Chameleon

Chameleon Svn Source Tree

Root/branches/xZenu/src/arch/i386/boot2/boot.c

Source at commit 1298 created 9 years 2 months ago.
By meklort, Remove libsa.
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 <stdio.h>
54
55#include "boot.h"
56
57extern void init_module_system();
58extern int execute_hook(const char* name, void*, void*, void*, void*);
59
60extern void bzero(void * dst, size_t len);
61extern void enableA20(void);
62extern void video_mode(int mode);
63extern void malloc_init(char * start, int size, int nodes, void (*malloc_error)(char *, size_t, const char *, int));
64
65//==========================================================================
66// Zero the BSS.
67
68static void zeroBSS(void)
69{
70extern char _DATA__bss__begin, _DATA__bss__end;
71extern char _DATA__common__begin, _DATA__common__end;
72
73bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));
74bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));
75}
76
77//==========================================================================
78// Malloc error function
79
80static void malloc_error(char *addr, size_t size, const char *file, int line)
81{
82printf("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);
83while(1);
84}
85
86//==========================================================================
87//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.
88//
89void initialize_runtime(void)
90{
91zeroBSS();
92malloc_init(0, 0, 0, malloc_error);
93}
94
95//==========================================================================
96// This is the entrypoint from real.
97void boot(int biosdev)
98{
99initialize_runtime();
100// Enable A20 gate before accessing memory above 1Mb.
101enableA20();
102common_boot(biosdev);
103}
104
105//==========================================================================
106// The 'main' function for the booter. Called by boot0 when booting
107// from a block device, or by the network booter.
108//
109// arguments:
110// biosdev - Value passed from boot1/NBP to specify the device
111// that the booter was loaded from.
112void common_boot(int biosdev)
113{
114 video_mode( 2 ); // 80x25 mono text mode.
115
116// Intialize module system
117init_module_system();
118
119 int loopCount = 0;
120 while(1)
121 {
122 execute_hook("WorkLoop", (void*)loopCount++, 0, 0, 0);// Main work loop
123 }
124}
125

Archive Download this file

Revision: 1298