2 * arch/arm/mach-rpc/include/mach/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)
13 #include <mach/hardware.h>
14 #include <asm/setup.h>
18 unsigned char bytes_per_char_h;
19 extern unsigned long con_charconvtable[256];
22 unsigned long page_size;
23 unsigned long nr_pages;
24 unsigned long ramdisk_size;
25 unsigned long mountrootrdonly;
26 unsigned long rootdev;
27 unsigned long video_num_cols;
28 unsigned long video_num_rows;
29 unsigned long video_x;
30 unsigned long video_y;
31 unsigned long memc_control_reg;
32 unsigned char sounddefault;
33 unsigned char adfsdrives;
34 unsigned char bytes_per_char_h;
35 unsigned char bytes_per_char_v;
36 unsigned long unused[256/4-11];
39 static const unsigned long palette_4[16] = {
42 0x0000cc00, /* Green */
43 0x0000cccc, /* Yellow */
44 0x00cc0000, /* Blue */
45 0x00cc00cc, /* Magenta */
46 0x00cccc00, /* Cyan */
47 0x00cccccc, /* White */
58 #define palette_setpixel(p) *(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255)
59 #define palette_write(v) *(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff)
62 * params_phys is a linker defined symbol - see
63 * arch/arm/boot/compressed/Makefile
65 extern __attribute__((pure)) struct param_struct *params(void);
66 #define params (params())
68 #ifndef STANDALONE_DEBUG
69 unsigned long video_num_cols;
70 unsigned long video_num_rows;
71 unsigned long video_x;
72 unsigned long video_y;
73 unsigned char bytes_per_char_v;
77 * This does not append a newline
79 static void putc(int c)
81 extern void ll_write_char(char *, char c, char white);
89 if (++y >= video_num_rows)
91 } else if (c == '\r') {
94 ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h);
95 ll_write_char(ptr, c, white);
96 if (++x >= video_num_cols) {
98 if ( ++y >= video_num_rows ) {
108 static inline void flush(void)
113 * Setup for decompression
115 static void arch_decomp_setup(void)
118 struct tag *t = (struct tag *)params;
119 unsigned int nr_pages = 0, page_size = PAGE_SIZE;
121 if (t->hdr.tag == ATAG_CORE)
123 for (; t->hdr.size; t = tag_next(t))
125 if (t->hdr.tag == ATAG_VIDEOTEXT)
127 video_num_rows = t->u.videotext.video_lines;
128 video_num_cols = t->u.videotext.video_cols;
129 bytes_per_char_h = t->u.videotext.video_points;
130 bytes_per_char_v = t->u.videotext.video_points;
131 video_x = t->u.videotext.x;
132 video_y = t->u.videotext.y;
135 if (t->hdr.tag == ATAG_MEM)
137 page_size = PAGE_SIZE;
138 nr_pages += (t->u.mem.size / PAGE_SIZE);
144 nr_pages = params->nr_pages;
145 page_size = params->page_size;
146 video_num_rows = params->video_num_rows;
147 video_num_cols = params->video_num_cols;
148 video_x = params->video_x;
149 video_y = params->video_y;
150 bytes_per_char_h = params->bytes_per_char_h;
151 bytes_per_char_v = params->bytes_per_char_v;
154 video_size_row = video_num_cols * bytes_per_char_h;
156 if (bytes_per_char_h == 4)
157 for (i = 0; i < 256; i++)
158 con_charconvtable[i] =
159 (i & 128 ? 1 << 0 : 0) |
160 (i & 64 ? 1 << 4 : 0) |
161 (i & 32 ? 1 << 8 : 0) |
162 (i & 16 ? 1 << 12 : 0) |
163 (i & 8 ? 1 << 16 : 0) |
164 (i & 4 ? 1 << 20 : 0) |
165 (i & 2 ? 1 << 24 : 0) |
166 (i & 1 ? 1 << 28 : 0);
168 for (i = 0; i < 16; i++)
169 con_charconvtable[i] =
170 (i & 8 ? 1 << 0 : 0) |
171 (i & 4 ? 1 << 8 : 0) |
172 (i & 2 ? 1 << 16 : 0) |
173 (i & 1 ? 1 << 24 : 0);
177 if (bytes_per_char_h == 1) {
179 palette_write (0x00ffffff);
180 for (i = 2; i < 256; i++)
184 for (i = 0; i < 256; i++)
185 palette_write (i < 16 ? palette_4[i] : 0);
189 if (nr_pages * page_size < 4096*1024) error("<4M of mem\n");