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e3b3d0f5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * consolemap.c | |
4 | * | |
5 | * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code) | |
6 | * to font positions. | |
7 | * | |
8 | * aeb, 950210 | |
9 | * | |
10 | * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998 | |
11 | * | |
12 | * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998 | |
7edd7e82 WL |
13 | * |
14 | * In order to prevent the following circular lock dependency: | |
15 | * &mm->mmap_sem --> cpu_hotplug.lock --> console_lock --> &mm->mmap_sem | |
16 | * | |
17 | * We cannot allow page fault to happen while holding the console_lock. | |
18 | * Therefore, all the userspace copy operations have to be done outside | |
19 | * the console_lock critical sections. | |
20 | * | |
21 | * As all the affected functions are all called directly from vt_ioctl(), we | |
22 | * can allocate some small buffers directly on stack without worrying about | |
23 | * stack overflow. | |
1da177e4 LT |
24 | */ |
25 | ||
1da177e4 LT |
26 | #include <linux/module.h> |
27 | #include <linux/kd.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/tty.h> | |
7c0f6ba6 | 33 | #include <linux/uaccess.h> |
5d1a33fa | 34 | #include <linux/console.h> |
1da177e4 LT |
35 | #include <linux/consolemap.h> |
36 | #include <linux/vt_kern.h> | |
7edd7e82 | 37 | #include <linux/string.h> |
1da177e4 LT |
38 | |
39 | static unsigned short translations[][256] = { | |
40 | /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */ | |
41 | { | |
42 | 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, | |
43 | 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, | |
44 | 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, | |
45 | 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, | |
46 | 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, | |
47 | 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, | |
48 | 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, | |
49 | 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, | |
50 | 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, | |
51 | 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, | |
52 | 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, | |
53 | 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, | |
54 | 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, | |
55 | 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, | |
56 | 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, | |
57 | 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f, | |
58 | 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, | |
59 | 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, | |
60 | 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, | |
61 | 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, | |
62 | 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, | |
63 | 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, | |
64 | 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, | |
65 | 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, | |
66 | 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, | |
67 | 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, | |
68 | 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, | |
69 | 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, | |
70 | 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, | |
71 | 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, | |
72 | 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, | |
73 | 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff | |
74 | }, | |
75 | /* VT100 graphics mapped to Unicode */ | |
76 | { | |
77 | 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, | |
78 | 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, | |
79 | 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, | |
80 | 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, | |
81 | 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, | |
82 | 0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f, | |
83 | 0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, | |
84 | 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, | |
85 | 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, | |
86 | 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, | |
87 | 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, | |
88 | 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0, | |
89 | 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1, | |
90 | 0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba, | |
91 | 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c, | |
92 | 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f, | |
93 | 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, | |
94 | 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, | |
95 | 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, | |
96 | 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, | |
97 | 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, | |
98 | 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, | |
99 | 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, | |
100 | 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, | |
101 | 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, | |
102 | 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, | |
103 | 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, | |
104 | 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, | |
105 | 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, | |
106 | 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, | |
107 | 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, | |
108 | 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff | |
109 | }, | |
110 | /* IBM Codepage 437 mapped to Unicode */ | |
111 | { | |
112 | 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022, | |
113 | 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c, | |
114 | 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8, | |
115 | 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc, | |
116 | 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, | |
117 | 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, | |
118 | 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, | |
119 | 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, | |
120 | 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, | |
121 | 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, | |
122 | 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, | |
123 | 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, | |
124 | 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, | |
125 | 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, | |
126 | 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, | |
127 | 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302, | |
128 | 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7, | |
129 | 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5, | |
130 | 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9, | |
131 | 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192, | |
132 | 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba, | |
133 | 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb, | |
134 | 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, | |
135 | 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510, | |
136 | 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f, | |
137 | 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567, | |
138 | 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b, | |
139 | 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580, | |
140 | 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4, | |
141 | 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229, | |
142 | 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248, | |
143 | 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0 | |
144 | }, | |
145 | /* User mapping -- default to codes for direct font mapping */ | |
146 | { | |
147 | 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007, | |
148 | 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f, | |
149 | 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017, | |
150 | 0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f, | |
151 | 0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027, | |
152 | 0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f, | |
153 | 0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037, | |
154 | 0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f, | |
155 | 0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047, | |
156 | 0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f, | |
157 | 0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057, | |
158 | 0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f, | |
159 | 0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067, | |
160 | 0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f, | |
161 | 0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077, | |
162 | 0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f, | |
163 | 0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087, | |
164 | 0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f, | |
165 | 0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097, | |
166 | 0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f, | |
167 | 0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7, | |
168 | 0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af, | |
169 | 0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7, | |
170 | 0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf, | |
171 | 0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7, | |
172 | 0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf, | |
173 | 0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7, | |
174 | 0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df, | |
175 | 0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7, | |
176 | 0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef, | |
177 | 0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7, | |
178 | 0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff | |
179 | } | |
180 | }; | |
181 | ||
182 | /* The standard kernel character-to-font mappings are not invertible | |
183 | -- this is just a best effort. */ | |
184 | ||
185 | #define MAX_GLYPH 512 /* Max possible glyph value */ | |
186 | ||
187 | static int inv_translate[MAX_NR_CONSOLES]; | |
188 | ||
189 | struct uni_pagedir { | |
190 | u16 **uni_pgdir[32]; | |
191 | unsigned long refcount; | |
192 | unsigned long sum; | |
193 | unsigned char *inverse_translations[4]; | |
759448f4 | 194 | u16 *inverse_trans_unicode; |
1da177e4 LT |
195 | }; |
196 | ||
197 | static struct uni_pagedir *dflt; | |
198 | ||
199 | static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i) | |
200 | { | |
201 | int j, glyph; | |
202 | unsigned short *t = translations[i]; | |
203 | unsigned char *q; | |
204 | ||
205 | if (!p) return; | |
206 | q = p->inverse_translations[i]; | |
207 | ||
208 | if (!q) { | |
8358f624 | 209 | q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL); |
1da177e4 LT |
210 | if (!q) return; |
211 | } | |
212 | memset(q, 0, MAX_GLYPH); | |
213 | ||
214 | for (j = 0; j < E_TABSZ; j++) { | |
215 | glyph = conv_uni_to_pc(conp, t[j]); | |
216 | if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) { | |
217 | /* prefer '-' above SHY etc. */ | |
218 | q[glyph] = j; | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
759448f4 JE |
223 | static void set_inverse_trans_unicode(struct vc_data *conp, |
224 | struct uni_pagedir *p) | |
225 | { | |
226 | int i, j, k, glyph; | |
227 | u16 **p1, *p2; | |
228 | u16 *q; | |
229 | ||
230 | if (!p) return; | |
231 | q = p->inverse_trans_unicode; | |
232 | if (!q) { | |
233 | q = p->inverse_trans_unicode = | |
234 | kmalloc(MAX_GLYPH * sizeof(u16), GFP_KERNEL); | |
235 | if (!q) | |
236 | return; | |
237 | } | |
238 | memset(q, 0, MAX_GLYPH * sizeof(u16)); | |
239 | ||
240 | for (i = 0; i < 32; i++) { | |
241 | p1 = p->uni_pgdir[i]; | |
242 | if (!p1) | |
243 | continue; | |
244 | for (j = 0; j < 32; j++) { | |
245 | p2 = p1[j]; | |
246 | if (!p2) | |
247 | continue; | |
248 | for (k = 0; k < 64; k++) { | |
249 | glyph = p2[k]; | |
250 | if (glyph >= 0 && glyph < MAX_GLYPH | |
251 | && q[glyph] < 32) | |
252 | q[glyph] = (i << 11) + (j << 6) + k; | |
253 | } | |
254 | } | |
255 | } | |
256 | } | |
257 | ||
1da177e4 LT |
258 | unsigned short *set_translate(int m, struct vc_data *vc) |
259 | { | |
260 | inv_translate[vc->vc_num] = m; | |
261 | return translations[m]; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Inverse translation is impossible for several reasons: | |
266 | * 1. The font<->character maps are not 1-1. | |
267 | * 2. The text may have been written while a different translation map | |
759448f4 | 268 | * was active. |
1da177e4 LT |
269 | * Still, it is now possible to a certain extent to cut and paste non-ASCII. |
270 | */ | |
759448f4 | 271 | u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode) |
1da177e4 LT |
272 | { |
273 | struct uni_pagedir *p; | |
759448f4 | 274 | int m; |
1da177e4 LT |
275 | if (glyph < 0 || glyph >= MAX_GLYPH) |
276 | return 0; | |
6d4e751e GKH |
277 | else { |
278 | p = *conp->vc_uni_pagedir_loc; | |
279 | if (!p) | |
759448f4 | 280 | return glyph; |
6d4e751e GKH |
281 | else if (use_unicode) { |
282 | if (!p->inverse_trans_unicode) | |
283 | return glyph; | |
284 | else | |
285 | return p->inverse_trans_unicode[glyph]; | |
286 | } else { | |
287 | m = inv_translate[conp->vc_num]; | |
288 | if (!p->inverse_translations[m]) | |
289 | return glyph; | |
290 | else | |
291 | return p->inverse_translations[m][glyph]; | |
292 | } | |
759448f4 | 293 | } |
1da177e4 | 294 | } |
f7511d5f | 295 | EXPORT_SYMBOL_GPL(inverse_translate); |
1da177e4 LT |
296 | |
297 | static void update_user_maps(void) | |
298 | { | |
299 | int i; | |
300 | struct uni_pagedir *p, *q = NULL; | |
301 | ||
302 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
303 | if (!vc_cons_allocated(i)) | |
304 | continue; | |
e4bdab70 | 305 | p = *vc_cons[i].d->vc_uni_pagedir_loc; |
1da177e4 LT |
306 | if (p && p != q) { |
307 | set_inverse_transl(vc_cons[i].d, p, USER_MAP); | |
759448f4 | 308 | set_inverse_trans_unicode(vc_cons[i].d, p); |
1da177e4 LT |
309 | q = p; |
310 | } | |
311 | } | |
312 | } | |
313 | ||
314 | /* | |
315 | * Load customizable translation table | |
316 | * arg points to a 256 byte translation table. | |
317 | * | |
318 | * The "old" variants are for translation directly to font (using the | |
319 | * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set | |
320 | * Unicodes explicitly. | |
321 | */ | |
322 | int con_set_trans_old(unsigned char __user * arg) | |
323 | { | |
324 | int i; | |
7edd7e82 | 325 | unsigned short inbuf[E_TABSZ]; |
cc1e66f9 | 326 | unsigned char ubuf[E_TABSZ]; |
1da177e4 | 327 | |
cc1e66f9 | 328 | if (copy_from_user(ubuf, arg, E_TABSZ)) |
1da177e4 LT |
329 | return -EFAULT; |
330 | ||
cc1e66f9 AB |
331 | for (i = 0; i < E_TABSZ ; i++) |
332 | inbuf[i] = UNI_DIRECT_BASE | ubuf[i]; | |
1da177e4 | 333 | |
7edd7e82 WL |
334 | console_lock(); |
335 | memcpy(translations[USER_MAP], inbuf, sizeof(inbuf)); | |
1da177e4 | 336 | update_user_maps(); |
5d1a33fa | 337 | console_unlock(); |
1da177e4 LT |
338 | return 0; |
339 | } | |
340 | ||
341 | int con_get_trans_old(unsigned char __user * arg) | |
342 | { | |
343 | int i, ch; | |
344 | unsigned short *p = translations[USER_MAP]; | |
7edd7e82 | 345 | unsigned char outbuf[E_TABSZ]; |
1da177e4 | 346 | |
5d1a33fa | 347 | console_lock(); |
7edd7e82 | 348 | for (i = 0; i < E_TABSZ ; i++) |
5d1a33fa AC |
349 | { |
350 | ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]); | |
7edd7e82 | 351 | outbuf[i] = (ch & ~0xff) ? 0 : ch; |
5d1a33fa AC |
352 | } |
353 | console_unlock(); | |
7edd7e82 | 354 | |
cc1e66f9 | 355 | return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0; |
1da177e4 LT |
356 | } |
357 | ||
358 | int con_set_trans_new(ushort __user * arg) | |
359 | { | |
7edd7e82 | 360 | unsigned short inbuf[E_TABSZ]; |
1da177e4 | 361 | |
cc1e66f9 | 362 | if (copy_from_user(inbuf, arg, sizeof(inbuf))) |
1da177e4 LT |
363 | return -EFAULT; |
364 | ||
7edd7e82 WL |
365 | console_lock(); |
366 | memcpy(translations[USER_MAP], inbuf, sizeof(inbuf)); | |
1da177e4 | 367 | update_user_maps(); |
5d1a33fa | 368 | console_unlock(); |
1da177e4 LT |
369 | return 0; |
370 | } | |
371 | ||
372 | int con_get_trans_new(ushort __user * arg) | |
373 | { | |
7edd7e82 | 374 | unsigned short outbuf[E_TABSZ]; |
1da177e4 | 375 | |
5d1a33fa | 376 | console_lock(); |
7edd7e82 | 377 | memcpy(outbuf, translations[USER_MAP], sizeof(outbuf)); |
5d1a33fa | 378 | console_unlock(); |
7edd7e82 | 379 | |
cc1e66f9 | 380 | return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0; |
1da177e4 LT |
381 | } |
382 | ||
383 | /* | |
384 | * Unicode -> current font conversion | |
385 | * | |
386 | * A font has at most 512 chars, usually 256. | |
387 | * But one font position may represent several Unicode chars. | |
388 | * A hashtable is somewhat of a pain to deal with, so use a | |
389 | * "paged table" instead. Simulation has shown the memory cost of | |
390 | * this 3-level paged table scheme to be comparable to a hash table. | |
391 | */ | |
392 | ||
393 | extern u8 dfont_unicount[]; /* Defined in console_defmap.c */ | |
394 | extern u16 dfont_unitable[]; | |
395 | ||
396 | static void con_release_unimap(struct uni_pagedir *p) | |
397 | { | |
398 | u16 **p1; | |
399 | int i, j; | |
400 | ||
401 | if (p == dflt) dflt = NULL; | |
402 | for (i = 0; i < 32; i++) { | |
6d4e751e GKH |
403 | p1 = p->uni_pgdir[i]; |
404 | if (p1 != NULL) { | |
1da177e4 | 405 | for (j = 0; j < 32; j++) |
735d5661 | 406 | kfree(p1[j]); |
1da177e4 LT |
407 | kfree(p1); |
408 | } | |
409 | p->uni_pgdir[i] = NULL; | |
410 | } | |
735d5661 JJ |
411 | for (i = 0; i < 4; i++) { |
412 | kfree(p->inverse_translations[i]); | |
413 | p->inverse_translations[i] = NULL; | |
414 | } | |
daa74a25 SK |
415 | kfree(p->inverse_trans_unicode); |
416 | p->inverse_trans_unicode = NULL; | |
1da177e4 LT |
417 | } |
418 | ||
5d1a33fa | 419 | /* Caller must hold the console lock */ |
1da177e4 LT |
420 | void con_free_unimap(struct vc_data *vc) |
421 | { | |
422 | struct uni_pagedir *p; | |
423 | ||
e4bdab70 | 424 | p = *vc->vc_uni_pagedir_loc; |
1da177e4 LT |
425 | if (!p) |
426 | return; | |
e4bdab70 | 427 | *vc->vc_uni_pagedir_loc = NULL; |
1da177e4 LT |
428 | if (--p->refcount) |
429 | return; | |
430 | con_release_unimap(p); | |
431 | kfree(p); | |
432 | } | |
433 | ||
434 | static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p) | |
435 | { | |
436 | int i, j, k; | |
437 | struct uni_pagedir *q; | |
438 | ||
439 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
440 | if (!vc_cons_allocated(i)) | |
441 | continue; | |
e4bdab70 | 442 | q = *vc_cons[i].d->vc_uni_pagedir_loc; |
1da177e4 LT |
443 | if (!q || q == p || q->sum != p->sum) |
444 | continue; | |
445 | for (j = 0; j < 32; j++) { | |
446 | u16 **p1, **q1; | |
447 | p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j]; | |
448 | if (!p1 && !q1) | |
449 | continue; | |
450 | if (!p1 || !q1) | |
451 | break; | |
452 | for (k = 0; k < 32; k++) { | |
453 | if (!p1[k] && !q1[k]) | |
454 | continue; | |
455 | if (!p1[k] || !q1[k]) | |
456 | break; | |
457 | if (memcmp(p1[k], q1[k], 64*sizeof(u16))) | |
458 | break; | |
459 | } | |
460 | if (k < 32) | |
461 | break; | |
462 | } | |
463 | if (j == 32) { | |
464 | q->refcount++; | |
e4bdab70 | 465 | *conp->vc_uni_pagedir_loc = q; |
1da177e4 LT |
466 | con_release_unimap(p); |
467 | kfree(p); | |
468 | return 1; | |
469 | } | |
470 | } | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static int | |
475 | con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos) | |
476 | { | |
477 | int i, n; | |
478 | u16 **p1, *p2; | |
479 | ||
6d4e751e GKH |
480 | p1 = p->uni_pgdir[n = unicode >> 11]; |
481 | if (!p1) { | |
1da177e4 LT |
482 | p1 = p->uni_pgdir[n] = kmalloc(32*sizeof(u16 *), GFP_KERNEL); |
483 | if (!p1) return -ENOMEM; | |
484 | for (i = 0; i < 32; i++) | |
485 | p1[i] = NULL; | |
486 | } | |
487 | ||
6d4e751e GKH |
488 | p2 = p1[n = (unicode >> 6) & 0x1f]; |
489 | if (!p2) { | |
1da177e4 LT |
490 | p2 = p1[n] = kmalloc(64*sizeof(u16), GFP_KERNEL); |
491 | if (!p2) return -ENOMEM; | |
492 | memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */ | |
493 | } | |
494 | ||
495 | p2[unicode & 0x3f] = fontpos; | |
496 | ||
497 | p->sum += (fontpos << 20) + unicode; | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
f8b0c2e6 JS |
502 | /* Caller must hold the lock */ |
503 | static int con_do_clear_unimap(struct vc_data *vc) | |
1da177e4 LT |
504 | { |
505 | struct uni_pagedir *p, *q; | |
5d1a33fa | 506 | |
e4bdab70 | 507 | p = *vc->vc_uni_pagedir_loc; |
1da177e4 | 508 | if (!p || --p->refcount) { |
392b7bc1 | 509 | q = kzalloc(sizeof(*p), GFP_KERNEL); |
1da177e4 | 510 | if (!q) { |
5d1a33fa AC |
511 | if (p) |
512 | p->refcount++; | |
1da177e4 LT |
513 | return -ENOMEM; |
514 | } | |
1da177e4 | 515 | q->refcount=1; |
e4bdab70 | 516 | *vc->vc_uni_pagedir_loc = q; |
1da177e4 LT |
517 | } else { |
518 | if (p == dflt) dflt = NULL; | |
519 | p->refcount++; | |
520 | p->sum = 0; | |
521 | con_release_unimap(p); | |
522 | } | |
523 | return 0; | |
524 | } | |
525 | ||
f8b0c2e6 | 526 | int con_clear_unimap(struct vc_data *vc) |
5d1a33fa AC |
527 | { |
528 | int ret; | |
529 | console_lock(); | |
f8b0c2e6 | 530 | ret = con_do_clear_unimap(vc); |
5d1a33fa AC |
531 | console_unlock(); |
532 | return ret; | |
533 | } | |
534 | ||
1da177e4 LT |
535 | int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list) |
536 | { | |
537 | int err = 0, err1, i; | |
538 | struct uni_pagedir *p, *q; | |
7edd7e82 | 539 | struct unipair *unilist, *plist; |
1da177e4 | 540 | |
91727b16 TI |
541 | if (!ct) |
542 | return 0; | |
543 | ||
4f1be1b5 AB |
544 | unilist = memdup_user(list, ct * sizeof(struct unipair)); |
545 | if (IS_ERR(unilist)) | |
546 | return PTR_ERR(unilist); | |
7edd7e82 | 547 | |
5d1a33fa AC |
548 | console_lock(); |
549 | ||
4a4c61b7 | 550 | /* Save original vc_unipagdir_loc in case we allocate a new one */ |
e4bdab70 | 551 | p = *vc->vc_uni_pagedir_loc; |
9e326f78 ID |
552 | |
553 | if (!p) { | |
554 | err = -EINVAL; | |
555 | ||
556 | goto out_unlock; | |
557 | } | |
1da177e4 LT |
558 | |
559 | if (p->refcount > 1) { | |
560 | int j, k; | |
561 | u16 **p1, *p2, l; | |
562 | ||
f8b0c2e6 | 563 | err1 = con_do_clear_unimap(vc); |
5d1a33fa | 564 | if (err1) { |
7edd7e82 WL |
565 | err = err1; |
566 | goto out_unlock; | |
5d1a33fa | 567 | } |
1da177e4 | 568 | |
4a4c61b7 LC |
569 | /* |
570 | * Since refcount was > 1, con_clear_unimap() allocated a | |
571 | * a new uni_pagedir for this vc. Re: p != q | |
572 | */ | |
e4bdab70 | 573 | q = *vc->vc_uni_pagedir_loc; |
4a4c61b7 LC |
574 | |
575 | /* | |
576 | * uni_pgdir is a 32*32*64 table with rows allocated | |
577 | * when its first entry is added. The unicode value must | |
578 | * still be incremented for empty rows. We are copying | |
579 | * entries from "p" (old) to "q" (new). | |
580 | */ | |
581 | l = 0; /* unicode value */ | |
6d4e751e GKH |
582 | for (i = 0; i < 32; i++) { |
583 | p1 = p->uni_pgdir[i]; | |
584 | if (p1) | |
585 | for (j = 0; j < 32; j++) { | |
586 | p2 = p1[j]; | |
587 | if (p2) { | |
1da177e4 LT |
588 | for (k = 0; k < 64; k++, l++) |
589 | if (p2[k] != 0xffff) { | |
4a4c61b7 LC |
590 | /* |
591 | * Found one, copy entry for unicode | |
592 | * l with fontpos value p2[k]. | |
593 | */ | |
1da177e4 LT |
594 | err1 = con_insert_unipair(q, l, p2[k]); |
595 | if (err1) { | |
596 | p->refcount++; | |
e4bdab70 | 597 | *vc->vc_uni_pagedir_loc = p; |
1da177e4 LT |
598 | con_release_unimap(q); |
599 | kfree(q); | |
7edd7e82 WL |
600 | err = err1; |
601 | goto out_unlock; | |
1da177e4 | 602 | } |
4a4c61b7 LC |
603 | } |
604 | } else { | |
605 | /* Account for row of 64 empty entries */ | |
606 | l += 64; | |
607 | } | |
6d4e751e | 608 | } |
4a4c61b7 LC |
609 | else |
610 | /* Account for empty table */ | |
611 | l += 32 * 64; | |
6d4e751e | 612 | } |
4a4c61b7 LC |
613 | |
614 | /* | |
615 | * Finished copying font table, set vc_uni_pagedir to new table | |
616 | */ | |
617 | p = q; | |
618 | } else if (p == dflt) { | |
1da177e4 | 619 | dflt = NULL; |
4a4c61b7 LC |
620 | } |
621 | ||
622 | /* | |
623 | * Insert user specified unicode pairs into new table. | |
624 | */ | |
7edd7e82 WL |
625 | for (plist = unilist; ct; ct--, plist++) { |
626 | err1 = con_insert_unipair(p, plist->unicode, plist->fontpos); | |
627 | if (err1) | |
1da177e4 | 628 | err = err1; |
1da177e4 LT |
629 | } |
630 | ||
4a4c61b7 LC |
631 | /* |
632 | * Merge with fontmaps of any other virtual consoles. | |
633 | */ | |
7edd7e82 WL |
634 | if (con_unify_unimap(vc, p)) |
635 | goto out_unlock; | |
1da177e4 LT |
636 | |
637 | for (i = 0; i <= 3; i++) | |
4a4c61b7 | 638 | set_inverse_transl(vc, p, i); /* Update inverse translations */ |
759448f4 | 639 | set_inverse_trans_unicode(vc, p); |
5d1a33fa | 640 | |
9e326f78 | 641 | out_unlock: |
5d1a33fa | 642 | console_unlock(); |
7edd7e82 | 643 | kfree(unilist); |
1da177e4 LT |
644 | return err; |
645 | } | |
646 | ||
5d1a33fa AC |
647 | /** |
648 | * con_set_default_unimap - set default unicode map | |
649 | * @vc: the console we are updating | |
650 | * | |
651 | * Loads the unimap for the hardware font, as defined in uni_hash.tbl. | |
652 | * The representation used was the most compact I could come up | |
653 | * with. This routine is executed at video setup, and when the | |
654 | * PIO_FONTRESET ioctl is called. | |
655 | * | |
656 | * The caller must hold the console lock | |
657 | */ | |
1da177e4 LT |
658 | int con_set_default_unimap(struct vc_data *vc) |
659 | { | |
660 | int i, j, err = 0, err1; | |
661 | u16 *q; | |
662 | struct uni_pagedir *p; | |
663 | ||
664 | if (dflt) { | |
e4bdab70 | 665 | p = *vc->vc_uni_pagedir_loc; |
1da177e4 LT |
666 | if (p == dflt) |
667 | return 0; | |
5d1a33fa | 668 | |
1da177e4 | 669 | dflt->refcount++; |
e4bdab70 | 670 | *vc->vc_uni_pagedir_loc = dflt; |
106b5fa7 | 671 | if (p && !--p->refcount) { |
1da177e4 LT |
672 | con_release_unimap(p); |
673 | kfree(p); | |
674 | } | |
675 | return 0; | |
676 | } | |
677 | ||
678 | /* The default font is always 256 characters */ | |
679 | ||
f8b0c2e6 | 680 | err = con_do_clear_unimap(vc); |
5d1a33fa AC |
681 | if (err) |
682 | return err; | |
1da177e4 | 683 | |
e4bdab70 | 684 | p = *vc->vc_uni_pagedir_loc; |
1da177e4 LT |
685 | q = dfont_unitable; |
686 | ||
687 | for (i = 0; i < 256; i++) | |
688 | for (j = dfont_unicount[i]; j; j--) { | |
689 | err1 = con_insert_unipair(p, *(q++), i); | |
690 | if (err1) | |
691 | err = err1; | |
692 | } | |
693 | ||
694 | if (con_unify_unimap(vc, p)) { | |
e4bdab70 | 695 | dflt = *vc->vc_uni_pagedir_loc; |
1da177e4 LT |
696 | return err; |
697 | } | |
698 | ||
699 | for (i = 0; i <= 3; i++) | |
700 | set_inverse_transl(vc, p, i); /* Update all inverse translations */ | |
759448f4 | 701 | set_inverse_trans_unicode(vc, p); |
1da177e4 LT |
702 | dflt = p; |
703 | return err; | |
704 | } | |
705 | EXPORT_SYMBOL(con_set_default_unimap); | |
706 | ||
5d1a33fa AC |
707 | /** |
708 | * con_copy_unimap - copy unimap between two vts | |
709 | * @dst_vc: target | |
710 | * @src_vt: source | |
711 | * | |
712 | * The caller must hold the console lock when invoking this method | |
713 | */ | |
1da177e4 LT |
714 | int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc) |
715 | { | |
716 | struct uni_pagedir *q; | |
717 | ||
718 | if (!*src_vc->vc_uni_pagedir_loc) | |
719 | return -EINVAL; | |
720 | if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc) | |
721 | return 0; | |
722 | con_free_unimap(dst_vc); | |
e4bdab70 | 723 | q = *src_vc->vc_uni_pagedir_loc; |
1da177e4 | 724 | q->refcount++; |
e4bdab70 | 725 | *dst_vc->vc_uni_pagedir_loc = q; |
1da177e4 LT |
726 | return 0; |
727 | } | |
5d1a33fa | 728 | EXPORT_SYMBOL(con_copy_unimap); |
1da177e4 | 729 | |
5d1a33fa AC |
730 | /** |
731 | * con_get_unimap - get the unicode map | |
732 | * @vc: the console to read from | |
733 | * | |
734 | * Read the console unicode data for this console. Called from the ioctl | |
735 | * handlers. | |
736 | */ | |
1da177e4 LT |
737 | int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list) |
738 | { | |
915f0a8d | 739 | int i, j, k, ret = 0; |
7edd7e82 | 740 | ushort ect; |
1da177e4 LT |
741 | u16 **p1, *p2; |
742 | struct uni_pagedir *p; | |
915f0a8d | 743 | struct unipair *unilist; |
7edd7e82 WL |
744 | |
745 | unilist = kmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL); | |
746 | if (!unilist) | |
747 | return -ENOMEM; | |
1da177e4 | 748 | |
5d1a33fa AC |
749 | console_lock(); |
750 | ||
1da177e4 LT |
751 | ect = 0; |
752 | if (*vc->vc_uni_pagedir_loc) { | |
e4bdab70 | 753 | p = *vc->vc_uni_pagedir_loc; |
6d4e751e GKH |
754 | for (i = 0; i < 32; i++) { |
755 | p1 = p->uni_pgdir[i]; | |
756 | if (p1) | |
757 | for (j = 0; j < 32; j++) { | |
758 | p2 = *(p1++); | |
759 | if (p2) | |
7edd7e82 WL |
760 | for (k = 0; k < 64; k++, p2++) { |
761 | if (*p2 >= MAX_GLYPH) | |
762 | continue; | |
763 | if (ect < ct) { | |
764 | unilist[ect].unicode = | |
765 | (i<<11)+(j<<6)+k; | |
766 | unilist[ect].fontpos = *p2; | |
1da177e4 | 767 | } |
7edd7e82 | 768 | ect++; |
1da177e4 | 769 | } |
6d4e751e GKH |
770 | } |
771 | } | |
1da177e4 | 772 | } |
5d1a33fa | 773 | console_unlock(); |
915f0a8d AB |
774 | if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair))) |
775 | ret = -EFAULT; | |
776 | put_user(ect, uct); | |
7edd7e82 | 777 | kfree(unilist); |
915f0a8d | 778 | return ret ? ret : (ect <= ct) ? 0 : -ENOMEM; |
1da177e4 LT |
779 | } |
780 | ||
04c71976 ST |
781 | /* |
782 | * Always use USER_MAP. These functions are used by the keyboard, | |
783 | * which shouldn't be affected by G0/G1 switching, etc. | |
784 | * If the user map still contains default values, i.e. the | |
785 | * direct-to-font mapping, then assume user is using Latin1. | |
5d1a33fa AC |
786 | * |
787 | * FIXME: at some point we need to decide if we want to lock the table | |
788 | * update element itself via the keyboard_event_lock for consistency with the | |
789 | * keyboard driver as well as the consoles | |
04c71976 | 790 | */ |
759448f4 JE |
791 | /* may be called during an interrupt */ |
792 | u32 conv_8bit_to_uni(unsigned char c) | |
793 | { | |
759448f4 JE |
794 | unsigned short uni = translations[USER_MAP][c]; |
795 | return uni == (0xf000 | c) ? c : uni; | |
796 | } | |
797 | ||
04c71976 ST |
798 | int conv_uni_to_8bit(u32 uni) |
799 | { | |
800 | int c; | |
801 | for (c = 0; c < 0x100; c++) | |
802 | if (translations[USER_MAP][c] == uni || | |
803 | (translations[USER_MAP][c] == (c | 0xf000) && uni == c)) | |
804 | return c; | |
805 | return -1; | |
806 | } | |
807 | ||
1da177e4 LT |
808 | int |
809 | conv_uni_to_pc(struct vc_data *conp, long ucs) | |
810 | { | |
811 | int h; | |
812 | u16 **p1, *p2; | |
813 | struct uni_pagedir *p; | |
814 | ||
815 | /* Only 16-bit codes supported at this time */ | |
816 | if (ucs > 0xffff) | |
2f1a2ccb EK |
817 | return -4; /* Not found */ |
818 | else if (ucs < 0x20) | |
1da177e4 | 819 | return -1; /* Not a printable character */ |
2f1a2ccb | 820 | else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f)) |
1da177e4 LT |
821 | return -2; /* Zero-width space */ |
822 | /* | |
823 | * UNI_DIRECT_BASE indicates the start of the region in the User Zone | |
824 | * which always has a 1:1 mapping to the currently loaded font. The | |
825 | * UNI_DIRECT_MASK indicates the bit span of the region. | |
826 | */ | |
827 | else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE) | |
828 | return ucs & UNI_DIRECT_MASK; | |
829 | ||
830 | if (!*conp->vc_uni_pagedir_loc) | |
831 | return -3; | |
832 | ||
e4bdab70 | 833 | p = *conp->vc_uni_pagedir_loc; |
1da177e4 LT |
834 | if ((p1 = p->uni_pgdir[ucs >> 11]) && |
835 | (p2 = p1[(ucs >> 6) & 0x1f]) && | |
836 | (h = p2[ucs & 0x3f]) < MAX_GLYPH) | |
837 | return h; | |
838 | ||
839 | return -4; /* not found */ | |
840 | } | |
841 | ||
842 | /* | |
843 | * This is called at sys_setup time, after memory and the console are | |
844 | * initialized. It must be possible to call kmalloc(..., GFP_KERNEL) | |
845 | * from this function, hence the call from sys_setup. | |
846 | */ | |
847 | void __init | |
848 | console_map_init(void) | |
849 | { | |
850 | int i; | |
851 | ||
852 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
853 | if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc) | |
854 | con_set_default_unimap(vc_cons[i].d); | |
855 | } | |
856 |