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linux/drivers/tty/vt/consolemap.c
Alan Cox 5d1a33fa55 vt: push the tty_lock down into the map handling 
When we do this it becomes clear the lock we should be holding is the vc
lock, and in fact many of our other helpers are properly invoked this way.

We don't at this point guarantee not to race the keyboard code but the results
of that appear harmless and that was true before we started as well.

We now have no users of tty_lock in the console driver...

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-24 16:14:14 -07:00

840 lines
24 KiB
C
Raw Blame History

/*
* 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/console.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];
u16 *inverse_trans_unicode;
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;
}
}
}
static void set_inverse_trans_unicode(struct vc_data *conp,
struct uni_pagedir *p)
{
int i, j, k, glyph;
u16 **p1, *p2;
u16 *q;
if (!p) return;
q = p->inverse_trans_unicode;
if (!q) {
q = p->inverse_trans_unicode =
kmalloc(MAX_GLYPH * sizeof(u16), GFP_KERNEL);
if (!q)
return;
}
memset(q, 0, MAX_GLYPH * sizeof(u16));
for (i = 0; i < 32; i++) {
p1 = p->uni_pgdir[i];
if (!p1)
continue;
for (j = 0; j < 32; j++) {
p2 = p1[j];
if (!p2)
continue;
for (k = 0; k < 64; k++) {
glyph = p2[k];
if (glyph >= 0 && glyph < MAX_GLYPH
&& q[glyph] < 32)
q[glyph] = (i << 11) + (j << 6) + k;
}
}
}
}
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.
* Still, it is now possible to a certain extent to cut and paste non-ASCII.
*/
u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode)
{
struct uni_pagedir *p;
int m;
if (glyph < 0 || glyph >= MAX_GLYPH)
return 0;
else if (!(p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc))
return glyph;
else if (use_unicode) {
if (!p->inverse_trans_unicode)
return glyph;
else
return p->inverse_trans_unicode[glyph];
} else {
m = inv_translate[conp->vc_num];
if (!p->inverse_translations[m])
return glyph;
else
return p->inverse_translations[m][glyph];
}
}
EXPORT_SYMBOL_GPL(inverse_translate);
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);
set_inverse_trans_unicode(vc_cons[i].d, 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)
{
int i;
unsigned short *p = translations[USER_MAP];
if (!access_ok(VERIFY_READ, arg, E_TABSZ))
return -EFAULT;
console_lock();
for (i=0; i<E_TABSZ ; i++) {
unsigned char uc;
__get_user(uc, arg+i);
p[i] = UNI_DIRECT_BASE | uc;
}
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];
if (!access_ok(VERIFY_WRITE, arg, E_TABSZ))
return -EFAULT;
console_lock();
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);
}
console_unlock();
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;
console_lock();
for (i=0; i<E_TABSZ ; i++) {
unsigned short us;
__get_user(us, arg+i);
p[i] = us;
}
update_user_maps();
console_unlock();
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;
console_lock();
for (i=0; i<E_TABSZ ; i++)
__put_user(p[i], arg+i);
console_unlock();
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;
}
if (p->inverse_trans_unicode) {
kfree(p->inverse_trans_unicode);
p->inverse_trans_unicode = NULL;
}
}
/* Caller must hold the console lock */
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
Caller must hold the lock */
static int con_do_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 = kzalloc(sizeof(*p), GFP_KERNEL);
if (!q) {
if (p)
p->refcount++;
return -ENOMEM;
}
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_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
{
int ret;
console_lock();
ret = con_do_clear_unimap(vc, ui);
console_unlock();
return ret;
}
int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
{
int err = 0, err1, i;
struct uni_pagedir *p, *q;
console_lock();
/* Save original vc_unipagdir_loc in case we allocate a new one */
p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
if (p->readonly) {
console_unlock();
return -EIO;
}
if (!ct) {
console_unlock();
return 0;
}
if (p->refcount > 1) {
int j, k;
u16 **p1, *p2, l;
err1 = con_do_clear_unimap(vc, NULL);
if (err1) {
console_unlock();
return err1;
}
/*
* Since refcount was > 1, con_clear_unimap() allocated a
* a new uni_pagedir for this vc. Re: p != q
*/
q = (struct uni_pagedir *)*vc->vc_uni_pagedir_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 "p" (old) to "q" (new).
*/
l = 0; /* unicode value */
for (i = 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) {
/*
* Found one, copy entry for unicode
* l with fontpos value p2[k].
*/
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);
console_unlock();
return err1;
}
}
} else {
/* Account for row of 64 empty entries */
l += 64;
}
else
/* Account for empty table */
l += 32 * 64;
/*
* Finished copying font table, set vc_uni_pagedir to new table
*/
p = q;
} else if (p == dflt) {
dflt = NULL;
}
/*
* Insert user specified unicode pairs into new table.
*/
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++;
}
/*
* Merge with fontmaps of any other virtual consoles.
*/
if (con_unify_unimap(vc, p)) {
console_unlock();
return err;
}
for (i = 0; i <= 3; i++)
set_inverse_transl(vc, p, i); /* Update inverse translations */
set_inverse_trans_unicode(vc, p);
console_unlock();
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)
{
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_do_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 */
set_inverse_trans_unicode(vc, p);
dflt = p;
return err;
}
EXPORT_SYMBOL(con_set_default_unimap);
/**
* con_copy_unimap - copy unimap between two vts
* @dst_vc: target
* @src_vt: 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_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;
}
EXPORT_SYMBOL(con_copy_unimap);
/**
* con_get_unimap - get the unicode map
* @vc: the console to read from
*
* 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)
{
int i, j, k, ect;
u16 **p1, *p2;
struct uni_pagedir *p;
console_lock();
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);
console_unlock();
return ((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 < 0x100; 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)
{
int h;
u16 **p1, *p2;
struct uni_pagedir *p;
/* 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;
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);
}
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