1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 1991, 1992 Linus Torvalds
7 * Hopefully this will be a rather complete VT102 implementation.
9 * Beeping thanks to John T Kohl.
11 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
12 * Chars, and VT100 enhancements by Peter MacDonald.
14 * Copy and paste function by Andrew Haylett,
15 * some enhancements by Alessandro Rubini.
17 * Code to check for different video-cards mostly by Galen Hunt,
18 * <g-hunt@ee.utah.edu>
20 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
21 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
24 * Resizing of consoles, aeb, 940926
26 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
29 * User-defined bell sound, new setterm control sequences and printk
30 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 * Merge with the abstract console driver by Geert Uytterhoeven
35 * <geert@linux-m68k.org>, Jan 1997.
37 * Original m68k console driver modifications by
39 * - Arno Griffioen <arno@usn.nl>
40 * - David Carter <carter@cs.bris.ac.uk>
42 * The abstract console driver provides a generic interface for a text
43 * console. It supports VGA text mode, frame buffer based graphical consoles
44 * and special graphics processors that are only accessible through some
45 * registers (e.g. a TMS340x0 GSP).
47 * The interface to the hardware is specified using a special structure
48 * (struct consw) which contains function pointers to console operations
49 * (see <linux/console.h> for more information).
51 * Support for changeable cursor shape
52 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 * Ported to i386 and con_scrolldelta fixed
55 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 * Resurrected character buffers in videoram plus lots of other trickery
58 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 * Removed old-style timers, introduced console_timer, made timer
61 * deletion SMP-safe. 17Jun00, Andrew Morton
63 * Removed console_lock, enabled interrupts across all console operations
64 * 13 March 2001, Andrew Morton
66 * Fixed UTF-8 mode so alternate charset modes always work according
67 * to control sequences interpreted in do_con_trol function
68 * preserving backward VT100 semigraphics compatibility,
69 * malformed UTF sequences represented as sequences of replacement glyphs,
70 * original codes or '?' as a last resort if replacement glyph is undefined
71 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
74 #include <linux/module.h>
75 #include <linux/types.h>
76 #include <linux/sched/signal.h>
77 #include <linux/tty.h>
78 #include <linux/tty_flip.h>
79 #include <linux/kernel.h>
80 #include <linux/string.h>
81 #include <linux/errno.h>
83 #include <linux/slab.h>
84 #include <linux/major.h>
86 #include <linux/console.h>
87 #include <linux/init.h>
88 #include <linux/mutex.h>
89 #include <linux/vt_kern.h>
90 #include <linux/selection.h>
91 #include <linux/tiocl.h>
92 #include <linux/kbd_kern.h>
93 #include <linux/consolemap.h>
94 #include <linux/timer.h>
95 #include <linux/interrupt.h>
96 #include <linux/workqueue.h>
98 #include <linux/font.h>
99 #include <linux/bitops.h>
100 #include <linux/notifier.h>
101 #include <linux/device.h>
102 #include <linux/io.h>
103 #include <linux/uaccess.h>
104 #include <linux/kdb.h>
105 #include <linux/ctype.h>
106 #include <linux/bsearch.h>
107 #include <linux/gcd.h>
109 #define MAX_NR_CON_DRIVER 16
111 #define CON_DRIVER_FLAG_MODULE 1
112 #define CON_DRIVER_FLAG_INIT 2
113 #define CON_DRIVER_FLAG_ATTR 4
114 #define CON_DRIVER_FLAG_ZOMBIE 8
117 const struct consw *con;
126 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
127 const struct consw *conswitchp;
129 /* A bitmap for codes <32. A bit of 1 indicates that the code
130 * corresponding to that bit number invokes some special action
131 * (such as cursor movement) and should not be displayed as a
132 * glyph unless the disp_ctrl mode is explicitly enabled.
134 #define CTRL_ACTION 0x0d00ff81
135 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
138 * Here is the default bell parameters: 750HZ, 1/8th of a second
140 #define DEFAULT_BELL_PITCH 750
141 #define DEFAULT_BELL_DURATION (HZ/8)
142 #define DEFAULT_CURSOR_BLINK_MS 200
144 struct vc vc_cons [MAX_NR_CONSOLES];
146 #ifndef VT_SINGLE_DRIVER
147 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
150 static int con_open(struct tty_struct *, struct file *);
151 static void vc_init(struct vc_data *vc, unsigned int rows,
152 unsigned int cols, int do_clear);
153 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
154 static void save_cur(struct vc_data *vc);
155 static void reset_terminal(struct vc_data *vc, int do_clear);
156 static void con_flush_chars(struct tty_struct *tty);
157 static int set_vesa_blanking(char __user *p);
158 static void set_cursor(struct vc_data *vc);
159 static void hide_cursor(struct vc_data *vc);
160 static void console_callback(struct work_struct *ignored);
161 static void con_driver_unregister_callback(struct work_struct *ignored);
162 static void blank_screen_t(struct timer_list *unused);
163 static void set_palette(struct vc_data *vc);
165 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
167 static int printable; /* Is console ready for printing? */
168 int default_utf8 = true;
169 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
170 int global_cursor_default = -1;
171 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
173 static int cur_default = CUR_DEFAULT;
174 module_param(cur_default, int, S_IRUGO | S_IWUSR);
177 * ignore_poke: don't unblank the screen when things are typed. This is
178 * mainly for the privacy of braille terminal users.
180 static int ignore_poke;
182 int do_poke_blanked_console;
185 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
186 static int vesa_off_interval;
187 static int blankinterval;
188 core_param(consoleblank, blankinterval, int, 0444);
190 static DECLARE_WORK(console_work, console_callback);
191 static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback);
194 * fg_console is the current virtual console,
195 * last_console is the last used one,
196 * want_console is the console we want to switch to,
197 * saved_* variants are for save/restore around kernel debugger enter/leave
201 int want_console = -1;
202 static int saved_fg_console;
203 static int saved_last_console;
204 static int saved_want_console;
205 static int saved_vc_mode;
206 static int saved_console_blanked;
209 * For each existing display, we have a pointer to console currently visible
210 * on that display, allowing consoles other than fg_console to be refreshed
211 * appropriately. Unless the low-level driver supplies its own display_fg
212 * variable, we use this one for the "master display".
214 static struct vc_data *master_display_fg;
217 * Unfortunately, we need to delay tty echo when we're currently writing to the
218 * console since the code is (and always was) not re-entrant, so we schedule
219 * all flip requests to process context with schedule-task() and run it from
220 * console_callback().
224 * For the same reason, we defer scrollback to the console callback.
226 static int scrollback_delta;
229 * Hook so that the power management routines can (un)blank
230 * the console on our behalf.
232 int (*console_blank_hook)(int);
234 static DEFINE_TIMER(console_timer, blank_screen_t);
235 static int blank_state;
236 static int blank_timer_expired;
244 * /sys/class/tty/tty0/
246 * the attribute 'active' contains the name of the current vc
247 * console and it supports poll() to detect vc switches
249 static struct device *tty0dev;
252 * Notifier list for console events.
254 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
256 int register_vt_notifier(struct notifier_block *nb)
258 return atomic_notifier_chain_register(&vt_notifier_list, nb);
260 EXPORT_SYMBOL_GPL(register_vt_notifier);
262 int unregister_vt_notifier(struct notifier_block *nb)
264 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
266 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
268 static void notify_write(struct vc_data *vc, unsigned int unicode)
270 struct vt_notifier_param param = { .vc = vc, .c = unicode };
271 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
274 static void notify_update(struct vc_data *vc)
276 struct vt_notifier_param param = { .vc = vc };
277 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
280 * Low-Level Functions
283 static inline bool con_is_fg(const struct vc_data *vc)
285 return vc->vc_num == fg_console;
288 static inline bool con_should_update(const struct vc_data *vc)
290 return con_is_visible(vc) && !console_blanked;
293 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
298 p = (unsigned short *)(vc->vc_origin + offset);
299 else if (!vc->vc_sw->con_screen_pos)
300 p = (unsigned short *)(vc->vc_visible_origin + offset);
302 p = vc->vc_sw->con_screen_pos(vc, offset);
306 /* Called from the keyboard irq path.. */
307 static inline void scrolldelta(int lines)
310 /* scrolldelta needs some kind of consistency lock, but the BKL was
311 and still is not protecting versus the scheduled back end */
312 scrollback_delta += lines;
313 schedule_console_callback();
316 void schedule_console_callback(void)
318 schedule_work(&console_work);
322 * Code to manage unicode-based screen buffers
325 #ifdef NO_VC_UNI_SCREEN
326 /* this disables and optimizes related code away at compile time */
327 #define get_vc_uniscr(vc) NULL
329 #define get_vc_uniscr(vc) vc->vc_uni_screen
332 #define VC_UNI_SCREEN_DEBUG 0
334 typedef uint32_t char32_t;
337 * Our screen buffer is preceded by an array of line pointers so that
338 * scrolling only implies some pointer shuffling.
344 static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows)
346 struct uni_screen *uniscr;
348 unsigned int memsize, i;
350 /* allocate everything in one go */
351 memsize = cols * rows * sizeof(char32_t);
352 memsize += rows * sizeof(char32_t *);
353 p = kmalloc(memsize, GFP_KERNEL);
357 /* initial line pointers */
359 p = uniscr->lines + rows;
360 for (i = 0; i < rows; i++) {
361 uniscr->lines[i] = p;
362 p += cols * sizeof(char32_t);
367 static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr)
369 kfree(vc->vc_uni_screen);
370 vc->vc_uni_screen = new_uniscr;
373 static void vc_uniscr_putc(struct vc_data *vc, char32_t uc)
375 struct uni_screen *uniscr = get_vc_uniscr(vc);
378 uniscr->lines[vc->vc_y][vc->vc_x] = uc;
381 static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr)
383 struct uni_screen *uniscr = get_vc_uniscr(vc);
386 char32_t *ln = uniscr->lines[vc->vc_y];
387 unsigned int x = vc->vc_x, cols = vc->vc_cols;
389 memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln));
390 memset32(&ln[x], ' ', nr);
394 static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr)
396 struct uni_screen *uniscr = get_vc_uniscr(vc);
399 char32_t *ln = uniscr->lines[vc->vc_y];
400 unsigned int x = vc->vc_x, cols = vc->vc_cols;
402 memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln));
403 memset32(&ln[cols - nr], ' ', nr);
407 static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x,
410 struct uni_screen *uniscr = get_vc_uniscr(vc);
413 char32_t *ln = uniscr->lines[vc->vc_y];
415 memset32(&ln[x], ' ', nr);
419 static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y,
422 struct uni_screen *uniscr = get_vc_uniscr(vc);
425 unsigned int cols = vc->vc_cols;
428 memset32(uniscr->lines[y++], ' ', cols);
432 static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
433 enum con_scroll dir, unsigned int nr)
435 struct uni_screen *uniscr = get_vc_uniscr(vc);
438 unsigned int i, j, k, sz, d, clear;
443 if (dir == SM_DOWN) {
447 for (i = 0; i < gcd(d, sz); i++) {
448 char32_t *tmp = uniscr->lines[t + i];
456 uniscr->lines[t + j] = uniscr->lines[t + k];
459 uniscr->lines[t + j] = tmp;
461 vc_uniscr_clear_lines(vc, clear, nr);
465 static void vc_uniscr_copy_area(struct uni_screen *dst,
466 unsigned int dst_cols,
467 unsigned int dst_rows,
468 struct uni_screen *src,
469 unsigned int src_cols,
470 unsigned int src_top_row,
471 unsigned int src_bot_row)
473 unsigned int dst_row = 0;
478 while (src_top_row < src_bot_row) {
479 char32_t *src_line = src->lines[src_top_row];
480 char32_t *dst_line = dst->lines[dst_row];
482 memcpy(dst_line, src_line, src_cols * sizeof(char32_t));
483 if (dst_cols - src_cols)
484 memset32(dst_line + src_cols, ' ', dst_cols - src_cols);
488 while (dst_row < dst_rows) {
489 char32_t *dst_line = dst->lines[dst_row];
491 memset32(dst_line, ' ', dst_cols);
497 * Called from vcs_read() to make sure unicode screen retrieval is possible.
498 * This will initialize the unicode screen buffer if not already done.
499 * This returns 0 if OK, or a negative error code otherwise.
500 * In particular, -ENODATA is returned if the console is not in UTF-8 mode.
502 int vc_uniscr_check(struct vc_data *vc)
504 struct uni_screen *uniscr;
508 if (__is_defined(NO_VC_UNI_SCREEN))
511 WARN_CONSOLE_UNLOCKED();
516 if (vc->vc_uni_screen)
519 uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows);
524 * Let's populate it initially with (imperfect) reverse translation.
525 * This is the next best thing we can do short of having it enabled
526 * from the start even when no users rely on this functionality. True
527 * unicode content will be available after a complete screen refresh.
529 p = (unsigned short *)vc->vc_origin;
530 mask = vc->vc_hi_font_mask | 0xff;
531 for (y = 0; y < vc->vc_rows; y++) {
532 char32_t *line = uniscr->lines[y];
533 for (x = 0; x < vc->vc_cols; x++) {
534 u16 glyph = scr_readw(p++) & mask;
535 line[x] = inverse_translate(vc, glyph, true);
539 vc->vc_uni_screen = uniscr;
544 * Called from vcs_read() to get the unicode data from the screen.
545 * This must be preceded by a successful call to vc_uniscr_check() once
546 * the console lock has been taken.
548 void vc_uniscr_copy_line(struct vc_data *vc, void *dest, int viewed,
549 unsigned int row, unsigned int col, unsigned int nr)
551 struct uni_screen *uniscr = get_vc_uniscr(vc);
552 int offset = row * vc->vc_size_row + col * 2;
557 pos = (unsigned long)screenpos(vc, offset, viewed);
558 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
560 * Desired position falls in the main screen buffer.
561 * However the actual row/col might be different if
562 * scrollback is active.
564 row = (pos - vc->vc_origin) / vc->vc_size_row;
565 col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2;
566 memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t));
569 * Scrollback is active. For now let's simply backtranslate
570 * the screen glyphs until the unicode screen buffer does
571 * synchronize with console display drivers for a scrollback
575 int mask = vc->vc_hi_font_mask | 0xff;
576 char32_t *uni_buf = dest;
578 u16 glyph = scr_readw(p++) & mask;
579 *uni_buf++ = inverse_translate(vc, glyph, true);
584 /* this is for validation and debugging only */
585 static void vc_uniscr_debug_check(struct vc_data *vc)
587 struct uni_screen *uniscr = get_vc_uniscr(vc);
591 if (!VC_UNI_SCREEN_DEBUG || !uniscr)
594 WARN_CONSOLE_UNLOCKED();
597 * Make sure our unicode screen translates into the same glyphs
598 * as the actual screen. This is brutal indeed.
600 p = (unsigned short *)vc->vc_origin;
601 mask = vc->vc_hi_font_mask | 0xff;
602 for (y = 0; y < vc->vc_rows; y++) {
603 char32_t *line = uniscr->lines[y];
604 for (x = 0; x < vc->vc_cols; x++) {
605 u16 glyph = scr_readw(p++) & mask;
606 char32_t uc = line[x];
607 int tc = conv_uni_to_pc(vc, uc);
609 tc = conv_uni_to_pc(vc, 0xfffd);
611 tc = conv_uni_to_pc(vc, '?');
614 "%s: mismatch at %d,%d: glyph=%#x tc=%#x\n",
615 __func__, x, y, glyph, tc);
621 static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
622 enum con_scroll dir, unsigned int nr)
628 if (b > vc->vc_rows || t >= b || nr < 1)
630 vc_uniscr_scroll(vc, t, b, dir, nr);
631 if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr))
634 s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t);
635 d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr));
638 clear = s + (b - t - nr) * vc->vc_cols;
641 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
642 scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr);
645 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
647 unsigned int xx, yy, offset;
651 if (!vc->vc_sw->con_getxy) {
652 offset = (start - vc->vc_origin) / 2;
653 xx = offset % vc->vc_cols;
654 yy = offset / vc->vc_cols;
657 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
661 u16 attrib = scr_readw(p) & 0xff00;
664 while (xx < vc->vc_cols && count) {
665 if (attrib != (scr_readw(p) & 0xff00)) {
667 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
670 attrib = scr_readw(p) & 0xff00;
677 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
682 if (vc->vc_sw->con_getxy) {
684 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
689 void update_region(struct vc_data *vc, unsigned long start, int count)
691 WARN_CONSOLE_UNLOCKED();
693 if (con_should_update(vc)) {
695 do_update_region(vc, start, count);
700 /* Structure of attributes is hardware-dependent */
702 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
703 u8 _underline, u8 _reverse, u8 _italic)
705 if (vc->vc_sw->con_build_attr)
706 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
707 _blink, _underline, _reverse, _italic);
710 * ++roman: I completely changed the attribute format for monochrome
711 * mode (!can_do_color). The formerly used MDA (monochrome display
712 * adapter) format didn't allow the combination of certain effects.
713 * Now the attribute is just a bit vector:
714 * Bit 0..1: intensity (0..2)
721 if (!vc->vc_can_do_color)
724 (_underline ? 4 : 0) |
728 a = (a & 0xF0) | vc->vc_itcolor;
730 a = (a & 0xf0) | vc->vc_ulcolor;
731 else if (_intensity == 0)
732 a = (a & 0xf0) | vc->vc_halfcolor;
734 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
739 if (vc->vc_hi_font_mask == 0x100)
745 static void update_attr(struct vc_data *vc)
747 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
748 vc->vc_blink, vc->vc_underline,
749 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
750 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
753 /* Note: inverting the screen twice should revert to the original state */
754 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
758 WARN_CONSOLE_UNLOCKED();
761 p = screenpos(vc, offset, viewed);
762 if (vc->vc_sw->con_invert_region) {
763 vc->vc_sw->con_invert_region(vc, p, count);
769 if (!vc->vc_can_do_color) {
776 } else if (vc->vc_hi_font_mask == 0x100) {
779 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
786 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
793 if (con_should_update(vc))
794 do_update_region(vc, (unsigned long) p, count);
798 /* used by selection: complement pointer position */
799 void complement_pos(struct vc_data *vc, int offset)
801 static int old_offset = -1;
802 static unsigned short old;
803 static unsigned short oldx, oldy;
805 WARN_CONSOLE_UNLOCKED();
807 if (old_offset != -1 && old_offset >= 0 &&
808 old_offset < vc->vc_screenbuf_size) {
809 scr_writew(old, screenpos(vc, old_offset, 1));
810 if (con_should_update(vc))
811 vc->vc_sw->con_putc(vc, old, oldy, oldx);
817 if (offset != -1 && offset >= 0 &&
818 offset < vc->vc_screenbuf_size) {
821 p = screenpos(vc, offset, 1);
823 new = old ^ vc->vc_complement_mask;
825 if (con_should_update(vc)) {
826 oldx = (offset >> 1) % vc->vc_cols;
827 oldy = (offset >> 1) / vc->vc_cols;
828 vc->vc_sw->con_putc(vc, new, oldy, oldx);
834 static void insert_char(struct vc_data *vc, unsigned int nr)
836 unsigned short *p = (unsigned short *) vc->vc_pos;
838 vc_uniscr_insert(vc, nr);
839 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2);
840 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
841 vc->vc_need_wrap = 0;
842 if (con_should_update(vc))
843 do_update_region(vc, (unsigned long) p,
844 vc->vc_cols - vc->vc_x);
847 static void delete_char(struct vc_data *vc, unsigned int nr)
849 unsigned short *p = (unsigned short *) vc->vc_pos;
851 vc_uniscr_delete(vc, nr);
852 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2);
853 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char,
855 vc->vc_need_wrap = 0;
856 if (con_should_update(vc))
857 do_update_region(vc, (unsigned long) p,
858 vc->vc_cols - vc->vc_x);
861 static int softcursor_original = -1;
863 static void add_softcursor(struct vc_data *vc)
865 int i = scr_readw((u16 *) vc->vc_pos);
866 u32 type = vc->vc_cursor_type;
868 if (! (type & 0x10)) return;
869 if (softcursor_original != -1) return;
870 softcursor_original = i;
871 i |= ((type >> 8) & 0xff00 );
872 i ^= ((type) & 0xff00 );
873 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
874 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
875 scr_writew(i, (u16 *) vc->vc_pos);
876 if (con_should_update(vc))
877 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
880 static void hide_softcursor(struct vc_data *vc)
882 if (softcursor_original != -1) {
883 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
884 if (con_should_update(vc))
885 vc->vc_sw->con_putc(vc, softcursor_original,
887 softcursor_original = -1;
891 static void hide_cursor(struct vc_data *vc)
895 vc->vc_sw->con_cursor(vc, CM_ERASE);
899 static void set_cursor(struct vc_data *vc)
901 if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
907 if ((vc->vc_cursor_type & 0x0f) != 1)
908 vc->vc_sw->con_cursor(vc, CM_DRAW);
913 static void set_origin(struct vc_data *vc)
915 WARN_CONSOLE_UNLOCKED();
917 if (!con_is_visible(vc) ||
918 !vc->vc_sw->con_set_origin ||
919 !vc->vc_sw->con_set_origin(vc))
920 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
921 vc->vc_visible_origin = vc->vc_origin;
922 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
923 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
926 static void save_screen(struct vc_data *vc)
928 WARN_CONSOLE_UNLOCKED();
930 if (vc->vc_sw->con_save_screen)
931 vc->vc_sw->con_save_screen(vc);
934 static void flush_scrollback(struct vc_data *vc)
936 WARN_CONSOLE_UNLOCKED();
938 if (vc->vc_sw->con_flush_scrollback)
939 vc->vc_sw->con_flush_scrollback(vc);
943 * Redrawing of screen
946 void clear_buffer_attributes(struct vc_data *vc)
948 unsigned short *p = (unsigned short *)vc->vc_origin;
949 int count = vc->vc_screenbuf_size / 2;
950 int mask = vc->vc_hi_font_mask | 0xff;
952 for (; count > 0; count--, p++) {
953 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
957 void redraw_screen(struct vc_data *vc, int is_switch)
961 WARN_CONSOLE_UNLOCKED();
965 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
970 struct vc_data *old_vc = vc_cons[fg_console].d;
973 if (!con_is_visible(vc))
975 *vc->vc_display_fg = vc;
976 fg_console = vc->vc_num;
978 if (!con_is_visible(old_vc)) {
983 sysfs_notify(&tty0dev->kobj, NULL, "active");
991 int old_was_color = vc->vc_can_do_color;
994 update = vc->vc_sw->con_switch(vc);
997 * If console changed from mono<->color, the best we can do
998 * is to clear the buffer attributes. As it currently stands,
999 * rebuilding new attributes from the old buffer is not doable
1000 * without overly complex code.
1002 if (old_was_color != vc->vc_can_do_color) {
1004 clear_buffer_attributes(vc);
1007 if (update && vc->vc_mode != KD_GRAPHICS)
1008 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1013 compute_shiftstate();
1019 * Allocation, freeing and resizing of VTs.
1022 int vc_cons_allocated(unsigned int i)
1024 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
1027 static void visual_init(struct vc_data *vc, int num, int init)
1029 /* ++Geert: vc->vc_sw->con_init determines console size */
1031 module_put(vc->vc_sw->owner);
1032 vc->vc_sw = conswitchp;
1033 #ifndef VT_SINGLE_DRIVER
1034 if (con_driver_map[num])
1035 vc->vc_sw = con_driver_map[num];
1037 __module_get(vc->vc_sw->owner);
1039 vc->vc_display_fg = &master_display_fg;
1040 if (vc->vc_uni_pagedir_loc)
1041 con_free_unimap(vc);
1042 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
1043 vc->vc_uni_pagedir = NULL;
1044 vc->vc_hi_font_mask = 0;
1045 vc->vc_complement_mask = 0;
1046 vc->vc_can_do_color = 0;
1047 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1048 vc->vc_sw->con_init(vc, init);
1049 if (!vc->vc_complement_mask)
1050 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1051 vc->vc_s_complement_mask = vc->vc_complement_mask;
1052 vc->vc_size_row = vc->vc_cols << 1;
1053 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
1056 int vc_allocate(unsigned int currcons) /* return 0 on success */
1058 struct vt_notifier_param param;
1061 WARN_CONSOLE_UNLOCKED();
1063 if (currcons >= MAX_NR_CONSOLES)
1066 if (vc_cons[currcons].d)
1069 /* due to the granularity of kmalloc, we waste some memory here */
1070 /* the alloc is done in two steps, to optimize the common situation
1071 of a 25x80 console (structsize=216, screenbuf_size=4000) */
1072 /* although the numbers above are not valid since long ago, the
1073 point is still up-to-date and the comment still has its value
1074 even if only as a historical artifact. --mj, July 1998 */
1075 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
1079 vc_cons[currcons].d = vc;
1080 tty_port_init(&vc->port);
1081 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
1083 visual_init(vc, currcons, 1);
1085 if (!*vc->vc_uni_pagedir_loc)
1086 con_set_default_unimap(vc);
1088 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL);
1089 if (!vc->vc_screenbuf)
1092 /* If no drivers have overridden us and the user didn't pass a
1093 boot option, default to displaying the cursor */
1094 if (global_cursor_default == -1)
1095 global_cursor_default = 1;
1097 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
1098 vcs_make_sysfs(currcons);
1099 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
1104 vc_cons[currcons].d = NULL;
1108 static inline int resize_screen(struct vc_data *vc, int width, int height,
1111 /* Resizes the resolution of the display adapater */
1114 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
1115 err = vc->vc_sw->con_resize(vc, width, height, user);
1121 * Change # of rows and columns (0 means unchanged/the size of fg_console)
1122 * [this is to be used together with some user program
1123 * like resize that changes the hardware videomode]
1125 #define VC_RESIZE_MAXCOL (32767)
1126 #define VC_RESIZE_MAXROW (32767)
1129 * vc_do_resize - resizing method for the tty
1130 * @tty: tty being resized
1131 * @real_tty: real tty (different to tty if a pty/tty pair)
1132 * @vc: virtual console private data
1136 * Resize a virtual console, clipping according to the actual constraints.
1137 * If the caller passes a tty structure then update the termios winsize
1138 * information and perform any necessary signal handling.
1140 * Caller must hold the console semaphore. Takes the termios rwsem and
1141 * ctrl_lock of the tty IFF a tty is passed.
1144 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
1145 unsigned int cols, unsigned int lines)
1147 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
1149 unsigned int old_rows, old_row_size, first_copied_row;
1150 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
1152 unsigned short *newscreen;
1153 struct uni_screen *new_uniscr = NULL;
1155 WARN_CONSOLE_UNLOCKED();
1160 user = vc->vc_resize_user;
1161 vc->vc_resize_user = 0;
1163 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
1166 new_cols = (cols ? cols : vc->vc_cols);
1167 new_rows = (lines ? lines : vc->vc_rows);
1168 new_row_size = new_cols << 1;
1169 new_screen_size = new_row_size * new_rows;
1171 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
1174 if (new_screen_size > (4 << 20))
1176 newscreen = kzalloc(new_screen_size, GFP_USER);
1180 if (get_vc_uniscr(vc)) {
1181 new_uniscr = vc_uniscr_alloc(new_cols, new_rows);
1191 old_rows = vc->vc_rows;
1192 old_row_size = vc->vc_size_row;
1194 err = resize_screen(vc, new_cols, new_rows, user);
1201 vc->vc_rows = new_rows;
1202 vc->vc_cols = new_cols;
1203 vc->vc_size_row = new_row_size;
1204 vc->vc_screenbuf_size = new_screen_size;
1206 rlth = min(old_row_size, new_row_size);
1207 rrem = new_row_size - rlth;
1208 old_origin = vc->vc_origin;
1209 new_origin = (long) newscreen;
1210 new_scr_end = new_origin + new_screen_size;
1212 if (vc->vc_y > new_rows) {
1213 if (old_rows - vc->vc_y < new_rows) {
1215 * Cursor near the bottom, copy contents from the
1218 first_copied_row = (old_rows - new_rows);
1221 * Cursor is in no man's land, copy 1/2 screenful
1222 * from the top and bottom of cursor position
1224 first_copied_row = (vc->vc_y - new_rows/2);
1226 old_origin += first_copied_row * old_row_size;
1228 first_copied_row = 0;
1229 end = old_origin + old_row_size * min(old_rows, new_rows);
1231 vc_uniscr_copy_area(new_uniscr, new_cols, new_rows,
1232 get_vc_uniscr(vc), rlth/2, first_copied_row,
1233 min(old_rows, new_rows));
1234 vc_uniscr_set(vc, new_uniscr);
1238 while (old_origin < end) {
1239 scr_memcpyw((unsigned short *) new_origin,
1240 (unsigned short *) old_origin, rlth);
1242 scr_memsetw((void *)(new_origin + rlth),
1243 vc->vc_video_erase_char, rrem);
1244 old_origin += old_row_size;
1245 new_origin += new_row_size;
1247 if (new_scr_end > new_origin)
1248 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
1249 new_scr_end - new_origin);
1250 kfree(vc->vc_screenbuf);
1251 vc->vc_screenbuf = newscreen;
1252 vc->vc_screenbuf_size = new_screen_size;
1255 /* do part of a reset_terminal() */
1257 vc->vc_bottom = vc->vc_rows;
1258 gotoxy(vc, vc->vc_x, vc->vc_y);
1262 /* Rewrite the requested winsize data with the actual
1265 memset(&ws, 0, sizeof(ws));
1266 ws.ws_row = vc->vc_rows;
1267 ws.ws_col = vc->vc_cols;
1268 ws.ws_ypixel = vc->vc_scan_lines;
1269 tty_do_resize(tty, &ws);
1272 if (con_is_visible(vc))
1274 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
1280 * vc_resize - resize a VT
1281 * @vc: virtual console
1285 * Resize a virtual console as seen from the console end of things. We
1286 * use the common vc_do_resize methods to update the structures. The
1287 * caller must hold the console sem to protect console internals and
1291 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
1293 return vc_do_resize(vc->port.tty, vc, cols, rows);
1297 * vt_resize - resize a VT
1298 * @tty: tty to resize
1299 * @ws: winsize attributes
1301 * Resize a virtual terminal. This is called by the tty layer as we
1302 * register our own handler for resizing. The mutual helper does all
1305 * Takes the console sem and the called methods then take the tty
1306 * termios_rwsem and the tty ctrl_lock in that order.
1308 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
1310 struct vc_data *vc = tty->driver_data;
1314 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
1319 struct vc_data *vc_deallocate(unsigned int currcons)
1321 struct vc_data *vc = NULL;
1323 WARN_CONSOLE_UNLOCKED();
1325 if (vc_cons_allocated(currcons)) {
1326 struct vt_notifier_param param;
1328 param.vc = vc = vc_cons[currcons].d;
1329 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
1330 vcs_remove_sysfs(currcons);
1331 vc->vc_sw->con_deinit(vc);
1332 put_pid(vc->vt_pid);
1333 module_put(vc->vc_sw->owner);
1334 vc_uniscr_set(vc, NULL);
1335 kfree(vc->vc_screenbuf);
1336 vc_cons[currcons].d = NULL;
1345 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1346 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1347 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1349 #define decarm VC_REPEAT
1350 #define decckm VC_CKMODE
1351 #define kbdapplic VC_APPLIC
1355 * this is what the terminal answers to a ESC-Z or csi0c query.
1357 #define VT100ID "\033[?1;2c"
1358 #define VT102ID "\033[?6c"
1360 const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1361 8,12,10,14, 9,13,11,15 };
1363 /* the default colour table, for VGA+ colour systems */
1364 unsigned char default_red[] = {
1365 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa,
1366 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
1368 module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR);
1370 unsigned char default_grn[] = {
1371 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
1372 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
1374 module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR);
1376 unsigned char default_blu[] = {
1377 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
1378 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
1380 module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR);
1383 * gotoxy() must verify all boundaries, because the arguments
1384 * might also be negative. If the given position is out of
1385 * bounds, the cursor is placed at the nearest margin.
1387 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1394 if (new_x >= vc->vc_cols)
1395 vc->vc_x = vc->vc_cols - 1;
1402 max_y = vc->vc_bottom;
1405 max_y = vc->vc_rows;
1409 else if (new_y >= max_y)
1410 vc->vc_y = max_y - 1;
1413 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1414 vc->vc_need_wrap = 0;
1417 /* for absolute user moves, when decom is set */
1418 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1420 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1423 void scrollback(struct vc_data *vc)
1425 scrolldelta(-(vc->vc_rows / 2));
1428 void scrollfront(struct vc_data *vc, int lines)
1431 lines = vc->vc_rows / 2;
1435 static void lf(struct vc_data *vc)
1437 /* don't scroll if above bottom of scrolling region, or
1438 * if below scrolling region
1440 if (vc->vc_y + 1 == vc->vc_bottom)
1441 con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1);
1442 else if (vc->vc_y < vc->vc_rows - 1) {
1444 vc->vc_pos += vc->vc_size_row;
1446 vc->vc_need_wrap = 0;
1447 notify_write(vc, '\n');
1450 static void ri(struct vc_data *vc)
1452 /* don't scroll if below top of scrolling region, or
1453 * if above scrolling region
1455 if (vc->vc_y == vc->vc_top)
1456 con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1);
1457 else if (vc->vc_y > 0) {
1459 vc->vc_pos -= vc->vc_size_row;
1461 vc->vc_need_wrap = 0;
1464 static inline void cr(struct vc_data *vc)
1466 vc->vc_pos -= vc->vc_x << 1;
1467 vc->vc_need_wrap = vc->vc_x = 0;
1468 notify_write(vc, '\r');
1471 static inline void bs(struct vc_data *vc)
1476 vc->vc_need_wrap = 0;
1477 notify_write(vc, '\b');
1481 static inline void del(struct vc_data *vc)
1486 static void csi_J(struct vc_data *vc, int vpar)
1489 unsigned short * start;
1492 case 0: /* erase from cursor to end of display */
1493 vc_uniscr_clear_line(vc, vc->vc_x,
1494 vc->vc_cols - vc->vc_x);
1495 vc_uniscr_clear_lines(vc, vc->vc_y + 1,
1496 vc->vc_rows - vc->vc_y - 1);
1497 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1498 start = (unsigned short *)vc->vc_pos;
1500 case 1: /* erase from start to cursor */
1501 vc_uniscr_clear_line(vc, 0, vc->vc_x + 1);
1502 vc_uniscr_clear_lines(vc, 0, vc->vc_y);
1503 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1504 start = (unsigned short *)vc->vc_origin;
1506 case 2: /* erase whole display */
1507 case 3: /* (and scrollback buffer later) */
1508 vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
1509 count = vc->vc_cols * vc->vc_rows;
1510 start = (unsigned short *)vc->vc_origin;
1515 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1518 flush_scrollback(vc);
1519 if (con_is_visible(vc))
1521 } else if (con_should_update(vc))
1522 do_update_region(vc, (unsigned long) start, count);
1523 vc->vc_need_wrap = 0;
1526 static void csi_K(struct vc_data *vc, int vpar)
1529 unsigned short *start = (unsigned short *)vc->vc_pos;
1533 case 0: /* erase from cursor to end of line */
1535 count = vc->vc_cols - vc->vc_x;
1537 case 1: /* erase from start of line to cursor */
1539 count = vc->vc_x + 1;
1541 case 2: /* erase whole line */
1543 count = vc->vc_cols;
1548 vc_uniscr_clear_line(vc, vc->vc_x + offset, count);
1549 scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count);
1550 vc->vc_need_wrap = 0;
1551 if (con_should_update(vc))
1552 do_update_region(vc, (unsigned long)(start + offset), count);
1555 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1561 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1563 vc_uniscr_clear_line(vc, vc->vc_x, count);
1564 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1565 if (con_should_update(vc))
1566 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1567 vc->vc_need_wrap = 0;
1570 static void default_attr(struct vc_data *vc)
1572 vc->vc_intensity = 1;
1574 vc->vc_underline = 0;
1577 vc->vc_color = vc->vc_def_color;
1580 struct rgb { u8 r; u8 g; u8 b; };
1582 static void rgb_from_256(int i, struct rgb *c)
1584 if (i < 8) { /* Standard colours. */
1585 c->r = i&1 ? 0xaa : 0x00;
1586 c->g = i&2 ? 0xaa : 0x00;
1587 c->b = i&4 ? 0xaa : 0x00;
1588 } else if (i < 16) {
1589 c->r = i&1 ? 0xff : 0x55;
1590 c->g = i&2 ? 0xff : 0x55;
1591 c->b = i&4 ? 0xff : 0x55;
1592 } else if (i < 232) { /* 6x6x6 colour cube. */
1593 c->r = (i - 16) / 36 * 85 / 2;
1594 c->g = (i - 16) / 6 % 6 * 85 / 2;
1595 c->b = (i - 16) % 6 * 85 / 2;
1596 } else /* Grayscale ramp. */
1597 c->r = c->g = c->b = i * 10 - 2312;
1600 static void rgb_foreground(struct vc_data *vc, const struct rgb *c)
1602 u8 hue = 0, max = max3(c->r, c->g, c->b);
1611 if (hue == 7 && max <= 0x55) {
1613 vc->vc_intensity = 2;
1614 } else if (max > 0xaa)
1615 vc->vc_intensity = 2;
1617 vc->vc_intensity = 1;
1619 vc->vc_color = (vc->vc_color & 0xf0) | hue;
1622 static void rgb_background(struct vc_data *vc, const struct rgb *c)
1624 /* For backgrounds, err on the dark side. */
1625 vc->vc_color = (vc->vc_color & 0x0f)
1626 | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3;
1630 * ITU T.416 Higher colour modes. They break the usual properties of SGR codes
1631 * and thus need to be detected and ignored by hand. Strictly speaking, that
1632 * standard also wants : rather than ; as separators, contrary to ECMA-48, but
1633 * no one produces such codes and almost no one accepts them.
1635 * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in
1638 static int vc_t416_color(struct vc_data *vc, int i,
1639 void(*set_color)(struct vc_data *vc, const struct rgb *c))
1644 if (i > vc->vc_npar)
1647 if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) {
1650 rgb_from_256(vc->vc_par[i], &c);
1651 } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) {
1653 c.r = vc->vc_par[i + 1];
1654 c.g = vc->vc_par[i + 2];
1655 c.b = vc->vc_par[i + 3];
1665 /* console_lock is held */
1666 static void csi_m(struct vc_data *vc)
1670 for (i = 0; i <= vc->vc_npar; i++)
1671 switch (vc->vc_par[i]) {
1672 case 0: /* all attributes off */
1676 vc->vc_intensity = 2;
1679 vc->vc_intensity = 0;
1686 * No console drivers support double underline, so
1687 * convert it to a single underline.
1690 vc->vc_underline = 1;
1698 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1699 * Select primary font, don't display control chars if
1700 * defined, don't set bit 8 on output.
1702 vc->vc_translate = set_translate(vc->vc_charset == 0
1704 : vc->vc_G1_charset, vc);
1705 vc->vc_disp_ctrl = 0;
1706 vc->vc_toggle_meta = 0;
1708 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1709 * Select first alternate font, lets chars < 32 be
1710 * displayed as ROM chars.
1712 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1713 vc->vc_disp_ctrl = 1;
1714 vc->vc_toggle_meta = 0;
1716 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1717 * Select second alternate font, toggle high bit
1718 * before displaying as ROM char.
1720 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1721 vc->vc_disp_ctrl = 1;
1722 vc->vc_toggle_meta = 1;
1725 vc->vc_intensity = 1;
1731 vc->vc_underline = 0;
1740 i = vc_t416_color(vc, i, rgb_foreground);
1743 i = vc_t416_color(vc, i, rgb_background);
1746 vc->vc_color = (vc->vc_def_color & 0x0f) |
1747 (vc->vc_color & 0xf0);
1750 vc->vc_color = (vc->vc_def_color & 0xf0) |
1751 (vc->vc_color & 0x0f);
1754 if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) {
1755 if (vc->vc_par[i] < 100)
1756 vc->vc_intensity = 2;
1757 vc->vc_par[i] -= 60;
1759 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1760 vc->vc_color = color_table[vc->vc_par[i] - 30]
1761 | (vc->vc_color & 0xf0);
1762 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1763 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1764 | (vc->vc_color & 0x0f);
1770 static void respond_string(const char *p, struct tty_port *port)
1773 tty_insert_flip_char(port, *p, 0);
1776 tty_schedule_flip(port);
1779 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1783 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1784 respond_string(buf, tty->port);
1787 static inline void status_report(struct tty_struct *tty)
1789 respond_string("\033[0n", tty->port); /* Terminal ok */
1792 static inline void respond_ID(struct tty_struct *tty)
1794 respond_string(VT102ID, tty->port);
1797 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1801 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1803 respond_string(buf, tty->port);
1806 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1807 int mouse_reporting(void)
1809 return vc_cons[fg_console].d->vc_report_mouse;
1812 /* console_lock is held */
1813 static void set_mode(struct vc_data *vc, int on_off)
1817 for (i = 0; i <= vc->vc_npar; i++)
1819 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1820 case 1: /* Cursor keys send ^[Ox/^[[x */
1822 set_kbd(vc, decckm);
1824 clr_kbd(vc, decckm);
1826 case 3: /* 80/132 mode switch unimplemented */
1828 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1829 /* this alone does not suffice; some user mode
1830 utility has to change the hardware regs */
1833 case 5: /* Inverted screen on/off */
1834 if (vc->vc_decscnm != on_off) {
1835 vc->vc_decscnm = on_off;
1836 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1840 case 6: /* Origin relative/absolute */
1841 vc->vc_decom = on_off;
1844 case 7: /* Autowrap on/off */
1845 vc->vc_decawm = on_off;
1847 case 8: /* Autorepeat on/off */
1849 set_kbd(vc, decarm);
1851 clr_kbd(vc, decarm);
1854 vc->vc_report_mouse = on_off ? 1 : 0;
1856 case 25: /* Cursor on/off */
1857 vc->vc_deccm = on_off;
1860 vc->vc_report_mouse = on_off ? 2 : 0;
1864 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1865 case 3: /* Monitor (display ctrls) */
1866 vc->vc_disp_ctrl = on_off;
1868 case 4: /* Insert Mode on/off */
1869 vc->vc_decim = on_off;
1871 case 20: /* Lf, Enter == CrLf/Lf */
1881 /* console_lock is held */
1882 static void setterm_command(struct vc_data *vc)
1884 switch(vc->vc_par[0]) {
1885 case 1: /* set color for underline mode */
1886 if (vc->vc_can_do_color &&
1887 vc->vc_par[1] < 16) {
1888 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1889 if (vc->vc_underline)
1893 case 2: /* set color for half intensity mode */
1894 if (vc->vc_can_do_color &&
1895 vc->vc_par[1] < 16) {
1896 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1897 if (vc->vc_intensity == 0)
1901 case 8: /* store colors as defaults */
1902 vc->vc_def_color = vc->vc_attr;
1903 if (vc->vc_hi_font_mask == 0x100)
1904 vc->vc_def_color >>= 1;
1908 case 9: /* set blanking interval */
1909 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1910 poke_blanked_console();
1912 case 10: /* set bell frequency in Hz */
1913 if (vc->vc_npar >= 1)
1914 vc->vc_bell_pitch = vc->vc_par[1];
1916 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1918 case 11: /* set bell duration in msec */
1919 if (vc->vc_npar >= 1)
1920 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1921 msecs_to_jiffies(vc->vc_par[1]) : 0;
1923 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1925 case 12: /* bring specified console to the front */
1926 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1927 set_console(vc->vc_par[1] - 1);
1929 case 13: /* unblank the screen */
1930 poke_blanked_console();
1932 case 14: /* set vesa powerdown interval */
1933 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1935 case 15: /* activate the previous console */
1936 set_console(last_console);
1938 case 16: /* set cursor blink duration in msec */
1939 if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
1940 vc->vc_par[1] <= USHRT_MAX)
1941 vc->vc_cur_blink_ms = vc->vc_par[1];
1943 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
1948 /* console_lock is held */
1949 static void csi_at(struct vc_data *vc, unsigned int nr)
1951 if (nr > vc->vc_cols - vc->vc_x)
1952 nr = vc->vc_cols - vc->vc_x;
1955 insert_char(vc, nr);
1958 /* console_lock is held */
1959 static void csi_L(struct vc_data *vc, unsigned int nr)
1961 if (nr > vc->vc_rows - vc->vc_y)
1962 nr = vc->vc_rows - vc->vc_y;
1965 con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_DOWN, nr);
1966 vc->vc_need_wrap = 0;
1969 /* console_lock is held */
1970 static void csi_P(struct vc_data *vc, unsigned int nr)
1972 if (nr > vc->vc_cols - vc->vc_x)
1973 nr = vc->vc_cols - vc->vc_x;
1976 delete_char(vc, nr);
1979 /* console_lock is held */
1980 static void csi_M(struct vc_data *vc, unsigned int nr)
1982 if (nr > vc->vc_rows - vc->vc_y)
1983 nr = vc->vc_rows - vc->vc_y;
1986 con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_UP, nr);
1987 vc->vc_need_wrap = 0;
1990 /* console_lock is held (except via vc_init->reset_terminal */
1991 static void save_cur(struct vc_data *vc)
1993 vc->vc_saved_x = vc->vc_x;
1994 vc->vc_saved_y = vc->vc_y;
1995 vc->vc_s_intensity = vc->vc_intensity;
1996 vc->vc_s_italic = vc->vc_italic;
1997 vc->vc_s_underline = vc->vc_underline;
1998 vc->vc_s_blink = vc->vc_blink;
1999 vc->vc_s_reverse = vc->vc_reverse;
2000 vc->vc_s_charset = vc->vc_charset;
2001 vc->vc_s_color = vc->vc_color;
2002 vc->vc_saved_G0 = vc->vc_G0_charset;
2003 vc->vc_saved_G1 = vc->vc_G1_charset;
2006 /* console_lock is held */
2007 static void restore_cur(struct vc_data *vc)
2009 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
2010 vc->vc_intensity = vc->vc_s_intensity;
2011 vc->vc_italic = vc->vc_s_italic;
2012 vc->vc_underline = vc->vc_s_underline;
2013 vc->vc_blink = vc->vc_s_blink;
2014 vc->vc_reverse = vc->vc_s_reverse;
2015 vc->vc_charset = vc->vc_s_charset;
2016 vc->vc_color = vc->vc_s_color;
2017 vc->vc_G0_charset = vc->vc_saved_G0;
2018 vc->vc_G1_charset = vc->vc_saved_G1;
2019 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
2021 vc->vc_need_wrap = 0;
2024 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
2025 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
2028 /* console_lock is held (except via vc_init()) */
2029 static void reset_terminal(struct vc_data *vc, int do_clear)
2032 vc->vc_bottom = vc->vc_rows;
2033 vc->vc_state = ESnormal;
2035 vc->vc_translate = set_translate(LAT1_MAP, vc);
2036 vc->vc_G0_charset = LAT1_MAP;
2037 vc->vc_G1_charset = GRAF_MAP;
2039 vc->vc_need_wrap = 0;
2040 vc->vc_report_mouse = 0;
2041 vc->vc_utf = default_utf8;
2042 vc->vc_utf_count = 0;
2044 vc->vc_disp_ctrl = 0;
2045 vc->vc_toggle_meta = 0;
2050 vc->vc_deccm = global_cursor_default;
2053 vt_reset_keyboard(vc->vc_num);
2055 vc->vc_cursor_type = cur_default;
2056 vc->vc_complement_mask = vc->vc_s_complement_mask;
2061 vc->vc_tab_stop[0] =
2062 vc->vc_tab_stop[1] =
2063 vc->vc_tab_stop[2] =
2064 vc->vc_tab_stop[3] =
2065 vc->vc_tab_stop[4] =
2066 vc->vc_tab_stop[5] =
2067 vc->vc_tab_stop[6] =
2068 vc->vc_tab_stop[7] = 0x01010101;
2070 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
2071 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
2072 vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
2080 /* console_lock is held */
2081 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
2084 * Control characters can be used in the _middle_
2085 * of an escape sequence.
2087 if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */
2093 if (vc->vc_state == ESosc)
2094 vc->vc_state = ESnormal;
2095 else if (vc->vc_bell_duration)
2096 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
2102 vc->vc_pos -= (vc->vc_x << 1);
2103 while (vc->vc_x < vc->vc_cols - 1) {
2105 if (vc->vc_tab_stop[7 & (vc->vc_x >> 5)] & (1 << (vc->vc_x & 31)))
2108 vc->vc_pos += (vc->vc_x << 1);
2109 notify_write(vc, '\t');
2111 case 10: case 11: case 12:
2113 if (!is_kbd(vc, lnm))
2120 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2121 vc->vc_disp_ctrl = 1;
2125 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2126 vc->vc_disp_ctrl = 0;
2129 vc->vc_state = ESnormal;
2132 vc->vc_state = ESesc;
2138 vc->vc_state = ESsquare;
2141 switch(vc->vc_state) {
2143 vc->vc_state = ESnormal;
2146 vc->vc_state = ESsquare;
2149 vc->vc_state = ESnonstd;
2152 vc->vc_state = ESpercent;
2165 vc->vc_tab_stop[7 & (vc->vc_x >> 5)] |= (1 << (vc->vc_x & 31));
2177 vc->vc_state = ESsetG0;
2180 vc->vc_state = ESsetG1;
2183 vc->vc_state = EShash;
2186 reset_terminal(vc, 1);
2188 case '>': /* Numeric keypad */
2189 clr_kbd(vc, kbdapplic);
2191 case '=': /* Appl. keypad */
2192 set_kbd(vc, kbdapplic);
2197 if (c=='P') { /* palette escape sequence */
2198 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
2199 vc->vc_par[vc->vc_npar] = 0;
2201 vc->vc_state = ESpalette;
2203 } else if (c=='R') { /* reset palette */
2205 vc->vc_state = ESnormal;
2206 } else if (c>='0' && c<='9')
2207 vc->vc_state = ESosc;
2209 vc->vc_state = ESnormal;
2213 vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
2214 if (vc->vc_npar == 7) {
2215 int i = vc->vc_par[0] * 3, j = 1;
2216 vc->vc_palette[i] = 16 * vc->vc_par[j++];
2217 vc->vc_palette[i++] += vc->vc_par[j++];
2218 vc->vc_palette[i] = 16 * vc->vc_par[j++];
2219 vc->vc_palette[i++] += vc->vc_par[j++];
2220 vc->vc_palette[i] = 16 * vc->vc_par[j++];
2221 vc->vc_palette[i] += vc->vc_par[j];
2223 vc->vc_state = ESnormal;
2226 vc->vc_state = ESnormal;
2229 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
2230 vc->vc_par[vc->vc_npar] = 0;
2232 vc->vc_state = ESgetpars;
2233 if (c == '[') { /* Function key */
2234 vc->vc_state=ESfunckey;
2237 vc->vc_ques = (c == '?');
2241 if (c == ';' && vc->vc_npar < NPAR - 1) {
2244 } else if (c>='0' && c<='9') {
2245 vc->vc_par[vc->vc_npar] *= 10;
2246 vc->vc_par[vc->vc_npar] += c - '0';
2249 vc->vc_state = ESnormal;
2260 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
2262 vc->vc_cursor_type = cur_default;
2270 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
2272 vc->vc_complement_mask = vc->vc_s_complement_mask;
2278 if (vc->vc_par[0] == 5)
2280 else if (vc->vc_par[0] == 6)
2281 cursor_report(vc, tty);
2293 gotoxy(vc, vc->vc_par[0], vc->vc_y);
2298 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
2303 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
2308 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
2313 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
2318 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
2323 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
2328 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
2335 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
2338 csi_J(vc, vc->vc_par[0]);
2341 csi_K(vc, vc->vc_par[0]);
2344 csi_L(vc, vc->vc_par[0]);
2347 csi_M(vc, vc->vc_par[0]);
2350 csi_P(vc, vc->vc_par[0]);
2358 vc->vc_tab_stop[7 & (vc->vc_x >> 5)] &= ~(1 << (vc->vc_x & 31));
2359 else if (vc->vc_par[0] == 3) {
2360 vc->vc_tab_stop[0] =
2361 vc->vc_tab_stop[1] =
2362 vc->vc_tab_stop[2] =
2363 vc->vc_tab_stop[3] =
2364 vc->vc_tab_stop[4] =
2365 vc->vc_tab_stop[5] =
2366 vc->vc_tab_stop[6] =
2367 vc->vc_tab_stop[7] = 0;
2373 case 'q': /* DECLL - but only 3 leds */
2374 /* map 0,1,2,3 to 0,1,2,4 */
2375 if (vc->vc_par[0] < 4)
2376 vt_set_led_state(vc->vc_num,
2377 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
2383 vc->vc_par[1] = vc->vc_rows;
2384 /* Minimum allowed region is 2 lines */
2385 if (vc->vc_par[0] < vc->vc_par[1] &&
2386 vc->vc_par[1] <= vc->vc_rows) {
2387 vc->vc_top = vc->vc_par[0] - 1;
2388 vc->vc_bottom = vc->vc_par[1];
2399 csi_X(vc, vc->vc_par[0]);
2402 csi_at(vc, vc->vc_par[0]);
2404 case ']': /* setterm functions */
2405 setterm_command(vc);
2410 vc->vc_state = ESnormal;
2412 case '@': /* defined in ISO 2022 */
2415 case 'G': /* prelim official escape code */
2416 case '8': /* retained for compatibility */
2422 vc->vc_state = ESnormal;
2425 vc->vc_state = ESnormal;
2427 /* DEC screen alignment test. kludge :-) */
2428 vc->vc_video_erase_char =
2429 (vc->vc_video_erase_char & 0xff00) | 'E';
2431 vc->vc_video_erase_char =
2432 (vc->vc_video_erase_char & 0xff00) | ' ';
2433 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2438 vc->vc_G0_charset = GRAF_MAP;
2440 vc->vc_G0_charset = LAT1_MAP;
2442 vc->vc_G0_charset = IBMPC_MAP;
2444 vc->vc_G0_charset = USER_MAP;
2445 if (vc->vc_charset == 0)
2446 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2447 vc->vc_state = ESnormal;
2451 vc->vc_G1_charset = GRAF_MAP;
2453 vc->vc_G1_charset = LAT1_MAP;
2455 vc->vc_G1_charset = IBMPC_MAP;
2457 vc->vc_G1_charset = USER_MAP;
2458 if (vc->vc_charset == 1)
2459 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2460 vc->vc_state = ESnormal;
2465 vc->vc_state = ESnormal;
2469 /* is_double_width() is based on the wcwidth() implementation by
2470 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2471 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2478 static int ucs_cmp(const void *key, const void *elt)
2480 uint32_t ucs = *(uint32_t *)key;
2481 struct interval e = *(struct interval *) elt;
2485 else if (ucs < e.first)
2490 static int is_double_width(uint32_t ucs)
2492 static const struct interval double_width[] = {
2493 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2494 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2495 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2496 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2498 if (ucs < double_width[0].first ||
2499 ucs > double_width[ARRAY_SIZE(double_width) - 1].last)
2502 return bsearch(&ucs, double_width, ARRAY_SIZE(double_width),
2503 sizeof(struct interval), ucs_cmp) != NULL;
2506 static void con_flush(struct vc_data *vc, unsigned long draw_from,
2507 unsigned long draw_to, int *draw_x)
2512 vc->vc_sw->con_putcs(vc, (u16 *)draw_from,
2513 (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, *draw_x);
2517 /* acquires console_lock */
2518 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2520 int c, next_c, tc, ok, n = 0, draw_x = -1;
2521 unsigned int currcons;
2522 unsigned long draw_from = 0, draw_to = 0;
2524 unsigned char vc_attr;
2525 struct vt_notifier_param param;
2529 u16 himask, charmask;
2537 vc = tty->driver_data;
2539 pr_err("vt: argh, driver_data is NULL !\n");
2544 currcons = vc->vc_num;
2545 if (!vc_cons_allocated(currcons)) {
2546 /* could this happen? */
2547 pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
2552 himask = vc->vc_hi_font_mask;
2553 charmask = himask ? 0x1ff : 0xff;
2555 /* undraw cursor first */
2561 while (!tty->stopped && count) {
2571 /* Do no translation at all in control states */
2572 if (vc->vc_state != ESnormal) {
2574 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2575 /* Combine UTF-8 into Unicode in vc_utf_char.
2576 * vc_utf_count is the number of continuation bytes still
2577 * expected to arrive.
2578 * vc_npar is the number of continuation bytes arrived so
2582 if ((c & 0xc0) == 0x80) {
2583 /* Continuation byte received */
2584 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2585 if (vc->vc_utf_count) {
2586 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2588 if (--vc->vc_utf_count) {
2589 /* Still need some bytes */
2592 /* Got a whole character */
2593 c = vc->vc_utf_char;
2594 /* Reject overlong sequences */
2595 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2596 c > utf8_length_changes[vc->vc_npar])
2599 /* Unexpected continuation byte */
2600 vc->vc_utf_count = 0;
2604 /* Single ASCII byte or first byte of a sequence received */
2605 if (vc->vc_utf_count) {
2606 /* Continuation byte expected */
2608 vc->vc_utf_count = 0;
2610 } else if (c > 0x7f) {
2611 /* First byte of a multibyte sequence received */
2613 if ((c & 0xe0) == 0xc0) {
2614 vc->vc_utf_count = 1;
2615 vc->vc_utf_char = (c & 0x1f);
2616 } else if ((c & 0xf0) == 0xe0) {
2617 vc->vc_utf_count = 2;
2618 vc->vc_utf_char = (c & 0x0f);
2619 } else if ((c & 0xf8) == 0xf0) {
2620 vc->vc_utf_count = 3;
2621 vc->vc_utf_char = (c & 0x07);
2622 } else if ((c & 0xfc) == 0xf8) {
2623 vc->vc_utf_count = 4;
2624 vc->vc_utf_char = (c & 0x03);
2625 } else if ((c & 0xfe) == 0xfc) {
2626 vc->vc_utf_count = 5;
2627 vc->vc_utf_char = (c & 0x01);
2629 /* 254 and 255 are invalid */
2632 if (vc->vc_utf_count) {
2633 /* Still need some bytes */
2637 /* Nothing to do if an ASCII byte was received */
2639 /* End of UTF-8 decoding. */
2640 /* c is the received character, or U+FFFD for invalid sequences. */
2641 /* Replace invalid Unicode code points with U+FFFD too */
2642 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2645 } else { /* no utf or alternate charset mode */
2646 tc = vc_translate(vc, c);
2650 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2651 ¶m) == NOTIFY_STOP)
2654 /* If the original code was a control character we
2655 * only allow a glyph to be displayed if the code is
2656 * not normally used (such as for cursor movement) or
2657 * if the disp_ctrl mode has been explicitly enabled.
2658 * Certain characters (as given by the CTRL_ALWAYS
2659 * bitmap) are always displayed as control characters,
2660 * as the console would be pretty useless without
2661 * them; to display an arbitrary font position use the
2662 * direct-to-font zone in UTF-8 mode.
2664 ok = tc && (c >= 32 ||
2665 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2666 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2667 && (c != 127 || vc->vc_disp_ctrl)
2670 if (vc->vc_state == ESnormal && ok) {
2671 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2672 if (is_double_width(c))
2675 /* Now try to find out how to display it */
2676 tc = conv_uni_to_pc(vc, tc);
2677 if (tc & ~charmask) {
2678 if (tc == -1 || tc == -2) {
2679 continue; /* nothing to display */
2681 /* Glyph not found */
2682 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2683 /* In legacy mode use the glyph we get by a 1:1 mapping.
2684 This would make absolutely no sense with Unicode in mind,
2685 but do this for ASCII characters since a font may lack
2686 Unicode mapping info and we don't want to end up with
2687 having question marks only. */
2690 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2691 tc = conv_uni_to_pc(vc, 0xfffd);
2694 tc = conv_uni_to_pc(vc, '?');
2695 if (tc < 0) tc = '?';
2701 vc_attr = vc->vc_attr;
2703 /* invert vc_attr */
2704 if (!vc->vc_can_do_color) {
2705 vc_attr = (vc->vc_attr) ^ 0x08;
2706 } else if (vc->vc_hi_font_mask == 0x100) {
2707 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2709 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2711 con_flush(vc, draw_from, draw_to, &draw_x);
2716 if (vc->vc_need_wrap || vc->vc_decim)
2717 con_flush(vc, draw_from, draw_to,
2719 if (vc->vc_need_wrap) {
2725 vc_uniscr_putc(vc, next_c);
2727 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2728 (vc_attr << 8) + tc,
2729 (u16 *) vc->vc_pos);
2730 if (con_should_update(vc) && draw_x < 0) {
2732 draw_from = vc->vc_pos;
2734 if (vc->vc_x == vc->vc_cols - 1) {
2735 vc->vc_need_wrap = vc->vc_decawm;
2736 draw_to = vc->vc_pos + 2;
2739 draw_to = (vc->vc_pos += 2);
2742 if (!--width) break;
2744 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2745 if (tc < 0) tc = ' ';
2748 notify_write(vc, c);
2751 con_flush(vc, draw_from, draw_to, &draw_x);
2758 goto rescan_last_byte;
2762 con_flush(vc, draw_from, draw_to, &draw_x);
2763 do_con_trol(tty, vc, orig);
2765 con_flush(vc, draw_from, draw_to, &draw_x);
2766 vc_uniscr_debug_check(vc);
2767 console_conditional_schedule();
2774 * This is the console switching callback.
2776 * Doing console switching in a process context allows
2777 * us to do the switches asynchronously (needed when we want
2778 * to switch due to a keyboard interrupt). Synchronization
2779 * with other console code and prevention of re-entrancy is
2780 * ensured with console_lock.
2782 static void console_callback(struct work_struct *ignored)
2786 if (want_console >= 0) {
2787 if (want_console != fg_console &&
2788 vc_cons_allocated(want_console)) {
2789 hide_cursor(vc_cons[fg_console].d);
2790 change_console(vc_cons[want_console].d);
2791 /* we only changed when the console had already
2792 been allocated - a new console is not created
2793 in an interrupt routine */
2797 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2798 do_poke_blanked_console = 0;
2799 poke_blanked_console();
2801 if (scrollback_delta) {
2802 struct vc_data *vc = vc_cons[fg_console].d;
2804 if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta)
2805 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2806 scrollback_delta = 0;
2808 if (blank_timer_expired) {
2810 blank_timer_expired = 0;
2812 notify_update(vc_cons[fg_console].d);
2817 int set_console(int nr)
2819 struct vc_data *vc = vc_cons[fg_console].d;
2821 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2822 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2825 * Console switch will fail in console_callback() or
2826 * change_console() so there is no point scheduling
2829 * Existing set_console() users don't check the return
2830 * value so this shouldn't break anything
2836 schedule_console_callback();
2841 struct tty_driver *console_driver;
2843 #ifdef CONFIG_VT_CONSOLE
2846 * vt_kmsg_redirect() - Sets/gets the kernel message console
2847 * @new: The new virtual terminal number or -1 if the console should stay
2850 * By default, the kernel messages are always printed on the current virtual
2851 * console. However, the user may modify that default with the
2852 * TIOCL_SETKMSGREDIRECT ioctl call.
2854 * This function sets the kernel message console to be @new. It returns the old
2855 * virtual console number. The virtual terminal number 0 (both as parameter and
2856 * return value) means no redirection (i.e. always printed on the currently
2859 * The parameter -1 means that only the current console is returned, but the
2860 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2861 * case to make the code more understandable.
2863 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2864 * the parameter and always returns 0.
2866 int vt_kmsg_redirect(int new)
2868 static int kmsg_con;
2871 return xchg(&kmsg_con, new);
2877 * Console on virtual terminal
2879 * The console must be locked when we get here.
2882 static void vt_console_print(struct console *co, const char *b, unsigned count)
2884 struct vc_data *vc = vc_cons[fg_console].d;
2886 static DEFINE_SPINLOCK(printing_lock);
2887 const ushort *start;
2888 ushort start_x, cnt;
2891 /* console busy or not yet initialized */
2894 if (!spin_trylock(&printing_lock))
2897 kmsg_console = vt_get_kmsg_redirect();
2898 if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
2899 vc = vc_cons[kmsg_console - 1].d;
2901 if (!vc_cons_allocated(fg_console)) {
2903 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2907 if (vc->vc_mode != KD_TEXT)
2910 /* undraw cursor first */
2914 start = (ushort *)vc->vc_pos;
2919 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2920 if (cnt && con_is_visible(vc))
2921 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, start_x);
2923 if (c == 8) { /* backspace */
2925 start = (ushort *)vc->vc_pos;
2932 start = (ushort *)vc->vc_pos;
2934 if (c == 10 || c == 13)
2937 vc_uniscr_putc(vc, c);
2938 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2939 notify_write(vc, c);
2941 if (vc->vc_x == vc->vc_cols - 1) {
2942 vc->vc_need_wrap = 1;
2948 if (cnt && con_is_visible(vc))
2949 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, start_x);
2954 spin_unlock(&printing_lock);
2957 static struct tty_driver *vt_console_device(struct console *c, int *index)
2959 *index = c->index ? c->index-1 : fg_console;
2960 return console_driver;
2963 static struct console vt_console_driver = {
2965 .write = vt_console_print,
2966 .device = vt_console_device,
2967 .unblank = unblank_screen,
2968 .flags = CON_PRINTBUFFER,
2974 * Handling of Linux-specific VC ioctls
2978 * Generally a bit racy with respect to console_lock();.
2980 * There are some functions which don't need it.
2982 * There are some functions which can sleep for arbitrary periods
2983 * (paste_selection) but we don't need the lock there anyway.
2985 * set_selection has locking, and definitely needs it
2988 int tioclinux(struct tty_struct *tty, unsigned long arg)
2991 char __user *p = (char __user *)arg;
2995 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2997 if (get_user(type, p))
3005 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
3008 case TIOCL_PASTESEL:
3009 ret = paste_selection(tty);
3011 case TIOCL_UNBLANKSCREEN:
3016 case TIOCL_SELLOADLUT:
3018 ret = sel_loadlut(p);
3021 case TIOCL_GETSHIFTSTATE:
3024 * Make it possible to react to Shift+Mousebutton.
3025 * Note that 'shift_state' is an undocumented
3026 * kernel-internal variable; programs not closely
3027 * related to the kernel should not use this.
3029 data = vt_get_shift_state();
3030 ret = put_user(data, p);
3032 case TIOCL_GETMOUSEREPORTING:
3033 console_lock(); /* May be overkill */
3034 data = mouse_reporting();
3036 ret = put_user(data, p);
3038 case TIOCL_SETVESABLANK:
3040 ret = set_vesa_blanking(p);
3043 case TIOCL_GETKMSGREDIRECT:
3044 data = vt_get_kmsg_redirect();
3045 ret = put_user(data, p);
3047 case TIOCL_SETKMSGREDIRECT:
3048 if (!capable(CAP_SYS_ADMIN)) {
3051 if (get_user(data, p+1))
3054 vt_kmsg_redirect(data);
3057 case TIOCL_GETFGCONSOLE:
3058 /* No locking needed as this is a transiently
3059 correct return anyway if the caller hasn't
3060 disabled switching */
3063 case TIOCL_SCROLLCONSOLE:
3064 if (get_user(lines, (s32 __user *)(p+4))) {
3067 /* Need the console lock here. Note that lots
3068 of other calls need fixing before the lock
3069 is actually useful ! */
3071 scrollfront(vc_cons[fg_console].d, lines);
3076 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
3082 case TIOCL_BLANKEDSCREEN:
3083 ret = console_blanked;
3093 * /dev/ttyN handling
3096 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
3100 retval = do_con_write(tty, buf, count);
3101 con_flush_chars(tty);
3106 static int con_put_char(struct tty_struct *tty, unsigned char ch)
3109 return 0; /* n_r3964 calls put_char() from interrupt context */
3110 return do_con_write(tty, &ch, 1);
3113 static int con_write_room(struct tty_struct *tty)
3117 return 32768; /* No limit, really; we're not buffering */
3120 static int con_chars_in_buffer(struct tty_struct *tty)
3122 return 0; /* we're not buffering */
3126 * con_throttle and con_unthrottle are only used for
3127 * paste_selection(), which has to stuff in a large number of
3130 static void con_throttle(struct tty_struct *tty)
3134 static void con_unthrottle(struct tty_struct *tty)
3136 struct vc_data *vc = tty->driver_data;
3138 wake_up_interruptible(&vc->paste_wait);
3142 * Turn the Scroll-Lock LED on when the tty is stopped
3144 static void con_stop(struct tty_struct *tty)
3149 console_num = tty->index;
3150 if (!vc_cons_allocated(console_num))
3152 vt_kbd_con_stop(console_num);
3156 * Turn the Scroll-Lock LED off when the console is started
3158 static void con_start(struct tty_struct *tty)
3163 console_num = tty->index;
3164 if (!vc_cons_allocated(console_num))
3166 vt_kbd_con_start(console_num);
3169 static void con_flush_chars(struct tty_struct *tty)
3173 if (in_interrupt()) /* from flush_to_ldisc */
3176 /* if we race with con_close(), vt may be null */
3178 vc = tty->driver_data;
3185 * Allocate the console screen memory.
3187 static int con_install(struct tty_driver *driver, struct tty_struct *tty)
3189 unsigned int currcons = tty->index;
3194 ret = vc_allocate(currcons);
3198 vc = vc_cons[currcons].d;
3200 /* Still being freed */
3206 ret = tty_port_install(&vc->port, driver, tty);
3210 tty->driver_data = vc;
3213 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
3214 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
3215 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
3218 tty->termios.c_iflag |= IUTF8;
3220 tty->termios.c_iflag &= ~IUTF8;
3226 static int con_open(struct tty_struct *tty, struct file *filp)
3228 /* everything done in install */
3233 static void con_close(struct tty_struct *tty, struct file *filp)
3235 /* Nothing to do - we defer to shutdown */
3238 static void con_shutdown(struct tty_struct *tty)
3240 struct vc_data *vc = tty->driver_data;
3243 vc->port.tty = NULL;
3247 static int default_color = 7; /* white */
3248 static int default_italic_color = 2; // green (ASCII)
3249 static int default_underline_color = 3; // cyan (ASCII)
3250 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
3251 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
3252 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
3254 static void vc_init(struct vc_data *vc, unsigned int rows,
3255 unsigned int cols, int do_clear)
3261 vc->vc_size_row = cols << 1;
3262 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
3265 vc->vc_pos = vc->vc_origin;
3267 for (j=k=0; j<16; j++) {
3268 vc->vc_palette[k++] = default_red[j] ;
3269 vc->vc_palette[k++] = default_grn[j] ;
3270 vc->vc_palette[k++] = default_blu[j] ;
3272 vc->vc_def_color = default_color;
3273 vc->vc_ulcolor = default_underline_color;
3274 vc->vc_itcolor = default_italic_color;
3275 vc->vc_halfcolor = 0x08; /* grey */
3276 init_waitqueue_head(&vc->paste_wait);
3277 reset_terminal(vc, do_clear);
3281 * This routine initializes console interrupts, and does nothing
3282 * else. If you want the screen to clear, call tty_write with
3283 * the appropriate escape-sequence.
3286 static int __init con_init(void)
3288 const char *display_desc = NULL;
3290 unsigned int currcons = 0, i;
3295 display_desc = conswitchp->con_startup();
3296 if (!display_desc) {
3302 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3303 struct con_driver *con_driver = ®istered_con_driver[i];
3305 if (con_driver->con == NULL) {
3306 con_driver->con = conswitchp;
3307 con_driver->desc = display_desc;
3308 con_driver->flag = CON_DRIVER_FLAG_INIT;
3309 con_driver->first = 0;
3310 con_driver->last = MAX_NR_CONSOLES - 1;
3315 for (i = 0; i < MAX_NR_CONSOLES; i++)
3316 con_driver_map[i] = conswitchp;
3318 if (blankinterval) {
3319 blank_state = blank_normal_wait;
3320 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3323 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
3324 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
3325 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
3326 tty_port_init(&vc->port);
3327 visual_init(vc, currcons, 1);
3328 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
3329 vc_init(vc, vc->vc_rows, vc->vc_cols,
3330 currcons || !vc->vc_sw->con_save_screen);
3332 currcons = fg_console = 0;
3333 master_display_fg = vc = vc_cons[currcons].d;
3336 gotoxy(vc, vc->vc_x, vc->vc_y);
3339 pr_info("Console: %s %s %dx%d\n",
3340 vc->vc_can_do_color ? "colour" : "mono",
3341 display_desc, vc->vc_cols, vc->vc_rows);
3346 #ifdef CONFIG_VT_CONSOLE
3347 register_console(&vt_console_driver);
3351 console_initcall(con_init);
3353 static const struct tty_operations con_ops = {
3354 .install = con_install,
3358 .write_room = con_write_room,
3359 .put_char = con_put_char,
3360 .flush_chars = con_flush_chars,
3361 .chars_in_buffer = con_chars_in_buffer,
3363 #ifdef CONFIG_COMPAT
3364 .compat_ioctl = vt_compat_ioctl,
3368 .throttle = con_throttle,
3369 .unthrottle = con_unthrottle,
3370 .resize = vt_resize,
3371 .shutdown = con_shutdown
3374 static struct cdev vc0_cdev;
3376 static ssize_t show_tty_active(struct device *dev,
3377 struct device_attribute *attr, char *buf)
3379 return sprintf(buf, "tty%d\n", fg_console + 1);
3381 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
3383 static struct attribute *vt_dev_attrs[] = {
3384 &dev_attr_active.attr,
3388 ATTRIBUTE_GROUPS(vt_dev);
3390 int __init vty_init(const struct file_operations *console_fops)
3392 cdev_init(&vc0_cdev, console_fops);
3393 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
3394 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
3395 panic("Couldn't register /dev/tty0 driver\n");
3396 tty0dev = device_create_with_groups(tty_class, NULL,
3397 MKDEV(TTY_MAJOR, 0), NULL,
3398 vt_dev_groups, "tty0");
3399 if (IS_ERR(tty0dev))
3404 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
3405 if (!console_driver)
3406 panic("Couldn't allocate console driver\n");
3408 console_driver->name = "tty";
3409 console_driver->name_base = 1;
3410 console_driver->major = TTY_MAJOR;
3411 console_driver->minor_start = 1;
3412 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
3413 console_driver->init_termios = tty_std_termios;
3415 console_driver->init_termios.c_iflag |= IUTF8;
3416 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
3417 tty_set_operations(console_driver, &con_ops);
3418 if (tty_register_driver(console_driver))
3419 panic("Couldn't register console driver\n");
3422 #ifdef CONFIG_MDA_CONSOLE
3428 #ifndef VT_SINGLE_DRIVER
3430 static struct class *vtconsole_class;
3432 static int do_bind_con_driver(const struct consw *csw, int first, int last,
3435 struct module *owner = csw->owner;
3436 const char *desc = NULL;
3437 struct con_driver *con_driver;
3438 int i, j = -1, k = -1, retval = -ENODEV;
3440 if (!try_module_get(owner))
3443 WARN_CONSOLE_UNLOCKED();
3445 /* check if driver is registered */
3446 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3447 con_driver = ®istered_con_driver[i];
3449 if (con_driver->con == csw) {
3450 desc = con_driver->desc;
3459 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
3461 con_driver->flag |= CON_DRIVER_FLAG_INIT;
3466 module_put(conswitchp->owner);
3468 __module_get(owner);
3472 first = max(first, con_driver->first);
3473 last = min(last, con_driver->last);
3475 for (i = first; i <= last; i++) {
3477 struct vc_data *vc = vc_cons[i].d;
3479 if (con_driver_map[i])
3480 module_put(con_driver_map[i]->owner);
3481 __module_get(owner);
3482 con_driver_map[i] = csw;
3484 if (!vc || !vc->vc_sw)
3489 if (con_is_visible(vc)) {
3494 old_was_color = vc->vc_can_do_color;
3495 vc->vc_sw->con_deinit(vc);
3496 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3497 visual_init(vc, i, 0);
3501 /* If the console changed between mono <-> color, then
3502 * the attributes in the screenbuf will be wrong. The
3503 * following resets all attributes to something sane.
3505 if (old_was_color != vc->vc_can_do_color)
3506 clear_buffer_attributes(vc);
3509 pr_info("Console: switching ");
3511 pr_cont("consoles %d-%d ", first + 1, last + 1);
3513 struct vc_data *vc = vc_cons[j].d;
3515 pr_cont("to %s %s %dx%d\n",
3516 vc->vc_can_do_color ? "colour" : "mono",
3517 desc, vc->vc_cols, vc->vc_rows);
3524 pr_cont("to %s\n", desc);
3534 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3535 /* unlocked version of unbind_con_driver() */
3536 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3538 struct module *owner = csw->owner;
3539 const struct consw *defcsw = NULL;
3540 struct con_driver *con_driver = NULL, *con_back = NULL;
3541 int i, retval = -ENODEV;
3543 if (!try_module_get(owner))
3546 WARN_CONSOLE_UNLOCKED();
3548 /* check if driver is registered and if it is unbindable */
3549 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3550 con_driver = ®istered_con_driver[i];
3552 if (con_driver->con == csw &&
3553 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3564 /* check if backup driver exists */
3565 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3566 con_back = ®istered_con_driver[i];
3568 if (con_back->con && con_back->con != csw) {
3569 defcsw = con_back->con;
3578 if (!con_is_bound(csw))
3581 first = max(first, con_driver->first);
3582 last = min(last, con_driver->last);
3584 for (i = first; i <= last; i++) {
3585 if (con_driver_map[i] == csw) {
3586 module_put(csw->owner);
3587 con_driver_map[i] = NULL;
3591 if (!con_is_bound(defcsw)) {
3592 const struct consw *defconsw = conswitchp;
3594 defcsw->con_startup();
3595 con_back->flag |= CON_DRIVER_FLAG_INIT;
3597 * vgacon may change the default driver to point
3598 * to dummycon, we restore it here...
3600 conswitchp = defconsw;
3603 if (!con_is_bound(csw))
3604 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3606 /* ignore return value, binding should not fail */
3607 do_bind_con_driver(defcsw, first, last, deflt);
3613 EXPORT_SYMBOL_GPL(do_unbind_con_driver);
3615 static int vt_bind(struct con_driver *con)
3617 const struct consw *defcsw = NULL, *csw = NULL;
3618 int i, more = 1, first = -1, last = -1, deflt = 0;
3620 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3625 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3626 struct con_driver *con = ®istered_con_driver[i];
3628 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3640 for (i = con->first; i <= con->last; i++) {
3641 if (con_driver_map[i] == defcsw) {
3646 } else if (first != -1)
3650 if (first == 0 && last == MAX_NR_CONSOLES -1)
3654 do_bind_con_driver(csw, first, last, deflt);
3665 static int vt_unbind(struct con_driver *con)
3667 const struct consw *csw = NULL;
3668 int i, more = 1, first = -1, last = -1, deflt = 0;
3671 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
3679 for (i = con->first; i <= con->last; i++) {
3680 if (con_driver_map[i] == csw) {
3685 } else if (first != -1)
3689 if (first == 0 && last == MAX_NR_CONSOLES -1)
3693 ret = do_unbind_con_driver(csw, first, last, deflt);
3707 static inline int vt_bind(struct con_driver *con)
3711 static inline int vt_unbind(struct con_driver *con)
3715 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3717 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3718 const char *buf, size_t count)
3720 struct con_driver *con = dev_get_drvdata(dev);
3721 int bind = simple_strtoul(buf, NULL, 0);
3735 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3738 struct con_driver *con = dev_get_drvdata(dev);
3739 int bind = con_is_bound(con->con);
3741 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3744 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3747 struct con_driver *con = dev_get_drvdata(dev);
3749 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3750 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3755 static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind);
3756 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
3758 static struct attribute *con_dev_attrs[] = {
3759 &dev_attr_bind.attr,
3760 &dev_attr_name.attr,
3764 ATTRIBUTE_GROUPS(con_dev);
3766 static int vtconsole_init_device(struct con_driver *con)
3768 con->flag |= CON_DRIVER_FLAG_ATTR;
3772 static void vtconsole_deinit_device(struct con_driver *con)
3774 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3778 * con_is_bound - checks if driver is bound to the console
3779 * @csw: console driver
3781 * RETURNS: zero if unbound, nonzero if bound
3783 * Drivers can call this and if zero, they should release
3784 * all resources allocated on con_startup()
3786 int con_is_bound(const struct consw *csw)
3790 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3791 if (con_driver_map[i] == csw) {
3799 EXPORT_SYMBOL(con_is_bound);
3802 * con_debug_enter - prepare the console for the kernel debugger
3803 * @sw: console driver
3805 * Called when the console is taken over by the kernel debugger, this
3806 * function needs to save the current console state, then put the console
3807 * into a state suitable for the kernel debugger.
3810 * Zero on success, nonzero if a failure occurred when trying to prepare
3811 * the console for the debugger.
3813 int con_debug_enter(struct vc_data *vc)
3817 saved_fg_console = fg_console;
3818 saved_last_console = last_console;
3819 saved_want_console = want_console;
3820 saved_vc_mode = vc->vc_mode;
3821 saved_console_blanked = console_blanked;
3822 vc->vc_mode = KD_TEXT;
3823 console_blanked = 0;
3824 if (vc->vc_sw->con_debug_enter)
3825 ret = vc->vc_sw->con_debug_enter(vc);
3826 #ifdef CONFIG_KGDB_KDB
3827 /* Set the initial LINES variable if it is not already set */
3828 if (vc->vc_rows < 999) {
3831 const char *setargs[3] = {
3836 if (kdbgetintenv(setargs[0], &linecount)) {
3837 snprintf(lns, 4, "%i", vc->vc_rows);
3838 kdb_set(2, setargs);
3841 if (vc->vc_cols < 999) {
3844 const char *setargs[3] = {
3849 if (kdbgetintenv(setargs[0], &colcount)) {
3850 snprintf(cols, 4, "%i", vc->vc_cols);
3851 kdb_set(2, setargs);
3854 #endif /* CONFIG_KGDB_KDB */
3857 EXPORT_SYMBOL_GPL(con_debug_enter);
3860 * con_debug_leave - restore console state
3861 * @sw: console driver
3863 * Restore the console state to what it was before the kernel debugger
3867 * Zero on success, nonzero if a failure occurred when trying to restore
3870 int con_debug_leave(void)
3875 fg_console = saved_fg_console;
3876 last_console = saved_last_console;
3877 want_console = saved_want_console;
3878 console_blanked = saved_console_blanked;
3879 vc_cons[fg_console].d->vc_mode = saved_vc_mode;
3881 vc = vc_cons[fg_console].d;
3882 if (vc->vc_sw->con_debug_leave)
3883 ret = vc->vc_sw->con_debug_leave(vc);
3886 EXPORT_SYMBOL_GPL(con_debug_leave);
3888 static int do_register_con_driver(const struct consw *csw, int first, int last)
3890 struct module *owner = csw->owner;
3891 struct con_driver *con_driver;
3895 WARN_CONSOLE_UNLOCKED();
3897 if (!try_module_get(owner))
3900 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3901 con_driver = ®istered_con_driver[i];
3903 /* already registered */
3904 if (con_driver->con == csw) {
3910 desc = csw->con_startup();
3918 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3919 con_driver = ®istered_con_driver[i];
3921 if (con_driver->con == NULL &&
3922 !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) {
3923 con_driver->con = csw;
3924 con_driver->desc = desc;
3925 con_driver->node = i;
3926 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3927 CON_DRIVER_FLAG_INIT;
3928 con_driver->first = first;
3929 con_driver->last = last;
3939 device_create_with_groups(vtconsole_class, NULL,
3940 MKDEV(0, con_driver->node),
3941 con_driver, con_dev_groups,
3942 "vtcon%i", con_driver->node);
3943 if (IS_ERR(con_driver->dev)) {
3944 pr_warn("Unable to create device for %s; errno = %ld\n",
3945 con_driver->desc, PTR_ERR(con_driver->dev));
3946 con_driver->dev = NULL;
3948 vtconsole_init_device(con_driver);
3958 * do_unregister_con_driver - unregister console driver from console layer
3959 * @csw: console driver
3961 * DESCRIPTION: All drivers that registers to the console layer must
3962 * call this function upon exit, or if the console driver is in a state
3963 * where it won't be able to handle console services, such as the
3964 * framebuffer console without loaded framebuffer drivers.
3966 * The driver must unbind first prior to unregistration.
3968 int do_unregister_con_driver(const struct consw *csw)
3972 /* cannot unregister a bound driver */
3973 if (con_is_bound(csw))
3976 if (csw == conswitchp)
3979 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3980 struct con_driver *con_driver = ®istered_con_driver[i];
3982 if (con_driver->con == csw) {
3984 * Defer the removal of the sysfs entries since that
3985 * will acquire the kernfs s_active lock and we can't
3986 * acquire this lock while holding the console lock:
3987 * the unbind sysfs entry imposes already the opposite
3988 * order. Reset con already here to prevent any later
3989 * lookup to succeed and mark this slot as zombie, so
3990 * it won't get reused until we complete the removal
3991 * in the deferred work.
3993 con_driver->con = NULL;
3994 con_driver->flag = CON_DRIVER_FLAG_ZOMBIE;
3995 schedule_work(&con_driver_unregister_work);
4003 EXPORT_SYMBOL_GPL(do_unregister_con_driver);
4005 static void con_driver_unregister_callback(struct work_struct *ignored)
4011 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
4012 struct con_driver *con_driver = ®istered_con_driver[i];
4014 if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE))
4019 vtconsole_deinit_device(con_driver);
4020 device_destroy(vtconsole_class, MKDEV(0, con_driver->node));
4024 if (WARN_ON_ONCE(con_driver->con))
4025 con_driver->con = NULL;
4026 con_driver->desc = NULL;
4027 con_driver->dev = NULL;
4028 con_driver->node = 0;
4029 WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE);
4030 con_driver->flag = 0;
4031 con_driver->first = 0;
4032 con_driver->last = 0;
4039 * If we support more console drivers, this function is used
4040 * when a driver wants to take over some existing consoles
4041 * and become default driver for newly opened ones.
4043 * do_take_over_console is basically a register followed by unbind
4045 int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
4049 err = do_register_con_driver(csw, first, last);
4051 * If we get an busy error we still want to bind the console driver
4052 * and return success, as we may have unbound the console driver
4053 * but not unregistered it.
4058 do_bind_con_driver(csw, first, last, deflt);
4062 EXPORT_SYMBOL_GPL(do_take_over_console);
4066 * give_up_console is a wrapper to unregister_con_driver. It will only
4067 * work if driver is fully unbound.
4069 void give_up_console(const struct consw *csw)
4072 do_unregister_con_driver(csw);
4076 static int __init vtconsole_class_init(void)
4080 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
4081 if (IS_ERR(vtconsole_class)) {
4082 pr_warn("Unable to create vt console class; errno = %ld\n",
4083 PTR_ERR(vtconsole_class));
4084 vtconsole_class = NULL;
4087 /* Add system drivers to sysfs */
4088 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
4089 struct con_driver *con = ®istered_con_driver[i];
4091 if (con->con && !con->dev) {
4093 device_create_with_groups(vtconsole_class, NULL,
4094 MKDEV(0, con->node),
4095 con, con_dev_groups,
4096 "vtcon%i", con->node);
4098 if (IS_ERR(con->dev)) {
4099 pr_warn("Unable to create device for %s; errno = %ld\n",
4100 con->desc, PTR_ERR(con->dev));
4103 vtconsole_init_device(con);
4110 postcore_initcall(vtconsole_class_init);
4118 static int set_vesa_blanking(char __user *p)
4122 if (get_user(mode, p + 1))
4125 vesa_blank_mode = (mode < 4) ? mode : 0;
4129 void do_blank_screen(int entering_gfx)
4131 struct vc_data *vc = vc_cons[fg_console].d;
4134 WARN_CONSOLE_UNLOCKED();
4136 if (console_blanked) {
4137 if (blank_state == blank_vesa_wait) {
4138 blank_state = blank_off;
4139 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
4144 /* entering graphics mode? */
4148 vc->vc_sw->con_blank(vc, -1, 1);
4149 console_blanked = fg_console + 1;
4150 blank_state = blank_off;
4155 if (blank_state != blank_normal_wait)
4157 blank_state = blank_off;
4159 /* don't blank graphics */
4160 if (vc->vc_mode != KD_TEXT) {
4161 console_blanked = fg_console + 1;
4166 del_timer_sync(&console_timer);
4167 blank_timer_expired = 0;
4170 /* In case we need to reset origin, blanking hook returns 1 */
4171 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
4172 console_blanked = fg_console + 1;
4176 if (console_blank_hook && console_blank_hook(1))
4179 if (vesa_off_interval && vesa_blank_mode) {
4180 blank_state = blank_vesa_wait;
4181 mod_timer(&console_timer, jiffies + vesa_off_interval);
4183 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
4185 EXPORT_SYMBOL(do_blank_screen);
4188 * Called by timer as well as from vt_console_driver
4190 void do_unblank_screen(int leaving_gfx)
4194 /* This should now always be called from a "sane" (read: can schedule)
4195 * context for the sake of the low level drivers, except in the special
4196 * case of oops_in_progress
4198 if (!oops_in_progress)
4201 WARN_CONSOLE_UNLOCKED();
4204 if (!console_blanked)
4206 if (!vc_cons_allocated(fg_console)) {
4208 pr_warn("unblank_screen: tty %d not allocated ??\n",
4212 vc = vc_cons[fg_console].d;
4213 if (vc->vc_mode != KD_TEXT)
4214 return; /* but leave console_blanked != 0 */
4216 if (blankinterval) {
4217 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
4218 blank_state = blank_normal_wait;
4221 console_blanked = 0;
4222 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
4223 /* Low-level driver cannot restore -> do it ourselves */
4225 if (console_blank_hook)
4226 console_blank_hook(0);
4229 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
4231 EXPORT_SYMBOL(do_unblank_screen);
4234 * This is called by the outside world to cause a forced unblank, mostly for
4235 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
4236 * call it with 1 as an argument and so force a mode restore... that may kill
4237 * X or at least garbage the screen but would also make the Oops visible...
4239 void unblank_screen(void)
4241 do_unblank_screen(0);
4245 * We defer the timer blanking to work queue so it can take the console mutex
4246 * (console operations can still happen at irq time, but only from printk which
4247 * has the console mutex. Not perfect yet, but better than no locking
4249 static void blank_screen_t(struct timer_list *unused)
4251 blank_timer_expired = 1;
4252 schedule_work(&console_work);
4255 void poke_blanked_console(void)
4257 WARN_CONSOLE_UNLOCKED();
4259 /* Add this so we quickly catch whoever might call us in a non
4260 * safe context. Nowadays, unblank_screen() isn't to be called in
4261 * atomic contexts and is allowed to schedule (with the special case
4262 * of oops_in_progress, but that isn't of any concern for this
4267 /* This isn't perfectly race free, but a race here would be mostly harmless,
4268 * at worse, we'll do a spurrious blank and it's unlikely
4270 del_timer(&console_timer);
4271 blank_timer_expired = 0;
4273 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
4275 if (console_blanked)
4277 else if (blankinterval) {
4278 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
4279 blank_state = blank_normal_wait;
4287 static void set_palette(struct vc_data *vc)
4289 WARN_CONSOLE_UNLOCKED();
4291 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette)
4292 vc->vc_sw->con_set_palette(vc, color_table);
4296 * Load palette into the DAC registers. arg points to a colour
4297 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
4300 int con_set_cmap(unsigned char __user *arg)
4303 unsigned char colormap[3*16];
4305 if (copy_from_user(colormap, arg, sizeof(colormap)))
4309 for (i = k = 0; i < 16; i++) {
4310 default_red[i] = colormap[k++];
4311 default_grn[i] = colormap[k++];
4312 default_blu[i] = colormap[k++];
4314 for (i = 0; i < MAX_NR_CONSOLES; i++) {
4315 if (!vc_cons_allocated(i))
4317 for (j = k = 0; j < 16; j++) {
4318 vc_cons[i].d->vc_palette[k++] = default_red[j];
4319 vc_cons[i].d->vc_palette[k++] = default_grn[j];
4320 vc_cons[i].d->vc_palette[k++] = default_blu[j];
4322 set_palette(vc_cons[i].d);
4329 int con_get_cmap(unsigned char __user *arg)
4332 unsigned char colormap[3*16];
4335 for (i = k = 0; i < 16; i++) {
4336 colormap[k++] = default_red[i];
4337 colormap[k++] = default_grn[i];
4338 colormap[k++] = default_blu[i];
4342 if (copy_to_user(arg, colormap, sizeof(colormap)))
4348 void reset_palette(struct vc_data *vc)
4351 for (j=k=0; j<16; j++) {
4352 vc->vc_palette[k++] = default_red[j];
4353 vc->vc_palette[k++] = default_grn[j];
4354 vc->vc_palette[k++] = default_blu[j];
4362 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4363 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4364 * depending on width) reserved for each character which is kinda wasty, but
4365 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4366 * is up to the actual low-level console-driver convert data into its favorite
4367 * format (maybe we should add a `fontoffset' field to the `display'
4368 * structure so we won't have to convert the fontdata all the time.
4372 #define max_font_size 65536
4374 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
4376 struct console_font font;
4381 font.data = kmalloc(max_font_size, GFP_KERNEL);
4388 if (vc->vc_mode != KD_TEXT)
4390 else if (vc->vc_sw->con_font_get)
4391 rc = vc->vc_sw->con_font_get(vc, &font);
4399 c = (font.width+7)/8 * 32 * font.charcount;
4401 if (op->data && font.charcount > op->charcount)
4403 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4404 if (font.width > op->width || font.height > op->height)
4407 if (font.width != 8)
4409 else if ((op->height && font.height > op->height) ||
4416 op->height = font.height;
4417 op->width = font.width;
4418 op->charcount = font.charcount;
4420 if (op->data && copy_to_user(op->data, font.data, c))
4428 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
4430 struct console_font font;
4434 if (vc->vc_mode != KD_TEXT)
4438 if (op->charcount > 512)
4440 if (op->width <= 0 || op->width > 32 || op->height > 32)
4442 size = (op->width+7)/8 * 32 * op->charcount;
4443 if (size > max_font_size)
4446 font.data = memdup_user(op->data, size);
4447 if (IS_ERR(font.data))
4448 return PTR_ERR(font.data);
4450 if (!op->height) { /* Need to guess font height [compat] */
4452 u8 *charmap = font.data;
4455 * If from KDFONTOP ioctl, don't allow things which can be done
4456 * in userland,so that we can get rid of this soon
4458 if (!(op->flags & KD_FONT_FLAG_OLD)) {
4463 for (h = 32; h > 0; h--)
4464 for (i = 0; i < op->charcount; i++)
4465 if (charmap[32*i+h-1])
4475 font.charcount = op->charcount;
4476 font.width = op->width;
4477 font.height = op->height;
4480 if (vc->vc_mode != KD_TEXT)
4482 else if (vc->vc_sw->con_font_set)
4483 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
4491 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
4493 struct console_font font = {.width = op->width, .height = op->height};
4494 char name[MAX_FONT_NAME];
4501 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
4504 name[MAX_FONT_NAME - 1] = 0;
4507 if (vc->vc_mode != KD_TEXT) {
4511 if (vc->vc_sw->con_font_default)
4512 rc = vc->vc_sw->con_font_default(vc, &font, s);
4517 op->width = font.width;
4518 op->height = font.height;
4523 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
4525 int con = op->height;
4530 if (vc->vc_mode != KD_TEXT)
4532 else if (!vc->vc_sw->con_font_copy)
4534 else if (con < 0 || !vc_cons_allocated(con))
4536 else if (con == vc->vc_num) /* nothing to do */
4539 rc = vc->vc_sw->con_font_copy(vc, con);
4544 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4547 case KD_FONT_OP_SET:
4548 return con_font_set(vc, op);
4549 case KD_FONT_OP_GET:
4550 return con_font_get(vc, op);
4551 case KD_FONT_OP_SET_DEFAULT:
4552 return con_font_default(vc, op);
4553 case KD_FONT_OP_COPY:
4554 return con_font_copy(vc, op);
4560 * Interface exported to selection and vcs.
4563 /* used by selection */
4564 u16 screen_glyph(struct vc_data *vc, int offset)
4566 u16 w = scr_readw(screenpos(vc, offset, 1));
4569 if (w & vc->vc_hi_font_mask)
4573 EXPORT_SYMBOL_GPL(screen_glyph);
4575 u32 screen_glyph_unicode(struct vc_data *vc, int n)
4577 struct uni_screen *uniscr = get_vc_uniscr(vc);
4580 return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols];
4581 return inverse_translate(vc, screen_glyph(vc, n * 2), 1);
4583 EXPORT_SYMBOL_GPL(screen_glyph_unicode);
4585 /* used by vcs - note the word offset */
4586 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4588 return screenpos(vc, 2 * w_offset, viewed);
4590 EXPORT_SYMBOL_GPL(screen_pos);
4592 void getconsxy(struct vc_data *vc, unsigned char *p)
4598 void putconsxy(struct vc_data *vc, unsigned char *p)
4601 gotoxy(vc, p[0], p[1]);
4605 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4607 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4608 return softcursor_original;
4609 return scr_readw(org);
4612 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4614 scr_writew(val, org);
4615 if ((unsigned long)org == vc->vc_pos) {
4616 softcursor_original = -1;
4621 void vcs_scr_updated(struct vc_data *vc)
4626 void vc_scrolldelta_helper(struct vc_data *c, int lines,
4627 unsigned int rolled_over, void *base, unsigned int size)
4629 unsigned long ubase = (unsigned long)base;
4630 ptrdiff_t scr_end = (void *)c->vc_scr_end - base;
4631 ptrdiff_t vorigin = (void *)c->vc_visible_origin - base;
4632 ptrdiff_t origin = (void *)c->vc_origin - base;
4633 int margin = c->vc_size_row * 4;
4634 int from, wrap, from_off, avail;
4636 /* Turn scrollback off */
4638 c->vc_visible_origin = c->vc_origin;
4642 /* Do we have already enough to allow jumping from 0 to the end? */
4643 if (rolled_over > scr_end + margin) {
4645 wrap = rolled_over + c->vc_size_row;
4651 from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row;
4652 avail = (origin - from + wrap) % wrap;
4654 /* Only a little piece would be left? Show all incl. the piece! */
4655 if (avail < 2 * margin)
4657 if (from_off < margin)
4659 if (from_off > avail - margin)
4662 c->vc_visible_origin = ubase + (from + from_off) % wrap;
4664 EXPORT_SYMBOL_GPL(vc_scrolldelta_helper);
4667 * Visible symbols for modules
4670 EXPORT_SYMBOL(color_table);
4671 EXPORT_SYMBOL(default_red);
4672 EXPORT_SYMBOL(default_grn);
4673 EXPORT_SYMBOL(default_blu);
4674 EXPORT_SYMBOL(update_region);
4675 EXPORT_SYMBOL(redraw_screen);
4676 EXPORT_SYMBOL(vc_resize);
4677 EXPORT_SYMBOL(fg_console);
4678 EXPORT_SYMBOL(console_blank_hook);
4679 EXPORT_SYMBOL(console_blanked);
4680 EXPORT_SYMBOL(vc_cons);
4681 EXPORT_SYMBOL(global_cursor_default);
4682 #ifndef VT_SINGLE_DRIVER
4683 EXPORT_SYMBOL(give_up_console);