1 // SPDX-License-Identifier: GPL-2.0
5 * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code)
10 * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998
12 * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998
14 * In order to prevent the following circular lock dependency:
15 * &mm->mmap_sem --> cpu_hotplug.lock --> console_lock --> &mm->mmap_sem
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.
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
26 #include <linux/module.h>
28 #include <linux/errno.h>
30 #include <linux/slab.h>
31 #include <linux/init.h>
32 #include <linux/tty.h>
33 #include <linux/uaccess.h>
34 #include <linux/console.h>
35 #include <linux/consolemap.h>
36 #include <linux/vt_kern.h>
37 #include <linux/string.h>
39 static unsigned short translations[][256] = {
40 /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
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
75 /* VT100 graphics mapped to Unicode */
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
110 /* IBM Codepage 437 mapped to Unicode */
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
145 /* User mapping -- default to codes for direct font mapping */
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
182 /* The standard kernel character-to-font mappings are not invertible
183 -- this is just a best effort. */
185 #define MAX_GLYPH 512 /* Max possible glyph value */
187 static int inv_translate[MAX_NR_CONSOLES];
191 unsigned long refcount;
193 unsigned char *inverse_translations[4];
194 u16 *inverse_trans_unicode;
197 static struct uni_pagedir *dflt;
199 static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i)
202 unsigned short *t = translations[i];
206 q = p->inverse_translations[i];
209 q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL);
212 memset(q, 0, MAX_GLYPH);
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. */
223 static void set_inverse_trans_unicode(struct vc_data *conp,
224 struct uni_pagedir *p)
231 q = p->inverse_trans_unicode;
233 q = p->inverse_trans_unicode =
234 kmalloc(MAX_GLYPH * sizeof(u16), GFP_KERNEL);
238 memset(q, 0, MAX_GLYPH * sizeof(u16));
240 for (i = 0; i < 32; i++) {
241 p1 = p->uni_pgdir[i];
244 for (j = 0; j < 32; j++) {
248 for (k = 0; k < 64; k++) {
250 if (glyph >= 0 && glyph < MAX_GLYPH
252 q[glyph] = (i << 11) + (j << 6) + k;
258 unsigned short *set_translate(int m, struct vc_data *vc)
260 inv_translate[vc->vc_num] = m;
261 return translations[m];
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
269 * Still, it is now possible to a certain extent to cut and paste non-ASCII.
271 u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode)
273 struct uni_pagedir *p;
275 if (glyph < 0 || glyph >= MAX_GLYPH)
278 p = *conp->vc_uni_pagedir_loc;
281 else if (use_unicode) {
282 if (!p->inverse_trans_unicode)
285 return p->inverse_trans_unicode[glyph];
287 m = inv_translate[conp->vc_num];
288 if (!p->inverse_translations[m])
291 return p->inverse_translations[m][glyph];
295 EXPORT_SYMBOL_GPL(inverse_translate);
297 static void update_user_maps(void)
300 struct uni_pagedir *p, *q = NULL;
302 for (i = 0; i < MAX_NR_CONSOLES; i++) {
303 if (!vc_cons_allocated(i))
305 p = *vc_cons[i].d->vc_uni_pagedir_loc;
307 set_inverse_transl(vc_cons[i].d, p, USER_MAP);
308 set_inverse_trans_unicode(vc_cons[i].d, p);
315 * Load customizable translation table
316 * arg points to a 256 byte translation table.
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.
322 int con_set_trans_old(unsigned char __user * arg)
325 unsigned short inbuf[E_TABSZ];
326 unsigned char ubuf[E_TABSZ];
328 if (copy_from_user(ubuf, arg, E_TABSZ))
331 for (i = 0; i < E_TABSZ ; i++)
332 inbuf[i] = UNI_DIRECT_BASE | ubuf[i];
335 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
341 int con_get_trans_old(unsigned char __user * arg)
344 unsigned short *p = translations[USER_MAP];
345 unsigned char outbuf[E_TABSZ];
348 for (i = 0; i < E_TABSZ ; i++)
350 ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
351 outbuf[i] = (ch & ~0xff) ? 0 : ch;
355 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
358 int con_set_trans_new(ushort __user * arg)
360 unsigned short inbuf[E_TABSZ];
362 if (copy_from_user(inbuf, arg, sizeof(inbuf)))
366 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
372 int con_get_trans_new(ushort __user * arg)
374 unsigned short outbuf[E_TABSZ];
377 memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
380 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
384 * Unicode -> current font conversion
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.
393 extern u8 dfont_unicount[]; /* Defined in console_defmap.c */
394 extern u16 dfont_unitable[];
396 static void con_release_unimap(struct uni_pagedir *p)
401 if (p == dflt) dflt = NULL;
402 for (i = 0; i < 32; i++) {
403 p1 = p->uni_pgdir[i];
405 for (j = 0; j < 32; j++)
409 p->uni_pgdir[i] = NULL;
411 for (i = 0; i < 4; i++) {
412 kfree(p->inverse_translations[i]);
413 p->inverse_translations[i] = NULL;
415 kfree(p->inverse_trans_unicode);
416 p->inverse_trans_unicode = NULL;
419 /* Caller must hold the console lock */
420 void con_free_unimap(struct vc_data *vc)
422 struct uni_pagedir *p;
424 p = *vc->vc_uni_pagedir_loc;
427 *vc->vc_uni_pagedir_loc = NULL;
430 con_release_unimap(p);
434 static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p)
437 struct uni_pagedir *q;
439 for (i = 0; i < MAX_NR_CONSOLES; i++) {
440 if (!vc_cons_allocated(i))
442 q = *vc_cons[i].d->vc_uni_pagedir_loc;
443 if (!q || q == p || q->sum != p->sum)
445 for (j = 0; j < 32; j++) {
447 p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j];
452 for (k = 0; k < 32; k++) {
453 if (!p1[k] && !q1[k])
455 if (!p1[k] || !q1[k])
457 if (memcmp(p1[k], q1[k], 64*sizeof(u16)))
465 *conp->vc_uni_pagedir_loc = q;
466 con_release_unimap(p);
475 con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
480 p1 = p->uni_pgdir[n = unicode >> 11];
482 p1 = p->uni_pgdir[n] = kmalloc(32*sizeof(u16 *), GFP_KERNEL);
483 if (!p1) return -ENOMEM;
484 for (i = 0; i < 32; i++)
488 p2 = p1[n = (unicode >> 6) & 0x1f];
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) */
495 p2[unicode & 0x3f] = fontpos;
497 p->sum += (fontpos << 20) + unicode;
502 /* Caller must hold the lock */
503 static int con_do_clear_unimap(struct vc_data *vc)
505 struct uni_pagedir *p, *q;
507 p = *vc->vc_uni_pagedir_loc;
508 if (!p || --p->refcount) {
509 q = kzalloc(sizeof(*p), GFP_KERNEL);
516 *vc->vc_uni_pagedir_loc = q;
518 if (p == dflt) dflt = NULL;
521 con_release_unimap(p);
526 int con_clear_unimap(struct vc_data *vc)
530 ret = con_do_clear_unimap(vc);
535 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
537 int err = 0, err1, i;
538 struct uni_pagedir *p, *q;
539 struct unipair *unilist, *plist;
544 unilist = memdup_user(list, ct * sizeof(struct unipair));
546 return PTR_ERR(unilist);
550 /* Save original vc_unipagdir_loc in case we allocate a new one */
551 p = *vc->vc_uni_pagedir_loc;
559 if (p->refcount > 1) {
563 err1 = con_do_clear_unimap(vc);
570 * Since refcount was > 1, con_clear_unimap() allocated a
571 * a new uni_pagedir for this vc. Re: p != q
573 q = *vc->vc_uni_pagedir_loc;
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).
581 l = 0; /* unicode value */
582 for (i = 0; i < 32; i++) {
583 p1 = p->uni_pgdir[i];
585 for (j = 0; j < 32; j++) {
588 for (k = 0; k < 64; k++, l++)
589 if (p2[k] != 0xffff) {
591 * Found one, copy entry for unicode
592 * l with fontpos value p2[k].
594 err1 = con_insert_unipair(q, l, p2[k]);
597 *vc->vc_uni_pagedir_loc = p;
598 con_release_unimap(q);
605 /* Account for row of 64 empty entries */
610 /* Account for empty table */
615 * Finished copying font table, set vc_uni_pagedir to new table
618 } else if (p == dflt) {
623 * Insert user specified unicode pairs into new table.
625 for (plist = unilist; ct; ct--, plist++) {
626 err1 = con_insert_unipair(p, plist->unicode, plist->fontpos);
632 * Merge with fontmaps of any other virtual consoles.
634 if (con_unify_unimap(vc, p))
637 for (i = 0; i <= 3; i++)
638 set_inverse_transl(vc, p, i); /* Update inverse translations */
639 set_inverse_trans_unicode(vc, p);
648 * con_set_default_unimap - set default unicode map
649 * @vc: the console we are updating
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.
656 * The caller must hold the console lock
658 int con_set_default_unimap(struct vc_data *vc)
660 int i, j, err = 0, err1;
662 struct uni_pagedir *p;
665 p = *vc->vc_uni_pagedir_loc;
670 *vc->vc_uni_pagedir_loc = dflt;
671 if (p && !--p->refcount) {
672 con_release_unimap(p);
678 /* The default font is always 256 characters */
680 err = con_do_clear_unimap(vc);
684 p = *vc->vc_uni_pagedir_loc;
687 for (i = 0; i < 256; i++)
688 for (j = dfont_unicount[i]; j; j--) {
689 err1 = con_insert_unipair(p, *(q++), i);
694 if (con_unify_unimap(vc, p)) {
695 dflt = *vc->vc_uni_pagedir_loc;
699 for (i = 0; i <= 3; i++)
700 set_inverse_transl(vc, p, i); /* Update all inverse translations */
701 set_inverse_trans_unicode(vc, p);
705 EXPORT_SYMBOL(con_set_default_unimap);
708 * con_copy_unimap - copy unimap between two vts
712 * The caller must hold the console lock when invoking this method
714 int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
716 struct uni_pagedir *q;
718 if (!*src_vc->vc_uni_pagedir_loc)
720 if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc)
722 con_free_unimap(dst_vc);
723 q = *src_vc->vc_uni_pagedir_loc;
725 *dst_vc->vc_uni_pagedir_loc = q;
728 EXPORT_SYMBOL(con_copy_unimap);
731 * con_get_unimap - get the unicode map
732 * @vc: the console to read from
734 * Read the console unicode data for this console. Called from the ioctl
737 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
739 int i, j, k, ret = 0;
742 struct uni_pagedir *p;
743 struct unipair *unilist;
745 unilist = kmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL);
752 if (*vc->vc_uni_pagedir_loc) {
753 p = *vc->vc_uni_pagedir_loc;
754 for (i = 0; i < 32; i++) {
755 p1 = p->uni_pgdir[i];
757 for (j = 0; j < 32; j++) {
760 for (k = 0; k < 64; k++, p2++) {
761 if (*p2 >= MAX_GLYPH)
764 unilist[ect].unicode =
766 unilist[ect].fontpos = *p2;
774 if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair)))
778 return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
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.
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
791 /* may be called during an interrupt */
792 u32 conv_8bit_to_uni(unsigned char c)
794 unsigned short uni = translations[USER_MAP][c];
795 return uni == (0xf000 | c) ? c : uni;
798 int conv_uni_to_8bit(u32 uni)
801 for (c = 0; c < 0x100; c++)
802 if (translations[USER_MAP][c] == uni ||
803 (translations[USER_MAP][c] == (c | 0xf000) && uni == c))
809 conv_uni_to_pc(struct vc_data *conp, long ucs)
813 struct uni_pagedir *p;
815 /* Only 16-bit codes supported at this time */
817 return -4; /* Not found */
819 return -1; /* Not a printable character */
820 else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f))
821 return -2; /* Zero-width space */
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.
827 else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
828 return ucs & UNI_DIRECT_MASK;
830 if (!*conp->vc_uni_pagedir_loc)
833 p = *conp->vc_uni_pagedir_loc;
834 if ((p1 = p->uni_pgdir[ucs >> 11]) &&
835 (p2 = p1[(ucs >> 6) & 0x1f]) &&
836 (h = p2[ucs & 0x3f]) < MAX_GLYPH)
839 return -4; /* not found */
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.
848 console_map_init(void)
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);