TTY: create drivers/tty/vt and move the vt code there

The vt and other related code is moved into the drivers/tty/vt directory.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 745 insertions, 0 deletions

diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
new file mode 100644
index 000000000000..45d3e80156d4
--- /dev/null
+++ b/drivers/tty/vt/consolemap.c
@@ -0,0 +1,745 @@
+/*
+ * 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];
+        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;
+
+        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;
+        }
+        if (p->inverse_trans_unicode) {
+                kfree(p->inverse_trans_unicode);
+                p->inverse_trans_unicode = 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 = 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_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 */
+        set_inverse_trans_unicode(vc, p);
+  
+        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 */
+        set_inverse_trans_unicode(vc, p);
+        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;
+}
+
+/*
+ * 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.
+ */
+/* 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);
+}
+
+EXPORT_SYMBOL(con_copy_unimap);