summaryrefslogtreecommitdiff
path: root/drivers/char/consolemap.c
blob: b99b7561260dca1eeea4472bb95f3a087c9f688a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
/*
 * consolemap.c
 *
 * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code)
 * to font positions.
 *
 * aeb, 950210
 *
 * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998
 *
 * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998
 */

#include <linux/module.h>
#include <linux/kd.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <asm/uaccess.h>
#include <linux/consolemap.h>
#include <linux/vt_kern.h>

static unsigned short translations[][256] = {
  /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
  {
    0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
    0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
    0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
    0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
    0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
    0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
    0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
    0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
    0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
    0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
    0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
    0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
    0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
    0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
    0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
    0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
    0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
    0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
    0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
    0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
    0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
    0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
  }, 
  /* VT100 graphics mapped to Unicode */
  {
    0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
    0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
    0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
    0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f,
    0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0,
    0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
    0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
    0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
    0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f,
    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
    0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
    0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
    0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
    0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
    0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
    0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
    0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
    0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
    0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
    0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
    0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
    0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
    0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
    0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
    0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
  },
  /* IBM Codepage 437 mapped to Unicode */
  {
    0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022, 
    0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
    0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8,
    0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc,
    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
    0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
    0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
    0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
    0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
    0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
    0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
    0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
    0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
    0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
    0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
    0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
    0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
    0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
    0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
    0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
    0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
    0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
    0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
    0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
  }, 
  /* User mapping -- default to codes for direct font mapping */
  {
    0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007,
    0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f,
    0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017,
    0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
    0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
    0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f,
    0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
    0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f,
    0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047,
    0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f,
    0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057,
    0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f,
    0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067,
    0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f,
    0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077,
    0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f,
    0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087,
    0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f,
    0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097,
    0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f,
    0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7,
    0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af,
    0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7,
    0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf,
    0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7,
    0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf,
    0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7,
    0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df,
    0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7,
    0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef,
    0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7,
    0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff
  }
};

/* The standard kernel character-to-font mappings are not invertible
   -- this is just a best effort. */

#define MAX_GLYPH 512		/* Max possible glyph value */

static int inv_translate[MAX_NR_CONSOLES];

struct uni_pagedir {
	u16 		**uni_pgdir[32];
	unsigned long	refcount;
	unsigned long	sum;
	unsigned char	*inverse_translations[4];
	int		readonly;
};

static struct uni_pagedir *dflt;

static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int i)
{
	int j, glyph;
	unsigned short *t = translations[i];
	unsigned char *q;
	
	if (!p) return;
	q = p->inverse_translations[i];

	if (!q) {
		q = p->inverse_translations[i] = (unsigned char *) 
			kmalloc(MAX_GLYPH, GFP_KERNEL);
		if (!q) return;
	}
	memset(q, 0, MAX_GLYPH);

	for (j = 0; j < E_TABSZ; j++) {
		glyph = conv_uni_to_pc(conp, t[j]);
		if (glyph >= 0 && glyph < MAX_GLYPH && q[glyph] < 32) {
			/* prefer '-' above SHY etc. */
		  	q[glyph] = j;
		}
	}
}

unsigned short *set_translate(int m, struct vc_data *vc)
{
	inv_translate[vc->vc_num] = m;
	return translations[m];
}

/*
 * Inverse translation is impossible for several reasons:
 * 1. The font<->character maps are not 1-1.
 * 2. The text may have been written while a different translation map
 *    was active, or using Unicode.
 * Still, it is now possible to a certain extent to cut and paste non-ASCII.
 */
unsigned char inverse_translate(struct vc_data *conp, int glyph)
{
	struct uni_pagedir *p;
	if (glyph < 0 || glyph >= MAX_GLYPH)
		return 0;
	else if (!(p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc) ||
		 !p->inverse_translations[inv_translate[conp->vc_num]])
		return glyph;
	else
		return p->inverse_translations[inv_translate[conp->vc_num]][glyph];
}

static void update_user_maps(void)
{
	int i;
	struct uni_pagedir *p, *q = NULL;
	
	for (i = 0; i < MAX_NR_CONSOLES; i++) {
		if (!vc_cons_allocated(i))
			continue;
		p = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc;
		if (p && p != q) {
			set_inverse_transl(vc_cons[i].d, p, USER_MAP);
			q = p;
		}
	}
}

/*
 * Load customizable translation table
 * arg points to a 256 byte translation table.
 *
 * The "old" variants are for translation directly to font (using the
 * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set
 * Unicodes explicitly.
 */
int con_set_trans_old(unsigned char __user * arg)
{
	int i;
	unsigned short *p = translations[USER_MAP];

	if (!access_ok(VERIFY_READ, arg, E_TABSZ))
		return -EFAULT;

	for (i=0; i<E_TABSZ ; i++) {
		unsigned char uc;
		__get_user(uc, arg+i);
		p[i] = UNI_DIRECT_BASE | uc;
	}

	update_user_maps();
	return 0;
}

int con_get_trans_old(unsigned char __user * arg)
{
	int i, ch;
	unsigned short *p = translations[USER_MAP];

	if (!access_ok(VERIFY_WRITE, arg, E_TABSZ))
		return -EFAULT;

	for (i=0; i<E_TABSZ ; i++)
	  {
	    ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
	    __put_user((ch & ~0xff) ? 0 : ch, arg+i);
	  }
	return 0;
}

int con_set_trans_new(ushort __user * arg)
{
	int i;
	unsigned short *p = translations[USER_MAP];

	if (!access_ok(VERIFY_READ, arg, E_TABSZ*sizeof(unsigned short)))
		return -EFAULT;

	for (i=0; i<E_TABSZ ; i++) {
		unsigned short us;
		__get_user(us, arg+i);
		p[i] = us;
	}

	update_user_maps();
	return 0;
}

int con_get_trans_new(ushort __user * arg)
{
	int i;
	unsigned short *p = translations[USER_MAP];

	if (!access_ok(VERIFY_WRITE, arg, E_TABSZ*sizeof(unsigned short)))
		return -EFAULT;

	for (i=0; i<E_TABSZ ; i++)
	  __put_user(p[i], arg+i);
	
	return 0;
}

/*
 * Unicode -> current font conversion 
 *
 * A font has at most 512 chars, usually 256.
 * But one font position may represent several Unicode chars.
 * A hashtable is somewhat of a pain to deal with, so use a
 * "paged table" instead.  Simulation has shown the memory cost of
 * this 3-level paged table scheme to be comparable to a hash table.
 */

extern u8 dfont_unicount[];	/* Defined in console_defmap.c */
extern u16 dfont_unitable[];

static void con_release_unimap(struct uni_pagedir *p)
{
	u16 **p1;
	int i, j;

	if (p == dflt) dflt = NULL;  
	for (i = 0; i < 32; i++) {
		if ((p1 = p->uni_pgdir[i]) != NULL) {
			for (j = 0; j < 32; j++)
				kfree(p1[j]);
			kfree(p1);
		}
		p->uni_pgdir[i] = NULL;
	}
	for (i = 0; i < 4; i++) {
		kfree(p->inverse_translations[i]);
		p->inverse_translations[i] = NULL;
	}
}

void con_free_unimap(struct vc_data *vc)
{
	struct uni_pagedir *p;

	p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
	if (!p)
		return;
	*vc->vc_uni_pagedir_loc = 0;
	if (--p->refcount)
		return;
	con_release_unimap(p);
	kfree(p);
}
  
static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p)
{
	int i, j, k;
	struct uni_pagedir *q;
	
	for (i = 0; i < MAX_NR_CONSOLES; i++) {
		if (!vc_cons_allocated(i))
			continue;
		q = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc;
		if (!q || q == p || q->sum != p->sum)
			continue;
		for (j = 0; j < 32; j++) {
			u16 **p1, **q1;
			p1 = p->uni_pgdir[j]; q1 = q->uni_pgdir[j];
			if (!p1 && !q1)
				continue;
			if (!p1 || !q1)
				break;
			for (k = 0; k < 32; k++) {
				if (!p1[k] && !q1[k])
					continue;
				if (!p1[k] || !q1[k])
					break;
				if (memcmp(p1[k], q1[k], 64*sizeof(u16)))
					break;
			}
			if (k < 32)
				break;
		}
		if (j == 32) {
			q->refcount++;
			*conp->vc_uni_pagedir_loc = (unsigned long)q;
			con_release_unimap(p);
			kfree(p);
			return 1;
		}
	}
	return 0;
}

static int
con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
{
	int i, n;
	u16 **p1, *p2;

	if (!(p1 = p->uni_pgdir[n = unicode >> 11])) {
		p1 = p->uni_pgdir[n] = kmalloc(32*sizeof(u16 *), GFP_KERNEL);
		if (!p1) return -ENOMEM;
		for (i = 0; i < 32; i++)
			p1[i] = NULL;
	}

	if (!(p2 = p1[n = (unicode >> 6) & 0x1f])) {
		p2 = p1[n] = kmalloc(64*sizeof(u16), GFP_KERNEL);
		if (!p2) return -ENOMEM;
		memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */
	}

	p2[unicode & 0x3f] = fontpos;
	
	p->sum += (fontpos << 20) + unicode;

	return 0;
}

/* ui is a leftover from using a hashtable, but might be used again */
int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
{
	struct uni_pagedir *p, *q;
  
	p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
	if (p && p->readonly) return -EIO;
	if (!p || --p->refcount) {
		q = kmalloc(sizeof(*p), GFP_KERNEL);
		if (!q) {
			if (p) p->refcount++;
			return -ENOMEM;
		}
		memset(q, 0, sizeof(*q));
		q->refcount=1;
		*vc->vc_uni_pagedir_loc = (unsigned long)q;
	} else {
		if (p == dflt) dflt = NULL;
		p->refcount++;
		p->sum = 0;
		con_release_unimap(p);
	}
	return 0;
}

int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
{
	int err = 0, err1, i;
	struct uni_pagedir *p, *q;

	p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
	if (p->readonly) return -EIO;
	
	if (!ct) return 0;
	
	if (p->refcount > 1) {
		int j, k;
		u16 **p1, *p2, l;
		
		err1 = con_clear_unimap(vc, NULL);
		if (err1) return err1;
		
		q = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
		for (i = 0, l = 0; i < 32; i++)
		if ((p1 = p->uni_pgdir[i]))
			for (j = 0; j < 32; j++)
			if ((p2 = p1[j]))
				for (k = 0; k < 64; k++, l++)
				if (p2[k] != 0xffff) {
					err1 = con_insert_unipair(q, l, p2[k]);
					if (err1) {
						p->refcount++;
						*vc->vc_uni_pagedir_loc = (unsigned long)p;
						con_release_unimap(q);
						kfree(q);
						return err1; 
					}
              			}
              	p = q;
	} else if (p == dflt)
		dflt = NULL;
	
	while (ct--) {
		unsigned short unicode, fontpos;
		__get_user(unicode, &list->unicode);
		__get_user(fontpos, &list->fontpos);
		if ((err1 = con_insert_unipair(p, unicode,fontpos)) != 0)
			err = err1;
			list++;
	}
	
	if (con_unify_unimap(vc, p))
		return err;

	for (i = 0; i <= 3; i++)
		set_inverse_transl(vc, p, i); /* Update all inverse translations */
  
	return err;
}

/* Loads the unimap for the hardware font, as defined in uni_hash.tbl.
   The representation used was the most compact I could come up
   with.  This routine is executed at sys_setup time, and when the
   PIO_FONTRESET ioctl is called. */

int con_set_default_unimap(struct vc_data *vc)
{
	int i, j, err = 0, err1;
	u16 *q;
	struct uni_pagedir *p;

	if (dflt) {
		p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
		if (p == dflt)
			return 0;
		dflt->refcount++;
		*vc->vc_uni_pagedir_loc = (unsigned long)dflt;
		if (p && --p->refcount) {
			con_release_unimap(p);
			kfree(p);
		}
		return 0;
	}
	
	/* The default font is always 256 characters */

	err = con_clear_unimap(vc, NULL);
	if (err) return err;
    
	p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
	q = dfont_unitable;
	
	for (i = 0; i < 256; i++)
		for (j = dfont_unicount[i]; j; j--) {
			err1 = con_insert_unipair(p, *(q++), i);
			if (err1)
				err = err1;
		}
			
	if (con_unify_unimap(vc, p)) {
		dflt = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
		return err;
	}

	for (i = 0; i <= 3; i++)
		set_inverse_transl(vc, p, i);	/* Update all inverse translations */
	dflt = p;
	return err;
}
EXPORT_SYMBOL(con_set_default_unimap);

int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
{
	struct uni_pagedir *q;

	if (!*src_vc->vc_uni_pagedir_loc)
		return -EINVAL;
	if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc)
		return 0;
	con_free_unimap(dst_vc);
	q = (struct uni_pagedir *)*src_vc->vc_uni_pagedir_loc;
	q->refcount++;
	*dst_vc->vc_uni_pagedir_loc = (long)q;
	return 0;
}

int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list)
{
	int i, j, k, ect;
	u16 **p1, *p2;
	struct uni_pagedir *p;

	ect = 0;
	if (*vc->vc_uni_pagedir_loc) {
		p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
		for (i = 0; i < 32; i++)
		if ((p1 = p->uni_pgdir[i]))
			for (j = 0; j < 32; j++)
			if ((p2 = *(p1++)))
				for (k = 0; k < 64; k++) {
					if (*p2 < MAX_GLYPH && ect++ < ct) {
						__put_user((u_short)((i<<11)+(j<<6)+k),
							   &list->unicode);
						__put_user((u_short) *p2, 
							   &list->fontpos);
						list++;
					}
					p2++;
				}
	}
	__put_user(ect, uct);
	return ((ect <= ct) ? 0 : -ENOMEM);
}

void con_protect_unimap(struct vc_data *vc, int rdonly)
{
	struct uni_pagedir *p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
	
	if (p)
		p->readonly = rdonly;
}

int
conv_uni_to_pc(struct vc_data *conp, long ucs) 
{
	int h;
	u16 **p1, *p2;
	struct uni_pagedir *p;
  
	/* Only 16-bit codes supported at this time */
	if (ucs > 0xffff)
		ucs = 0xfffd;		/* U+FFFD: REPLACEMENT CHARACTER */
	else if (ucs < 0x20 || ucs >= 0xfffe)
		return -1;		/* Not a printable character */
	else if (ucs == 0xfeff || (ucs >= 0x200a && ucs <= 0x200f))
		return -2;			/* Zero-width space */
	/*
	 * UNI_DIRECT_BASE indicates the start of the region in the User Zone
	 * which always has a 1:1 mapping to the currently loaded font.  The
	 * UNI_DIRECT_MASK indicates the bit span of the region.
	 */
	else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
		return ucs & UNI_DIRECT_MASK;
  
	if (!*conp->vc_uni_pagedir_loc)
		return -3;

	p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc;  
	if ((p1 = p->uni_pgdir[ucs >> 11]) &&
	    (p2 = p1[(ucs >> 6) & 0x1f]) &&
	    (h = p2[ucs & 0x3f]) < MAX_GLYPH)
		return h;

	return -4;		/* not found */
}

/*
 * This is called at sys_setup time, after memory and the console are
 * initialized.  It must be possible to call kmalloc(..., GFP_KERNEL)
 * from this function, hence the call from sys_setup.
 */
void __init 
console_map_init(void)
{
	int i;
	
	for (i = 0; i < MAX_NR_CONSOLES; i++)
		if (vc_cons_allocated(i) && !*vc_cons[i].d->vc_uni_pagedir_loc)
			con_set_default_unimap(vc_cons[i].d);
}

EXPORT_SYMBOL(con_copy_unimap);