2 * linux/include/asm-arm/arch-rpc/uncompress.h
4 * Copyright (C) 1996 Russell King
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.
10 #define VIDMEM ((char *)SCREEN_START)
12 #include <asm/hardware.h>
15 int video_num_columns, video_num_lines, video_size_row;
16 int white, bytes_per_char_h;
17 extern unsigned long con_charconvtable[256];
20 unsigned long page_size;
21 unsigned long nr_pages;
22 unsigned long ramdisk_size;
23 unsigned long mountrootrdonly;
24 unsigned long rootdev;
25 unsigned long video_num_cols;
26 unsigned long video_num_rows;
27 unsigned long video_x;
28 unsigned long video_y;
29 unsigned long memc_control_reg;
30 unsigned char sounddefault;
31 unsigned char adfsdrives;
32 unsigned char bytes_per_char_h;
33 unsigned char bytes_per_char_v;
34 unsigned long unused[256/4-11];
37 static const unsigned long palette_4[16] = {
40 0x0000cc00, /* Green */
41 0x0000cccc, /* Yellow */
42 0x00cc0000, /* Blue */
43 0x00cc00cc, /* Magenta */
44 0x00cccc00, /* Cyan */
45 0x00cccccc, /* White */
56 #define palette_setpixel(p) *(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255)
57 #define palette_write(v) *(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff)
59 static struct param_struct *params = (struct param_struct *)PARAMS_PHYS;
61 #ifndef STANDALONE_DEBUG
63 * This does not append a newline
65 static void puts(const char *s)
67 extern void ll_write_char(char *, char c, char white);
75 while ( ( c = *(unsigned char *)s++ ) != '\0' ) {
78 if ( ++y >= video_num_lines ) {
82 ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
83 ll_write_char(ptr, c, white);
84 if ( ++x >= video_num_columns ) {
86 if ( ++y >= video_num_lines ) {
97 static void error(char *x);
100 * Setup for decompression
102 static void arch_decomp_setup(void)
106 video_num_lines = params->video_num_rows;
107 video_num_columns = params->video_num_cols;
108 bytes_per_char_h = params->bytes_per_char_h;
109 video_size_row = video_num_columns * bytes_per_char_h;
110 if (bytes_per_char_h == 4)
111 for (i = 0; i < 256; i++)
112 con_charconvtable[i] =
113 (i & 128 ? 1 << 0 : 0) |
114 (i & 64 ? 1 << 4 : 0) |
115 (i & 32 ? 1 << 8 : 0) |
116 (i & 16 ? 1 << 12 : 0) |
117 (i & 8 ? 1 << 16 : 0) |
118 (i & 4 ? 1 << 20 : 0) |
119 (i & 2 ? 1 << 24 : 0) |
120 (i & 1 ? 1 << 28 : 0);
122 for (i = 0; i < 16; i++)
123 con_charconvtable[i] =
124 (i & 8 ? 1 << 0 : 0) |
125 (i & 4 ? 1 << 8 : 0) |
126 (i & 2 ? 1 << 16 : 0) |
127 (i & 1 ? 1 << 24 : 0);
131 if (bytes_per_char_h == 1) {
133 palette_write (0x00ffffff);
134 for (i = 2; i < 256; i++)
138 for (i = 0; i < 256; i++)
139 palette_write (i < 16 ? palette_4[i] : 0);
143 if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
150 #define arch_decomp_wdog()