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Source at commit 304 created 13 years 11 months ago. By zef, Fixed cache size configuration in msdos.c. | |
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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 "gui.h"␊ |
60 | #include "platform.h"␊ |
61 | #include "resolution.h"␊ |
62 | ␊ |
63 | long gBootMode; /* defaults to 0 == kBootModeNormal */␊ |
64 | bool gOverrideKernel;␊ |
65 | static char gBootKernelCacheFile[512];␊ |
66 | static char gCacheNameAdler[64 + 256];␊ |
67 | char *gPlatformName = gCacheNameAdler;␊ |
68 | char gRootDevice[512];␊ |
69 | char gMKextName[512];␊ |
70 | char gMacOSVersion[8];␊ |
71 | bool gEnableCDROMRescan;␊ |
72 | bool gScanSingleDrive;␊ |
73 | ␊ |
74 | int bvCount = 0;␊ |
75 | //int␉menucount = 0;␊ |
76 | int gDeviceCount = 0; ␊ |
77 | ␊ |
78 | bool␉recoveryMode = false;␊ |
79 | ␊ |
80 | BVRef bvr;␊ |
81 | BVRef menuBVR;␊ |
82 | BVRef bvChain;␊ |
83 | bool useGUI;␊ |
84 | ␊ |
85 | //static void selectBiosDevice(void);␊ |
86 | static unsigned long Adler32(unsigned char *buffer, long length);␊ |
87 | ␊ |
88 | ␊ |
89 | static 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 | ␊ |
105 | static 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 | ␊ |
117 | static 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 | //␊ |
125 | void 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 | ␊ |
134 | static 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 | ␉md0Ramdisk();␊ |
167 | ␉␊ |
168 | setupFakeEfi();␊ |
169 | ␊ |
170 | verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊ |
171 | ␊ |
172 | // Cleanup the PXE base code.␊ |
173 | ␊ |
174 | if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊ |
175 | ␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊ |
176 | {␊ |
177 | ␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊ |
178 | sleep(2);␊ |
179 | }␊ |
180 | }␊ |
181 | ␊ |
182 | bool dummyVal;␊ |
183 | if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal) {␊ |
184 | ␉printf("Press any key to continue...");␊ |
185 | ␉getc();␊ |
186 | }␊ |
187 | ␊ |
188 | // If we were in text mode, switch to graphics mode.␊ |
189 | // This will draw the boot graphics unless we are in␊ |
190 | // verbose mode.␊ |
191 | ␊ |
192 | if(gVerboseMode)␊ |
193 | setVideoMode( GRAPHICS_MODE, 0 );␊ |
194 | else␊ |
195 | drawBootGraphics();␊ |
196 | ␉␊ |
197 | finalizeBootStruct();␊ |
198 | ␊ |
199 | ␉usb_loop();␊ |
200 | // Jump to kernel's entry point. There's no going back now.␊ |
201 | startprog( kernelEntry, bootArgs );␊ |
202 | ␊ |
203 | // Not reached␊ |
204 | ␊ |
205 | return 0;␊ |
206 | }␊ |
207 | ␊ |
208 | //==========================================================================␊ |
209 | // This is the entrypoint from real-mode which functions exactly as it did␊ |
210 | // before. Multiboot does its own runtime initialization, does some of its␊ |
211 | // own things, and then calls common_boot.␊ |
212 | void boot(int biosdev)␊ |
213 | {␊ |
214 | ␉initialize_runtime();␊ |
215 | ␉// Enable A20 gate before accessing memory above 1Mb.␊ |
216 | ␉enableA20();␊ |
217 | ␉common_boot(biosdev);␊ |
218 | }␊ |
219 | ␊ |
220 | //==========================================================================␊ |
221 | // The 'main' function for the booter. Called by boot0 when booting␊ |
222 | // from a block device, or by the network booter.␊ |
223 | //␊ |
224 | // arguments:␊ |
225 | // biosdev - Value passed from boot1/NBP to specify the device␊ |
226 | // that the booter was loaded from.␊ |
227 | //␊ |
228 | // If biosdev is kBIOSDevNetwork, then this function will return if␊ |
229 | // booting was unsuccessful. This allows the PXE firmware to try the␊ |
230 | // next boot device on its list.␊ |
231 | void common_boot(int biosdev)␊ |
232 | {␊ |
233 | int status;␊ |
234 | char *bootFile;␊ |
235 | unsigned long adler32;␊ |
236 | bool quiet;␊ |
237 | bool firstRun = true;␊ |
238 | bool instantMenu;␊ |
239 | bool rescanPrompt;␊ |
240 | unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊ |
241 | unsigned int denyBVFlags = kBVFlagEFISystem;␊ |
242 | ␊ |
243 | // Set reminder to unload the PXE base code. Neglect to unload␊ |
244 | // the base code will result in a hang or kernel panic.␊ |
245 | gUnloadPXEOnExit = true;␊ |
246 | ␊ |
247 | // Record the device that the booter was loaded from.␊ |
248 | gBIOSDev = biosdev & kBIOSDevMask;␊ |
249 | ␊ |
250 | // Initialize boot info structure.␊ |
251 | initKernBootStruct();␊ |
252 | ␊ |
253 | // Setup VGA text mode.␊ |
254 | // Not sure if it is safe to call setVideoMode() before the␊ |
255 | // config table has been loaded. Call video_mode() instead.␊ |
256 | #if DEBUG␊ |
257 | printf("before video_mode\n");␊ |
258 | #endif␊ |
259 | video_mode( 2 ); // 80x25 mono text mode.␊ |
260 | #if DEBUG␊ |
261 | printf("after video_mode\n");␊ |
262 | #endif␊ |
263 | ␊ |
264 | // Scan and record the system's hardware information.␊ |
265 | scan_platform();␊ |
266 | ␊ |
267 | // First get info for boot volume.␊ |
268 | scanBootVolumes(gBIOSDev, 0);␊ |
269 | bvChain = getBVChainForBIOSDev(gBIOSDev);␊ |
270 | setBootGlobals(bvChain);␊ |
271 | ␊ |
272 | // Load boot.plist config file␊ |
273 | status = loadSystemConfig(&bootInfo->bootConfig);␊ |
274 | ␊ |
275 | if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊ |
276 | gBootMode |= kBootModeQuiet;␊ |
277 | }␊ |
278 | ␊ |
279 | // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊ |
280 | if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊ |
281 | firstRun = false;␊ |
282 | }␊ |
283 | ␊ |
284 | // Loading preboot ramdisk if exists.␊ |
285 | loadPrebootRAMDisk();␊ |
286 | ␊ |
287 | // Disable rescan option by default␊ |
288 | gEnableCDROMRescan = false;␊ |
289 | ␊ |
290 | // Enable it with Rescan=y in system config␊ |
291 | if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊ |
292 | gEnableCDROMRescan = true;␊ |
293 | }␊ |
294 | ␊ |
295 | // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊ |
296 | rescanPrompt = false;␊ |
297 | if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊ |
298 | gEnableCDROMRescan = promptForRescanOption();␊ |
299 | }␊ |
300 | ␊ |
301 | // Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊ |
302 | if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊ |
303 | gScanSingleDrive = true;␊ |
304 | }␊ |
305 | ␊ |
306 | // Create a list of partitions on device(s).␊ |
307 | if (gScanSingleDrive) {␊ |
308 | scanBootVolumes(gBIOSDev, &bvCount);␊ |
309 | } else {␊ |
310 | scanDisks(gBIOSDev, &bvCount);␊ |
311 | }␊ |
312 | ␊ |
313 | // Create a separated bvr chain using the specified filters.␊ |
314 | bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊ |
315 | ␊ |
316 | gBootVolume = selectBootVolume(bvChain);␊ |
317 | ␊ |
318 | #if DEBUG␊ |
319 | printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊ |
320 | printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊ |
321 | getc();␊ |
322 | #endif␊ |
323 | ␊ |
324 | useGUI = true;␊ |
325 | // Override useGUI default␊ |
326 | getBoolForKey(kGUIKey, &useGUI, &bootInfo->bootConfig);␊ |
327 | if (useGUI) {␊ |
328 | ␉␉patchVideoBios();␊ |
329 | /* XXX AsereBLN handle error */␊ |
330 | ␉␉initGUI();␊ |
331 | }␊ |
332 | ␊ |
333 | setBootGlobals(bvChain);␊ |
334 | ␊ |
335 | // Parse args, load and start kernel.␊ |
336 | while (1) {␊ |
337 | const char *val;␊ |
338 | int len;␊ |
339 | int trycache;␊ |
340 | long flags, cachetime, kerneltime, exttime, sleeptime, time;␊ |
341 | int ret = -1;␊ |
342 | void *binary = (void *)kLoadAddr;␊ |
343 | bool tryresume;␊ |
344 | bool tryresumedefault;␊ |
345 | bool forceresume;␊ |
346 | ␊ |
347 | config_file_t systemVersion;␉␉// system.plist of booting partition␊ |
348 | ␊ |
349 | // additional variable for testing alternate kernel image locations on boot helper partitions.␊ |
350 | char bootFileSpec[512];␊ |
351 | ␉␉␊ |
352 | // Initialize globals.␊ |
353 | ␊ |
354 | sysConfigValid = false;␊ |
355 | gErrors = false;␊ |
356 | ␊ |
357 | status = getBootOptions(firstRun);␊ |
358 | firstRun = false;␊ |
359 | if (status == -1) continue;␊ |
360 | ␉␉ ␊ |
361 | status = processBootOptions();␊ |
362 | // Status==1 means to chainboot␊ |
363 | if ( status == 1 ) break;␊ |
364 | // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊ |
365 | if ( status == -1 )␊ |
366 | {␊ |
367 | // gBootVolume == NULL usually means the user hit escape.␊ |
368 | if(gBootVolume == NULL)␊ |
369 | {␊ |
370 | freeFilteredBVChain(bvChain);␊ |
371 | ␊ |
372 | if (gEnableCDROMRescan)␊ |
373 | rescanBIOSDevice(gBIOSDev);␊ |
374 | ␊ |
375 | bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊ |
376 | setBootGlobals(bvChain);␊ |
377 | }␊ |
378 | continue;␊ |
379 | }␊ |
380 | ␉␉␊ |
381 | // Other status (e.g. 0) means that we should proceed with boot.␊ |
382 | ␉␉␊ |
383 | ␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊ |
384 | ␉␉␉drawBackground();␊ |
385 | ␉␉␉␊ |
386 | // Found and loaded a config file. Proceed with boot.␊ |
387 | ␊ |
388 | ␉␉// Turn off any GUI elements␊ |
389 | ␉␉if( bootArgs->Video.v_display == GRAPHICS_MODE )␊ |
390 | ␉␉{␊ |
391 | ␉␉␉gui.devicelist.draw = false;␊ |
392 | ␉␉␉gui.bootprompt.draw = false;␊ |
393 | ␉␉␉gui.menu.draw = false;␊ |
394 | ␉␉␉gui.infobox.draw = false;␊ |
395 | ␉␉␉drawBackground();␊ |
396 | ␉␉␉updateVRAM();␊ |
397 | ␉␉}␊ |
398 | ␉␉␊ |
399 | ␉␉// Find out which version mac os we're booting.␊ |
400 | ␉␉if (!loadConfigFile("System/Library/CoreServices/SystemVersion.plist", &systemVersion)) {␊ |
401 | ␉␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion)) {␉␊ |
402 | ␉␉␉␉// getValueForKey uses const char for val␊ |
403 | ␉␉␉␉// so copy it and trim␊ |
404 | ␉␉␉␉strncpy(gMacOSVersion, val, MIN(len, 4));␊ |
405 | ␉␉␉␉gMacOSVersion[MIN(len, 4)] = '\0';␊ |
406 | ␉␉␉}␊ |
407 | ␉␉}␊ |
408 | ␊ |
409 | ␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊ |
410 | ␉␉␉archCpuType = CPU_TYPE_X86_64;␊ |
411 | ␉␉} else {␊ |
412 | ␉␉␉archCpuType = CPU_TYPE_I386;␊ |
413 | ␉␉}␊ |
414 | ␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊ |
415 | ␉␉␉if (strncmp(val, "i386", 4) == 0) {␊ |
416 | ␉␉␉␉archCpuType = CPU_TYPE_I386;␊ |
417 | ␉␉␉}␊ |
418 | ␉␉}␊ |
419 | ␉␉if (getValueForKey(k32BitModeFlag, &val, &len, &bootInfo->bootConfig)) {␊ |
420 | ␉␉␉archCpuType = CPU_TYPE_I386;␊ |
421 | ␉␉}␊ |
422 | ␉␉␊ |
423 | ␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊ |
424 | ␉␉␉tryresume = true;␊ |
425 | ␉␉␉tryresumedefault = true;␊ |
426 | ␉␉} else {␊ |
427 | ␉␉␉tryresumedefault = false;␊ |
428 | ␉␉}␊ |
429 | ␊ |
430 | ␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊ |
431 | ␉␉␉forceresume = false;␊ |
432 | ␉␉}␊ |
433 | ␉␉␊ |
434 | ␉␉if (forceresume) {␊ |
435 | ␉␉␉tryresume = true;␊ |
436 | ␉␉␉tryresumedefault = false;␊ |
437 | ␉␉}␊ |
438 | ␉␉␊ |
439 | ␉␉while (tryresume) {␊ |
440 | ␉␉␉const char *tmp;␊ |
441 | ␉␉␉BVRef bvr;␊ |
442 | ␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊ |
443 | ␉␉␉␉val="/private/var/vm/sleepimage";␊ |
444 | ␉␉␉␊ |
445 | ␉␉␉// Do this first to be sure that root volume is mounted␊ |
446 | ␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊ |
447 | ␊ |
448 | ␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊ |
449 | ␉␉␉␉break;␊ |
450 | ␉␉␉␊ |
451 | ␉␉␉// Can't check if it was hibernation Wake=y is required␊ |
452 | ␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊ |
453 | ␉␉␉␉break;␊ |
454 | ␉␉␉␊ |
455 | ␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊ |
456 | ␉␉␉␉break;␊ |
457 | ␉␉␉␊ |
458 | ␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊ |
459 | ␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊ |
460 | ␉␉␉␉break;␊ |
461 | ␉␉␉}␊ |
462 | ␉␉␉␉␊ |
463 | ␉␉␉HibernateBoot((char *)val);␊ |
464 | ␉␉␉break;␊ |
465 | ␉␉}␊ |
466 | ␊ |
467 | // Reset cache name.␊ |
468 | bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊ |
469 | ␊ |
470 | sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊ |
471 | ␊ |
472 | adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊ |
473 | ␊ |
474 | if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊ |
475 | strlcpy(gBootKernelCacheFile, val, len+1);␊ |
476 | } else {␊ |
477 | sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);␊ |
478 | }␊ |
479 | ␊ |
480 | // Check for cache file.␊ |
481 | trycache = (((gBootMode & kBootModeSafe) == 0) &&␊ |
482 | !gOverrideKernel &&␊ |
483 | (gBootFileType == kBlockDeviceType) &&␊ |
484 | (gMKextName[0] == '\0') &&␊ |
485 | (gBootKernelCacheFile[0] != '\0'));␊ |
486 | ␊ |
487 | ␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊ |
488 | ␉␉␊ |
489 | if (trycache) do {␊ |
490 | ␊ |
491 | // if we haven't found the kernel yet, don't use the cache␊ |
492 | ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊ |
493 | if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊ |
494 | trycache = 0;␊ |
495 | break;␊ |
496 | }␊ |
497 | ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊ |
498 | if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊ |
499 | || (cachetime < kerneltime)) {␊ |
500 | trycache = 0;␊ |
501 | break;␊ |
502 | }␊ |
503 | ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊ |
504 | if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊ |
505 | && (cachetime < exttime)) {␊ |
506 | trycache = 0;␊ |
507 | break;␊ |
508 | }␊ |
509 | if (kerneltime > exttime) {␊ |
510 | exttime = kerneltime;␊ |
511 | }␊ |
512 | if (cachetime != (exttime + 1)) {␊ |
513 | trycache = 0;␊ |
514 | break;␊ |
515 | }␊ |
516 | } while (0);␊ |
517 | ␊ |
518 | do {␊ |
519 | if (trycache) {␊ |
520 | bootFile = gBootKernelCacheFile;␊ |
521 | verbose("Loading kernel cache %s\n", bootFile);␊ |
522 | ret = LoadFile(bootFile);␊ |
523 | binary = (void *)kLoadAddr;␊ |
524 | if (ret >= 0) {␊ |
525 | break;␊ |
526 | }␊ |
527 | }␊ |
528 | bootFile = bootInfo->bootFile;␊ |
529 | ␊ |
530 | // Try to load kernel image from alternate locations on boot helper partitions.␊ |
531 | sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊ |
532 | ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊ |
533 | ␉ ␉ if (ret == -1)␊ |
534 | ␉ ␉ {␊ |
535 | sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊ |
536 | ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊ |
537 | if (ret == -1)␊ |
538 | {␊ |
539 | sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊ |
540 | ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊ |
541 | if (ret == -1)␊ |
542 | {␊ |
543 | // Not found any alternate locations, using the original kernel image path.␊ |
544 | strcpy(bootFileSpec, bootFile);␊ |
545 | }␊ |
546 | }␊ |
547 | }␊ |
548 | ␉␉␉␊ |
549 | verbose("Loading kernel %s\n", bootFileSpec);␊ |
550 | ret = LoadThinFatFile(bootFileSpec, &binary);␊ |
551 | if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊ |
552 | {␊ |
553 | archCpuType = CPU_TYPE_I386;␊ |
554 | ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊ |
555 | }␊ |
556 | ␉␉␉␊ |
557 | } while (0);␊ |
558 | ␊ |
559 | clearActivityIndicator();␊ |
560 | #if DEBUG␊ |
561 | printf("Pausing...");␊ |
562 | sleep(8);␊ |
563 | #endif␊ |
564 | ␊ |
565 | if (ret <= 0) {␊ |
566 | ␉␉␉printf("Can't find %s\n", bootFile);␊ |
567 | ␊ |
568 | ␉␉␉if(gui.initialised) {␊ |
569 | ␉␉␉␉sleep(1);␊ |
570 | ␉␉␉␉drawBackground();␊ |
571 | ␉␉␉␉gui.devicelist.draw = true;␊ |
572 | ␉␉␉␉gui.redraw = true;␊ |
573 | ␉␉␉}␊ |
574 | if (gBootFileType == kNetworkDeviceType) {␊ |
575 | // Return control back to PXE. Don't unload PXE base code.␊ |
576 | gUnloadPXEOnExit = false;␊ |
577 | break;␊ |
578 | }␊ |
579 | } else {␊ |
580 | /* Won't return if successful. */␊ |
581 | ret = ExecKernel(binary);␊ |
582 | }␊ |
583 | }␊ |
584 | ␊ |
585 | // chainboot␊ |
586 | if (status==1) {␊ |
587 | ␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊ |
588 | ␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊ |
589 | ␉}␊ |
590 | }␊ |
591 | ␉␊ |
592 | if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊ |
593 | ␉nbpUnloadBaseCode();␊ |
594 | }␊ |
595 | }␊ |
596 | ␊ |
597 | /*!␊ |
598 | Selects a new BIOS device, taking care to update the global state appropriately.␊ |
599 | */␊ |
600 | /*␊ |
601 | static void selectBiosDevice(void)␊ |
602 | {␊ |
603 | struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊ |
604 | CacheReset();␊ |
605 | diskFreeMap(oldMap);␊ |
606 | oldMap = NULL;␊ |
607 | ␊ |
608 | int dev = selectAlternateBootDevice(gBIOSDev);␊ |
609 | ␊ |
610 | BVRef bvchain = scanBootVolumes(dev, 0);␊ |
611 | BVRef bootVol = selectBootVolume(bvchain);␊ |
612 | gBootVolume = bootVol;␊ |
613 | setRootVolume(bootVol);␊ |
614 | gBIOSDev = dev;␊ |
615 | }␊ |
616 | */␊ |
617 | ␊ |
618 | #define BASE 65521L /* largest prime smaller than 65536 */␊ |
619 | #define NMAX 5000␊ |
620 | // NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊ |
621 | ␊ |
622 | #define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊ |
623 | #define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊ |
624 | #define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊ |
625 | #define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊ |
626 | #define DO16(buf) DO8(buf,0); DO8(buf,8);␊ |
627 | ␊ |
628 | unsigned long Adler32(unsigned char *buf, long len)␊ |
629 | {␊ |
630 | unsigned long s1 = 1; // adler & 0xffff;␊ |
631 | unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊ |
632 | unsigned long result;␊ |
633 | int k;␊ |
634 | ␊ |
635 | while (len > 0) {␊ |
636 | k = len < NMAX ? len : NMAX;␊ |
637 | len -= k;␊ |
638 | while (k >= 16) {␊ |
639 | DO16(buf);␊ |
640 | buf += 16;␊ |
641 | k -= 16;␊ |
642 | }␊ |
643 | if (k != 0) do {␊ |
644 | s1 += *buf++;␊ |
645 | s2 += s1;␊ |
646 | } while (--k);␊ |
647 | s1 %= BASE;␊ |
648 | s2 %= BASE;␊ |
649 | }␊ |
650 | result = (s2 << 16) | s1;␊ |
651 | return OSSwapHostToBigInt32(result);␊ |
652 | }␊ |
653 |