Chameleon

Chameleon Svn Source Tree

Root/branches/rewrite/i386/boot2/boot.c

Source at commit 1068 created 12 years 9 months ago.
By meklort, Remove some libsaio files...
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 "modules.h"␊
57␊
58long gBootMode; /* defaults to 0 == kBootModeNormal */␊
59bool gOverrideKernel;␊
60char *gPlatformName;␊
61char gRootDevice[512];␊
62char gMKextName[512];␊
63char gMacOSVersion[8];␊
64bool gEnableCDROMRescan;␊
65bool gScanSingleDrive;␊
66␊
67int bvCount = 0;␊
68int gDeviceCount = 0; ␊
69␊
70BVRef bvr;␊
71BVRef menuBVR;␊
72BVRef bvChain;␊
73bool useGUI;␊
74␊
75/*␊
76 * How long to wait (in seconds) to load the␊
77 * kernel after displaying the "boot:" prompt.␊
78 */␊
79#define kBootErrorTimeout 5␊
80␊
81/*␊
82 * Default path to kernel cache file␊
83 */␊
84//Slice - first one for Leopard␊
85#define kDefaultCachePathLeo "/System/Library/Caches/com.apple.kernelcaches/"␊
86#define kDefaultCachePathSnow "/System/Library/Caches/com.apple.kext.caches/Startup/"␊
87␊
88//==========================================================================␊
89// Zero the BSS.␊
90␊
91static void zeroBSS(void)␊
92{␊
93␉extern char _DATA__bss__begin, _DATA__bss__end;␊
94␉extern char _DATA__common__begin, _DATA__common__end;␊
95␊
96␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
97␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
98}␊
99␊
100//==========================================================================␊
101// Malloc error function␊
102␊
103static void malloc_error(char *addr, size_t size, const char *file, int line)␊
104{␊
105␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
106}␊
107␊
108//==========================================================================␊
109//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
110//␊
111void initialize_runtime(void)␊
112{␊
113␉zeroBSS();␊
114␉malloc_init(0, 0, 0, malloc_error);␊
115}␊
116␊
117//==========================================================================␊
118// This is the entrypoint from real-mode which functions exactly as it did␊
119// before. Multiboot does its own runtime initialization, does some of its␊
120// own things, and then calls common_boot.␊
121void boot(int biosdev)␊
122{␊
123␉initialize_runtime();␊
124␉// Enable A20 gate before accessing memory above 1Mb.␊
125␉enableA20();␊
126␉common_boot(biosdev);␊
127}␊
128␊
129//==========================================================================␊
130// The 'main' function for the booter. Called by boot0 when booting␊
131// from a block device, or by the network booter.␊
132//␊
133// arguments:␊
134// biosdev - Value passed from boot1/NBP to specify the device␊
135// that the booter was loaded from.␊
136//␊
137// If biosdev is kBIOSDevNetwork, then this function will return if␊
138// booting was unsuccessful. This allows the PXE firmware to try the␊
139// next boot device on its list.␊
140void common_boot(int biosdev)␊
141{␊
142 //unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
143// unsigned int denyBVFlags = kBVFlagEFISystem;␊
144␊
145 // Setup VGA text mode.␊
146 // Not sure if it is safe to call setVideoMode() before the␊
147 // config table has been loaded. Call video_mode() instead.␊
148 video_mode( 2 ); // 80x25 mono text mode.␊
149␊
150 // TOOD: move to a module␊
151 /*␊
152 // Scan and record the system's hardware information.␊
153 scan_platform();␊
154␊
155 // First get info for boot volume.␊
156 scanBootVolumes(gBIOSDev, 0);␊
157 ␊
158 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
159 ␊
160 setBootGlobals(bvChain);␊
161 ␊
162 scanDisks(gBIOSDev, &bvCount);␊
163␊
164 // Create a separated bvr chain using the specified filters.␊
165 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
166␊
167 gBootVolume = selectBootVolume(bvChain);␊
168 */␊
169␉// Intialize module system ␊
170␉init_module_system();␊
171}

Archive Download this file

Revision: 1068