917 lines
26 KiB
C
917 lines
26 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* consolemap.c
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*
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* Mapping from internal code (such as Latin-1 or Unicode or IBM PC code)
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* to font positions.
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*
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* aeb, 950210
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*
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* Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998
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*
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* Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998
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*
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* In order to prevent the following circular lock dependency:
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* &mm->mmap_lock --> cpu_hotplug.lock --> console_lock --> &mm->mmap_lock
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*
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* We cannot allow page fault to happen while holding the console_lock.
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* Therefore, all the userspace copy operations have to be done outside
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* the console_lock critical sections.
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*
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* As all the affected functions are all called directly from vt_ioctl(), we
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* can allocate some small buffers directly on stack without worrying about
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* stack overflow.
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*/
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#include <linux/bitfield.h>
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#include <linux/bits.h>
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#include <linux/module.h>
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#include <linux/kd.h>
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/tty.h>
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#include <linux/uaccess.h>
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#include <linux/console.h>
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#include <linux/consolemap.h>
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#include <linux/vt_kern.h>
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#include <linux/string.h>
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static unsigned short translations[][E_TABSZ] = {
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/* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
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[LAT1_MAP] = {
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0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
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0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
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0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
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0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
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0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
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0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
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0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
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0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
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0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
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0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
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0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
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0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
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0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
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0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
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0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
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0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
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0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
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0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
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0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
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0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
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0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
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0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
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0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
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0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
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0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
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0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
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0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
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0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
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0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
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0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
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0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
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0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
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},
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/* VT100 graphics mapped to Unicode */
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[GRAF_MAP] = {
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0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
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0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
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0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
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0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
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0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
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0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f,
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0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
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0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
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0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
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0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
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0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
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0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0,
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0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
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0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
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0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
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0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f,
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0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
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0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
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0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
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0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
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0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
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0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
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0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
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0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
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0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
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0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
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0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
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0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
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0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
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0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
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0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
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0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
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},
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/* IBM Codepage 437 mapped to Unicode */
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[IBMPC_MAP] = {
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0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
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0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
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0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8,
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0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc,
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0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
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0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
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0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
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0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
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0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
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0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
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0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
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0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
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0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
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0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
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0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
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0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
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0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
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0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
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0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
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0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
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0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
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0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
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0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
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0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
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0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
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0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
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0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
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0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
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0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
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0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
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0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
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0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
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},
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/* User mapping -- default to codes for direct font mapping */
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[USER_MAP] = {
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0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007,
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0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f,
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0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017,
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0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
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0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
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0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f,
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0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
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0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f,
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0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047,
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0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f,
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0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057,
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0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f,
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0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067,
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0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f,
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0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077,
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0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f,
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0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087,
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0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f,
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0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097,
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0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f,
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0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7,
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0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af,
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0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7,
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0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf,
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0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7,
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0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf,
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0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7,
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0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df,
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0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7,
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0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef,
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0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7,
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0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff
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}
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};
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/* 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 enum translation_map inv_translate[MAX_NR_CONSOLES];
|
||
|
|
|
||
|
|
#define UNI_DIRS 32U
|
||
|
|
#define UNI_DIR_ROWS 32U
|
||
|
|
#define UNI_ROW_GLYPHS 64U
|
||
|
|
|
||
|
|
#define UNI_DIR_BITS GENMASK(15, 11)
|
||
|
|
#define UNI_ROW_BITS GENMASK(10, 6)
|
||
|
|
#define UNI_GLYPH_BITS GENMASK( 5, 0)
|
||
|
|
|
||
|
|
#define UNI_DIR(uni) FIELD_GET(UNI_DIR_BITS, (uni))
|
||
|
|
#define UNI_ROW(uni) FIELD_GET(UNI_ROW_BITS, (uni))
|
||
|
|
#define UNI_GLYPH(uni) FIELD_GET(UNI_GLYPH_BITS, (uni))
|
||
|
|
|
||
|
|
#define UNI(dir, row, glyph) (FIELD_PREP(UNI_DIR_BITS, (dir)) | \
|
||
|
|
FIELD_PREP(UNI_ROW_BITS, (row)) | \
|
||
|
|
FIELD_PREP(UNI_GLYPH_BITS, (glyph)))
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct uni_pagedict -- unicode directory
|
||
|
|
*
|
||
|
|
* @uni_pgdir: 32*32*64 table with glyphs
|
||
|
|
* @refcount: reference count of this structure
|
||
|
|
* @sum: checksum
|
||
|
|
* @inverse_translations: best-effort inverse mapping
|
||
|
|
* @inverse_trans_unicode: best-effort inverse mapping to unicode
|
||
|
|
*/
|
||
|
|
struct uni_pagedict {
|
||
|
|
u16 **uni_pgdir[UNI_DIRS];
|
||
|
|
unsigned long refcount;
|
||
|
|
unsigned long sum;
|
||
|
|
unsigned char *inverse_translations[LAST_MAP + 1];
|
||
|
|
u16 *inverse_trans_unicode;
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct uni_pagedict *dflt;
|
||
|
|
|
||
|
|
static void set_inverse_transl(struct vc_data *conp, struct uni_pagedict *dict,
|
||
|
|
enum translation_map m)
|
||
|
|
{
|
||
|
|
unsigned short *t = translations[m];
|
||
|
|
unsigned char *inv;
|
||
|
|
|
||
|
|
if (!dict)
|
||
|
|
return;
|
||
|
|
inv = dict->inverse_translations[m];
|
||
|
|
|
||
|
|
if (!inv) {
|
||
|
|
inv = dict->inverse_translations[m] = kmalloc(MAX_GLYPH,
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!inv)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
memset(inv, 0, MAX_GLYPH);
|
||
|
|
|
||
|
|
for (unsigned int ch = 0; ch < ARRAY_SIZE(translations[m]); ch++) {
|
||
|
|
int glyph = conv_uni_to_pc(conp, t[ch]);
|
||
|
|
if (glyph >= 0 && glyph < MAX_GLYPH && inv[glyph] < 32) {
|
||
|
|
/* prefer '-' above SHY etc. */
|
||
|
|
inv[glyph] = ch;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void set_inverse_trans_unicode(struct uni_pagedict *dict)
|
||
|
|
{
|
||
|
|
unsigned int d, r, g;
|
||
|
|
u16 *inv;
|
||
|
|
|
||
|
|
if (!dict)
|
||
|
|
return;
|
||
|
|
|
||
|
|
inv = dict->inverse_trans_unicode;
|
||
|
|
if (!inv) {
|
||
|
|
inv = dict->inverse_trans_unicode = kmalloc_array(MAX_GLYPH,
|
||
|
|
sizeof(*inv), GFP_KERNEL);
|
||
|
|
if (!inv)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
memset(inv, 0, MAX_GLYPH * sizeof(*inv));
|
||
|
|
|
||
|
|
for (d = 0; d < UNI_DIRS; d++) {
|
||
|
|
u16 **dir = dict->uni_pgdir[d];
|
||
|
|
if (!dir)
|
||
|
|
continue;
|
||
|
|
for (r = 0; r < UNI_DIR_ROWS; r++) {
|
||
|
|
u16 *row = dir[r];
|
||
|
|
if (!row)
|
||
|
|
continue;
|
||
|
|
for (g = 0; g < UNI_ROW_GLYPHS; g++) {
|
||
|
|
u16 glyph = row[g];
|
||
|
|
if (glyph < MAX_GLYPH && inv[glyph] < 32)
|
||
|
|
inv[glyph] = UNI(d, r, g);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned short *set_translate(enum translation_map 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.
|
||
|
|
* Still, it is now possible to a certain extent to cut and paste non-ASCII.
|
||
|
|
*/
|
||
|
|
u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *p;
|
||
|
|
enum translation_map m;
|
||
|
|
|
||
|
|
if (glyph >= MAX_GLYPH)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
p = *conp->uni_pagedict_loc;
|
||
|
|
if (!p)
|
||
|
|
return glyph;
|
||
|
|
|
||
|
|
if (use_unicode) {
|
||
|
|
if (!p->inverse_trans_unicode)
|
||
|
|
return glyph;
|
||
|
|
|
||
|
|
return p->inverse_trans_unicode[glyph];
|
||
|
|
}
|
||
|
|
|
||
|
|
m = inv_translate[conp->vc_num];
|
||
|
|
if (!p->inverse_translations[m])
|
||
|
|
return glyph;
|
||
|
|
|
||
|
|
return p->inverse_translations[m][glyph];
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(inverse_translate);
|
||
|
|
|
||
|
|
static void update_user_maps(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
struct uni_pagedict *p, *q = NULL;
|
||
|
|
|
||
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
||
|
|
if (!vc_cons_allocated(i))
|
||
|
|
continue;
|
||
|
|
p = *vc_cons[i].d->uni_pagedict_loc;
|
||
|
|
if (p && p != q) {
|
||
|
|
set_inverse_transl(vc_cons[i].d, p, USER_MAP);
|
||
|
|
set_inverse_trans_unicode(p);
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
unsigned short inbuf[E_TABSZ];
|
||
|
|
unsigned int i;
|
||
|
|
unsigned char ch;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(inbuf); i++) {
|
||
|
|
if (get_user(ch, &arg[i]))
|
||
|
|
return -EFAULT;
|
||
|
|
inbuf[i] = UNI_DIRECT_BASE | ch;
|
||
|
|
}
|
||
|
|
|
||
|
|
console_lock();
|
||
|
|
memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
|
||
|
|
update_user_maps();
|
||
|
|
console_unlock();
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int con_get_trans_old(unsigned char __user * arg)
|
||
|
|
{
|
||
|
|
int i, ch;
|
||
|
|
unsigned short *p = translations[USER_MAP];
|
||
|
|
unsigned char outbuf[E_TABSZ];
|
||
|
|
|
||
|
|
console_lock();
|
||
|
|
for (i = 0; i < ARRAY_SIZE(outbuf); i++)
|
||
|
|
{
|
||
|
|
ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
|
||
|
|
outbuf[i] = (ch & ~0xff) ? 0 : ch;
|
||
|
|
}
|
||
|
|
console_unlock();
|
||
|
|
|
||
|
|
return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int con_set_trans_new(ushort __user * arg)
|
||
|
|
{
|
||
|
|
unsigned short inbuf[E_TABSZ];
|
||
|
|
|
||
|
|
if (copy_from_user(inbuf, arg, sizeof(inbuf)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
console_lock();
|
||
|
|
memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
|
||
|
|
update_user_maps();
|
||
|
|
console_unlock();
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int con_get_trans_new(ushort __user * arg)
|
||
|
|
{
|
||
|
|
unsigned short outbuf[E_TABSZ];
|
||
|
|
|
||
|
|
console_lock();
|
||
|
|
memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
|
||
|
|
console_unlock();
|
||
|
|
|
||
|
|
return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 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_pagedict *dict)
|
||
|
|
{
|
||
|
|
unsigned int d, r;
|
||
|
|
|
||
|
|
if (dict == dflt)
|
||
|
|
dflt = NULL;
|
||
|
|
|
||
|
|
for (d = 0; d < UNI_DIRS; d++) {
|
||
|
|
u16 **dir = dict->uni_pgdir[d];
|
||
|
|
if (dir != NULL) {
|
||
|
|
for (r = 0; r < UNI_DIR_ROWS; r++)
|
||
|
|
kfree(dir[r]);
|
||
|
|
kfree(dir);
|
||
|
|
}
|
||
|
|
dict->uni_pgdir[d] = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (r = 0; r < ARRAY_SIZE(dict->inverse_translations); r++) {
|
||
|
|
kfree(dict->inverse_translations[r]);
|
||
|
|
dict->inverse_translations[r] = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
kfree(dict->inverse_trans_unicode);
|
||
|
|
dict->inverse_trans_unicode = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Caller must hold the console lock */
|
||
|
|
void con_free_unimap(struct vc_data *vc)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *p;
|
||
|
|
|
||
|
|
p = *vc->uni_pagedict_loc;
|
||
|
|
if (!p)
|
||
|
|
return;
|
||
|
|
*vc->uni_pagedict_loc = NULL;
|
||
|
|
if (--p->refcount)
|
||
|
|
return;
|
||
|
|
con_release_unimap(p);
|
||
|
|
kfree(p);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int con_unify_unimap(struct vc_data *conp, struct uni_pagedict *dict1)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *dict2;
|
||
|
|
unsigned int cons, d, r;
|
||
|
|
|
||
|
|
for (cons = 0; cons < MAX_NR_CONSOLES; cons++) {
|
||
|
|
if (!vc_cons_allocated(cons))
|
||
|
|
continue;
|
||
|
|
dict2 = *vc_cons[cons].d->uni_pagedict_loc;
|
||
|
|
if (!dict2 || dict2 == dict1 || dict2->sum != dict1->sum)
|
||
|
|
continue;
|
||
|
|
for (d = 0; d < UNI_DIRS; d++) {
|
||
|
|
u16 **dir1 = dict1->uni_pgdir[d];
|
||
|
|
u16 **dir2 = dict2->uni_pgdir[d];
|
||
|
|
if (!dir1 && !dir2)
|
||
|
|
continue;
|
||
|
|
if (!dir1 || !dir2)
|
||
|
|
break;
|
||
|
|
for (r = 0; r < UNI_DIR_ROWS; r++) {
|
||
|
|
if (!dir1[r] && !dir2[r])
|
||
|
|
continue;
|
||
|
|
if (!dir1[r] || !dir2[r])
|
||
|
|
break;
|
||
|
|
if (memcmp(dir1[r], dir2[r], UNI_ROW_GLYPHS *
|
||
|
|
sizeof(*dir1[r])))
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (r < UNI_DIR_ROWS)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (d == UNI_DIRS) {
|
||
|
|
dict2->refcount++;
|
||
|
|
*conp->uni_pagedict_loc = dict2;
|
||
|
|
con_release_unimap(dict1);
|
||
|
|
kfree(dict1);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
con_insert_unipair(struct uni_pagedict *p, u_short unicode, u_short fontpos)
|
||
|
|
{
|
||
|
|
u16 **dir, *row;
|
||
|
|
unsigned int n;
|
||
|
|
|
||
|
|
n = UNI_DIR(unicode);
|
||
|
|
dir = p->uni_pgdir[n];
|
||
|
|
if (!dir) {
|
||
|
|
dir = p->uni_pgdir[n] = kcalloc(UNI_DIR_ROWS, sizeof(*dir),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!dir)
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
n = UNI_ROW(unicode);
|
||
|
|
row = dir[n];
|
||
|
|
if (!row) {
|
||
|
|
row = dir[n] = kmalloc_array(UNI_ROW_GLYPHS, sizeof(*row),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!row)
|
||
|
|
return -ENOMEM;
|
||
|
|
/* No glyphs for the characters (yet) */
|
||
|
|
memset(row, 0xff, UNI_ROW_GLYPHS * sizeof(*row));
|
||
|
|
}
|
||
|
|
|
||
|
|
row[UNI_GLYPH(unicode)] = fontpos;
|
||
|
|
|
||
|
|
p->sum += (fontpos << 20U) + unicode;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int con_allocate_new(struct vc_data *vc)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *new, *old = *vc->uni_pagedict_loc;
|
||
|
|
|
||
|
|
new = kzalloc(sizeof(*new), GFP_KERNEL);
|
||
|
|
if (!new)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
new->refcount = 1;
|
||
|
|
*vc->uni_pagedict_loc = new;
|
||
|
|
|
||
|
|
if (old)
|
||
|
|
old->refcount--;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Caller must hold the lock */
|
||
|
|
static int con_do_clear_unimap(struct vc_data *vc)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *old = *vc->uni_pagedict_loc;
|
||
|
|
|
||
|
|
if (!old || old->refcount > 1)
|
||
|
|
return con_allocate_new(vc);
|
||
|
|
|
||
|
|
old->sum = 0;
|
||
|
|
con_release_unimap(old);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int con_clear_unimap(struct vc_data *vc)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
console_lock();
|
||
|
|
ret = con_do_clear_unimap(vc);
|
||
|
|
console_unlock();
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct uni_pagedict *con_unshare_unimap(struct vc_data *vc,
|
||
|
|
struct uni_pagedict *old)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *new;
|
||
|
|
unsigned int d, r, g;
|
||
|
|
int ret;
|
||
|
|
u16 uni = 0;
|
||
|
|
|
||
|
|
ret = con_allocate_new(vc);
|
||
|
|
if (ret)
|
||
|
|
return ERR_PTR(ret);
|
||
|
|
|
||
|
|
new = *vc->uni_pagedict_loc;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* uni_pgdir is a 32*32*64 table with rows allocated when its first
|
||
|
|
* entry is added. The unicode value must still be incremented for
|
||
|
|
* empty rows. We are copying entries from "old" to "new".
|
||
|
|
*/
|
||
|
|
for (d = 0; d < UNI_DIRS; d++) {
|
||
|
|
u16 **dir = old->uni_pgdir[d];
|
||
|
|
if (!dir) {
|
||
|
|
/* Account for empty table */
|
||
|
|
uni += UNI_DIR_ROWS * UNI_ROW_GLYPHS;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (r = 0; r < UNI_DIR_ROWS; r++) {
|
||
|
|
u16 *row = dir[r];
|
||
|
|
if (!row) {
|
||
|
|
/* Account for row of 64 empty entries */
|
||
|
|
uni += UNI_ROW_GLYPHS;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (g = 0; g < UNI_ROW_GLYPHS; g++, uni++) {
|
||
|
|
if (row[g] == 0xffff)
|
||
|
|
continue;
|
||
|
|
/*
|
||
|
|
* Found one, copy entry for unicode uni with
|
||
|
|
* fontpos value row[g].
|
||
|
|
*/
|
||
|
|
ret = con_insert_unipair(new, uni, row[g]);
|
||
|
|
if (ret) {
|
||
|
|
old->refcount++;
|
||
|
|
*vc->uni_pagedict_loc = old;
|
||
|
|
con_release_unimap(new);
|
||
|
|
kfree(new);
|
||
|
|
return ERR_PTR(ret);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return new;
|
||
|
|
}
|
||
|
|
|
||
|
|
int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
|
||
|
|
{
|
||
|
|
int err = 0, err1;
|
||
|
|
struct uni_pagedict *dict;
|
||
|
|
struct unipair *unilist, *plist;
|
||
|
|
|
||
|
|
if (!ct)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
unilist = vmemdup_user(list, array_size(sizeof(*unilist), ct));
|
||
|
|
if (IS_ERR(unilist))
|
||
|
|
return PTR_ERR(unilist);
|
||
|
|
|
||
|
|
console_lock();
|
||
|
|
|
||
|
|
/* Save original vc_unipagdir_loc in case we allocate a new one */
|
||
|
|
dict = *vc->uni_pagedict_loc;
|
||
|
|
if (!dict) {
|
||
|
|
err = -EINVAL;
|
||
|
|
goto out_unlock;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dict->refcount > 1) {
|
||
|
|
dict = con_unshare_unimap(vc, dict);
|
||
|
|
if (IS_ERR(dict)) {
|
||
|
|
err = PTR_ERR(dict);
|
||
|
|
goto out_unlock;
|
||
|
|
}
|
||
|
|
} else if (dict == dflt) {
|
||
|
|
dflt = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Insert user specified unicode pairs into new table.
|
||
|
|
*/
|
||
|
|
for (plist = unilist; ct; ct--, plist++) {
|
||
|
|
err1 = con_insert_unipair(dict, plist->unicode, plist->fontpos);
|
||
|
|
if (err1)
|
||
|
|
err = err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Merge with fontmaps of any other virtual consoles.
|
||
|
|
*/
|
||
|
|
if (con_unify_unimap(vc, dict))
|
||
|
|
goto out_unlock;
|
||
|
|
|
||
|
|
for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++)
|
||
|
|
set_inverse_transl(vc, dict, m);
|
||
|
|
set_inverse_trans_unicode(dict);
|
||
|
|
|
||
|
|
out_unlock:
|
||
|
|
console_unlock();
|
||
|
|
kvfree(unilist);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* con_set_default_unimap - set default unicode map
|
||
|
|
* @vc: the console we are updating
|
||
|
|
*
|
||
|
|
* 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 video setup, and when the
|
||
|
|
* PIO_FONTRESET ioctl is called.
|
||
|
|
*
|
||
|
|
* The caller must hold the console lock
|
||
|
|
*/
|
||
|
|
int con_set_default_unimap(struct vc_data *vc)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *dict;
|
||
|
|
unsigned int fontpos, count;
|
||
|
|
int err = 0, err1;
|
||
|
|
u16 *dfont;
|
||
|
|
|
||
|
|
if (dflt) {
|
||
|
|
dict = *vc->uni_pagedict_loc;
|
||
|
|
if (dict == dflt)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
dflt->refcount++;
|
||
|
|
*vc->uni_pagedict_loc = dflt;
|
||
|
|
if (dict && !--dict->refcount) {
|
||
|
|
con_release_unimap(dict);
|
||
|
|
kfree(dict);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* The default font is always 256 characters */
|
||
|
|
|
||
|
|
err = con_do_clear_unimap(vc);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
dict = *vc->uni_pagedict_loc;
|
||
|
|
dfont = dfont_unitable;
|
||
|
|
|
||
|
|
for (fontpos = 0; fontpos < 256U; fontpos++)
|
||
|
|
for (count = dfont_unicount[fontpos]; count; count--) {
|
||
|
|
err1 = con_insert_unipair(dict, *(dfont++), fontpos);
|
||
|
|
if (err1)
|
||
|
|
err = err1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (con_unify_unimap(vc, dict)) {
|
||
|
|
dflt = *vc->uni_pagedict_loc;
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++)
|
||
|
|
set_inverse_transl(vc, dict, m);
|
||
|
|
set_inverse_trans_unicode(dict);
|
||
|
|
dflt = dict;
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(con_set_default_unimap);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* con_copy_unimap - copy unimap between two vts
|
||
|
|
* @dst_vc: target
|
||
|
|
* @src_vc: source
|
||
|
|
*
|
||
|
|
* The caller must hold the console lock when invoking this method
|
||
|
|
*/
|
||
|
|
int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *src;
|
||
|
|
|
||
|
|
if (!*src_vc->uni_pagedict_loc)
|
||
|
|
return -EINVAL;
|
||
|
|
if (*dst_vc->uni_pagedict_loc == *src_vc->uni_pagedict_loc)
|
||
|
|
return 0;
|
||
|
|
con_free_unimap(dst_vc);
|
||
|
|
src = *src_vc->uni_pagedict_loc;
|
||
|
|
src->refcount++;
|
||
|
|
*dst_vc->uni_pagedict_loc = src;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(con_copy_unimap);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* con_get_unimap - get the unicode map
|
||
|
|
*
|
||
|
|
* Read the console unicode data for this console. Called from the ioctl
|
||
|
|
* handlers.
|
||
|
|
*/
|
||
|
|
int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
|
||
|
|
struct unipair __user *list)
|
||
|
|
{
|
||
|
|
ushort ect;
|
||
|
|
struct uni_pagedict *dict;
|
||
|
|
struct unipair *unilist;
|
||
|
|
unsigned int d, r, g;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
unilist = kvmalloc_array(ct, sizeof(*unilist), GFP_KERNEL);
|
||
|
|
if (!unilist)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
console_lock();
|
||
|
|
|
||
|
|
ect = 0;
|
||
|
|
dict = *vc->uni_pagedict_loc;
|
||
|
|
if (!dict)
|
||
|
|
goto unlock;
|
||
|
|
|
||
|
|
for (d = 0; d < UNI_DIRS; d++) {
|
||
|
|
u16 **dir = dict->uni_pgdir[d];
|
||
|
|
if (!dir)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
for (r = 0; r < UNI_DIR_ROWS; r++) {
|
||
|
|
u16 *row = dir[r];
|
||
|
|
if (!row)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
for (g = 0; g < UNI_ROW_GLYPHS; g++, row++) {
|
||
|
|
if (*row >= MAX_GLYPH)
|
||
|
|
continue;
|
||
|
|
if (ect < ct) {
|
||
|
|
unilist[ect].unicode = UNI(d, r, g);
|
||
|
|
unilist[ect].fontpos = *row;
|
||
|
|
}
|
||
|
|
ect++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
unlock:
|
||
|
|
console_unlock();
|
||
|
|
if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist)))
|
||
|
|
ret = -EFAULT;
|
||
|
|
if (put_user(ect, uct))
|
||
|
|
ret = -EFAULT;
|
||
|
|
kvfree(unilist);
|
||
|
|
return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Always use USER_MAP. These functions are used by the keyboard,
|
||
|
|
* which shouldn't be affected by G0/G1 switching, etc.
|
||
|
|
* If the user map still contains default values, i.e. the
|
||
|
|
* direct-to-font mapping, then assume user is using Latin1.
|
||
|
|
*
|
||
|
|
* FIXME: at some point we need to decide if we want to lock the table
|
||
|
|
* update element itself via the keyboard_event_lock for consistency with the
|
||
|
|
* keyboard driver as well as the consoles
|
||
|
|
*/
|
||
|
|
/* may be called during an interrupt */
|
||
|
|
u32 conv_8bit_to_uni(unsigned char c)
|
||
|
|
{
|
||
|
|
unsigned short uni = translations[USER_MAP][c];
|
||
|
|
return uni == (0xf000 | c) ? c : uni;
|
||
|
|
}
|
||
|
|
|
||
|
|
int conv_uni_to_8bit(u32 uni)
|
||
|
|
{
|
||
|
|
int c;
|
||
|
|
for (c = 0; c < ARRAY_SIZE(translations[USER_MAP]); c++)
|
||
|
|
if (translations[USER_MAP][c] == uni ||
|
||
|
|
(translations[USER_MAP][c] == (c | 0xf000) && uni == c))
|
||
|
|
return c;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int conv_uni_to_pc(struct vc_data *conp, long ucs)
|
||
|
|
{
|
||
|
|
struct uni_pagedict *dict;
|
||
|
|
u16 **dir, *row, glyph;
|
||
|
|
|
||
|
|
/* Only 16-bit codes supported at this time */
|
||
|
|
if (ucs > 0xffff)
|
||
|
|
return -4; /* Not found */
|
||
|
|
else if (ucs < 0x20)
|
||
|
|
return -1; /* Not a printable character */
|
||
|
|
else if (ucs == 0xfeff || (ucs >= 0x200b && 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;
|
||
|
|
|
||
|
|
dict = *conp->uni_pagedict_loc;
|
||
|
|
if (!dict)
|
||
|
|
return -3;
|
||
|
|
|
||
|
|
dir = dict->uni_pgdir[UNI_DIR(ucs)];
|
||
|
|
if (!dir)
|
||
|
|
return -4;
|
||
|
|
|
||
|
|
row = dir[UNI_ROW(ucs)];
|
||
|
|
if (!row)
|
||
|
|
return -4;
|
||
|
|
|
||
|
|
glyph = row[UNI_GLYPH(ucs)];
|
||
|
|
if (glyph >= MAX_GLYPH)
|
||
|
|
return -4;
|
||
|
|
|
||
|
|
return glyph;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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->uni_pagedict_loc)
|
||
|
|
con_set_default_unimap(vc_cons[i].d);
|
||
|
|
}
|
||
|
|
|