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Source at commit 132 created 14 years 30 days ago.
By diebuche, Adding lebidous latest changes
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 "edid.h"␊
62#include "autoresolution.h"␊
63␊
64long gBootMode; /* defaults to 0 == kBootModeNormal */␊
65bool gOverrideKernel;␊
66static char gBootKernelCacheFile[512];␊
67static char gCacheNameAdler[64 + 256];␊
68char *gPlatformName = gCacheNameAdler;␊
69char gRootDevice[512];␊
70char gMKextName[512];␊
71char gMacOSVersion[8];␊
72bool gEnableCDROMRescan;␊
73bool gScanSingleDrive;␊
74␊
75int bvCount = 0;␊
76//int␉␉menucount = 0;␊
77int gDeviceCount = 0; ␊
78␊
79BVRef bvr;␊
80BVRef menuBVR;␊
81BVRef bvChain;␊
82bool useGUI;␊
83bool autoResolution;␊
84␊
85//static void selectBiosDevice(void);␊
86static unsigned long Adler32(unsigned char *buffer, long length);␊
87␊
88␊
89static bool gUnloadPXEOnExit = false;␊
90␊
91/*␊
92 * How long to wait (in seconds) to load the␊
93 * kernel after displaying the "boot:" prompt.␊
94 */␊
95#define kBootErrorTimeout 5␊
96␊
97/*␊
98 * Default path to kernel cache file␊
99 */␊
100#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"␊
101␊
102//==========================================================================␊
103// Zero the BSS.␊
104␊
105static void zeroBSS(void)␊
106{␊
107␉extern char _DATA__bss__begin, _DATA__bss__end;␊
108␉extern char _DATA__common__begin, _DATA__common__end;␊
109␊
110␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
111␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
112}␊
113␊
114//==========================================================================␊
115// Malloc error function␊
116␊
117static void malloc_error(char *addr, size_t size, const char *file, int line)␊
118{␊
119␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
120}␊
121␊
122//==========================================================================␊
123//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
124//␊
125void initialize_runtime(void)␊
126{␊
127␉zeroBSS();␊
128␉malloc_init(0, 0, 0, malloc_error);␊
129}␊
130␊
131//==========================================================================␊
132// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
133␊
134static int ExecKernel(void *binary)␊
135{␊
136 entry_t kernelEntry;␊
137 int ret;␊
138␉␊
139 bootArgs->kaddr = bootArgs->ksize = 0;␊
140␊
141 ret = DecodeKernel(binary,␊
142 &kernelEntry,␊
143 (char **) &bootArgs->kaddr,␊
144 (int *)&bootArgs->ksize );␊
145␊
146 if ( ret != 0 )␊
147 return ret;␊
148␊
149 // Reserve space for boot args␊
150 reserveKernBootStruct();␊
151␊
152 // Load boot drivers from the specifed root path.␊
153␊
154 if (!gHaveKernelCache) {␊
155 LoadDrivers("/");␊
156 }␊
157␊
158 clearActivityIndicator();␊
159␊
160 if (gErrors) {␊
161 printf("Errors encountered while starting up the computer.\n");␊
162 printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
163 sleep(kBootErrorTimeout);␊
164 }␉␉␊
165␉␊
166␉␊
167 setupFakeEfi();␊
168␉␊
169␉verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
170␊
171 // Cleanup the PXE base code.␊
172␊
173 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
174␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
175 {␊
176 ␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
177 sleep(2);␊
178 }␊
179 }␊
180␊
181 bool dummyVal;␊
182 if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊
183␉printf("Press any key to continue...");␊
184␉getc();␊
185 }␊
186␊
187 // If we were in text mode, switch to graphics mode.␊
188 // This will draw the boot graphics unless we are in␊
189 // verbose mode.␊
190␊
191 if(gVerboseMode)␊
192 setVideoMode( GRAPHICS_MODE, 0 );␊
193 else␊
194 drawBootGraphics();␊
195␉␊
196 finalizeBootStruct();␊
197 ␊
198 // Jump to kernel's entry point. There's no going back now.␊
199␊
200 startprog( kernelEntry, bootArgs );␊
201␊
202 // Not reached␊
203␊
204 return 0;␊
205}␊
206␊
207//==========================================================================␊
208// This is the entrypoint from real-mode which functions exactly as it did␊
209// before. Multiboot does its own runtime initialization, does some of its␊
210// own things, and then calls common_boot.␊
211void boot(int biosdev)␊
212{␊
213␉initialize_runtime();␊
214␉// Enable A20 gate before accessing memory above 1Mb.␊
215␉enableA20();␊
216␉common_boot(biosdev);␊
217}␊
218␊
219//==========================================================================␊
220// The 'main' function for the booter. Called by boot0 when booting␊
221// from a block device, or by the network booter.␊
222//␊
223// arguments:␊
224// biosdev - Value passed from boot1/NBP to specify the device␊
225// that the booter was loaded from.␊
226//␊
227// If biosdev is kBIOSDevNetwork, then this function will return if␊
228// booting was unsuccessful. This allows the PXE firmware to try the␊
229// next boot device on its list.␊
230void common_boot(int biosdev)␊
231{␊
232 int status;␊
233 char *bootFile;␊
234 unsigned long adler32;␊
235 bool quiet;␊
236 bool firstRun = true;␊
237 bool instantMenu;␊
238 bool rescanPrompt;␊
239 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
240 unsigned int denyBVFlags = kBVFlagEFISystem;␊
241␊
242 // Set reminder to unload the PXE base code. Neglect to unload␊
243 // the base code will result in a hang or kernel panic.␊
244 gUnloadPXEOnExit = true;␊
245␊
246 // Record the device that the booter was loaded from.␊
247 gBIOSDev = biosdev & kBIOSDevMask;␊
248␊
249 // Initialize boot info structure.␊
250 initKernBootStruct();␊
251␊
252 // Setup VGA text mode.␊
253 // Not sure if it is safe to call setVideoMode() before the␊
254 // config table has been loaded. Call video_mode() instead.␊
255#if DEBUG␊
256 printf("before video_mode\n");␊
257#endif␊
258 video_mode( 2 ); // 80x25 mono text mode.␊
259#if DEBUG␊
260 printf("after video_mode\n");␊
261#endif␊
262␊
263 // Scan and record the system's hardware information.␊
264 scan_platform();␊
265␊
266 // First get info for boot volume.␊
267 scanBootVolumes(gBIOSDev, 0);␊
268 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
269 setBootGlobals(bvChain);␊
270 ␊
271 // Load boot.plist config file␊
272 status = loadSystemConfig(&bootInfo->bootConfig);␊
273␊
274 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
275 gBootMode |= kBootModeQuiet;␊
276 }␊
277␊
278 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
279 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
280 firstRun = false;␊
281 }␊
282␊
283 // Loading preboot ramdisk if exists.␊
284 loadPrebootRAMDisk();␊
285␊
286 // Disable rescan option by default␊
287 gEnableCDROMRescan = false;␊
288␊
289 // Enable it with Rescan=y in system config␊
290 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
291 gEnableCDROMRescan = true;␊
292 }␊
293␊
294 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
295 rescanPrompt = false;␊
296 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
297 gEnableCDROMRescan = promptForRescanOption();␊
298 }␊
299␊
300 // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
301 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
302 gScanSingleDrive = true;␊
303 }␊
304␊
305 // Create a list of partitions on device(s).␊
306 if (gScanSingleDrive) {␊
307 scanBootVolumes(gBIOSDev, &bvCount);␊
308 } else {␊
309 scanDisks(gBIOSDev, &bvCount);␊
310 }␊
311␊
312 // Create a separated bvr chain using the specified filters.␊
313 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
314␊
315 gBootVolume = selectBootVolume(bvChain);␊
316␊
317#if DEBUG␊
318 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
319 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
320 getc();␊
321#endif␊
322␊
323␉␊
324␉useGUI = TRUE;␊
325␉// Override useGUI default␊
326␉getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊
327 ␉␊
328 ␉// Before initGui, patch the video bios with the correct resolution␊
329 ␉␊
330 ␉UInt32 params[4];␊
331 ␉int count;␊
332 ␉params[3] = 0;␊
333 ␉␊
334␉␊
335 ␉autoResolution = TRUE;␊
336 ␉// Override AutoResolution default␊
337 ␉getBoolForKey(kAutoResolutionKey, &autoResolution, &bootInfo->bootConfig);␊
338 ␉␊
339␉vbios_map * map = open_vbios(CT_UNKWN);␊
340␉//Saving the bios in case we have to unpatch it␊
341␉save_vbios(map);␊
342␉␊
343 ␉if (autoResolution == TRUE) {␊
344␉␉//Get Resolution from Graphics Mode key␊
345 ␉␉count = getNumberArrayFromProperty(kGraphicsModeKey, params, 4);␊
346 ␉␉if ( count < 3 ){␊
347␉␉␉//If no Graphics Mode key, get from EDID␊
348 ␉␉␉getResolution(&params[0], &params[1], &params[2]);␊
349␉␉␉verbose("EDID Resolution: %dx%d\n",params[0], params[1]);␊
350 ␉␉}␊
351␉} else {␊
352 ␉␉␉if ( params[2] == 256 ) params[2] = 8;␊
353 ␉␉␉if ( params[2] == 555 ) params[2] = 16;␊
354 ␉␉␉if ( params[2] == 888 ) params[2] = 32;␊
355␉}␊
356 ␉␉␊
357␉if (params[0]!=0 && params[1]!=0) {␉␊
358 ␉␉␉␊
359 ␉␉␉unlock_vbios(map);␊
360 ␉␉␉␊
361␉␉␉patch_vbios(map, params[0], params[1], params[2], 0, 0);␊
362 ␉␉␉␊
363 ␉␉␉relock_vbios(map);␊
364␉␉␉#if DEBUG␉␉␉␊
365␉␉␉␉printf("Press Any Key...\n");␊
366␉␉␉ ␉getc();␊
367␉␉␉#endif␊
368␉}␊
369 ␉␊
370␉␉␊
371 if (useGUI) {␊
372 /* XXX AsereBLN handle error */␊
373␉initGUI();␊
374 }␊
375␊
376 setBootGlobals(bvChain);␊
377␊
378 // Parse args, load and start kernel.␊
379 while (1) {␊
380 const char *val;␊
381 int len;␊
382 int trycache;␊
383 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
384 int ret = -1;␊
385 void *binary = (void *)kLoadAddr;␊
386 bool tryresume;␊
387 bool tryresumedefault;␊
388 bool forceresume;␊
389␊
390 config_file_t systemVersion;␉␉// system.plist of booting partition␊
391␊
392 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
393 char bootFileSpec[512];␊
394␉␉␊
395 // Initialize globals.␊
396␊
397 sysConfigValid = false;␊
398 gErrors = false;␊
399␊
400 status = getBootOptions(firstRun);␊
401 firstRun = false;␊
402 if (status == -1) continue;␊
403␉␉ ␊
404 status = processBootOptions();␊
405 // Status==1 means to chainboot␊
406 if ( status == 1 ) break;␊
407 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
408 if ( status == -1 )␊
409 {␊
410 // gBootVolume == NULL usually means the user hit escape.␊
411 if(gBootVolume == NULL)␊
412 {␊
413 freeFilteredBVChain(bvChain);␊
414␊
415 if (gEnableCDROMRescan)␊
416 rescanBIOSDevice(gBIOSDev);␊
417 ␊
418 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
419 setBootGlobals(bvChain);␊
420 }␊
421 continue;␊
422 }␊
423␉␉␊
424 // Other status (e.g. 0) means that we should proceed with boot.␊
425␉␉␊
426␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
427␉␉␉drawBackground();␊
428␉␉␉␊
429 // Found and loaded a config file. Proceed with boot.␊
430␊
431␉␉// Turn off any GUI elements␊
432␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
433␉␉{␊
434␉␉␉gui.devicelist.draw = false;␊
435␉␉␉gui.bootprompt.draw = false;␊
436␉␉␉gui.menu.draw = false;␊
437␉␉␉gui.infobox.draw = false;␊
438␉␉␉drawBackground();␊
439␉␉␉updateVRAM();␊
440␉␉}␊
441␉␉␊
442␉␉/*␊
443␉␉ * AutoResolution - Reapply the patch or cancel if Graphics Mode was incorrect␊
444␉␉ * or EDID Info was insane␊
445␉␉ */␉␊
446␉ getBoolForKey(kAutoResolutionKey, &autoResolution, &bootInfo->bootConfig);␊
447␉␉␊
448␉␉//Restore the vbios for Cancelation␊
449␉␉if ((autoResolution == FALSE) && map) {␊
450␉␉␉␊
451␉␉␉unlock_vbios(map);␊
452␉␉␉␊
453␉␉␉restore_vbios(map);␊
454␉␉␉␊
455␉␉␉relock_vbios(map);␊
456␉␉␉␊
457␉␉␉close_vbios(map);␊
458␉␉␉␊
459␉␉} ␊
460␉␉if ((autoResolution == TRUE) && map) {␊
461␉␉␉//Reapply patch in case resolution have changed␊
462␉␉␉␊
463␉␉␉count = getNumberArrayFromProperty(kGraphicsModeKey, params, 4);␊
464␉␉␉if ( count < 3 ) {␊
465␉␉␉␉getResolution(&params[0], &params[1], &params[2]);␊
466␉␉␉}␊
467␉␉␉else ␊
468␉␉␉{␊
469␉␉␉␉if ( params[2] == 256 ) params[2] = 8;␊
470␉␉␉␉if ( params[2] == 555 ) params[2] = 16;␊
471␉␉␉␉if ( params[2] == 888 ) params[2] = 32;␊
472␉␉␉}␊
473␉␉␉␊
474␉␉␉if (params[0]!=0 && params[1]!=0) {␊
475␉␉␉␉␊
476␉␉␉␉unlock_vbios(map);␊
477␉␉␉␉␊
478␉␉␉␉patch_vbios(map, params[0], params[1], params[2], 0, 0);␊
479␉␉␉␉␊
480␉␉␉␉relock_vbios(map);␊
481␉␉␉␉␊
482␉␉␉␉close_vbios(map);␊
483␉␉␉}␊
484␉␉}␊
485␉␉␊
486␉␉// Find out which version mac os we're booting.␊
487␉␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion)) {␊
488␉␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion)) {␉␊
489␉␉␉␉// getValueForKey uses const char for val␊
490␉␉␉␉// so copy it and trim␊
491␉␉␉␉strncpy(gMacOSVersion, val, MIN(len, 4));␊
492␉␉␉␉gMacOSVersion[MIN(len, 4)] = '\0';␊
493␉␉␉}␊
494␉␉}␊
495␊
496␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
497␉␉␉archCpuType = CPU_TYPE_X86_64;␊
498␉␉} else {␊
499␉␉␉archCpuType = CPU_TYPE_I386;␊
500␉␉}␊
501␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
502␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
503␉␉␉␉archCpuType = CPU_TYPE_I386;␊
504␉␉␉}␊
505␉␉}␊
506␉␉if (getValueForKey(k32BitModeFlag, &val, &len, &bootInfo->bootConfig)) {␊
507␉␉␉archCpuType = CPU_TYPE_I386;␊
508␉␉}␊
509␉␉␊
510␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
511␉␉␉tryresume = true;␊
512␉␉␉tryresumedefault = true;␊
513␉␉} else {␊
514␉␉␉tryresumedefault = false;␊
515␉␉}␊
516␊
517␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
518␉␉␉forceresume = false;␊
519␉␉}␊
520␉␉␊
521␉␉if (forceresume) {␊
522␉␉␉tryresume = true;␊
523␉␉␉tryresumedefault = false;␊
524␉␉}␊
525␉␉␊
526␉␉while (tryresume) {␊
527␉␉␉const char *tmp;␊
528␉␉␉BVRef bvr;␊
529␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
530␉␉␉␉val="/private/var/vm/sleepimage";␊
531␉␉␉␊
532␉␉␉// Do this first to be sure that root volume is mounted␊
533␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
534␊
535␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
536␉␉␉␉break;␊
537␉␉␉␊
538␉␉␉// Can't check if it was hibernation Wake=y is required␊
539␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
540␉␉␉␉break;␊
541␉␉␉␊
542␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
543␉␉␉␉break;␊
544␉␉␉␊
545␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
546␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
547␉␉␉␉break;␊
548␉␉␉}␊
549␉␉␉␉␊
550␉␉␉HibernateBoot((char *)val);␊
551␉␉␉break;␊
552␉␉}␊
553␊
554 // Reset cache name.␊
555 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
556␊
557 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
558␊
559 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
560␊
561 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
562 strlcpy(gBootKernelCacheFile, val, len+1);␊
563 } else {␊
564 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);␊
565 }␊
566␊
567 // Check for cache file.␊
568 trycache = (((gBootMode & kBootModeSafe) == 0) &&␊
569 !gOverrideKernel &&␊
570 (gBootFileType == kBlockDeviceType) &&␊
571 (gMKextName[0] == '\0') &&␊
572 (gBootKernelCacheFile[0] != '\0'));␊
573␊
574␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
575␉␉␊
576 if (trycache) do {␊
577 ␊
578 // if we haven't found the kernel yet, don't use the cache␊
579 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
580 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
581 trycache = 0;␊
582 break;␊
583 }␊
584 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
585 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
586 || (cachetime < kerneltime)) {␊
587 trycache = 0;␊
588 break;␊
589 }␊
590 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
591 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
592 && (cachetime < exttime)) {␊
593 trycache = 0;␊
594 break;␊
595 }␊
596 if (kerneltime > exttime) {␊
597 exttime = kerneltime;␊
598 }␊
599 if (cachetime != (exttime + 1)) {␊
600 trycache = 0;␊
601 break;␊
602 }␊
603 } while (0);␊
604␊
605 do {␊
606 if (trycache) {␊
607 bootFile = gBootKernelCacheFile;␊
608 verbose("Loading kernel cache %s\n", bootFile);␊
609 ret = LoadFile(bootFile);␊
610 binary = (void *)kLoadAddr;␊
611 if (ret >= 0) {␊
612 break;␊
613 }␊
614 }␊
615 bootFile = bootInfo->bootFile;␊
616␊
617 // Try to load kernel image from alternate locations on boot helper partitions.␊
618 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
619 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
620 ␉ ␉ if (ret == -1)␊
621 ␉ ␉ {␊
622 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
623 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
624 if (ret == -1)␊
625 {␊
626 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
627 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
628 if (ret == -1)␊
629 {␊
630 // Not found any alternate locations, using the original kernel image path.␊
631 strcpy(bootFileSpec, bootFile);␊
632 }␊
633 }␊
634 }␊
635 ␉␉␉␊
636 verbose("Loading kernel %s\n", bootFileSpec);␊
637 ret = LoadThinFatFile(bootFileSpec, &binary);␊
638 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
639 {␊
640 archCpuType = CPU_TYPE_I386;␊
641 ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
642 }␊
643␉␉␉␊
644 } while (0);␊
645␊
646 clearActivityIndicator();␊
647#if DEBUG␊
648 printf("Pausing...");␊
649 sleep(8);␊
650#endif␊
651␊
652 if (ret <= 0) {␊
653␉␉␉printf("Can't find %s\n", bootFile);␊
654␊
655␉␉␉if(gui.initialised) {␊
656␉␉␉␉sleep(1);␊
657␉␉␉␉drawBackground();␊
658␉␉␉␉gui.devicelist.draw = true;␊
659␉␉␉␉gui.redraw = true;␊
660␉␉␉}␊
661 if (gBootFileType == kNetworkDeviceType) {␊
662 // Return control back to PXE. Don't unload PXE base code.␊
663 gUnloadPXEOnExit = false;␊
664 break;␊
665 }␊
666 } else {␊
667 /* Won't return if successful. */␊
668 ret = ExecKernel(binary);␊
669 }␊
670 }␊
671 ␊
672 // chainboot␊
673 if (status==1) {␊
674␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
675␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
676␉}␊
677 }␊
678␉␊
679 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
680␉nbpUnloadBaseCode();␊
681 }␊
682}␊
683␊
684/*!␊
685 Selects a new BIOS device, taking care to update the global state appropriately.␊
686 */␊
687/*␊
688static void selectBiosDevice(void)␊
689{␊
690 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
691 CacheReset();␊
692 diskFreeMap(oldMap);␊
693 oldMap = NULL;␊
694␊
695 int dev = selectAlternateBootDevice(gBIOSDev);␊
696␊
697 BVRef bvchain = scanBootVolumes(dev, 0);␊
698 BVRef bootVol = selectBootVolume(bvchain);␊
699 gBootVolume = bootVol;␊
700 setRootVolume(bootVol);␊
701 gBIOSDev = dev;␊
702}␊
703*/␊
704␊
705#define BASE 65521L /* largest prime smaller than 65536 */␊
706#define NMAX 5000␊
707// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
708␊
709#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
710#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
711#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
712#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
713#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
714␊
715unsigned long Adler32(unsigned char *buf, long len)␊
716{␊
717 unsigned long s1 = 1; // adler & 0xffff;␊
718 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
719 unsigned long result;␊
720 int k;␊
721␊
722 while (len > 0) {␊
723 k = len < NMAX ? len : NMAX;␊
724 len -= k;␊
725 while (k >= 16) {␊
726 DO16(buf);␊
727 buf += 16;␊
728 k -= 16;␊
729 }␊
730 if (k != 0) do {␊
731 s1 += *buf++;␊
732 s2 += s1;␊
733 } while (--k);␊
734 s1 %= BASE;␊
735 s2 %= BASE;␊
736 }␊
737 result = (s2 << 16) | s1;␊
738 return OSSwapHostToBigInt32(result);␊
739}␊
740

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