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Source at commit 113 created 14 years 1 month ago.
By diebuche, working on ati res.
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 "graphics.h"␊
61#include "vbe.h"␊
62#include "ATIresolution.h"␊
63#include "edid.h"␊
64#include "platform.h"␊
65␊
66long gBootMode; /* defaults to 0 == kBootModeNormal */␊
67bool gOverrideKernel;␊
68static char gBootKernelCacheFile[512];␊
69static char gCacheNameAdler[64 + 256];␊
70char *gPlatformName = gCacheNameAdler;␊
71char gRootDevice[512];␊
72char gMKextName[512];␊
73char gMacOSVersion[8];␊
74bool gEnableCDROMRescan;␊
75bool gScanSingleDrive;␊
76␊
77int bvCount = 0;␊
78//int␉␉menucount = 0;␊
79int gDeviceCount = 0; ␊
80␊
81BVRef bvr;␊
82BVRef menuBVR;␊
83BVRef bvChain;␊
84bool useGUI;␊
85␊
86//static void selectBiosDevice(void);␊
87static unsigned long Adler32(unsigned char *buffer, long length);␊
88␊
89␊
90static bool gUnloadPXEOnExit = false;␊
91␊
92/*␊
93 * How long to wait (in seconds) to load the␊
94 * kernel after displaying the "boot:" prompt.␊
95 */␊
96#define kBootErrorTimeout 5␊
97␊
98/*␊
99 * Default path to kernel cache file␊
100 */␊
101#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"␊
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␊
142 ret = DecodeKernel(binary,␊
143 &kernelEntry,␊
144 (char **) &bootArgs->kaddr,␊
145 (int *)&bootArgs->ksize );␊
146␊
147 if ( ret != 0 )␊
148 return ret;␊
149␊
150 // Reserve space for boot args␊
151 reserveKernBootStruct();␊
152␊
153 // Load boot drivers from the specifed root path.␊
154␊
155 if (!gHaveKernelCache) {␊
156 LoadDrivers("/");␊
157 }␊
158␊
159 clearActivityIndicator();␊
160␊
161 if (gErrors) {␊
162 printf("Errors encountered while starting up the computer.\n");␊
163 printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
164 sleep(kBootErrorTimeout);␊
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 useGUI = true;␊
324 // Override useGUI default␊
325 getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊
326 ␊
327␉␊
328␉␊
329␉// Before initGui, path the video bios with the correct resolution␊
330 ␉␊
331 ␉UInt32 x = 0, y = 0; ␊
332 ␉UInt32 bp = 0;␊
333 ␉␊
334 ␉getResolution(&x, &y, &bp);␊
335 ␉␊
336 ␉␊
337 ␉if (x!=0 && y!=0) {␊
338 ␉␉vbios_map * map;␊
339␉␉␊
340 ␉␉map = open_vbios(CT_UNKWN);␊
341␉␉␊
342 ␉␉unlock_vbios(map);␊
343␉␉␊
344 ␉␉set_mode(map, x, y, bp, 0, 0);␊
345␉␉␊
346 ␉␉relock_vbios(map);␊
347␉␉␊
348 ␉␉close_vbios(map);␊
349␉␉␊
350 ␉␉verbose("Patched first resolution mode to %dx%d.\n", x, y);␊
351␉␉␊
352␉␉␊
353 ␉}␊
354␉␊
355 ␉␊
356 ␉//printf("Press any key to continue...");␊
357 ␉//getc();␊
358␉␊
359␉// Try initialising the GUI unless disabled␊
360␉␊
361␉␊
362␉if (useGUI) {␊
363 /* XXX AsereBLN handle error */␊
364␉initGUI();␊
365 }␊
366␊
367 setBootGlobals(bvChain);␊
368␊
369 // Parse args, load and start kernel.␊
370 while (1) {␊
371 const char *val;␊
372 int len;␊
373 int trycache;␊
374 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
375 int ret = -1;␊
376 void *binary = (void *)kLoadAddr;␊
377 bool tryresume;␊
378 bool tryresumedefault;␊
379 bool forceresume;␊
380␊
381 config_file_t systemVersion;␉␉// system.plist of booting partition␊
382␊
383 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
384 char bootFileSpec[512];␊
385␉␉␊
386 // Initialize globals.␊
387␊
388 sysConfigValid = false;␊
389 gErrors = false;␊
390␊
391 status = getBootOptions(firstRun);␊
392 firstRun = false;␊
393 if (status == -1) continue;␊
394␉␉ ␊
395 status = processBootOptions();␊
396 // Status==1 means to chainboot␊
397 if ( status == 1 ) break;␊
398 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
399 if ( status == -1 )␊
400 {␊
401 // gBootVolume == NULL usually means the user hit escape.␊
402 if(gBootVolume == NULL)␊
403 {␊
404 freeFilteredBVChain(bvChain);␊
405␊
406 if (gEnableCDROMRescan)␊
407 rescanBIOSDevice(gBIOSDev);␊
408 ␊
409 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
410 setBootGlobals(bvChain);␊
411 }␊
412 continue;␊
413 }␊
414␉␉␊
415 // Other status (e.g. 0) means that we should proceed with boot.␊
416␉␉␊
417␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
418␉␉␉drawBackground();␊
419␉␉␉␊
420 // Found and loaded a config file. Proceed with boot.␊
421␊
422␉␉// Turn off any GUI elements␊
423␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊
424␉␉{␊
425␉␉␉gui.devicelist.draw = false;␊
426␉␉␉gui.bootprompt.draw = false;␊
427␉␉␉gui.menu.draw = false;␊
428␉␉␉gui.infobox.draw = false;␊
429␉␉␉drawBackground();␊
430␉␉␉updateVRAM();␊
431␉␉}␊
432␉␉␊
433␉␉// Find out which version mac os we're booting.␊
434␉␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion)) {␊
435␉␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion)) {␉␊
436␉␉␉␉// getValueForKey uses const char for val␊
437␉␉␉␉// so copy it and trim␊
438␉␉␉␉strncpy(gMacOSVersion, val, MIN(len, 4));␊
439␉␉␉␉gMacOSVersion[MIN(len, 4)] = '\0';␊
440␉␉␉}␊
441␉␉}␊
442␊
443␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
444␉␉␉archCpuType = CPU_TYPE_X86_64;␊
445␉␉} else {␊
446␉␉␉archCpuType = CPU_TYPE_I386;␊
447␉␉}␊
448␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
449␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
450␉␉␉␉archCpuType = CPU_TYPE_I386;␊
451␉␉␉}␊
452␉␉}␊
453␉␉if (getValueForKey(k32BitModeFlag, &val, &len, &bootInfo->bootConfig)) {␊
454␉␉␉archCpuType = CPU_TYPE_I386;␊
455␉␉}␊
456␉␉␊
457␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
458␉␉␉tryresume = true;␊
459␉␉␉tryresumedefault = true;␊
460␉␉} else {␊
461␉␉␉tryresumedefault = false;␊
462␉␉}␊
463␊
464␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
465␉␉␉forceresume = false;␊
466␉␉}␊
467␉␉␊
468␉␉if (forceresume) {␊
469␉␉␉tryresume = true;␊
470␉␉␉tryresumedefault = false;␊
471␉␉}␊
472␉␉␊
473␉␉while (tryresume) {␊
474␉␉␉const char *tmp;␊
475␉␉␉BVRef bvr;␊
476␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
477␉␉␉␉val="/private/var/vm/sleepimage";␊
478␉␉␉␊
479␉␉␉// Do this first to be sure that root volume is mounted␊
480␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
481␊
482␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
483␉␉␉␉break;␊
484␉␉␉␊
485␉␉␉// Can't check if it was hibernation Wake=y is required␊
486␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
487␉␉␉␉break;␊
488␉␉␉␊
489␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
490␉␉␉␉break;␊
491␉␉␉␊
492␉␉␉if (!forceresume && ((sleeptime+3) < bvr->modTime)) {␉␊
493␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
494␉␉␉␉break;␊
495␉␉␉}␊
496␉␉␉␉␊
497␉␉␉HibernateBoot((char *)val);␊
498␉␉␉break;␊
499␉␉}␊
500␊
501 // Reset cache name.␊
502 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
503␊
504 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
505␊
506 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
507␊
508 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
509 strlcpy(gBootKernelCacheFile, val, len+1);␊
510 } else {␊
511 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);␊
512 }␊
513␊
514 // Check for cache file.␊
515 trycache = (((gBootMode & kBootModeSafe) == 0) &&␊
516 !gOverrideKernel &&␊
517 (gBootFileType == kBlockDeviceType) &&␊
518 (gMKextName[0] == '\0') &&␊
519 (gBootKernelCacheFile[0] != '\0'));␊
520␊
521␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
522␉␉␊
523 if (trycache) do {␊
524 ␊
525 // if we haven't found the kernel yet, don't use the cache␊
526 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
527 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
528 trycache = 0;␊
529 break;␊
530 }␊
531 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
532 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
533 || (cachetime < kerneltime)) {␊
534 trycache = 0;␊
535 break;␊
536 }␊
537 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
538 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
539 && (cachetime < exttime)) {␊
540 trycache = 0;␊
541 break;␊
542 }␊
543 if (kerneltime > exttime) {␊
544 exttime = kerneltime;␊
545 }␊
546 if (cachetime != (exttime + 1)) {␊
547 trycache = 0;␊
548 break;␊
549 }␊
550 } while (0);␊
551␊
552 do {␊
553 if (trycache) {␊
554 bootFile = gBootKernelCacheFile;␊
555 verbose("Loading kernel cache %s\n", bootFile);␊
556 ret = LoadFile(bootFile);␊
557 binary = (void *)kLoadAddr;␊
558 if (ret >= 0) {␊
559 break;␊
560 }␊
561 }␊
562 bootFile = bootInfo->bootFile;␊
563␊
564 // Try to load kernel image from alternate locations on boot helper partitions.␊
565 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
566 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
567 ␉ ␉ if (ret == -1)␊
568 ␉ ␉ {␊
569 sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
570 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
571 if (ret == -1)␊
572 {␊
573 sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
574 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
575 if (ret == -1)␊
576 {␊
577 // Not found any alternate locations, using the original kernel image path.␊
578 strcpy(bootFileSpec, bootFile);␊
579 }␊
580 }␊
581 }␊
582 ␉␉␉␊
583 verbose("Loading kernel %s\n", bootFileSpec);␊
584 ret = LoadThinFatFile(bootFileSpec, &binary);␊
585 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
586 {␊
587 archCpuType = CPU_TYPE_I386;␊
588 ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
589 }␊
590␉␉␉␊
591 } while (0);␊
592␊
593 clearActivityIndicator();␊
594#if DEBUG␊
595 printf("Pausing...");␊
596 sleep(8);␊
597#endif␊
598␊
599 if (ret <= 0) {␊
600␉␉␉printf("Can't find %s\n", bootFile);␊
601␊
602␉␉␉if(gui.initialised) {␊
603␉␉␉␉sleep(1);␊
604␉␉␉␉drawBackground();␊
605␉␉␉␉gui.devicelist.draw = true;␊
606␉␉␉␉gui.redraw = true;␊
607␉␉␉}␊
608 if (gBootFileType == kNetworkDeviceType) {␊
609 // Return control back to PXE. Don't unload PXE base code.␊
610 gUnloadPXEOnExit = false;␊
611 break;␊
612 }␊
613 } else {␊
614 /* Won't return if successful. */␊
615 ret = ExecKernel(binary);␊
616 }␊
617 }␊
618 ␊
619 // chainboot␊
620 if (status==1) {␊
621␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
622␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
623␉}␊
624 }␊
625␉␊
626 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
627␉nbpUnloadBaseCode();␊
628 }␊
629}␊
630␊
631/*!␊
632 Selects a new BIOS device, taking care to update the global state appropriately.␊
633 */␊
634/*␊
635static void selectBiosDevice(void)␊
636{␊
637 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
638 CacheReset();␊
639 diskFreeMap(oldMap);␊
640 oldMap = NULL;␊
641␊
642 int dev = selectAlternateBootDevice(gBIOSDev);␊
643␊
644 BVRef bvchain = scanBootVolumes(dev, 0);␊
645 BVRef bootVol = selectBootVolume(bvchain);␊
646 gBootVolume = bootVol;␊
647 setRootVolume(bootVol);␊
648 gBIOSDev = dev;␊
649}␊
650*/␊
651␊
652#define BASE 65521L /* largest prime smaller than 65536 */␊
653#define NMAX 5000␊
654// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
655␊
656#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
657#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
658#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
659#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
660#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
661␊
662unsigned long Adler32(unsigned char *buf, long len)␊
663{␊
664 unsigned long s1 = 1; // adler & 0xffff;␊
665 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
666 unsigned long result;␊
667 int k;␊
668␊
669 while (len > 0) {␊
670 k = len < NMAX ? len : NMAX;␊
671 len -= k;␊
672 while (k >= 16) {␊
673 DO16(buf);␊
674 buf += 16;␊
675 k -= 16;␊
676 }␊
677 if (k != 0) do {␊
678 s1 += *buf++;␊
679 s2 += s1;␊
680 } while (--k);␊
681 s1 %= BASE;␊
682 s2 %= BASE;␊
683 }␊
684 result = (s2 << 16) | s1;␊
685 return OSSwapHostToBigInt32(result);␊
686}␊
687

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