Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/drivers/char/consolemap.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 21333 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /* |
2 | * consolemap.c |
3 | * |
4 | * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code) |
5 | * to font positions. |
6 | * |
7 | * aeb, 950210 |
8 | * |
9 | * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998 |
10 | * |
11 | * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998 |
12 | */ |
13 | |
14 | #include <linux/config.h> |
15 | #include <linux/module.h> |
16 | #include <linux/kd.h> |
17 | #include <linux/errno.h> |
18 | #include <linux/mm.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/init.h> |
21 | #include <linux/tty.h> |
22 | #include <asm/uaccess.h> |
23 | #include <linux/consolemap.h> |
24 | #include <linux/vt_kern.h> |
25 | |
26 | static unsigned short translations[][256] = { |
27 | /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */ |
28 | { |
29 | 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, |
30 | 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, |
31 | 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, |
32 | 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, |
33 | 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, |
34 | 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, |
35 | 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, |
36 | 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, |
37 | 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, |
38 | 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, |
39 | 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, |
40 | 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, |
41 | 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, |
42 | 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, |
43 | 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, |
44 | 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f, |
45 | 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, |
46 | 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, |
47 | 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, |
48 | 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, |
49 | 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, |
50 | 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, |
51 | 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, |
52 | 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, |
53 | 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, |
54 | 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, |
55 | 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, |
56 | 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, |
57 | 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, |
58 | 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, |
59 | 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, |
60 | 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff |
61 | }, |
62 | /* VT100 graphics mapped to Unicode */ |
63 | { |
64 | 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, |
65 | 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, |
66 | 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, |
67 | 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, |
68 | 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, |
69 | 0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f, |
70 | 0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, |
71 | 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, |
72 | 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, |
73 | 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, |
74 | 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, |
75 | 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0, |
76 | 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1, |
77 | 0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba, |
78 | 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c, |
79 | 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f, |
80 | 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, |
81 | 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, |
82 | 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, |
83 | 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, |
84 | 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, |
85 | 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, |
86 | 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, |
87 | 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, |
88 | 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, |
89 | 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, |
90 | 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, |
91 | 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, |
92 | 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, |
93 | 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, |
94 | 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, |
95 | 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff |
96 | }, |
97 | /* IBM Codepage 437 mapped to Unicode */ |
98 | { |
99 | 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022, |
100 | 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c, |
101 | 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8, |
102 | 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc, |
103 | 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, |
104 | 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, |
105 | 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, |
106 | 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, |
107 | 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, |
108 | 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, |
109 | 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, |
110 | 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, |
111 | 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, |
112 | 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, |
113 | 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, |
114 | 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302, |
115 | 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7, |
116 | 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5, |
117 | 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9, |
118 | 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192, |
119 | 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba, |
120 | 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb, |
121 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, |
122 | 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510, |
123 | 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f, |
124 | 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567, |
125 | 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b, |
126 | 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580, |
127 | 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4, |
128 | 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229, |
129 | 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248, |
130 | 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0 |
131 | }, |
132 | /* User mapping -- default to codes for direct font mapping */ |
133 | { |
134 | 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007, |
135 | 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f, |
136 | 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017, |
137 | 0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f, |
138 | 0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027, |
139 | 0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f, |
140 | 0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037, |
141 | 0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f, |
142 | 0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047, |
143 | 0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f, |
144 | 0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057, |
145 | 0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f, |
146 | 0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067, |
147 | 0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f, |
148 | 0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077, |
149 | 0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f, |
150 | 0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087, |
151 | 0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f, |
152 | 0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097, |
153 | 0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f, |
154 | 0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7, |
155 | 0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af, |
156 | 0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7, |
157 | 0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf, |
158 | 0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7, |
159 | 0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf, |
160 | 0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7, |
161 | 0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df, |
162 | 0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7, |
163 | 0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef, |
164 | 0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7, |
165 | 0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff |
166 | } |
167 | }; |
168 | |
169 | /* The standard kernel character-to-font mappings are not invertible |
170 | -- this is just a best effort. */ |
171 | |
172 | #define MAX_GLYPH 512 /* Max possible glyph value */ |
173 | |
174 | static int inv_translate[MAX_NR_CONSOLES]; |
175 | |
176 | struct uni_pagedir { |
177 | u16 **uni_pgdir[32]; |
178 | unsigned long refcount; |
179 | unsigned long sum; |
180 | unsigned char *inverse_translations[4]; |
181 | int readonly; |
182 | }; |
183 | |
184 | static struct uni_pagedir *dflt; |
185 | |
186 | static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i) |
187 | { |
188 | int j, glyph; |
189 | unsigned short *t = translations[i]; |
190 | unsigned char *q; |
191 | |
192 | if (!p) return; |
193 | q = p->inverse_translations[i]; |
194 | |
195 | if (!q) { |
196 | q = p->inverse_translations[i] = (unsigned char *) |
197 | kmalloc(MAX_GLYPH, GFP_KERNEL); |
198 | if (!q) return; |
199 | } |
200 | memset(q, 0, MAX_GLYPH); |
201 | |
202 | for (j = 0; j < E_TABSZ; j++) { |
203 | glyph = conv_uni_to_pc(conp, t[j]); |
204 | if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) { |
205 | /* prefer '-' above SHY etc. */ |
206 | q[glyph] = j; |
207 | } |
208 | } |
209 | } |
210 | |
211 | unsigned short *set_translate(int m, struct vc_data *vc) |
212 | { |
213 | inv_translate[vc->vc_num] = m; |
214 | return translations[m]; |
215 | } |
216 | |
217 | /* |
218 | * Inverse translation is impossible for several reasons: |
219 | * 1. The font<->character maps are not 1-1. |
220 | * 2. The text may have been written while a different translation map |
221 | * was active, or using Unicode. |
222 | * Still, it is now possible to a certain extent to cut and paste non-ASCII. |
223 | */ |
224 | unsigned char inverse_translate(struct vc_data *conp, int glyph) |
225 | { |
226 | struct uni_pagedir *p; |
227 | if (glyph < 0 || glyph >= MAX_GLYPH) |
228 | return 0; |
229 | else if (!(p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc) || |
230 | !p->inverse_translations[inv_translate[conp->vc_num]]) |
231 | return glyph; |
232 | else |
233 | return p->inverse_translations[inv_translate[conp->vc_num]][glyph]; |
234 | } |
235 | |
236 | static void update_user_maps(void) |
237 | { |
238 | int i; |
239 | struct uni_pagedir *p, *q = NULL; |
240 | |
241 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
242 | if (!vc_cons_allocated(i)) |
243 | continue; |
244 | p = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc; |
245 | if (p && p != q) { |
246 | set_inverse_transl(vc_cons[i].d, p, USER_MAP); |
247 | q = p; |
248 | } |
249 | } |
250 | } |
251 | |
252 | /* |
253 | * Load customizable translation table |
254 | * arg points to a 256 byte translation table. |
255 | * |
256 | * The "old" variants are for translation directly to font (using the |
257 | * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set |
258 | * Unicodes explicitly. |
259 | */ |
260 | int con_set_trans_old(unsigned char __user * arg) |
261 | { |
262 | int i; |
263 | unsigned short *p = translations[USER_MAP]; |
264 | |
265 | if (!access_ok(VERIFY_READ, arg, E_TABSZ)) |
266 | return -EFAULT; |
267 | |
268 | for (i=0; i<E_TABSZ ; i++) { |
269 | unsigned char uc; |
270 | __get_user(uc, arg+i); |
271 | p[i] = UNI_DIRECT_BASE | uc; |
272 | } |
273 | |
274 | update_user_maps(); |
275 | return 0; |
276 | } |
277 | |
278 | int con_get_trans_old(unsigned char __user * arg) |
279 | { |
280 | int i, ch; |
281 | unsigned short *p = translations[USER_MAP]; |
282 | |
283 | if (!access_ok(VERIFY_WRITE, arg, E_TABSZ)) |
284 | return -EFAULT; |
285 | |
286 | for (i=0; i<E_TABSZ ; i++) |
287 | { |
288 | ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]); |
289 | __put_user((ch & ~0xff) ? 0 : ch, arg+i); |
290 | } |
291 | return 0; |
292 | } |
293 | |
294 | int con_set_trans_new(ushort __user * arg) |
295 | { |
296 | int i; |
297 | unsigned short *p = translations[USER_MAP]; |
298 | |
299 | if (!access_ok(VERIFY_READ, arg, E_TABSZ*sizeof(unsigned short))) |
300 | return -EFAULT; |
301 | |
302 | for (i=0; i<E_TABSZ ; i++) { |
303 | unsigned short us; |
304 | __get_user(us, arg+i); |
305 | p[i] = us; |
306 | } |
307 | |
308 | update_user_maps(); |
309 | return 0; |
310 | } |
311 | |
312 | int con_get_trans_new(ushort __user * arg) |
313 | { |
314 | int i; |
315 | unsigned short *p = translations[USER_MAP]; |
316 | |
317 | if (!access_ok(VERIFY_WRITE, arg, E_TABSZ*sizeof(unsigned short))) |
318 | return -EFAULT; |
319 | |
320 | for (i=0; i<E_TABSZ ; i++) |
321 | __put_user(p[i], arg+i); |
322 | |
323 | return 0; |
324 | } |
325 | |
326 | /* |
327 | * Unicode -> current font conversion |
328 | * |
329 | * A font has at most 512 chars, usually 256. |
330 | * But one font position may represent several Unicode chars. |
331 | * A hashtable is somewhat of a pain to deal with, so use a |
332 | * "paged table" instead. Simulation has shown the memory cost of |
333 | * this 3-level paged table scheme to be comparable to a hash table. |
334 | */ |
335 | |
336 | extern u8 dfont_unicount[]; /* Defined in console_defmap.c */ |
337 | extern u16 dfont_unitable[]; |
338 | |
339 | static void con_release_unimap(struct uni_pagedir *p) |
340 | { |
341 | u16 **p1; |
342 | int i, j; |
343 | |
344 | if (p == dflt) dflt = NULL; |
345 | for (i = 0; i < 32; i++) { |
346 | if ((p1 = p->uni_pgdir[i]) != NULL) { |
347 | for (j = 0; j < 32; j++) |
348 | if (p1[j]) |
349 | kfree(p1[j]); |
350 | kfree(p1); |
351 | } |
352 | p->uni_pgdir[i] = NULL; |
353 | } |
354 | for (i = 0; i < 4; i++) |
355 | if (p->inverse_translations[i]) { |
356 | kfree(p->inverse_translations[i]); |
357 | p->inverse_translations[i] = NULL; |
358 | } |
359 | } |
360 | |
361 | void con_free_unimap(struct vc_data *vc) |
362 | { |
363 | struct uni_pagedir *p; |
364 | |
365 | p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
366 | if (!p) |
367 | return; |
368 | *vc->vc_uni_pagedir_loc = 0; |
369 | if (--p->refcount) |
370 | return; |
371 | con_release_unimap(p); |
372 | kfree(p); |
373 | } |
374 | |
375 | static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p) |
376 | { |
377 | int i, j, k; |
378 | struct uni_pagedir *q; |
379 | |
380 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
381 | if (!vc_cons_allocated(i)) |
382 | continue; |
383 | q = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc; |
384 | if (!q || q == p || q->sum != p->sum) |
385 | continue; |
386 | for (j = 0; j < 32; j++) { |
387 | u16 **p1, **q1; |
388 | p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j]; |
389 | if (!p1 && !q1) |
390 | continue; |
391 | if (!p1 || !q1) |
392 | break; |
393 | for (k = 0; k < 32; k++) { |
394 | if (!p1[k] && !q1[k]) |
395 | continue; |
396 | if (!p1[k] || !q1[k]) |
397 | break; |
398 | if (memcmp(p1[k], q1[k], 64*sizeof(u16))) |
399 | break; |
400 | } |
401 | if (k < 32) |
402 | break; |
403 | } |
404 | if (j == 32) { |
405 | q->refcount++; |
406 | *conp->vc_uni_pagedir_loc = (unsigned long)q; |
407 | con_release_unimap(p); |
408 | kfree(p); |
409 | return 1; |
410 | } |
411 | } |
412 | return 0; |
413 | } |
414 | |
415 | static int |
416 | con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos) |
417 | { |
418 | int i, n; |
419 | u16 **p1, *p2; |
420 | |
421 | if (!(p1 = p->uni_pgdir[n = unicode >> 11])) { |
422 | p1 = p->uni_pgdir[n] = kmalloc(32*sizeof(u16 *), GFP_KERNEL); |
423 | if (!p1) return -ENOMEM; |
424 | for (i = 0; i < 32; i++) |
425 | p1[i] = NULL; |
426 | } |
427 | |
428 | if (!(p2 = p1[n = (unicode >> 6) & 0x1f])) { |
429 | p2 = p1[n] = kmalloc(64*sizeof(u16), GFP_KERNEL); |
430 | if (!p2) return -ENOMEM; |
431 | memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */ |
432 | } |
433 | |
434 | p2[unicode & 0x3f] = fontpos; |
435 | |
436 | p->sum += (fontpos << 20) + unicode; |
437 | |
438 | return 0; |
439 | } |
440 | |
441 | /* ui is a leftover from using a hashtable, but might be used again */ |
442 | int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui) |
443 | { |
444 | struct uni_pagedir *p, *q; |
445 | |
446 | p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
447 | if (p && p->readonly) return -EIO; |
448 | if (!p || --p->refcount) { |
449 | q = (struct uni_pagedir *)kmalloc(sizeof(*p), GFP_KERNEL); |
450 | if (!q) { |
451 | if (p) p->refcount++; |
452 | return -ENOMEM; |
453 | } |
454 | memset(q, 0, sizeof(*q)); |
455 | q->refcount=1; |
456 | *vc->vc_uni_pagedir_loc = (unsigned long)q; |
457 | } else { |
458 | if (p == dflt) dflt = NULL; |
459 | p->refcount++; |
460 | p->sum = 0; |
461 | con_release_unimap(p); |
462 | } |
463 | return 0; |
464 | } |
465 | |
466 | int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) |
467 | { |
468 | int err = 0, err1, i; |
469 | struct uni_pagedir *p, *q; |
470 | |
471 | p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
472 | if (p->readonly) return -EIO; |
473 | |
474 | if (!ct) return 0; |
475 | |
476 | if (p->refcount > 1) { |
477 | int j, k; |
478 | u16 **p1, *p2, l; |
479 | |
480 | err1 = con_clear_unimap(vc, NULL); |
481 | if (err1) return err1; |
482 | |
483 | q = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
484 | for (i = 0, l = 0; i < 32; i++) |
485 | if ((p1 = p->uni_pgdir[i])) |
486 | for (j = 0; j < 32; j++) |
487 | if ((p2 = p1[j])) |
488 | for (k = 0; k < 64; k++, l++) |
489 | if (p2[k] != 0xffff) { |
490 | err1 = con_insert_unipair(q, l, p2[k]); |
491 | if (err1) { |
492 | p->refcount++; |
493 | *vc->vc_uni_pagedir_loc = (unsigned long)p; |
494 | con_release_unimap(q); |
495 | kfree(q); |
496 | return err1; |
497 | } |
498 | } |
499 | p = q; |
500 | } else if (p == dflt) |
501 | dflt = NULL; |
502 | |
503 | while (ct--) { |
504 | unsigned short unicode, fontpos; |
505 | __get_user(unicode, &list->unicode); |
506 | __get_user(fontpos, &list->fontpos); |
507 | if ((err1 = con_insert_unipair(p, unicode,fontpos)) != 0) |
508 | err = err1; |
509 | list++; |
510 | } |
511 | |
512 | if (con_unify_unimap(vc, p)) |
513 | return err; |
514 | |
515 | for (i = 0; i <= 3; i++) |
516 | set_inverse_transl(vc, p, i); /* Update all inverse translations */ |
517 | |
518 | return err; |
519 | } |
520 | |
521 | /* Loads the unimap for the hardware font, as defined in uni_hash.tbl. |
522 | The representation used was the most compact I could come up |
523 | with. This routine is executed at sys_setup time, and when the |
524 | PIO_FONTRESET ioctl is called. */ |
525 | |
526 | int con_set_default_unimap(struct vc_data *vc) |
527 | { |
528 | int i, j, err = 0, err1; |
529 | u16 *q; |
530 | struct uni_pagedir *p; |
531 | |
532 | if (dflt) { |
533 | p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
534 | if (p == dflt) |
535 | return 0; |
536 | dflt->refcount++; |
537 | *vc->vc_uni_pagedir_loc = (unsigned long)dflt; |
538 | if (p && --p->refcount) { |
539 | con_release_unimap(p); |
540 | kfree(p); |
541 | } |
542 | return 0; |
543 | } |
544 | |
545 | /* The default font is always 256 characters */ |
546 | |
547 | err = con_clear_unimap(vc, NULL); |
548 | if (err) return err; |
549 | |
550 | p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
551 | q = dfont_unitable; |
552 | |
553 | for (i = 0; i < 256; i++) |
554 | for (j = dfont_unicount[i]; j; j--) { |
555 | err1 = con_insert_unipair(p, *(q++), i); |
556 | if (err1) |
557 | err = err1; |
558 | } |
559 | |
560 | if (con_unify_unimap(vc, p)) { |
561 | dflt = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
562 | return err; |
563 | } |
564 | |
565 | for (i = 0; i <= 3; i++) |
566 | set_inverse_transl(vc, p, i); /* Update all inverse translations */ |
567 | dflt = p; |
568 | return err; |
569 | } |
570 | EXPORT_SYMBOL(con_set_default_unimap); |
571 | |
572 | int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc) |
573 | { |
574 | struct uni_pagedir *q; |
575 | |
576 | if (!*src_vc->vc_uni_pagedir_loc) |
577 | return -EINVAL; |
578 | if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc) |
579 | return 0; |
580 | con_free_unimap(dst_vc); |
581 | q = (struct uni_pagedir *)*src_vc->vc_uni_pagedir_loc; |
582 | q->refcount++; |
583 | *dst_vc->vc_uni_pagedir_loc = (long)q; |
584 | return 0; |
585 | } |
586 | |
587 | int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list) |
588 | { |
589 | int i, j, k, ect; |
590 | u16 **p1, *p2; |
591 | struct uni_pagedir *p; |
592 | |
593 | ect = 0; |
594 | if (*vc->vc_uni_pagedir_loc) { |
595 | p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
596 | for (i = 0; i < 32; i++) |
597 | if ((p1 = p->uni_pgdir[i])) |
598 | for (j = 0; j < 32; j++) |
599 | if ((p2 = *(p1++))) |
600 | for (k = 0; k < 64; k++) { |
601 | if (*p2 < MAX_GLYPH && ect++ < ct) { |
602 | __put_user((u_short)((i<<11)+(j<<6)+k), |
603 | &list->unicode); |
604 | __put_user((u_short) *p2, |
605 | &list->fontpos); |
606 | list++; |
607 | } |
608 | p2++; |
609 | } |
610 | } |
611 | __put_user(ect, uct); |
612 | return ((ect <= ct) ? 0 : -ENOMEM); |
613 | } |
614 | |
615 | void con_protect_unimap(struct vc_data *vc, int rdonly) |
616 | { |
617 | struct uni_pagedir *p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc; |
618 | |
619 | if (p) |
620 | p->readonly = rdonly; |
621 | } |
622 | |
623 | int |
624 | conv_uni_to_pc(struct vc_data *conp, long ucs) |
625 | { |
626 | int h; |
627 | u16 **p1, *p2; |
628 | struct uni_pagedir *p; |
629 | |
630 | /* Only 16-bit codes supported at this time */ |
631 | if (ucs > 0xffff) |
632 | ucs = 0xfffd; /* U+FFFD: REPLACEMENT CHARACTER */ |
633 | else if (ucs < 0x20 || ucs >= 0xfffe) |
634 | return -1; /* Not a printable character */ |
635 | else if (ucs == 0xfeff || (ucs >= 0x200a && ucs <= 0x200f)) |
636 | return -2; /* Zero-width space */ |
637 | /* |
638 | * UNI_DIRECT_BASE indicates the start of the region in the User Zone |
639 | * which always has a 1:1 mapping to the currently loaded font. The |
640 | * UNI_DIRECT_MASK indicates the bit span of the region. |
641 | */ |
642 | else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE) |
643 | return ucs & UNI_DIRECT_MASK; |
644 | |
645 | if (!*conp->vc_uni_pagedir_loc) |
646 | return -3; |
647 | |
648 | p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc; |
649 | if ((p1 = p->uni_pgdir[ucs >> 11]) && |
650 | (p2 = p1[(ucs >> 6) & 0x1f]) && |
651 | (h = p2[ucs & 0x3f]) < MAX_GLYPH) |
652 | return h; |
653 | |
654 | return -4; /* not found */ |
655 | } |
656 | |
657 | /* |
658 | * This is called at sys_setup time, after memory and the console are |
659 | * initialized. It must be possible to call kmalloc(..., GFP_KERNEL) |
660 | * from this function, hence the call from sys_setup. |
661 | */ |
662 | void __init |
663 | console_map_init(void) |
664 | { |
665 | int i; |
666 | |
667 | for (i = 0; i < MAX_NR_CONSOLES; i++) |
668 | if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc) |
669 | con_set_default_unimap(vc_cons[i].d); |
670 | } |
671 | |
672 | EXPORT_SYMBOL(con_copy_unimap); |