File: /usr/src/linux/include/asm-arm/arch-arc/uncompress.h

1     /*
2      *  linux/include/asm-arm/arch-arc/uncompress.h
3      *
4      *  Copyright (C) 1996 Russell King
5      *
6      * This program is free software; you can redistribute it and/or modify
7      * it under the terms of the GNU General Public License version 2 as
8      * published by the Free Software Foundation.
9      */
10     #define VIDMEM ((char *)0x02000000)
11      
12     int video_num_columns, video_num_lines, video_size_row;
13     int white, bytes_per_char_h;
14     extern unsigned long con_charconvtable[256];
15     
16     struct param_struct {
17     	unsigned long page_size;
18     	unsigned long nr_pages;
19     	unsigned long ramdisk_size;
20     	unsigned long mountrootrdonly;
21     	unsigned long rootdev;
22     	unsigned long video_num_cols;
23     	unsigned long video_num_rows;
24     	unsigned long video_x;
25     	unsigned long video_y;
26     	unsigned long memc_control_reg;
27     	unsigned char sounddefault;
28     	unsigned char adfsdrives;
29     	unsigned char bytes_per_char_h;
30     	unsigned char bytes_per_char_v;
31     	unsigned long unused[256/4-11];
32     };
33     
34     static struct param_struct *params = (struct param_struct *)0x0207c000;
35      
36     /*
37      * This does not append a newline
38      */
39     static void puts(const char *s)
40     {
41     	extern void ll_write_char(char *, unsigned long);
42     	int x,y;
43     	unsigned char c;
44     	char *ptr;
45     
46     	x = params->video_x;
47     	y = params->video_y;
48     
49     	while ( ( c = *(unsigned char *)s++ ) != '\0' ) {
50     		if ( c == '\n' ) {
51     			x = 0;
52     			if ( ++y >= video_num_lines ) {
53     				y--;
54     			}
55     		} else {
56     			ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
57     			ll_write_char(ptr, c|(white<<16));
58     			if ( ++x >= video_num_columns ) {
59     				x = 0;
60     				if ( ++y >= video_num_lines ) {
61     					y--;
62     				}
63     			}
64     		}
65     	}
66     
67     	params->video_x = x;
68     	params->video_y = y;
69     }
70     
71     static void error(char *x);
72     
73     /*
74      * Setup for decompression
75      */
76     static void arch_decomp_setup(void)
77     {
78     	int i;
79     	
80     	video_num_lines = params->video_num_rows;
81     	video_num_columns = params->video_num_cols;
82     	bytes_per_char_h = params->bytes_per_char_h;
83     	video_size_row = video_num_columns * bytes_per_char_h;
84     	if (bytes_per_char_h == 4)
85     		for (i = 0; i < 256; i++)
86     			con_charconvtable[i] =
87     				(i & 128 ? 1 << 0  : 0) |
88     				(i & 64  ? 1 << 4  : 0) |
89     				(i & 32  ? 1 << 8  : 0) |
90     				(i & 16  ? 1 << 12 : 0) |
91     				(i & 8   ? 1 << 16 : 0) |
92     				(i & 4   ? 1 << 20 : 0) |
93     				(i & 2   ? 1 << 24 : 0) |
94     				(i & 1   ? 1 << 28 : 0);
95     	else
96     		for (i = 0; i < 16; i++)
97     			con_charconvtable[i] =
98     				(i & 8   ? 1 << 0  : 0) |
99     				(i & 4   ? 1 << 8  : 0) |
100     				(i & 2   ? 1 << 16 : 0) |
101     				(i & 1   ? 1 << 24 : 0);
102     
103     	white = bytes_per_char_h == 8 ? 0xfc : 7;
104     
105     	if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
106     }
107     
108     /*
109      * nothing to do
110      */
111     #define arch_decomp_wdog()
112