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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/bitfield.h>
27#include <linux/bits.h>
28#include <linux/module.h>
29#include <linux/kd.h>
30#include <linux/errno.h>
31#include <linux/mm.h>
32#include <linux/slab.h>
33#include <linux/init.h>
34#include <linux/tty.h>
35#include <linux/uaccess.h>
36#include <linux/console.h>
37#include <linux/consolemap.h>
38#include <linux/vt_kern.h>
39#include <linux/string.h>
40
41static unsigned short translations[][E_TABSZ] = {
42 /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
43 [LAT1_MAP] = {
44 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
45 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
46 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
47 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
48 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
49 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
50 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
51 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
52 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
53 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
54 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
55 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
56 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
57 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
58 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
59 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
60 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
61 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
62 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
63 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
64 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
65 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
66 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
67 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
68 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
69 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
70 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
71 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
72 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
73 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
74 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
75 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
76 },
77 /* VT100 graphics mapped to Unicode */
78 [GRAF_MAP] = {
79 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
80 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
81 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
82 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
83 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
84 0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f,
85 0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
86 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
87 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
88 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
89 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
90 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0,
91 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
92 0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
93 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
94 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f,
95 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
96 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
97 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
98 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
99 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
100 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
101 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
102 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
103 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
104 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
105 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
106 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
107 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
108 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
109 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
110 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
111 },
112 /* IBM Codepage 437 mapped to Unicode */
113 [IBMPC_MAP] = {
114 0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
115 0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
116 0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8,
117 0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc,
118 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
119 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
120 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
121 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
122 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
123 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
124 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
125 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
126 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
127 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
128 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
129 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
130 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
131 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
132 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
133 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
134 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
135 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
136 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
137 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
138 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
139 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
140 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
141 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
142 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
143 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
144 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
145 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
146 },
147 /* User mapping -- default to codes for direct font mapping */
148 [USER_MAP] = {
149 0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007,
150 0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f,
151 0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017,
152 0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
153 0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
154 0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f,
155 0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
156 0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f,
157 0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047,
158 0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f,
159 0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057,
160 0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f,
161 0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067,
162 0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f,
163 0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077,
164 0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f,
165 0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087,
166 0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f,
167 0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097,
168 0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f,
169 0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7,
170 0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af,
171 0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7,
172 0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf,
173 0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7,
174 0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf,
175 0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7,
176 0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df,
177 0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7,
178 0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef,
179 0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7,
180 0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff
181 }
182};
183
184/* The standard kernel character-to-font mappings are not invertible
185 -- this is just a best effort. */
186
187#define MAX_GLYPH 512 /* Max possible glyph value */
188
189static enum translation_map inv_translate[MAX_NR_CONSOLES];
190
191#define UNI_DIRS 32U
192#define UNI_DIR_ROWS 32U
193#define UNI_ROW_GLYPHS 64U
194
195#define UNI_DIR_BITS GENMASK(15, 11)
196#define UNI_ROW_BITS GENMASK(10, 6)
197#define UNI_GLYPH_BITS GENMASK( 5, 0)
198
199#define UNI_DIR(uni) FIELD_GET(UNI_DIR_BITS, (uni))
200#define UNI_ROW(uni) FIELD_GET(UNI_ROW_BITS, (uni))
201#define UNI_GLYPH(uni) FIELD_GET(UNI_GLYPH_BITS, (uni))
202
203#define UNI(dir, row, glyph) (FIELD_PREP(UNI_DIR_BITS, (dir)) | \
204 FIELD_PREP(UNI_ROW_BITS, (row)) | \
205 FIELD_PREP(UNI_GLYPH_BITS, (glyph)))
206
207/**
208 * struct uni_pagedict - unicode directory
209 *
210 * @uni_pgdir: 32*32*64 table with glyphs
211 * @refcount: reference count of this structure
212 * @sum: checksum
213 * @inverse_translations: best-effort inverse mapping
214 * @inverse_trans_unicode: best-effort inverse mapping to unicode
215 */
216struct uni_pagedict {
217 u16 **uni_pgdir[UNI_DIRS];
218 unsigned long refcount;
219 unsigned long sum;
220 unsigned char *inverse_translations[LAST_MAP + 1];
221 u16 *inverse_trans_unicode;
222};
223
224static struct uni_pagedict *dflt;
225
226static void set_inverse_transl(struct vc_data *conp, struct uni_pagedict *dict,
227 enum translation_map m)
228{
229 unsigned short *t = translations[m];
230 unsigned char *inv;
231
232 if (!dict)
233 return;
234 inv = dict->inverse_translations[m];
235
236 if (!inv) {
237 inv = dict->inverse_translations[m] = kmalloc(MAX_GLYPH,
238 GFP_KERNEL);
239 if (!inv)
240 return;
241 }
242 memset(inv, 0, MAX_GLYPH);
243
244 for (unsigned int ch = 0; ch < ARRAY_SIZE(translations[m]); ch++) {
245 int glyph = conv_uni_to_pc(conp, t[ch]);
246 if (glyph >= 0 && glyph < MAX_GLYPH && inv[glyph] < 32) {
247 /* prefer '-' above SHY etc. */
248 inv[glyph] = ch;
249 }
250 }
251}
252
253static void set_inverse_trans_unicode(struct uni_pagedict *dict)
254{
255 unsigned int d, r, g;
256 u16 *inv;
257
258 if (!dict)
259 return;
260
261 inv = dict->inverse_trans_unicode;
262 if (!inv) {
263 inv = dict->inverse_trans_unicode = kmalloc_array(MAX_GLYPH,
264 sizeof(*inv), GFP_KERNEL);
265 if (!inv)
266 return;
267 }
268 memset(inv, 0, MAX_GLYPH * sizeof(*inv));
269
270 for (d = 0; d < UNI_DIRS; d++) {
271 u16 **dir = dict->uni_pgdir[d];
272 if (!dir)
273 continue;
274 for (r = 0; r < UNI_DIR_ROWS; r++) {
275 u16 *row = dir[r];
276 if (!row)
277 continue;
278 for (g = 0; g < UNI_ROW_GLYPHS; g++) {
279 u16 glyph = row[g];
280 if (glyph < MAX_GLYPH && inv[glyph] < 32)
281 inv[glyph] = UNI(d, r, g);
282 }
283 }
284 }
285}
286
287unsigned short *set_translate(enum translation_map m, struct vc_data *vc)
288{
289 inv_translate[vc->vc_num] = m;
290 return translations[m];
291}
292
293/*
294 * Inverse translation is impossible for several reasons:
295 * 1. The font<->character maps are not 1-1.
296 * 2. The text may have been written while a different translation map
297 * was active.
298 * Still, it is now possible to a certain extent to cut and paste non-ASCII.
299 */
300u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode)
301{
302 struct uni_pagedict *p;
303 enum translation_map m;
304
305 if (glyph >= MAX_GLYPH)
306 return 0;
307
308 p = *conp->uni_pagedict_loc;
309 if (!p)
310 return glyph;
311
312 if (use_unicode) {
313 if (!p->inverse_trans_unicode)
314 return glyph;
315
316 return p->inverse_trans_unicode[glyph];
317 }
318
319 m = inv_translate[conp->vc_num];
320 if (!p->inverse_translations[m])
321 return glyph;
322
323 return p->inverse_translations[m][glyph];
324}
325EXPORT_SYMBOL_GPL(inverse_translate);
326
327static void update_user_maps(void)
328{
329 int i;
330 struct uni_pagedict *p, *q = NULL;
331
332 for (i = 0; i < MAX_NR_CONSOLES; i++) {
333 if (!vc_cons_allocated(i))
334 continue;
335 p = *vc_cons[i].d->uni_pagedict_loc;
336 if (p && p != q) {
337 set_inverse_transl(vc_cons[i].d, p, USER_MAP);
338 set_inverse_trans_unicode(p);
339 q = p;
340 }
341 }
342}
343
344/*
345 * Load customizable translation table
346 * arg points to a 256 byte translation table.
347 *
348 * The "old" variants are for translation directly to font (using the
349 * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set
350 * Unicodes explicitly.
351 */
352int con_set_trans_old(unsigned char __user * arg)
353{
354 unsigned short inbuf[E_TABSZ];
355 unsigned int i;
356 unsigned char ch;
357
358 for (i = 0; i < ARRAY_SIZE(inbuf); i++) {
359 if (get_user(ch, &arg[i]))
360 return -EFAULT;
361 inbuf[i] = UNI_DIRECT_BASE | ch;
362 }
363
364 console_lock();
365 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
366 update_user_maps();
367 console_unlock();
368 return 0;
369}
370
371int con_get_trans_old(unsigned char __user * arg)
372{
373 int i, ch;
374 unsigned short *p = translations[USER_MAP];
375 unsigned char outbuf[E_TABSZ];
376
377 console_lock();
378 for (i = 0; i < ARRAY_SIZE(outbuf); i++)
379 {
380 ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
381 outbuf[i] = (ch & ~0xff) ? 0 : ch;
382 }
383 console_unlock();
384
385 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
386}
387
388int con_set_trans_new(ushort __user * arg)
389{
390 unsigned short inbuf[E_TABSZ];
391
392 if (copy_from_user(inbuf, arg, sizeof(inbuf)))
393 return -EFAULT;
394
395 console_lock();
396 memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
397 update_user_maps();
398 console_unlock();
399 return 0;
400}
401
402int con_get_trans_new(ushort __user * arg)
403{
404 unsigned short outbuf[E_TABSZ];
405
406 console_lock();
407 memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
408 console_unlock();
409
410 return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
411}
412
413/*
414 * Unicode -> current font conversion
415 *
416 * A font has at most 512 chars, usually 256.
417 * But one font position may represent several Unicode chars.
418 * A hashtable is somewhat of a pain to deal with, so use a
419 * "paged table" instead. Simulation has shown the memory cost of
420 * this 3-level paged table scheme to be comparable to a hash table.
421 */
422
423extern u8 dfont_unicount[]; /* Defined in console_defmap.c */
424extern u16 dfont_unitable[];
425
426static void con_release_unimap(struct uni_pagedict *dict)
427{
428 unsigned int d, r;
429
430 if (dict == dflt)
431 dflt = NULL;
432
433 for (d = 0; d < UNI_DIRS; d++) {
434 u16 **dir = dict->uni_pgdir[d];
435 if (dir != NULL) {
436 for (r = 0; r < UNI_DIR_ROWS; r++)
437 kfree(dir[r]);
438 kfree(dir);
439 }
440 dict->uni_pgdir[d] = NULL;
441 }
442
443 for (r = 0; r < ARRAY_SIZE(dict->inverse_translations); r++) {
444 kfree(dict->inverse_translations[r]);
445 dict->inverse_translations[r] = NULL;
446 }
447
448 kfree(dict->inverse_trans_unicode);
449 dict->inverse_trans_unicode = NULL;
450}
451
452/* Caller must hold the console lock */
453void con_free_unimap(struct vc_data *vc)
454{
455 struct uni_pagedict *p;
456
457 p = *vc->uni_pagedict_loc;
458 if (!p)
459 return;
460 *vc->uni_pagedict_loc = NULL;
461 if (--p->refcount)
462 return;
463 con_release_unimap(p);
464 kfree(p);
465}
466
467static int con_unify_unimap(struct vc_data *conp, struct uni_pagedict *dict1)
468{
469 struct uni_pagedict *dict2;
470 unsigned int cons, d, r;
471
472 for (cons = 0; cons < MAX_NR_CONSOLES; cons++) {
473 if (!vc_cons_allocated(cons))
474 continue;
475 dict2 = *vc_cons[cons].d->uni_pagedict_loc;
476 if (!dict2 || dict2 == dict1 || dict2->sum != dict1->sum)
477 continue;
478 for (d = 0; d < UNI_DIRS; d++) {
479 u16 **dir1 = dict1->uni_pgdir[d];
480 u16 **dir2 = dict2->uni_pgdir[d];
481 if (!dir1 && !dir2)
482 continue;
483 if (!dir1 || !dir2)
484 break;
485 for (r = 0; r < UNI_DIR_ROWS; r++) {
486 if (!dir1[r] && !dir2[r])
487 continue;
488 if (!dir1[r] || !dir2[r])
489 break;
490 if (memcmp(dir1[r], dir2[r], UNI_ROW_GLYPHS *
491 sizeof(*dir1[r])))
492 break;
493 }
494 if (r < UNI_DIR_ROWS)
495 break;
496 }
497 if (d == UNI_DIRS) {
498 dict2->refcount++;
499 *conp->uni_pagedict_loc = dict2;
500 con_release_unimap(dict1);
501 kfree(dict1);
502 return 1;
503 }
504 }
505 return 0;
506}
507
508static int
509con_insert_unipair(struct uni_pagedict *p, u_short unicode, u_short fontpos)
510{
511 u16 **dir, *row;
512 unsigned int n;
513
514 n = UNI_DIR(unicode);
515 dir = p->uni_pgdir[n];
516 if (!dir) {
517 dir = p->uni_pgdir[n] = kcalloc(UNI_DIR_ROWS, sizeof(*dir),
518 GFP_KERNEL);
519 if (!dir)
520 return -ENOMEM;
521 }
522
523 n = UNI_ROW(unicode);
524 row = dir[n];
525 if (!row) {
526 row = dir[n] = kmalloc_array(UNI_ROW_GLYPHS, sizeof(*row),
527 GFP_KERNEL);
528 if (!row)
529 return -ENOMEM;
530 /* No glyphs for the characters (yet) */
531 memset(row, 0xff, UNI_ROW_GLYPHS * sizeof(*row));
532 }
533
534 row[UNI_GLYPH(unicode)] = fontpos;
535
536 p->sum += (fontpos << 20U) + unicode;
537
538 return 0;
539}
540
541static int con_allocate_new(struct vc_data *vc)
542{
543 struct uni_pagedict *new, *old = *vc->uni_pagedict_loc;
544
545 new = kzalloc(sizeof(*new), GFP_KERNEL);
546 if (!new)
547 return -ENOMEM;
548
549 new->refcount = 1;
550 *vc->uni_pagedict_loc = new;
551
552 if (old)
553 old->refcount--;
554
555 return 0;
556}
557
558/* Caller must hold the lock */
559static int con_do_clear_unimap(struct vc_data *vc)
560{
561 struct uni_pagedict *old = *vc->uni_pagedict_loc;
562
563 if (!old || old->refcount > 1)
564 return con_allocate_new(vc);
565
566 old->sum = 0;
567 con_release_unimap(old);
568
569 return 0;
570}
571
572int con_clear_unimap(struct vc_data *vc)
573{
574 int ret;
575 console_lock();
576 ret = con_do_clear_unimap(vc);
577 console_unlock();
578 return ret;
579}
580
581static struct uni_pagedict *con_unshare_unimap(struct vc_data *vc,
582 struct uni_pagedict *old)
583{
584 struct uni_pagedict *new;
585 unsigned int d, r, g;
586 int ret;
587 u16 uni = 0;
588
589 ret = con_allocate_new(vc);
590 if (ret)
591 return ERR_PTR(ret);
592
593 new = *vc->uni_pagedict_loc;
594
595 /*
596 * uni_pgdir is a 32*32*64 table with rows allocated when its first
597 * entry is added. The unicode value must still be incremented for
598 * empty rows. We are copying entries from "old" to "new".
599 */
600 for (d = 0; d < UNI_DIRS; d++) {
601 u16 **dir = old->uni_pgdir[d];
602 if (!dir) {
603 /* Account for empty table */
604 uni += UNI_DIR_ROWS * UNI_ROW_GLYPHS;
605 continue;
606 }
607
608 for (r = 0; r < UNI_DIR_ROWS; r++) {
609 u16 *row = dir[r];
610 if (!row) {
611 /* Account for row of 64 empty entries */
612 uni += UNI_ROW_GLYPHS;
613 continue;
614 }
615
616 for (g = 0; g < UNI_ROW_GLYPHS; g++, uni++) {
617 if (row[g] == 0xffff)
618 continue;
619 /*
620 * Found one, copy entry for unicode uni with
621 * fontpos value row[g].
622 */
623 ret = con_insert_unipair(new, uni, row[g]);
624 if (ret) {
625 old->refcount++;
626 *vc->uni_pagedict_loc = old;
627 con_release_unimap(new);
628 kfree(new);
629 return ERR_PTR(ret);
630 }
631 }
632 }
633 }
634
635 return new;
636}
637
638int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
639{
640 int err = 0, err1;
641 struct uni_pagedict *dict;
642 struct unipair *unilist, *plist;
643
644 if (!ct)
645 return 0;
646
647 unilist = vmemdup_array_user(list, ct, sizeof(*unilist));
648 if (IS_ERR(unilist))
649 return PTR_ERR(unilist);
650
651 console_lock();
652
653 /* Save original vc_unipagdir_loc in case we allocate a new one */
654 dict = *vc->uni_pagedict_loc;
655 if (!dict) {
656 err = -EINVAL;
657 goto out_unlock;
658 }
659
660 if (dict->refcount > 1) {
661 dict = con_unshare_unimap(vc, dict);
662 if (IS_ERR(dict)) {
663 err = PTR_ERR(dict);
664 goto out_unlock;
665 }
666 } else if (dict == dflt) {
667 dflt = NULL;
668 }
669
670 /*
671 * Insert user specified unicode pairs into new table.
672 */
673 for (plist = unilist; ct; ct--, plist++) {
674 err1 = con_insert_unipair(dict, plist->unicode, plist->fontpos);
675 if (err1)
676 err = err1;
677 }
678
679 /*
680 * Merge with fontmaps of any other virtual consoles.
681 */
682 if (con_unify_unimap(vc, dict))
683 goto out_unlock;
684
685 for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++)
686 set_inverse_transl(vc, dict, m);
687 set_inverse_trans_unicode(dict);
688
689out_unlock:
690 console_unlock();
691 kvfree(unilist);
692 return err;
693}
694
695/**
696 * con_set_default_unimap - set default unicode map
697 * @vc: the console we are updating
698 *
699 * Loads the unimap for the hardware font, as defined in uni_hash.tbl.
700 * The representation used was the most compact I could come up
701 * with. This routine is executed at video setup, and when the
702 * PIO_FONTRESET ioctl is called.
703 *
704 * The caller must hold the console lock
705 */
706int con_set_default_unimap(struct vc_data *vc)
707{
708 struct uni_pagedict *dict;
709 unsigned int fontpos, count;
710 int err = 0, err1;
711 u16 *dfont;
712
713 if (dflt) {
714 dict = *vc->uni_pagedict_loc;
715 if (dict == dflt)
716 return 0;
717
718 dflt->refcount++;
719 *vc->uni_pagedict_loc = dflt;
720 if (dict && !--dict->refcount) {
721 con_release_unimap(dict);
722 kfree(dict);
723 }
724 return 0;
725 }
726
727 /* The default font is always 256 characters */
728
729 err = con_do_clear_unimap(vc);
730 if (err)
731 return err;
732
733 dict = *vc->uni_pagedict_loc;
734 dfont = dfont_unitable;
735
736 for (fontpos = 0; fontpos < 256U; fontpos++)
737 for (count = dfont_unicount[fontpos]; count; count--) {
738 err1 = con_insert_unipair(dict, *(dfont++), fontpos);
739 if (err1)
740 err = err1;
741 }
742
743 if (con_unify_unimap(vc, dict)) {
744 dflt = *vc->uni_pagedict_loc;
745 return err;
746 }
747
748 for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++)
749 set_inverse_transl(vc, dict, m);
750 set_inverse_trans_unicode(dict);
751 dflt = dict;
752 return err;
753}
754EXPORT_SYMBOL(con_set_default_unimap);
755
756/**
757 * con_copy_unimap - copy unimap between two vts
758 * @dst_vc: target
759 * @src_vc: source
760 *
761 * The caller must hold the console lock when invoking this method
762 */
763int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
764{
765 struct uni_pagedict *src;
766
767 if (!*src_vc->uni_pagedict_loc)
768 return -EINVAL;
769 if (*dst_vc->uni_pagedict_loc == *src_vc->uni_pagedict_loc)
770 return 0;
771 con_free_unimap(dst_vc);
772 src = *src_vc->uni_pagedict_loc;
773 src->refcount++;
774 *dst_vc->uni_pagedict_loc = src;
775 return 0;
776}
777EXPORT_SYMBOL(con_copy_unimap);
778
779/*
780 * con_get_unimap - get the unicode map
781 *
782 * Read the console unicode data for this console. Called from the ioctl
783 * handlers.
784 */
785int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
786 struct unipair __user *list)
787{
788 ushort ect;
789 struct uni_pagedict *dict;
790 struct unipair *unilist;
791 unsigned int d, r, g;
792 int ret = 0;
793
794 unilist = kvmalloc_array(ct, sizeof(*unilist), GFP_KERNEL);
795 if (!unilist)
796 return -ENOMEM;
797
798 console_lock();
799
800 ect = 0;
801 dict = *vc->uni_pagedict_loc;
802 if (!dict)
803 goto unlock;
804
805 for (d = 0; d < UNI_DIRS; d++) {
806 u16 **dir = dict->uni_pgdir[d];
807 if (!dir)
808 continue;
809
810 for (r = 0; r < UNI_DIR_ROWS; r++) {
811 u16 *row = dir[r];
812 if (!row)
813 continue;
814
815 for (g = 0; g < UNI_ROW_GLYPHS; g++, row++) {
816 if (*row >= MAX_GLYPH)
817 continue;
818 if (ect < ct) {
819 unilist[ect].unicode = UNI(d, r, g);
820 unilist[ect].fontpos = *row;
821 }
822 ect++;
823 }
824 }
825 }
826unlock:
827 console_unlock();
828 if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist)))
829 ret = -EFAULT;
830 if (put_user(ect, uct))
831 ret = -EFAULT;
832 kvfree(unilist);
833 return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
834}
835
836/*
837 * Always use USER_MAP. These functions are used by the keyboard,
838 * which shouldn't be affected by G0/G1 switching, etc.
839 * If the user map still contains default values, i.e. the
840 * direct-to-font mapping, then assume user is using Latin1.
841 *
842 * FIXME: at some point we need to decide if we want to lock the table
843 * update element itself via the keyboard_event_lock for consistency with the
844 * keyboard driver as well as the consoles
845 */
846/* may be called during an interrupt */
847u32 conv_8bit_to_uni(unsigned char c)
848{
849 unsigned short uni = translations[USER_MAP][c];
850 return uni == (0xf000 | c) ? c : uni;
851}
852
853int conv_uni_to_8bit(u32 uni)
854{
855 int c;
856 for (c = 0; c < ARRAY_SIZE(translations[USER_MAP]); c++)
857 if (translations[USER_MAP][c] == uni ||
858 (translations[USER_MAP][c] == (c | 0xf000) && uni == c))
859 return c;
860 return -1;
861}
862
863int conv_uni_to_pc(struct vc_data *conp, long ucs)
864{
865 struct uni_pagedict *dict;
866 u16 **dir, *row, glyph;
867
868 /* Only 16-bit codes supported at this time */
869 if (ucs > 0xffff)
870 return -4; /* Not found */
871 else if (ucs < 0x20)
872 return -1; /* Not a printable character */
873 else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f))
874 return -2; /* Zero-width space */
875 /*
876 * UNI_DIRECT_BASE indicates the start of the region in the User Zone
877 * which always has a 1:1 mapping to the currently loaded font. The
878 * UNI_DIRECT_MASK indicates the bit span of the region.
879 */
880 else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
881 return ucs & UNI_DIRECT_MASK;
882
883 dict = *conp->uni_pagedict_loc;
884 if (!dict)
885 return -3;
886
887 dir = dict->uni_pgdir[UNI_DIR(ucs)];
888 if (!dir)
889 return -4;
890
891 row = dir[UNI_ROW(ucs)];
892 if (!row)
893 return -4;
894
895 glyph = row[UNI_GLYPH(ucs)];
896 if (glyph >= MAX_GLYPH)
897 return -4;
898
899 return glyph;
900}
901
902/*
903 * This is called at sys_setup time, after memory and the console are
904 * initialized. It must be possible to call kmalloc(..., GFP_KERNEL)
905 * from this function, hence the call from sys_setup.
906 */
907void __init
908console_map_init(void)
909{
910 int i;
911
912 for (i = 0; i < MAX_NR_CONSOLES; i++)
913 if (vc_cons_allocated(i) && !*vc_cons[i].d->uni_pagedict_loc)
914 con_set_default_unimap(vc_cons[i].d);
915}
916
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