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Source at commit 1312 created 9 years 5 months ago.
By meklort, Update malloc_init in i386 boot file
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#include "memory.h"
57
58extern void init_module_system();
59extern int execute_hook(const char* name, void*, void*, void*, void*);
60
61extern void bzero(void * dst, size_t len);
62extern void enableA20(void);
63extern void video_mode(int mode);
64extern void malloc_init(char * start, int size, int nodes, void (*malloc_error)(char *, size_t, const char *, int));
65
66//==========================================================================
67// Zero the BSS.
68
69static void zeroBSS(void)
70{
71extern char _DATA__bss__begin, _DATA__bss__end;
72extern char _DATA__common__begin, _DATA__common__end;
73
74bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));
75bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));
76}
77
78//==========================================================================
79// Malloc error function
80
81static void malloc_error(char *addr, size_t size, const char *file, int line)
82{
83printf("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);
84while(1);
85}
86
87//==========================================================================
88//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.
89//
90void initialize_runtime(void)
91{
92zeroBSS();
93malloc_init((void*)ZALLOC_ADDR, ZALLOC_LEN, 16384, malloc_error);
94}
95
96//==========================================================================
97// This is the entrypoint from real.
98void boot(int biosdev)
99{
100initialize_runtime();
101// Enable A20 gate before accessing memory above 1Mb.
102enableA20();
103common_boot(biosdev);
104}
105
106//==========================================================================
107// The 'main' function for the booter. Called by boot0 when booting
108// from a block device, or by the network booter.
109//
110// arguments:
111// biosdev - Value passed from boot1/NBP to specify the device
112// that the booter was loaded from.
113void common_boot(int biosdev)
114{
115 video_mode( 2 ); // 80x25 mono text mode.
116
117// Intialize module system
118init_module_system();
119
120 int loopCount = 0;
121 while(1)
122 {
123 execute_hook("WorkLoop", (void*)loopCount++, 0, 0, 0);// Main work loop
124 }
125}
126

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Revision: 1312