot:" prompt.␊
104 */␊
105#define kBootErrorTimeout 5␊
106␊
107/*␊
108 * Default path to kernel cache file␊
109 */␊
110 //Slice - first one for Leopard␊
111#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"␊
112#define kDefaultCachePathSnow "/System/Library/Caches/com.apple.kext.caches/Startup/kernelcache"␊
113#define kDefaultCachePathTiger "/System/Library/Extensions.kextcache"␊
114//file://localhost/System/Library/Extensions.kextcache␊
115␊
116␊
117␊
118//==========================================================================␊
119// Zero the BSS.␊
120␊
121static void zeroBSS(void)␊
122{␊
123␉extern char _DATA__bss__begin, _DATA__bss__end;␊
124␉extern char _DATA__common__begin, _DATA__common__end;␊
125␉␊
126␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
127␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
128}␊
129␊
130//==========================================================================␊
131// Malloc error function␊
132␊
133static void malloc_error(char *addr, size_t size, const char *file, int line)␊
134{␊
135␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
136}␊
137␊
138//==========================================================================␊
139//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
140//␊
141void initialize_runtime(void)␊
142{␊
143␉zeroBSS();␊
144␉malloc_init(0, 0, 0, malloc_error);␊
145}␊
146␊
147//==========================================================================␊
148// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
149␊
150int ExecKernel(void *binary)␊
151{␊
152 entry_t kernelEntry;␊
153 int ret;␊
154␉␊
155 bootArgs->kaddr = bootArgs->ksize = 0;␊
156␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
157␊
158 ret = DecodeKernel(binary,␊
159 &kernelEntry,␊
160 (char **) &bootArgs->kaddr,␊
161 (int *)&bootArgs->ksize );␊
162␊
163 if ( ret != 0 )␊
164 return ret;␊
165 // Reserve space for boot args␊
166 reserveKernBootStruct();␊
167␉␊
168 // Load boot drivers from the specifed root path.␊
169␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊
170␊
171␉␊
172␉setupFakeEfi();␊
173␉␊
174 if (!gHaveKernelCache) {␊
175␉␉LoadDrivers("/");␊
176 }␊
177␉␊
178 clearActivityIndicator();␊
179␉␊
180 if (gErrors) {␊
181 msglog("Errors encountered while starting up the computer.\n");␊
182 // printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
183 // sleep(kBootErrorTimeout);␊
184 }␊
185␉␊
186␉md0Ramdisk();␊
187␉␊
188 verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "i386" : "x86_64");␊
189#ifndef OPTION_ROM␊
190 // Cleanup the PXE base code.␊
191␉␊
192 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
193␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
194 {␊
195 ␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
196 sleep(2);␊
197 }␊
198 }␊
199#endif ␊
200 bool dummyVal;␊
201␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal)␊
202␉{␊
203␉␉printf("Press any key to continue...");␊
204␉␉getc();␊
205␉}␊
206␉␉␊
207␉if (bootArgs->Video.v_display == VGA_TEXT_MODE)␊
208␉{␊
209␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
210␉␉// Draw gray screen. NOTE: no boot image, that's in the gui module␊
211#ifndef OPTION_ROM␊
212␉␉if(!gVerboseMode) drawColorRectangle(0, 0, DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT, 0x01); ␊
213#endif␊
214␉}␊
215␊
216␉␊
217␉setupBooterLog();␊
218␉␊
219 finalizeBootStruct();␊
220 ␉␊
221␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
222␊
223␉// Jump to kernel's entry point. There's no going back now.␊
224 startprog( kernelEntry, bootArgs );␊
225␉␊
226 // Not reached␊
227␉␊
228 return 0;␊
229}␊
230␊
231//==========================================================================␊
232// This is the entrypoint from real-mode which functions exactly as it did␊
233// before. Multiboot does its own runtime initialization, does some of its␊
234// own things, and then calls common_boot.␊
235void boot(int biosdev)␊
236{␊
237␉initialize_runtime();␊
238␉// Enable A20 gate before accessing memory above 1Mb.␊
239␉enableA20();␊
240␉common_boot(biosdev);␊
241}␊
242␊
243//==========================================================================␊
244// The 'main' function for the booter. Called by boot0 when booting␊
245// from a block device, or by the network booter.␊
246//␊
247// arguments:␊
248// biosdev - Value passed from boot1/NBP to specify the device␊
249// that the booter was loaded from.␊
250//␊
251// If biosdev is kBIOSDevNetwork, then this function will return if␊
252// booting was unsuccessful. This allows the PXE firmware to try the␊
253// next boot device on its list.␊
254void common_boot(int biosdev)␊
255{␊
256 int status;␊
257␉int␉␉trycache;␊
258 char *bootFile;␊
259 unsigned long adler32;␊
260 bool quiet;␊
261 bool firstRun = true;␊
262 bool instantMenu;␊
263#ifndef OPTION_ROM␊
264 bool rescanPrompt;␊
265#endif␊
266 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
267 unsigned int denyBVFlags = kBVFlagEFISystem;␊
268␉␊
269#ifndef OPTION_ROM␊
270 // Set reminder to unload the PXE base code. Neglect to unload␊
271 // the base code will result in a hang or kernel panic.␊
272 gUnloadPXEOnExit = true;␊
273#endif␊
274␉␊
275 // Record the device that the booter was loaded from.␊
276 gBIOSDev = biosdev & kBIOSDevMask; // 0xff␊
277␉␊
278 // Initialize boot info structure.␊
279 initKernBootStruct();␊
280␉␊
281␉initBooterLog();␊
282␉␊
283 // Setup VGA text mode.␊
284 // Not sure if it is safe to call setVideoMode() before the␊
285 // config table has been loaded. Call video_mode() instead.␊
286#if DEBUG␊
287 printf("before video_mode\n");␊
288#endif␊
289 video_mode( 2 ); // 80x25 mono text mode.␊
290#if DEBUG␊
291 printf("after video_mode\n");␊
292#endif␊
293␉␊
294 // Scan and record the system's hardware information.␊
295 scan_platform();␊
296␉␊
297 // First get info for boot volume.␊
298 scanBootVolumes(gBIOSDev, 0);␊
299 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
300␊
301#if 0␊
302␉ BVRef next; /* list linkage pointer */␊
303 int biosdev; /* BIOS device number */␊
304 int type; /* device type (floppy, hd, network) */␊
305 unsigned int flags; /* attribute flags */␊
306 BVGetDescription description; /* BVGetDescription function */␊
307 int part_no; /* partition number (1 based) */␊
308#endif␊
309#if DEBUG␉␊
310 printf("get bvChain dev=%02x type=%02x part_no=%d\n", bvChain->biosdev, bvChain->type, bvChain->part_no); //dev=0x80 - flash-stick␊
311#endif␊
312␉␊
313 setBootGlobals(bvChain);␊
314␉␊
315 // Load boot.plist config file␊
316 status = loadSystemConfig(&bootInfo->bootConfig);␊
317␊
318 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
319 gBootMode |= kBootModeQuiet;␊
320 }␊
321␉␊
322 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
323 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
324 firstRun = false;␊
325 }␊
326␉␊
327#ifndef OPTION_ROM␊
328␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
329 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
330 gScanSingleDrive = true;␊
331 }␊
332␉␊
333␉// Create a list of partitions on device(s).␊
334 if (gScanSingleDrive)␊
335␉{␊
336␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
337 } ␊
338␉else ␊
339#endif␊
340␉{␊
341␉␉scanDisks(gBIOSDev, &bvCount);␊
342 }␊
343␉␊
344␉// Create a separated bvr chain using the specified filters.␊
345 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
346␉gBootVolume = selectBootVolume(bvChain);␊
347␉␊
348#if DEBUG␉␊
349 printf("separated bvChain dev=%02x type=%02x part_no=%d\n", bvChain->biosdev, bvChain->type, bvChain->part_no); //dev=0x81 - HDD␊
350␉pause();␊
351#endif␊
352␉␊
353␉// Intialize module system␊
354␉if(init_module_system())␊
355␉{␊
356#if DEBUG␉␊
357␉␉printf("begin load_all_modules\n");␊
358␉␉pause();␊
359#endif␊
360␉␉␊
361␉␉load_all_modules();␊
362␉}␊
363␉␊
364␉execute_hook("ModulesLoaded", NULL, NULL, NULL, NULL);␊
365#if DEBUG␊
366 printf("ModulesLoaded\n");␊
367␉pause();␊
368#endif␊
369␉␊
370␉␊
371#ifndef OPTION_ROM␊
372 // Loading preboot ramdisk if exists.␊
373 loadPrebootRAMDisk();␊
374␉␊
375 // Disable rescan option by default␊
376 gEnableCDROMRescan = false;␊
377␉␊
378 // Enable it with Rescan=y in system config␊
379 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
380 gEnableCDROMRescan = true;␊
381 }␊
382␉␊
383 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
384 rescanPrompt = false;␊
385 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
386 gEnableCDROMRescan = promptForRescanOption();␊
387 }␊
388#endif␊
389␉␊
390#if DEBUG␊
391 printf("After rescan\n");␊
392␉pause();␊
393#endif␊
394␉␊
395␉␊
396␉␊
397#if DEBUG␊
398 verbose(" Default: %x, ->biosdev: %x, ->part_no: %d ->flags: %x\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
399 verbose(" bt(0,0): %x, ->biosdev: %x, ->part_no: %d ->flags: %x\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
400 // getc();␊
401␉/* Results␊
402␉ Rescan found 1 HDD and bvCount=4␊
403␉ bvr: 836bc10, dev: 80, part: 4, flags: 4a, vis: 1␊
404␉ bvr: 836bce0, dev: 80, part: 3, flags: 4b, vis: 1␊
405␉ bvr: 836be90, dev: 80, part: 2, flags: 4, vis: 1␊
406␉ bvr: 836bf60, dev: 80, part: 1, flags: a, vis: 0␊
407␉ count: 3␊
408␉ ␊
409␉ foundPrimary and flags bvr1=a bvr2=4b␊
410␉ Default: 836bce0, ->biosdev: 80, ->part_no: 3 ->flags: 4b //booted partition␊
411␉ bt(0,0): 8262030, ->biosdev: 80, ->part_no: 3 ->flags: 4b //unknown pointer␊
412␉␊
413␉ */␊
414#endif␊
415␉␊
416␉␊
417 setBootGlobals(bvChain);␊
418␉␊
419 // Parse args, load and start kernel.␊
420 while (1) {␊
421 const char *val;␊
422 int len;␊
423 // int trycache;␊
424 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
425 int ret = -1;␊
426 void *binary = (void *)kLoadAddr;␊
427 bool tryresume;␊
428 bool tryresumedefault;␊
429 bool forceresume;␊
430␉␉␊
431 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
432 char bootFileSpec[512];␊
433␉␉␊
434 // Initialize globals.␊
435␉␉␊
436 sysConfigValid = false;␊
437 gErrors = false;␊
438 trycache␉␉=␉1;␊
439␉␉␊
440 status = getBootOptions(firstRun);␊
441 firstRun = false;␊
442 if (status == -1) continue;␊
443␉␉␊
444 status = processBootOptions();␊
445 // Status==1 means to chainboot␊
446 if ( status == 1 ) break;␊
447 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
448 if ( status == -1 )␊
449 {␊
450␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
451␉␉␉if(gBootVolume == NULL)␊
452␉␉␉{␊
453␉␉␉␉freeFilteredBVChain(bvChain);␊
454#ifndef OPTION_ROM␊
455␉␉␉␉if (gEnableCDROMRescan)␊
456␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
457#endif␊
458␉␉␉␉␊
459␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
460␉␉␉␉setBootGlobals(bvChain);␊
461␉␉␉}␊
462#if DEBUG␊
463␉␉␉verbose("After rescan\n");␊
464␉␉␉verbose(" System: %x, ->biosdev: %x, ->part_no: %d ->flags: %x\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
465␉␉␉verbose(" Booter: %x, ->biosdev: %x, ->part_no: %d ->flags: %x\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
466␉␉␉// getc();␊
467#endif␊
468␉␉␉␊
469␉␉␉continue;␊
470 }␊
471␉␉␊
472␉␉␊
473␉␉␊
474 // Other status (e.g. 0) means that we should proceed with boot.␊
475␉␉␉␉␊
476␉␉␊
477␉␉// Find out which version mac os we're booting.␊
478␉␉getOSVersion(gMacOSVersion);␊
479␉␉␊
480␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
481␉␉␉archCpuType = CPU_TYPE_X86_64;␊
482␉␉} else {␊
483␉␉␉archCpuType = CPU_TYPE_I386;␊
484␉␉}␊
485␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
486␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
487␉␉␉␉archCpuType = CPU_TYPE_I386;␊
488␉␉␉}␊
489␉␉}␊
490␉␉␊
491␉␉// Notify modules that we are attempting to boot␊
492␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
493␊
494␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
495␉␉␉tryresume = true;␊
496␉␉␉tryresumedefault = true;␊
497␉␉} else {␊
498␉␉␉tryresumedefault = false;␊
499␉␉}␊
500␉␉␊
501␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
502␉␉␉forceresume = false;␊
503␉␉}␊
504␉␉␊
505␉␉if (forceresume) {␊
506␉␉␉tryresume = true;␊
507␉␉␉tryresumedefault = false;␊
508␉␉}␊
509␉␉␊
510␉␉while (tryresume) {␊
511␉␉␉const char *tmp;␊
512␉␉␉BVRef bvr;␊
513␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
514␉␉␉␉val="/private/var/vm/sleepimage";␊
515␉␉␉␊
516␉␉␉// Do this first to be sure that root volume is mounted␊
517␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
518␉␉␉␊
519␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
520␉␉␉␉break;␊
521␉␉␉␊
522␉␉␉// Can't check if it was hibernation Wake=y is required␊
523␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
524␉␉␉␉break;␊
525␉␉␉␊
526␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
527␉␉␉␉break;␊
528␉␉␉␊
529␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
530␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
531␉␉␉␉break;␊
532␉␉␉}␊
533␉␉␉␊
534␉␉␉HibernateBoot((char *)val);␊
535␉␉␉break;␊
536␉␉}␊
537␉␉␊
538 // Reset cache name.␊
539 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
540␉␉␊
541 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
542␉␉␊
543 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
544␉␉␊
545 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig) == true) {␊
546 strlcpy(gBootKernelCacheFile, val, len+1);␊
547 } else {␊
548␉␉␉if(gMacOSVersion[3] == '6') ␊
549␉␉␉␉sprintf(gBootKernelCacheFile, "%s_%s.%08lX", kDefaultCachePathSnow, (archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64", adler32);␊
550␉␉␉else if(gMacOSVersion[3] == '5')␊
551␉␉␉␉sprintf(gBootKernelCacheFile, "%s", kDefaultCachePath);␊
552␉␉␉else␊
553␉␉␉␉sprintf(gBootKernelCacheFile, "%s", kDefaultCachePathTiger);␊
554 }␊
555␉␉verbose("Try cache %s\n", gBootKernelCacheFile);␊
556 // Check for cache file.␊
557 trycache = (((gBootMode & kBootModeSafe) == 0) &&␊
558 !gOverrideKernel &&␊
559 (gBootFileType == kBlockDeviceType) &&␊
560 (gMKextName[0] == '\0') &&␊
561 (gBootKernelCacheFile[0] != '\0') &&␊
562␉␉␉␉␉(gMacOSVersion[3] != '4'));␊
563␉␉␊
564␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
565␉␉␊
566 if (trycache) do {␊
567␉␉␉␊
568 // if we haven't found the kernel yet, don't use the cache␊
569 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
570 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
571 trycache = 0;␊
572 break;␊
573 }␊
574 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
575 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
576 || (cachetime < kerneltime)) {␊
577 trycache = 0;␊
578 break;␊
579 }␊
580 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
581 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
582 && (cachetime < exttime)) {␊
583 trycache = 0;␊
584 break;␊
585 }␊
586 if (kerneltime > exttime) {␊
587 exttime = kerneltime;␊
588 }␊
589 if (cachetime != (exttime + 1)) {␊
590 trycache = 0;␊
591 break;␊
592 }␊
593 } while (0);␊
594␉␉␊
595 do {␊
596 if (trycache) {␊
597 bootFile = gBootKernelCacheFile;␊
598 verbose("Loading kernel cache %s\n", bootFile);␊
599 ret = LoadFile(bootFile);␊
600 binary = (void *)kLoadAddr;␊
601 if (ret >= 0) {␊
602 break;␊
603 }␊
604 }␊
605 bootFile = bootInfo->bootFile;␊
606␉␉␉␊
607 // Try to load kernel image from alternate locations on boot helper partitions.␊
608 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
609 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
610 ␉ ␉ if (ret == -1)␊
611 ␉ ␉ {␊
612␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
613␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
614␉␉␉␉if (ret == -1)␊
615␉␉␉␉{␊
616␉␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
617␉␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
618␉␉␉␉␉if (ret == -1)␊
619␉␉␉␉␉{␊
620␉␉␉␉␉␉// Not found any alternate locations, using the original kernel image path.␊
621␉␉␉␉␉␉strcpy(bootFileSpec, bootFile);␊
622␉␉␉␉␉}␊
623␉␉␉␉}␊
624 }␊
625␉␉␉␊
626 verbose("Loading kernel %s\n", bootFileSpec);␊
627 ret = LoadThinFatFile(bootFileSpec, &binary);␊
628 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
629 {␊
630␉␉␉␉archCpuType = CPU_TYPE_I386;␊
631␉␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
632 }␊
633␉␉␉␊
634 } while (0);␊
635␉␉␊
636 clearActivityIndicator();␊
637#if DEBUG␊
638 printf("Pausing...");␊
639 sleep(8);␊
640#endif␊
641␉␉␊
642 if (ret <= 0) {␊
643␉␉␉printf("Can't find %s\n", bootFile);␊
644␉␉␉␊
645␉␉␉sleep(1);␊
646#ifndef OPTION_ROM␊
647 if (gBootFileType == kNetworkDeviceType) {␊
648 // Return control back to PXE. Don't unload PXE base code.␊
649 gUnloadPXEOnExit = false;␊
650 break;␊
651 }␊
652#endif␊
653 } else {␊
654 /* Won't return if successful. */␊
655␉␉␉// Notify modules that ExecKernel is about to be called␊
656 ret = ExecKernel(binary);␊
657 }␊
658␊
659 } /* while(1) */␊
660 ␊
661 // chainboot␊
662 if (status==1) {␊
663␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
664␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
665␉␉}␊
666 }␊
667#ifndef OPTION_ROM␊
668 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
669␉␉nbpUnloadBaseCode();␊
670 }␊
671#endif␊
672}␊
673␊
674/*!␊
675 Selects a new BIOS device, taking care to update the global state appropriately.␊
676 */␊
677/*␊
678 static void selectBiosDevice(void)␊
679 {␊
680 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
681 CacheReset();␊
682 diskFreeMap(oldMap);␊
683 oldMap = NULL;␊
684 ␊
685 int dev = selectAlternateBootDevice(gBIOSDev);␊
686 ␊
687 BVRef bvchain = scanBootVolumes(dev, 0);␊
688 BVRef bootVol = selectBootVolume(bvchain);␊
689 gBootVolume = bootVol;␊
690 setRootVolume(bootVol);␊
691 gBIOSDev = dev;␊
692 }␊
693 */␊
694␊
695static bool getOSVersion(char *str)␊
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␉␉␉*str = '\0';␊
718␉␉␉strncat(str, 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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