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 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
87 #include <linux/console.h>
88 #include <linux/init.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>
97 #include <linux/bootmem.h>
99 #include <linux/font.h>
100 #include <linux/bitops.h>
103 #include <asm/system.h>
104 #include <asm/uaccess.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
112 const struct consw *con;
114 struct class_device *class_dev;
121 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
122 const struct consw *conswitchp;
124 /* A bitmap for codes <32. A bit of 1 indicates that the code
125 * corresponding to that bit number invokes some special action
126 * (such as cursor movement) and should not be displayed as a
127 * glyph unless the disp_ctrl mode is explicitly enabled.
129 #define CTRL_ACTION 0x0d00ff81
130 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
133 * Here is the default bell parameters: 750HZ, 1/8th of a second
135 #define DEFAULT_BELL_PITCH 750
136 #define DEFAULT_BELL_DURATION (HZ/8)
138 extern void vcs_make_sysfs(struct tty_struct *tty);
139 extern void vcs_remove_sysfs(struct tty_struct *tty);
141 extern void console_map_init(void);
142 #ifdef CONFIG_PROM_CONSOLE
143 extern void prom_con_init(void);
145 #ifdef CONFIG_MDA_CONSOLE
146 extern int mda_console_init(void);
149 struct vc vc_cons [MAX_NR_CONSOLES];
151 #ifndef VT_SINGLE_DRIVER
152 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
155 static int con_open(struct tty_struct *, struct file *);
156 static void vc_init(struct vc_data *vc, unsigned int rows,
157 unsigned int cols, int do_clear);
158 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
159 static void save_cur(struct vc_data *vc);
160 static void reset_terminal(struct vc_data *vc, int do_clear);
161 static void con_flush_chars(struct tty_struct *tty);
162 static void set_vesa_blanking(char __user *p);
163 static void set_cursor(struct vc_data *vc);
164 static void hide_cursor(struct vc_data *vc);
165 static void console_callback(void *ignored);
166 static void blank_screen_t(unsigned long dummy);
167 static void set_palette(struct vc_data *vc);
169 static int printable; /* Is console ready for printing? */
172 * ignore_poke: don't unblank the screen when things are typed. This is
173 * mainly for the privacy of braille terminal users.
175 static int ignore_poke;
177 int do_poke_blanked_console;
180 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
181 static int blankinterval = 10*60*HZ;
182 static int vesa_off_interval;
184 static DECLARE_WORK(console_work, console_callback, NULL);
187 * fg_console is the current virtual console,
188 * last_console is the last used one,
189 * want_console is the console we want to switch to,
190 * kmsg_redirect is the console for kernel messages,
194 int want_console = -1;
198 * For each existing display, we have a pointer to console currently visible
199 * on that display, allowing consoles other than fg_console to be refreshed
200 * appropriately. Unless the low-level driver supplies its own display_fg
201 * variable, we use this one for the "master display".
203 static struct vc_data *master_display_fg;
206 * Unfortunately, we need to delay tty echo when we're currently writing to the
207 * console since the code is (and always was) not re-entrant, so we schedule
208 * all flip requests to process context with schedule-task() and run it from
209 * console_callback().
213 * For the same reason, we defer scrollback to the console callback.
215 static int scrollback_delta;
218 * Hook so that the power management routines can (un)blank
219 * the console on our behalf.
221 int (*console_blank_hook)(int);
223 static struct timer_list console_timer;
224 static int blank_state;
225 static int blank_timer_expired;
233 * Low-Level Functions
236 #define IS_FG(vc) ((vc)->vc_num == fg_console)
238 #ifdef VT_BUF_VRAM_ONLY
239 #define DO_UPDATE(vc) 0
241 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
244 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
249 p = (unsigned short *)(vc->vc_origin + offset);
250 else if (!vc->vc_sw->con_screen_pos)
251 p = (unsigned short *)(vc->vc_visible_origin + offset);
253 p = vc->vc_sw->con_screen_pos(vc, offset);
257 static inline void scrolldelta(int lines)
259 scrollback_delta += lines;
260 schedule_console_callback();
263 void schedule_console_callback(void)
265 schedule_work(&console_work);
268 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
270 unsigned short *d, *s;
274 if (b > vc->vc_rows || t >= b || nr < 1)
276 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
278 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
279 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
280 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
281 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
282 vc->vc_size_row * nr);
285 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
292 if (b > vc->vc_rows || t >= b || nr < 1)
294 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
296 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
297 step = vc->vc_cols * nr;
298 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
299 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
302 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
304 #ifndef VT_BUF_VRAM_ONLY
305 unsigned int xx, yy, offset;
309 if (!vc->vc_sw->con_getxy) {
310 offset = (start - vc->vc_origin) / 2;
311 xx = offset % vc->vc_cols;
312 yy = offset / vc->vc_cols;
315 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
319 u16 attrib = scr_readw(p) & 0xff00;
322 while (xx < vc->vc_cols && count) {
323 if (attrib != (scr_readw(p) & 0xff00)) {
325 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
328 attrib = scr_readw(p) & 0xff00;
335 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
340 if (vc->vc_sw->con_getxy) {
342 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
348 void update_region(struct vc_data *vc, unsigned long start, int count)
350 WARN_CONSOLE_UNLOCKED();
354 do_update_region(vc, start, count);
359 /* Structure of attributes is hardware-dependent */
361 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
363 if (vc->vc_sw->con_build_attr)
364 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
366 #ifndef VT_BUF_VRAM_ONLY
368 * ++roman: I completely changed the attribute format for monochrome
369 * mode (!can_do_color). The formerly used MDA (monochrome display
370 * adapter) format didn't allow the combination of certain effects.
371 * Now the attribute is just a bit vector:
372 * Bit 0..1: intensity (0..2)
379 if (!vc->vc_can_do_color)
381 (_underline ? 4 : 0) |
385 a = (a & 0xf0) | vc->vc_ulcolor;
386 else if (_intensity == 0)
387 a = (a & 0xf0) | vc->vc_ulcolor;
389 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
394 if (vc->vc_hi_font_mask == 0x100)
403 static void update_attr(struct vc_data *vc)
405 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
406 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
409 /* Note: inverting the screen twice should revert to the original state */
410 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
414 WARN_CONSOLE_UNLOCKED();
417 p = screenpos(vc, offset, viewed);
418 if (vc->vc_sw->con_invert_region)
419 vc->vc_sw->con_invert_region(vc, p, count);
420 #ifndef VT_BUF_VRAM_ONLY
426 if (!vc->vc_can_do_color) {
433 } else if (vc->vc_hi_font_mask == 0x100) {
436 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
443 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
451 do_update_region(vc, (unsigned long) p, count);
454 /* used by selection: complement pointer position */
455 void complement_pos(struct vc_data *vc, int offset)
457 static int old_offset = -1;
458 static unsigned short old;
459 static unsigned short oldx, oldy;
461 WARN_CONSOLE_UNLOCKED();
463 if (old_offset != -1 && old_offset >= 0 &&
464 old_offset < vc->vc_screenbuf_size) {
465 scr_writew(old, screenpos(vc, old_offset, 1));
467 vc->vc_sw->con_putc(vc, old, oldy, oldx);
472 if (offset != -1 && offset >= 0 &&
473 offset < vc->vc_screenbuf_size) {
476 p = screenpos(vc, offset, 1);
478 new = old ^ vc->vc_complement_mask;
481 oldx = (offset >> 1) % vc->vc_cols;
482 oldy = (offset >> 1) / vc->vc_cols;
483 vc->vc_sw->con_putc(vc, new, oldy, oldx);
489 static void insert_char(struct vc_data *vc, unsigned int nr)
491 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
493 p = q + vc->vc_cols - nr - vc->vc_x;
495 scr_writew(scr_readw(p), p + nr);
496 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
497 vc->vc_need_wrap = 0;
499 unsigned short oldattr = vc->vc_attr;
500 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
501 vc->vc_cols - vc->vc_x - nr);
502 vc->vc_attr = vc->vc_video_erase_char >> 8;
504 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
505 vc->vc_attr = oldattr;
509 static void delete_char(struct vc_data *vc, unsigned int nr)
511 unsigned int i = vc->vc_x;
512 unsigned short *p = (unsigned short *)vc->vc_pos;
514 while (++i <= vc->vc_cols - nr) {
515 scr_writew(scr_readw(p+nr), p);
518 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
519 vc->vc_need_wrap = 0;
521 unsigned short oldattr = vc->vc_attr;
522 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
523 vc->vc_cols - vc->vc_x - nr);
524 vc->vc_attr = vc->vc_video_erase_char >> 8;
526 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
527 vc->vc_cols - 1 - nr);
528 vc->vc_attr = oldattr;
532 static int softcursor_original;
534 static void add_softcursor(struct vc_data *vc)
536 int i = scr_readw((u16 *) vc->vc_pos);
537 u32 type = vc->vc_cursor_type;
539 if (! (type & 0x10)) return;
540 if (softcursor_original != -1) return;
541 softcursor_original = i;
542 i |= ((type >> 8) & 0xff00 );
543 i ^= ((type) & 0xff00 );
544 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
545 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
546 scr_writew(i, (u16 *) vc->vc_pos);
548 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
551 static void hide_softcursor(struct vc_data *vc)
553 if (softcursor_original != -1) {
554 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
556 vc->vc_sw->con_putc(vc, softcursor_original,
558 softcursor_original = -1;
562 static void hide_cursor(struct vc_data *vc)
566 vc->vc_sw->con_cursor(vc, CM_ERASE);
570 static void set_cursor(struct vc_data *vc)
572 if (!IS_FG(vc) || console_blanked ||
573 vc->vc_mode == KD_GRAPHICS)
579 if ((vc->vc_cursor_type & 0x0f) != 1)
580 vc->vc_sw->con_cursor(vc, CM_DRAW);
585 static void set_origin(struct vc_data *vc)
587 WARN_CONSOLE_UNLOCKED();
589 if (!CON_IS_VISIBLE(vc) ||
590 !vc->vc_sw->con_set_origin ||
591 !vc->vc_sw->con_set_origin(vc))
592 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
593 vc->vc_visible_origin = vc->vc_origin;
594 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
595 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
598 static inline void save_screen(struct vc_data *vc)
600 WARN_CONSOLE_UNLOCKED();
602 if (vc->vc_sw->con_save_screen)
603 vc->vc_sw->con_save_screen(vc);
607 * Redrawing of screen
610 static void clear_buffer_attributes(struct vc_data *vc)
612 unsigned short *p = (unsigned short *)vc->vc_origin;
613 int count = vc->vc_screenbuf_size / 2;
614 int mask = vc->vc_hi_font_mask | 0xff;
616 for (; count > 0; count--, p++) {
617 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
621 void redraw_screen(struct vc_data *vc, int is_switch)
625 WARN_CONSOLE_UNLOCKED();
629 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
634 struct vc_data *old_vc = vc_cons[fg_console].d;
637 if (!CON_IS_VISIBLE(vc))
639 *vc->vc_display_fg = vc;
640 fg_console = vc->vc_num;
642 if (!CON_IS_VISIBLE(old_vc)) {
653 int old_was_color = vc->vc_can_do_color;
656 update = vc->vc_sw->con_switch(vc);
659 * If console changed from mono<->color, the best we can do
660 * is to clear the buffer attributes. As it currently stands,
661 * rebuilding new attributes from the old buffer is not doable
662 * without overly complex code.
664 if (old_was_color != vc->vc_can_do_color) {
666 clear_buffer_attributes(vc);
668 if (update && vc->vc_mode != KD_GRAPHICS)
669 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
674 compute_shiftstate();
679 * Allocation, freeing and resizing of VTs.
682 int vc_cons_allocated(unsigned int i)
684 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
687 static void visual_init(struct vc_data *vc, int num, int init)
689 /* ++Geert: vc->vc_sw->con_init determines console size */
691 module_put(vc->vc_sw->owner);
692 vc->vc_sw = conswitchp;
693 #ifndef VT_SINGLE_DRIVER
694 if (con_driver_map[num])
695 vc->vc_sw = con_driver_map[num];
697 __module_get(vc->vc_sw->owner);
699 vc->vc_display_fg = &master_display_fg;
700 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
701 vc->vc_uni_pagedir = 0;
702 vc->vc_hi_font_mask = 0;
703 vc->vc_complement_mask = 0;
704 vc->vc_can_do_color = 0;
705 vc->vc_sw->con_init(vc, init);
706 if (!vc->vc_complement_mask)
707 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
708 vc->vc_s_complement_mask = vc->vc_complement_mask;
709 vc->vc_size_row = vc->vc_cols << 1;
710 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
713 int vc_allocate(unsigned int currcons) /* return 0 on success */
715 WARN_CONSOLE_UNLOCKED();
717 if (currcons >= MAX_NR_CONSOLES)
719 if (!vc_cons[currcons].d) {
722 /* prevent users from taking too much memory */
723 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
726 /* due to the granularity of kmalloc, we waste some memory here */
727 /* the alloc is done in two steps, to optimize the common situation
728 of a 25x80 console (structsize=216, screenbuf_size=4000) */
729 /* although the numbers above are not valid since long ago, the
730 point is still up-to-date and the comment still has its value
731 even if only as a historical artifact. --mj, July 1998 */
732 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
735 memset(vc, 0, sizeof(*vc));
736 vc_cons[currcons].d = vc;
737 visual_init(vc, currcons, 1);
738 if (!*vc->vc_uni_pagedir_loc)
739 con_set_default_unimap(vc);
740 if (!vc->vc_kmalloced)
741 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
742 if (!vc->vc_screenbuf) {
744 vc_cons[currcons].d = NULL;
747 vc->vc_kmalloced = 1;
748 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
753 static inline int resize_screen(struct vc_data *vc, int width, int height)
755 /* Resizes the resolution of the display adapater */
758 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
759 err = vc->vc_sw->con_resize(vc, width, height);
764 * Change # of rows and columns (0 means unchanged/the size of fg_console)
765 * [this is to be used together with some user program
766 * like resize that changes the hardware videomode]
768 #define VC_RESIZE_MAXCOL (32767)
769 #define VC_RESIZE_MAXROW (32767)
770 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
772 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
773 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
774 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
776 unsigned short *newscreen;
778 WARN_CONSOLE_UNLOCKED();
783 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
786 new_cols = (cols ? cols : vc->vc_cols);
787 new_rows = (lines ? lines : vc->vc_rows);
788 new_row_size = new_cols << 1;
789 new_screen_size = new_row_size * new_rows;
791 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
794 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
798 old_rows = vc->vc_rows;
799 old_cols = vc->vc_cols;
800 old_row_size = vc->vc_size_row;
801 old_screen_size = vc->vc_screenbuf_size;
803 err = resize_screen(vc, new_cols, new_rows);
809 vc->vc_rows = new_rows;
810 vc->vc_cols = new_cols;
811 vc->vc_size_row = new_row_size;
812 vc->vc_screenbuf_size = new_screen_size;
814 rlth = min(old_row_size, new_row_size);
815 rrem = new_row_size - rlth;
816 old_origin = vc->vc_origin;
817 new_origin = (long) newscreen;
818 new_scr_end = new_origin + new_screen_size;
820 if (vc->vc_y > new_rows) {
821 if (old_rows - vc->vc_y < new_rows) {
823 * Cursor near the bottom, copy contents from the
826 old_origin += (old_rows - new_rows) * old_row_size;
827 end = vc->vc_scr_end;
830 * Cursor is in no man's land, copy 1/2 screenful
831 * from the top and bottom of cursor position
833 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
834 end = old_origin + (old_row_size * new_rows);
838 * Cursor near the top, copy contents from the top of buffer
840 end = (old_rows > new_rows) ? old_origin +
841 (old_row_size * new_rows) :
846 while (old_origin < end) {
847 scr_memcpyw((unsigned short *) new_origin,
848 (unsigned short *) old_origin, rlth);
850 scr_memsetw((void *)(new_origin + rlth),
851 vc->vc_video_erase_char, rrem);
852 old_origin += old_row_size;
853 new_origin += new_row_size;
855 if (new_scr_end > new_origin)
856 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
857 new_scr_end - new_origin);
858 if (vc->vc_kmalloced)
859 kfree(vc->vc_screenbuf);
860 vc->vc_screenbuf = newscreen;
861 vc->vc_kmalloced = 1;
862 vc->vc_screenbuf_size = new_screen_size;
865 /* do part of a reset_terminal() */
867 vc->vc_bottom = vc->vc_rows;
868 gotoxy(vc, vc->vc_x, vc->vc_y);
872 struct winsize ws, *cws = &vc->vc_tty->winsize;
874 memset(&ws, 0, sizeof(ws));
875 ws.ws_row = vc->vc_rows;
876 ws.ws_col = vc->vc_cols;
877 ws.ws_ypixel = vc->vc_scan_lines;
878 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
879 vc->vc_tty->pgrp > 0)
880 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
884 if (CON_IS_VISIBLE(vc))
889 int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
893 acquire_console_sem();
894 rc = vc_resize(vc, cols, lines);
895 release_console_sem();
899 void vc_deallocate(unsigned int currcons)
901 WARN_CONSOLE_UNLOCKED();
903 if (vc_cons_allocated(currcons)) {
904 struct vc_data *vc = vc_cons[currcons].d;
905 vc->vc_sw->con_deinit(vc);
907 module_put(vc->vc_sw->owner);
908 if (vc->vc_kmalloced)
909 kfree(vc->vc_screenbuf);
910 if (currcons >= MIN_NR_CONSOLES)
912 vc_cons[currcons].d = NULL;
920 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
921 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
922 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
924 #define decarm VC_REPEAT
925 #define decckm VC_CKMODE
926 #define kbdapplic VC_APPLIC
930 * this is what the terminal answers to a ESC-Z or csi0c query.
932 #define VT100ID "\033[?1;2c"
933 #define VT102ID "\033[?6c"
935 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
936 8,12,10,14, 9,13,11,15 };
938 /* the default colour table, for VGA+ colour systems */
939 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
940 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
941 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
942 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
943 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
944 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
947 * gotoxy() must verify all boundaries, because the arguments
948 * might also be negative. If the given position is out of
949 * bounds, the cursor is placed at the nearest margin.
951 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
958 if (new_x >= vc->vc_cols)
959 vc->vc_x = vc->vc_cols - 1;
966 max_y = vc->vc_bottom;
973 else if (new_y >= max_y)
974 vc->vc_y = max_y - 1;
977 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
978 vc->vc_need_wrap = 0;
981 /* for absolute user moves, when decom is set */
982 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
984 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
987 void scrollback(struct vc_data *vc, int lines)
990 lines = vc->vc_rows / 2;
994 void scrollfront(struct vc_data *vc, int lines)
997 lines = vc->vc_rows / 2;
1001 static void lf(struct vc_data *vc)
1003 /* don't scroll if above bottom of scrolling region, or
1004 * if below scrolling region
1006 if (vc->vc_y + 1 == vc->vc_bottom)
1007 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1008 else if (vc->vc_y < vc->vc_rows - 1) {
1010 vc->vc_pos += vc->vc_size_row;
1012 vc->vc_need_wrap = 0;
1015 static void ri(struct vc_data *vc)
1017 /* don't scroll if below top of scrolling region, or
1018 * if above scrolling region
1020 if (vc->vc_y == vc->vc_top)
1021 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1022 else if (vc->vc_y > 0) {
1024 vc->vc_pos -= vc->vc_size_row;
1026 vc->vc_need_wrap = 0;
1029 static inline void cr(struct vc_data *vc)
1031 vc->vc_pos -= vc->vc_x << 1;
1032 vc->vc_need_wrap = vc->vc_x = 0;
1035 static inline void bs(struct vc_data *vc)
1040 vc->vc_need_wrap = 0;
1044 static inline void del(struct vc_data *vc)
1049 static void csi_J(struct vc_data *vc, int vpar)
1052 unsigned short * start;
1055 case 0: /* erase from cursor to end of display */
1056 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1057 start = (unsigned short *)vc->vc_pos;
1058 if (DO_UPDATE(vc)) {
1059 /* do in two stages */
1060 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1061 vc->vc_cols - vc->vc_x);
1062 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1063 vc->vc_rows - vc->vc_y - 1,
1067 case 1: /* erase from start to cursor */
1068 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1069 start = (unsigned short *)vc->vc_origin;
1070 if (DO_UPDATE(vc)) {
1071 /* do in two stages */
1072 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1074 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1078 case 2: /* erase whole display */
1079 count = vc->vc_cols * vc->vc_rows;
1080 start = (unsigned short *)vc->vc_origin;
1082 vc->vc_sw->con_clear(vc, 0, 0,
1089 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1090 vc->vc_need_wrap = 0;
1093 static void csi_K(struct vc_data *vc, int vpar)
1096 unsigned short * start;
1099 case 0: /* erase from cursor to end of line */
1100 count = vc->vc_cols - vc->vc_x;
1101 start = (unsigned short *)vc->vc_pos;
1103 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1104 vc->vc_cols - vc->vc_x);
1106 case 1: /* erase from start of line to cursor */
1107 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1108 count = vc->vc_x + 1;
1110 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1113 case 2: /* erase whole line */
1114 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1115 count = vc->vc_cols;
1117 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1123 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1124 vc->vc_need_wrap = 0;
1127 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1133 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1135 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1137 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1138 vc->vc_need_wrap = 0;
1141 static void default_attr(struct vc_data *vc)
1143 vc->vc_intensity = 1;
1144 vc->vc_underline = 0;
1147 vc->vc_color = vc->vc_def_color;
1150 /* console_sem is held */
1151 static void csi_m(struct vc_data *vc)
1155 for (i = 0; i <= vc->vc_npar; i++)
1156 switch (vc->vc_par[i]) {
1157 case 0: /* all attributes off */
1161 vc->vc_intensity = 2;
1164 vc->vc_intensity = 0;
1167 vc->vc_underline = 1;
1175 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1176 * Select primary font, don't display
1177 * control chars if defined, don't set
1180 vc->vc_translate = set_translate(vc->vc_charset == 0
1182 : vc->vc_G1_charset, vc);
1183 vc->vc_disp_ctrl = 0;
1184 vc->vc_toggle_meta = 0;
1186 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1187 * Select first alternate font, lets
1188 * chars < 32 be displayed as ROM chars.
1190 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1191 vc->vc_disp_ctrl = 1;
1192 vc->vc_toggle_meta = 0;
1194 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1195 * Select second alternate font, toggle
1196 * high bit before displaying as ROM char.
1198 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1199 vc->vc_disp_ctrl = 1;
1200 vc->vc_toggle_meta = 1;
1204 vc->vc_intensity = 1;
1207 vc->vc_underline = 0;
1215 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1216 * Enables underscore, white foreground
1217 * with white underscore (Linux - use
1218 * default foreground).
1220 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1221 vc->vc_underline = 1;
1223 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1224 * Disable underline option.
1225 * Reset colour to default? It did this
1228 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1229 vc->vc_underline = 0;
1232 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1235 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1236 vc->vc_color = color_table[vc->vc_par[i] - 30]
1237 | (vc->vc_color & 0xf0);
1238 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1239 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1240 | (vc->vc_color & 0x0f);
1246 static void respond_string(const char *p, struct tty_struct *tty)
1249 tty_insert_flip_char(tty, *p, 0);
1252 con_schedule_flip(tty);
1255 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1259 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1260 respond_string(buf, tty);
1263 static inline void status_report(struct tty_struct *tty)
1265 respond_string("\033[0n", tty); /* Terminal ok */
1268 static inline void respond_ID(struct tty_struct * tty)
1270 respond_string(VT102ID, tty);
1273 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1277 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1279 respond_string(buf, tty);
1282 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1283 int mouse_reporting(void)
1285 return vc_cons[fg_console].d->vc_report_mouse;
1288 /* console_sem is held */
1289 static void set_mode(struct vc_data *vc, int on_off)
1293 for (i = 0; i <= vc->vc_npar; i++)
1295 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1296 case 1: /* Cursor keys send ^[Ox/^[[x */
1298 set_kbd(vc, decckm);
1300 clr_kbd(vc, decckm);
1302 case 3: /* 80/132 mode switch unimplemented */
1303 vc->vc_deccolm = on_off;
1305 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1306 /* this alone does not suffice; some user mode
1307 utility has to change the hardware regs */
1310 case 5: /* Inverted screen on/off */
1311 if (vc->vc_decscnm != on_off) {
1312 vc->vc_decscnm = on_off;
1313 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1317 case 6: /* Origin relative/absolute */
1318 vc->vc_decom = on_off;
1321 case 7: /* Autowrap on/off */
1322 vc->vc_decawm = on_off;
1324 case 8: /* Autorepeat on/off */
1326 set_kbd(vc, decarm);
1328 clr_kbd(vc, decarm);
1331 vc->vc_report_mouse = on_off ? 1 : 0;
1333 case 25: /* Cursor on/off */
1334 vc->vc_deccm = on_off;
1337 vc->vc_report_mouse = on_off ? 2 : 0;
1341 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1342 case 3: /* Monitor (display ctrls) */
1343 vc->vc_disp_ctrl = on_off;
1345 case 4: /* Insert Mode on/off */
1346 vc->vc_decim = on_off;
1348 case 20: /* Lf, Enter == CrLf/Lf */
1358 /* console_sem is held */
1359 static void setterm_command(struct vc_data *vc)
1361 switch(vc->vc_par[0]) {
1362 case 1: /* set color for underline mode */
1363 if (vc->vc_can_do_color &&
1364 vc->vc_par[1] < 16) {
1365 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1366 if (vc->vc_underline)
1370 case 2: /* set color for half intensity mode */
1371 if (vc->vc_can_do_color &&
1372 vc->vc_par[1] < 16) {
1373 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1374 if (vc->vc_intensity == 0)
1378 case 8: /* store colors as defaults */
1379 vc->vc_def_color = vc->vc_attr;
1380 if (vc->vc_hi_font_mask == 0x100)
1381 vc->vc_def_color >>= 1;
1385 case 9: /* set blanking interval */
1386 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1387 poke_blanked_console();
1389 case 10: /* set bell frequency in Hz */
1390 if (vc->vc_npar >= 1)
1391 vc->vc_bell_pitch = vc->vc_par[1];
1393 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1395 case 11: /* set bell duration in msec */
1396 if (vc->vc_npar >= 1)
1397 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1398 vc->vc_par[1] * HZ / 1000 : 0;
1400 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1402 case 12: /* bring specified console to the front */
1403 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1404 set_console(vc->vc_par[1] - 1);
1406 case 13: /* unblank the screen */
1407 poke_blanked_console();
1409 case 14: /* set vesa powerdown interval */
1410 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1412 case 15: /* activate the previous console */
1413 set_console(last_console);
1418 /* console_sem is held */
1419 static void csi_at(struct vc_data *vc, unsigned int nr)
1421 if (nr > vc->vc_cols - vc->vc_x)
1422 nr = vc->vc_cols - vc->vc_x;
1425 insert_char(vc, nr);
1428 /* console_sem is held */
1429 static void csi_L(struct vc_data *vc, unsigned int nr)
1431 if (nr > vc->vc_rows - vc->vc_y)
1432 nr = vc->vc_rows - vc->vc_y;
1435 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1436 vc->vc_need_wrap = 0;
1439 /* console_sem is held */
1440 static void csi_P(struct vc_data *vc, unsigned int nr)
1442 if (nr > vc->vc_cols - vc->vc_x)
1443 nr = vc->vc_cols - vc->vc_x;
1446 delete_char(vc, nr);
1449 /* console_sem is held */
1450 static void csi_M(struct vc_data *vc, unsigned int nr)
1452 if (nr > vc->vc_rows - vc->vc_y)
1453 nr = vc->vc_rows - vc->vc_y;
1456 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1457 vc->vc_need_wrap = 0;
1460 /* console_sem is held (except via vc_init->reset_terminal */
1461 static void save_cur(struct vc_data *vc)
1463 vc->vc_saved_x = vc->vc_x;
1464 vc->vc_saved_y = vc->vc_y;
1465 vc->vc_s_intensity = vc->vc_intensity;
1466 vc->vc_s_underline = vc->vc_underline;
1467 vc->vc_s_blink = vc->vc_blink;
1468 vc->vc_s_reverse = vc->vc_reverse;
1469 vc->vc_s_charset = vc->vc_charset;
1470 vc->vc_s_color = vc->vc_color;
1471 vc->vc_saved_G0 = vc->vc_G0_charset;
1472 vc->vc_saved_G1 = vc->vc_G1_charset;
1475 /* console_sem is held */
1476 static void restore_cur(struct vc_data *vc)
1478 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1479 vc->vc_intensity = vc->vc_s_intensity;
1480 vc->vc_underline = vc->vc_s_underline;
1481 vc->vc_blink = vc->vc_s_blink;
1482 vc->vc_reverse = vc->vc_s_reverse;
1483 vc->vc_charset = vc->vc_s_charset;
1484 vc->vc_color = vc->vc_s_color;
1485 vc->vc_G0_charset = vc->vc_saved_G0;
1486 vc->vc_G1_charset = vc->vc_saved_G1;
1487 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1489 vc->vc_need_wrap = 0;
1492 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1493 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1496 /* console_sem is held (except via vc_init()) */
1497 static void reset_terminal(struct vc_data *vc, int do_clear)
1500 vc->vc_bottom = vc->vc_rows;
1501 vc->vc_state = ESnormal;
1503 vc->vc_translate = set_translate(LAT1_MAP, vc);
1504 vc->vc_G0_charset = LAT1_MAP;
1505 vc->vc_G1_charset = GRAF_MAP;
1507 vc->vc_need_wrap = 0;
1508 vc->vc_report_mouse = 0;
1510 vc->vc_utf_count = 0;
1512 vc->vc_disp_ctrl = 0;
1513 vc->vc_toggle_meta = 0;
1521 set_kbd(vc, decarm);
1522 clr_kbd(vc, decckm);
1523 clr_kbd(vc, kbdapplic);
1525 kbd_table[vc->vc_num].lockstate = 0;
1526 kbd_table[vc->vc_num].slockstate = 0;
1527 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1528 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1529 /* do not do set_leds here because this causes an endless tasklet loop
1530 when the keyboard hasn't been initialized yet */
1532 vc->vc_cursor_type = CUR_DEFAULT;
1533 vc->vc_complement_mask = vc->vc_s_complement_mask;
1538 vc->vc_tab_stop[0] = 0x01010100;
1539 vc->vc_tab_stop[1] =
1540 vc->vc_tab_stop[2] =
1541 vc->vc_tab_stop[3] =
1542 vc->vc_tab_stop[4] = 0x01010101;
1544 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1545 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1553 /* console_sem is held */
1554 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1557 * Control characters can be used in the _middle_
1558 * of an escape sequence.
1564 if (vc->vc_bell_duration)
1565 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1571 vc->vc_pos -= (vc->vc_x << 1);
1572 while (vc->vc_x < vc->vc_cols - 1) {
1574 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1577 vc->vc_pos += (vc->vc_x << 1);
1579 case 10: case 11: case 12:
1581 if (!is_kbd(vc, lnm))
1588 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1589 vc->vc_disp_ctrl = 1;
1593 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1594 vc->vc_disp_ctrl = 0;
1597 vc->vc_state = ESnormal;
1600 vc->vc_state = ESesc;
1606 vc->vc_state = ESsquare;
1609 switch(vc->vc_state) {
1611 vc->vc_state = ESnormal;
1614 vc->vc_state = ESsquare;
1617 vc->vc_state = ESnonstd;
1620 vc->vc_state = ESpercent;
1633 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1645 vc->vc_state = ESsetG0;
1648 vc->vc_state = ESsetG1;
1651 vc->vc_state = EShash;
1654 reset_terminal(vc, 1);
1656 case '>': /* Numeric keypad */
1657 clr_kbd(vc, kbdapplic);
1659 case '=': /* Appl. keypad */
1660 set_kbd(vc, kbdapplic);
1665 if (c=='P') { /* palette escape sequence */
1666 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1667 vc->vc_par[vc->vc_npar] = 0;
1669 vc->vc_state = ESpalette;
1671 } else if (c=='R') { /* reset palette */
1673 vc->vc_state = ESnormal;
1675 vc->vc_state = ESnormal;
1678 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1679 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1680 if (vc->vc_npar == 7) {
1681 int i = vc->vc_par[0] * 3, j = 1;
1682 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1683 vc->vc_palette[i++] += vc->vc_par[j++];
1684 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1685 vc->vc_palette[i++] += vc->vc_par[j++];
1686 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1687 vc->vc_palette[i] += vc->vc_par[j];
1689 vc->vc_state = ESnormal;
1692 vc->vc_state = ESnormal;
1695 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1696 vc->vc_par[vc->vc_npar] = 0;
1698 vc->vc_state = ESgetpars;
1699 if (c == '[') { /* Function key */
1700 vc->vc_state=ESfunckey;
1703 vc->vc_ques = (c == '?');
1707 if (c == ';' && vc->vc_npar < NPAR - 1) {
1710 } else if (c>='0' && c<='9') {
1711 vc->vc_par[vc->vc_npar] *= 10;
1712 vc->vc_par[vc->vc_npar] += c - '0';
1715 vc->vc_state = ESgotpars;
1717 vc->vc_state = ESnormal;
1728 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1730 vc->vc_cursor_type = CUR_DEFAULT;
1738 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1740 vc->vc_complement_mask = vc->vc_s_complement_mask;
1746 if (vc->vc_par[0] == 5)
1748 else if (vc->vc_par[0] == 6)
1749 cursor_report(vc, tty);
1761 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1766 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1771 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1776 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1781 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1786 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1791 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1796 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1803 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1806 csi_J(vc, vc->vc_par[0]);
1809 csi_K(vc, vc->vc_par[0]);
1812 csi_L(vc, vc->vc_par[0]);
1815 csi_M(vc, vc->vc_par[0]);
1818 csi_P(vc, vc->vc_par[0]);
1826 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1827 else if (vc->vc_par[0] == 3) {
1828 vc->vc_tab_stop[0] =
1829 vc->vc_tab_stop[1] =
1830 vc->vc_tab_stop[2] =
1831 vc->vc_tab_stop[3] =
1832 vc->vc_tab_stop[4] = 0;
1838 case 'q': /* DECLL - but only 3 leds */
1839 /* map 0,1,2,3 to 0,1,2,4 */
1840 if (vc->vc_par[0] < 4)
1841 setledstate(kbd_table + vc->vc_num,
1842 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1848 vc->vc_par[1] = vc->vc_rows;
1849 /* Minimum allowed region is 2 lines */
1850 if (vc->vc_par[0] < vc->vc_par[1] &&
1851 vc->vc_par[1] <= vc->vc_rows) {
1852 vc->vc_top = vc->vc_par[0] - 1;
1853 vc->vc_bottom = vc->vc_par[1];
1864 csi_X(vc, vc->vc_par[0]);
1867 csi_at(vc, vc->vc_par[0]);
1869 case ']': /* setterm functions */
1870 setterm_command(vc);
1875 vc->vc_state = ESnormal;
1877 case '@': /* defined in ISO 2022 */
1880 case 'G': /* prelim official escape code */
1881 case '8': /* retained for compatibility */
1887 vc->vc_state = ESnormal;
1890 vc->vc_state = ESnormal;
1892 /* DEC screen alignment test. kludge :-) */
1893 vc->vc_video_erase_char =
1894 (vc->vc_video_erase_char & 0xff00) | 'E';
1896 vc->vc_video_erase_char =
1897 (vc->vc_video_erase_char & 0xff00) | ' ';
1898 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1903 vc->vc_G0_charset = GRAF_MAP;
1905 vc->vc_G0_charset = LAT1_MAP;
1907 vc->vc_G0_charset = IBMPC_MAP;
1909 vc->vc_G0_charset = USER_MAP;
1910 if (vc->vc_charset == 0)
1911 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1912 vc->vc_state = ESnormal;
1916 vc->vc_G1_charset = GRAF_MAP;
1918 vc->vc_G1_charset = LAT1_MAP;
1920 vc->vc_G1_charset = IBMPC_MAP;
1922 vc->vc_G1_charset = USER_MAP;
1923 if (vc->vc_charset == 1)
1924 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1925 vc->vc_state = ESnormal;
1928 vc->vc_state = ESnormal;
1932 /* This is a temporary buffer used to prepare a tty console write
1933 * so that we can easily avoid touching user space while holding the
1934 * console spinlock. It is allocated in con_init and is shared by
1935 * this code and the vc_screen read/write tty calls.
1937 * We have to allocate this statically in the kernel data section
1938 * since console_init (and thus con_init) are called before any
1939 * kernel memory allocation is available.
1941 char con_buf[CON_BUF_SIZE];
1942 DECLARE_MUTEX(con_buf_sem);
1944 /* acquires console_sem */
1945 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1947 #ifdef VT_BUF_VRAM_ONLY
1948 #define FLUSH do { } while(0);
1950 #define FLUSH if (draw_x >= 0) { \
1951 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1956 int c, tc, ok, n = 0, draw_x = -1;
1957 unsigned int currcons;
1958 unsigned long draw_from = 0, draw_to = 0;
1960 u16 himask, charmask;
1961 const unsigned char *orig_buf = NULL;
1969 acquire_console_sem();
1970 vc = tty->driver_data;
1972 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1973 release_console_sem();
1977 currcons = vc->vc_num;
1978 if (!vc_cons_allocated(currcons)) {
1979 /* could this happen? */
1980 static int error = 0;
1983 printk("con_write: tty %d not allocated\n", currcons+1);
1985 release_console_sem();
1988 release_console_sem();
1993 /* At this point 'buf' is guaranteed to be a kernel buffer
1994 * and therefore no access to userspace (and therefore sleeping)
1995 * will be needed. The con_buf_sem serializes all tty based
1996 * console rendering and vcs write/read operations. We hold
1997 * the console spinlock during the entire write.
2000 acquire_console_sem();
2002 vc = tty->driver_data;
2004 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
2005 release_console_sem();
2009 himask = vc->vc_hi_font_mask;
2010 charmask = himask ? 0x1ff : 0xff;
2012 /* undraw cursor first */
2016 while (!tty->stopped && count) {
2023 /* Do no translation at all in control states */
2024 if (vc->vc_state != ESnormal) {
2026 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2027 /* Combine UTF-8 into Unicode */
2028 /* Malformed sequences as sequences of replacement glyphs */
2031 if (vc->vc_utf_count) {
2032 if ((c & 0xc0) == 0x80) {
2033 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2034 if (--vc->vc_utf_count) {
2038 tc = c = vc->vc_utf_char;
2040 goto replacement_glyph;
2043 if ((c & 0xe0) == 0xc0) {
2044 vc->vc_utf_count = 1;
2045 vc->vc_utf_char = (c & 0x1f);
2046 } else if ((c & 0xf0) == 0xe0) {
2047 vc->vc_utf_count = 2;
2048 vc->vc_utf_char = (c & 0x0f);
2049 } else if ((c & 0xf8) == 0xf0) {
2050 vc->vc_utf_count = 3;
2051 vc->vc_utf_char = (c & 0x07);
2052 } else if ((c & 0xfc) == 0xf8) {
2053 vc->vc_utf_count = 4;
2054 vc->vc_utf_char = (c & 0x03);
2055 } else if ((c & 0xfe) == 0xfc) {
2056 vc->vc_utf_count = 5;
2057 vc->vc_utf_char = (c & 0x01);
2059 goto replacement_glyph;
2063 if (vc->vc_utf_count)
2064 goto replacement_glyph;
2067 } else { /* no utf or alternate charset mode */
2068 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2071 /* If the original code was a control character we
2072 * only allow a glyph to be displayed if the code is
2073 * not normally used (such as for cursor movement) or
2074 * if the disp_ctrl mode has been explicitly enabled.
2075 * Certain characters (as given by the CTRL_ALWAYS
2076 * bitmap) are always displayed as control characters,
2077 * as the console would be pretty useless without
2078 * them; to display an arbitrary font position use the
2079 * direct-to-font zone in UTF-8 mode.
2081 ok = tc && (c >= 32 ||
2082 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2083 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2084 && (c != 127 || vc->vc_disp_ctrl)
2087 if (vc->vc_state == ESnormal && ok) {
2088 /* Now try to find out how to display it */
2089 tc = conv_uni_to_pc(vc, tc);
2090 if (tc & ~charmask) {
2092 /* If we got -4 (not found) then see if we have
2093 defined a replacement character (U+FFFD) */
2095 tc = conv_uni_to_pc(vc, 0xfffd);
2096 if (!(tc & ~charmask))
2098 } else if ( tc != -3 )
2099 continue; /* nothing to display */
2100 /* no hash table or no replacement --
2101 * hope for the best */
2102 if ( c & ~charmask )
2109 if (vc->vc_need_wrap || vc->vc_decim)
2111 if (vc->vc_need_wrap) {
2118 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2119 (vc->vc_attr << 8) + tc,
2120 (u16 *) vc->vc_pos);
2121 if (DO_UPDATE(vc) && draw_x < 0) {
2123 draw_from = vc->vc_pos;
2125 if (vc->vc_x == vc->vc_cols - 1) {
2126 vc->vc_need_wrap = vc->vc_decawm;
2127 draw_to = vc->vc_pos + 2;
2130 draw_to = (vc->vc_pos += 2);
2132 if (vc->vc_utf_count) {
2137 vc->vc_utf_count = 0;
2139 goto rescan_last_byte;
2144 do_con_trol(tty, vc, orig);
2147 console_conditional_schedule();
2148 release_console_sem();
2156 * This is the console switching callback.
2158 * Doing console switching in a process context allows
2159 * us to do the switches asynchronously (needed when we want
2160 * to switch due to a keyboard interrupt). Synchronization
2161 * with other console code and prevention of re-entrancy is
2162 * ensured with console_sem.
2164 static void console_callback(void *ignored)
2166 acquire_console_sem();
2168 if (want_console >= 0) {
2169 if (want_console != fg_console &&
2170 vc_cons_allocated(want_console)) {
2171 hide_cursor(vc_cons[fg_console].d);
2172 change_console(vc_cons[want_console].d);
2173 /* we only changed when the console had already
2174 been allocated - a new console is not created
2175 in an interrupt routine */
2179 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2180 do_poke_blanked_console = 0;
2181 poke_blanked_console();
2183 if (scrollback_delta) {
2184 struct vc_data *vc = vc_cons[fg_console].d;
2186 if (vc->vc_mode == KD_TEXT)
2187 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2188 scrollback_delta = 0;
2190 if (blank_timer_expired) {
2192 blank_timer_expired = 0;
2195 release_console_sem();
2198 void set_console(int nr)
2201 schedule_console_callback();
2204 struct tty_driver *console_driver;
2206 #ifdef CONFIG_VT_CONSOLE
2209 * Console on virtual terminal
2211 * The console must be locked when we get here.
2214 static void vt_console_print(struct console *co, const char *b, unsigned count)
2216 struct vc_data *vc = vc_cons[fg_console].d;
2218 static unsigned long printing;
2219 const ushort *start;
2223 /* console busy or not yet initialized */
2224 if (!printable || test_and_set_bit(0, &printing))
2227 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2228 vc = vc_cons[kmsg_redirect - 1].d;
2230 /* read `x' only after setting currcons properly (otherwise
2231 the `x' macro will read the x of the foreground console). */
2234 if (!vc_cons_allocated(fg_console)) {
2236 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2240 if (vc->vc_mode != KD_TEXT)
2243 /* undraw cursor first */
2247 start = (ushort *)vc->vc_pos;
2249 /* Contrived structure to try to emulate original need_wrap behaviour
2250 * Problems caused when we have need_wrap set on '\n' character */
2253 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2255 if (CON_IS_VISIBLE(vc))
2256 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2258 if (vc->vc_need_wrap)
2262 if (c == 8) { /* backspace */
2264 start = (ushort *)vc->vc_pos;
2271 start = (ushort *)vc->vc_pos;
2273 if (c == 10 || c == 13)
2276 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2278 if (myx == vc->vc_cols - 1) {
2279 vc->vc_need_wrap = 1;
2286 if (CON_IS_VISIBLE(vc))
2287 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2289 if (vc->vc_x == vc->vc_cols) {
2291 vc->vc_need_wrap = 1;
2297 clear_bit(0, &printing);
2300 static struct tty_driver *vt_console_device(struct console *c, int *index)
2302 *index = c->index ? c->index-1 : fg_console;
2303 return console_driver;
2306 static struct console vt_console_driver = {
2308 .write = vt_console_print,
2309 .device = vt_console_device,
2310 .unblank = unblank_screen,
2311 .flags = CON_PRINTBUFFER,
2317 * Handling of Linux-specific VC ioctls
2321 * Generally a bit racy with respect to console_sem().
2323 * There are some functions which don't need it.
2325 * There are some functions which can sleep for arbitrary periods
2326 * (paste_selection) but we don't need the lock there anyway.
2328 * set_selection has locking, and definitely needs it
2331 int tioclinux(struct tty_struct *tty, unsigned long arg)
2334 char __user *p = (char __user *)arg;
2338 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2340 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2342 if (get_user(type, p))
2348 acquire_console_sem();
2349 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2350 release_console_sem();
2352 case TIOCL_PASTESEL:
2353 ret = paste_selection(tty);
2355 case TIOCL_UNBLANKSCREEN:
2356 acquire_console_sem();
2358 release_console_sem();
2360 case TIOCL_SELLOADLUT:
2361 ret = sel_loadlut(p);
2363 case TIOCL_GETSHIFTSTATE:
2366 * Make it possible to react to Shift+Mousebutton.
2367 * Note that 'shift_state' is an undocumented
2368 * kernel-internal variable; programs not closely
2369 * related to the kernel should not use this.
2372 ret = __put_user(data, p);
2374 case TIOCL_GETMOUSEREPORTING:
2375 data = mouse_reporting();
2376 ret = __put_user(data, p);
2378 case TIOCL_SETVESABLANK:
2379 set_vesa_blanking(p);
2381 case TIOCL_GETKMSGREDIRECT:
2382 data = kmsg_redirect;
2383 ret = __put_user(data, p);
2385 case TIOCL_SETKMSGREDIRECT:
2386 if (!capable(CAP_SYS_ADMIN)) {
2389 if (get_user(data, p+1))
2392 kmsg_redirect = data;
2395 case TIOCL_GETFGCONSOLE:
2398 case TIOCL_SCROLLCONSOLE:
2399 if (get_user(lines, (s32 __user *)(p+4))) {
2402 scrollfront(vc_cons[fg_console].d, lines);
2406 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2407 acquire_console_sem();
2410 release_console_sem();
2412 case TIOCL_BLANKEDSCREEN:
2413 ret = console_blanked;
2423 * /dev/ttyN handling
2426 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2430 retval = do_con_write(tty, buf, count);
2431 con_flush_chars(tty);
2436 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2439 return; /* n_r3964 calls put_char() from interrupt context */
2440 do_con_write(tty, &ch, 1);
2443 static int con_write_room(struct tty_struct *tty)
2447 return 4096; /* No limit, really; we're not buffering */
2450 static int con_chars_in_buffer(struct tty_struct *tty)
2452 return 0; /* we're not buffering */
2456 * con_throttle and con_unthrottle are only used for
2457 * paste_selection(), which has to stuff in a large number of
2460 static void con_throttle(struct tty_struct *tty)
2464 static void con_unthrottle(struct tty_struct *tty)
2466 struct vc_data *vc = tty->driver_data;
2468 wake_up_interruptible(&vc->paste_wait);
2472 * Turn the Scroll-Lock LED on when the tty is stopped
2474 static void con_stop(struct tty_struct *tty)
2479 console_num = tty->index;
2480 if (!vc_cons_allocated(console_num))
2482 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2487 * Turn the Scroll-Lock LED off when the console is started
2489 static void con_start(struct tty_struct *tty)
2494 console_num = tty->index;
2495 if (!vc_cons_allocated(console_num))
2497 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2501 static void con_flush_chars(struct tty_struct *tty)
2505 if (in_interrupt()) /* from flush_to_ldisc */
2508 /* if we race with con_close(), vt may be null */
2509 acquire_console_sem();
2510 vc = tty->driver_data;
2513 release_console_sem();
2517 * Allocate the console screen memory.
2519 static int con_open(struct tty_struct *tty, struct file *filp)
2521 unsigned int currcons = tty->index;
2524 acquire_console_sem();
2525 if (tty->driver_data == NULL) {
2526 ret = vc_allocate(currcons);
2528 struct vc_data *vc = vc_cons[currcons].d;
2529 tty->driver_data = vc;
2532 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2533 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2534 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2536 release_console_sem();
2537 vcs_make_sysfs(tty);
2541 release_console_sem();
2546 * We take tty_mutex in here to prevent another thread from coming in via init_dev
2547 * and taking a ref against the tty while we're in the process of forgetting
2548 * about it and cleaning things up.
2550 * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
2552 static void con_close(struct tty_struct *tty, struct file *filp)
2554 mutex_lock(&tty_mutex);
2555 acquire_console_sem();
2556 if (tty && tty->count == 1) {
2557 struct vc_data *vc = tty->driver_data;
2561 tty->driver_data = NULL;
2562 release_console_sem();
2563 vcs_remove_sysfs(tty);
2564 mutex_unlock(&tty_mutex);
2566 * tty_mutex is released, but we still hold BKL, so there is
2567 * still exclusion against init_dev()
2571 release_console_sem();
2572 mutex_unlock(&tty_mutex);
2575 static void vc_init(struct vc_data *vc, unsigned int rows,
2576 unsigned int cols, int do_clear)
2582 vc->vc_size_row = cols << 1;
2583 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2586 vc->vc_pos = vc->vc_origin;
2588 for (j=k=0; j<16; j++) {
2589 vc->vc_palette[k++] = default_red[j] ;
2590 vc->vc_palette[k++] = default_grn[j] ;
2591 vc->vc_palette[k++] = default_blu[j] ;
2593 vc->vc_def_color = 0x07; /* white */
2594 vc->vc_ulcolor = 0x0f; /* bold white */
2595 vc->vc_halfcolor = 0x08; /* grey */
2596 init_waitqueue_head(&vc->paste_wait);
2597 reset_terminal(vc, do_clear);
2601 * This routine initializes console interrupts, and does nothing
2602 * else. If you want the screen to clear, call tty_write with
2603 * the appropriate escape-sequence.
2606 static int __init con_init(void)
2608 const char *display_desc = NULL;
2610 unsigned int currcons = 0, i;
2612 acquire_console_sem();
2615 display_desc = conswitchp->con_startup();
2616 if (!display_desc) {
2618 release_console_sem();
2622 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2623 struct con_driver *con_driver = ®istered_con_driver[i];
2625 if (con_driver->con == NULL) {
2626 con_driver->con = conswitchp;
2627 con_driver->desc = display_desc;
2628 con_driver->flag = CON_DRIVER_FLAG_INIT;
2629 con_driver->first = 0;
2630 con_driver->last = MAX_NR_CONSOLES - 1;
2635 for (i = 0; i < MAX_NR_CONSOLES; i++)
2636 con_driver_map[i] = conswitchp;
2638 init_timer(&console_timer);
2639 console_timer.function = blank_screen_t;
2640 if (blankinterval) {
2641 blank_state = blank_normal_wait;
2642 mod_timer(&console_timer, jiffies + blankinterval);
2646 * kmalloc is not running yet - we use the bootmem allocator.
2648 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2649 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2650 visual_init(vc, currcons, 1);
2651 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2652 vc->vc_kmalloced = 0;
2653 vc_init(vc, vc->vc_rows, vc->vc_cols,
2654 currcons || !vc->vc_sw->con_save_screen);
2656 currcons = fg_console = 0;
2657 master_display_fg = vc = vc_cons[currcons].d;
2660 gotoxy(vc, vc->vc_x, vc->vc_y);
2663 printk("Console: %s %s %dx%d",
2664 vc->vc_can_do_color ? "colour" : "mono",
2665 display_desc, vc->vc_cols, vc->vc_rows);
2669 release_console_sem();
2671 #ifdef CONFIG_VT_CONSOLE
2672 register_console(&vt_console_driver);
2676 console_initcall(con_init);
2678 static const struct tty_operations con_ops = {
2682 .write_room = con_write_room,
2683 .put_char = con_put_char,
2684 .flush_chars = con_flush_chars,
2685 .chars_in_buffer = con_chars_in_buffer,
2689 .throttle = con_throttle,
2690 .unthrottle = con_unthrottle,
2693 int __init vty_init(void)
2697 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2698 if (!console_driver)
2699 panic("Couldn't allocate console driver\n");
2700 console_driver->owner = THIS_MODULE;
2701 console_driver->name = "tty";
2702 console_driver->name_base = 1;
2703 console_driver->major = TTY_MAJOR;
2704 console_driver->minor_start = 1;
2705 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2706 console_driver->init_termios = tty_std_termios;
2707 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2708 tty_set_operations(console_driver, &con_ops);
2709 if (tty_register_driver(console_driver))
2710 panic("Couldn't register console driver\n");
2714 #ifdef CONFIG_PROM_CONSOLE
2717 #ifdef CONFIG_MDA_CONSOLE
2723 #ifndef VT_SINGLE_DRIVER
2724 #include <linux/device.h>
2726 static struct class *vtconsole_class;
2728 static int bind_con_driver(const struct consw *csw, int first, int last,
2731 struct module *owner = csw->owner;
2732 const char *desc = NULL;
2733 struct con_driver *con_driver;
2734 int i, j = -1, k = -1, retval = -ENODEV;
2736 if (!try_module_get(owner))
2739 acquire_console_sem();
2741 /* check if driver is registered */
2742 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2743 con_driver = ®istered_con_driver[i];
2745 if (con_driver->con == csw) {
2746 desc = con_driver->desc;
2755 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2757 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2762 module_put(conswitchp->owner);
2764 __module_get(owner);
2768 first = max(first, con_driver->first);
2769 last = min(last, con_driver->last);
2771 for (i = first; i <= last; i++) {
2773 struct vc_data *vc = vc_cons[i].d;
2775 if (con_driver_map[i])
2776 module_put(con_driver_map[i]->owner);
2777 __module_get(owner);
2778 con_driver_map[i] = csw;
2780 if (!vc || !vc->vc_sw)
2785 if (CON_IS_VISIBLE(vc)) {
2790 old_was_color = vc->vc_can_do_color;
2791 vc->vc_sw->con_deinit(vc);
2792 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2793 visual_init(vc, i, 0);
2797 /* If the console changed between mono <-> color, then
2798 * the attributes in the screenbuf will be wrong. The
2799 * following resets all attributes to something sane.
2801 if (old_was_color != vc->vc_can_do_color)
2802 clear_buffer_attributes(vc);
2805 printk("Console: switching ");
2807 printk("consoles %d-%d ", first+1, last+1);
2809 struct vc_data *vc = vc_cons[j].d;
2811 printk("to %s %s %dx%d\n",
2812 vc->vc_can_do_color ? "colour" : "mono",
2813 desc, vc->vc_cols, vc->vc_rows);
2820 printk("to %s\n", desc);
2824 release_console_sem();
2829 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2830 static int con_is_graphics(const struct consw *csw, int first, int last)
2834 for (i = first; i <= last; i++) {
2835 struct vc_data *vc = vc_cons[i].d;
2837 if (vc && vc->vc_mode == KD_GRAPHICS) {
2846 static int unbind_con_driver(const struct consw *csw, int first, int last,
2849 struct module *owner = csw->owner;
2850 const struct consw *defcsw = NULL;
2851 struct con_driver *con_driver = NULL, *con_back = NULL;
2852 int i, retval = -ENODEV;
2854 if (!try_module_get(owner))
2857 acquire_console_sem();
2859 /* check if driver is registered and if it is unbindable */
2860 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2861 con_driver = ®istered_con_driver[i];
2863 if (con_driver->con == csw &&
2864 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
2871 release_console_sem();
2877 /* check if backup driver exists */
2878 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2879 con_back = ®istered_con_driver[i];
2881 if (con_back->con &&
2882 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
2883 defcsw = con_back->con;
2890 release_console_sem();
2894 if (!con_is_bound(csw)) {
2895 release_console_sem();
2899 first = max(first, con_driver->first);
2900 last = min(last, con_driver->last);
2902 for (i = first; i <= last; i++) {
2903 if (con_driver_map[i] == csw) {
2904 module_put(csw->owner);
2905 con_driver_map[i] = NULL;
2909 if (!con_is_bound(defcsw)) {
2910 const struct consw *defconsw = conswitchp;
2912 defcsw->con_startup();
2913 con_back->flag |= CON_DRIVER_FLAG_INIT;
2915 * vgacon may change the default driver to point
2916 * to dummycon, we restore it here...
2918 conswitchp = defconsw;
2921 if (!con_is_bound(csw))
2922 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
2924 release_console_sem();
2925 /* ignore return value, binding should not fail */
2926 bind_con_driver(defcsw, first, last, deflt);
2933 static int vt_bind(struct con_driver *con)
2935 const struct consw *defcsw = NULL, *csw = NULL;
2936 int i, more = 1, first = -1, last = -1, deflt = 0;
2938 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2939 con_is_graphics(con->con, con->first, con->last))
2944 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2945 struct con_driver *con = ®istered_con_driver[i];
2947 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
2959 for (i = con->first; i <= con->last; i++) {
2960 if (con_driver_map[i] == defcsw) {
2965 } else if (first != -1)
2969 if (first == 0 && last == MAX_NR_CONSOLES -1)
2973 bind_con_driver(csw, first, last, deflt);
2984 static int vt_unbind(struct con_driver *con)
2986 const struct consw *csw = NULL;
2987 int i, more = 1, first = -1, last = -1, deflt = 0;
2989 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
2990 con_is_graphics(con->con, con->first, con->last))
2998 for (i = con->first; i <= con->last; i++) {
2999 if (con_driver_map[i] == csw) {
3004 } else if (first != -1)
3008 if (first == 0 && last == MAX_NR_CONSOLES -1)
3012 unbind_con_driver(csw, first, last, deflt);
3023 static inline int vt_bind(struct con_driver *con)
3027 static inline int vt_unbind(struct con_driver *con)
3031 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3033 static ssize_t store_bind(struct class_device *class_device,
3034 const char *buf, size_t count)
3036 struct con_driver *con = class_get_devdata(class_device);
3037 int bind = simple_strtoul(buf, NULL, 0);
3047 static ssize_t show_bind(struct class_device *class_device, char *buf)
3049 struct con_driver *con = class_get_devdata(class_device);
3050 int bind = con_is_bound(con->con);
3052 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3055 static ssize_t show_name(struct class_device *class_device, char *buf)
3057 struct con_driver *con = class_get_devdata(class_device);
3059 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3060 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3065 static struct class_device_attribute class_device_attrs[] = {
3066 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3067 __ATTR(name, S_IRUGO, show_name, NULL),
3070 static int vtconsole_init_class_device(struct con_driver *con)
3074 class_set_devdata(con->class_dev, con);
3075 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3076 class_device_create_file(con->class_dev,
3077 &class_device_attrs[i]);
3082 static void vtconsole_deinit_class_device(struct con_driver *con)
3086 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3087 class_device_remove_file(con->class_dev,
3088 &class_device_attrs[i]);
3092 * con_is_bound - checks if driver is bound to the console
3093 * @csw: console driver
3095 * RETURNS: zero if unbound, nonzero if bound
3097 * Drivers can call this and if zero, they should release
3098 * all resources allocated on con_startup()
3100 int con_is_bound(const struct consw *csw)
3104 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3105 if (con_driver_map[i] == csw) {
3113 EXPORT_SYMBOL(con_is_bound);
3116 * register_con_driver - register console driver to console layer
3117 * @csw: console driver
3118 * @first: the first console to take over, minimum value is 0
3119 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3121 * DESCRIPTION: This function registers a console driver which can later
3122 * bind to a range of consoles specified by @first and @last. It will
3123 * also initialize the console driver by calling con_startup().
3125 int register_con_driver(const struct consw *csw, int first, int last)
3127 struct module *owner = csw->owner;
3128 struct con_driver *con_driver;
3132 if (!try_module_get(owner))
3135 acquire_console_sem();
3137 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3138 con_driver = ®istered_con_driver[i];
3140 /* already registered */
3141 if (con_driver->con == csw)
3148 desc = csw->con_startup();
3155 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3156 con_driver = ®istered_con_driver[i];
3158 if (con_driver->con == NULL) {
3159 con_driver->con = csw;
3160 con_driver->desc = desc;
3161 con_driver->node = i;
3162 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3163 CON_DRIVER_FLAG_INIT;
3164 con_driver->first = first;
3165 con_driver->last = last;
3174 con_driver->class_dev = class_device_create(vtconsole_class, NULL,
3175 MKDEV(0, con_driver->node),
3179 if (IS_ERR(con_driver->class_dev)) {
3180 printk(KERN_WARNING "Unable to create class_device for %s; "
3181 "errno = %ld\n", con_driver->desc,
3182 PTR_ERR(con_driver->class_dev));
3183 con_driver->class_dev = NULL;
3185 vtconsole_init_class_device(con_driver);
3188 release_console_sem();
3192 EXPORT_SYMBOL(register_con_driver);
3195 * unregister_con_driver - unregister console driver from console layer
3196 * @csw: console driver
3198 * DESCRIPTION: All drivers that registers to the console layer must
3199 * call this function upon exit, or if the console driver is in a state
3200 * where it won't be able to handle console services, such as the
3201 * framebuffer console without loaded framebuffer drivers.
3203 * The driver must unbind first prior to unregistration.
3205 int unregister_con_driver(const struct consw *csw)
3207 int i, retval = -ENODEV;
3209 acquire_console_sem();
3211 /* cannot unregister a bound driver */
3212 if (con_is_bound(csw))
3215 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3216 struct con_driver *con_driver = ®istered_con_driver[i];
3218 if (con_driver->con == csw &&
3219 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3220 vtconsole_deinit_class_device(con_driver);
3221 class_device_destroy(vtconsole_class,
3222 MKDEV(0, con_driver->node));
3223 con_driver->con = NULL;
3224 con_driver->desc = NULL;
3225 con_driver->class_dev = NULL;
3226 con_driver->node = 0;
3227 con_driver->flag = 0;
3228 con_driver->first = 0;
3229 con_driver->last = 0;
3235 release_console_sem();
3238 EXPORT_SYMBOL(unregister_con_driver);
3241 * If we support more console drivers, this function is used
3242 * when a driver wants to take over some existing consoles
3243 * and become default driver for newly opened ones.
3245 * take_over_console is basically a register followed by unbind
3247 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3251 err = register_con_driver(csw, first, last);
3254 bind_con_driver(csw, first, last, deflt);
3260 * give_up_console is a wrapper to unregister_con_driver. It will only
3261 * work if driver is fully unbound.
3263 void give_up_console(const struct consw *csw)
3265 unregister_con_driver(csw);
3268 static int __init vtconsole_class_init(void)
3272 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3273 if (IS_ERR(vtconsole_class)) {
3274 printk(KERN_WARNING "Unable to create vt console class; "
3275 "errno = %ld\n", PTR_ERR(vtconsole_class));
3276 vtconsole_class = NULL;
3279 /* Add system drivers to sysfs */
3280 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3281 struct con_driver *con = ®istered_con_driver[i];
3283 if (con->con && !con->class_dev) {
3285 class_device_create(vtconsole_class, NULL,
3286 MKDEV(0, con->node), NULL,
3287 "vtcon%i", con->node);
3289 if (IS_ERR(con->class_dev)) {
3290 printk(KERN_WARNING "Unable to create "
3291 "class_device for %s; errno = %ld\n",
3292 con->desc, PTR_ERR(con->class_dev));
3293 con->class_dev = NULL;
3295 vtconsole_init_class_device(con);
3302 postcore_initcall(vtconsole_class_init);
3310 static void set_vesa_blanking(char __user *p)
3313 get_user(mode, p + 1);
3314 vesa_blank_mode = (mode < 4) ? mode : 0;
3317 void do_blank_screen(int entering_gfx)
3319 struct vc_data *vc = vc_cons[fg_console].d;
3322 WARN_CONSOLE_UNLOCKED();
3324 if (console_blanked) {
3325 if (blank_state == blank_vesa_wait) {
3326 blank_state = blank_off;
3327 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3331 if (blank_state != blank_normal_wait)
3333 blank_state = blank_off;
3335 /* entering graphics mode? */
3339 vc->vc_sw->con_blank(vc, -1, 1);
3340 console_blanked = fg_console + 1;
3345 /* don't blank graphics */
3346 if (vc->vc_mode != KD_TEXT) {
3347 console_blanked = fg_console + 1;
3352 del_timer_sync(&console_timer);
3353 blank_timer_expired = 0;
3356 /* In case we need to reset origin, blanking hook returns 1 */
3357 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3358 console_blanked = fg_console + 1;
3362 if (console_blank_hook && console_blank_hook(1))
3365 if (vesa_off_interval && vesa_blank_mode) {
3366 blank_state = blank_vesa_wait;
3367 mod_timer(&console_timer, jiffies + vesa_off_interval);
3370 EXPORT_SYMBOL(do_blank_screen);
3373 * Called by timer as well as from vt_console_driver
3375 void do_unblank_screen(int leaving_gfx)
3379 /* This should now always be called from a "sane" (read: can schedule)
3380 * context for the sake of the low level drivers, except in the special
3381 * case of oops_in_progress
3383 if (!oops_in_progress)
3386 WARN_CONSOLE_UNLOCKED();
3389 if (!console_blanked)
3391 if (!vc_cons_allocated(fg_console)) {
3393 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3396 vc = vc_cons[fg_console].d;
3397 if (vc->vc_mode != KD_TEXT)
3398 return; /* but leave console_blanked != 0 */
3400 if (blankinterval) {
3401 mod_timer(&console_timer, jiffies + blankinterval);
3402 blank_state = blank_normal_wait;
3405 console_blanked = 0;
3406 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3407 /* Low-level driver cannot restore -> do it ourselves */
3409 if (console_blank_hook)
3410 console_blank_hook(0);
3414 EXPORT_SYMBOL(do_unblank_screen);
3417 * This is called by the outside world to cause a forced unblank, mostly for
3418 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3419 * call it with 1 as an argument and so force a mode restore... that may kill
3420 * X or at least garbage the screen but would also make the Oops visible...
3422 void unblank_screen(void)
3424 do_unblank_screen(0);
3428 * We defer the timer blanking to work queue so it can take the console mutex
3429 * (console operations can still happen at irq time, but only from printk which
3430 * has the console mutex. Not perfect yet, but better than no locking
3432 static void blank_screen_t(unsigned long dummy)
3434 if (unlikely(!keventd_up())) {
3435 mod_timer(&console_timer, jiffies + blankinterval);
3438 blank_timer_expired = 1;
3439 schedule_work(&console_work);
3442 void poke_blanked_console(void)
3444 WARN_CONSOLE_UNLOCKED();
3446 /* Add this so we quickly catch whoever might call us in a non
3447 * safe context. Nowadays, unblank_screen() isn't to be called in
3448 * atomic contexts and is allowed to schedule (with the special case
3449 * of oops_in_progress, but that isn't of any concern for this
3454 /* This isn't perfectly race free, but a race here would be mostly harmless,
3455 * at worse, we'll do a spurrious blank and it's unlikely
3457 del_timer(&console_timer);
3458 blank_timer_expired = 0;
3460 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3462 if (console_blanked)
3464 else if (blankinterval) {
3465 mod_timer(&console_timer, jiffies + blankinterval);
3466 blank_state = blank_normal_wait;
3474 static void set_palette(struct vc_data *vc)
3476 WARN_CONSOLE_UNLOCKED();
3478 if (vc->vc_mode != KD_GRAPHICS)
3479 vc->vc_sw->con_set_palette(vc, color_table);
3482 static int set_get_cmap(unsigned char __user *arg, int set)
3486 WARN_CONSOLE_UNLOCKED();
3488 for (i = 0; i < 16; i++)
3490 get_user(default_red[i], arg++);
3491 get_user(default_grn[i], arg++);
3492 get_user(default_blu[i], arg++);
3494 put_user(default_red[i], arg++);
3495 put_user(default_grn[i], arg++);
3496 put_user(default_blu[i], arg++);
3499 for (i = 0; i < MAX_NR_CONSOLES; i++)
3500 if (vc_cons_allocated(i)) {
3501 for (j = k = 0; j < 16; j++) {
3502 vc_cons[i].d->vc_palette[k++] = default_red[j];
3503 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3504 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3506 set_palette(vc_cons[i].d);
3513 * Load palette into the DAC registers. arg points to a colour
3514 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3517 int con_set_cmap(unsigned char __user *arg)
3521 acquire_console_sem();
3522 rc = set_get_cmap (arg,1);
3523 release_console_sem();
3528 int con_get_cmap(unsigned char __user *arg)
3532 acquire_console_sem();
3533 rc = set_get_cmap (arg,0);
3534 release_console_sem();
3539 void reset_palette(struct vc_data *vc)
3542 for (j=k=0; j<16; j++) {
3543 vc->vc_palette[k++] = default_red[j];
3544 vc->vc_palette[k++] = default_grn[j];
3545 vc->vc_palette[k++] = default_blu[j];
3553 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3554 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3555 * depending on width) reserved for each character which is kinda wasty, but
3556 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3557 * is upto the actual low-level console-driver convert data into its favorite
3558 * format (maybe we should add a `fontoffset' field to the `display'
3559 * structure so we won't have to convert the fontdata all the time.
3563 #define max_font_size 65536
3565 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3567 struct console_font font;
3571 if (vc->vc_mode != KD_TEXT)
3575 font.data = kmalloc(max_font_size, GFP_KERNEL);
3581 acquire_console_sem();
3582 if (vc->vc_sw->con_font_get)
3583 rc = vc->vc_sw->con_font_get(vc, &font);
3586 release_console_sem();
3591 c = (font.width+7)/8 * 32 * font.charcount;
3593 if (op->data && font.charcount > op->charcount)
3595 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3596 if (font.width > op->width || font.height > op->height)
3599 if (font.width != 8)
3601 else if ((op->height && font.height > op->height) ||
3608 op->height = font.height;
3609 op->width = font.width;
3610 op->charcount = font.charcount;
3612 if (op->data && copy_to_user(op->data, font.data, c))
3620 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3622 struct console_font font;
3626 if (vc->vc_mode != KD_TEXT)
3630 if (op->charcount > 512)
3632 if (!op->height) { /* Need to guess font height [compat] */
3634 u8 __user *charmap = op->data;
3637 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3638 so that we can get rid of this soon */
3639 if (!(op->flags & KD_FONT_FLAG_OLD))
3641 for (h = 32; h > 0; h--)
3642 for (i = 0; i < op->charcount; i++) {
3643 if (get_user(tmp, &charmap[32*i+h-1]))
3652 if (op->width <= 0 || op->width > 32 || op->height > 32)
3654 size = (op->width+7)/8 * 32 * op->charcount;
3655 if (size > max_font_size)
3657 font.charcount = op->charcount;
3658 font.height = op->height;
3659 font.width = op->width;
3660 font.data = kmalloc(size, GFP_KERNEL);
3663 if (copy_from_user(font.data, op->data, size)) {
3667 acquire_console_sem();
3668 if (vc->vc_sw->con_font_set)
3669 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3672 release_console_sem();
3677 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3679 struct console_font font = {.width = op->width, .height = op->height};
3680 char name[MAX_FONT_NAME];
3684 if (vc->vc_mode != KD_TEXT)
3689 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3692 name[MAX_FONT_NAME - 1] = 0;
3694 acquire_console_sem();
3695 if (vc->vc_sw->con_font_default)
3696 rc = vc->vc_sw->con_font_default(vc, &font, s);
3699 release_console_sem();
3701 op->width = font.width;
3702 op->height = font.height;
3707 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3709 int con = op->height;
3712 if (vc->vc_mode != KD_TEXT)
3715 acquire_console_sem();
3716 if (!vc->vc_sw->con_font_copy)
3718 else if (con < 0 || !vc_cons_allocated(con))
3720 else if (con == vc->vc_num) /* nothing to do */
3723 rc = vc->vc_sw->con_font_copy(vc, con);
3724 release_console_sem();
3728 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3731 case KD_FONT_OP_SET:
3732 return con_font_set(vc, op);
3733 case KD_FONT_OP_GET:
3734 return con_font_get(vc, op);
3735 case KD_FONT_OP_SET_DEFAULT:
3736 return con_font_default(vc, op);
3737 case KD_FONT_OP_COPY:
3738 return con_font_copy(vc, op);
3744 * Interface exported to selection and vcs.
3747 /* used by selection */
3748 u16 screen_glyph(struct vc_data *vc, int offset)
3750 u16 w = scr_readw(screenpos(vc, offset, 1));
3753 if (w & vc->vc_hi_font_mask)
3758 /* used by vcs - note the word offset */
3759 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3761 return screenpos(vc, 2 * w_offset, viewed);
3764 void getconsxy(struct vc_data *vc, unsigned char *p)
3770 void putconsxy(struct vc_data *vc, unsigned char *p)
3773 gotoxy(vc, p[0], p[1]);
3777 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3779 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3780 return softcursor_original;
3781 return scr_readw(org);
3784 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3786 scr_writew(val, org);
3787 if ((unsigned long)org == vc->vc_pos) {
3788 softcursor_original = -1;
3794 * Visible symbols for modules
3797 EXPORT_SYMBOL(color_table);
3798 EXPORT_SYMBOL(default_red);
3799 EXPORT_SYMBOL(default_grn);
3800 EXPORT_SYMBOL(default_blu);
3801 EXPORT_SYMBOL(update_region);
3802 EXPORT_SYMBOL(redraw_screen);
3803 EXPORT_SYMBOL(vc_resize);
3804 EXPORT_SYMBOL(vc_lock_resize);
3805 EXPORT_SYMBOL(fg_console);
3806 EXPORT_SYMBOL(console_blank_hook);
3807 EXPORT_SYMBOL(console_blanked);
3808 EXPORT_SYMBOL(vc_cons);
3809 #ifndef VT_SINGLE_DRIVER
3810 EXPORT_SYMBOL(take_over_console);
3811 EXPORT_SYMBOL(give_up_console);