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Root/trunk/i386/boot2/boot.c

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/* ␊
26 * Mach Operating System␊
27 * Copyright (c) 1990 Carnegie-Mellon University␊
28 * Copyright (c) 1989 Carnegie-Mellon University␊
29 * All rights reserved.␉ The CMU software License Agreement specifies␊
30 * the terms and conditions for use and redistribution.␊
31 */␊
32␊
33/*␊
34 *␉␉␉INTEL CORPORATION PROPRIETARY INFORMATION␊
35 *␊
36 *␉This software is supplied under the terms of a license␉agreement or ␊
37 *␉nondisclosure agreement with Intel Corporation and may not be copied ␊
38 *␉nor disclosed except in accordance with the terms of that agreement.␊
39 *␊
40 *␉Copyright 1988, 1989 by Intel Corporation␊
41 */␊
42␊
43/*␊
44 * Copyright 1993 NeXT Computer, Inc.␊
45 * All rights reserved.␊
46 */␊
47␊
48/*␊
49 * Completely reworked by Sam Streeper (sam_s@NeXT.com)␊
50 * Reworked again by Curtis Galloway (galloway@NeXT.com)␊
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␊
63/*␊
64 * How long to wait (in seconds) to load the␊
65 * kernel after displaying the "boot:" prompt.␊
66 */␊
67#define kBootErrorTimeout 5␊
68␊
69bool␉␉gOverrideKernel, gEnableCDROMRescan, gScanSingleDrive, useGUI;␊
70static bool␉gUnloadPXEOnExit = false;␊
71␊
72static char␉gCacheNameAdler[64 + 256];␊
73char␉␉*gPlatformName = gCacheNameAdler;␊
74␊
75char␉␉gRootDevice[ROOT_DEVICE_SIZE];␊
76char␉␉gMKextName[512];␊
77char␉␉gMacOSVersion[8];␊
78int␉␉␉bvCount = 0, gDeviceCount = 0;␊
79//int␉␉menucount = 0;␊
80long␉␉gBootMode; /* defaults to 0 == kBootModeNormal */␊
81BVRef␉␉bvr, menuBVR, bvChain;␊
82␊
83static bool␉␉␉␉checkOSVersion(const char * version);␊
84static void␉␉␉␉getOSVersion();␊
85static unsigned long␉Adler32(unsigned char *buffer, long length);␊
86//static void␉␉␉selectBiosDevice(void);␊
87␊
88/** options.c **/␊
89extern char* msgbuf;␊
90void showTextBuffer(char *buf, int size);␊
91␊
92␊
93//==========================================================================␊
94// Zero the BSS.␊
95␊
96static void zeroBSS(void)␊
97{␊
98␉extern char _DATA__bss__begin, _DATA__bss__end;␊
99␉extern char _DATA__common__begin, _DATA__common__end;␊
100␉␊
101␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
102␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
103}␊
104␊
105//==========================================================================␊
106// Malloc error function␊
107␊
108static void malloc_error(char *addr, size_t size, const char *file, int line)␊
109{␊
110␉stop("\nMemory allocation error! Addr: 0x%x, Size: 0x%x, File: %s, Line: %d\n",␊
111␉␉␉␉␉␉␉␉␉ (unsigned)addr, (unsigned)size, file, line);␊
112}␊
113␊
114//==========================================================================␊
115//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
116//␊
117void initialize_runtime(void)␊
118{␊
119␉zeroBSS();␊
120␉malloc_init(0, 0, 0, malloc_error);␊
121}␊
122␊
123//==========================================================================␊
124// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
125␊
126static int ExecKernel(void *binary)␊
127{␊
128␉int␉␉␉ret;␊
129␉entry_t␉␉kernelEntry;␊
130␉␊
131␉bootArgs->kaddr = bootArgs->ksize = 0;␊
132␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
133␉␊
134␉ret = DecodeKernel(binary,␊
135␉␉␉␉␉ &kernelEntry,␊
136␉␉␉␉␉ (char **) &bootArgs->kaddr,␊
137␉␉␉␉␉ (int *)&bootArgs->ksize );␊
138␉␊
139␉if ( ret != 0 )␊
140␉␉return ret;␊
141␉␊
142␉// Reserve space for boot args␊
143␉reserveKernBootStruct();␊
144␉␊
145␉// Notify modules that the kernel has been decoded␊
146␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊
147␉␊
148␉setupFakeEfi();␊
149␉␊
150␉// Load boot drivers from the specifed root path.␊
151␉//if (!gHaveKernelCache)␊
152␉LoadDrivers("/");␊
153␉␊
154␉execute_hook("DriversLoaded", (void*)binary, NULL, NULL, NULL);␊
155␉␊
156␉clearActivityIndicator();␊
157␉␊
158␉if (gErrors) {␊
159␉␉printf("Errors encountered while starting up the computer.\n");␊
160␉␉printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
161␉␉sleep(kBootErrorTimeout);␊
162␉}␊
163␉␊
164␉md0Ramdisk();␊
165␉␊
166␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
167␉verbose("Boot Args: %s\n", bootArgs->CommandLine);␊
168␊
169␉// Cleanup the PXE base code.␊
170␉␊
171␉if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
172␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
173␉␉{␊
174␉␉␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
175␉␉␉sleep(2);␊
176␉␉}␊
177␉}␊
178␉␊
179␉bool dummyVal;␊
180␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->chameleonConfig) && dummyVal) {␊
181␉␉showTextBuffer(msgbuf, strlen(msgbuf));␊
182␉}␊
183␉␊
184␉usb_loop();␊
185␊
186␉// If we were in text mode, switch to graphics mode.␊
187␉// This will draw the boot graphics unless we are in␊
188␉// verbose mode.␊
189␉if (gVerboseMode)␊
190␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
191␉else␊
192␉␉drawBootGraphics();␊
193␉␊
194␉setupBooterLog();␊
195␉␊
196␉finalizeBootStruct();␊
197␉␊
198␉// Jump to kernel's entry point. There's no going back now.␊
199␉if ((checkOSVersion("10.7")) || (checkOSVersion("10.8"))) {␊
200␉␉␊
201␉␉// Notify modules that the kernel is about to be started␊
202␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␊
203␊
204␉␉// Masking out so that Lion doesn't doublefault␊
205␉␉outb(0x21, 0xff);␉/* Maskout all interrupts Pic1 */␊
206␉␉outb(0xa1, 0xff);␉/* Maskout all interrupts Pic2 */␊
207␉␉␊
208␉␉startprog( kernelEntry, bootArgs );␊
209␉}␊
210␉else {␊
211␉␉// Notify modules that the kernel is about to be started␊
212␉␉execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgsPreLion, NULL, NULL);␊
213␊
214␉␉startprog( kernelEntry, bootArgsPreLion );␊
215␉}␊
216␉␊
217␉// Not reached␊
218␉return 0;␊
219}␊
220␊
221␊
222//==========================================================================␊
223// LoadKernelCache - Try to load Kernel Cache.␊
224// return the length of the loaded cache file or -1 on error␊
225long LoadKernelCache(const char* cacheFile, void **binary) {␊
226␉char␉␉kernelCacheFile[512];␊
227␉char␉␉kernelCachePath[512];␊
228␉long␉␉flags, time, cachetime, kerneltime, exttime, ret=-1;␊
229 unsigned long adler32;␊
230␊
231 if((gBootMode & kBootModeSafe) != 0)␊
232 {␊
233␉␉verbose("Kernel Cache ignored.\n");␊
234␉␉return -1;␊
235 }␊
236␊
237␉// Use specify kernel cache file if not empty␊
238␉if (cacheFile[0] != 0)␊
239␉␉strlcpy(kernelCacheFile, cacheFile, sizeof(kernelCacheFile));␊
240␉else {␊
241 ␉␉// Lion and Mountain Lion prelink kernel cache file␊
242␉␉if ((checkOSVersion("10.7")) || (checkOSVersion("10.8"))) {␊
243␉␉␉sprintf(kernelCacheFile, "%skernelcache", kDefaultCachePathSnow);␊
244␉␉}␊
245␉␉// Snow Leopard prelink kernel cache file␊
246␉␉else if (checkOSVersion("10.6")) {␊
247␉␉␉sprintf(kernelCacheFile, "kernelcache_%s", (archCpuType == CPU_TYPE_I386)␊
248␉␉␉␉␉? "i386" : "x86_64");␊
249␉␉␉int lnam = strlen(kernelCacheFile) + 9; //with adler32␊
250␊
251␉␉␉char* name;␊
252␉␉␉long prev_time = 0;␊
253␊
254␉␉␉struct dirstuff* cacheDir = opendir(kDefaultCachePathSnow);␊
255␊
256␉␉␉while(readdir(cacheDir, (const char**)&name, &flags, &time) >= 0)␊
257␉␉␉{␊
258␉␉␉␉if (((flags & kFileTypeMask) != kFileTypeDirectory) && time > prev_time␊
259␉␉␉␉␉&& strstr(name, kernelCacheFile) && (name[lnam] != '.'))␊
260␉␉␉␉{␊
261␉␉␉␉␉sprintf(kernelCacheFile, "%s%s", kDefaultCachePathSnow, name);␊
262␉␉␉␉␉prev_time = time;␊
263␉␉␉␉}␊
264␉␉␉}␊
265␉␉}␊
266␉␉else {␊
267␉␉␉// Reset cache name.␊
268␉␉␉bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
269␉␉␉sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
270␉␉␉adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
271␉␉␉sprintf(kernelCacheFile, "%s.%08lX", kDefaultCachePathLeo, adler32);␊
272␉␉}␊
273␉}␊
274␊
275␉// Check if the kernel cache file exists␊
276␉ret = -1;␊
277␊
278␉// If boot from a boot helper partition check the kernel cache file on it␊
279␉if (gBootVolume->flags & kBVFlagBooter) {␊
280␉␉sprintf(kernelCachePath, "com.apple.boot.P%s", kernelCacheFile);␊
281␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
282␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
283␉␉{␊
284␉␉␉sprintf(kernelCachePath, "com.apple.boot.R%s", kernelCacheFile);␊
285␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
286␉␉␉if ((ret == -1) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
287␉␉␉{␊
288␉␉␉␉sprintf(kernelCachePath, "com.apple.boot.S%s", kernelCacheFile);␊
289␉␉␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
290␉␉␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
291␉␉␉␉␉ret = -1;␊
292␉␉␉}␊
293␉␉}␊
294␉}␊
295␉// If not found, use the original kernel cache path.␊
296␉if (ret == -1) {␊
297␉␉strcpy(kernelCachePath, kernelCacheFile);␊
298␉␉ret = GetFileInfo(NULL, kernelCachePath, &flags, &cachetime);␊
299␉␉if ((flags & kFileTypeMask) != kFileTypeFlat)␊
300␉␉␉ret = -1;␊
301␉}␊
302␊
303␉// Exit if kernel cache file wasn't found␊
304␉if (ret == -1) {␊
305␉␉verbose("No Kernel Cache File '%s' found\n", kernelCacheFile);␊
306␉␉return -1;␊
307␉}␊
308␊
309␉// Check if the kernel cache file is more recent (mtime)␊
310␉// than the kernel file or the S/L/E directory␊
311␉ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
312␉// Check if the kernel file is more recent than the cache file␊
313␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeFlat)␊
314␉␉&& (kerneltime > cachetime)) {␊
315␉␉verbose("Kernel file (%s) is more recent than KernelCache (%s), ignoring KernelCache\n",␊
316␉␉␉␉bootInfo->bootFile, kernelCacheFile);␊
317␉␉return -1;␊
318␉}␊
319␊
320␉ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
321␉// Check if the S/L/E directory time is more recent than the cache file␊
322␉if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
323␉␉&& (exttime > cachetime)) {␊
324␉␉verbose("/System/Library/Extensions is more recent than KernelCache (%s), ignoring KernelCache\n",␊
325␉␉␉␉kernelCacheFile);␊
326␉␉return -1;␊
327␉}␊
328␊
329␉// Since the kernel cache file exists and is the most recent try to load it␊
330␉verbose("Loading kernel cache %s\n", kernelCachePath);␊
331␊
332␉if (checkOSVersion("10.7") || checkOSVersion("10.8")) {␊
333␉␉ret = LoadThinFatFile(kernelCachePath, binary);␊
334␉} else {␊
335␉␉ret = LoadFile(kernelCachePath);␊
336␉␉*binary = (void *)kLoadAddr;␊
337␉}␊
338␉return ret; // ret contain the length of the binary␊
339}␊
340␊
341//==========================================================================␊
342// This is the entrypoint from real-mode which functions exactly as it did␊
343// before. Multiboot does its own runtime initialization, does some of its␊
344// own things, and then calls common_boot.␊
345void boot(int biosdev)␊
346{␊
347␉initialize_runtime();␊
348␉// Enable A20 gate before accessing memory above 1Mb.␊
349␉enableA20();␊
350␉common_boot(biosdev);␊
351}␊
352␊
353//==========================================================================␊
354// The 'main' function for the booter. Called by boot0 when booting␊
355// from a block device, or by the network booter.␊
356//␊
357// arguments:␊
358//␉ biosdev - Value passed from boot1/NBP to specify the device␊
359//␉␉␉ that the booter was loaded from.␊
360//␊
361// If biosdev is kBIOSDevNetwork, then this function will return if␊
362// booting was unsuccessful. This allows the PXE firmware to try the␊
363// next boot device on its list.␊
364void common_boot(int biosdev)␊
365{␊
366␉bool␉ ␉␉quiet;␊
367␉bool␉ ␉␉firstRun = true;␊
368␉bool␉ ␉␉instantMenu;␊
369␉bool␉ ␉␉rescanPrompt;␊
370␉int␉␉␉␉status;␊
371␉unsigned int␉allowBVFlags = kBVFlagSystemVolume | kBVFlagForeignBoot;␊
372␉unsigned int␉denyBVFlags = kBVFlagEFISystem;␊
373␉␊
374␉// Set reminder to unload the PXE base code. Neglect to unload␊
375␉// the base code will result in a hang or kernel panic.␊
376␉gUnloadPXEOnExit = true;␊
377␉␊
378␉// Record the device that the booter was loaded from.␊
379␉gBIOSDev = biosdev & kBIOSDevMask;␊
380␉␊
381␉// Initialize boot info structure.␊
382␉initKernBootStruct();␊
383␉␊
384␉initBooterLog();␊
385␉␊
386␉// Setup VGA text mode.␊
387␉// Not sure if it is safe to call setVideoMode() before the␊
388␉// config table has been loaded. Call video_mode() instead.␊
389#if DEBUG␊
390␉printf("before video_mode\n");␊
391#endif␊
392␉video_mode( 2 ); // 80x25 mono text mode.␊
393#if DEBUG␊
394␉printf("after video_mode\n");␊
395#endif␊
396␉␊
397␉// Scan and record the system's hardware information.␊
398␉scan_platform();␊
399␉␊
400␉// First get info for boot volume.␊
401␉scanBootVolumes(gBIOSDev, 0);␊
402␉bvChain = getBVChainForBIOSDev(gBIOSDev);␊
403␉setBootGlobals(bvChain);␊
404␉␊
405␉// Load boot.plist config file␊
406␉status = loadChameleonConfig(&bootInfo->chameleonConfig);␊
407␉␊
408␉if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->chameleonConfig) && quiet) {␊
409␉␉gBootMode |= kBootModeQuiet;␊
410␉}␊
411␉␊
412␉// Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
413␉if (getBoolForKey(kInstantMenuKey, &instantMenu, &bootInfo->chameleonConfig) && instantMenu) {␊
414␉␉firstRun = false;␊
415␉}␊
416␉␊
417␉// Loading preboot ramdisk if exists.␊
418␉loadPrebootRAMDisk();␊
419␉␊
420␉// Disable rescan option by default␊
421␉gEnableCDROMRescan = false;␊
422␉␊
423␉// Enable it with Rescan=y in system config␊
424␉if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->chameleonConfig)␊
425␉␉&& gEnableCDROMRescan) {␊
426␉␉gEnableCDROMRescan = true;␊
427␉}␊
428␉␊
429␉// Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
430␉rescanPrompt = false;␊
431␉if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->chameleonConfig)␊
432␉␉&& rescanPrompt && biosDevIsCDROM(gBIOSDev))␊
433␉{␊
434␉␉gEnableCDROMRescan = promptForRescanOption();␊
435␉}␊
436␉␊
437␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
438␉if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->chameleonConfig)␊
439␉␉&& gScanSingleDrive) {␊
440␉␉gScanSingleDrive = true;␊
441␉}␊
442␉␊
443␉// Create a list of partitions on device(s).␊
444␉if (gScanSingleDrive) {␊
445␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
446␉} else {␊
447␉␉scanDisks(gBIOSDev, &bvCount);␊
448␉}␊
449␉␊
450␉// Create a separated bvr chain using the specified filters.␊
451␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
452␉␊
453␉gBootVolume = selectBootVolume(bvChain);␊
454␉␊
455␉// Intialize module system ␊
456␉init_module_system();␊
457␉␉␊
458#if DEBUG␊
459␉printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
460␉␉␉ gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
461␉printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n",␊
462␉␉␉ gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
463␉getchar();␊
464#endif␊
465␉␊
466␉useGUI = true;␊
467␉// Override useGUI default␊
468␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->chameleonConfig);␊
469␉if (useGUI && initGUI())␊
470␉{␊
471␉␉// initGUI() returned with an error, disabling GUI.␊
472␉␉useGUI = false;␊
473␉}␊
474␉␊
475␉setBootGlobals(bvChain);␊
476␉␊
477␉// Parse args, load and start kernel.␊
478␉while (1)␊
479␉{␊
480␉␉bool␉␉tryresume, tryresumedefault, forceresume;␊
481␉␉bool␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
482␉␉const char␉*val;␊
483␉␉int␉␉␉len, ret = -1;␊
484␉␉long␉␉flags, sleeptime, time;␊
485␉␉void␉␉*binary = (void *)kLoadAddr;␊
486␉␉␊
487␉␉char bootFile[sizeof(bootInfo->bootFile)];␊
488␉␉char␉␉bootFilePath[512];␊
489␉␉char␉␉kernelCacheFile[512];␊
490␊
491␉␉// Initialize globals.␊
492␉␉sysConfigValid = false;␊
493␉␉gErrors␉␉ = false;␊
494␉␉␊
495␉␉status = getBootOptions(firstRun);␊
496␉␉firstRun = false;␊
497␉␉if (status == -1) continue;␊
498␉␉ ␊
499␉␉status = processBootOptions();␊
500␉␉// Status == 1 means to chainboot␊
501␉␉if ( status ==␉1 ) break;␊
502␉␉// Status == -1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
503␉␉if ( status == -1 )␊
504␉␉{␊
505␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
506␉␉␉if (gBootVolume == NULL)␊
507␉␉␉{␊
508␉␉␉␉freeFilteredBVChain(bvChain);␊
509␉␉␉␉␊
510␉␉␉␉if (gEnableCDROMRescan)␊
511␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
512␉␉␉␉␊
513␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
514␉␉␉␉setBootGlobals(bvChain);␊
515␉␉␉␉setupDeviceList(&bootInfo->themeConfig);␊
516␉␉␉}␊
517␉␉␉continue;␊
518␉␉}␊
519␉␉␊
520␉␉// Other status (e.g. 0) means that we should proceed with boot.␊
521␉␉␊
522␉␉// Turn off any GUI elements␊
523␉␉if ( bootArgs->Video.v_display == GRAPHICS_MODE )␊
524␉␉{␊
525␉␉␉gui.devicelist.draw = false;␊
526␉␉␉gui.bootprompt.draw = false;␊
527␉␉␉gui.menu.draw = false;␊
528␉␉␉gui.infobox.draw = false;␊
529␉␉␉gui.logo.draw = false;␊
530␉␉␉drawBackground();␊
531␉␉␉updateVRAM();␊
532␉␉}␊
533␉␉␊
534␉␉// Find out which version mac os we're booting.␊
535␉␉getOSVersion();␊
536␉␉␊
537␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
538␉␉␉archCpuType = CPU_TYPE_X86_64;␊
539␉␉} else {␊
540␉␉␉archCpuType = CPU_TYPE_I386;␊
541␉␉}␊
542␉␉␊
543␉␉if (getValueForKey(karch, &val, &len, &bootInfo->chameleonConfig)) {␊
544␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
545␉␉␉␉archCpuType = CPU_TYPE_I386;␊
546␉␉␉}␊
547␉␉}␊
548␉␉␊
549␉␉if (getValueForKey(kKernelArchKey, &val, &len, &bootInfo->chameleonConfig)) {␊
550␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
551␉␉␉␉archCpuType = CPU_TYPE_I386;␊
552␉␉␉}␊
553␉␉}␊
554␉␉␊
555␉␉// Notify modules that we are attempting to boot␊
556␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
557␉␉␊
558␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->chameleonConfig)) {␊
559␉␉␉tryresume = true;␊
560␉␉␉tryresumedefault = true;␊
561␉␉} else {␊
562␉␉␉tryresumedefault = false;␊
563␉␉}␊
564␉␉␊
565␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->chameleonConfig)) {␊
566␉␉␉forceresume = false;␊
567␉␉}␊
568␉␉␊
569␉␉if (forceresume) {␊
570␉␉␉tryresume = true;␊
571␉␉␉tryresumedefault = false;␊
572␉␉}␊
573␉␉␊
574␉␉while (tryresume) {␊
575␉␉␉const char *tmp;␊
576␉␉␉BVRef bvr;␊
577␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->chameleonConfig))␊
578␉␉␉␉val = "/private/var/vm/sleepimage";␊
579␉␉␉␊
580␉␉␉// Do this first to be sure that root volume is mounted␊
581␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
582␉␉␉␊
583␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
584␉␉␉␉break;␊
585␉␉␉␊
586␉␉␉// Can't check if it was hibernation Wake=y is required␊
587␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
588␉␉␉␉break;␊
589␉␉␉␊
590␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
591␉␉␉␉break;␊
592␉␉␉␊
593␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
594#if DEBUG␉␊
595␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",␊
596␉␉␉␉␉␉bvr->modTime-sleeptime);␊
597#endif␉␉␉␉ ␊
598␉␉␉␉break;␊
599␉␉␉}␊
600␉␉␉␊
601␉␉␉HibernateBoot((char *)val);␊
602␉␉␉break;␊
603␉␉}␊
604␉␉␊
605␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
606␊
607␉␉// If boot from boot helper partitions and OS is Lion use prelink kernel.␊
608␉␉// We need to find a solution to load extra mkext with a prelink kernel.␊
609␉␉if (gBootVolume->flags & kBVFlagBooter && (checkOSVersion("10.7") || checkOSVersion("10.8")))␊
610␉␉␉useKernelCache = true;␊
611␉␉else␊
612␉␉␉useKernelCache = false; // by default don't use prelink kernel cache␊
613␊
614␉␉getBoolForKey(kUseKernelCache, &useKernelCache, &bootInfo->chameleonConfig);␊
615␊
616␉␉if (useKernelCache) do {␊
617␊
618␉␉␉// Determine the name of the Kernel Cache␊
619␉␉␉if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
620␉␉␉␉if (val[0] == '\\')␊
621␉␉␉␉{␊
622␉␉␉␉␉len--;␊
623␉␉␉␉␉val++;␊
624␉␉␉␉}␊
625␉␉␉␉strlcpy(kernelCacheFile, val, len + 1);␊
626␉␉␉} else {␊
627␉␉␉␉kernelCacheFile[0] = 0; // Use default kernel cache file␊
628␉␉␉}␊
629␊
630␉␉␉if (gOverrideKernel && kernelCacheFile[0] == 0) {␊
631␉␉␉␉verbose("Using a non default kernel (%s) without specifying 'Kernel Cache' path, KernelCache will not be used\n",␊
632␉␉␉␉␉␉bootInfo->bootFile);␊
633␉␉␉␉useKernelCache = false;␊
634␉␉␉␉break;␊
635␉␉␉}␊
636␉␉␉if (gMKextName[0] != 0) {␊
637␉␉␉␉verbose("Using a specific MKext Cache (%s), KernelCache will not be used\n",␊
638␉␉␉␉␉␉gMKextName);␊
639␉␉␉␉useKernelCache = false;␊
640␉␉␉␉break;␊
641␉␉␉}␊
642␉␉␉if (gBootFileType != kBlockDeviceType)␊
643␉␉␉␉useKernelCache = false;␊
644␊
645␉␉} while(0);␊
646␊
647␉␉do {␊
648␉␉␉if (useKernelCache) {␊
649␉␉␉␉ret = LoadKernelCache(kernelCacheFile, &binary);␊
650␉␉␉␉if (ret >= 0)␊
651␉␉␉␉␉break;␊
652␉␉␉}␊
653␊
654␉␉␉bool bootFileWithDevice = false;␊
655␉␉␉// Check if bootFile start with a device ex: bt(0,0)/Extra/mach_kernel␊
656␉␉␉if (strncmp(bootInfo->bootFile,"bt(",3) == 0 ||␊
657␉␉␉␉strncmp(bootInfo->bootFile,"hd(",3) == 0 ||␊
658␉␉␉␉strncmp(bootInfo->bootFile,"rd(",3) == 0)␊
659␉␉␉␉bootFileWithDevice = true;␊
660␊
661␉␉␉// bootFile must start with a / if it not start with a device name␊
662␉␉␉if (!bootFileWithDevice && (bootInfo->bootFile)[0] != '/')␊
663␉␉␉␉sprintf(bootFile, "/%s", bootInfo->bootFile); // append a leading /␊
664␉␉␉else␊
665␉␉␉␉strlcpy(bootFile, bootInfo->bootFile, sizeof(bootFile));␊
666␊
667␉␉␉// Try to load kernel image from alternate locations on boot helper partitions.␊
668␉␉␉ret = -1;␊
669␉␉␉if ((gBootVolume->flags & kBVFlagBooter) && !bootFileWithDevice) {␊
670␉␉␉␉sprintf(bootFilePath, "com.apple.boot.P%s", bootFile);␊
671␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
672␉␉␉␉if (ret == -1)␊
673␉␉␉␉{␊
674␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.R%s", bootFile);␊
675␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
676␉␉␉␉␉if (ret == -1)␊
677␉␉␉␉␉{␊
678␉␉␉␉␉␉sprintf(bootFilePath, "com.apple.boot.S%s", bootFile);␊
679␉␉␉␉␉␉ret = GetFileInfo(NULL, bootFilePath, &flags, &time);␊
680␉␉␉␉␉}␊
681␉␉␉␉}␊
682␉␉␉}␊
683␉␉␉if (ret == -1) {␊
684␉␉␉␉// No alternate location found, using the original kernel image path.␊
685␉␉␉␉strlcpy(bootFilePath, bootFile,sizeof(bootFilePath));␊
686␉␉␉}␊
687␉␉␉␊
688␉␉␉verbose("Loading kernel %s\n", bootFilePath);␊
689␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
690␉␉␉if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
691␉␉␉{␊
692␉␉␉␉archCpuType = CPU_TYPE_I386;␊
693␉␉␉␉ret = LoadThinFatFile(bootFilePath, &binary);␊
694␉␉␉}␊
695␉␉} while (0);␊
696␉␉␊
697␉␉clearActivityIndicator();␊
698␉␉␊
699#if DEBUG␊
700␉␉printf("Pausing...");␊
701␉␉sleep(8);␊
702#endif␊
703␉␉␊
704␉␉if (ret <= 0) {␊
705␉␉␉printf("Can't find %s\n", bootFile);␊
706␉␉␉sleep(1);␊
707␉␉␉␊
708␉␉␉if (gBootFileType == kNetworkDeviceType) {␊
709␉␉␉␉// Return control back to PXE. Don't unload PXE base code.␊
710␉␉␉␉gUnloadPXEOnExit = false;␊
711␉␉␉␉break;␊
712␉␉␉}␊
713␉␉␉pause();␊
714␊
715␉␉} else {␊
716␉␉␉/* Won't return if successful. */␊
717␉␉␉ret = ExecKernel(binary);␊
718␉␉}␊
719␉}␊
720␉␊
721␉// chainboot␊
722␉if (status == 1) {␊
723␉␉// if we are already in graphics-mode,␊
724␉␉if (getVideoMode() == GRAPHICS_MODE) {␊
725␉␉␉setVideoMode(VGA_TEXT_MODE, 0); // switch back to text mode.␊
726␉␉}␊
727␉}␊
728␉␊
729␉if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
730␉␉nbpUnloadBaseCode();␊
731␉}␊
732}␊
733␊
734/*!␊
735␉Selects a new BIOS device, taking care to update the global state appropriately.␊
736 */␊
737/*␊
738static void selectBiosDevice(void)␊
739{␊
740␉struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
741␉CacheReset();␊
742␉diskFreeMap(oldMap);␊
743␉oldMap = NULL;␊
744␉␊
745␉int dev = selectAlternateBootDevice(gBIOSDev);␊
746␉␊
747␉BVRef bvchain = scanBootVolumes(dev, 0);␊
748␉BVRef bootVol = selectBootVolume(bvchain);␊
749␉gBootVolume = bootVol;␊
750␉setRootVolume(bootVol);␊
751␉gBIOSDev = dev;␊
752}␊
753*/␊
754␊
755bool checkOSVersion(const char * version) ␊
756{␊
757␉return ((gMacOSVersion[0] == version[0]) && (gMacOSVersion[1] == version[1])␊
758␉␉␉&& (gMacOSVersion[2] == version[2]) && (gMacOSVersion[3] == version[3]));␊
759}␊
760␊
761static void getOSVersion()␊
762{␊
763␉strlcpy(gMacOSVersion, gBootVolume->OSVersion, sizeof(gMacOSVersion));␊
764}␊
765␊
766#define BASE 65521L /* largest prime smaller than 65536 */␊
767#define NMAX 5000␊
768// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
769␊
770#define DO1(buf, i)␉{s1 += buf[i]; s2 += s1;}␊
771#define DO2(buf, i)␉DO1(buf, i); DO1(buf, i + 1);␊
772#define DO4(buf, i)␉DO2(buf, i); DO2(buf, i + 2);␊
773#define DO8(buf, i)␉DO4(buf, i); DO4(buf, i + 4);␊
774#define DO16(buf)␉DO8(buf, 0); DO8(buf, 8);␊
775␊
776unsigned long Adler32(unsigned char *buf, long len)␊
777{␊
778␉unsigned long s1 = 1; // adler & 0xffff;␊
779␉unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
780␉unsigned long result;␊
781␉int k;␊
782␉␊
783␉while (len > 0) {␊
784␉␉k = len < NMAX ? len : NMAX;␊
785␉␉len -= k;␊
786␉␉while (k >= 16) {␊
787␉␉␉DO16(buf);␊
788␉␉␉buf += 16;␊
789␉␉␉k -= 16;␊
790␉␉}␊
791␉␉if (k != 0) do {␊
792␉␉␉s1 += *buf++;␊
793␉␉␉s2 += s1;␊
794␉␉} while (--k);␊
795␉␉s1 %= BASE;␊
796␉␉s2 %= BASE;␊
797␉}␊
798␉result = (s2 << 16) | s1;␊
799␉return OSSwapHostToBigInt32(result);␊
800}␊
801

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