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