2 * linux/drivers/char/vt.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * Hopefully this will be a rather complete VT102 implementation.
10 * Beeping thanks to John T Kohl.
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
38 * Original m68k console driver modifications by
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
43 * Note that the abstract console driver allows all consoles to be of
44 * potentially different sizes, so the following variables depend on the
45 * current console (currcons):
52 * The abstract console driver provides a generic interface for a text
53 * console. It supports VGA text mode, frame buffer based graphical consoles
54 * and special graphics processors that are only accessible through some
55 * registers (e.g. a TMS340x0 GSP).
57 * The interface to the hardware is specified using a special structure
58 * (struct consw) which contains function pointers to console operations
59 * (see <linux/console.h> for more information).
61 * Support for changeable cursor shape
62 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
64 * Ported to i386 and con_scrolldelta fixed
65 * by Emmanuel Marty <core@ggi-project.org>, April 1998
67 * Resurrected character buffers in videoram plus lots of other trickery
68 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
70 * Removed old-style timers, introduced console_timer, made timer
71 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
73 * Removed console_lock, enabled interrupts across all console operations
74 * 13 March 2001, Andrew Morton
77 #include <linux/module.h>
78 #include <linux/types.h>
79 #include <linux/sched.h>
80 #include <linux/tty.h>
81 #include <linux/tty_flip.h>
82 #include <linux/kernel.h>
83 #include <linux/string.h>
84 #include <linux/errno.h>
86 #include <linux/slab.h>
87 #include <linux/major.h>
89 #include <linux/console.h>
90 #include <linux/init.h>
91 #include <linux/devfs_fs_kernel.h>
92 #include <linux/vt_kern.h>
93 #include <linux/selection.h>
94 #include <linux/tiocl.h>
95 #include <linux/kbd_kern.h>
96 #include <linux/consolemap.h>
97 #include <linux/timer.h>
98 #include <linux/interrupt.h>
99 #include <linux/config.h>
100 #include <linux/workqueue.h>
101 #include <linux/bootmem.h>
102 #include <linux/pm.h>
103 #include <linux/font.h>
106 #include <asm/system.h>
107 #include <asm/uaccess.h>
108 #include <asm/bitops.h>
110 #include "console_macros.h"
113 const struct consw *conswitchp;
115 /* A bitmap for codes <32. A bit of 1 indicates that the code
116 * corresponding to that bit number invokes some special action
117 * (such as cursor movement) and should not be displayed as a
118 * glyph unless the disp_ctrl mode is explicitly enabled.
120 #define CTRL_ACTION 0x0d00ff81
121 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
124 * Here is the default bell parameters: 750HZ, 1/8th of a second
126 #define DEFAULT_BELL_PITCH 750
127 #define DEFAULT_BELL_DURATION (HZ/8)
129 extern void vcs_make_devfs(struct tty_struct *tty);
130 extern void vcs_remove_devfs(struct tty_struct *tty);
132 extern void console_map_init(void);
133 #ifdef CONFIG_PROM_CONSOLE
134 extern void prom_con_init(void);
136 #ifdef CONFIG_MDA_CONSOLE
137 extern int mda_console_init(void);
139 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
140 extern int fb_console_init(void);
143 struct vc vc_cons [MAX_NR_CONSOLES];
145 #ifndef VT_SINGLE_DRIVER
146 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
149 static int con_open(struct tty_struct *, struct file *);
150 static void vc_init(unsigned int console, unsigned int rows,
151 unsigned int cols, int do_clear);
152 static void gotoxy(int currcons, int new_x, int new_y);
153 static void save_cur(int currcons);
154 static void reset_terminal(int currcons, int do_clear);
155 static void con_flush_chars(struct tty_struct *tty);
156 static void set_vesa_blanking(char __user *p);
157 static void set_cursor(int currcons);
158 static void hide_cursor(int currcons);
159 static void console_callback(void *ignored);
160 static void blank_screen_t(unsigned long dummy);
162 static int printable; /* Is console ready for printing? */
165 * ignore_poke: don't unblank the screen when things are typed. This is
166 * mainly for the privacy of braille terminal users.
168 static int ignore_poke;
170 int do_poke_blanked_console;
173 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
174 static int blankinterval = 10*60*HZ;
175 static int vesa_off_interval;
177 static DECLARE_WORK(console_work, console_callback, NULL);
180 * fg_console is the current virtual console,
181 * last_console is the last used one,
182 * want_console is the console we want to switch to,
183 * kmsg_redirect is the console for kernel messages,
187 int want_console = -1;
191 * For each existing display, we have a pointer to console currently visible
192 * on that display, allowing consoles other than fg_console to be refreshed
193 * appropriately. Unless the low-level driver supplies its own display_fg
194 * variable, we use this one for the "master display".
196 static struct vc_data *master_display_fg;
199 * Unfortunately, we need to delay tty echo when we're currently writing to the
200 * console since the code is (and always was) not re-entrant, so we schedule
201 * all flip requests to process context with schedule-task() and run it from
202 * console_callback().
206 * For the same reason, we defer scrollback to the console callback.
208 static int scrollback_delta;
211 * Hook so that the power management routines can (un)blank
212 * the console on our behalf.
214 int (*console_blank_hook)(int);
216 static struct timer_list console_timer;
217 static int blank_state;
218 static int blank_timer_expired;
226 * Low-Level Functions
229 #define IS_FG (currcons == fg_console)
230 #define IS_VISIBLE CON_IS_VISIBLE(vc_cons[currcons].d)
232 #ifdef VT_BUF_VRAM_ONLY
235 #define DO_UPDATE IS_VISIBLE
238 static int pm_con_request(struct pm_dev *dev, pm_request_t rqst, void *data);
239 static struct pm_dev *pm_con;
241 static inline unsigned short *screenpos(int currcons, int offset, int viewed)
246 p = (unsigned short *)(origin + offset);
247 else if (!sw->con_screen_pos)
248 p = (unsigned short *)(visible_origin + offset);
250 p = sw->con_screen_pos(vc_cons[currcons].d, offset);
254 static inline void scrolldelta(int lines)
256 scrollback_delta += lines;
257 schedule_console_callback();
260 void schedule_console_callback(void)
262 schedule_work(&console_work);
265 static void scrup(int currcons, unsigned int t, unsigned int b, int nr)
267 unsigned short *d, *s;
271 if (b > video_num_lines || t >= b || nr < 1)
273 if (IS_VISIBLE && sw->con_scroll(vc_cons[currcons].d, t, b, SM_UP, nr))
275 d = (unsigned short *) (origin+video_size_row*t);
276 s = (unsigned short *) (origin+video_size_row*(t+nr));
277 scr_memmovew(d, s, (b-t-nr) * video_size_row);
278 scr_memsetw(d + (b-t-nr) * video_num_columns, video_erase_char, video_size_row*nr);
282 scrdown(int currcons, unsigned int t, unsigned int b, int nr)
289 if (b > video_num_lines || t >= b || nr < 1)
291 if (IS_VISIBLE && sw->con_scroll(vc_cons[currcons].d, t, b, SM_DOWN, nr))
293 s = (unsigned short *) (origin+video_size_row*t);
294 step = video_num_columns * nr;
295 scr_memmovew(s + step, s, (b-t-nr)*video_size_row);
296 scr_memsetw(s, video_erase_char, 2*step);
299 static void do_update_region(int currcons, unsigned long start, int count)
301 #ifndef VT_BUF_VRAM_ONLY
302 unsigned int xx, yy, offset;
306 if (!sw->con_getxy) {
307 offset = (start - origin) / 2;
308 xx = offset % video_num_columns;
309 yy = offset / video_num_columns;
312 start = sw->con_getxy(vc_cons[currcons].d, start, &nxx, &nyy);
316 u16 attrib = scr_readw(p) & 0xff00;
319 while (xx < video_num_columns && count) {
320 if (attrib != (scr_readw(p) & 0xff00)) {
322 sw->con_putcs(vc_cons[currcons].d, q, p-q, yy, startx);
325 attrib = scr_readw(p) & 0xff00;
332 sw->con_putcs(vc_cons[currcons].d, q, p-q, yy, startx);
339 start = sw->con_getxy(vc_cons[currcons].d, start, NULL, NULL);
345 void update_region(int currcons, unsigned long start, int count)
347 WARN_CONSOLE_UNLOCKED();
350 hide_cursor(currcons);
351 do_update_region(currcons, start, count);
352 set_cursor(currcons);
356 /* Structure of attributes is hardware-dependent */
358 static u8 build_attr(int currcons, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
360 if (sw->con_build_attr)
361 return sw->con_build_attr(vc_cons[currcons].d, _color, _intensity, _blink, _underline, _reverse);
363 #ifndef VT_BUF_VRAM_ONLY
365 * ++roman: I completely changed the attribute format for monochrome
366 * mode (!can_do_color). The formerly used MDA (monochrome display
367 * adapter) format didn't allow the combination of certain effects.
368 * Now the attribute is just a bit vector:
369 * Bit 0..1: intensity (0..2)
378 (_underline ? 4 : 0) |
382 a = (a & 0xf0) | ulcolor;
383 else if (_intensity == 0)
384 a = (a & 0xf0) | halfcolor;
386 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
391 if (hi_font_mask == 0x100)
400 static void update_attr(int currcons)
402 attr = build_attr(currcons, color, intensity, blink, underline, reverse ^ decscnm);
403 video_erase_char = (build_attr(currcons, color, 1, blink, 0, decscnm) << 8) | ' ';
406 /* Note: inverting the screen twice should revert to the original state */
408 void invert_screen(int currcons, int offset, int count, int viewed)
412 WARN_CONSOLE_UNLOCKED();
415 p = screenpos(currcons, offset, viewed);
416 if (sw->con_invert_region)
417 sw->con_invert_region(vc_cons[currcons].d, p, count);
418 #ifndef VT_BUF_VRAM_ONLY
431 } else if (hi_font_mask == 0x100) {
434 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
441 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
449 do_update_region(currcons, (unsigned long) p, count);
452 /* used by selection: complement pointer position */
453 void complement_pos(int currcons, int offset)
455 static unsigned short *p;
456 static unsigned short old;
457 static unsigned short oldx, oldy;
459 WARN_CONSOLE_UNLOCKED();
464 sw->con_putc(vc_cons[currcons].d, old, oldy, oldx);
470 p = screenpos(currcons, offset, 1);
472 new = old ^ complement_mask;
475 oldx = (offset >> 1) % video_num_columns;
476 oldy = (offset >> 1) / video_num_columns;
477 sw->con_putc(vc_cons[currcons].d, new, oldy, oldx);
482 static void insert_char(int currcons, unsigned int nr)
484 unsigned short *p, *q = (unsigned short *) pos;
486 p = q + video_num_columns - nr - x;
488 scr_writew(scr_readw(p), p + nr);
489 scr_memsetw(q, video_erase_char, nr*2);
492 unsigned short oldattr = attr;
493 sw->con_bmove(vc_cons[currcons].d,y,x,y,x+nr,1,
494 video_num_columns-x-nr);
495 attr = video_erase_char >> 8;
497 sw->con_putc(vc_cons[currcons].d,
498 video_erase_char,y,x+nr);
503 static void delete_char(int currcons, unsigned int nr)
506 unsigned short *p = (unsigned short *) pos;
508 while (++i <= video_num_columns - nr) {
509 scr_writew(scr_readw(p+nr), p);
512 scr_memsetw(p, video_erase_char, nr*2);
515 unsigned short oldattr = attr;
516 sw->con_bmove(vc_cons[currcons].d, y, x+nr, y, x, 1,
517 video_num_columns-x-nr);
518 attr = video_erase_char >> 8;
520 sw->con_putc(vc_cons[currcons].d,
522 video_num_columns-1-nr);
527 static int softcursor_original;
529 static void add_softcursor(int currcons)
531 int i = scr_readw((u16 *) pos);
532 u32 type = cursor_type;
534 if (! (type & 0x10)) return;
535 if (softcursor_original != -1) return;
536 softcursor_original = i;
537 i |= ((type >> 8) & 0xff00 );
538 i ^= ((type) & 0xff00 );
539 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
540 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
541 scr_writew(i, (u16 *) pos);
543 sw->con_putc(vc_cons[currcons].d, i, y, x);
546 static void hide_softcursor(int currcons)
548 if (softcursor_original != -1) {
549 scr_writew(softcursor_original,(u16 *) pos);
551 sw->con_putc(vc_cons[currcons].d, softcursor_original, y, x);
552 softcursor_original = -1;
556 static void hide_cursor(int currcons)
558 if (currcons == sel_cons)
560 sw->con_cursor(vc_cons[currcons].d,CM_ERASE);
561 hide_softcursor(currcons);
564 static void set_cursor(int currcons)
566 if (!IS_FG || console_blanked || vcmode == KD_GRAPHICS)
569 if (currcons == sel_cons)
571 add_softcursor(currcons);
572 if ((cursor_type & 0x0f) != 1)
573 sw->con_cursor(vc_cons[currcons].d,CM_DRAW);
575 hide_cursor(currcons);
578 static void set_origin(int currcons)
580 WARN_CONSOLE_UNLOCKED();
583 !sw->con_set_origin ||
584 !sw->con_set_origin(vc_cons[currcons].d))
585 origin = (unsigned long) screenbuf;
586 visible_origin = origin;
587 scr_end = origin + screenbuf_size;
588 pos = origin + video_size_row*y + 2*x;
591 static inline void save_screen(int currcons)
593 WARN_CONSOLE_UNLOCKED();
595 if (sw->con_save_screen)
596 sw->con_save_screen(vc_cons[currcons].d);
600 * Redrawing of screen
603 void redraw_screen(int new_console, int is_switch)
606 int currcons, old_console;
608 WARN_CONSOLE_UNLOCKED();
610 if (!vc_cons_allocated(new_console)) {
612 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
617 currcons = fg_console;
618 hide_cursor(currcons);
619 if (fg_console != new_console) {
620 struct vc_data **display = vc_cons[new_console].d->vc_display_fg;
621 old_console = (*display) ? (*display)->vc_num : fg_console;
622 *display = vc_cons[new_console].d;
623 fg_console = new_console;
624 currcons = old_console;
626 save_screen(currcons);
627 set_origin(currcons);
629 currcons = new_console;
630 if (old_console == new_console)
634 currcons = new_console;
635 hide_cursor(currcons);
640 set_origin(currcons);
641 update = sw->con_switch(vc_cons[currcons].d);
642 set_palette(currcons);
643 if (update && vcmode != KD_GRAPHICS)
644 do_update_region(currcons, origin, screenbuf_size/2);
646 set_cursor(currcons);
649 compute_shiftstate();
654 * Allocation, freeing and resizing of VTs.
657 int vc_cons_allocated(unsigned int i)
659 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
662 static void visual_init(int currcons, int init)
664 /* ++Geert: sw->con_init determines console size */
666 module_put(sw->owner);
668 #ifndef VT_SINGLE_DRIVER
669 if (con_driver_map[currcons])
670 sw = con_driver_map[currcons];
672 __module_get(sw->owner);
674 display_fg = &master_display_fg;
675 vc_cons[currcons].d->vc_uni_pagedir_loc = &vc_cons[currcons].d->vc_uni_pagedir;
676 vc_cons[currcons].d->vc_uni_pagedir = 0;
680 sw->con_init(vc_cons[currcons].d, init);
681 if (!complement_mask)
682 complement_mask = can_do_color ? 0x7700 : 0x0800;
683 s_complement_mask = complement_mask;
684 video_size_row = video_num_columns<<1;
685 screenbuf_size = video_num_lines*video_size_row;
688 int vc_allocate(unsigned int currcons) /* return 0 on success */
690 WARN_CONSOLE_UNLOCKED();
692 if (currcons >= MAX_NR_CONSOLES)
694 if (!vc_cons[currcons].d) {
697 /* prevent users from taking too much memory */
698 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
701 /* due to the granularity of kmalloc, we waste some memory here */
702 /* the alloc is done in two steps, to optimize the common situation
703 of a 25x80 console (structsize=216, screenbuf_size=4000) */
704 /* although the numbers above are not valid since long ago, the
705 point is still up-to-date and the comment still has its value
706 even if only as a historical artifact. --mj, July 1998 */
707 p = (long) kmalloc(structsize, GFP_KERNEL);
710 memset((void *)p, 0, structsize);
711 vc_cons[currcons].d = (struct vc_data *)p;
712 vt_cons[currcons] = (struct vt_struct *)(p+sizeof(struct vc_data));
713 visual_init(currcons, 1);
714 if (!*vc_cons[currcons].d->vc_uni_pagedir_loc)
715 con_set_default_unimap(currcons);
716 q = (long)kmalloc(screenbuf_size, GFP_KERNEL);
719 vc_cons[currcons].d = NULL;
720 vt_cons[currcons] = NULL;
723 screenbuf = (unsigned short *) q;
725 vc_init(currcons, video_num_lines, video_num_columns, 1);
728 pm_con = pm_register(PM_SYS_DEV,
736 inline int resize_screen(int currcons, int width, int height)
738 /* Resizes the resolution of the display adapater */
741 if (vcmode != KD_GRAPHICS && sw->con_resize)
742 err = sw->con_resize(vc_cons[currcons].d, width, height);
747 * Change # of rows and columns (0 means unchanged/the size of fg_console)
748 * [this is to be used together with some user program
749 * like resize that changes the hardware videomode]
751 int vc_resize(int currcons, unsigned int cols, unsigned int lines)
753 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
754 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
755 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
756 unsigned short *newscreen;
758 WARN_CONSOLE_UNLOCKED();
760 if (!vc_cons_allocated(currcons))
763 new_cols = (cols ? cols : video_num_columns);
764 new_rows = (lines ? lines : video_num_lines);
765 new_row_size = new_cols << 1;
766 new_screen_size = new_row_size * new_rows;
768 if (new_cols == video_num_columns && new_rows == video_num_lines)
771 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
775 old_rows = video_num_lines;
776 old_cols = video_num_columns;
777 old_row_size = video_size_row;
778 old_screen_size = screenbuf_size;
780 err = resize_screen(currcons, new_cols, new_rows);
786 video_num_lines = new_rows;
787 video_num_columns = new_cols;
788 video_size_row = new_row_size;
789 screenbuf_size = new_screen_size;
791 rlth = min(old_row_size, new_row_size);
792 rrem = new_row_size - rlth;
794 new_origin = (long) newscreen;
795 new_scr_end = new_origin + new_screen_size;
796 if (new_rows < old_rows)
797 old_origin += (old_rows - new_rows) * old_row_size;
799 update_attr(currcons);
801 while (old_origin < scr_end) {
802 scr_memcpyw((unsigned short *) new_origin, (unsigned short *) old_origin, rlth);
804 scr_memsetw((void *)(new_origin + rlth), video_erase_char, rrem);
805 old_origin += old_row_size;
806 new_origin += new_row_size;
808 if (new_scr_end > new_origin)
809 scr_memsetw((void *) new_origin, video_erase_char, new_scr_end - new_origin);
812 screenbuf = newscreen;
814 screenbuf_size = new_screen_size;
815 set_origin(currcons);
817 /* do part of a reset_terminal() */
819 bottom = video_num_lines;
820 gotoxy(currcons, x, y);
823 if (vc_cons[currcons].d->vc_tty) {
824 struct winsize ws, *cws = &vc_cons[currcons].d->vc_tty->winsize;
826 memset(&ws, 0, sizeof(ws));
827 ws.ws_row = video_num_lines;
828 ws.ws_col = video_num_columns;
829 ws.ws_ypixel = video_scan_lines;
830 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
831 vc_cons[currcons].d->vc_tty->pgrp > 0)
832 kill_pg(vc_cons[currcons].d->vc_tty->pgrp, SIGWINCH, 1);
837 update_screen(currcons);
842 void vc_disallocate(unsigned int currcons)
844 WARN_CONSOLE_UNLOCKED();
846 if (vc_cons_allocated(currcons)) {
847 sw->con_deinit(vc_cons[currcons].d);
850 if (currcons >= MIN_NR_CONSOLES)
851 kfree(vc_cons[currcons].d);
852 vc_cons[currcons].d = NULL;
860 #define set_kbd(x) set_vc_kbd_mode(kbd_table+currcons,x)
861 #define clr_kbd(x) clr_vc_kbd_mode(kbd_table+currcons,x)
862 #define is_kbd(x) vc_kbd_mode(kbd_table+currcons,x)
864 #define decarm VC_REPEAT
865 #define decckm VC_CKMODE
866 #define kbdapplic VC_APPLIC
870 * this is what the terminal answers to a ESC-Z or csi0c query.
872 #define VT100ID "\033[?1;2c"
873 #define VT102ID "\033[?6c"
875 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
876 8,12,10,14, 9,13,11,15 };
878 /* the default colour table, for VGA+ colour systems */
879 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
880 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
881 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
882 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
883 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
884 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
887 * gotoxy() must verify all boundaries, because the arguments
888 * might also be negative. If the given position is out of
889 * bounds, the cursor is placed at the nearest margin.
891 static void gotoxy(int currcons, int new_x, int new_y)
898 if (new_x >= video_num_columns)
899 x = video_num_columns - 1;
907 max_y = video_num_lines;
911 else if (new_y >= max_y)
915 pos = origin + y*video_size_row + (x<<1);
919 /* for absolute user moves, when decom is set */
920 static void gotoxay(int currcons, int new_x, int new_y)
922 gotoxy(currcons, new_x, decom ? (top+new_y) : new_y);
925 void scrollback(int lines)
927 int currcons = fg_console;
930 lines = video_num_lines/2;
934 void scrollfront(int lines)
936 int currcons = fg_console;
939 lines = video_num_lines/2;
943 static void lf(int currcons)
945 /* don't scroll if above bottom of scrolling region, or
946 * if below scrolling region
949 scrup(currcons,top,bottom,1);
950 else if (y < video_num_lines-1) {
952 pos += video_size_row;
957 static void ri(int currcons)
959 /* don't scroll if below top of scrolling region, or
960 * if above scrolling region
963 scrdown(currcons,top,bottom,1);
966 pos -= video_size_row;
971 static inline void cr(int currcons)
977 static inline void bs(int currcons)
986 static inline void del(int currcons)
991 static void csi_J(int currcons, int vpar)
994 unsigned short * start;
997 case 0: /* erase from cursor to end of display */
998 count = (scr_end-pos)>>1;
999 start = (unsigned short *) pos;
1001 /* do in two stages */
1002 sw->con_clear(vc_cons[currcons].d, y, x, 1,
1003 video_num_columns-x);
1004 sw->con_clear(vc_cons[currcons].d, y+1, 0,
1005 video_num_lines-y-1,
1009 case 1: /* erase from start to cursor */
1010 count = ((pos-origin)>>1)+1;
1011 start = (unsigned short *) origin;
1013 /* do in two stages */
1014 sw->con_clear(vc_cons[currcons].d, 0, 0, y,
1016 sw->con_clear(vc_cons[currcons].d, y, 0, 1,
1020 case 2: /* erase whole display */
1021 count = video_num_columns * video_num_lines;
1022 start = (unsigned short *) origin;
1024 sw->con_clear(vc_cons[currcons].d, 0, 0,
1031 scr_memsetw(start, video_erase_char, 2*count);
1035 static void csi_K(int currcons, int vpar)
1038 unsigned short * start;
1041 case 0: /* erase from cursor to end of line */
1042 count = video_num_columns-x;
1043 start = (unsigned short *) pos;
1045 sw->con_clear(vc_cons[currcons].d, y, x, 1,
1046 video_num_columns-x);
1048 case 1: /* erase from start of line to cursor */
1049 start = (unsigned short *) (pos - (x<<1));
1052 sw->con_clear(vc_cons[currcons].d, y, 0, 1,
1055 case 2: /* erase whole line */
1056 start = (unsigned short *) (pos - (x<<1));
1057 count = video_num_columns;
1059 sw->con_clear(vc_cons[currcons].d, y, 0, 1,
1065 scr_memsetw(start, video_erase_char, 2 * count);
1069 static void csi_X(int currcons, int vpar) /* erase the following vpar positions */
1075 count = (vpar > video_num_columns-x) ? (video_num_columns-x) : vpar;
1077 scr_memsetw((unsigned short *) pos, video_erase_char, 2 * count);
1079 sw->con_clear(vc_cons[currcons].d, y, x, 1, count);
1083 static void default_attr(int currcons)
1092 /* console_sem is held */
1093 static void csi_m(int currcons)
1097 for (i=0;i<=npar;i++)
1099 case 0: /* all attributes off */
1100 default_attr(currcons);
1117 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1118 * Select primary font, don't display
1119 * control chars if defined, don't set
1122 translate = set_translate(charset == 0
1124 : G1_charset,currcons);
1128 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1129 * Select first alternate font, lets
1130 * chars < 32 be displayed as ROM chars.
1132 translate = set_translate(IBMPC_MAP,currcons);
1136 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1137 * Select second alternate font, toggle
1138 * high bit before displaying as ROM char.
1140 translate = set_translate(IBMPC_MAP,currcons);
1157 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1158 * Enables underscore, white foreground
1159 * with white underscore (Linux - use
1160 * default foreground).
1162 color = (def_color & 0x0f) | background;
1165 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1166 * Disable underline option.
1167 * Reset colour to default? It did this
1170 color = (def_color & 0x0f) | background;
1174 color = (def_color & 0xf0) | foreground;
1177 if (par[i] >= 30 && par[i] <= 37)
1178 color = color_table[par[i]-30]
1180 else if (par[i] >= 40 && par[i] <= 47)
1181 color = (color_table[par[i]-40]<<4)
1185 update_attr(currcons);
1188 static void respond_string(const char *p, struct tty_struct *tty)
1191 tty_insert_flip_char(tty, *p, 0);
1194 con_schedule_flip(tty);
1197 static void cursor_report(int currcons, struct tty_struct *tty)
1201 sprintf(buf, "\033[%d;%dR", y + (decom ? top+1 : 1), x+1);
1202 respond_string(buf, tty);
1205 static inline void status_report(struct tty_struct *tty)
1207 respond_string("\033[0n", tty); /* Terminal ok */
1210 static inline void respond_ID(struct tty_struct * tty)
1212 respond_string(VT102ID, tty);
1215 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1219 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1221 respond_string(buf, tty);
1224 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1225 int mouse_reporting(void)
1227 int currcons = fg_console;
1229 return report_mouse;
1232 /* console_sem is held */
1233 static void set_mode(int currcons, int on_off)
1237 for (i=0; i<=npar; i++)
1238 if (ques) switch(par[i]) { /* DEC private modes set/reset */
1239 case 1: /* Cursor keys send ^[Ox/^[[x */
1245 case 3: /* 80/132 mode switch unimplemented */
1248 (void) vc_resize(deccolm ? 132 : 80, video_num_lines);
1249 /* this alone does not suffice; some user mode
1250 utility has to change the hardware regs */
1253 case 5: /* Inverted screen on/off */
1254 if (decscnm != on_off) {
1256 invert_screen(currcons, 0, screenbuf_size, 0);
1257 update_attr(currcons);
1260 case 6: /* Origin relative/absolute */
1262 gotoxay(currcons,0,0);
1264 case 7: /* Autowrap on/off */
1267 case 8: /* Autorepeat on/off */
1274 report_mouse = on_off ? 1 : 0;
1276 case 25: /* Cursor on/off */
1280 report_mouse = on_off ? 2 : 0;
1282 } else switch(par[i]) { /* ANSI modes set/reset */
1283 case 3: /* Monitor (display ctrls) */
1286 case 4: /* Insert Mode on/off */
1289 case 20: /* Lf, Enter == CrLf/Lf */
1298 /* console_sem is held */
1299 static void setterm_command(int currcons)
1302 case 1: /* set color for underline mode */
1303 if (can_do_color && par[1] < 16) {
1304 ulcolor = color_table[par[1]];
1306 update_attr(currcons);
1309 case 2: /* set color for half intensity mode */
1310 if (can_do_color && par[1] < 16) {
1311 halfcolor = color_table[par[1]];
1313 update_attr(currcons);
1316 case 8: /* store colors as defaults */
1318 if (hi_font_mask == 0x100)
1320 default_attr(currcons);
1321 update_attr(currcons);
1323 case 9: /* set blanking interval */
1324 blankinterval = ((par[1] < 60) ? par[1] : 60) * 60 * HZ;
1325 poke_blanked_console();
1327 case 10: /* set bell frequency in Hz */
1329 bell_pitch = par[1];
1331 bell_pitch = DEFAULT_BELL_PITCH;
1333 case 11: /* set bell duration in msec */
1335 bell_duration = (par[1] < 2000) ?
1338 bell_duration = DEFAULT_BELL_DURATION;
1340 case 12: /* bring specified console to the front */
1341 if (par[1] >= 1 && vc_cons_allocated(par[1]-1))
1342 set_console(par[1] - 1);
1344 case 13: /* unblank the screen */
1345 poke_blanked_console();
1347 case 14: /* set vesa powerdown interval */
1348 vesa_off_interval = ((par[1] < 60) ? par[1] : 60) * 60 * HZ;
1350 case 15: /* activate the previous console */
1351 set_console(last_console);
1356 /* console_sem is held */
1357 static void csi_at(int currcons, unsigned int nr)
1359 if (nr > video_num_columns - x)
1360 nr = video_num_columns - x;
1363 insert_char(currcons, nr);
1366 /* console_sem is held */
1367 static void csi_L(int currcons, unsigned int nr)
1369 if (nr > video_num_lines - y)
1370 nr = video_num_lines - y;
1373 scrdown(currcons,y,bottom,nr);
1377 /* console_sem is held */
1378 static void csi_P(int currcons, unsigned int nr)
1380 if (nr > video_num_columns - x)
1381 nr = video_num_columns - x;
1384 delete_char(currcons, nr);
1387 /* console_sem is held */
1388 static void csi_M(int currcons, unsigned int nr)
1390 if (nr > video_num_lines - y)
1391 nr = video_num_lines - y;
1394 scrup(currcons,y,bottom,nr);
1398 /* console_sem is held (except via vc_init->reset_terminal */
1399 static void save_cur(int currcons)
1403 s_intensity = intensity;
1404 s_underline = underline;
1406 s_reverse = reverse;
1407 s_charset = charset;
1409 saved_G0 = G0_charset;
1410 saved_G1 = G1_charset;
1413 /* console_sem is held */
1414 static void restore_cur(int currcons)
1416 gotoxy(currcons,saved_x,saved_y);
1417 intensity = s_intensity;
1418 underline = s_underline;
1420 reverse = s_reverse;
1421 charset = s_charset;
1423 G0_charset = saved_G0;
1424 G1_charset = saved_G1;
1425 translate = set_translate(charset ? G1_charset : G0_charset,currcons);
1426 update_attr(currcons);
1430 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1431 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1434 /* console_sem is held (except via vc_init()) */
1435 static void reset_terminal(int currcons, int do_clear)
1438 bottom = video_num_lines;
1439 vc_state = ESnormal;
1441 translate = set_translate(LAT1_MAP,currcons);
1442 G0_charset = LAT1_MAP;
1443 G1_charset = GRAF_MAP;
1463 kbd_table[currcons].lockstate = 0;
1464 kbd_table[currcons].slockstate = 0;
1465 kbd_table[currcons].ledmode = LED_SHOW_FLAGS;
1466 kbd_table[currcons].ledflagstate = kbd_table[currcons].default_ledflagstate;
1467 /* do not do set_leds here because this causes an endless tasklet loop
1468 when the keyboard hasn't been initialized yet */
1470 cursor_type = CUR_DEFAULT;
1471 complement_mask = s_complement_mask;
1473 default_attr(currcons);
1474 update_attr(currcons);
1476 tab_stop[0] = 0x01010100;
1480 tab_stop[4] = 0x01010101;
1482 bell_pitch = DEFAULT_BELL_PITCH;
1483 bell_duration = DEFAULT_BELL_DURATION;
1485 gotoxy(currcons,0,0);
1491 /* console_sem is held */
1492 static void do_con_trol(struct tty_struct *tty, unsigned int currcons, int c)
1495 * Control characters can be used in the _middle_
1496 * of an escape sequence.
1503 kd_mksound(bell_pitch, bell_duration);
1510 while (x < video_num_columns - 1) {
1512 if (tab_stop[x >> 5] & (1 << (x & 31)))
1517 case 10: case 11: case 12:
1526 translate = set_translate(G1_charset,currcons);
1531 translate = set_translate(G0_charset,currcons);
1535 vc_state = ESnormal;
1544 vc_state = ESsquare;
1549 vc_state = ESnormal;
1552 vc_state = ESsquare;
1555 vc_state = ESnonstd;
1558 vc_state = ESpercent;
1571 tab_stop[x >> 5] |= (1 << (x & 31));
1580 restore_cur(currcons);
1592 reset_terminal(currcons,1);
1594 case '>': /* Numeric keypad */
1597 case '=': /* Appl. keypad */
1603 if (c=='P') { /* palette escape sequence */
1604 for (npar=0; npar<NPAR; npar++)
1607 vc_state = ESpalette;
1609 } else if (c=='R') { /* reset palette */
1610 reset_palette(currcons);
1611 vc_state = ESnormal;
1613 vc_state = ESnormal;
1616 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1617 par[npar++] = (c>'9' ? (c&0xDF)-'A'+10 : c-'0') ;
1619 int i = par[0]*3, j = 1;
1620 palette[i] = 16*par[j++];
1621 palette[i++] += par[j++];
1622 palette[i] = 16*par[j++];
1623 palette[i++] += par[j++];
1624 palette[i] = 16*par[j++];
1625 palette[i] += par[j];
1626 set_palette(currcons);
1627 vc_state = ESnormal;
1630 vc_state = ESnormal;
1633 for(npar = 0 ; npar < NPAR ; npar++)
1636 vc_state = ESgetpars;
1637 if (c == '[') { /* Function key */
1645 if (c==';' && npar<NPAR-1) {
1648 } else if (c>='0' && c<='9') {
1652 } else vc_state=ESgotpars;
1654 vc_state = ESnormal;
1657 set_mode(currcons,1);
1660 set_mode(currcons,0);
1665 cursor_type = par[0] | (par[1]<<8) | (par[2]<<16);
1667 cursor_type = CUR_DEFAULT;
1675 complement_mask = par[0]<<8 | par[1];
1677 complement_mask = s_complement_mask;
1685 else if (par[0] == 6)
1686 cursor_report(currcons,tty);
1696 if (par[0]) par[0]--;
1697 gotoxy(currcons,par[0],y);
1700 if (!par[0]) par[0]++;
1701 gotoxy(currcons,x,y-par[0]);
1704 if (!par[0]) par[0]++;
1705 gotoxy(currcons,x,y+par[0]);
1708 if (!par[0]) par[0]++;
1709 gotoxy(currcons,x+par[0],y);
1712 if (!par[0]) par[0]++;
1713 gotoxy(currcons,x-par[0],y);
1716 if (!par[0]) par[0]++;
1717 gotoxy(currcons,0,y+par[0]);
1720 if (!par[0]) par[0]++;
1721 gotoxy(currcons,0,y-par[0]);
1724 if (par[0]) par[0]--;
1725 gotoxay(currcons,x,par[0]);
1728 if (par[0]) par[0]--;
1729 if (par[1]) par[1]--;
1730 gotoxay(currcons,par[1],par[0]);
1733 csi_J(currcons,par[0]);
1736 csi_K(currcons,par[0]);
1739 csi_L(currcons,par[0]);
1742 csi_M(currcons,par[0]);
1745 csi_P(currcons,par[0]);
1753 tab_stop[x >> 5] &= ~(1 << (x & 31));
1754 else if (par[0] == 3) {
1765 case 'q': /* DECLL - but only 3 leds */
1766 /* map 0,1,2,3 to 0,1,2,4 */
1768 setledstate(kbd_table + currcons,
1769 (par[0] < 3) ? par[0] : 4);
1775 par[1] = video_num_lines;
1776 /* Minimum allowed region is 2 lines */
1777 if (par[0] < par[1] &&
1778 par[1] <= video_num_lines) {
1781 gotoxay(currcons,0,0);
1788 restore_cur(currcons);
1791 csi_X(currcons, par[0]);
1794 csi_at(currcons,par[0]);
1796 case ']': /* setterm functions */
1797 setterm_command(currcons);
1802 vc_state = ESnormal;
1804 case '@': /* defined in ISO 2022 */
1807 case 'G': /* prelim official escape code */
1808 case '8': /* retained for compatibility */
1814 vc_state = ESnormal;
1817 vc_state = ESnormal;
1819 /* DEC screen alignment test. kludge :-) */
1821 (video_erase_char & 0xff00) | 'E';
1824 (video_erase_char & 0xff00) | ' ';
1825 do_update_region(currcons, origin, screenbuf_size/2);
1830 G0_charset = GRAF_MAP;
1832 G0_charset = LAT1_MAP;
1834 G0_charset = IBMPC_MAP;
1836 G0_charset = USER_MAP;
1838 translate = set_translate(G0_charset,currcons);
1839 vc_state = ESnormal;
1843 G1_charset = GRAF_MAP;
1845 G1_charset = LAT1_MAP;
1847 G1_charset = IBMPC_MAP;
1849 G1_charset = USER_MAP;
1851 translate = set_translate(G1_charset,currcons);
1852 vc_state = ESnormal;
1855 vc_state = ESnormal;
1859 /* This is a temporary buffer used to prepare a tty console write
1860 * so that we can easily avoid touching user space while holding the
1861 * console spinlock. It is allocated in con_init and is shared by
1862 * this code and the vc_screen read/write tty calls.
1864 * We have to allocate this statically in the kernel data section
1865 * since console_init (and thus con_init) are called before any
1866 * kernel memory allocation is available.
1868 char con_buf[PAGE_SIZE];
1869 DECLARE_MUTEX(con_buf_sem);
1871 /* acquires console_sem */
1872 static int do_con_write(struct tty_struct *tty, int from_user,
1873 const unsigned char *buf, int count)
1875 #ifdef VT_BUF_VRAM_ONLY
1876 #define FLUSH do { } while(0);
1878 #define FLUSH if (draw_x >= 0) { \
1879 sw->con_putcs(vc_cons[currcons].d, (u16 *)draw_from, (u16 *)draw_to-(u16 *)draw_from, y, draw_x); \
1884 int c, tc, ok, n = 0, draw_x = -1;
1885 unsigned int currcons;
1886 unsigned long draw_from = 0, draw_to = 0;
1887 struct vt_struct *vt;
1888 u16 himask, charmask;
1889 const unsigned char *orig_buf = NULL;
1897 acquire_console_sem();
1898 vt = tty->driver_data;
1900 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1901 release_console_sem();
1905 currcons = vt->vc_num;
1906 if (!vc_cons_allocated(currcons)) {
1907 /* could this happen? */
1908 static int error = 0;
1911 printk("con_write: tty %d not allocated\n", currcons+1);
1913 release_console_sem();
1916 release_console_sem();
1926 if (count > CON_BUF_SIZE)
1927 count = CON_BUF_SIZE;
1928 console_conditional_schedule();
1929 if (copy_from_user(con_buf, buf, count)) {
1930 n = 0; /* ?? are error codes legal here ?? */
1937 /* At this point 'buf' is guaranteed to be a kernel buffer
1938 * and therefore no access to userspace (and therefore sleeping)
1939 * will be needed. The con_buf_sem serializes all tty based
1940 * console rendering and vcs write/read operations. We hold
1941 * the console spinlock during the entire write.
1944 acquire_console_sem();
1946 vt = tty->driver_data;
1948 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1949 release_console_sem();
1953 himask = hi_font_mask;
1954 charmask = himask ? 0x1ff : 0xff;
1956 /* undraw cursor first */
1958 hide_cursor(currcons);
1960 while (!tty->stopped && count) {
1967 /* Combine UTF-8 into Unicode */
1968 /* Incomplete characters silently ignored */
1970 if (utf_count > 0 && (c & 0xc0) == 0x80) {
1971 utf_char = (utf_char << 6) | (c & 0x3f);
1977 if ((c & 0xe0) == 0xc0) {
1979 utf_char = (c & 0x1f);
1980 } else if ((c & 0xf0) == 0xe0) {
1982 utf_char = (c & 0x0f);
1983 } else if ((c & 0xf8) == 0xf0) {
1985 utf_char = (c & 0x07);
1986 } else if ((c & 0xfc) == 0xf8) {
1988 utf_char = (c & 0x03);
1989 } else if ((c & 0xfe) == 0xfc) {
1991 utf_char = (c & 0x01);
2000 } else { /* no utf */
2001 tc = translate[toggle_meta ? (c|0x80) : c];
2004 /* If the original code was a control character we
2005 * only allow a glyph to be displayed if the code is
2006 * not normally used (such as for cursor movement) or
2007 * if the disp_ctrl mode has been explicitly enabled.
2008 * Certain characters (as given by the CTRL_ALWAYS
2009 * bitmap) are always displayed as control characters,
2010 * as the console would be pretty useless without
2011 * them; to display an arbitrary font position use the
2012 * direct-to-font zone in UTF-8 mode.
2014 ok = tc && (c >= 32 ||
2015 (!utf && !(((disp_ctrl ? CTRL_ALWAYS
2016 : CTRL_ACTION) >> c) & 1)))
2017 && (c != 127 || disp_ctrl)
2020 if (vc_state == ESnormal && ok) {
2021 /* Now try to find out how to display it */
2022 tc = conv_uni_to_pc(vc_cons[currcons].d, tc);
2024 /* If we got -4 (not found) then see if we have
2025 defined a replacement character (U+FFFD) */
2026 tc = conv_uni_to_pc(vc_cons[currcons].d, 0xfffd);
2028 /* One reason for the -4 can be that we just
2029 did a clear_unimap();
2030 try at least to show something. */
2033 } else if ( tc == -3 ) {
2034 /* Bad hash table -- hope for the best */
2038 continue; /* Conversion failed */
2040 if (need_wrap || decim)
2047 insert_char(currcons, 1);
2049 ((attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2052 if (DO_UPDATE && draw_x < 0) {
2056 if (x == video_num_columns - 1) {
2066 do_con_trol(tty, currcons, c);
2069 console_conditional_schedule();
2070 release_console_sem();
2074 /* If the user requested something larger than
2075 * the CON_BUF_SIZE, and the tty is not stopped,
2078 if ((orig_count > CON_BUF_SIZE) && !tty->stopped) {
2079 orig_count -= CON_BUF_SIZE;
2080 orig_buf += CON_BUF_SIZE;
2094 * This is the console switching callback.
2096 * Doing console switching in a process context allows
2097 * us to do the switches asynchronously (needed when we want
2098 * to switch due to a keyboard interrupt). Synchronization
2099 * with other console code and prevention of re-entrancy is
2100 * ensured with console_sem.
2102 static void console_callback(void *ignored)
2104 acquire_console_sem();
2106 if (want_console >= 0) {
2107 if (want_console != fg_console &&
2108 vc_cons_allocated(want_console)) {
2109 hide_cursor(fg_console);
2110 change_console(want_console);
2111 /* we only changed when the console had already
2112 been allocated - a new console is not created
2113 in an interrupt routine */
2117 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2118 do_poke_blanked_console = 0;
2119 poke_blanked_console();
2121 if (scrollback_delta) {
2122 int currcons = fg_console;
2124 if (vcmode == KD_TEXT)
2125 sw->con_scrolldelta(vc_cons[currcons].d, scrollback_delta);
2126 scrollback_delta = 0;
2128 if (blank_timer_expired) {
2130 blank_timer_expired = 0;
2133 release_console_sem();
2136 void set_console(int nr)
2139 schedule_console_callback();
2142 struct tty_driver *console_driver;
2144 #ifdef CONFIG_VT_CONSOLE
2147 * Console on virtual terminal
2149 * The console must be locked when we get here.
2152 void vt_console_print(struct console *co, const char *b, unsigned count)
2154 int currcons = fg_console;
2156 static unsigned long printing;
2157 const ushort *start;
2161 /* console busy or not yet initialized */
2162 if (!printable || test_and_set_bit(0, &printing))
2167 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2168 currcons = kmsg_redirect - 1;
2170 /* read `x' only after setting currcons properly (otherwise
2171 the `x' macro will read the x of the foreground console). */
2174 if (!vc_cons_allocated(currcons)) {
2176 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2180 if (vcmode != KD_TEXT)
2183 /* undraw cursor first */
2185 hide_cursor(currcons);
2187 start = (ushort *)pos;
2189 /* Contrived structure to try to emulate original need_wrap behaviour
2190 * Problems caused when we have need_wrap set on '\n' character */
2193 if (c == 10 || c == 13 || c == 8 || need_wrap) {
2196 sw->con_putcs(vc_cons[currcons].d, start, cnt, y, x);
2202 if (c == 8) { /* backspace */
2204 start = (ushort *)pos;
2211 start = (ushort *)pos;
2213 if (c == 10 || c == 13)
2216 scr_writew((attr << 8) + c, (unsigned short *) pos);
2218 if (myx == video_num_columns - 1) {
2227 sw->con_putcs(vc_cons[currcons].d, start, cnt, y, x);
2229 if (x == video_num_columns) {
2234 set_cursor(currcons);
2236 if (!oops_in_progress)
2237 poke_blanked_console();
2240 clear_bit(0, &printing);
2243 static struct tty_driver *vt_console_device(struct console *c, int *index)
2245 *index = c->index ? c->index-1 : fg_console;
2246 return console_driver;
2249 struct console vt_console_driver = {
2251 .write = vt_console_print,
2252 .device = vt_console_device,
2253 .unblank = unblank_screen,
2254 .flags = CON_PRINTBUFFER,
2260 * Handling of Linux-specific VC ioctls
2264 * Generally a bit racy with respect to console_sem().
2266 * There are some functions which don't need it.
2268 * There are some functions which can sleep for arbitrary periods
2269 * (paste_selection) but we don't need the lock there anyway.
2271 * set_selection has locking, and definitely needs it
2274 int tioclinux(struct tty_struct *tty, unsigned long arg)
2277 char __user *p = (char __user *)arg;
2281 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2283 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2285 if (get_user(type, p))
2291 acquire_console_sem();
2292 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2293 release_console_sem();
2295 case TIOCL_PASTESEL:
2296 ret = paste_selection(tty);
2298 case TIOCL_UNBLANKSCREEN:
2301 case TIOCL_SELLOADLUT:
2302 ret = sel_loadlut(p);
2304 case TIOCL_GETSHIFTSTATE:
2307 * Make it possible to react to Shift+Mousebutton.
2308 * Note that 'shift_state' is an undocumented
2309 * kernel-internal variable; programs not closely
2310 * related to the kernel should not use this.
2313 ret = __put_user(data, p);
2315 case TIOCL_GETMOUSEREPORTING:
2316 data = mouse_reporting();
2317 ret = __put_user(data, p);
2319 case TIOCL_SETVESABLANK:
2320 set_vesa_blanking(p);
2322 case TIOCL_SETKMSGREDIRECT:
2323 if (!capable(CAP_SYS_ADMIN)) {
2326 if (get_user(data, p+1))
2329 kmsg_redirect = data;
2332 case TIOCL_GETFGCONSOLE:
2335 case TIOCL_SCROLLCONSOLE:
2336 if (get_user(lines, (s32 __user *)(p+4))) {
2343 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2347 case TIOCL_BLANKEDSCREEN:
2348 ret = console_blanked;
2358 * /dev/ttyN handling
2361 static int con_write(struct tty_struct *tty, int from_user,
2362 const unsigned char *buf, int count)
2367 retval = do_con_write(tty, from_user, buf, count);
2368 con_flush_chars(tty);
2373 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2376 return; /* n_r3964 calls put_char() from interrupt context */
2378 do_con_write(tty, 0, &ch, 1);
2381 static int con_write_room(struct tty_struct *tty)
2385 return 4096; /* No limit, really; we're not buffering */
2388 static int con_chars_in_buffer(struct tty_struct *tty)
2390 return 0; /* we're not buffering */
2394 * con_throttle and con_unthrottle are only used for
2395 * paste_selection(), which has to stuff in a large number of
2398 static void con_throttle(struct tty_struct *tty)
2402 static void con_unthrottle(struct tty_struct *tty)
2404 struct vt_struct *vt = tty->driver_data;
2406 wake_up_interruptible(&vt->paste_wait);
2410 * Turn the Scroll-Lock LED on when the tty is stopped
2412 static void con_stop(struct tty_struct *tty)
2417 console_num = tty->index;
2418 if (!vc_cons_allocated(console_num))
2420 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2425 * Turn the Scroll-Lock LED off when the console is started
2427 static void con_start(struct tty_struct *tty)
2432 console_num = tty->index;
2433 if (!vc_cons_allocated(console_num))
2435 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2439 static void con_flush_chars(struct tty_struct *tty)
2441 struct vt_struct *vt;
2443 if (in_interrupt()) /* from flush_to_ldisc */
2448 /* if we race with con_close(), vt may be null */
2449 acquire_console_sem();
2450 vt = tty->driver_data;
2452 set_cursor(vt->vc_num);
2453 release_console_sem();
2457 * Allocate the console screen memory.
2459 static int con_open(struct tty_struct *tty, struct file *filp)
2461 unsigned int currcons = tty->index;
2464 acquire_console_sem();
2465 if (tty->count == 1) {
2466 ret = vc_allocate(currcons);
2468 vt_cons[currcons]->vc_num = currcons;
2469 tty->driver_data = vt_cons[currcons];
2470 vc_cons[currcons].d->vc_tty = tty;
2472 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2473 tty->winsize.ws_row = video_num_lines;
2474 tty->winsize.ws_col = video_num_columns;
2476 release_console_sem();
2477 vcs_make_devfs(tty);
2481 release_console_sem();
2486 * We take tty_sem in here to prevent another thread from coming in via init_dev
2487 * and taking a ref against the tty while we're in the process of forgetting
2488 * about it and cleaning things up.
2490 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2492 static void con_close(struct tty_struct *tty, struct file *filp)
2495 acquire_console_sem();
2496 if (tty && tty->count == 1) {
2497 struct vt_struct *vt;
2499 vt = tty->driver_data;
2501 vc_cons[vt->vc_num].d->vc_tty = NULL;
2502 tty->driver_data = NULL;
2503 release_console_sem();
2504 vcs_remove_devfs(tty);
2507 * tty_sem is released, but we still hold BKL, so there is
2508 * still exclusion against init_dev()
2512 release_console_sem();
2516 static void vc_init(unsigned int currcons, unsigned int rows,
2517 unsigned int cols, int do_clear)
2521 video_num_columns = cols;
2522 video_num_lines = rows;
2523 video_size_row = cols<<1;
2524 screenbuf_size = video_num_lines * video_size_row;
2526 set_origin(currcons);
2529 for (j=k=0; j<16; j++) {
2530 vc_cons[currcons].d->vc_palette[k++] = default_red[j] ;
2531 vc_cons[currcons].d->vc_palette[k++] = default_grn[j] ;
2532 vc_cons[currcons].d->vc_palette[k++] = default_blu[j] ;
2534 def_color = 0x07; /* white */
2535 ulcolor = 0x0f; /* bold white */
2536 halfcolor = 0x08; /* grey */
2537 init_waitqueue_head(&vt_cons[currcons]->paste_wait);
2538 reset_terminal(currcons, do_clear);
2542 * This routine initializes console interrupts, and does nothing
2543 * else. If you want the screen to clear, call tty_write with
2544 * the appropriate escape-sequence.
2547 static int __init con_init(void)
2549 const char *display_desc = NULL;
2550 unsigned int currcons = 0;
2552 acquire_console_sem();
2555 display_desc = conswitchp->con_startup();
2556 if (!display_desc) {
2558 release_console_sem();
2562 init_timer(&console_timer);
2563 console_timer.function = blank_screen_t;
2564 if (blankinterval) {
2565 blank_state = blank_normal_wait;
2566 mod_timer(&console_timer, jiffies + blankinterval);
2570 * kmalloc is not running yet - we use the bootmem allocator.
2572 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2573 vc_cons[currcons].d = (struct vc_data *)
2574 alloc_bootmem(sizeof(struct vc_data));
2575 vt_cons[currcons] = (struct vt_struct *)
2576 alloc_bootmem(sizeof(struct vt_struct));
2577 visual_init(currcons, 1);
2578 screenbuf = (unsigned short *) alloc_bootmem(screenbuf_size);
2580 vc_init(currcons, video_num_lines, video_num_columns,
2581 currcons || !sw->con_save_screen);
2583 currcons = fg_console = 0;
2584 master_display_fg = vc_cons[currcons].d;
2585 set_origin(currcons);
2586 save_screen(currcons);
2587 gotoxy(currcons,x,y);
2589 update_screen(fg_console);
2590 printk("Console: %s %s %dx%d",
2591 can_do_color ? "colour" : "mono",
2592 display_desc, video_num_columns, video_num_lines);
2596 release_console_sem();
2598 #ifdef CONFIG_VT_CONSOLE
2599 register_console(&vt_console_driver);
2603 console_initcall(con_init);
2605 static struct tty_operations con_ops = {
2609 .write_room = con_write_room,
2610 .put_char = con_put_char,
2611 .flush_chars = con_flush_chars,
2612 .chars_in_buffer = con_chars_in_buffer,
2616 .throttle = con_throttle,
2617 .unthrottle = con_unthrottle,
2620 int __init vty_init(void)
2624 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2625 if (!console_driver)
2626 panic("Couldn't allocate console driver\n");
2627 console_driver->owner = THIS_MODULE;
2628 console_driver->devfs_name = "vc/";
2629 console_driver->name = "tty";
2630 console_driver->name_base = 1;
2631 console_driver->major = TTY_MAJOR;
2632 console_driver->minor_start = 1;
2633 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2634 console_driver->init_termios = tty_std_termios;
2635 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2636 tty_set_operations(console_driver, &con_ops);
2637 if (tty_register_driver(console_driver))
2638 panic("Couldn't register console driver\n");
2642 #ifdef CONFIG_PROM_CONSOLE
2645 #ifdef CONFIG_MDA_CONSOLE
2648 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
2654 #ifndef VT_SINGLE_DRIVER
2656 static void clear_buffer_attributes(int currcons)
2658 unsigned short *p = (unsigned short *) origin;
2659 int count = screenbuf_size/2;
2660 int mask = hi_font_mask | 0xff;
2662 for (; count > 0; count--, p++) {
2663 scr_writew((scr_readw(p)&mask) | (video_erase_char&~mask), p);
2668 * If we support more console drivers, this function is used
2669 * when a driver wants to take over some existing consoles
2670 * and become default driver for newly opened ones.
2673 int take_over_console(const struct consw *csw, int first, int last, int deflt)
2677 struct module *owner;
2680 if (!try_module_get(owner))
2683 acquire_console_sem();
2685 desc = csw->con_startup();
2687 release_console_sem();
2693 module_put(conswitchp->owner);
2694 __module_get(owner);
2698 for (i = first; i <= last; i++) {
2702 if (con_driver_map[i])
2703 module_put(con_driver_map[i]->owner);
2704 __module_get(owner);
2705 con_driver_map[i] = csw;
2707 if (!vc_cons[i].d || !vc_cons[i].d->vc_sw)
2713 old_was_color = vc_cons[i].d->vc_can_do_color;
2714 vc_cons[i].d->vc_sw->con_deinit(vc_cons[i].d);
2715 origin = (unsigned long) screenbuf;
2716 visible_origin = origin;
2717 scr_end = origin + screenbuf_size;
2718 pos = origin + video_size_row*y + 2*x;
2722 /* If the console changed between mono <-> color, then
2723 * the attributes in the screenbuf will be wrong. The
2724 * following resets all attributes to something sane.
2726 if (old_was_color != vc_cons[i].d->vc_can_do_color)
2727 clear_buffer_attributes(i);
2732 printk("Console: switching ");
2734 printk("consoles %d-%d ", first+1, last+1);
2736 printk("to %s %s %dx%d\n",
2737 vc_cons[j].d->vc_can_do_color ? "colour" : "mono",
2738 desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows);
2740 printk("to %s\n", desc);
2742 release_console_sem();
2748 void give_up_console(const struct consw *csw)
2752 for(i = 0; i < MAX_NR_CONSOLES; i++)
2753 if (con_driver_map[i] == csw) {
2754 module_put(csw->owner);
2755 con_driver_map[i] = NULL;
2765 static void set_vesa_blanking(char __user *p)
2768 get_user(mode, p + 1);
2769 vesa_blank_mode = (mode < 4) ? mode : 0;
2773 * This is called by a timer handler
2775 static void vesa_powerdown(void)
2777 struct vc_data *c = vc_cons[fg_console].d;
2779 * Power down if currently suspended (1 or 2),
2780 * suspend if currently blanked (0),
2781 * else do nothing (i.e. already powered down (3)).
2782 * Called only if powerdown features are allowed.
2784 switch (vesa_blank_mode) {
2785 case VESA_NO_BLANKING:
2786 c->vc_sw->con_blank(c, VESA_VSYNC_SUSPEND+1, 0);
2788 case VESA_VSYNC_SUSPEND:
2789 case VESA_HSYNC_SUSPEND:
2790 c->vc_sw->con_blank(c, VESA_POWERDOWN+1, 0);
2795 void do_blank_screen(int entering_gfx)
2797 int currcons = fg_console;
2800 WARN_CONSOLE_UNLOCKED();
2802 if (console_blanked) {
2803 if (blank_state == blank_vesa_wait) {
2804 blank_state = blank_off;
2810 if (blank_state != blank_normal_wait)
2812 blank_state = blank_off;
2814 /* entering graphics mode? */
2816 hide_cursor(currcons);
2817 save_screen(currcons);
2818 sw->con_blank(vc_cons[currcons].d, -1, 1);
2819 console_blanked = fg_console + 1;
2820 set_origin(currcons);
2824 /* don't blank graphics */
2825 if (vcmode != KD_TEXT) {
2826 console_blanked = fg_console + 1;
2830 hide_cursor(currcons);
2831 del_timer_sync(&console_timer);
2832 blank_timer_expired = 0;
2834 save_screen(currcons);
2835 /* In case we need to reset origin, blanking hook returns 1 */
2836 i = sw->con_blank(vc_cons[currcons].d, 1, 0);
2837 console_blanked = fg_console + 1;
2839 set_origin(currcons);
2841 if (console_blank_hook && console_blank_hook(1))
2844 if (vesa_off_interval) {
2845 blank_state = blank_vesa_wait,
2846 mod_timer(&console_timer, jiffies + vesa_off_interval);
2849 if (vesa_blank_mode)
2850 sw->con_blank(vc_cons[currcons].d, vesa_blank_mode + 1, 0);
2855 * Called by timer as well as from vt_console_driver
2857 void do_unblank_screen(int leaving_gfx)
2861 WARN_CONSOLE_UNLOCKED();
2864 if (!console_blanked)
2866 if (!vc_cons_allocated(fg_console)) {
2868 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
2871 currcons = fg_console;
2872 if (vcmode != KD_TEXT)
2873 return; /* but leave console_blanked != 0 */
2875 if (blankinterval) {
2876 mod_timer(&console_timer, jiffies + blankinterval);
2877 blank_state = blank_normal_wait;
2880 console_blanked = 0;
2881 if (sw->con_blank(vc_cons[currcons].d, 0, leaving_gfx))
2882 /* Low-level driver cannot restore -> do it ourselves */
2883 update_screen(fg_console);
2884 if (console_blank_hook)
2885 console_blank_hook(0);
2886 set_palette(currcons);
2887 set_cursor(fg_console);
2891 * This is called by the outside world to cause a forced unblank, mostly for
2892 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
2893 * call it with 1 as an argument and so force a mode restore... that may kill
2894 * X or at least garbage the screen but would also make the Oops visible...
2896 void unblank_screen(void)
2898 do_unblank_screen(0);
2902 * We defer the timer blanking to work queue so it can take the console semaphore
2903 * (console operations can still happen at irq time, but only from printk which
2904 * has the console semaphore. Not perfect yet, but better than no locking
2906 static void blank_screen_t(unsigned long dummy)
2908 blank_timer_expired = 1;
2909 schedule_work(&console_work);
2912 void poke_blanked_console(void)
2914 WARN_CONSOLE_UNLOCKED();
2916 /* This isn't perfectly race free, but a race here would be mostly harmless,
2917 * at worse, we'll do a spurrious blank and it's unlikely
2919 del_timer(&console_timer);
2920 blank_timer_expired = 0;
2922 if (ignore_poke || !vt_cons[fg_console] || vt_cons[fg_console]->vc_mode == KD_GRAPHICS)
2924 if (console_blanked)
2926 else if (blankinterval) {
2927 mod_timer(&console_timer, jiffies + blankinterval);
2928 blank_state = blank_normal_wait;
2936 void set_palette(int currcons)
2938 WARN_CONSOLE_UNLOCKED();
2940 if (vcmode != KD_GRAPHICS)
2941 sw->con_set_palette(vc_cons[currcons].d, color_table);
2944 static int set_get_cmap(unsigned char __user *arg, int set)
2948 WARN_CONSOLE_UNLOCKED();
2950 for (i = 0; i < 16; i++)
2952 get_user(default_red[i], arg++);
2953 get_user(default_grn[i], arg++);
2954 get_user(default_blu[i], arg++);
2956 put_user(default_red[i], arg++);
2957 put_user(default_grn[i], arg++);
2958 put_user(default_blu[i], arg++);
2961 for (i = 0; i < MAX_NR_CONSOLES; i++)
2962 if (vc_cons_allocated(i)) {
2963 for (j = k = 0; j < 16; j++) {
2964 vc_cons[i].d->vc_palette[k++] = default_red[j];
2965 vc_cons[i].d->vc_palette[k++] = default_grn[j];
2966 vc_cons[i].d->vc_palette[k++] = default_blu[j];
2975 * Load palette into the DAC registers. arg points to a colour
2976 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
2979 int con_set_cmap(unsigned char __user *arg)
2983 acquire_console_sem();
2984 rc = set_get_cmap (arg,1);
2985 release_console_sem();
2990 int con_get_cmap(unsigned char __user *arg)
2994 acquire_console_sem();
2995 rc = set_get_cmap (arg,0);
2996 release_console_sem();
3001 void reset_palette(int currcons)
3004 for (j=k=0; j<16; j++) {
3005 palette[k++] = default_red[j];
3006 palette[k++] = default_grn[j];
3007 palette[k++] = default_blu[j];
3009 set_palette(currcons);
3015 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3016 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3017 * depending on width) reserved for each character which is kinda wasty, but
3018 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3019 * is upto the actual low-level console-driver convert data into its favorite
3020 * format (maybe we should add a `fontoffset' field to the `display'
3021 * structure so we won't have to convert the fontdata all the time.
3025 #define max_font_size 65536
3027 int con_font_get(int currcons, struct console_font_op *op)
3029 struct console_font font;
3033 if (vt_cons[currcons]->vc_mode != KD_TEXT)
3037 font.data = kmalloc(max_font_size, GFP_KERNEL);
3043 acquire_console_sem();
3044 if (sw->con_font_get)
3045 rc = sw->con_font_get(vc_cons[currcons].d, &font);
3048 release_console_sem();
3053 c = (font.width+7)/8 * 32 * font.charcount;
3055 if (op->data && font.charcount > op->charcount)
3057 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3058 if (font.width > op->width || font.height > op->height)
3061 if (font.width != 8)
3063 else if ((op->height && font.height > op->height) ||
3070 if (op->data && copy_to_user(op->data, font.data, c))
3078 int con_font_set(int currcons, struct console_font_op *op)
3080 struct console_font font;
3084 if (vt_cons[currcons]->vc_mode != KD_TEXT)
3088 if (op->charcount > 512)
3090 if (!op->height) { /* Need to guess font height [compat] */
3092 u8 __user *charmap = op->data;
3095 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3096 so that we can get rid of this soon */
3097 if (!(op->flags & KD_FONT_FLAG_OLD))
3099 for (h = 32; h > 0; h--)
3100 for (i = 0; i < op->charcount; i++) {
3101 if (get_user(tmp, &charmap[32*i+h-1]))
3110 if (op->width <= 0 || op->width > 32 || op->height > 32)
3112 size = (op->width+7)/8 * 32 * op->charcount;
3113 if (size > max_font_size)
3115 font.charcount = op->charcount;
3116 font.height = op->height;
3117 font.width = op->width;
3118 font.data = kmalloc(size, GFP_KERNEL);
3121 if (copy_from_user(font.data, op->data, size)) {
3125 acquire_console_sem();
3126 if (sw->con_font_set)
3127 rc = sw->con_font_set(vc_cons[currcons].d, &font, op->flags);
3130 release_console_sem();
3135 int con_font_default(int currcons, struct console_font_op *op)
3137 struct console_font font = {.width = op->width, .height = op->height};
3138 char name[MAX_FONT_NAME];
3142 if (vt_cons[currcons]->vc_mode != KD_TEXT)
3147 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3150 name[MAX_FONT_NAME - 1] = 0;
3152 acquire_console_sem();
3153 if (sw->con_font_default)
3154 rc = sw->con_font_default(vc_cons[currcons].d, &font, s);
3157 release_console_sem();
3159 op->width = font.width;
3160 op->height = font.height;
3165 int con_font_copy(int currcons, struct console_font_op *op)
3167 int con = op->height;
3171 if (vt_cons[currcons]->vc_mode != KD_TEXT)
3174 acquire_console_sem();
3175 vc = vc_cons[currcons].d;
3176 if (!sw->con_font_copy)
3178 else if (con < 0 || !vc_cons_allocated(con))
3180 else if (con == vc->vc_num) /* nothing to do */
3183 rc = sw->con_font_copy(vc, con);
3184 release_console_sem();
3188 int con_font_op(int currcons, struct console_font_op *op)
3191 case KD_FONT_OP_SET:
3192 return con_font_set(currcons, op);
3193 case KD_FONT_OP_GET:
3194 return con_font_get(currcons, op);
3195 case KD_FONT_OP_SET_DEFAULT:
3196 return con_font_default(currcons, op);
3197 case KD_FONT_OP_COPY:
3198 return con_font_copy(currcons, op);
3204 * Interface exported to selection and vcs.
3207 /* used by selection */
3208 u16 screen_glyph(int currcons, int offset)
3210 u16 w = scr_readw(screenpos(currcons, offset, 1));
3213 if (w & hi_font_mask)
3218 /* used by vcs - note the word offset */
3219 unsigned short *screen_pos(int currcons, int w_offset, int viewed)
3221 return screenpos(currcons, 2 * w_offset, viewed);
3224 void getconsxy(int currcons, unsigned char *p)
3230 void putconsxy(int currcons, unsigned char *p)
3232 gotoxy(currcons, p[0], p[1]);
3233 set_cursor(currcons);
3236 u16 vcs_scr_readw(int currcons, const u16 *org)
3238 if ((unsigned long)org == pos && softcursor_original != -1)
3239 return softcursor_original;
3240 return scr_readw(org);
3243 void vcs_scr_writew(int currcons, u16 val, u16 *org)
3245 scr_writew(val, org);
3246 if ((unsigned long)org == pos) {
3247 softcursor_original = -1;
3248 add_softcursor(currcons);
3252 static int pm_con_request(struct pm_dev *dev, pm_request_t rqst, void *data)
3257 acquire_console_sem();
3259 release_console_sem();
3262 acquire_console_sem();
3264 release_console_sem();
3271 * Visible symbols for modules
3274 EXPORT_SYMBOL(color_table);
3275 EXPORT_SYMBOL(default_red);
3276 EXPORT_SYMBOL(default_grn);
3277 EXPORT_SYMBOL(default_blu);
3278 EXPORT_SYMBOL(vc_cons_allocated);
3279 EXPORT_SYMBOL(update_region);
3280 EXPORT_SYMBOL(redraw_screen);
3281 EXPORT_SYMBOL(vc_resize);
3282 EXPORT_SYMBOL(fg_console);
3283 EXPORT_SYMBOL(console_blank_hook);
3284 EXPORT_SYMBOL(console_blanked);
3285 EXPORT_SYMBOL(vt_cons);
3286 EXPORT_SYMBOL(vc_cons);
3287 #ifndef VT_SINGLE_DRIVER
3288 EXPORT_SYMBOL(take_over_console);
3289 EXPORT_SYMBOL(give_up_console);