2 * Copyright (C) 1991, 1992 Linus Torvalds
6 * Hopefully this will be a rather complete VT102 implementation.
8 * Beeping thanks to John T Kohl.
10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
11 * Chars, and VT100 enhancements by Peter MacDonald.
13 * Copy and paste function by Andrew Haylett,
14 * some enhancements by Alessandro Rubini.
16 * Code to check for different video-cards mostly by Galen Hunt,
17 * <g-hunt@ee.utah.edu>
19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
23 * Resizing of consoles, aeb, 940926
25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * User-defined bell sound, new setterm control sequences and printk
29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
33 * Merge with the abstract console driver by Geert Uytterhoeven
34 * <geert@linux-m68k.org>, Jan 1997.
36 * Original m68k console driver modifications by
38 * - Arno Griffioen <arno@usn.nl>
39 * - David Carter <carter@cs.bris.ac.uk>
41 * The abstract console driver provides a generic interface for a text
42 * console. It supports VGA text mode, frame buffer based graphical consoles
43 * and special graphics processors that are only accessible through some
44 * registers (e.g. a TMS340x0 GSP).
46 * The interface to the hardware is specified using a special structure
47 * (struct consw) which contains function pointers to console operations
48 * (see <linux/console.h> for more information).
50 * Support for changeable cursor shape
51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
53 * Ported to i386 and con_scrolldelta fixed
54 * by Emmanuel Marty <core@ggi-project.org>, April 1998
56 * Resurrected character buffers in videoram plus lots of other trickery
57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
59 * Removed old-style timers, introduced console_timer, made timer
60 * deletion SMP-safe. 17Jun00, Andrew Morton
62 * Removed console_lock, enabled interrupts across all console operations
63 * 13 March 2001, Andrew Morton
65 * Fixed UTF-8 mode so alternate charset modes always work according
66 * to control sequences interpreted in do_con_trol function
67 * preserving backward VT100 semigraphics compatibility,
68 * malformed UTF sequences represented as sequences of replacement glyphs,
69 * original codes or '?' as a last resort if replacement glyph is undefined
70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 #include <linux/module.h>
74 #include <linux/types.h>
75 #include <linux/sched.h>
76 #include <linux/tty.h>
77 #include <linux/tty_flip.h>
78 #include <linux/kernel.h>
79 #include <linux/string.h>
80 #include <linux/errno.h>
82 #include <linux/slab.h>
83 #include <linux/major.h>
85 #include <linux/console.h>
86 #include <linux/init.h>
87 #include <linux/mutex.h>
88 #include <linux/vt_kern.h>
89 #include <linux/selection.h>
90 #include <linux/tiocl.h>
91 #include <linux/kbd_kern.h>
92 #include <linux/consolemap.h>
93 #include <linux/timer.h>
94 #include <linux/interrupt.h>
95 #include <linux/workqueue.h>
97 #include <linux/font.h>
98 #include <linux/bitops.h>
99 #include <linux/notifier.h>
100 #include <linux/device.h>
101 #include <linux/io.h>
102 #include <linux/uaccess.h>
103 #include <linux/kdb.h>
104 #include <linux/ctype.h>
106 #define MAX_NR_CON_DRIVER 16
108 #define CON_DRIVER_FLAG_MODULE 1
109 #define CON_DRIVER_FLAG_INIT 2
110 #define CON_DRIVER_FLAG_ATTR 4
111 #define CON_DRIVER_FLAG_ZOMBIE 8
114 const struct consw
*con
;
123 static struct con_driver registered_con_driver
[MAX_NR_CON_DRIVER
];
124 const struct consw
*conswitchp
;
126 /* A bitmap for codes <32. A bit of 1 indicates that the code
127 * corresponding to that bit number invokes some special action
128 * (such as cursor movement) and should not be displayed as a
129 * glyph unless the disp_ctrl mode is explicitly enabled.
131 #define CTRL_ACTION 0x0d00ff81
132 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
135 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 #define DEFAULT_BELL_PITCH 750
138 #define DEFAULT_BELL_DURATION (HZ/8)
139 #define DEFAULT_CURSOR_BLINK_MS 200
141 struct vc vc_cons
[MAX_NR_CONSOLES
];
143 #ifndef VT_SINGLE_DRIVER
144 static const struct consw
*con_driver_map
[MAX_NR_CONSOLES
];
147 static int con_open(struct tty_struct
*, struct file
*);
148 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
149 unsigned int cols
, int do_clear
);
150 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
);
151 static void save_cur(struct vc_data
*vc
);
152 static void reset_terminal(struct vc_data
*vc
, int do_clear
);
153 static void con_flush_chars(struct tty_struct
*tty
);
154 static int set_vesa_blanking(char __user
*p
);
155 static void set_cursor(struct vc_data
*vc
);
156 static void hide_cursor(struct vc_data
*vc
);
157 static void console_callback(struct work_struct
*ignored
);
158 static void con_driver_unregister_callback(struct work_struct
*ignored
);
159 static void blank_screen_t(unsigned long dummy
);
160 static void set_palette(struct vc_data
*vc
);
162 #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
164 static int printable
; /* Is console ready for printing? */
165 int default_utf8
= true;
166 module_param(default_utf8
, int, S_IRUGO
| S_IWUSR
);
167 int global_cursor_default
= -1;
168 module_param(global_cursor_default
, int, S_IRUGO
| S_IWUSR
);
170 static int cur_default
= CUR_DEFAULT
;
171 module_param(cur_default
, int, S_IRUGO
| S_IWUSR
);
174 * ignore_poke: don't unblank the screen when things are typed. This is
175 * mainly for the privacy of braille terminal users.
177 static int ignore_poke
;
179 int do_poke_blanked_console
;
182 static int vesa_blank_mode
; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
183 static int vesa_off_interval
;
184 static int blankinterval
= 10*60;
185 core_param(consoleblank
, blankinterval
, int, 0444);
187 static DECLARE_WORK(console_work
, console_callback
);
188 static DECLARE_WORK(con_driver_unregister_work
, con_driver_unregister_callback
);
191 * fg_console is the current virtual console,
192 * last_console is the last used one,
193 * want_console is the console we want to switch to,
194 * saved_* variants are for save/restore around kernel debugger enter/leave
198 int want_console
= -1;
199 static int saved_fg_console
;
200 static int saved_last_console
;
201 static int saved_want_console
;
202 static int saved_vc_mode
;
203 static int saved_console_blanked
;
206 * For each existing display, we have a pointer to console currently visible
207 * on that display, allowing consoles other than fg_console to be refreshed
208 * appropriately. Unless the low-level driver supplies its own display_fg
209 * variable, we use this one for the "master display".
211 static struct vc_data
*master_display_fg
;
214 * Unfortunately, we need to delay tty echo when we're currently writing to the
215 * console since the code is (and always was) not re-entrant, so we schedule
216 * all flip requests to process context with schedule-task() and run it from
217 * console_callback().
221 * For the same reason, we defer scrollback to the console callback.
223 static int scrollback_delta
;
226 * Hook so that the power management routines can (un)blank
227 * the console on our behalf.
229 int (*console_blank_hook
)(int);
231 static DEFINE_TIMER(console_timer
, blank_screen_t
, 0, 0);
232 static int blank_state
;
233 static int blank_timer_expired
;
241 * /sys/class/tty/tty0/
243 * the attribute 'active' contains the name of the current vc
244 * console and it supports poll() to detect vc switches
246 static struct device
*tty0dev
;
249 * Notifier list for console events.
251 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list
);
253 int register_vt_notifier(struct notifier_block
*nb
)
255 return atomic_notifier_chain_register(&vt_notifier_list
, nb
);
257 EXPORT_SYMBOL_GPL(register_vt_notifier
);
259 int unregister_vt_notifier(struct notifier_block
*nb
)
261 return atomic_notifier_chain_unregister(&vt_notifier_list
, nb
);
263 EXPORT_SYMBOL_GPL(unregister_vt_notifier
);
265 static void notify_write(struct vc_data
*vc
, unsigned int unicode
)
267 struct vt_notifier_param param
= { .vc
= vc
, .c
= unicode
};
268 atomic_notifier_call_chain(&vt_notifier_list
, VT_WRITE
, ¶m
);
271 static void notify_update(struct vc_data
*vc
)
273 struct vt_notifier_param param
= { .vc
= vc
};
274 atomic_notifier_call_chain(&vt_notifier_list
, VT_UPDATE
, ¶m
);
277 * Low-Level Functions
280 #define IS_FG(vc) ((vc)->vc_num == fg_console)
282 #ifdef VT_BUF_VRAM_ONLY
283 #define DO_UPDATE(vc) 0
285 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
288 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
293 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
294 else if (!vc
->vc_sw
->con_screen_pos
)
295 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
297 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
301 /* Called from the keyboard irq path.. */
302 static inline void scrolldelta(int lines
)
305 /* scrolldelta needs some kind of consistency lock, but the BKL was
306 and still is not protecting versus the scheduled back end */
307 scrollback_delta
+= lines
;
308 schedule_console_callback();
311 void schedule_console_callback(void)
313 schedule_work(&console_work
);
316 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
318 unsigned short *d
, *s
;
322 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
324 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
326 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
327 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
328 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
329 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
330 vc
->vc_size_row
* nr
);
333 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
340 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
342 if (CON_IS_VISIBLE(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
344 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
345 step
= vc
->vc_cols
* nr
;
346 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
347 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
350 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
352 #ifndef VT_BUF_VRAM_ONLY
353 unsigned int xx
, yy
, offset
;
357 if (!vc
->vc_sw
->con_getxy
) {
358 offset
= (start
- vc
->vc_origin
) / 2;
359 xx
= offset
% vc
->vc_cols
;
360 yy
= offset
/ vc
->vc_cols
;
363 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
367 u16 attrib
= scr_readw(p
) & 0xff00;
370 while (xx
< vc
->vc_cols
&& count
) {
371 if (attrib
!= (scr_readw(p
) & 0xff00)) {
373 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
376 attrib
= scr_readw(p
) & 0xff00;
383 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
388 if (vc
->vc_sw
->con_getxy
) {
390 start
= vc
->vc_sw
->con_getxy(vc
, start
, NULL
, NULL
);
396 void update_region(struct vc_data
*vc
, unsigned long start
, int count
)
398 WARN_CONSOLE_UNLOCKED();
402 do_update_region(vc
, start
, count
);
407 /* Structure of attributes is hardware-dependent */
409 static u8
build_attr(struct vc_data
*vc
, u8 _color
, u8 _intensity
, u8 _blink
,
410 u8 _underline
, u8 _reverse
, u8 _italic
)
412 if (vc
->vc_sw
->con_build_attr
)
413 return vc
->vc_sw
->con_build_attr(vc
, _color
, _intensity
,
414 _blink
, _underline
, _reverse
, _italic
);
416 #ifndef VT_BUF_VRAM_ONLY
418 * ++roman: I completely changed the attribute format for monochrome
419 * mode (!can_do_color). The formerly used MDA (monochrome display
420 * adapter) format didn't allow the combination of certain effects.
421 * Now the attribute is just a bit vector:
422 * Bit 0..1: intensity (0..2)
429 if (!vc
->vc_can_do_color
)
432 (_underline
? 4 : 0) |
436 a
= (a
& 0xF0) | vc
->vc_itcolor
;
438 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
439 else if (_intensity
== 0)
440 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
442 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
447 if (vc
->vc_hi_font_mask
== 0x100)
456 static void update_attr(struct vc_data
*vc
)
458 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
459 vc
->vc_blink
, vc
->vc_underline
,
460 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
461 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
464 /* Note: inverting the screen twice should revert to the original state */
465 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
469 WARN_CONSOLE_UNLOCKED();
472 p
= screenpos(vc
, offset
, viewed
);
473 if (vc
->vc_sw
->con_invert_region
)
474 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
475 #ifndef VT_BUF_VRAM_ONLY
481 if (!vc
->vc_can_do_color
) {
488 } else if (vc
->vc_hi_font_mask
== 0x100) {
491 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
498 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
506 do_update_region(vc
, (unsigned long) p
, count
);
510 /* used by selection: complement pointer position */
511 void complement_pos(struct vc_data
*vc
, int offset
)
513 static int old_offset
= -1;
514 static unsigned short old
;
515 static unsigned short oldx
, oldy
;
517 WARN_CONSOLE_UNLOCKED();
519 if (old_offset
!= -1 && old_offset
>= 0 &&
520 old_offset
< vc
->vc_screenbuf_size
) {
521 scr_writew(old
, screenpos(vc
, old_offset
, 1));
523 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
529 if (offset
!= -1 && offset
>= 0 &&
530 offset
< vc
->vc_screenbuf_size
) {
533 p
= screenpos(vc
, offset
, 1);
535 new = old
^ vc
->vc_complement_mask
;
538 oldx
= (offset
>> 1) % vc
->vc_cols
;
539 oldy
= (offset
>> 1) / vc
->vc_cols
;
540 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
546 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
548 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
550 scr_memmovew(p
+ nr
, p
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
551 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
552 vc
->vc_need_wrap
= 0;
554 do_update_region(vc
, (unsigned long) p
,
555 vc
->vc_cols
- vc
->vc_x
);
558 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
560 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
562 scr_memcpyw(p
, p
+ nr
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
563 scr_memsetw(p
+ vc
->vc_cols
- vc
->vc_x
- nr
, vc
->vc_video_erase_char
,
565 vc
->vc_need_wrap
= 0;
567 do_update_region(vc
, (unsigned long) p
,
568 vc
->vc_cols
- vc
->vc_x
);
571 static int softcursor_original
;
573 static void add_softcursor(struct vc_data
*vc
)
575 int i
= scr_readw((u16
*) vc
->vc_pos
);
576 u32 type
= vc
->vc_cursor_type
;
578 if (! (type
& 0x10)) return;
579 if (softcursor_original
!= -1) return;
580 softcursor_original
= i
;
581 i
|= ((type
>> 8) & 0xff00 );
582 i
^= ((type
) & 0xff00 );
583 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
584 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
585 scr_writew(i
, (u16
*) vc
->vc_pos
);
587 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
590 static void hide_softcursor(struct vc_data
*vc
)
592 if (softcursor_original
!= -1) {
593 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
595 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
597 softcursor_original
= -1;
601 static void hide_cursor(struct vc_data
*vc
)
605 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
609 static void set_cursor(struct vc_data
*vc
)
611 if (!IS_FG(vc
) || console_blanked
||
612 vc
->vc_mode
== KD_GRAPHICS
)
618 if ((vc
->vc_cursor_type
& 0x0f) != 1)
619 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
624 static void set_origin(struct vc_data
*vc
)
626 WARN_CONSOLE_UNLOCKED();
628 if (!CON_IS_VISIBLE(vc
) ||
629 !vc
->vc_sw
->con_set_origin
||
630 !vc
->vc_sw
->con_set_origin(vc
))
631 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
632 vc
->vc_visible_origin
= vc
->vc_origin
;
633 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
634 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
637 static inline void save_screen(struct vc_data
*vc
)
639 WARN_CONSOLE_UNLOCKED();
641 if (vc
->vc_sw
->con_save_screen
)
642 vc
->vc_sw
->con_save_screen(vc
);
646 * Redrawing of screen
649 void clear_buffer_attributes(struct vc_data
*vc
)
651 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
652 int count
= vc
->vc_screenbuf_size
/ 2;
653 int mask
= vc
->vc_hi_font_mask
| 0xff;
655 for (; count
> 0; count
--, p
++) {
656 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
660 void redraw_screen(struct vc_data
*vc
, int is_switch
)
664 WARN_CONSOLE_UNLOCKED();
668 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
673 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
676 if (!CON_IS_VISIBLE(vc
))
678 *vc
->vc_display_fg
= vc
;
679 fg_console
= vc
->vc_num
;
681 if (!CON_IS_VISIBLE(old_vc
)) {
686 sysfs_notify(&tty0dev
->kobj
, NULL
, "active");
694 int old_was_color
= vc
->vc_can_do_color
;
697 update
= vc
->vc_sw
->con_switch(vc
);
700 * If console changed from mono<->color, the best we can do
701 * is to clear the buffer attributes. As it currently stands,
702 * rebuilding new attributes from the old buffer is not doable
703 * without overly complex code.
705 if (old_was_color
!= vc
->vc_can_do_color
) {
707 clear_buffer_attributes(vc
);
710 /* Forcibly update if we're panicing */
711 if ((update
&& vc
->vc_mode
!= KD_GRAPHICS
) ||
712 vt_force_oops_output(vc
))
713 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
718 compute_shiftstate();
724 * Allocation, freeing and resizing of VTs.
727 int vc_cons_allocated(unsigned int i
)
729 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
732 static void visual_init(struct vc_data
*vc
, int num
, int init
)
734 /* ++Geert: vc->vc_sw->con_init determines console size */
736 module_put(vc
->vc_sw
->owner
);
737 vc
->vc_sw
= conswitchp
;
738 #ifndef VT_SINGLE_DRIVER
739 if (con_driver_map
[num
])
740 vc
->vc_sw
= con_driver_map
[num
];
742 __module_get(vc
->vc_sw
->owner
);
744 vc
->vc_display_fg
= &master_display_fg
;
745 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
746 vc
->vc_uni_pagedir
= NULL
;
747 vc
->vc_hi_font_mask
= 0;
748 vc
->vc_complement_mask
= 0;
749 vc
->vc_can_do_color
= 0;
750 vc
->vc_panic_force_write
= false;
751 vc
->vc_sw
->con_init(vc
, init
);
752 if (!vc
->vc_complement_mask
)
753 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
754 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
755 vc
->vc_size_row
= vc
->vc_cols
<< 1;
756 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
759 int vc_allocate(unsigned int currcons
) /* return 0 on success */
761 WARN_CONSOLE_UNLOCKED();
763 if (currcons
>= MAX_NR_CONSOLES
)
765 if (!vc_cons
[currcons
].d
) {
767 struct vt_notifier_param param
;
769 /* prevent users from taking too much memory */
770 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
773 /* due to the granularity of kmalloc, we waste some memory here */
774 /* the alloc is done in two steps, to optimize the common situation
775 of a 25x80 console (structsize=216, screenbuf_size=4000) */
776 /* although the numbers above are not valid since long ago, the
777 point is still up-to-date and the comment still has its value
778 even if only as a historical artifact. --mj, July 1998 */
779 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
782 vc_cons
[currcons
].d
= vc
;
783 tty_port_init(&vc
->port
);
784 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
785 visual_init(vc
, currcons
, 1);
786 if (!*vc
->vc_uni_pagedir_loc
)
787 con_set_default_unimap(vc
);
788 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
789 if (!vc
->vc_screenbuf
) {
791 vc_cons
[currcons
].d
= NULL
;
795 /* If no drivers have overridden us and the user didn't pass a
796 boot option, default to displaying the cursor */
797 if (global_cursor_default
== -1)
798 global_cursor_default
= 1;
800 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
801 vcs_make_sysfs(currcons
);
802 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
807 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
810 /* Resizes the resolution of the display adapater */
813 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
814 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
820 * Change # of rows and columns (0 means unchanged/the size of fg_console)
821 * [this is to be used together with some user program
822 * like resize that changes the hardware videomode]
824 #define VC_RESIZE_MAXCOL (32767)
825 #define VC_RESIZE_MAXROW (32767)
828 * vc_do_resize - resizing method for the tty
829 * @tty: tty being resized
830 * @real_tty: real tty (different to tty if a pty/tty pair)
831 * @vc: virtual console private data
835 * Resize a virtual console, clipping according to the actual constraints.
836 * If the caller passes a tty structure then update the termios winsize
837 * information and perform any necessary signal handling.
839 * Caller must hold the console semaphore. Takes the termios rwsem and
840 * ctrl_lock of the tty IFF a tty is passed.
843 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
844 unsigned int cols
, unsigned int lines
)
846 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
848 unsigned int old_rows
, old_row_size
;
849 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
851 unsigned short *newscreen
;
853 WARN_CONSOLE_UNLOCKED();
858 user
= vc
->vc_resize_user
;
859 vc
->vc_resize_user
= 0;
861 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
864 new_cols
= (cols
? cols
: vc
->vc_cols
);
865 new_rows
= (lines
? lines
: vc
->vc_rows
);
866 new_row_size
= new_cols
<< 1;
867 new_screen_size
= new_row_size
* new_rows
;
869 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
872 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
876 old_rows
= vc
->vc_rows
;
877 old_row_size
= vc
->vc_size_row
;
879 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
885 vc
->vc_rows
= new_rows
;
886 vc
->vc_cols
= new_cols
;
887 vc
->vc_size_row
= new_row_size
;
888 vc
->vc_screenbuf_size
= new_screen_size
;
890 rlth
= min(old_row_size
, new_row_size
);
891 rrem
= new_row_size
- rlth
;
892 old_origin
= vc
->vc_origin
;
893 new_origin
= (long) newscreen
;
894 new_scr_end
= new_origin
+ new_screen_size
;
896 if (vc
->vc_y
> new_rows
) {
897 if (old_rows
- vc
->vc_y
< new_rows
) {
899 * Cursor near the bottom, copy contents from the
902 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
905 * Cursor is in no man's land, copy 1/2 screenful
906 * from the top and bottom of cursor position
908 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
912 end
= old_origin
+ old_row_size
* min(old_rows
, new_rows
);
916 while (old_origin
< end
) {
917 scr_memcpyw((unsigned short *) new_origin
,
918 (unsigned short *) old_origin
, rlth
);
920 scr_memsetw((void *)(new_origin
+ rlth
),
921 vc
->vc_video_erase_char
, rrem
);
922 old_origin
+= old_row_size
;
923 new_origin
+= new_row_size
;
925 if (new_scr_end
> new_origin
)
926 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
927 new_scr_end
- new_origin
);
928 kfree(vc
->vc_screenbuf
);
929 vc
->vc_screenbuf
= newscreen
;
930 vc
->vc_screenbuf_size
= new_screen_size
;
933 /* do part of a reset_terminal() */
935 vc
->vc_bottom
= vc
->vc_rows
;
936 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
940 /* Rewrite the requested winsize data with the actual
943 memset(&ws
, 0, sizeof(ws
));
944 ws
.ws_row
= vc
->vc_rows
;
945 ws
.ws_col
= vc
->vc_cols
;
946 ws
.ws_ypixel
= vc
->vc_scan_lines
;
947 tty_do_resize(tty
, &ws
);
950 if (CON_IS_VISIBLE(vc
))
952 vt_event_post(VT_EVENT_RESIZE
, vc
->vc_num
, vc
->vc_num
);
957 * vc_resize - resize a VT
958 * @vc: virtual console
962 * Resize a virtual console as seen from the console end of things. We
963 * use the common vc_do_resize methods to update the structures. The
964 * caller must hold the console sem to protect console internals and
968 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
970 return vc_do_resize(vc
->port
.tty
, vc
, cols
, rows
);
974 * vt_resize - resize a VT
975 * @tty: tty to resize
976 * @ws: winsize attributes
978 * Resize a virtual terminal. This is called by the tty layer as we
979 * register our own handler for resizing. The mutual helper does all
982 * Takes the console sem and the called methods then take the tty
983 * termios_rwsem and the tty ctrl_lock in that order.
985 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
987 struct vc_data
*vc
= tty
->driver_data
;
991 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
996 struct vc_data
*vc_deallocate(unsigned int currcons
)
998 struct vc_data
*vc
= NULL
;
1000 WARN_CONSOLE_UNLOCKED();
1002 if (vc_cons_allocated(currcons
)) {
1003 struct vt_notifier_param param
;
1005 param
.vc
= vc
= vc_cons
[currcons
].d
;
1006 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
1007 vcs_remove_sysfs(currcons
);
1008 vc
->vc_sw
->con_deinit(vc
);
1009 put_pid(vc
->vt_pid
);
1010 module_put(vc
->vc_sw
->owner
);
1011 kfree(vc
->vc_screenbuf
);
1012 vc_cons
[currcons
].d
= NULL
;
1021 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1022 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1023 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1025 #define decarm VC_REPEAT
1026 #define decckm VC_CKMODE
1027 #define kbdapplic VC_APPLIC
1031 * this is what the terminal answers to a ESC-Z or csi0c query.
1033 #define VT100ID "\033[?1;2c"
1034 #define VT102ID "\033[?6c"
1036 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1037 8,12,10,14, 9,13,11,15 };
1039 /* the default colour table, for VGA+ colour systems */
1040 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1041 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1042 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1043 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1044 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1045 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1047 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
1048 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
1049 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
1052 * gotoxy() must verify all boundaries, because the arguments
1053 * might also be negative. If the given position is out of
1054 * bounds, the cursor is placed at the nearest margin.
1056 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1063 if (new_x
>= vc
->vc_cols
)
1064 vc
->vc_x
= vc
->vc_cols
- 1;
1071 max_y
= vc
->vc_bottom
;
1074 max_y
= vc
->vc_rows
;
1078 else if (new_y
>= max_y
)
1079 vc
->vc_y
= max_y
- 1;
1082 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1083 vc
->vc_need_wrap
= 0;
1086 /* for absolute user moves, when decom is set */
1087 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1089 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1092 void scrollback(struct vc_data
*vc
, int lines
)
1095 lines
= vc
->vc_rows
/ 2;
1096 scrolldelta(-lines
);
1099 void scrollfront(struct vc_data
*vc
, int lines
)
1102 lines
= vc
->vc_rows
/ 2;
1106 static void lf(struct vc_data
*vc
)
1108 /* don't scroll if above bottom of scrolling region, or
1109 * if below scrolling region
1111 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1112 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1113 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1115 vc
->vc_pos
+= vc
->vc_size_row
;
1117 vc
->vc_need_wrap
= 0;
1118 notify_write(vc
, '\n');
1121 static void ri(struct vc_data
*vc
)
1123 /* don't scroll if below top of scrolling region, or
1124 * if above scrolling region
1126 if (vc
->vc_y
== vc
->vc_top
)
1127 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1128 else if (vc
->vc_y
> 0) {
1130 vc
->vc_pos
-= vc
->vc_size_row
;
1132 vc
->vc_need_wrap
= 0;
1135 static inline void cr(struct vc_data
*vc
)
1137 vc
->vc_pos
-= vc
->vc_x
<< 1;
1138 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1139 notify_write(vc
, '\r');
1142 static inline void bs(struct vc_data
*vc
)
1147 vc
->vc_need_wrap
= 0;
1148 notify_write(vc
, '\b');
1152 static inline void del(struct vc_data
*vc
)
1157 static void csi_J(struct vc_data
*vc
, int vpar
)
1160 unsigned short * start
;
1163 case 0: /* erase from cursor to end of display */
1164 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1165 start
= (unsigned short *)vc
->vc_pos
;
1167 case 1: /* erase from start to cursor */
1168 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1169 start
= (unsigned short *)vc
->vc_origin
;
1171 case 3: /* erase scroll-back buffer (and whole display) */
1172 scr_memsetw(vc
->vc_screenbuf
, vc
->vc_video_erase_char
,
1173 vc
->vc_screenbuf_size
>> 1);
1175 if (CON_IS_VISIBLE(vc
))
1178 case 2: /* erase whole display */
1179 count
= vc
->vc_cols
* vc
->vc_rows
;
1180 start
= (unsigned short *)vc
->vc_origin
;
1185 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1187 do_update_region(vc
, (unsigned long) start
, count
);
1188 vc
->vc_need_wrap
= 0;
1191 static void csi_K(struct vc_data
*vc
, int vpar
)
1194 unsigned short * start
;
1197 case 0: /* erase from cursor to end of line */
1198 count
= vc
->vc_cols
- vc
->vc_x
;
1199 start
= (unsigned short *)vc
->vc_pos
;
1201 case 1: /* erase from start of line to cursor */
1202 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1203 count
= vc
->vc_x
+ 1;
1205 case 2: /* erase whole line */
1206 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1207 count
= vc
->vc_cols
;
1212 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1213 vc
->vc_need_wrap
= 0;
1215 do_update_region(vc
, (unsigned long) start
, count
);
1218 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1224 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1226 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1228 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1229 vc
->vc_need_wrap
= 0;
1232 static void default_attr(struct vc_data
*vc
)
1234 vc
->vc_intensity
= 1;
1236 vc
->vc_underline
= 0;
1239 vc
->vc_color
= vc
->vc_def_color
;
1242 struct rgb
{ u8 r
; u8 g
; u8 b
; };
1244 static struct rgb
rgb_from_256(int i
)
1247 if (i
< 8) { /* Standard colours. */
1248 c
.r
= i
&1 ? 0xaa : 0x00;
1249 c
.g
= i
&2 ? 0xaa : 0x00;
1250 c
.b
= i
&4 ? 0xaa : 0x00;
1251 } else if (i
< 16) {
1252 c
.r
= i
&1 ? 0xff : 0x55;
1253 c
.g
= i
&2 ? 0xff : 0x55;
1254 c
.b
= i
&4 ? 0xff : 0x55;
1255 } else if (i
< 232) { /* 6x6x6 colour cube. */
1256 c
.r
= (i
- 16) / 36 * 85 / 2;
1257 c
.g
= (i
- 16) / 6 % 6 * 85 / 2;
1258 c
.b
= (i
- 16) % 6 * 85 / 2;
1259 } else /* Grayscale ramp. */
1260 c
.r
= c
.g
= c
.b
= i
* 10 - 2312;
1264 static void rgb_foreground(struct vc_data
*vc
, struct rgb c
)
1271 hue
= (c
.r
> max
/2 ? 4 : 0)
1272 | (c
.g
> max
/2 ? 2 : 0)
1273 | (c
.b
> max
/2 ? 1 : 0);
1274 if (hue
== 7 && max
<= 0x55)
1275 hue
= 0, vc
->vc_intensity
= 2;
1277 vc
->vc_intensity
= (max
> 0xaa) + 1;
1278 vc
->vc_color
= (vc
->vc_color
& 0xf0) | hue
;
1281 static void rgb_background(struct vc_data
*vc
, struct rgb c
)
1283 /* For backgrounds, err on the dark side. */
1284 vc
->vc_color
= (vc
->vc_color
& 0x0f)
1285 | (c
.r
&0x80) >> 1 | (c
.g
&0x80) >> 2 | (c
.b
&0x80) >> 3;
1288 /* console_lock is held */
1289 static void csi_m(struct vc_data
*vc
)
1293 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1294 switch (vc
->vc_par
[i
]) {
1295 case 0: /* all attributes off */
1299 vc
->vc_intensity
= 2;
1302 vc
->vc_intensity
= 0;
1308 vc
->vc_underline
= 1;
1316 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1317 * Select primary font, don't display
1318 * control chars if defined, don't set
1321 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1323 : vc
->vc_G1_charset
, vc
);
1324 vc
->vc_disp_ctrl
= 0;
1325 vc
->vc_toggle_meta
= 0;
1327 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1328 * Select first alternate font, lets
1329 * chars < 32 be displayed as ROM chars.
1331 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1332 vc
->vc_disp_ctrl
= 1;
1333 vc
->vc_toggle_meta
= 0;
1335 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1336 * Select second alternate font, toggle
1337 * high bit before displaying as ROM char.
1339 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1340 vc
->vc_disp_ctrl
= 1;
1341 vc
->vc_toggle_meta
= 1;
1345 vc
->vc_intensity
= 1;
1351 vc
->vc_underline
= 0;
1359 case 38: /* ITU T.416
1360 * Higher colour modes.
1361 * They break the usual properties of SGR codes
1362 * and thus need to be detected and ignored by
1363 * hand. Strictly speaking, that standard also
1364 * wants : rather than ; as separators, contrary
1365 * to ECMA-48, but no one produces such codes
1366 * and almost no one accepts them.
1369 if (i
> vc
->vc_npar
)
1371 if (vc
->vc_par
[i
] == 5 && /* 256 colours */
1372 i
< vc
->vc_npar
) { /* ubiquitous */
1375 rgb_from_256(vc
->vc_par
[i
]));
1376 } else if (vc
->vc_par
[i
] == 2 && /* 24 bit */
1377 i
<= vc
->vc_npar
+ 3) {/* extremely rare */
1379 .r
= vc
->vc_par
[i
+ 1],
1380 .g
= vc
->vc_par
[i
+ 2],
1381 .b
= vc
->vc_par
[i
+ 3],
1383 rgb_foreground(vc
, c
);
1386 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane
1387 * there's no point in supporting them.
1392 if (i
> vc
->vc_npar
)
1394 if (vc
->vc_par
[i
] == 5 && /* 256 colours */
1398 rgb_from_256(vc
->vc_par
[i
]));
1399 } else if (vc
->vc_par
[i
] == 2 && /* 24 bit */
1400 i
<= vc
->vc_npar
+ 3) {
1402 .r
= vc
->vc_par
[i
+ 1],
1403 .g
= vc
->vc_par
[i
+ 2],
1404 .b
= vc
->vc_par
[i
+ 3],
1406 rgb_background(vc
, c
);
1411 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1414 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1417 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1418 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1419 | (vc
->vc_color
& 0xf0);
1420 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1421 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1422 | (vc
->vc_color
& 0x0f);
1428 static void respond_string(const char *p
, struct tty_port
*port
)
1431 tty_insert_flip_char(port
, *p
, 0);
1434 tty_schedule_flip(port
);
1437 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1441 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1442 respond_string(buf
, tty
->port
);
1445 static inline void status_report(struct tty_struct
*tty
)
1447 respond_string("\033[0n", tty
->port
); /* Terminal ok */
1450 static inline void respond_ID(struct tty_struct
*tty
)
1452 respond_string(VT102ID
, tty
->port
);
1455 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1459 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1461 respond_string(buf
, tty
->port
);
1464 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1465 int mouse_reporting(void)
1467 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1470 /* console_lock is held */
1471 static void set_mode(struct vc_data
*vc
, int on_off
)
1475 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1477 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1478 case 1: /* Cursor keys send ^[Ox/^[[x */
1480 set_kbd(vc
, decckm
);
1482 clr_kbd(vc
, decckm
);
1484 case 3: /* 80/132 mode switch unimplemented */
1485 vc
->vc_deccolm
= on_off
;
1487 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1488 /* this alone does not suffice; some user mode
1489 utility has to change the hardware regs */
1492 case 5: /* Inverted screen on/off */
1493 if (vc
->vc_decscnm
!= on_off
) {
1494 vc
->vc_decscnm
= on_off
;
1495 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1499 case 6: /* Origin relative/absolute */
1500 vc
->vc_decom
= on_off
;
1503 case 7: /* Autowrap on/off */
1504 vc
->vc_decawm
= on_off
;
1506 case 8: /* Autorepeat on/off */
1508 set_kbd(vc
, decarm
);
1510 clr_kbd(vc
, decarm
);
1513 vc
->vc_report_mouse
= on_off
? 1 : 0;
1515 case 25: /* Cursor on/off */
1516 vc
->vc_deccm
= on_off
;
1519 vc
->vc_report_mouse
= on_off
? 2 : 0;
1523 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1524 case 3: /* Monitor (display ctrls) */
1525 vc
->vc_disp_ctrl
= on_off
;
1527 case 4: /* Insert Mode on/off */
1528 vc
->vc_decim
= on_off
;
1530 case 20: /* Lf, Enter == CrLf/Lf */
1540 /* console_lock is held */
1541 static void setterm_command(struct vc_data
*vc
)
1543 switch(vc
->vc_par
[0]) {
1544 case 1: /* set color for underline mode */
1545 if (vc
->vc_can_do_color
&&
1546 vc
->vc_par
[1] < 16) {
1547 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1548 if (vc
->vc_underline
)
1552 case 2: /* set color for half intensity mode */
1553 if (vc
->vc_can_do_color
&&
1554 vc
->vc_par
[1] < 16) {
1555 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1556 if (vc
->vc_intensity
== 0)
1560 case 8: /* store colors as defaults */
1561 vc
->vc_def_color
= vc
->vc_attr
;
1562 if (vc
->vc_hi_font_mask
== 0x100)
1563 vc
->vc_def_color
>>= 1;
1567 case 9: /* set blanking interval */
1568 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60;
1569 poke_blanked_console();
1571 case 10: /* set bell frequency in Hz */
1572 if (vc
->vc_npar
>= 1)
1573 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1575 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1577 case 11: /* set bell duration in msec */
1578 if (vc
->vc_npar
>= 1)
1579 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1580 msecs_to_jiffies(vc
->vc_par
[1]) : 0;
1582 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1584 case 12: /* bring specified console to the front */
1585 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1586 set_console(vc
->vc_par
[1] - 1);
1588 case 13: /* unblank the screen */
1589 poke_blanked_console();
1591 case 14: /* set vesa powerdown interval */
1592 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1594 case 15: /* activate the previous console */
1595 set_console(last_console
);
1597 case 16: /* set cursor blink duration in msec */
1598 if (vc
->vc_npar
>= 1 && vc
->vc_par
[1] >= 50 &&
1599 vc
->vc_par
[1] <= USHRT_MAX
)
1600 vc
->vc_cur_blink_ms
= vc
->vc_par
[1];
1602 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1607 /* console_lock is held */
1608 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1610 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1611 nr
= vc
->vc_cols
- vc
->vc_x
;
1614 insert_char(vc
, nr
);
1617 /* console_lock is held */
1618 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1620 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1621 nr
= vc
->vc_rows
- vc
->vc_y
;
1624 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1625 vc
->vc_need_wrap
= 0;
1628 /* console_lock is held */
1629 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1631 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1632 nr
= vc
->vc_cols
- vc
->vc_x
;
1635 delete_char(vc
, nr
);
1638 /* console_lock is held */
1639 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1641 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1642 nr
= vc
->vc_rows
- vc
->vc_y
;
1645 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1646 vc
->vc_need_wrap
= 0;
1649 /* console_lock is held (except via vc_init->reset_terminal */
1650 static void save_cur(struct vc_data
*vc
)
1652 vc
->vc_saved_x
= vc
->vc_x
;
1653 vc
->vc_saved_y
= vc
->vc_y
;
1654 vc
->vc_s_intensity
= vc
->vc_intensity
;
1655 vc
->vc_s_italic
= vc
->vc_italic
;
1656 vc
->vc_s_underline
= vc
->vc_underline
;
1657 vc
->vc_s_blink
= vc
->vc_blink
;
1658 vc
->vc_s_reverse
= vc
->vc_reverse
;
1659 vc
->vc_s_charset
= vc
->vc_charset
;
1660 vc
->vc_s_color
= vc
->vc_color
;
1661 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1662 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1665 /* console_lock is held */
1666 static void restore_cur(struct vc_data
*vc
)
1668 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1669 vc
->vc_intensity
= vc
->vc_s_intensity
;
1670 vc
->vc_italic
= vc
->vc_s_italic
;
1671 vc
->vc_underline
= vc
->vc_s_underline
;
1672 vc
->vc_blink
= vc
->vc_s_blink
;
1673 vc
->vc_reverse
= vc
->vc_s_reverse
;
1674 vc
->vc_charset
= vc
->vc_s_charset
;
1675 vc
->vc_color
= vc
->vc_s_color
;
1676 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1677 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1678 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1680 vc
->vc_need_wrap
= 0;
1683 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESfunckey
,
1684 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1687 /* console_lock is held (except via vc_init()) */
1688 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1691 vc
->vc_bottom
= vc
->vc_rows
;
1692 vc
->vc_state
= ESnormal
;
1694 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1695 vc
->vc_G0_charset
= LAT1_MAP
;
1696 vc
->vc_G1_charset
= GRAF_MAP
;
1698 vc
->vc_need_wrap
= 0;
1699 vc
->vc_report_mouse
= 0;
1700 vc
->vc_utf
= default_utf8
;
1701 vc
->vc_utf_count
= 0;
1703 vc
->vc_disp_ctrl
= 0;
1704 vc
->vc_toggle_meta
= 0;
1709 vc
->vc_deccm
= global_cursor_default
;
1712 vt_reset_keyboard(vc
->vc_num
);
1714 vc
->vc_cursor_type
= cur_default
;
1715 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1720 vc
->vc_tab_stop
[0] = 0x01010100;
1721 vc
->vc_tab_stop
[1] =
1722 vc
->vc_tab_stop
[2] =
1723 vc
->vc_tab_stop
[3] =
1724 vc
->vc_tab_stop
[4] =
1725 vc
->vc_tab_stop
[5] =
1726 vc
->vc_tab_stop
[6] =
1727 vc
->vc_tab_stop
[7] = 0x01010101;
1729 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1730 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1731 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1739 /* console_lock is held */
1740 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1743 * Control characters can be used in the _middle_
1744 * of an escape sequence.
1746 if (vc
->vc_state
== ESosc
&& c
>=8 && c
<=13) /* ... except for OSC */
1752 if (vc
->vc_state
== ESosc
)
1753 vc
->vc_state
= ESnormal
;
1754 else if (vc
->vc_bell_duration
)
1755 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1761 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1762 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1764 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1767 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1768 notify_write(vc
, '\t');
1770 case 10: case 11: case 12:
1772 if (!is_kbd(vc
, lnm
))
1779 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1780 vc
->vc_disp_ctrl
= 1;
1784 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1785 vc
->vc_disp_ctrl
= 0;
1788 vc
->vc_state
= ESnormal
;
1791 vc
->vc_state
= ESesc
;
1797 vc
->vc_state
= ESsquare
;
1800 switch(vc
->vc_state
) {
1802 vc
->vc_state
= ESnormal
;
1805 vc
->vc_state
= ESsquare
;
1808 vc
->vc_state
= ESnonstd
;
1811 vc
->vc_state
= ESpercent
;
1824 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1836 vc
->vc_state
= ESsetG0
;
1839 vc
->vc_state
= ESsetG1
;
1842 vc
->vc_state
= EShash
;
1845 reset_terminal(vc
, 1);
1847 case '>': /* Numeric keypad */
1848 clr_kbd(vc
, kbdapplic
);
1850 case '=': /* Appl. keypad */
1851 set_kbd(vc
, kbdapplic
);
1856 if (c
=='P') { /* palette escape sequence */
1857 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1858 vc
->vc_par
[vc
->vc_npar
] = 0;
1860 vc
->vc_state
= ESpalette
;
1862 } else if (c
=='R') { /* reset palette */
1864 vc
->vc_state
= ESnormal
;
1865 } else if (c
>='0' && c
<='9')
1866 vc
->vc_state
= ESosc
;
1868 vc
->vc_state
= ESnormal
;
1872 vc
->vc_par
[vc
->vc_npar
++] = hex_to_bin(c
);
1873 if (vc
->vc_npar
== 7) {
1874 int i
= vc
->vc_par
[0] * 3, j
= 1;
1875 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1876 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1877 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1878 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1879 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1880 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1882 vc
->vc_state
= ESnormal
;
1885 vc
->vc_state
= ESnormal
;
1888 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1889 vc
->vc_par
[vc
->vc_npar
] = 0;
1891 vc
->vc_state
= ESgetpars
;
1892 if (c
== '[') { /* Function key */
1893 vc
->vc_state
=ESfunckey
;
1896 vc
->vc_ques
= (c
== '?');
1900 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1903 } else if (c
>='0' && c
<='9') {
1904 vc
->vc_par
[vc
->vc_npar
] *= 10;
1905 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1908 vc
->vc_state
= ESnormal
;
1919 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1921 vc
->vc_cursor_type
= cur_default
;
1929 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1931 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1937 if (vc
->vc_par
[0] == 5)
1939 else if (vc
->vc_par
[0] == 6)
1940 cursor_report(vc
, tty
);
1952 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1957 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1962 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1967 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1972 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1977 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1982 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1987 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1994 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1997 csi_J(vc
, vc
->vc_par
[0]);
2000 csi_K(vc
, vc
->vc_par
[0]);
2003 csi_L(vc
, vc
->vc_par
[0]);
2006 csi_M(vc
, vc
->vc_par
[0]);
2009 csi_P(vc
, vc
->vc_par
[0]);
2017 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
2018 else if (vc
->vc_par
[0] == 3) {
2019 vc
->vc_tab_stop
[0] =
2020 vc
->vc_tab_stop
[1] =
2021 vc
->vc_tab_stop
[2] =
2022 vc
->vc_tab_stop
[3] =
2023 vc
->vc_tab_stop
[4] =
2024 vc
->vc_tab_stop
[5] =
2025 vc
->vc_tab_stop
[6] =
2026 vc
->vc_tab_stop
[7] = 0;
2032 case 'q': /* DECLL - but only 3 leds */
2033 /* map 0,1,2,3 to 0,1,2,4 */
2034 if (vc
->vc_par
[0] < 4)
2035 vt_set_led_state(vc
->vc_num
,
2036 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
2042 vc
->vc_par
[1] = vc
->vc_rows
;
2043 /* Minimum allowed region is 2 lines */
2044 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
2045 vc
->vc_par
[1] <= vc
->vc_rows
) {
2046 vc
->vc_top
= vc
->vc_par
[0] - 1;
2047 vc
->vc_bottom
= vc
->vc_par
[1];
2058 csi_X(vc
, vc
->vc_par
[0]);
2061 csi_at(vc
, vc
->vc_par
[0]);
2063 case ']': /* setterm functions */
2064 setterm_command(vc
);
2069 vc
->vc_state
= ESnormal
;
2071 case '@': /* defined in ISO 2022 */
2074 case 'G': /* prelim official escape code */
2075 case '8': /* retained for compatibility */
2081 vc
->vc_state
= ESnormal
;
2084 vc
->vc_state
= ESnormal
;
2086 /* DEC screen alignment test. kludge :-) */
2087 vc
->vc_video_erase_char
=
2088 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2090 vc
->vc_video_erase_char
=
2091 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2092 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2097 vc
->vc_G0_charset
= GRAF_MAP
;
2099 vc
->vc_G0_charset
= LAT1_MAP
;
2101 vc
->vc_G0_charset
= IBMPC_MAP
;
2103 vc
->vc_G0_charset
= USER_MAP
;
2104 if (vc
->vc_charset
== 0)
2105 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2106 vc
->vc_state
= ESnormal
;
2110 vc
->vc_G1_charset
= GRAF_MAP
;
2112 vc
->vc_G1_charset
= LAT1_MAP
;
2114 vc
->vc_G1_charset
= IBMPC_MAP
;
2116 vc
->vc_G1_charset
= USER_MAP
;
2117 if (vc
->vc_charset
== 1)
2118 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2119 vc
->vc_state
= ESnormal
;
2124 vc
->vc_state
= ESnormal
;
2128 /* is_double_width() is based on the wcwidth() implementation by
2129 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2130 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2137 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
2142 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
2144 while (max
>= min
) {
2145 mid
= (min
+ max
) / 2;
2146 if (ucs
> table
[mid
].last
)
2148 else if (ucs
< table
[mid
].first
)
2156 static int is_double_width(uint32_t ucs
)
2158 static const struct interval double_width
[] = {
2159 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2160 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2161 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2162 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2164 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
2167 /* acquires console_lock */
2168 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2170 #ifdef VT_BUF_VRAM_ONLY
2171 #define FLUSH do { } while(0);
2173 #define FLUSH if (draw_x >= 0) { \
2174 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2179 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2180 unsigned int currcons
;
2181 unsigned long draw_from
= 0, draw_to
= 0;
2183 unsigned char vc_attr
;
2184 struct vt_notifier_param param
;
2188 u16 himask
, charmask
;
2196 vc
= tty
->driver_data
;
2198 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2203 currcons
= vc
->vc_num
;
2204 if (!vc_cons_allocated(currcons
)) {
2205 /* could this happen? */
2206 pr_warn_once("con_write: tty %d not allocated\n", currcons
+1);
2211 himask
= vc
->vc_hi_font_mask
;
2212 charmask
= himask
? 0x1ff : 0xff;
2214 /* undraw cursor first */
2220 while (!tty
->stopped
&& count
) {
2230 /* Do no translation at all in control states */
2231 if (vc
->vc_state
!= ESnormal
) {
2233 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2234 /* Combine UTF-8 into Unicode in vc_utf_char.
2235 * vc_utf_count is the number of continuation bytes still
2236 * expected to arrive.
2237 * vc_npar is the number of continuation bytes arrived so
2241 if ((c
& 0xc0) == 0x80) {
2242 /* Continuation byte received */
2243 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2244 if (vc
->vc_utf_count
) {
2245 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2247 if (--vc
->vc_utf_count
) {
2248 /* Still need some bytes */
2251 /* Got a whole character */
2252 c
= vc
->vc_utf_char
;
2253 /* Reject overlong sequences */
2254 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2255 c
> utf8_length_changes
[vc
->vc_npar
])
2258 /* Unexpected continuation byte */
2259 vc
->vc_utf_count
= 0;
2263 /* Single ASCII byte or first byte of a sequence received */
2264 if (vc
->vc_utf_count
) {
2265 /* Continuation byte expected */
2267 vc
->vc_utf_count
= 0;
2269 } else if (c
> 0x7f) {
2270 /* First byte of a multibyte sequence received */
2272 if ((c
& 0xe0) == 0xc0) {
2273 vc
->vc_utf_count
= 1;
2274 vc
->vc_utf_char
= (c
& 0x1f);
2275 } else if ((c
& 0xf0) == 0xe0) {
2276 vc
->vc_utf_count
= 2;
2277 vc
->vc_utf_char
= (c
& 0x0f);
2278 } else if ((c
& 0xf8) == 0xf0) {
2279 vc
->vc_utf_count
= 3;
2280 vc
->vc_utf_char
= (c
& 0x07);
2281 } else if ((c
& 0xfc) == 0xf8) {
2282 vc
->vc_utf_count
= 4;
2283 vc
->vc_utf_char
= (c
& 0x03);
2284 } else if ((c
& 0xfe) == 0xfc) {
2285 vc
->vc_utf_count
= 5;
2286 vc
->vc_utf_char
= (c
& 0x01);
2288 /* 254 and 255 are invalid */
2291 if (vc
->vc_utf_count
) {
2292 /* Still need some bytes */
2296 /* Nothing to do if an ASCII byte was received */
2298 /* End of UTF-8 decoding. */
2299 /* c is the received character, or U+FFFD for invalid sequences. */
2300 /* Replace invalid Unicode code points with U+FFFD too */
2301 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2304 } else { /* no utf or alternate charset mode */
2305 tc
= vc_translate(vc
, c
);
2309 if (atomic_notifier_call_chain(&vt_notifier_list
, VT_PREWRITE
,
2310 ¶m
) == NOTIFY_STOP
)
2313 /* If the original code was a control character we
2314 * only allow a glyph to be displayed if the code is
2315 * not normally used (such as for cursor movement) or
2316 * if the disp_ctrl mode has been explicitly enabled.
2317 * Certain characters (as given by the CTRL_ALWAYS
2318 * bitmap) are always displayed as control characters,
2319 * as the console would be pretty useless without
2320 * them; to display an arbitrary font position use the
2321 * direct-to-font zone in UTF-8 mode.
2323 ok
= tc
&& (c
>= 32 ||
2324 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2325 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2326 && (c
!= 127 || vc
->vc_disp_ctrl
)
2329 if (vc
->vc_state
== ESnormal
&& ok
) {
2330 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2331 if (is_double_width(c
))
2334 /* Now try to find out how to display it */
2335 tc
= conv_uni_to_pc(vc
, tc
);
2336 if (tc
& ~charmask
) {
2337 if (tc
== -1 || tc
== -2) {
2338 continue; /* nothing to display */
2340 /* Glyph not found */
2341 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2342 /* In legacy mode use the glyph we get by a 1:1 mapping.
2343 This would make absolutely no sense with Unicode in mind,
2344 but do this for ASCII characters since a font may lack
2345 Unicode mapping info and we don't want to end up with
2346 having question marks only. */
2349 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2350 tc
= conv_uni_to_pc(vc
, 0xfffd);
2353 tc
= conv_uni_to_pc(vc
, '?');
2354 if (tc
< 0) tc
= '?';
2360 vc_attr
= vc
->vc_attr
;
2362 /* invert vc_attr */
2363 if (!vc
->vc_can_do_color
) {
2364 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2365 } else if (vc
->vc_hi_font_mask
== 0x100) {
2366 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2368 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2374 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2376 if (vc
->vc_need_wrap
) {
2383 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2384 (vc_attr
<< 8) + tc
,
2385 (u16
*) vc
->vc_pos
);
2386 if (DO_UPDATE(vc
) && draw_x
< 0) {
2388 draw_from
= vc
->vc_pos
;
2390 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2391 vc
->vc_need_wrap
= vc
->vc_decawm
;
2392 draw_to
= vc
->vc_pos
+ 2;
2395 draw_to
= (vc
->vc_pos
+= 2);
2398 if (!--width
) break;
2400 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2401 if (tc
< 0) tc
= ' ';
2403 notify_write(vc
, c
);
2414 goto rescan_last_byte
;
2419 do_con_trol(tty
, vc
, orig
);
2422 console_conditional_schedule();
2430 * This is the console switching callback.
2432 * Doing console switching in a process context allows
2433 * us to do the switches asynchronously (needed when we want
2434 * to switch due to a keyboard interrupt). Synchronization
2435 * with other console code and prevention of re-entrancy is
2436 * ensured with console_lock.
2438 static void console_callback(struct work_struct
*ignored
)
2442 if (want_console
>= 0) {
2443 if (want_console
!= fg_console
&&
2444 vc_cons_allocated(want_console
)) {
2445 hide_cursor(vc_cons
[fg_console
].d
);
2446 change_console(vc_cons
[want_console
].d
);
2447 /* we only changed when the console had already
2448 been allocated - a new console is not created
2449 in an interrupt routine */
2453 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2454 do_poke_blanked_console
= 0;
2455 poke_blanked_console();
2457 if (scrollback_delta
) {
2458 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2460 if (vc
->vc_mode
== KD_TEXT
)
2461 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2462 scrollback_delta
= 0;
2464 if (blank_timer_expired
) {
2466 blank_timer_expired
= 0;
2468 notify_update(vc_cons
[fg_console
].d
);
2473 int set_console(int nr
)
2475 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2477 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2478 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2481 * Console switch will fail in console_callback() or
2482 * change_console() so there is no point scheduling
2485 * Existing set_console() users don't check the return
2486 * value so this shouldn't break anything
2492 schedule_console_callback();
2497 struct tty_driver
*console_driver
;
2499 #ifdef CONFIG_VT_CONSOLE
2502 * vt_kmsg_redirect() - Sets/gets the kernel message console
2503 * @new: The new virtual terminal number or -1 if the console should stay
2506 * By default, the kernel messages are always printed on the current virtual
2507 * console. However, the user may modify that default with the
2508 * TIOCL_SETKMSGREDIRECT ioctl call.
2510 * This function sets the kernel message console to be @new. It returns the old
2511 * virtual console number. The virtual terminal number 0 (both as parameter and
2512 * return value) means no redirection (i.e. always printed on the currently
2515 * The parameter -1 means that only the current console is returned, but the
2516 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2517 * case to make the code more understandable.
2519 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2520 * the parameter and always returns 0.
2522 int vt_kmsg_redirect(int new)
2524 static int kmsg_con
;
2527 return xchg(&kmsg_con
, new);
2533 * Console on virtual terminal
2535 * The console must be locked when we get here.
2538 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2540 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2542 static DEFINE_SPINLOCK(printing_lock
);
2543 const ushort
*start
;
2548 /* console busy or not yet initialized */
2551 if (!spin_trylock(&printing_lock
))
2554 kmsg_console
= vt_get_kmsg_redirect();
2555 if (kmsg_console
&& vc_cons_allocated(kmsg_console
- 1))
2556 vc
= vc_cons
[kmsg_console
- 1].d
;
2558 /* read `x' only after setting currcons properly (otherwise
2559 the `x' macro will read the x of the foreground console). */
2562 if (!vc_cons_allocated(fg_console
)) {
2564 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2568 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
2571 /* undraw cursor first */
2575 start
= (ushort
*)vc
->vc_pos
;
2577 /* Contrived structure to try to emulate original need_wrap behaviour
2578 * Problems caused when we have need_wrap set on '\n' character */
2581 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2583 if (CON_IS_VISIBLE(vc
))
2584 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2586 if (vc
->vc_need_wrap
)
2590 if (c
== 8) { /* backspace */
2592 start
= (ushort
*)vc
->vc_pos
;
2599 start
= (ushort
*)vc
->vc_pos
;
2601 if (c
== 10 || c
== 13)
2604 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2605 notify_write(vc
, c
);
2607 if (myx
== vc
->vc_cols
- 1) {
2608 vc
->vc_need_wrap
= 1;
2615 if (CON_IS_VISIBLE(vc
))
2616 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2618 if (vc
->vc_x
== vc
->vc_cols
) {
2620 vc
->vc_need_wrap
= 1;
2627 spin_unlock(&printing_lock
);
2630 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2632 *index
= c
->index
? c
->index
-1 : fg_console
;
2633 return console_driver
;
2636 static struct console vt_console_driver
= {
2638 .write
= vt_console_print
,
2639 .device
= vt_console_device
,
2640 .unblank
= unblank_screen
,
2641 .flags
= CON_PRINTBUFFER
,
2647 * Handling of Linux-specific VC ioctls
2651 * Generally a bit racy with respect to console_lock();.
2653 * There are some functions which don't need it.
2655 * There are some functions which can sleep for arbitrary periods
2656 * (paste_selection) but we don't need the lock there anyway.
2658 * set_selection has locking, and definitely needs it
2661 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2664 char __user
*p
= (char __user
*)arg
;
2668 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2670 if (get_user(type
, p
))
2678 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2681 case TIOCL_PASTESEL
:
2682 ret
= paste_selection(tty
);
2684 case TIOCL_UNBLANKSCREEN
:
2689 case TIOCL_SELLOADLUT
:
2691 ret
= sel_loadlut(p
);
2694 case TIOCL_GETSHIFTSTATE
:
2697 * Make it possible to react to Shift+Mousebutton.
2698 * Note that 'shift_state' is an undocumented
2699 * kernel-internal variable; programs not closely
2700 * related to the kernel should not use this.
2702 data
= vt_get_shift_state();
2703 ret
= __put_user(data
, p
);
2705 case TIOCL_GETMOUSEREPORTING
:
2706 console_lock(); /* May be overkill */
2707 data
= mouse_reporting();
2709 ret
= __put_user(data
, p
);
2711 case TIOCL_SETVESABLANK
:
2713 ret
= set_vesa_blanking(p
);
2716 case TIOCL_GETKMSGREDIRECT
:
2717 data
= vt_get_kmsg_redirect();
2718 ret
= __put_user(data
, p
);
2720 case TIOCL_SETKMSGREDIRECT
:
2721 if (!capable(CAP_SYS_ADMIN
)) {
2724 if (get_user(data
, p
+1))
2727 vt_kmsg_redirect(data
);
2730 case TIOCL_GETFGCONSOLE
:
2731 /* No locking needed as this is a transiently
2732 correct return anyway if the caller hasn't
2733 disabled switching */
2736 case TIOCL_SCROLLCONSOLE
:
2737 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2740 /* Need the console lock here. Note that lots
2741 of other calls need fixing before the lock
2742 is actually useful ! */
2744 scrollfront(vc_cons
[fg_console
].d
, lines
);
2749 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2755 case TIOCL_BLANKEDSCREEN
:
2756 ret
= console_blanked
;
2766 * /dev/ttyN handling
2769 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2773 retval
= do_con_write(tty
, buf
, count
);
2774 con_flush_chars(tty
);
2779 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2782 return 0; /* n_r3964 calls put_char() from interrupt context */
2783 return do_con_write(tty
, &ch
, 1);
2786 static int con_write_room(struct tty_struct
*tty
)
2790 return 32768; /* No limit, really; we're not buffering */
2793 static int con_chars_in_buffer(struct tty_struct
*tty
)
2795 return 0; /* we're not buffering */
2799 * con_throttle and con_unthrottle are only used for
2800 * paste_selection(), which has to stuff in a large number of
2803 static void con_throttle(struct tty_struct
*tty
)
2807 static void con_unthrottle(struct tty_struct
*tty
)
2809 struct vc_data
*vc
= tty
->driver_data
;
2811 wake_up_interruptible(&vc
->paste_wait
);
2815 * Turn the Scroll-Lock LED on when the tty is stopped
2817 static void con_stop(struct tty_struct
*tty
)
2822 console_num
= tty
->index
;
2823 if (!vc_cons_allocated(console_num
))
2825 vt_kbd_con_stop(console_num
);
2829 * Turn the Scroll-Lock LED off when the console is started
2831 static void con_start(struct tty_struct
*tty
)
2836 console_num
= tty
->index
;
2837 if (!vc_cons_allocated(console_num
))
2839 vt_kbd_con_start(console_num
);
2842 static void con_flush_chars(struct tty_struct
*tty
)
2846 if (in_interrupt()) /* from flush_to_ldisc */
2849 /* if we race with con_close(), vt may be null */
2851 vc
= tty
->driver_data
;
2858 * Allocate the console screen memory.
2860 static int con_install(struct tty_driver
*driver
, struct tty_struct
*tty
)
2862 unsigned int currcons
= tty
->index
;
2867 ret
= vc_allocate(currcons
);
2871 vc
= vc_cons
[currcons
].d
;
2873 /* Still being freed */
2879 ret
= tty_port_install(&vc
->port
, driver
, tty
);
2883 tty
->driver_data
= vc
;
2886 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2887 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2888 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2891 tty
->termios
.c_iflag
|= IUTF8
;
2893 tty
->termios
.c_iflag
&= ~IUTF8
;
2899 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2901 /* everything done in install */
2906 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2908 /* Nothing to do - we defer to shutdown */
2911 static void con_shutdown(struct tty_struct
*tty
)
2913 struct vc_data
*vc
= tty
->driver_data
;
2916 vc
->port
.tty
= NULL
;
2920 static int default_color
= 7; /* white */
2921 static int default_italic_color
= 2; // green (ASCII)
2922 static int default_underline_color
= 3; // cyan (ASCII)
2923 module_param_named(color
, default_color
, int, S_IRUGO
| S_IWUSR
);
2924 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2925 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2927 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2928 unsigned int cols
, int do_clear
)
2934 vc
->vc_size_row
= cols
<< 1;
2935 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2938 vc
->vc_pos
= vc
->vc_origin
;
2940 for (j
=k
=0; j
<16; j
++) {
2941 vc
->vc_palette
[k
++] = default_red
[j
] ;
2942 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2943 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2945 vc
->vc_def_color
= default_color
;
2946 vc
->vc_ulcolor
= default_underline_color
;
2947 vc
->vc_itcolor
= default_italic_color
;
2948 vc
->vc_halfcolor
= 0x08; /* grey */
2949 init_waitqueue_head(&vc
->paste_wait
);
2950 reset_terminal(vc
, do_clear
);
2954 * This routine initializes console interrupts, and does nothing
2955 * else. If you want the screen to clear, call tty_write with
2956 * the appropriate escape-sequence.
2959 static int __init
con_init(void)
2961 const char *display_desc
= NULL
;
2963 unsigned int currcons
= 0, i
;
2968 display_desc
= conswitchp
->con_startup();
2969 if (!display_desc
) {
2975 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2976 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2978 if (con_driver
->con
== NULL
) {
2979 con_driver
->con
= conswitchp
;
2980 con_driver
->desc
= display_desc
;
2981 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2982 con_driver
->first
= 0;
2983 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2988 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2989 con_driver_map
[i
] = conswitchp
;
2991 if (blankinterval
) {
2992 blank_state
= blank_normal_wait
;
2993 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
2996 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2997 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
2998 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
2999 tty_port_init(&vc
->port
);
3000 visual_init(vc
, currcons
, 1);
3001 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
3002 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
3003 currcons
|| !vc
->vc_sw
->con_save_screen
);
3005 currcons
= fg_console
= 0;
3006 master_display_fg
= vc
= vc_cons
[currcons
].d
;
3009 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
3012 pr_info("Console: %s %s %dx%d\n",
3013 vc
->vc_can_do_color
? "colour" : "mono",
3014 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
3019 #ifdef CONFIG_VT_CONSOLE
3020 register_console(&vt_console_driver
);
3024 console_initcall(con_init
);
3026 static const struct tty_operations con_ops
= {
3027 .install
= con_install
,
3031 .write_room
= con_write_room
,
3032 .put_char
= con_put_char
,
3033 .flush_chars
= con_flush_chars
,
3034 .chars_in_buffer
= con_chars_in_buffer
,
3036 #ifdef CONFIG_COMPAT
3037 .compat_ioctl
= vt_compat_ioctl
,
3041 .throttle
= con_throttle
,
3042 .unthrottle
= con_unthrottle
,
3043 .resize
= vt_resize
,
3044 .shutdown
= con_shutdown
3047 static struct cdev vc0_cdev
;
3049 static ssize_t
show_tty_active(struct device
*dev
,
3050 struct device_attribute
*attr
, char *buf
)
3052 return sprintf(buf
, "tty%d\n", fg_console
+ 1);
3054 static DEVICE_ATTR(active
, S_IRUGO
, show_tty_active
, NULL
);
3056 static struct attribute
*vt_dev_attrs
[] = {
3057 &dev_attr_active
.attr
,
3061 ATTRIBUTE_GROUPS(vt_dev
);
3063 int __init
vty_init(const struct file_operations
*console_fops
)
3065 cdev_init(&vc0_cdev
, console_fops
);
3066 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
3067 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
3068 panic("Couldn't register /dev/tty0 driver\n");
3069 tty0dev
= device_create_with_groups(tty_class
, NULL
,
3070 MKDEV(TTY_MAJOR
, 0), NULL
,
3071 vt_dev_groups
, "tty0");
3072 if (IS_ERR(tty0dev
))
3077 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
3078 if (!console_driver
)
3079 panic("Couldn't allocate console driver\n");
3081 console_driver
->name
= "tty";
3082 console_driver
->name_base
= 1;
3083 console_driver
->major
= TTY_MAJOR
;
3084 console_driver
->minor_start
= 1;
3085 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
3086 console_driver
->init_termios
= tty_std_termios
;
3088 console_driver
->init_termios
.c_iflag
|= IUTF8
;
3089 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
3090 tty_set_operations(console_driver
, &con_ops
);
3091 if (tty_register_driver(console_driver
))
3092 panic("Couldn't register console driver\n");
3095 #ifdef CONFIG_MDA_CONSOLE
3101 #ifndef VT_SINGLE_DRIVER
3103 static struct class *vtconsole_class
;
3105 static int do_bind_con_driver(const struct consw
*csw
, int first
, int last
,
3108 struct module
*owner
= csw
->owner
;
3109 const char *desc
= NULL
;
3110 struct con_driver
*con_driver
;
3111 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
3113 if (!try_module_get(owner
))
3116 WARN_CONSOLE_UNLOCKED();
3118 /* check if driver is registered */
3119 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3120 con_driver
= ®istered_con_driver
[i
];
3122 if (con_driver
->con
== csw
) {
3123 desc
= con_driver
->desc
;
3132 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
3134 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3139 module_put(conswitchp
->owner
);
3141 __module_get(owner
);
3145 first
= max(first
, con_driver
->first
);
3146 last
= min(last
, con_driver
->last
);
3148 for (i
= first
; i
<= last
; i
++) {
3150 struct vc_data
*vc
= vc_cons
[i
].d
;
3152 if (con_driver_map
[i
])
3153 module_put(con_driver_map
[i
]->owner
);
3154 __module_get(owner
);
3155 con_driver_map
[i
] = csw
;
3157 if (!vc
|| !vc
->vc_sw
)
3162 if (CON_IS_VISIBLE(vc
)) {
3167 old_was_color
= vc
->vc_can_do_color
;
3168 vc
->vc_sw
->con_deinit(vc
);
3169 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3170 visual_init(vc
, i
, 0);
3174 /* If the console changed between mono <-> color, then
3175 * the attributes in the screenbuf will be wrong. The
3176 * following resets all attributes to something sane.
3178 if (old_was_color
!= vc
->vc_can_do_color
)
3179 clear_buffer_attributes(vc
);
3182 pr_info("Console: switching ");
3184 printk("consoles %d-%d ", first
+1, last
+1);
3186 struct vc_data
*vc
= vc_cons
[j
].d
;
3188 printk("to %s %s %dx%d\n",
3189 vc
->vc_can_do_color
? "colour" : "mono",
3190 desc
, vc
->vc_cols
, vc
->vc_rows
);
3197 printk("to %s\n", desc
);
3206 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3207 /* unlocked version of unbind_con_driver() */
3208 int do_unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3210 struct module
*owner
= csw
->owner
;
3211 const struct consw
*defcsw
= NULL
;
3212 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3213 int i
, retval
= -ENODEV
;
3215 if (!try_module_get(owner
))
3218 WARN_CONSOLE_UNLOCKED();
3220 /* check if driver is registered and if it is unbindable */
3221 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3222 con_driver
= ®istered_con_driver
[i
];
3224 if (con_driver
->con
== csw
&&
3225 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3236 /* check if backup driver exists */
3237 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3238 con_back
= ®istered_con_driver
[i
];
3240 if (con_back
->con
&& con_back
->con
!= csw
) {
3241 defcsw
= con_back
->con
;
3250 if (!con_is_bound(csw
))
3253 first
= max(first
, con_driver
->first
);
3254 last
= min(last
, con_driver
->last
);
3256 for (i
= first
; i
<= last
; i
++) {
3257 if (con_driver_map
[i
] == csw
) {
3258 module_put(csw
->owner
);
3259 con_driver_map
[i
] = NULL
;
3263 if (!con_is_bound(defcsw
)) {
3264 const struct consw
*defconsw
= conswitchp
;
3266 defcsw
->con_startup();
3267 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3269 * vgacon may change the default driver to point
3270 * to dummycon, we restore it here...
3272 conswitchp
= defconsw
;
3275 if (!con_is_bound(csw
))
3276 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3278 /* ignore return value, binding should not fail */
3279 do_bind_con_driver(defcsw
, first
, last
, deflt
);
3285 EXPORT_SYMBOL_GPL(do_unbind_con_driver
);
3287 static int vt_bind(struct con_driver
*con
)
3289 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3290 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3292 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3297 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3298 struct con_driver
*con
= ®istered_con_driver
[i
];
3300 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3312 for (i
= con
->first
; i
<= con
->last
; i
++) {
3313 if (con_driver_map
[i
] == defcsw
) {
3318 } else if (first
!= -1)
3322 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3326 do_bind_con_driver(csw
, first
, last
, deflt
);
3337 static int vt_unbind(struct con_driver
*con
)
3339 const struct consw
*csw
= NULL
;
3340 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3343 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3351 for (i
= con
->first
; i
<= con
->last
; i
++) {
3352 if (con_driver_map
[i
] == csw
) {
3357 } else if (first
!= -1)
3361 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3365 ret
= do_unbind_con_driver(csw
, first
, last
, deflt
);
3379 static inline int vt_bind(struct con_driver
*con
)
3383 static inline int vt_unbind(struct con_driver
*con
)
3387 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3389 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3390 const char *buf
, size_t count
)
3392 struct con_driver
*con
= dev_get_drvdata(dev
);
3393 int bind
= simple_strtoul(buf
, NULL
, 0);
3407 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3410 struct con_driver
*con
= dev_get_drvdata(dev
);
3411 int bind
= con_is_bound(con
->con
);
3413 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3416 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3419 struct con_driver
*con
= dev_get_drvdata(dev
);
3421 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3422 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3427 static DEVICE_ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
);
3428 static DEVICE_ATTR(name
, S_IRUGO
, show_name
, NULL
);
3430 static struct attribute
*con_dev_attrs
[] = {
3431 &dev_attr_bind
.attr
,
3432 &dev_attr_name
.attr
,
3436 ATTRIBUTE_GROUPS(con_dev
);
3438 static int vtconsole_init_device(struct con_driver
*con
)
3440 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3444 static void vtconsole_deinit_device(struct con_driver
*con
)
3446 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3450 * con_is_bound - checks if driver is bound to the console
3451 * @csw: console driver
3453 * RETURNS: zero if unbound, nonzero if bound
3455 * Drivers can call this and if zero, they should release
3456 * all resources allocated on con_startup()
3458 int con_is_bound(const struct consw
*csw
)
3462 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3463 if (con_driver_map
[i
] == csw
) {
3471 EXPORT_SYMBOL(con_is_bound
);
3474 * con_debug_enter - prepare the console for the kernel debugger
3475 * @sw: console driver
3477 * Called when the console is taken over by the kernel debugger, this
3478 * function needs to save the current console state, then put the console
3479 * into a state suitable for the kernel debugger.
3482 * Zero on success, nonzero if a failure occurred when trying to prepare
3483 * the console for the debugger.
3485 int con_debug_enter(struct vc_data
*vc
)
3489 saved_fg_console
= fg_console
;
3490 saved_last_console
= last_console
;
3491 saved_want_console
= want_console
;
3492 saved_vc_mode
= vc
->vc_mode
;
3493 saved_console_blanked
= console_blanked
;
3494 vc
->vc_mode
= KD_TEXT
;
3495 console_blanked
= 0;
3496 if (vc
->vc_sw
->con_debug_enter
)
3497 ret
= vc
->vc_sw
->con_debug_enter(vc
);
3498 #ifdef CONFIG_KGDB_KDB
3499 /* Set the initial LINES variable if it is not already set */
3500 if (vc
->vc_rows
< 999) {
3503 const char *setargs
[3] = {
3508 if (kdbgetintenv(setargs
[0], &linecount
)) {
3509 snprintf(lns
, 4, "%i", vc
->vc_rows
);
3510 kdb_set(2, setargs
);
3513 if (vc
->vc_cols
< 999) {
3516 const char *setargs
[3] = {
3521 if (kdbgetintenv(setargs
[0], &colcount
)) {
3522 snprintf(cols
, 4, "%i", vc
->vc_cols
);
3523 kdb_set(2, setargs
);
3526 #endif /* CONFIG_KGDB_KDB */
3529 EXPORT_SYMBOL_GPL(con_debug_enter
);
3532 * con_debug_leave - restore console state
3533 * @sw: console driver
3535 * Restore the console state to what it was before the kernel debugger
3539 * Zero on success, nonzero if a failure occurred when trying to restore
3542 int con_debug_leave(void)
3547 fg_console
= saved_fg_console
;
3548 last_console
= saved_last_console
;
3549 want_console
= saved_want_console
;
3550 console_blanked
= saved_console_blanked
;
3551 vc_cons
[fg_console
].d
->vc_mode
= saved_vc_mode
;
3553 vc
= vc_cons
[fg_console
].d
;
3554 if (vc
->vc_sw
->con_debug_leave
)
3555 ret
= vc
->vc_sw
->con_debug_leave(vc
);
3558 EXPORT_SYMBOL_GPL(con_debug_leave
);
3560 static int do_register_con_driver(const struct consw
*csw
, int first
, int last
)
3562 struct module
*owner
= csw
->owner
;
3563 struct con_driver
*con_driver
;
3567 WARN_CONSOLE_UNLOCKED();
3569 if (!try_module_get(owner
))
3572 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3573 con_driver
= ®istered_con_driver
[i
];
3575 /* already registered */
3576 if (con_driver
->con
== csw
)
3583 desc
= csw
->con_startup();
3590 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3591 con_driver
= ®istered_con_driver
[i
];
3593 if (con_driver
->con
== NULL
&&
3594 !(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
)) {
3595 con_driver
->con
= csw
;
3596 con_driver
->desc
= desc
;
3597 con_driver
->node
= i
;
3598 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3599 CON_DRIVER_FLAG_INIT
;
3600 con_driver
->first
= first
;
3601 con_driver
->last
= last
;
3611 device_create_with_groups(vtconsole_class
, NULL
,
3612 MKDEV(0, con_driver
->node
),
3613 con_driver
, con_dev_groups
,
3614 "vtcon%i", con_driver
->node
);
3615 if (IS_ERR(con_driver
->dev
)) {
3616 printk(KERN_WARNING
"Unable to create device for %s; "
3617 "errno = %ld\n", con_driver
->desc
,
3618 PTR_ERR(con_driver
->dev
));
3619 con_driver
->dev
= NULL
;
3621 vtconsole_init_device(con_driver
);
3631 * do_unregister_con_driver - unregister console driver from console layer
3632 * @csw: console driver
3634 * DESCRIPTION: All drivers that registers to the console layer must
3635 * call this function upon exit, or if the console driver is in a state
3636 * where it won't be able to handle console services, such as the
3637 * framebuffer console without loaded framebuffer drivers.
3639 * The driver must unbind first prior to unregistration.
3641 int do_unregister_con_driver(const struct consw
*csw
)
3645 /* cannot unregister a bound driver */
3646 if (con_is_bound(csw
))
3649 if (csw
== conswitchp
)
3652 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3653 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3655 if (con_driver
->con
== csw
) {
3657 * Defer the removal of the sysfs entries since that
3658 * will acquire the kernfs s_active lock and we can't
3659 * acquire this lock while holding the console lock:
3660 * the unbind sysfs entry imposes already the opposite
3661 * order. Reset con already here to prevent any later
3662 * lookup to succeed and mark this slot as zombie, so
3663 * it won't get reused until we complete the removal
3664 * in the deferred work.
3666 con_driver
->con
= NULL
;
3667 con_driver
->flag
= CON_DRIVER_FLAG_ZOMBIE
;
3668 schedule_work(&con_driver_unregister_work
);
3676 EXPORT_SYMBOL_GPL(do_unregister_con_driver
);
3678 static void con_driver_unregister_callback(struct work_struct
*ignored
)
3684 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3685 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3687 if (!(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
))
3692 vtconsole_deinit_device(con_driver
);
3693 device_destroy(vtconsole_class
, MKDEV(0, con_driver
->node
));
3697 if (WARN_ON_ONCE(con_driver
->con
))
3698 con_driver
->con
= NULL
;
3699 con_driver
->desc
= NULL
;
3700 con_driver
->dev
= NULL
;
3701 con_driver
->node
= 0;
3702 WARN_ON_ONCE(con_driver
->flag
!= CON_DRIVER_FLAG_ZOMBIE
);
3703 con_driver
->flag
= 0;
3704 con_driver
->first
= 0;
3705 con_driver
->last
= 0;
3712 * If we support more console drivers, this function is used
3713 * when a driver wants to take over some existing consoles
3714 * and become default driver for newly opened ones.
3716 * do_take_over_console is basically a register followed by unbind
3718 int do_take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3722 err
= do_register_con_driver(csw
, first
, last
);
3724 * If we get an busy error we still want to bind the console driver
3725 * and return success, as we may have unbound the console driver
3726 * but not unregistered it.
3731 do_bind_con_driver(csw
, first
, last
, deflt
);
3735 EXPORT_SYMBOL_GPL(do_take_over_console
);
3739 * give_up_console is a wrapper to unregister_con_driver. It will only
3740 * work if driver is fully unbound.
3742 void give_up_console(const struct consw
*csw
)
3745 do_unregister_con_driver(csw
);
3749 static int __init
vtconsole_class_init(void)
3753 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3754 if (IS_ERR(vtconsole_class
)) {
3755 printk(KERN_WARNING
"Unable to create vt console class; "
3756 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3757 vtconsole_class
= NULL
;
3760 /* Add system drivers to sysfs */
3761 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3762 struct con_driver
*con
= ®istered_con_driver
[i
];
3764 if (con
->con
&& !con
->dev
) {
3766 device_create_with_groups(vtconsole_class
, NULL
,
3767 MKDEV(0, con
->node
),
3768 con
, con_dev_groups
,
3769 "vtcon%i", con
->node
);
3771 if (IS_ERR(con
->dev
)) {
3772 printk(KERN_WARNING
"Unable to create "
3773 "device for %s; errno = %ld\n",
3774 con
->desc
, PTR_ERR(con
->dev
));
3777 vtconsole_init_device(con
);
3784 postcore_initcall(vtconsole_class_init
);
3792 static int set_vesa_blanking(char __user
*p
)
3796 if (get_user(mode
, p
+ 1))
3799 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3803 void do_blank_screen(int entering_gfx
)
3805 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3808 WARN_CONSOLE_UNLOCKED();
3810 if (console_blanked
) {
3811 if (blank_state
== blank_vesa_wait
) {
3812 blank_state
= blank_off
;
3813 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3818 /* entering graphics mode? */
3822 vc
->vc_sw
->con_blank(vc
, -1, 1);
3823 console_blanked
= fg_console
+ 1;
3824 blank_state
= blank_off
;
3829 if (blank_state
!= blank_normal_wait
)
3831 blank_state
= blank_off
;
3833 /* don't blank graphics */
3834 if (vc
->vc_mode
!= KD_TEXT
) {
3835 console_blanked
= fg_console
+ 1;
3840 del_timer_sync(&console_timer
);
3841 blank_timer_expired
= 0;
3844 /* In case we need to reset origin, blanking hook returns 1 */
3845 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3846 console_blanked
= fg_console
+ 1;
3850 if (console_blank_hook
&& console_blank_hook(1))
3853 if (vesa_off_interval
&& vesa_blank_mode
) {
3854 blank_state
= blank_vesa_wait
;
3855 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3857 vt_event_post(VT_EVENT_BLANK
, vc
->vc_num
, vc
->vc_num
);
3859 EXPORT_SYMBOL(do_blank_screen
);
3862 * Called by timer as well as from vt_console_driver
3864 void do_unblank_screen(int leaving_gfx
)
3868 /* This should now always be called from a "sane" (read: can schedule)
3869 * context for the sake of the low level drivers, except in the special
3870 * case of oops_in_progress
3872 if (!oops_in_progress
)
3875 WARN_CONSOLE_UNLOCKED();
3878 if (!console_blanked
)
3880 if (!vc_cons_allocated(fg_console
)) {
3882 pr_warn("unblank_screen: tty %d not allocated ??\n",
3886 vc
= vc_cons
[fg_console
].d
;
3887 /* Try to unblank in oops case too */
3888 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
3889 return; /* but leave console_blanked != 0 */
3891 if (blankinterval
) {
3892 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3893 blank_state
= blank_normal_wait
;
3896 console_blanked
= 0;
3897 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
) || vt_force_oops_output(vc
))
3898 /* Low-level driver cannot restore -> do it ourselves */
3900 if (console_blank_hook
)
3901 console_blank_hook(0);
3904 vt_event_post(VT_EVENT_UNBLANK
, vc
->vc_num
, vc
->vc_num
);
3906 EXPORT_SYMBOL(do_unblank_screen
);
3909 * This is called by the outside world to cause a forced unblank, mostly for
3910 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3911 * call it with 1 as an argument and so force a mode restore... that may kill
3912 * X or at least garbage the screen but would also make the Oops visible...
3914 void unblank_screen(void)
3916 do_unblank_screen(0);
3920 * We defer the timer blanking to work queue so it can take the console mutex
3921 * (console operations can still happen at irq time, but only from printk which
3922 * has the console mutex. Not perfect yet, but better than no locking
3924 static void blank_screen_t(unsigned long dummy
)
3926 if (unlikely(!keventd_up())) {
3927 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3930 blank_timer_expired
= 1;
3931 schedule_work(&console_work
);
3934 void poke_blanked_console(void)
3936 WARN_CONSOLE_UNLOCKED();
3938 /* Add this so we quickly catch whoever might call us in a non
3939 * safe context. Nowadays, unblank_screen() isn't to be called in
3940 * atomic contexts and is allowed to schedule (with the special case
3941 * of oops_in_progress, but that isn't of any concern for this
3946 /* This isn't perfectly race free, but a race here would be mostly harmless,
3947 * at worse, we'll do a spurrious blank and it's unlikely
3949 del_timer(&console_timer
);
3950 blank_timer_expired
= 0;
3952 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3954 if (console_blanked
)
3956 else if (blankinterval
) {
3957 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3958 blank_state
= blank_normal_wait
;
3966 static void set_palette(struct vc_data
*vc
)
3968 WARN_CONSOLE_UNLOCKED();
3970 if (vc
->vc_mode
!= KD_GRAPHICS
)
3971 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3975 * Load palette into the DAC registers. arg points to a colour
3976 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3979 int con_set_cmap(unsigned char __user
*arg
)
3982 unsigned char colormap
[3*16];
3984 if (copy_from_user(colormap
, arg
, sizeof(colormap
)))
3988 for (i
= k
= 0; i
< 16; i
++) {
3989 default_red
[i
] = colormap
[k
++];
3990 default_grn
[i
] = colormap
[k
++];
3991 default_blu
[i
] = colormap
[k
++];
3993 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3994 if (!vc_cons_allocated(i
))
3996 for (j
= k
= 0; j
< 16; j
++) {
3997 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
3998 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
3999 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
4001 set_palette(vc_cons
[i
].d
);
4008 int con_get_cmap(unsigned char __user
*arg
)
4011 unsigned char colormap
[3*16];
4014 for (i
= k
= 0; i
< 16; i
++) {
4015 colormap
[k
++] = default_red
[i
];
4016 colormap
[k
++] = default_grn
[i
];
4017 colormap
[k
++] = default_blu
[i
];
4021 if (copy_to_user(arg
, colormap
, sizeof(colormap
)))
4027 void reset_palette(struct vc_data
*vc
)
4030 for (j
=k
=0; j
<16; j
++) {
4031 vc
->vc_palette
[k
++] = default_red
[j
];
4032 vc
->vc_palette
[k
++] = default_grn
[j
];
4033 vc
->vc_palette
[k
++] = default_blu
[j
];
4041 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4042 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4043 * depending on width) reserved for each character which is kinda wasty, but
4044 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4045 * is up to the actual low-level console-driver convert data into its favorite
4046 * format (maybe we should add a `fontoffset' field to the `display'
4047 * structure so we won't have to convert the fontdata all the time.
4051 #define max_font_size 65536
4053 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
4055 struct console_font font
;
4060 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
4067 if (vc
->vc_mode
!= KD_TEXT
)
4069 else if (vc
->vc_sw
->con_font_get
)
4070 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
4078 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
4080 if (op
->data
&& font
.charcount
> op
->charcount
)
4082 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
4083 if (font
.width
> op
->width
|| font
.height
> op
->height
)
4086 if (font
.width
!= 8)
4088 else if ((op
->height
&& font
.height
> op
->height
) ||
4095 op
->height
= font
.height
;
4096 op
->width
= font
.width
;
4097 op
->charcount
= font
.charcount
;
4099 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
4107 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
4109 struct console_font font
;
4113 if (vc
->vc_mode
!= KD_TEXT
)
4117 if (op
->charcount
> 512)
4119 if (!op
->height
) { /* Need to guess font height [compat] */
4121 u8 __user
*charmap
= op
->data
;
4124 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4125 so that we can get rid of this soon */
4126 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
4128 for (h
= 32; h
> 0; h
--)
4129 for (i
= 0; i
< op
->charcount
; i
++) {
4130 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
4139 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
4141 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
4142 if (size
> max_font_size
)
4144 font
.charcount
= op
->charcount
;
4145 font
.height
= op
->height
;
4146 font
.width
= op
->width
;
4147 font
.data
= memdup_user(op
->data
, size
);
4148 if (IS_ERR(font
.data
))
4149 return PTR_ERR(font
.data
);
4151 if (vc
->vc_mode
!= KD_TEXT
)
4153 else if (vc
->vc_sw
->con_font_set
)
4154 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
4162 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
4164 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
4165 char name
[MAX_FONT_NAME
];
4172 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
4175 name
[MAX_FONT_NAME
- 1] = 0;
4178 if (vc
->vc_mode
!= KD_TEXT
) {
4182 if (vc
->vc_sw
->con_font_default
)
4183 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
4188 op
->width
= font
.width
;
4189 op
->height
= font
.height
;
4194 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
4196 int con
= op
->height
;
4201 if (vc
->vc_mode
!= KD_TEXT
)
4203 else if (!vc
->vc_sw
->con_font_copy
)
4205 else if (con
< 0 || !vc_cons_allocated(con
))
4207 else if (con
== vc
->vc_num
) /* nothing to do */
4210 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4215 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4218 case KD_FONT_OP_SET
:
4219 return con_font_set(vc
, op
);
4220 case KD_FONT_OP_GET
:
4221 return con_font_get(vc
, op
);
4222 case KD_FONT_OP_SET_DEFAULT
:
4223 return con_font_default(vc
, op
);
4224 case KD_FONT_OP_COPY
:
4225 return con_font_copy(vc
, op
);
4231 * Interface exported to selection and vcs.
4234 /* used by selection */
4235 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4237 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4240 if (w
& vc
->vc_hi_font_mask
)
4244 EXPORT_SYMBOL_GPL(screen_glyph
);
4246 /* used by vcs - note the word offset */
4247 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4249 return screenpos(vc
, 2 * w_offset
, viewed
);
4252 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4258 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4261 gotoxy(vc
, p
[0], p
[1]);
4265 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4267 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4268 return softcursor_original
;
4269 return scr_readw(org
);
4272 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4274 scr_writew(val
, org
);
4275 if ((unsigned long)org
== vc
->vc_pos
) {
4276 softcursor_original
= -1;
4281 void vcs_scr_updated(struct vc_data
*vc
)
4287 * Visible symbols for modules
4290 EXPORT_SYMBOL(color_table
);
4291 EXPORT_SYMBOL(default_red
);
4292 EXPORT_SYMBOL(default_grn
);
4293 EXPORT_SYMBOL(default_blu
);
4294 EXPORT_SYMBOL(update_region
);
4295 EXPORT_SYMBOL(redraw_screen
);
4296 EXPORT_SYMBOL(vc_resize
);
4297 EXPORT_SYMBOL(fg_console
);
4298 EXPORT_SYMBOL(console_blank_hook
);
4299 EXPORT_SYMBOL(console_blanked
);
4300 EXPORT_SYMBOL(vc_cons
);
4301 EXPORT_SYMBOL(global_cursor_default
);
4302 #ifndef VT_SINGLE_DRIVER
4303 EXPORT_SYMBOL(give_up_console
);