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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/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] = 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 console_lock();
316 for (i=0; i<E_TABSZ ; i++) {
317 unsigned char uc;
318 __get_user(uc, arg+i);
319 p[i] = UNI_DIRECT_BASE | uc;
320 }
321
322 update_user_maps();
323 console_unlock();
324 return 0;
325}
326
327int con_get_trans_old(unsigned char __user * arg)
328{
329 int i, ch;
330 unsigned short *p = translations[USER_MAP];
331
332 if (!access_ok(VERIFY_WRITE, arg, E_TABSZ))
333 return -EFAULT;
334
335 console_lock();
336 for (i=0; i<E_TABSZ ; i++)
337 {
338 ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
339 __put_user((ch & ~0xff) ? 0 : ch, arg+i);
340 }
341 console_unlock();
342 return 0;
343}
344
345int con_set_trans_new(ushort __user * arg)
346{
347 int i;
348 unsigned short *p = translations[USER_MAP];
349
350 if (!access_ok(VERIFY_READ, arg, E_TABSZ*sizeof(unsigned short)))
351 return -EFAULT;
352
353 console_lock();
354 for (i=0; i<E_TABSZ ; i++) {
355 unsigned short us;
356 __get_user(us, arg+i);
357 p[i] = us;
358 }
359
360 update_user_maps();
361 console_unlock();
362 return 0;
363}
364
365int con_get_trans_new(ushort __user * arg)
366{
367 int i;
368 unsigned short *p = translations[USER_MAP];
369
370 if (!access_ok(VERIFY_WRITE, arg, E_TABSZ*sizeof(unsigned short)))
371 return -EFAULT;
372
373 console_lock();
374 for (i=0; i<E_TABSZ ; i++)
375 __put_user(p[i], arg+i);
376 console_unlock();
377
378 return 0;
379}
380
381/*
382 * Unicode -> current font conversion
383 *
384 * A font has at most 512 chars, usually 256.
385 * But one font position may represent several Unicode chars.
386 * A hashtable is somewhat of a pain to deal with, so use a
387 * "paged table" instead. Simulation has shown the memory cost of
388 * this 3-level paged table scheme to be comparable to a hash table.
389 */
390
391extern u8 dfont_unicount[]; /* Defined in console_defmap.c */
392extern u16 dfont_unitable[];
393
394static void con_release_unimap(struct uni_pagedir *p)
395{
396 u16 **p1;
397 int i, j;
398
399 if (p == dflt) dflt = NULL;
400 for (i = 0; i < 32; i++) {
401 if ((p1 = p->uni_pgdir[i]) != NULL) {
402 for (j = 0; j < 32; j++)
403 kfree(p1[j]);
404 kfree(p1);
405 }
406 p->uni_pgdir[i] = NULL;
407 }
408 for (i = 0; i < 4; i++) {
409 kfree(p->inverse_translations[i]);
410 p->inverse_translations[i] = NULL;
411 }
412 kfree(p->inverse_trans_unicode);
413 p->inverse_trans_unicode = NULL;
414}
415
416/* Caller must hold the console lock */
417void con_free_unimap(struct vc_data *vc)
418{
419 struct uni_pagedir *p;
420
421 p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
422 if (!p)
423 return;
424 *vc->vc_uni_pagedir_loc = 0;
425 if (--p->refcount)
426 return;
427 con_release_unimap(p);
428 kfree(p);
429}
430
431static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p)
432{
433 int i, j, k;
434 struct uni_pagedir *q;
435
436 for (i = 0; i < MAX_NR_CONSOLES; i++) {
437 if (!vc_cons_allocated(i))
438 continue;
439 q = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc;
440 if (!q || q == p || q->sum != p->sum)
441 continue;
442 for (j = 0; j < 32; j++) {
443 u16 **p1, **q1;
444 p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j];
445 if (!p1 && !q1)
446 continue;
447 if (!p1 || !q1)
448 break;
449 for (k = 0; k < 32; k++) {
450 if (!p1[k] && !q1[k])
451 continue;
452 if (!p1[k] || !q1[k])
453 break;
454 if (memcmp(p1[k], q1[k], 64*sizeof(u16)))
455 break;
456 }
457 if (k < 32)
458 break;
459 }
460 if (j == 32) {
461 q->refcount++;
462 *conp->vc_uni_pagedir_loc = (unsigned long)q;
463 con_release_unimap(p);
464 kfree(p);
465 return 1;
466 }
467 }
468 return 0;
469}
470
471static int
472con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
473{
474 int i, n;
475 u16 **p1, *p2;
476
477 if (!(p1 = p->uni_pgdir[n = unicode >> 11])) {
478 p1 = p->uni_pgdir[n] = kmalloc(32*sizeof(u16 *), GFP_KERNEL);
479 if (!p1) return -ENOMEM;
480 for (i = 0; i < 32; i++)
481 p1[i] = NULL;
482 }
483
484 if (!(p2 = p1[n = (unicode >> 6) & 0x1f])) {
485 p2 = p1[n] = kmalloc(64*sizeof(u16), GFP_KERNEL);
486 if (!p2) return -ENOMEM;
487 memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */
488 }
489
490 p2[unicode & 0x3f] = fontpos;
491
492 p->sum += (fontpos << 20) + unicode;
493
494 return 0;
495}
496
497/* ui is a leftover from using a hashtable, but might be used again
498 Caller must hold the lock */
499static int con_do_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
500{
501 struct uni_pagedir *p, *q;
502
503 p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
504 if (p && p->readonly)
505 return -EIO;
506
507 if (!p || --p->refcount) {
508 q = kzalloc(sizeof(*p), GFP_KERNEL);
509 if (!q) {
510 if (p)
511 p->refcount++;
512 return -ENOMEM;
513 }
514 q->refcount=1;
515 *vc->vc_uni_pagedir_loc = (unsigned long)q;
516 } else {
517 if (p == dflt) dflt = NULL;
518 p->refcount++;
519 p->sum = 0;
520 con_release_unimap(p);
521 }
522 return 0;
523}
524
525int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
526{
527 int ret;
528 console_lock();
529 ret = con_do_clear_unimap(vc, ui);
530 console_unlock();
531 return ret;
532}
533
534int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
535{
536 int err = 0, err1, i;
537 struct uni_pagedir *p, *q;
538
539 console_lock();
540
541 /* Save original vc_unipagdir_loc in case we allocate a new one */
542 p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
543 if (p->readonly) {
544 console_unlock();
545 return -EIO;
546 }
547
548 if (!ct) {
549 console_unlock();
550 return 0;
551 }
552
553 if (p->refcount > 1) {
554 int j, k;
555 u16 **p1, *p2, l;
556
557 err1 = con_do_clear_unimap(vc, NULL);
558 if (err1) {
559 console_unlock();
560 return err1;
561 }
562
563 /*
564 * Since refcount was > 1, con_clear_unimap() allocated a
565 * a new uni_pagedir for this vc. Re: p != q
566 */
567 q = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
568
569 /*
570 * uni_pgdir is a 32*32*64 table with rows allocated
571 * when its first entry is added. The unicode value must
572 * still be incremented for empty rows. We are copying
573 * entries from "p" (old) to "q" (new).
574 */
575 l = 0; /* unicode value */
576 for (i = 0; i < 32; i++)
577 if ((p1 = p->uni_pgdir[i]))
578 for (j = 0; j < 32; j++)
579 if ((p2 = p1[j])) {
580 for (k = 0; k < 64; k++, l++)
581 if (p2[k] != 0xffff) {
582 /*
583 * Found one, copy entry for unicode
584 * l with fontpos value p2[k].
585 */
586 err1 = con_insert_unipair(q, l, p2[k]);
587 if (err1) {
588 p->refcount++;
589 *vc->vc_uni_pagedir_loc = (unsigned long)p;
590 con_release_unimap(q);
591 kfree(q);
592 console_unlock();
593 return err1;
594 }
595 }
596 } else {
597 /* Account for row of 64 empty entries */
598 l += 64;
599 }
600 else
601 /* Account for empty table */
602 l += 32 * 64;
603
604 /*
605 * Finished copying font table, set vc_uni_pagedir to new table
606 */
607 p = q;
608 } else if (p == dflt) {
609 dflt = NULL;
610 }
611
612 /*
613 * Insert user specified unicode pairs into new table.
614 */
615 while (ct--) {
616 unsigned short unicode, fontpos;
617 __get_user(unicode, &list->unicode);
618 __get_user(fontpos, &list->fontpos);
619 if ((err1 = con_insert_unipair(p, unicode,fontpos)) != 0)
620 err = err1;
621 list++;
622 }
623
624 /*
625 * Merge with fontmaps of any other virtual consoles.
626 */
627 if (con_unify_unimap(vc, p)) {
628 console_unlock();
629 return err;
630 }
631
632 for (i = 0; i <= 3; i++)
633 set_inverse_transl(vc, p, i); /* Update inverse translations */
634 set_inverse_trans_unicode(vc, p);
635
636 console_unlock();
637 return err;
638}
639
640/**
641 * con_set_default_unimap - set default unicode map
642 * @vc: the console we are updating
643 *
644 * Loads the unimap for the hardware font, as defined in uni_hash.tbl.
645 * The representation used was the most compact I could come up
646 * with. This routine is executed at video setup, and when the
647 * PIO_FONTRESET ioctl is called.
648 *
649 * The caller must hold the console lock
650 */
651int con_set_default_unimap(struct vc_data *vc)
652{
653 int i, j, err = 0, err1;
654 u16 *q;
655 struct uni_pagedir *p;
656
657 if (dflt) {
658 p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
659 if (p == dflt)
660 return 0;
661
662 dflt->refcount++;
663 *vc->vc_uni_pagedir_loc = (unsigned long)dflt;
664 if (p && !--p->refcount) {
665 con_release_unimap(p);
666 kfree(p);
667 }
668 return 0;
669 }
670
671 /* The default font is always 256 characters */
672
673 err = con_do_clear_unimap(vc, NULL);
674 if (err)
675 return err;
676
677 p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
678 q = dfont_unitable;
679
680 for (i = 0; i < 256; i++)
681 for (j = dfont_unicount[i]; j; j--) {
682 err1 = con_insert_unipair(p, *(q++), i);
683 if (err1)
684 err = err1;
685 }
686
687 if (con_unify_unimap(vc, p)) {
688 dflt = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
689 return err;
690 }
691
692 for (i = 0; i <= 3; i++)
693 set_inverse_transl(vc, p, i); /* Update all inverse translations */
694 set_inverse_trans_unicode(vc, p);
695 dflt = p;
696 return err;
697}
698EXPORT_SYMBOL(con_set_default_unimap);
699
700/**
701 * con_copy_unimap - copy unimap between two vts
702 * @dst_vc: target
703 * @src_vt: source
704 *
705 * The caller must hold the console lock when invoking this method
706 */
707int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
708{
709 struct uni_pagedir *q;
710
711 if (!*src_vc->vc_uni_pagedir_loc)
712 return -EINVAL;
713 if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc)
714 return 0;
715 con_free_unimap(dst_vc);
716 q = (struct uni_pagedir *)*src_vc->vc_uni_pagedir_loc;
717 q->refcount++;
718 *dst_vc->vc_uni_pagedir_loc = (long)q;
719 return 0;
720}
721EXPORT_SYMBOL(con_copy_unimap);
722
723/**
724 * con_get_unimap - get the unicode map
725 * @vc: the console to read from
726 *
727 * Read the console unicode data for this console. Called from the ioctl
728 * handlers.
729 */
730int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
731{
732 int i, j, k, ect;
733 u16 **p1, *p2;
734 struct uni_pagedir *p;
735
736 console_lock();
737
738 ect = 0;
739 if (*vc->vc_uni_pagedir_loc) {
740 p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
741 for (i = 0; i < 32; i++)
742 if ((p1 = p->uni_pgdir[i]))
743 for (j = 0; j < 32; j++)
744 if ((p2 = *(p1++)))
745 for (k = 0; k < 64; k++) {
746 if (*p2 < MAX_GLYPH && ect++ < ct) {
747 __put_user((u_short)((i<<11)+(j<<6)+k),
748 &list->unicode);
749 __put_user((u_short) *p2,
750 &list->fontpos);
751 list++;
752 }
753 p2++;
754 }
755 }
756 __put_user(ect, uct);
757 console_unlock();
758 return ((ect <= ct) ? 0 : -ENOMEM);
759}
760
761/*
762 * Always use USER_MAP. These functions are used by the keyboard,
763 * which shouldn't be affected by G0/G1 switching, etc.
764 * If the user map still contains default values, i.e. the
765 * direct-to-font mapping, then assume user is using Latin1.
766 *
767 * FIXME: at some point we need to decide if we want to lock the table
768 * update element itself via the keyboard_event_lock for consistency with the
769 * keyboard driver as well as the consoles
770 */
771/* may be called during an interrupt */
772u32 conv_8bit_to_uni(unsigned char c)
773{
774 unsigned short uni = translations[USER_MAP][c];
775 return uni == (0xf000 | c) ? c : uni;
776}
777
778int conv_uni_to_8bit(u32 uni)
779{
780 int c;
781 for (c = 0; c < 0x100; c++)
782 if (translations[USER_MAP][c] == uni ||
783 (translations[USER_MAP][c] == (c | 0xf000) && uni == c))
784 return c;
785 return -1;
786}
787
788int
789conv_uni_to_pc(struct vc_data *conp, long ucs)
790{
791 int h;
792 u16 **p1, *p2;
793 struct uni_pagedir *p;
794
795 /* Only 16-bit codes supported at this time */
796 if (ucs > 0xffff)
797 return -4; /* Not found */
798 else if (ucs < 0x20)
799 return -1; /* Not a printable character */
800 else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f))
801 return -2; /* Zero-width space */
802 /*
803 * UNI_DIRECT_BASE indicates the start of the region in the User Zone
804 * which always has a 1:1 mapping to the currently loaded font. The
805 * UNI_DIRECT_MASK indicates the bit span of the region.
806 */
807 else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
808 return ucs & UNI_DIRECT_MASK;
809
810 if (!*conp->vc_uni_pagedir_loc)
811 return -3;
812
813 p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc;
814 if ((p1 = p->uni_pgdir[ucs >> 11]) &&
815 (p2 = p1[(ucs >> 6) & 0x1f]) &&
816 (h = p2[ucs & 0x3f]) < MAX_GLYPH)
817 return h;
818
819 return -4; /* not found */
820}
821
822/*
823 * This is called at sys_setup time, after memory and the console are
824 * initialized. It must be possible to call kmalloc(..., GFP_KERNEL)
825 * from this function, hence the call from sys_setup.
826 */
827void __init
828console_map_init(void)
829{
830 int i;
831
832 for (i = 0; i < MAX_NR_CONSOLES; i++)
833 if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc)
834 con_set_default_unimap(vc_cons[i].d);
835}
836