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Source at commit 1066 created 12 years 9 months ago.
By meklort, Removing even more code...
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 "sl.h"␊
55#include "libsa.h"␊
56#include "platform.h"␊
57#include "modules.h"␊
58␊
59long gBootMode; /* defaults to 0 == kBootModeNormal */␊
60bool gOverrideKernel;␊
61char *gPlatformName;␊
62char gRootDevice[512];␊
63char gMKextName[512];␊
64char gMacOSVersion[8];␊
65bool gEnableCDROMRescan;␊
66bool gScanSingleDrive;␊
67␊
68int bvCount = 0;␊
69int gDeviceCount = 0; ␊
70␊
71BVRef bvr;␊
72BVRef menuBVR;␊
73BVRef bvChain;␊
74bool useGUI;␊
75␊
76/*␊
77 * How long to wait (in seconds) to load the␊
78 * kernel after displaying the "boot:" prompt.␊
79 */␊
80#define kBootErrorTimeout 5␊
81␊
82/*␊
83 * Default path to kernel cache file␊
84 */␊
85//Slice - first one for Leopard␊
86#define kDefaultCachePathLeo "/System/Library/Caches/com.apple.kernelcaches/"␊
87#define kDefaultCachePathSnow "/System/Library/Caches/com.apple.kext.caches/Startup/"␊
88␊
89//==========================================================================␊
90// Zero the BSS.␊
91␊
92static void zeroBSS(void)␊
93{␊
94␉extern char _DATA__bss__begin, _DATA__bss__end;␊
95␉extern char _DATA__common__begin, _DATA__common__end;␊
96␊
97␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
98␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
99}␊
100␊
101//==========================================================================␊
102// Malloc error function␊
103␊
104static void malloc_error(char *addr, size_t size, const char *file, int line)␊
105{␊
106␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
107}␊
108␊
109//==========================================================================␊
110//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
111//␊
112void initialize_runtime(void)␊
113{␊
114␉zeroBSS();␊
115␉malloc_init(0, 0, 0, malloc_error);␊
116}␊
117␊
118//==========================================================================␊
119// This is the entrypoint from real-mode which functions exactly as it did␊
120// before. Multiboot does its own runtime initialization, does some of its␊
121// own things, and then calls common_boot.␊
122void boot(int biosdev)␊
123{␊
124␉initialize_runtime();␊
125␉// Enable A20 gate before accessing memory above 1Mb.␊
126␉enableA20();␊
127␉common_boot(biosdev);␊
128}␊
129␊
130//==========================================================================␊
131// The 'main' function for the booter. Called by boot0 when booting␊
132// from a block device, or by the network booter.␊
133//␊
134// arguments:␊
135// biosdev - Value passed from boot1/NBP to specify the device␊
136// that the booter was loaded from.␊
137//␊
138// If biosdev is kBIOSDevNetwork, then this function will return if␊
139// booting was unsuccessful. This allows the PXE firmware to try the␊
140// next boot device on its list.␊
141void common_boot(int biosdev)␊
142{␊
143 //unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
144// unsigned int denyBVFlags = kBVFlagEFISystem;␊
145␊
146 // Setup VGA text mode.␊
147 // Not sure if it is safe to call setVideoMode() before the␊
148 // config table has been loaded. Call video_mode() instead.␊
149 video_mode( 2 ); // 80x25 mono text mode.␊
150␊
151 // TOOD: move to a module␊
152 /*␊
153 // Scan and record the system's hardware information.␊
154 scan_platform();␊
155␊
156 // First get info for boot volume.␊
157 scanBootVolumes(gBIOSDev, 0);␊
158 ␊
159 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
160 ␊
161 setBootGlobals(bvChain);␊
162 ␊
163 scanDisks(gBIOSDev, &bvCount);␊
164␊
165 // Create a separated bvr chain using the specified filters.␊
166 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
167␊
168 gBootVolume = selectBootVolume(bvChain);␊
169 */␊
170␉// Intialize module system ␊
171␉init_module_system();␊
172}

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Revision: 1066