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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * consolemap.c
4 *
5 * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code)
6 * to font positions.
7 *
8 * aeb, 950210
9 *
10 * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998
11 *
12 * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998
13 *
14 * In order to prevent the following circular lock dependency:
15 * &mm->mmap_lock --> cpu_hotplug.lock --> console_lock --> &mm->mmap_lock
16 *
17 * We cannot allow page fault to happen while holding the console_lock.
18 * Therefore, all the userspace copy operations have to be done outside
19 * the console_lock critical sections.
20 *
21 * As all the affected functions are all called directly from vt_ioctl(), we
22 * can allocate some small buffers directly on stack without worrying about
23 * stack overflow.
24 */
25
26#include <linux/module.h>
27#include <linux/kd.h>
28#include <linux/errno.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/init.h>
32#include <linux/tty.h>
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>
38
39static unsigned short translations[][256] = {
40 /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
41 {
42 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
43 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
44 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
45 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
46 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
47 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
48 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
49 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
50 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
51 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
52 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
53 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
54 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
55 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
56 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
57 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
58 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
59 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
60 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
61 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
62 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
63 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
64 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
65 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
66 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
67 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
68 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
69 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
70 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
71 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
72 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
73 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
74 },
75 /* VT100 graphics mapped to Unicode */
76 {
77 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
78 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
79 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
80 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
81 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
82 0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f,
83 0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
84 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
85 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
86 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
87 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
88 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0,
89 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
90 0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
91 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
92 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f,
93 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
94 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
95 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
96 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
97 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
98 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
99 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
100 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
101 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
102 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
103 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
104 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
105 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
106 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
107 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
108 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
109 },
110 /* IBM Codepage 437 mapped to Unicode */
111 {
112 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
113 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
114 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8,
115 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc,
116 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
117 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
118 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
119 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
120 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
121 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
122 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
123 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
124 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
125 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
126 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
127 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
128 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
129 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
130 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
131 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
132 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
133 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
134 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
135 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
136 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
137 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
138 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
139 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
140 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
141 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
142 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
143 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
144 },
145 /* User mapping -- default to codes for direct font mapping */
146 {
147 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007,
148 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f,
149 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017,
150 0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
151 0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
152 0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f,
153 0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
154 0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f,
155 0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047,
156 0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f,
157 0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057,
158 0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f,
159 0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067,
160 0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f,
161 0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077,
162 0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f,
163 0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087,
164 0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f,
165 0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097,
166 0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f,
167 0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7,
168 0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af,
169 0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7,
170 0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf,
171 0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7,
172 0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf,
173 0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7,
174 0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df,
175 0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7,
176 0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef,
177 0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7,
178 0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff
179 }
180};
181
182/* The standard kernel character-to-font mappings are not invertible
183 -- this is just a best effort. */
184
185#define MAX_GLYPH 512 /* Max possible glyph value */
186
187static int inv_translate[MAX_NR_CONSOLES];
188
189struct uni_pagedir {
190 u16 **uni_pgdir[32];
191 unsigned long refcount;
192 unsigned long sum;
193 unsigned char *inverse_translations[4];
194 u16 *inverse_trans_unicode;
195};
196
197static struct uni_pagedir *dflt;
198
199static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i)
200{
201 int j, glyph;
202 unsigned short *t = translations[i];
203 unsigned char *q;
204
205 if (!p) return;
206 q = p->inverse_translations[i];
207
208 if (!q) {
209 q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL);
210 if (!q) return;
211 }
212 memset(q, 0, MAX_GLYPH);
213
214 for (j = 0; j < E_TABSZ; j++) {
215 glyph = conv_uni_to_pc(conp, t[j]);
216 if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) {
217 /* prefer '-' above SHY etc. */
218 q[glyph] = j;
219 }
220 }
221}
222
223static void set_inverse_trans_unicode(struct vc_data *conp,
224 struct uni_pagedir *p)
225{
226 int i, j, k, glyph;
227 u16 **p1, *p2;
228 u16 *q;
229
230 if (!p) return;
231 q = p->inverse_trans_unicode;
232 if (!q) {
233 q = p->inverse_trans_unicode =
234 kmalloc_array(MAX_GLYPH, sizeof(u16), GFP_KERNEL);
235 if (!q)
236 return;
237 }
238 memset(q, 0, MAX_GLYPH * sizeof(u16));
239
240 for (i = 0; i < 32; i++) {
241 p1 = p->uni_pgdir[i];
242 if (!p1)
243 continue;
244 for (j = 0; j < 32; j++) {
245 p2 = p1[j];
246 if (!p2)
247 continue;
248 for (k = 0; k < 64; k++) {
249 glyph = p2[k];
250 if (glyph >= 0 && glyph < MAX_GLYPH
251 && q[glyph] < 32)
252 q[glyph] = (i << 11) + (j << 6) + k;
253 }
254 }
255 }
256}
257
258unsigned short *set_translate(int m, struct vc_data *vc)
259{
260 inv_translate[vc->vc_num] = m;
261 return translations[m];
262}
263
264/*
265 * Inverse translation is impossible for several reasons:
266 * 1. The font<->character maps are not 1-1.
267 * 2. The text may have been written while a different translation map
268 * was active.
269 * Still, it is now possible to a certain extent to cut and paste non-ASCII.
270 */
271u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode)
272{
273 struct uni_pagedir *p;
274 int m;
275 if (glyph < 0 || glyph >= MAX_GLYPH)
276 return 0;
277 else {
278 p = *conp->vc_uni_pagedir_loc;
279 if (!p)
280 return glyph;
281 else if (use_unicode) {
282 if (!p->inverse_trans_unicode)
283 return glyph;
284 else
285 return p->inverse_trans_unicode[glyph];
286 } else {
287 m = inv_translate[conp->vc_num];
288 if (!p->inverse_translations[m])
289 return glyph;
290 else
291 return p->inverse_translations[m][glyph];
292 }
293 }
294}
295EXPORT_SYMBOL_GPL(inverse_translate);
296
297static void update_user_maps(void)
298{
299 int i;
300 struct uni_pagedir *p, *q = NULL;
301
302 for (i = 0; i < MAX_NR_CONSOLES; i++) {
303 if (!vc_cons_allocated(i))
304 continue;
305 p = *vc_cons[i].d->vc_uni_pagedir_loc;
306 if (p && p != q) {
307 set_inverse_transl(vc_cons[i].d, p, USER_MAP);
308 set_inverse_trans_unicode(vc_cons[i].d, p);
309 q = p;
310 }
311 }
312}
313
314/*
315 * Load customizable translation table
316 * arg points to a 256 byte translation table.
317 *
318 * The "old" variants are for translation directly to font (using the
319 * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set
320 * Unicodes explicitly.
321 */
322int con_set_trans_old(unsigned char __user * arg)
323{
324 int i;
325 unsigned short inbuf[E_TABSZ];
326 unsigned char ubuf[E_TABSZ];
327
328 if (copy_from_user(ubuf, arg, E_TABSZ))
329 return -EFAULT;
330
331 for (i = 0; i < E_TABSZ ; i++)
332 inbuf[i] = UNI_DIRECT_BASE | ubuf[i];
333
334 console_lock();
335 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
336 update_user_maps();
337 console_unlock();
338 return 0;
339}
340
341int con_get_trans_old(unsigned char __user * arg)
342{
343 int i, ch;
344 unsigned short *p = translations[USER_MAP];
345 unsigned char outbuf[E_TABSZ];
346
347 console_lock();
348 for (i = 0; i < E_TABSZ ; i++)
349 {
350 ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
351 outbuf[i] = (ch & ~0xff) ? 0 : ch;
352 }
353 console_unlock();
354
355 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
356}
357
358int con_set_trans_new(ushort __user * arg)
359{
360 unsigned short inbuf[E_TABSZ];
361
362 if (copy_from_user(inbuf, arg, sizeof(inbuf)))
363 return -EFAULT;
364
365 console_lock();
366 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
367 update_user_maps();
368 console_unlock();
369 return 0;
370}
371
372int con_get_trans_new(ushort __user * arg)
373{
374 unsigned short outbuf[E_TABSZ];
375
376 console_lock();
377 memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
378 console_unlock();
379
380 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
381}
382
383/*
384 * Unicode -> current font conversion
385 *
386 * A font has at most 512 chars, usually 256.
387 * But one font position may represent several Unicode chars.
388 * A hashtable is somewhat of a pain to deal with, so use a
389 * "paged table" instead. Simulation has shown the memory cost of
390 * this 3-level paged table scheme to be comparable to a hash table.
391 */
392
393extern u8 dfont_unicount[]; /* Defined in console_defmap.c */
394extern u16 dfont_unitable[];
395
396static void con_release_unimap(struct uni_pagedir *p)
397{
398 u16 **p1;
399 int i, j;
400
401 if (p == dflt) dflt = NULL;
402 for (i = 0; i < 32; i++) {
403 p1 = p->uni_pgdir[i];
404 if (p1 != NULL) {
405 for (j = 0; j < 32; j++)
406 kfree(p1[j]);
407 kfree(p1);
408 }
409 p->uni_pgdir[i] = NULL;
410 }
411 for (i = 0; i < 4; i++) {
412 kfree(p->inverse_translations[i]);
413 p->inverse_translations[i] = NULL;
414 }
415 kfree(p->inverse_trans_unicode);
416 p->inverse_trans_unicode = NULL;
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 = *vc->vc_uni_pagedir_loc;
425 if (!p)
426 return;
427 *vc->vc_uni_pagedir_loc = NULL;
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 = *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 = 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 p1 = p->uni_pgdir[n = unicode >> 11];
481 if (!p1) {
482 p1 = p->uni_pgdir[n] = kmalloc_array(32, sizeof(u16 *),
483 GFP_KERNEL);
484 if (!p1) return -ENOMEM;
485 for (i = 0; i < 32; i++)
486 p1[i] = NULL;
487 }
488
489 p2 = p1[n = (unicode >> 6) & 0x1f];
490 if (!p2) {
491 p2 = p1[n] = kmalloc_array(64, sizeof(u16), GFP_KERNEL);
492 if (!p2) return -ENOMEM;
493 memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */
494 }
495
496 p2[unicode & 0x3f] = fontpos;
497
498 p->sum += (fontpos << 20) + unicode;
499
500 return 0;
501}
502
503/* Caller must hold the lock */
504static int con_do_clear_unimap(struct vc_data *vc)
505{
506 struct uni_pagedir *p, *q;
507
508 p = *vc->vc_uni_pagedir_loc;
509 if (!p || --p->refcount) {
510 q = kzalloc(sizeof(*p), GFP_KERNEL);
511 if (!q) {
512 if (p)
513 p->refcount++;
514 return -ENOMEM;
515 }
516 q->refcount=1;
517 *vc->vc_uni_pagedir_loc = q;
518 } else {
519 if (p == dflt) dflt = NULL;
520 p->refcount++;
521 p->sum = 0;
522 con_release_unimap(p);
523 }
524 return 0;
525}
526
527int con_clear_unimap(struct vc_data *vc)
528{
529 int ret;
530 console_lock();
531 ret = con_do_clear_unimap(vc);
532 console_unlock();
533 return ret;
534}
535
536int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
537{
538 int err = 0, err1, i;
539 struct uni_pagedir *p, *q;
540 struct unipair *unilist, *plist;
541
542 if (!ct)
543 return 0;
544
545 unilist = vmemdup_user(list, array_size(sizeof(struct unipair), ct));
546 if (IS_ERR(unilist))
547 return PTR_ERR(unilist);
548
549 console_lock();
550
551 /* Save original vc_unipagdir_loc in case we allocate a new one */
552 p = *vc->vc_uni_pagedir_loc;
553
554 if (!p) {
555 err = -EINVAL;
556
557 goto out_unlock;
558 }
559
560 if (p->refcount > 1) {
561 int j, k;
562 u16 **p1, *p2, l;
563
564 err1 = con_do_clear_unimap(vc);
565 if (err1) {
566 err = err1;
567 goto out_unlock;
568 }
569
570 /*
571 * Since refcount was > 1, con_clear_unimap() allocated a
572 * a new uni_pagedir for this vc. Re: p != q
573 */
574 q = *vc->vc_uni_pagedir_loc;
575
576 /*
577 * uni_pgdir is a 32*32*64 table with rows allocated
578 * when its first entry is added. The unicode value must
579 * still be incremented for empty rows. We are copying
580 * entries from "p" (old) to "q" (new).
581 */
582 l = 0; /* unicode value */
583 for (i = 0; i < 32; i++) {
584 p1 = p->uni_pgdir[i];
585 if (p1)
586 for (j = 0; j < 32; j++) {
587 p2 = p1[j];
588 if (p2) {
589 for (k = 0; k < 64; k++, l++)
590 if (p2[k] != 0xffff) {
591 /*
592 * Found one, copy entry for unicode
593 * l with fontpos value p2[k].
594 */
595 err1 = con_insert_unipair(q, l, p2[k]);
596 if (err1) {
597 p->refcount++;
598 *vc->vc_uni_pagedir_loc = p;
599 con_release_unimap(q);
600 kfree(q);
601 err = err1;
602 goto out_unlock;
603 }
604 }
605 } else {
606 /* Account for row of 64 empty entries */
607 l += 64;
608 }
609 }
610 else
611 /* Account for empty table */
612 l += 32 * 64;
613 }
614
615 /*
616 * Finished copying font table, set vc_uni_pagedir to new table
617 */
618 p = q;
619 } else if (p == dflt) {
620 dflt = NULL;
621 }
622
623 /*
624 * Insert user specified unicode pairs into new table.
625 */
626 for (plist = unilist; ct; ct--, plist++) {
627 err1 = con_insert_unipair(p, plist->unicode, plist->fontpos);
628 if (err1)
629 err = err1;
630 }
631
632 /*
633 * Merge with fontmaps of any other virtual consoles.
634 */
635 if (con_unify_unimap(vc, p))
636 goto out_unlock;
637
638 for (i = 0; i <= 3; i++)
639 set_inverse_transl(vc, p, i); /* Update inverse translations */
640 set_inverse_trans_unicode(vc, p);
641
642out_unlock:
643 console_unlock();
644 kvfree(unilist);
645 return err;
646}
647
648/**
649 * con_set_default_unimap - set default unicode map
650 * @vc: the console we are updating
651 *
652 * Loads the unimap for the hardware font, as defined in uni_hash.tbl.
653 * The representation used was the most compact I could come up
654 * with. This routine is executed at video setup, and when the
655 * PIO_FONTRESET ioctl is called.
656 *
657 * The caller must hold the console lock
658 */
659int con_set_default_unimap(struct vc_data *vc)
660{
661 int i, j, err = 0, err1;
662 u16 *q;
663 struct uni_pagedir *p;
664
665 if (dflt) {
666 p = *vc->vc_uni_pagedir_loc;
667 if (p == dflt)
668 return 0;
669
670 dflt->refcount++;
671 *vc->vc_uni_pagedir_loc = dflt;
672 if (p && !--p->refcount) {
673 con_release_unimap(p);
674 kfree(p);
675 }
676 return 0;
677 }
678
679 /* The default font is always 256 characters */
680
681 err = con_do_clear_unimap(vc);
682 if (err)
683 return err;
684
685 p = *vc->vc_uni_pagedir_loc;
686 q = dfont_unitable;
687
688 for (i = 0; i < 256; i++)
689 for (j = dfont_unicount[i]; j; j--) {
690 err1 = con_insert_unipair(p, *(q++), i);
691 if (err1)
692 err = err1;
693 }
694
695 if (con_unify_unimap(vc, p)) {
696 dflt = *vc->vc_uni_pagedir_loc;
697 return err;
698 }
699
700 for (i = 0; i <= 3; i++)
701 set_inverse_transl(vc, p, i); /* Update all inverse translations */
702 set_inverse_trans_unicode(vc, p);
703 dflt = p;
704 return err;
705}
706EXPORT_SYMBOL(con_set_default_unimap);
707
708/**
709 * con_copy_unimap - copy unimap between two vts
710 * @dst_vc: target
711 * @src_vt: source
712 *
713 * The caller must hold the console lock when invoking this method
714 */
715int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
716{
717 struct uni_pagedir *q;
718
719 if (!*src_vc->vc_uni_pagedir_loc)
720 return -EINVAL;
721 if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc)
722 return 0;
723 con_free_unimap(dst_vc);
724 q = *src_vc->vc_uni_pagedir_loc;
725 q->refcount++;
726 *dst_vc->vc_uni_pagedir_loc = q;
727 return 0;
728}
729EXPORT_SYMBOL(con_copy_unimap);
730
731/**
732 * con_get_unimap - get the unicode map
733 * @vc: the console to read from
734 *
735 * Read the console unicode data for this console. Called from the ioctl
736 * handlers.
737 */
738int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
739{
740 int i, j, k, ret = 0;
741 ushort ect;
742 u16 **p1, *p2;
743 struct uni_pagedir *p;
744 struct unipair *unilist;
745
746 unilist = kvmalloc_array(ct, sizeof(struct unipair), GFP_KERNEL);
747 if (!unilist)
748 return -ENOMEM;
749
750 console_lock();
751
752 ect = 0;
753 if (*vc->vc_uni_pagedir_loc) {
754 p = *vc->vc_uni_pagedir_loc;
755 for (i = 0; i < 32; i++) {
756 p1 = p->uni_pgdir[i];
757 if (p1)
758 for (j = 0; j < 32; j++) {
759 p2 = *(p1++);
760 if (p2)
761 for (k = 0; k < 64; k++, p2++) {
762 if (*p2 >= MAX_GLYPH)
763 continue;
764 if (ect < ct) {
765 unilist[ect].unicode =
766 (i<<11)+(j<<6)+k;
767 unilist[ect].fontpos = *p2;
768 }
769 ect++;
770 }
771 }
772 }
773 }
774 console_unlock();
775 if (copy_to_user(list, unilist, min(ect, ct) * sizeof(struct unipair)))
776 ret = -EFAULT;
777 put_user(ect, uct);
778 kvfree(unilist);
779 return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
780}
781
782/*
783 * Always use USER_MAP. These functions are used by the keyboard,
784 * which shouldn't be affected by G0/G1 switching, etc.
785 * If the user map still contains default values, i.e. the
786 * direct-to-font mapping, then assume user is using Latin1.
787 *
788 * FIXME: at some point we need to decide if we want to lock the table
789 * update element itself via the keyboard_event_lock for consistency with the
790 * keyboard driver as well as the consoles
791 */
792/* may be called during an interrupt */
793u32 conv_8bit_to_uni(unsigned char c)
794{
795 unsigned short uni = translations[USER_MAP][c];
796 return uni == (0xf000 | c) ? c : uni;
797}
798
799int conv_uni_to_8bit(u32 uni)
800{
801 int c;
802 for (c = 0; c < 0x100; c++)
803 if (translations[USER_MAP][c] == uni ||
804 (translations[USER_MAP][c] == (c | 0xf000) && uni == c))
805 return c;
806 return -1;
807}
808
809int
810conv_uni_to_pc(struct vc_data *conp, long ucs)
811{
812 int h;
813 u16 **p1, *p2;
814 struct uni_pagedir *p;
815
816 /* Only 16-bit codes supported at this time */
817 if (ucs > 0xffff)
818 return -4; /* Not found */
819 else if (ucs < 0x20)
820 return -1; /* Not a printable character */
821 else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f))
822 return -2; /* Zero-width space */
823 /*
824 * UNI_DIRECT_BASE indicates the start of the region in the User Zone
825 * which always has a 1:1 mapping to the currently loaded font. The
826 * UNI_DIRECT_MASK indicates the bit span of the region.
827 */
828 else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
829 return ucs & UNI_DIRECT_MASK;
830
831 if (!*conp->vc_uni_pagedir_loc)
832 return -3;
833
834 p = *conp->vc_uni_pagedir_loc;
835 if ((p1 = p->uni_pgdir[ucs >> 11]) &&
836 (p2 = p1[(ucs >> 6) & 0x1f]) &&
837 (h = p2[ucs & 0x3f]) < MAX_GLYPH)
838 return h;
839
840 return -4; /* not found */
841}
842
843/*
844 * This is called at sys_setup time, after memory and the console are
845 * initialized. It must be possible to call kmalloc(..., GFP_KERNEL)
846 * from this function, hence the call from sys_setup.
847 */
848void __init
849console_map_init(void)
850{
851 int i;
852
853 for (i = 0; i < MAX_NR_CONSOLES; i++)
854 if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc)
855 con_set_default_unimap(vc_cons[i].d);
856}
857
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);