summaryrefslogtreecommitdiff
path: root/arch/arm26/boot/compressed/uncompress.h
blob: 66d9b938a7a492f81e53ec13d0d8ee619ec9173b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
/*
 *
 *  Copyright (C) 1996 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#define VIDMEM ((char *)0x02000000)
 
int video_num_columns, video_num_lines, video_size_row;
int white, bytes_per_char_h;
extern unsigned long con_charconvtable[256];

struct param_struct {
	unsigned long page_size;
	unsigned long nr_pages;
	unsigned long ramdisk_size;
	unsigned long mountrootrdonly;
	unsigned long rootdev;
	unsigned long video_num_cols;
	unsigned long video_num_rows;
	unsigned long video_x;
	unsigned long video_y;
	unsigned long memc_control_reg;
	unsigned char sounddefault;
	unsigned char adfsdrives;
	unsigned char bytes_per_char_h;
	unsigned char bytes_per_char_v;
	unsigned long unused[256/4-11];
};

static struct param_struct *params = (struct param_struct *)0x0207c000;
 
/*
 * This does not append a newline
 */
static void puts(const char *s)
{
	extern void ll_write_char(char *, unsigned long);
	int x,y;
	unsigned char c;
	char *ptr;

	x = params->video_x;
	y = params->video_y;

	while ( ( c = *(unsigned char *)s++ ) != '\0' ) {
		if ( c == '\n' ) {
			x = 0;
			if ( ++y >= video_num_lines ) {
				y--;
			}
		} else {
			ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
			ll_write_char(ptr, c|(white<<16));
			if ( ++x >= video_num_columns ) {
				x = 0;
				if ( ++y >= video_num_lines ) {
					y--;
				}
			}
		}
	}

	params->video_x = x;
	params->video_y = y;
}

static void error(char *x);

/*
 * Setup for decompression
 */
static void arch_decomp_setup(void)
{
	int i;
	
	video_num_lines = params->video_num_rows;
	video_num_columns = params->video_num_cols;
	bytes_per_char_h = params->bytes_per_char_h;
	video_size_row = video_num_columns * bytes_per_char_h;
	if (bytes_per_char_h == 4)
		for (i = 0; i < 256; i++)
			con_charconvtable[i] =
				(i & 128 ? 1 << 0  : 0) |
				(i & 64  ? 1 << 4  : 0) |
				(i & 32  ? 1 << 8  : 0) |
				(i & 16  ? 1 << 12 : 0) |
				(i & 8   ? 1 << 16 : 0) |
				(i & 4   ? 1 << 20 : 0) |
				(i & 2   ? 1 << 24 : 0) |
				(i & 1   ? 1 << 28 : 0);
	else
		for (i = 0; i < 16; i++)
			con_charconvtable[i] =
				(i & 8   ? 1 << 0  : 0) |
				(i & 4   ? 1 << 8  : 0) |
				(i & 2   ? 1 << 16 : 0) |
				(i & 1   ? 1 << 24 : 0);

	white = bytes_per_char_h == 8 ? 0xfc : 7;

	if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
}

/*
 * nothing to do
 */
#define arch_decomp_wdog()