4 * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code)
13 * In order to prevent the following circular lock dependency:
14 * &mm->mmap_sem --> cpu_hotplug.lock --> console_lock --> &mm->mmap_sem
16 * We cannot allow page fault to happen while holding the console_lock.
17 * Therefore, all the userspace copy operations have to be done outside
18 * the console_lock critical sections.
20 * As all the affected functions are all called directly from vt_ioctl(), we
21 * can allocate some small buffers directly on stack without worrying about
25 #include <linux/module.h>
27 #include <linux/errno.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/tty.h>
32 #include <linux/uaccess.h>
33 #include <linux/console.h>
34 #include <linux/consolemap.h>
35 #include <linux/vt_kern.h>
36 #include <linux/string.h>
38 static unsigned short translations[][256] = {
39 /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
41 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
42 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
43 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
44 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
45 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
46 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
47 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
48 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
49 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
50 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
51 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
52 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
53 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
54 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
55 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
56 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
57 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
58 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
59 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
60 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
61 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
62 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
63 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
64 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
65 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
66 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
67 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
68 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
69 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
70 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
71 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
72 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
74 /* VT100 graphics mapped to Unicode */
76 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
77 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
78 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
79 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
80 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
81 0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f,
82 0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
83 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
84 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
85 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
86 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
87 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0,
88 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
89 0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
90 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
91 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f,
92 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
93 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
94 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
95 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
96 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
97 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
98 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
99 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
100 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
101 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
102 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
103 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
104 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
105 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
106 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
107 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
109 /* IBM Codepage 437 mapped to Unicode */
111 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
112 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
113 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8,
114 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc,
115 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
116 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
117 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
118 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
119 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
120 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
121 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
122 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
123 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
124 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
125 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
126 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
127 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
128 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
129 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
130 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
131 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
132 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
133 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
134 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
135 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
136 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
137 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
138 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
139 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
140 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
141 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
142 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
144 /* User mapping -- default to codes for direct font mapping */
146 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007,
147 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f,
148 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017,
149 0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
150 0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
151 0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f,
152 0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
153 0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f,
154 0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047,
155 0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f,
156 0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057,
157 0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f,
158 0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067,
159 0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f,
160 0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077,
161 0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f,
162 0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087,
163 0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f,
164 0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097,
165 0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f,
166 0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7,
167 0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af,
168 0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7,
169 0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf,
170 0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7,
171 0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf,
172 0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7,
173 0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df,
174 0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7,
175 0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef,
176 0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7,
177 0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff
181 /* The standard kernel character-to-font mappings are not invertible
182 -- this is just a best effort. */
184 #define MAX_GLYPH 512 /* Max possible glyph value */
186 static int inv_translate[MAX_NR_CONSOLES];
190 unsigned long refcount;
192 unsigned char *inverse_translations[4];
193 u16 *inverse_trans_unicode;
196 static struct uni_pagedir *dflt;
198 static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i)
201 unsigned short *t = translations[i];
205 q = p->inverse_translations[i];
208 q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL);
211 memset(q, 0, MAX_GLYPH);
213 for (j = 0; j < E_TABSZ; j++) {
214 glyph = conv_uni_to_pc(conp, t[j]);
215 if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) {
216 /* prefer '-' above SHY etc. */
222 static void set_inverse_trans_unicode(struct vc_data *conp,
223 struct uni_pagedir *p)
230 q = p->inverse_trans_unicode;
232 q = p->inverse_trans_unicode =
233 kmalloc(MAX_GLYPH * sizeof(u16), GFP_KERNEL);
237 memset(q, 0, MAX_GLYPH * sizeof(u16));
239 for (i = 0; i < 32; i++) {
240 p1 = p->uni_pgdir[i];
243 for (j = 0; j < 32; j++) {
247 for (k = 0; k < 64; k++) {
249 if (glyph >= 0 && glyph < MAX_GLYPH
251 q[glyph] = (i << 11) + (j << 6) + k;
257 unsigned short *set_translate(int m, struct vc_data *vc)
259 inv_translate[vc->vc_num] = m;
260 return translations[m];
264 * Inverse translation is impossible for several reasons:
265 * 1. The font<->character maps are not 1-1.
266 * 2. The text may have been written while a different translation map
268 * Still, it is now possible to a certain extent to cut and paste non-ASCII.
270 u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode)
272 struct uni_pagedir *p;
274 if (glyph < 0 || glyph >= MAX_GLYPH)
277 p = *conp->vc_uni_pagedir_loc;
280 else if (use_unicode) {
281 if (!p->inverse_trans_unicode)
284 return p->inverse_trans_unicode[glyph];
286 m = inv_translate[conp->vc_num];
287 if (!p->inverse_translations[m])
290 return p->inverse_translations[m][glyph];
294 EXPORT_SYMBOL_GPL(inverse_translate);
296 static void update_user_maps(void)
299 struct uni_pagedir *p, *q = NULL;
301 for (i = 0; i < MAX_NR_CONSOLES; i++) {
302 if (!vc_cons_allocated(i))
304 p = *vc_cons[i].d->vc_uni_pagedir_loc;
306 set_inverse_transl(vc_cons[i].d, p, USER_MAP);
307 set_inverse_trans_unicode(vc_cons[i].d, p);
314 * Load customizable translation table
315 * arg points to a 256 byte translation table.
317 * The "old" variants are for translation directly to font (using the
318 * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set
319 * Unicodes explicitly.
321 int con_set_trans_old(unsigned char __user * arg)
324 unsigned short inbuf[E_TABSZ];
325 unsigned char ubuf[E_TABSZ];
327 if (copy_from_user(ubuf, arg, E_TABSZ))
330 for (i = 0; i < E_TABSZ ; i++)
331 inbuf[i] = UNI_DIRECT_BASE | ubuf[i];
334 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
340 int con_get_trans_old(unsigned char __user * arg)
343 unsigned short *p = translations[USER_MAP];
344 unsigned char outbuf[E_TABSZ];
347 for (i = 0; i < E_TABSZ ; i++)
349 ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
350 outbuf[i] = (ch & ~0xff) ? 0 : ch;
354 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
357 int con_set_trans_new(ushort __user * arg)
359 unsigned short inbuf[E_TABSZ];
361 if (copy_from_user(inbuf, arg, sizeof(inbuf)))
365 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
371 int con_get_trans_new(ushort __user * arg)
373 unsigned short outbuf[E_TABSZ];
376 memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
379 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
383 * Unicode -> current font conversion
385 * A font has at most 512 chars, usually 256.
386 * But one font position may represent several Unicode chars.
387 * A hashtable is somewhat of a pain to deal with, so use a
388 * "paged table" instead. Simulation has shown the memory cost of
389 * this 3-level paged table scheme to be comparable to a hash table.
392 extern u8 dfont_unicount[]; /* Defined in console_defmap.c */
393 extern u16 dfont_unitable[];
395 static void con_release_unimap(struct uni_pagedir *p)
400 if (p == dflt) dflt = NULL;
401 for (i = 0; i < 32; i++) {
402 p1 = p->uni_pgdir[i];
404 for (j = 0; j < 32; j++)
408 p->uni_pgdir[i] = NULL;
410 for (i = 0; i < 4; i++) {
411 kfree(p->inverse_translations[i]);
412 p->inverse_translations[i] = NULL;
414 kfree(p->inverse_trans_unicode);
415 p->inverse_trans_unicode = NULL;
418 /* Caller must hold the console lock */
419 void con_free_unimap(struct vc_data *vc)
421 struct uni_pagedir *p;
423 p = *vc->vc_uni_pagedir_loc;
426 *vc->vc_uni_pagedir_loc = NULL;
429 con_release_unimap(p);
433 static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p)
436 struct uni_pagedir *q;
438 for (i = 0; i < MAX_NR_CONSOLES; i++) {
439 if (!vc_cons_allocated(i))
441 q = *vc_cons[i].d->vc_uni_pagedir_loc;
442 if (!q || q == p || q->sum != p->sum)
444 for (j = 0; j < 32; j++) {
446 p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j];
451 for (k = 0; k < 32; k++) {
452 if (!p1[k] && !q1[k])
454 if (!p1[k] || !q1[k])
456 if (memcmp(p1[k], q1[k], 64*sizeof(u16)))
464 *conp->vc_uni_pagedir_loc = q;
465 con_release_unimap(p);
474 con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
479 p1 = p->uni_pgdir[n = unicode >> 11];
481 p1 = p->uni_pgdir[n] = kmalloc(32*sizeof(u16 *), GFP_KERNEL);
482 if (!p1) return -ENOMEM;
483 for (i = 0; i < 32; i++)
487 p2 = p1[n = (unicode >> 6) & 0x1f];
489 p2 = p1[n] = kmalloc(64*sizeof(u16), GFP_KERNEL);
490 if (!p2) return -ENOMEM;
491 memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */
494 p2[unicode & 0x3f] = fontpos;
496 p->sum += (fontpos << 20) + unicode;
501 /* Caller must hold the lock */
502 static int con_do_clear_unimap(struct vc_data *vc)
504 struct uni_pagedir *p, *q;
506 p = *vc->vc_uni_pagedir_loc;
507 if (!p || --p->refcount) {
508 q = kzalloc(sizeof(*p), GFP_KERNEL);
515 *vc->vc_uni_pagedir_loc = q;
517 if (p == dflt) dflt = NULL;
520 con_release_unimap(p);
525 int con_clear_unimap(struct vc_data *vc)
529 ret = con_do_clear_unimap(vc);
534 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
536 int err = 0, err1, i;
537 struct uni_pagedir *p, *q;
538 struct unipair *unilist, *plist;
543 unilist = memdup_user(list, ct * sizeof(struct unipair));
545 return PTR_ERR(unilist);
549 /* Save original vc_unipagdir_loc in case we allocate a new one */
550 p = *vc->vc_uni_pagedir_loc;
558 if (p->refcount > 1) {
562 err1 = con_do_clear_unimap(vc);
569 * Since refcount was > 1, con_clear_unimap() allocated a
570 * a new uni_pagedir for this vc. Re: p != q
572 q = *vc->vc_uni_pagedir_loc;
575 * uni_pgdir is a 32*32*64 table with rows allocated
576 * when its first entry is added. The unicode value must
577 * still be incremented for empty rows. We are copying
578 * entries from "p" (old) to "q" (new).
580 l = 0; /* unicode value */
581 for (i = 0; i < 32; i++) {
582 p1 = p->uni_pgdir[i];
584 for (j = 0; j < 32; j++) {
587 for (k = 0; k < 64; k++, l++)
588 if (p2[k] != 0xffff) {
590 * Found one, copy entry for unicode
591 * l with fontpos value p2[k].
593 err1 = con_insert_unipair(q, l, p2[k]);
596 *vc->vc_uni_pagedir_loc = p;
597 con_release_unimap(q);
604 /* Account for row of 64 empty entries */
609 /* Account for empty table */
614 * Finished copying font table, set vc_uni_pagedir to new table
617 } else if (p == dflt) {
622 * Insert user specified unicode pairs into new table.
624 for (plist = unilist; ct; ct--, plist++) {
625 err1 = con_insert_unipair(p, plist->unicode, plist->fontpos);
631 * Merge with fontmaps of any other virtual consoles.
633 if (con_unify_unimap(vc, p))
636 for (i = 0; i <= 3; i++)
637 set_inverse_transl(vc, p, i); /* Update inverse translations */
638 set_inverse_trans_unicode(vc, p);
647 * con_set_default_unimap - set default unicode map
648 * @vc: the console we are updating
650 * Loads the unimap for the hardware font, as defined in uni_hash.tbl.
651 * The representation used was the most compact I could come up
652 * with. This routine is executed at video setup, and when the
653 * PIO_FONTRESET ioctl is called.
655 * The caller must hold the console lock
657 int con_set_default_unimap(struct vc_data *vc)
659 int i, j, err = 0, err1;
661 struct uni_pagedir *p;
664 p = *vc->vc_uni_pagedir_loc;
669 *vc->vc_uni_pagedir_loc = dflt;
670 if (p && !--p->refcount) {
671 con_release_unimap(p);
677 /* The default font is always 256 characters */
679 err = con_do_clear_unimap(vc);
683 p = *vc->vc_uni_pagedir_loc;
686 for (i = 0; i < 256; i++)
687 for (j = dfont_unicount[i]; j; j--) {
688 err1 = con_insert_unipair(p, *(q++), i);
693 if (con_unify_unimap(vc, p)) {
694 dflt = *vc->vc_uni_pagedir_loc;
698 for (i = 0; i <= 3; i++)
699 set_inverse_transl(vc, p, i); /* Update all inverse translations */
700 set_inverse_trans_unicode(vc, p);
704 EXPORT_SYMBOL(con_set_default_unimap);
707 * con_copy_unimap - copy unimap between two vts
711 * The caller must hold the console lock when invoking this method
713 int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
715 struct uni_pagedir *q;
717 if (!*src_vc->vc_uni_pagedir_loc)
719 if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc)
721 con_free_unimap(dst_vc);
722 q = *src_vc->vc_uni_pagedir_loc;
724 *dst_vc->vc_uni_pagedir_loc = q;
727 EXPORT_SYMBOL(con_copy_unimap);
730 * con_get_unimap - get the unicode map
731 * @vc: the console to read from
733 * Read the console unicode data for this console. Called from the ioctl
736 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
738 int i, j, k, ret = 0;
741 struct uni_pagedir *p;
742 struct unipair *unilist;
744 unilist = kmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL);
751 if (*vc->vc_uni_pagedir_loc) {
752 p = *vc->vc_uni_pagedir_loc;
753 for (i = 0; i < 32; i++) {
754 p1 = p->uni_pgdir[i];
756 for (j = 0; j < 32; j++) {
759 for (k = 0; k < 64; k++, p2++) {
760 if (*p2 >= MAX_GLYPH)
763 unilist[ect].unicode =
765 unilist[ect].fontpos = *p2;
773 if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair)))
777 return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
781 * Always use USER_MAP. These functions are used by the keyboard,
782 * which shouldn't be affected by G0/G1 switching, etc.
783 * If the user map still contains default values, i.e. the
784 * direct-to-font mapping, then assume user is using Latin1.
786 * FIXME: at some point we need to decide if we want to lock the table
787 * update element itself via the keyboard_event_lock for consistency with the
788 * keyboard driver as well as the consoles
790 /* may be called during an interrupt */
791 u32 conv_8bit_to_uni(unsigned char c)
793 unsigned short uni = translations[USER_MAP][c];
794 return uni == (0xf000 | c) ? c : uni;
797 int conv_uni_to_8bit(u32 uni)
800 for (c = 0; c < 0x100; c++)
801 if (translations[USER_MAP][c] == uni ||
802 (translations[USER_MAP][c] == (c | 0xf000) && uni == c))
808 conv_uni_to_pc(struct vc_data *conp, long ucs)
812 struct uni_pagedir *p;
814 /* Only 16-bit codes supported at this time */
816 return -4; /* Not found */
818 return -1; /* Not a printable character */
819 else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f))
820 return -2; /* Zero-width space */
822 * UNI_DIRECT_BASE indicates the start of the region in the User Zone
823 * which always has a 1:1 mapping to the currently loaded font. The
824 * UNI_DIRECT_MASK indicates the bit span of the region.
826 else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
827 return ucs & UNI_DIRECT_MASK;
829 if (!*conp->vc_uni_pagedir_loc)
832 p = *conp->vc_uni_pagedir_loc;
833 if ((p1 = p->uni_pgdir[ucs >> 11]) &&
834 (p2 = p1[(ucs >> 6) & 0x1f]) &&
835 (h = p2[ucs & 0x3f]) < MAX_GLYPH)
838 return -4; /* not found */
842 * This is called at sys_setup time, after memory and the console are
843 * initialized. It must be possible to call kmalloc(..., GFP_KERNEL)
844 * from this function, hence the call from sys_setup.
847 console_map_init(void)
851 for (i = 0; i < MAX_NR_CONSOLES; i++)
852 if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc)
853 con_set_default_unimap(vc_cons[i].d);