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1da177e4 LT |
1 | /* |
2 | * linux/include/asm-arm/arch-rpc/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 *)SCREEN_START) | |
11 | ||
12 | #include <asm/hardware.h> | |
13 | #include <asm/io.h> | |
14 | ||
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]; | |
18 | ||
19 | struct param_struct { | |
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]; | |
35 | }; | |
36 | ||
37 | static const unsigned long palette_4[16] = { | |
38 | 0x00000000, | |
39 | 0x000000cc, | |
40 | 0x0000cc00, /* Green */ | |
41 | 0x0000cccc, /* Yellow */ | |
42 | 0x00cc0000, /* Blue */ | |
43 | 0x00cc00cc, /* Magenta */ | |
44 | 0x00cccc00, /* Cyan */ | |
45 | 0x00cccccc, /* White */ | |
46 | 0x00000000, | |
47 | 0x000000ff, | |
48 | 0x0000ff00, | |
49 | 0x0000ffff, | |
50 | 0x00ff0000, | |
51 | 0x00ff00ff, | |
52 | 0x00ffff00, | |
53 | 0x00ffffff | |
54 | }; | |
55 | ||
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) | |
58 | ||
59 | /* | |
60 | * params_phys is a linker defined symbol - see | |
61 | * arch/arm/boot/compressed/Makefile | |
62 | */ | |
63 | extern __attribute__((pure)) struct param_struct *params(void); | |
64 | #define params (params()) | |
65 | ||
66 | #ifndef STANDALONE_DEBUG | |
67 | /* | |
68 | * This does not append a newline | |
69 | */ | |
70 | static void putstr(const char *s) | |
71 | { | |
72 | extern void ll_write_char(char *, char c, char white); | |
73 | int x,y; | |
74 | unsigned char c; | |
75 | char *ptr; | |
76 | ||
77 | x = params->video_x; | |
78 | y = params->video_y; | |
79 | ||
80 | while ( ( c = *(unsigned char *)s++ ) != '\0' ) { | |
81 | if ( c == '\n' ) { | |
82 | x = 0; | |
83 | if ( ++y >= video_num_lines ) { | |
84 | y--; | |
85 | } | |
86 | } else { | |
87 | ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h); | |
88 | ll_write_char(ptr, c, white); | |
89 | if ( ++x >= video_num_columns ) { | |
90 | x = 0; | |
91 | if ( ++y >= video_num_lines ) { | |
92 | y--; | |
93 | } | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
98 | params->video_x = x; | |
99 | params->video_y = y; | |
100 | } | |
101 | ||
102 | static void error(char *x); | |
103 | ||
104 | /* | |
105 | * Setup for decompression | |
106 | */ | |
107 | static void arch_decomp_setup(void) | |
108 | { | |
109 | int i; | |
110 | ||
111 | video_num_lines = params->video_num_rows; | |
112 | video_num_columns = params->video_num_cols; | |
113 | bytes_per_char_h = params->bytes_per_char_h; | |
114 | video_size_row = video_num_columns * bytes_per_char_h; | |
115 | if (bytes_per_char_h == 4) | |
116 | for (i = 0; i < 256; i++) | |
117 | con_charconvtable[i] = | |
118 | (i & 128 ? 1 << 0 : 0) | | |
119 | (i & 64 ? 1 << 4 : 0) | | |
120 | (i & 32 ? 1 << 8 : 0) | | |
121 | (i & 16 ? 1 << 12 : 0) | | |
122 | (i & 8 ? 1 << 16 : 0) | | |
123 | (i & 4 ? 1 << 20 : 0) | | |
124 | (i & 2 ? 1 << 24 : 0) | | |
125 | (i & 1 ? 1 << 28 : 0); | |
126 | else | |
127 | for (i = 0; i < 16; i++) | |
128 | con_charconvtable[i] = | |
129 | (i & 8 ? 1 << 0 : 0) | | |
130 | (i & 4 ? 1 << 8 : 0) | | |
131 | (i & 2 ? 1 << 16 : 0) | | |
132 | (i & 1 ? 1 << 24 : 0); | |
133 | ||
134 | ||
135 | palette_setpixel(0); | |
136 | if (bytes_per_char_h == 1) { | |
137 | palette_write (0); | |
138 | palette_write (0x00ffffff); | |
139 | for (i = 2; i < 256; i++) | |
140 | palette_write (0); | |
141 | white = 1; | |
142 | } else { | |
143 | for (i = 0; i < 256; i++) | |
144 | palette_write (i < 16 ? palette_4[i] : 0); | |
145 | white = 7; | |
146 | } | |
147 | ||
148 | if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n"); | |
149 | } | |
150 | #endif | |
151 | ||
152 | /* | |
153 | * nothing to do | |
154 | */ | |
155 | #define arch_decomp_wdog() |