Commit | Line | Data |
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1da177e4 | 1 | /* |
a09e64fb | 2 | * arch/arm/mach-rpc/include/mach/uncompress.h |
1da177e4 LT |
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 | ||
fced80c7 | 12 | #include <linux/io.h> |
a09e64fb | 13 | #include <mach/hardware.h> |
e16edefe AH |
14 | #include <asm/setup.h> |
15 | #include <asm/page.h> | |
1da177e4 | 16 | |
e16edefe AH |
17 | int video_size_row; |
18 | unsigned char bytes_per_char_h; | |
1da177e4 LT |
19 | extern unsigned long con_charconvtable[256]; |
20 | ||
21 | struct param_struct { | |
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]; | |
37 | }; | |
38 | ||
39 | static const unsigned long palette_4[16] = { | |
40 | 0x00000000, | |
41 | 0x000000cc, | |
42 | 0x0000cc00, /* Green */ | |
43 | 0x0000cccc, /* Yellow */ | |
44 | 0x00cc0000, /* Blue */ | |
45 | 0x00cc00cc, /* Magenta */ | |
46 | 0x00cccc00, /* Cyan */ | |
47 | 0x00cccccc, /* White */ | |
48 | 0x00000000, | |
49 | 0x000000ff, | |
50 | 0x0000ff00, | |
51 | 0x0000ffff, | |
52 | 0x00ff0000, | |
53 | 0x00ff00ff, | |
54 | 0x00ffff00, | |
55 | 0x00ffffff | |
56 | }; | |
57 | ||
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) | |
60 | ||
61 | /* | |
62 | * params_phys is a linker defined symbol - see | |
63 | * arch/arm/boot/compressed/Makefile | |
64 | */ | |
65 | extern __attribute__((pure)) struct param_struct *params(void); | |
66 | #define params (params()) | |
67 | ||
68 | #ifndef STANDALONE_DEBUG | |
e16edefe AH |
69 | static unsigned long video_num_cols; |
70 | static unsigned long video_num_rows; | |
71 | static unsigned long video_x; | |
72 | static unsigned long video_y; | |
73 | static unsigned char bytes_per_char_v; | |
74 | static int white; | |
75 | ||
1da177e4 LT |
76 | /* |
77 | * This does not append a newline | |
78 | */ | |
a081568d | 79 | static void putc(int c) |
1da177e4 LT |
80 | { |
81 | extern void ll_write_char(char *, char c, char white); | |
82 | int x,y; | |
1da177e4 LT |
83 | char *ptr; |
84 | ||
e16edefe AH |
85 | x = video_x; |
86 | y = video_y; | |
1da177e4 | 87 | |
a081568d | 88 | if (c == '\n') { |
e16edefe | 89 | if (++y >= video_num_rows) |
a081568d RK |
90 | y--; |
91 | } else if (c == '\r') { | |
92 | x = 0; | |
93 | } else { | |
e16edefe | 94 | ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h); |
a081568d | 95 | ll_write_char(ptr, c, white); |
e16edefe | 96 | if (++x >= video_num_cols) { |
1da177e4 | 97 | x = 0; |
e16edefe | 98 | if ( ++y >= video_num_rows ) { |
1da177e4 LT |
99 | y--; |
100 | } | |
1da177e4 LT |
101 | } |
102 | } | |
103 | ||
e16edefe AH |
104 | video_x = x; |
105 | video_y = y; | |
1da177e4 LT |
106 | } |
107 | ||
a081568d RK |
108 | static inline void flush(void) |
109 | { | |
110 | } | |
111 | ||
1da177e4 LT |
112 | static void error(char *x); |
113 | ||
114 | /* | |
115 | * Setup for decompression | |
116 | */ | |
117 | static void arch_decomp_setup(void) | |
118 | { | |
119 | int i; | |
e16edefe AH |
120 | struct tag *t = (struct tag *)params; |
121 | unsigned int nr_pages = 0, page_size = PAGE_SIZE; | |
122 | ||
123 | if (t->hdr.tag == ATAG_CORE) | |
124 | { | |
125 | for (; t->hdr.size; t = tag_next(t)) | |
126 | { | |
127 | if (t->hdr.tag == ATAG_VIDEOTEXT) | |
128 | { | |
129 | video_num_rows = t->u.videotext.video_lines; | |
130 | video_num_cols = t->u.videotext.video_cols; | |
131 | bytes_per_char_h = t->u.videotext.video_points; | |
132 | bytes_per_char_v = t->u.videotext.video_points; | |
133 | video_x = t->u.videotext.x; | |
134 | video_y = t->u.videotext.y; | |
135 | } | |
136 | ||
137 | if (t->hdr.tag == ATAG_MEM) | |
138 | { | |
139 | page_size = PAGE_SIZE; | |
140 | nr_pages += (t->u.mem.size / PAGE_SIZE); | |
141 | } | |
142 | } | |
143 | } | |
144 | else | |
145 | { | |
146 | nr_pages = params->nr_pages; | |
147 | page_size = params->page_size; | |
148 | video_num_rows = params->video_num_rows; | |
149 | video_num_cols = params->video_num_cols; | |
150 | video_x = params->video_x; | |
151 | video_y = params->video_y; | |
152 | bytes_per_char_h = params->bytes_per_char_h; | |
153 | bytes_per_char_v = params->bytes_per_char_v; | |
154 | } | |
155 | ||
156 | video_size_row = video_num_cols * bytes_per_char_h; | |
1da177e4 | 157 | |
1da177e4 LT |
158 | if (bytes_per_char_h == 4) |
159 | for (i = 0; i < 256; i++) | |
160 | con_charconvtable[i] = | |
161 | (i & 128 ? 1 << 0 : 0) | | |
162 | (i & 64 ? 1 << 4 : 0) | | |
163 | (i & 32 ? 1 << 8 : 0) | | |
164 | (i & 16 ? 1 << 12 : 0) | | |
165 | (i & 8 ? 1 << 16 : 0) | | |
166 | (i & 4 ? 1 << 20 : 0) | | |
167 | (i & 2 ? 1 << 24 : 0) | | |
168 | (i & 1 ? 1 << 28 : 0); | |
169 | else | |
170 | for (i = 0; i < 16; i++) | |
171 | con_charconvtable[i] = | |
172 | (i & 8 ? 1 << 0 : 0) | | |
173 | (i & 4 ? 1 << 8 : 0) | | |
174 | (i & 2 ? 1 << 16 : 0) | | |
175 | (i & 1 ? 1 << 24 : 0); | |
176 | ||
177 | ||
178 | palette_setpixel(0); | |
179 | if (bytes_per_char_h == 1) { | |
180 | palette_write (0); | |
181 | palette_write (0x00ffffff); | |
182 | for (i = 2; i < 256; i++) | |
183 | palette_write (0); | |
184 | white = 1; | |
185 | } else { | |
186 | for (i = 0; i < 256; i++) | |
187 | palette_write (i < 16 ? palette_4[i] : 0); | |
188 | white = 7; | |
189 | } | |
190 | ||
e16edefe | 191 | if (nr_pages * page_size < 4096*1024) error("<4M of mem\n"); |
1da177e4 LT |
192 | } |
193 | #endif | |
194 | ||
195 | /* | |
196 | * nothing to do | |
197 | */ | |
198 | #define arch_decomp_wdog() |