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 if (vc
->vc_uni_pagedir_loc
)
747 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
748 vc
->vc_uni_pagedir
= NULL
;
749 vc
->vc_hi_font_mask
= 0;
750 vc
->vc_complement_mask
= 0;
751 vc
->vc_can_do_color
= 0;
752 vc
->vc_panic_force_write
= false;
753 vc
->vc_sw
->con_init(vc
, init
);
754 if (!vc
->vc_complement_mask
)
755 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
756 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
757 vc
->vc_size_row
= vc
->vc_cols
<< 1;
758 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
761 int vc_allocate(unsigned int currcons
) /* return 0 on success */
763 WARN_CONSOLE_UNLOCKED();
765 if (currcons
>= MAX_NR_CONSOLES
)
767 if (!vc_cons
[currcons
].d
) {
769 struct vt_notifier_param param
;
771 /* prevent users from taking too much memory */
772 if (currcons
>= MAX_NR_USER_CONSOLES
&& !capable(CAP_SYS_RESOURCE
))
775 /* due to the granularity of kmalloc, we waste some memory here */
776 /* the alloc is done in two steps, to optimize the common situation
777 of a 25x80 console (structsize=216, screenbuf_size=4000) */
778 /* although the numbers above are not valid since long ago, the
779 point is still up-to-date and the comment still has its value
780 even if only as a historical artifact. --mj, July 1998 */
781 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
784 vc_cons
[currcons
].d
= vc
;
785 tty_port_init(&vc
->port
);
786 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
787 visual_init(vc
, currcons
, 1);
788 if (!*vc
->vc_uni_pagedir_loc
)
789 con_set_default_unimap(vc
);
790 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
791 if (!vc
->vc_screenbuf
) {
793 vc_cons
[currcons
].d
= NULL
;
797 /* If no drivers have overridden us and the user didn't pass a
798 boot option, default to displaying the cursor */
799 if (global_cursor_default
== -1)
800 global_cursor_default
= 1;
802 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
803 vcs_make_sysfs(currcons
);
804 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
809 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
812 /* Resizes the resolution of the display adapater */
815 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
816 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
822 * Change # of rows and columns (0 means unchanged/the size of fg_console)
823 * [this is to be used together with some user program
824 * like resize that changes the hardware videomode]
826 #define VC_RESIZE_MAXCOL (32767)
827 #define VC_RESIZE_MAXROW (32767)
830 * vc_do_resize - resizing method for the tty
831 * @tty: tty being resized
832 * @real_tty: real tty (different to tty if a pty/tty pair)
833 * @vc: virtual console private data
837 * Resize a virtual console, clipping according to the actual constraints.
838 * If the caller passes a tty structure then update the termios winsize
839 * information and perform any necessary signal handling.
841 * Caller must hold the console semaphore. Takes the termios rwsem and
842 * ctrl_lock of the tty IFF a tty is passed.
845 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
846 unsigned int cols
, unsigned int lines
)
848 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
850 unsigned int old_rows
, old_row_size
;
851 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
853 unsigned short *newscreen
;
855 WARN_CONSOLE_UNLOCKED();
860 user
= vc
->vc_resize_user
;
861 vc
->vc_resize_user
= 0;
863 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
866 new_cols
= (cols
? cols
: vc
->vc_cols
);
867 new_rows
= (lines
? lines
: vc
->vc_rows
);
868 new_row_size
= new_cols
<< 1;
869 new_screen_size
= new_row_size
* new_rows
;
871 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
874 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
878 old_rows
= vc
->vc_rows
;
879 old_row_size
= vc
->vc_size_row
;
881 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
887 vc
->vc_rows
= new_rows
;
888 vc
->vc_cols
= new_cols
;
889 vc
->vc_size_row
= new_row_size
;
890 vc
->vc_screenbuf_size
= new_screen_size
;
892 rlth
= min(old_row_size
, new_row_size
);
893 rrem
= new_row_size
- rlth
;
894 old_origin
= vc
->vc_origin
;
895 new_origin
= (long) newscreen
;
896 new_scr_end
= new_origin
+ new_screen_size
;
898 if (vc
->vc_y
> new_rows
) {
899 if (old_rows
- vc
->vc_y
< new_rows
) {
901 * Cursor near the bottom, copy contents from the
904 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
907 * Cursor is in no man's land, copy 1/2 screenful
908 * from the top and bottom of cursor position
910 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
914 end
= old_origin
+ old_row_size
* min(old_rows
, new_rows
);
918 while (old_origin
< end
) {
919 scr_memcpyw((unsigned short *) new_origin
,
920 (unsigned short *) old_origin
, rlth
);
922 scr_memsetw((void *)(new_origin
+ rlth
),
923 vc
->vc_video_erase_char
, rrem
);
924 old_origin
+= old_row_size
;
925 new_origin
+= new_row_size
;
927 if (new_scr_end
> new_origin
)
928 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
929 new_scr_end
- new_origin
);
930 kfree(vc
->vc_screenbuf
);
931 vc
->vc_screenbuf
= newscreen
;
932 vc
->vc_screenbuf_size
= new_screen_size
;
935 /* do part of a reset_terminal() */
937 vc
->vc_bottom
= vc
->vc_rows
;
938 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
942 /* Rewrite the requested winsize data with the actual
945 memset(&ws
, 0, sizeof(ws
));
946 ws
.ws_row
= vc
->vc_rows
;
947 ws
.ws_col
= vc
->vc_cols
;
948 ws
.ws_ypixel
= vc
->vc_scan_lines
;
949 tty_do_resize(tty
, &ws
);
952 if (CON_IS_VISIBLE(vc
))
954 vt_event_post(VT_EVENT_RESIZE
, vc
->vc_num
, vc
->vc_num
);
959 * vc_resize - resize a VT
960 * @vc: virtual console
964 * Resize a virtual console as seen from the console end of things. We
965 * use the common vc_do_resize methods to update the structures. The
966 * caller must hold the console sem to protect console internals and
970 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
972 return vc_do_resize(vc
->port
.tty
, vc
, cols
, rows
);
976 * vt_resize - resize a VT
977 * @tty: tty to resize
978 * @ws: winsize attributes
980 * Resize a virtual terminal. This is called by the tty layer as we
981 * register our own handler for resizing. The mutual helper does all
984 * Takes the console sem and the called methods then take the tty
985 * termios_rwsem and the tty ctrl_lock in that order.
987 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
989 struct vc_data
*vc
= tty
->driver_data
;
993 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
998 struct vc_data
*vc_deallocate(unsigned int currcons
)
1000 struct vc_data
*vc
= NULL
;
1002 WARN_CONSOLE_UNLOCKED();
1004 if (vc_cons_allocated(currcons
)) {
1005 struct vt_notifier_param param
;
1007 param
.vc
= vc
= vc_cons
[currcons
].d
;
1008 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
1009 vcs_remove_sysfs(currcons
);
1010 vc
->vc_sw
->con_deinit(vc
);
1011 put_pid(vc
->vt_pid
);
1012 module_put(vc
->vc_sw
->owner
);
1013 kfree(vc
->vc_screenbuf
);
1014 vc_cons
[currcons
].d
= NULL
;
1023 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1024 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1025 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1027 #define decarm VC_REPEAT
1028 #define decckm VC_CKMODE
1029 #define kbdapplic VC_APPLIC
1033 * this is what the terminal answers to a ESC-Z or csi0c query.
1035 #define VT100ID "\033[?1;2c"
1036 #define VT102ID "\033[?6c"
1038 unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1039 8,12,10,14, 9,13,11,15 };
1041 /* the default colour table, for VGA+ colour systems */
1042 int default_red
[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1043 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1044 int default_grn
[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1045 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1046 int default_blu
[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1047 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1049 module_param_array(default_red
, int, NULL
, S_IRUGO
| S_IWUSR
);
1050 module_param_array(default_grn
, int, NULL
, S_IRUGO
| S_IWUSR
);
1051 module_param_array(default_blu
, int, NULL
, S_IRUGO
| S_IWUSR
);
1054 * gotoxy() must verify all boundaries, because the arguments
1055 * might also be negative. If the given position is out of
1056 * bounds, the cursor is placed at the nearest margin.
1058 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1065 if (new_x
>= vc
->vc_cols
)
1066 vc
->vc_x
= vc
->vc_cols
- 1;
1073 max_y
= vc
->vc_bottom
;
1076 max_y
= vc
->vc_rows
;
1080 else if (new_y
>= max_y
)
1081 vc
->vc_y
= max_y
- 1;
1084 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1085 vc
->vc_need_wrap
= 0;
1088 /* for absolute user moves, when decom is set */
1089 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1091 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1094 void scrollback(struct vc_data
*vc
, int lines
)
1097 lines
= vc
->vc_rows
/ 2;
1098 scrolldelta(-lines
);
1101 void scrollfront(struct vc_data
*vc
, int lines
)
1104 lines
= vc
->vc_rows
/ 2;
1108 static void lf(struct vc_data
*vc
)
1110 /* don't scroll if above bottom of scrolling region, or
1111 * if below scrolling region
1113 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1114 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1115 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1117 vc
->vc_pos
+= vc
->vc_size_row
;
1119 vc
->vc_need_wrap
= 0;
1120 notify_write(vc
, '\n');
1123 static void ri(struct vc_data
*vc
)
1125 /* don't scroll if below top of scrolling region, or
1126 * if above scrolling region
1128 if (vc
->vc_y
== vc
->vc_top
)
1129 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1130 else if (vc
->vc_y
> 0) {
1132 vc
->vc_pos
-= vc
->vc_size_row
;
1134 vc
->vc_need_wrap
= 0;
1137 static inline void cr(struct vc_data
*vc
)
1139 vc
->vc_pos
-= vc
->vc_x
<< 1;
1140 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1141 notify_write(vc
, '\r');
1144 static inline void bs(struct vc_data
*vc
)
1149 vc
->vc_need_wrap
= 0;
1150 notify_write(vc
, '\b');
1154 static inline void del(struct vc_data
*vc
)
1159 static void csi_J(struct vc_data
*vc
, int vpar
)
1162 unsigned short * start
;
1165 case 0: /* erase from cursor to end of display */
1166 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1167 start
= (unsigned short *)vc
->vc_pos
;
1169 case 1: /* erase from start to cursor */
1170 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1171 start
= (unsigned short *)vc
->vc_origin
;
1173 case 3: /* erase scroll-back buffer (and whole display) */
1174 scr_memsetw(vc
->vc_screenbuf
, vc
->vc_video_erase_char
,
1175 vc
->vc_screenbuf_size
>> 1);
1177 if (CON_IS_VISIBLE(vc
))
1180 case 2: /* erase whole display */
1181 count
= vc
->vc_cols
* vc
->vc_rows
;
1182 start
= (unsigned short *)vc
->vc_origin
;
1187 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1189 do_update_region(vc
, (unsigned long) start
, count
);
1190 vc
->vc_need_wrap
= 0;
1193 static void csi_K(struct vc_data
*vc
, int vpar
)
1196 unsigned short * start
;
1199 case 0: /* erase from cursor to end of line */
1200 count
= vc
->vc_cols
- vc
->vc_x
;
1201 start
= (unsigned short *)vc
->vc_pos
;
1203 case 1: /* erase from start of line to cursor */
1204 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1205 count
= vc
->vc_x
+ 1;
1207 case 2: /* erase whole line */
1208 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1209 count
= vc
->vc_cols
;
1214 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1215 vc
->vc_need_wrap
= 0;
1217 do_update_region(vc
, (unsigned long) start
, count
);
1220 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1226 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1228 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1230 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1231 vc
->vc_need_wrap
= 0;
1234 static void default_attr(struct vc_data
*vc
)
1236 vc
->vc_intensity
= 1;
1238 vc
->vc_underline
= 0;
1241 vc
->vc_color
= vc
->vc_def_color
;
1244 struct rgb
{ u8 r
; u8 g
; u8 b
; };
1246 static struct rgb
rgb_from_256(int i
)
1249 if (i
< 8) { /* Standard colours. */
1250 c
.r
= i
&1 ? 0xaa : 0x00;
1251 c
.g
= i
&2 ? 0xaa : 0x00;
1252 c
.b
= i
&4 ? 0xaa : 0x00;
1253 } else if (i
< 16) {
1254 c
.r
= i
&1 ? 0xff : 0x55;
1255 c
.g
= i
&2 ? 0xff : 0x55;
1256 c
.b
= i
&4 ? 0xff : 0x55;
1257 } else if (i
< 232) { /* 6x6x6 colour cube. */
1258 c
.r
= (i
- 16) / 36 * 85 / 2;
1259 c
.g
= (i
- 16) / 6 % 6 * 85 / 2;
1260 c
.b
= (i
- 16) % 6 * 85 / 2;
1261 } else /* Grayscale ramp. */
1262 c
.r
= c
.g
= c
.b
= i
* 10 - 2312;
1266 static void rgb_foreground(struct vc_data
*vc
, struct rgb c
)
1273 hue
= (c
.r
> max
/2 ? 4 : 0)
1274 | (c
.g
> max
/2 ? 2 : 0)
1275 | (c
.b
> max
/2 ? 1 : 0);
1276 if (hue
== 7 && max
<= 0x55)
1277 hue
= 0, vc
->vc_intensity
= 2;
1279 vc
->vc_intensity
= (max
> 0xaa) + 1;
1280 vc
->vc_color
= (vc
->vc_color
& 0xf0) | hue
;
1283 static void rgb_background(struct vc_data
*vc
, struct rgb c
)
1285 /* For backgrounds, err on the dark side. */
1286 vc
->vc_color
= (vc
->vc_color
& 0x0f)
1287 | (c
.r
&0x80) >> 1 | (c
.g
&0x80) >> 2 | (c
.b
&0x80) >> 3;
1290 /* console_lock is held */
1291 static void csi_m(struct vc_data
*vc
)
1295 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1296 switch (vc
->vc_par
[i
]) {
1297 case 0: /* all attributes off */
1301 vc
->vc_intensity
= 2;
1304 vc
->vc_intensity
= 0;
1310 vc
->vc_underline
= 1;
1318 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1319 * Select primary font, don't display
1320 * control chars if defined, don't set
1323 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1325 : vc
->vc_G1_charset
, vc
);
1326 vc
->vc_disp_ctrl
= 0;
1327 vc
->vc_toggle_meta
= 0;
1329 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1330 * Select first alternate font, lets
1331 * chars < 32 be displayed as ROM chars.
1333 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1334 vc
->vc_disp_ctrl
= 1;
1335 vc
->vc_toggle_meta
= 0;
1337 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1338 * Select second alternate font, toggle
1339 * high bit before displaying as ROM char.
1341 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1342 vc
->vc_disp_ctrl
= 1;
1343 vc
->vc_toggle_meta
= 1;
1347 vc
->vc_intensity
= 1;
1353 vc
->vc_underline
= 0;
1361 case 38: /* ITU T.416
1362 * Higher colour modes.
1363 * They break the usual properties of SGR codes
1364 * and thus need to be detected and ignored by
1365 * hand. Strictly speaking, that standard also
1366 * wants : rather than ; as separators, contrary
1367 * to ECMA-48, but no one produces such codes
1368 * and almost no one accepts them.
1371 if (i
> vc
->vc_npar
)
1373 if (vc
->vc_par
[i
] == 5 && /* 256 colours */
1374 i
< vc
->vc_npar
) { /* ubiquitous */
1377 rgb_from_256(vc
->vc_par
[i
]));
1378 } else if (vc
->vc_par
[i
] == 2 && /* 24 bit */
1379 i
<= vc
->vc_npar
+ 3) {/* extremely rare */
1381 .r
= vc
->vc_par
[i
+ 1],
1382 .g
= vc
->vc_par
[i
+ 2],
1383 .b
= vc
->vc_par
[i
+ 3],
1385 rgb_foreground(vc
, c
);
1388 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane
1389 * there's no point in supporting them.
1394 if (i
> vc
->vc_npar
)
1396 if (vc
->vc_par
[i
] == 5 && /* 256 colours */
1400 rgb_from_256(vc
->vc_par
[i
]));
1401 } else if (vc
->vc_par
[i
] == 2 && /* 24 bit */
1402 i
<= vc
->vc_npar
+ 3) {
1404 .r
= vc
->vc_par
[i
+ 1],
1405 .g
= vc
->vc_par
[i
+ 2],
1406 .b
= vc
->vc_par
[i
+ 3],
1408 rgb_background(vc
, c
);
1413 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) | (vc
->vc_color
& 0xf0);
1416 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) | (vc
->vc_color
& 0x0f);
1419 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1420 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1421 | (vc
->vc_color
& 0xf0);
1422 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1423 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1424 | (vc
->vc_color
& 0x0f);
1430 static void respond_string(const char *p
, struct tty_port
*port
)
1433 tty_insert_flip_char(port
, *p
, 0);
1436 tty_schedule_flip(port
);
1439 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1443 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1444 respond_string(buf
, tty
->port
);
1447 static inline void status_report(struct tty_struct
*tty
)
1449 respond_string("\033[0n", tty
->port
); /* Terminal ok */
1452 static inline void respond_ID(struct tty_struct
*tty
)
1454 respond_string(VT102ID
, tty
->port
);
1457 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1461 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1463 respond_string(buf
, tty
->port
);
1466 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1467 int mouse_reporting(void)
1469 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1472 /* console_lock is held */
1473 static void set_mode(struct vc_data
*vc
, int on_off
)
1477 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1479 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1480 case 1: /* Cursor keys send ^[Ox/^[[x */
1482 set_kbd(vc
, decckm
);
1484 clr_kbd(vc
, decckm
);
1486 case 3: /* 80/132 mode switch unimplemented */
1487 vc
->vc_deccolm
= on_off
;
1489 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1490 /* this alone does not suffice; some user mode
1491 utility has to change the hardware regs */
1494 case 5: /* Inverted screen on/off */
1495 if (vc
->vc_decscnm
!= on_off
) {
1496 vc
->vc_decscnm
= on_off
;
1497 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1501 case 6: /* Origin relative/absolute */
1502 vc
->vc_decom
= on_off
;
1505 case 7: /* Autowrap on/off */
1506 vc
->vc_decawm
= on_off
;
1508 case 8: /* Autorepeat on/off */
1510 set_kbd(vc
, decarm
);
1512 clr_kbd(vc
, decarm
);
1515 vc
->vc_report_mouse
= on_off
? 1 : 0;
1517 case 25: /* Cursor on/off */
1518 vc
->vc_deccm
= on_off
;
1521 vc
->vc_report_mouse
= on_off
? 2 : 0;
1525 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1526 case 3: /* Monitor (display ctrls) */
1527 vc
->vc_disp_ctrl
= on_off
;
1529 case 4: /* Insert Mode on/off */
1530 vc
->vc_decim
= on_off
;
1532 case 20: /* Lf, Enter == CrLf/Lf */
1542 /* console_lock is held */
1543 static void setterm_command(struct vc_data
*vc
)
1545 switch(vc
->vc_par
[0]) {
1546 case 1: /* set color for underline mode */
1547 if (vc
->vc_can_do_color
&&
1548 vc
->vc_par
[1] < 16) {
1549 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1550 if (vc
->vc_underline
)
1554 case 2: /* set color for half intensity mode */
1555 if (vc
->vc_can_do_color
&&
1556 vc
->vc_par
[1] < 16) {
1557 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1558 if (vc
->vc_intensity
== 0)
1562 case 8: /* store colors as defaults */
1563 vc
->vc_def_color
= vc
->vc_attr
;
1564 if (vc
->vc_hi_font_mask
== 0x100)
1565 vc
->vc_def_color
>>= 1;
1569 case 9: /* set blanking interval */
1570 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60;
1571 poke_blanked_console();
1573 case 10: /* set bell frequency in Hz */
1574 if (vc
->vc_npar
>= 1)
1575 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1577 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1579 case 11: /* set bell duration in msec */
1580 if (vc
->vc_npar
>= 1)
1581 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1582 msecs_to_jiffies(vc
->vc_par
[1]) : 0;
1584 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1586 case 12: /* bring specified console to the front */
1587 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1588 set_console(vc
->vc_par
[1] - 1);
1590 case 13: /* unblank the screen */
1591 poke_blanked_console();
1593 case 14: /* set vesa powerdown interval */
1594 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1596 case 15: /* activate the previous console */
1597 set_console(last_console
);
1599 case 16: /* set cursor blink duration in msec */
1600 if (vc
->vc_npar
>= 1 && vc
->vc_par
[1] >= 50 &&
1601 vc
->vc_par
[1] <= USHRT_MAX
)
1602 vc
->vc_cur_blink_ms
= vc
->vc_par
[1];
1604 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1609 /* console_lock is held */
1610 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1612 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1613 nr
= vc
->vc_cols
- vc
->vc_x
;
1616 insert_char(vc
, nr
);
1619 /* console_lock is held */
1620 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1622 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1623 nr
= vc
->vc_rows
- vc
->vc_y
;
1626 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1627 vc
->vc_need_wrap
= 0;
1630 /* console_lock is held */
1631 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1633 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1634 nr
= vc
->vc_cols
- vc
->vc_x
;
1637 delete_char(vc
, nr
);
1640 /* console_lock is held */
1641 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1643 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1644 nr
= vc
->vc_rows
- vc
->vc_y
;
1647 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1648 vc
->vc_need_wrap
= 0;
1651 /* console_lock is held (except via vc_init->reset_terminal */
1652 static void save_cur(struct vc_data
*vc
)
1654 vc
->vc_saved_x
= vc
->vc_x
;
1655 vc
->vc_saved_y
= vc
->vc_y
;
1656 vc
->vc_s_intensity
= vc
->vc_intensity
;
1657 vc
->vc_s_italic
= vc
->vc_italic
;
1658 vc
->vc_s_underline
= vc
->vc_underline
;
1659 vc
->vc_s_blink
= vc
->vc_blink
;
1660 vc
->vc_s_reverse
= vc
->vc_reverse
;
1661 vc
->vc_s_charset
= vc
->vc_charset
;
1662 vc
->vc_s_color
= vc
->vc_color
;
1663 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1664 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1667 /* console_lock is held */
1668 static void restore_cur(struct vc_data
*vc
)
1670 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1671 vc
->vc_intensity
= vc
->vc_s_intensity
;
1672 vc
->vc_italic
= vc
->vc_s_italic
;
1673 vc
->vc_underline
= vc
->vc_s_underline
;
1674 vc
->vc_blink
= vc
->vc_s_blink
;
1675 vc
->vc_reverse
= vc
->vc_s_reverse
;
1676 vc
->vc_charset
= vc
->vc_s_charset
;
1677 vc
->vc_color
= vc
->vc_s_color
;
1678 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1679 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1680 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1682 vc
->vc_need_wrap
= 0;
1685 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESfunckey
,
1686 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1689 /* console_lock is held (except via vc_init()) */
1690 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1693 vc
->vc_bottom
= vc
->vc_rows
;
1694 vc
->vc_state
= ESnormal
;
1696 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1697 vc
->vc_G0_charset
= LAT1_MAP
;
1698 vc
->vc_G1_charset
= GRAF_MAP
;
1700 vc
->vc_need_wrap
= 0;
1701 vc
->vc_report_mouse
= 0;
1702 vc
->vc_utf
= default_utf8
;
1703 vc
->vc_utf_count
= 0;
1705 vc
->vc_disp_ctrl
= 0;
1706 vc
->vc_toggle_meta
= 0;
1711 vc
->vc_deccm
= global_cursor_default
;
1714 vt_reset_keyboard(vc
->vc_num
);
1716 vc
->vc_cursor_type
= cur_default
;
1717 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1722 vc
->vc_tab_stop
[0] = 0x01010100;
1723 vc
->vc_tab_stop
[1] =
1724 vc
->vc_tab_stop
[2] =
1725 vc
->vc_tab_stop
[3] =
1726 vc
->vc_tab_stop
[4] =
1727 vc
->vc_tab_stop
[5] =
1728 vc
->vc_tab_stop
[6] =
1729 vc
->vc_tab_stop
[7] = 0x01010101;
1731 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1732 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1733 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1741 /* console_lock is held */
1742 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1745 * Control characters can be used in the _middle_
1746 * of an escape sequence.
1748 if (vc
->vc_state
== ESosc
&& c
>=8 && c
<=13) /* ... except for OSC */
1754 if (vc
->vc_state
== ESosc
)
1755 vc
->vc_state
= ESnormal
;
1756 else if (vc
->vc_bell_duration
)
1757 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1763 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1764 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1766 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1769 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1770 notify_write(vc
, '\t');
1772 case 10: case 11: case 12:
1774 if (!is_kbd(vc
, lnm
))
1781 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1782 vc
->vc_disp_ctrl
= 1;
1786 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1787 vc
->vc_disp_ctrl
= 0;
1790 vc
->vc_state
= ESnormal
;
1793 vc
->vc_state
= ESesc
;
1799 vc
->vc_state
= ESsquare
;
1802 switch(vc
->vc_state
) {
1804 vc
->vc_state
= ESnormal
;
1807 vc
->vc_state
= ESsquare
;
1810 vc
->vc_state
= ESnonstd
;
1813 vc
->vc_state
= ESpercent
;
1826 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1838 vc
->vc_state
= ESsetG0
;
1841 vc
->vc_state
= ESsetG1
;
1844 vc
->vc_state
= EShash
;
1847 reset_terminal(vc
, 1);
1849 case '>': /* Numeric keypad */
1850 clr_kbd(vc
, kbdapplic
);
1852 case '=': /* Appl. keypad */
1853 set_kbd(vc
, kbdapplic
);
1858 if (c
=='P') { /* palette escape sequence */
1859 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1860 vc
->vc_par
[vc
->vc_npar
] = 0;
1862 vc
->vc_state
= ESpalette
;
1864 } else if (c
=='R') { /* reset palette */
1866 vc
->vc_state
= ESnormal
;
1867 } else if (c
>='0' && c
<='9')
1868 vc
->vc_state
= ESosc
;
1870 vc
->vc_state
= ESnormal
;
1874 vc
->vc_par
[vc
->vc_npar
++] = hex_to_bin(c
);
1875 if (vc
->vc_npar
== 7) {
1876 int i
= vc
->vc_par
[0] * 3, j
= 1;
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
++];
1881 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1882 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1884 vc
->vc_state
= ESnormal
;
1887 vc
->vc_state
= ESnormal
;
1890 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1891 vc
->vc_par
[vc
->vc_npar
] = 0;
1893 vc
->vc_state
= ESgetpars
;
1894 if (c
== '[') { /* Function key */
1895 vc
->vc_state
=ESfunckey
;
1898 vc
->vc_ques
= (c
== '?');
1902 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1905 } else if (c
>='0' && c
<='9') {
1906 vc
->vc_par
[vc
->vc_npar
] *= 10;
1907 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1910 vc
->vc_state
= ESnormal
;
1921 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1923 vc
->vc_cursor_type
= cur_default
;
1931 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1933 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1939 if (vc
->vc_par
[0] == 5)
1941 else if (vc
->vc_par
[0] == 6)
1942 cursor_report(vc
, tty
);
1954 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1959 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1964 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1969 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1974 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1979 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1984 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1989 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
1996 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
1999 csi_J(vc
, vc
->vc_par
[0]);
2002 csi_K(vc
, vc
->vc_par
[0]);
2005 csi_L(vc
, vc
->vc_par
[0]);
2008 csi_M(vc
, vc
->vc_par
[0]);
2011 csi_P(vc
, vc
->vc_par
[0]);
2019 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
2020 else if (vc
->vc_par
[0] == 3) {
2021 vc
->vc_tab_stop
[0] =
2022 vc
->vc_tab_stop
[1] =
2023 vc
->vc_tab_stop
[2] =
2024 vc
->vc_tab_stop
[3] =
2025 vc
->vc_tab_stop
[4] =
2026 vc
->vc_tab_stop
[5] =
2027 vc
->vc_tab_stop
[6] =
2028 vc
->vc_tab_stop
[7] = 0;
2034 case 'q': /* DECLL - but only 3 leds */
2035 /* map 0,1,2,3 to 0,1,2,4 */
2036 if (vc
->vc_par
[0] < 4)
2037 vt_set_led_state(vc
->vc_num
,
2038 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
2044 vc
->vc_par
[1] = vc
->vc_rows
;
2045 /* Minimum allowed region is 2 lines */
2046 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
2047 vc
->vc_par
[1] <= vc
->vc_rows
) {
2048 vc
->vc_top
= vc
->vc_par
[0] - 1;
2049 vc
->vc_bottom
= vc
->vc_par
[1];
2060 csi_X(vc
, vc
->vc_par
[0]);
2063 csi_at(vc
, vc
->vc_par
[0]);
2065 case ']': /* setterm functions */
2066 setterm_command(vc
);
2071 vc
->vc_state
= ESnormal
;
2073 case '@': /* defined in ISO 2022 */
2076 case 'G': /* prelim official escape code */
2077 case '8': /* retained for compatibility */
2083 vc
->vc_state
= ESnormal
;
2086 vc
->vc_state
= ESnormal
;
2088 /* DEC screen alignment test. kludge :-) */
2089 vc
->vc_video_erase_char
=
2090 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2092 vc
->vc_video_erase_char
=
2093 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2094 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2099 vc
->vc_G0_charset
= GRAF_MAP
;
2101 vc
->vc_G0_charset
= LAT1_MAP
;
2103 vc
->vc_G0_charset
= IBMPC_MAP
;
2105 vc
->vc_G0_charset
= USER_MAP
;
2106 if (vc
->vc_charset
== 0)
2107 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2108 vc
->vc_state
= ESnormal
;
2112 vc
->vc_G1_charset
= GRAF_MAP
;
2114 vc
->vc_G1_charset
= LAT1_MAP
;
2116 vc
->vc_G1_charset
= IBMPC_MAP
;
2118 vc
->vc_G1_charset
= USER_MAP
;
2119 if (vc
->vc_charset
== 1)
2120 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2121 vc
->vc_state
= ESnormal
;
2126 vc
->vc_state
= ESnormal
;
2130 /* is_double_width() is based on the wcwidth() implementation by
2131 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2132 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2139 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
2144 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
2146 while (max
>= min
) {
2147 mid
= (min
+ max
) / 2;
2148 if (ucs
> table
[mid
].last
)
2150 else if (ucs
< table
[mid
].first
)
2158 static int is_double_width(uint32_t ucs
)
2160 static const struct interval double_width
[] = {
2161 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2162 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2163 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2164 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2166 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
2169 /* acquires console_lock */
2170 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2172 #ifdef VT_BUF_VRAM_ONLY
2173 #define FLUSH do { } while(0);
2175 #define FLUSH if (draw_x >= 0) { \
2176 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2181 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2182 unsigned int currcons
;
2183 unsigned long draw_from
= 0, draw_to
= 0;
2185 unsigned char vc_attr
;
2186 struct vt_notifier_param param
;
2190 u16 himask
, charmask
;
2198 vc
= tty
->driver_data
;
2200 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2205 currcons
= vc
->vc_num
;
2206 if (!vc_cons_allocated(currcons
)) {
2207 /* could this happen? */
2208 pr_warn_once("con_write: tty %d not allocated\n", currcons
+1);
2213 himask
= vc
->vc_hi_font_mask
;
2214 charmask
= himask
? 0x1ff : 0xff;
2216 /* undraw cursor first */
2222 while (!tty
->stopped
&& count
) {
2232 /* Do no translation at all in control states */
2233 if (vc
->vc_state
!= ESnormal
) {
2235 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2236 /* Combine UTF-8 into Unicode in vc_utf_char.
2237 * vc_utf_count is the number of continuation bytes still
2238 * expected to arrive.
2239 * vc_npar is the number of continuation bytes arrived so
2243 if ((c
& 0xc0) == 0x80) {
2244 /* Continuation byte received */
2245 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2246 if (vc
->vc_utf_count
) {
2247 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2249 if (--vc
->vc_utf_count
) {
2250 /* Still need some bytes */
2253 /* Got a whole character */
2254 c
= vc
->vc_utf_char
;
2255 /* Reject overlong sequences */
2256 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2257 c
> utf8_length_changes
[vc
->vc_npar
])
2260 /* Unexpected continuation byte */
2261 vc
->vc_utf_count
= 0;
2265 /* Single ASCII byte or first byte of a sequence received */
2266 if (vc
->vc_utf_count
) {
2267 /* Continuation byte expected */
2269 vc
->vc_utf_count
= 0;
2271 } else if (c
> 0x7f) {
2272 /* First byte of a multibyte sequence received */
2274 if ((c
& 0xe0) == 0xc0) {
2275 vc
->vc_utf_count
= 1;
2276 vc
->vc_utf_char
= (c
& 0x1f);
2277 } else if ((c
& 0xf0) == 0xe0) {
2278 vc
->vc_utf_count
= 2;
2279 vc
->vc_utf_char
= (c
& 0x0f);
2280 } else if ((c
& 0xf8) == 0xf0) {
2281 vc
->vc_utf_count
= 3;
2282 vc
->vc_utf_char
= (c
& 0x07);
2283 } else if ((c
& 0xfc) == 0xf8) {
2284 vc
->vc_utf_count
= 4;
2285 vc
->vc_utf_char
= (c
& 0x03);
2286 } else if ((c
& 0xfe) == 0xfc) {
2287 vc
->vc_utf_count
= 5;
2288 vc
->vc_utf_char
= (c
& 0x01);
2290 /* 254 and 255 are invalid */
2293 if (vc
->vc_utf_count
) {
2294 /* Still need some bytes */
2298 /* Nothing to do if an ASCII byte was received */
2300 /* End of UTF-8 decoding. */
2301 /* c is the received character, or U+FFFD for invalid sequences. */
2302 /* Replace invalid Unicode code points with U+FFFD too */
2303 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2306 } else { /* no utf or alternate charset mode */
2307 tc
= vc_translate(vc
, c
);
2311 if (atomic_notifier_call_chain(&vt_notifier_list
, VT_PREWRITE
,
2312 ¶m
) == NOTIFY_STOP
)
2315 /* If the original code was a control character we
2316 * only allow a glyph to be displayed if the code is
2317 * not normally used (such as for cursor movement) or
2318 * if the disp_ctrl mode has been explicitly enabled.
2319 * Certain characters (as given by the CTRL_ALWAYS
2320 * bitmap) are always displayed as control characters,
2321 * as the console would be pretty useless without
2322 * them; to display an arbitrary font position use the
2323 * direct-to-font zone in UTF-8 mode.
2325 ok
= tc
&& (c
>= 32 ||
2326 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2327 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2328 && (c
!= 127 || vc
->vc_disp_ctrl
)
2331 if (vc
->vc_state
== ESnormal
&& ok
) {
2332 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2333 if (is_double_width(c
))
2336 /* Now try to find out how to display it */
2337 tc
= conv_uni_to_pc(vc
, tc
);
2338 if (tc
& ~charmask
) {
2339 if (tc
== -1 || tc
== -2) {
2340 continue; /* nothing to display */
2342 /* Glyph not found */
2343 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2344 /* In legacy mode use the glyph we get by a 1:1 mapping.
2345 This would make absolutely no sense with Unicode in mind,
2346 but do this for ASCII characters since a font may lack
2347 Unicode mapping info and we don't want to end up with
2348 having question marks only. */
2351 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2352 tc
= conv_uni_to_pc(vc
, 0xfffd);
2355 tc
= conv_uni_to_pc(vc
, '?');
2356 if (tc
< 0) tc
= '?';
2362 vc_attr
= vc
->vc_attr
;
2364 /* invert vc_attr */
2365 if (!vc
->vc_can_do_color
) {
2366 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2367 } else if (vc
->vc_hi_font_mask
== 0x100) {
2368 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2370 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2376 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2378 if (vc
->vc_need_wrap
) {
2385 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2386 (vc_attr
<< 8) + tc
,
2387 (u16
*) vc
->vc_pos
);
2388 if (DO_UPDATE(vc
) && draw_x
< 0) {
2390 draw_from
= vc
->vc_pos
;
2392 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2393 vc
->vc_need_wrap
= vc
->vc_decawm
;
2394 draw_to
= vc
->vc_pos
+ 2;
2397 draw_to
= (vc
->vc_pos
+= 2);
2400 if (!--width
) break;
2402 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2403 if (tc
< 0) tc
= ' ';
2405 notify_write(vc
, c
);
2416 goto rescan_last_byte
;
2421 do_con_trol(tty
, vc
, orig
);
2424 console_conditional_schedule();
2432 * This is the console switching callback.
2434 * Doing console switching in a process context allows
2435 * us to do the switches asynchronously (needed when we want
2436 * to switch due to a keyboard interrupt). Synchronization
2437 * with other console code and prevention of re-entrancy is
2438 * ensured with console_lock.
2440 static void console_callback(struct work_struct
*ignored
)
2444 if (want_console
>= 0) {
2445 if (want_console
!= fg_console
&&
2446 vc_cons_allocated(want_console
)) {
2447 hide_cursor(vc_cons
[fg_console
].d
);
2448 change_console(vc_cons
[want_console
].d
);
2449 /* we only changed when the console had already
2450 been allocated - a new console is not created
2451 in an interrupt routine */
2455 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2456 do_poke_blanked_console
= 0;
2457 poke_blanked_console();
2459 if (scrollback_delta
) {
2460 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2462 if (vc
->vc_mode
== KD_TEXT
)
2463 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2464 scrollback_delta
= 0;
2466 if (blank_timer_expired
) {
2468 blank_timer_expired
= 0;
2470 notify_update(vc_cons
[fg_console
].d
);
2475 int set_console(int nr
)
2477 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2479 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2480 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2483 * Console switch will fail in console_callback() or
2484 * change_console() so there is no point scheduling
2487 * Existing set_console() users don't check the return
2488 * value so this shouldn't break anything
2494 schedule_console_callback();
2499 struct tty_driver
*console_driver
;
2501 #ifdef CONFIG_VT_CONSOLE
2504 * vt_kmsg_redirect() - Sets/gets the kernel message console
2505 * @new: The new virtual terminal number or -1 if the console should stay
2508 * By default, the kernel messages are always printed on the current virtual
2509 * console. However, the user may modify that default with the
2510 * TIOCL_SETKMSGREDIRECT ioctl call.
2512 * This function sets the kernel message console to be @new. It returns the old
2513 * virtual console number. The virtual terminal number 0 (both as parameter and
2514 * return value) means no redirection (i.e. always printed on the currently
2517 * The parameter -1 means that only the current console is returned, but the
2518 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2519 * case to make the code more understandable.
2521 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2522 * the parameter and always returns 0.
2524 int vt_kmsg_redirect(int new)
2526 static int kmsg_con
;
2529 return xchg(&kmsg_con
, new);
2535 * Console on virtual terminal
2537 * The console must be locked when we get here.
2540 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2542 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2544 static DEFINE_SPINLOCK(printing_lock
);
2545 const ushort
*start
;
2550 /* console busy or not yet initialized */
2553 if (!spin_trylock(&printing_lock
))
2556 kmsg_console
= vt_get_kmsg_redirect();
2557 if (kmsg_console
&& vc_cons_allocated(kmsg_console
- 1))
2558 vc
= vc_cons
[kmsg_console
- 1].d
;
2560 /* read `x' only after setting currcons properly (otherwise
2561 the `x' macro will read the x of the foreground console). */
2564 if (!vc_cons_allocated(fg_console
)) {
2566 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2570 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
2573 /* undraw cursor first */
2577 start
= (ushort
*)vc
->vc_pos
;
2579 /* Contrived structure to try to emulate original need_wrap behaviour
2580 * Problems caused when we have need_wrap set on '\n' character */
2583 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2585 if (CON_IS_VISIBLE(vc
))
2586 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2588 if (vc
->vc_need_wrap
)
2592 if (c
== 8) { /* backspace */
2594 start
= (ushort
*)vc
->vc_pos
;
2601 start
= (ushort
*)vc
->vc_pos
;
2603 if (c
== 10 || c
== 13)
2606 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2607 notify_write(vc
, c
);
2609 if (myx
== vc
->vc_cols
- 1) {
2610 vc
->vc_need_wrap
= 1;
2617 if (CON_IS_VISIBLE(vc
))
2618 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2620 if (vc
->vc_x
== vc
->vc_cols
) {
2622 vc
->vc_need_wrap
= 1;
2629 spin_unlock(&printing_lock
);
2632 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2634 *index
= c
->index
? c
->index
-1 : fg_console
;
2635 return console_driver
;
2638 static struct console vt_console_driver
= {
2640 .write
= vt_console_print
,
2641 .device
= vt_console_device
,
2642 .unblank
= unblank_screen
,
2643 .flags
= CON_PRINTBUFFER
,
2649 * Handling of Linux-specific VC ioctls
2653 * Generally a bit racy with respect to console_lock();.
2655 * There are some functions which don't need it.
2657 * There are some functions which can sleep for arbitrary periods
2658 * (paste_selection) but we don't need the lock there anyway.
2660 * set_selection has locking, and definitely needs it
2663 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2666 char __user
*p
= (char __user
*)arg
;
2670 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2672 if (get_user(type
, p
))
2680 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2683 case TIOCL_PASTESEL
:
2684 ret
= paste_selection(tty
);
2686 case TIOCL_UNBLANKSCREEN
:
2691 case TIOCL_SELLOADLUT
:
2693 ret
= sel_loadlut(p
);
2696 case TIOCL_GETSHIFTSTATE
:
2699 * Make it possible to react to Shift+Mousebutton.
2700 * Note that 'shift_state' is an undocumented
2701 * kernel-internal variable; programs not closely
2702 * related to the kernel should not use this.
2704 data
= vt_get_shift_state();
2705 ret
= __put_user(data
, p
);
2707 case TIOCL_GETMOUSEREPORTING
:
2708 console_lock(); /* May be overkill */
2709 data
= mouse_reporting();
2711 ret
= __put_user(data
, p
);
2713 case TIOCL_SETVESABLANK
:
2715 ret
= set_vesa_blanking(p
);
2718 case TIOCL_GETKMSGREDIRECT
:
2719 data
= vt_get_kmsg_redirect();
2720 ret
= __put_user(data
, p
);
2722 case TIOCL_SETKMSGREDIRECT
:
2723 if (!capable(CAP_SYS_ADMIN
)) {
2726 if (get_user(data
, p
+1))
2729 vt_kmsg_redirect(data
);
2732 case TIOCL_GETFGCONSOLE
:
2733 /* No locking needed as this is a transiently
2734 correct return anyway if the caller hasn't
2735 disabled switching */
2738 case TIOCL_SCROLLCONSOLE
:
2739 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2742 /* Need the console lock here. Note that lots
2743 of other calls need fixing before the lock
2744 is actually useful ! */
2746 scrollfront(vc_cons
[fg_console
].d
, lines
);
2751 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2757 case TIOCL_BLANKEDSCREEN
:
2758 ret
= console_blanked
;
2768 * /dev/ttyN handling
2771 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2775 retval
= do_con_write(tty
, buf
, count
);
2776 con_flush_chars(tty
);
2781 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2784 return 0; /* n_r3964 calls put_char() from interrupt context */
2785 return do_con_write(tty
, &ch
, 1);
2788 static int con_write_room(struct tty_struct
*tty
)
2792 return 32768; /* No limit, really; we're not buffering */
2795 static int con_chars_in_buffer(struct tty_struct
*tty
)
2797 return 0; /* we're not buffering */
2801 * con_throttle and con_unthrottle are only used for
2802 * paste_selection(), which has to stuff in a large number of
2805 static void con_throttle(struct tty_struct
*tty
)
2809 static void con_unthrottle(struct tty_struct
*tty
)
2811 struct vc_data
*vc
= tty
->driver_data
;
2813 wake_up_interruptible(&vc
->paste_wait
);
2817 * Turn the Scroll-Lock LED on when the tty is stopped
2819 static void con_stop(struct tty_struct
*tty
)
2824 console_num
= tty
->index
;
2825 if (!vc_cons_allocated(console_num
))
2827 vt_kbd_con_stop(console_num
);
2831 * Turn the Scroll-Lock LED off when the console is started
2833 static void con_start(struct tty_struct
*tty
)
2838 console_num
= tty
->index
;
2839 if (!vc_cons_allocated(console_num
))
2841 vt_kbd_con_start(console_num
);
2844 static void con_flush_chars(struct tty_struct
*tty
)
2848 if (in_interrupt()) /* from flush_to_ldisc */
2851 /* if we race with con_close(), vt may be null */
2853 vc
= tty
->driver_data
;
2860 * Allocate the console screen memory.
2862 static int con_install(struct tty_driver
*driver
, struct tty_struct
*tty
)
2864 unsigned int currcons
= tty
->index
;
2869 ret
= vc_allocate(currcons
);
2873 vc
= vc_cons
[currcons
].d
;
2875 /* Still being freed */
2881 ret
= tty_port_install(&vc
->port
, driver
, tty
);
2885 tty
->driver_data
= vc
;
2888 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2889 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2890 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2893 tty
->termios
.c_iflag
|= IUTF8
;
2895 tty
->termios
.c_iflag
&= ~IUTF8
;
2901 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2903 /* everything done in install */
2908 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2910 /* Nothing to do - we defer to shutdown */
2913 static void con_shutdown(struct tty_struct
*tty
)
2915 struct vc_data
*vc
= tty
->driver_data
;
2918 vc
->port
.tty
= NULL
;
2922 static int default_color
= 7; /* white */
2923 static int default_italic_color
= 2; // green (ASCII)
2924 static int default_underline_color
= 3; // cyan (ASCII)
2925 module_param_named(color
, default_color
, int, S_IRUGO
| S_IWUSR
);
2926 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2927 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2929 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2930 unsigned int cols
, int do_clear
)
2936 vc
->vc_size_row
= cols
<< 1;
2937 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2940 vc
->vc_pos
= vc
->vc_origin
;
2942 for (j
=k
=0; j
<16; j
++) {
2943 vc
->vc_palette
[k
++] = default_red
[j
] ;
2944 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2945 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2947 vc
->vc_def_color
= default_color
;
2948 vc
->vc_ulcolor
= default_underline_color
;
2949 vc
->vc_itcolor
= default_italic_color
;
2950 vc
->vc_halfcolor
= 0x08; /* grey */
2951 init_waitqueue_head(&vc
->paste_wait
);
2952 reset_terminal(vc
, do_clear
);
2956 * This routine initializes console interrupts, and does nothing
2957 * else. If you want the screen to clear, call tty_write with
2958 * the appropriate escape-sequence.
2961 static int __init
con_init(void)
2963 const char *display_desc
= NULL
;
2965 unsigned int currcons
= 0, i
;
2970 display_desc
= conswitchp
->con_startup();
2971 if (!display_desc
) {
2977 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2978 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2980 if (con_driver
->con
== NULL
) {
2981 con_driver
->con
= conswitchp
;
2982 con_driver
->desc
= display_desc
;
2983 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2984 con_driver
->first
= 0;
2985 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2990 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
2991 con_driver_map
[i
] = conswitchp
;
2993 if (blankinterval
) {
2994 blank_state
= blank_normal_wait
;
2995 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
2998 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
2999 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
3000 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
3001 tty_port_init(&vc
->port
);
3002 visual_init(vc
, currcons
, 1);
3003 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
3004 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
3005 currcons
|| !vc
->vc_sw
->con_save_screen
);
3007 currcons
= fg_console
= 0;
3008 master_display_fg
= vc
= vc_cons
[currcons
].d
;
3011 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
3014 pr_info("Console: %s %s %dx%d\n",
3015 vc
->vc_can_do_color
? "colour" : "mono",
3016 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
3021 #ifdef CONFIG_VT_CONSOLE
3022 register_console(&vt_console_driver
);
3026 console_initcall(con_init
);
3028 static const struct tty_operations con_ops
= {
3029 .install
= con_install
,
3033 .write_room
= con_write_room
,
3034 .put_char
= con_put_char
,
3035 .flush_chars
= con_flush_chars
,
3036 .chars_in_buffer
= con_chars_in_buffer
,
3038 #ifdef CONFIG_COMPAT
3039 .compat_ioctl
= vt_compat_ioctl
,
3043 .throttle
= con_throttle
,
3044 .unthrottle
= con_unthrottle
,
3045 .resize
= vt_resize
,
3046 .shutdown
= con_shutdown
3049 static struct cdev vc0_cdev
;
3051 static ssize_t
show_tty_active(struct device
*dev
,
3052 struct device_attribute
*attr
, char *buf
)
3054 return sprintf(buf
, "tty%d\n", fg_console
+ 1);
3056 static DEVICE_ATTR(active
, S_IRUGO
, show_tty_active
, NULL
);
3058 static struct attribute
*vt_dev_attrs
[] = {
3059 &dev_attr_active
.attr
,
3063 ATTRIBUTE_GROUPS(vt_dev
);
3065 int __init
vty_init(const struct file_operations
*console_fops
)
3067 cdev_init(&vc0_cdev
, console_fops
);
3068 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
3069 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
3070 panic("Couldn't register /dev/tty0 driver\n");
3071 tty0dev
= device_create_with_groups(tty_class
, NULL
,
3072 MKDEV(TTY_MAJOR
, 0), NULL
,
3073 vt_dev_groups
, "tty0");
3074 if (IS_ERR(tty0dev
))
3079 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
3080 if (!console_driver
)
3081 panic("Couldn't allocate console driver\n");
3083 console_driver
->name
= "tty";
3084 console_driver
->name_base
= 1;
3085 console_driver
->major
= TTY_MAJOR
;
3086 console_driver
->minor_start
= 1;
3087 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
3088 console_driver
->init_termios
= tty_std_termios
;
3090 console_driver
->init_termios
.c_iflag
|= IUTF8
;
3091 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
3092 tty_set_operations(console_driver
, &con_ops
);
3093 if (tty_register_driver(console_driver
))
3094 panic("Couldn't register console driver\n");
3097 #ifdef CONFIG_MDA_CONSOLE
3103 #ifndef VT_SINGLE_DRIVER
3105 static struct class *vtconsole_class
;
3107 static int do_bind_con_driver(const struct consw
*csw
, int first
, int last
,
3110 struct module
*owner
= csw
->owner
;
3111 const char *desc
= NULL
;
3112 struct con_driver
*con_driver
;
3113 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
3115 if (!try_module_get(owner
))
3118 WARN_CONSOLE_UNLOCKED();
3120 /* check if driver is registered */
3121 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3122 con_driver
= ®istered_con_driver
[i
];
3124 if (con_driver
->con
== csw
) {
3125 desc
= con_driver
->desc
;
3134 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
3136 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3141 module_put(conswitchp
->owner
);
3143 __module_get(owner
);
3147 first
= max(first
, con_driver
->first
);
3148 last
= min(last
, con_driver
->last
);
3150 for (i
= first
; i
<= last
; i
++) {
3152 struct vc_data
*vc
= vc_cons
[i
].d
;
3154 if (con_driver_map
[i
])
3155 module_put(con_driver_map
[i
]->owner
);
3156 __module_get(owner
);
3157 con_driver_map
[i
] = csw
;
3159 if (!vc
|| !vc
->vc_sw
)
3164 if (CON_IS_VISIBLE(vc
)) {
3169 old_was_color
= vc
->vc_can_do_color
;
3170 vc
->vc_sw
->con_deinit(vc
);
3171 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3172 visual_init(vc
, i
, 0);
3176 /* If the console changed between mono <-> color, then
3177 * the attributes in the screenbuf will be wrong. The
3178 * following resets all attributes to something sane.
3180 if (old_was_color
!= vc
->vc_can_do_color
)
3181 clear_buffer_attributes(vc
);
3184 pr_info("Console: switching ");
3186 printk("consoles %d-%d ", first
+1, last
+1);
3188 struct vc_data
*vc
= vc_cons
[j
].d
;
3190 printk("to %s %s %dx%d\n",
3191 vc
->vc_can_do_color
? "colour" : "mono",
3192 desc
, vc
->vc_cols
, vc
->vc_rows
);
3199 printk("to %s\n", desc
);
3208 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3209 /* unlocked version of unbind_con_driver() */
3210 int do_unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3212 struct module
*owner
= csw
->owner
;
3213 const struct consw
*defcsw
= NULL
;
3214 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3215 int i
, retval
= -ENODEV
;
3217 if (!try_module_get(owner
))
3220 WARN_CONSOLE_UNLOCKED();
3222 /* check if driver is registered and if it is unbindable */
3223 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3224 con_driver
= ®istered_con_driver
[i
];
3226 if (con_driver
->con
== csw
&&
3227 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3238 /* check if backup driver exists */
3239 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3240 con_back
= ®istered_con_driver
[i
];
3242 if (con_back
->con
&& con_back
->con
!= csw
) {
3243 defcsw
= con_back
->con
;
3252 if (!con_is_bound(csw
))
3255 first
= max(first
, con_driver
->first
);
3256 last
= min(last
, con_driver
->last
);
3258 for (i
= first
; i
<= last
; i
++) {
3259 if (con_driver_map
[i
] == csw
) {
3260 module_put(csw
->owner
);
3261 con_driver_map
[i
] = NULL
;
3265 if (!con_is_bound(defcsw
)) {
3266 const struct consw
*defconsw
= conswitchp
;
3268 defcsw
->con_startup();
3269 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3271 * vgacon may change the default driver to point
3272 * to dummycon, we restore it here...
3274 conswitchp
= defconsw
;
3277 if (!con_is_bound(csw
))
3278 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3280 /* ignore return value, binding should not fail */
3281 do_bind_con_driver(defcsw
, first
, last
, deflt
);
3287 EXPORT_SYMBOL_GPL(do_unbind_con_driver
);
3289 static int vt_bind(struct con_driver
*con
)
3291 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3292 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3294 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3299 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3300 struct con_driver
*con
= ®istered_con_driver
[i
];
3302 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3314 for (i
= con
->first
; i
<= con
->last
; i
++) {
3315 if (con_driver_map
[i
] == defcsw
) {
3320 } else if (first
!= -1)
3324 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3328 do_bind_con_driver(csw
, first
, last
, deflt
);
3339 static int vt_unbind(struct con_driver
*con
)
3341 const struct consw
*csw
= NULL
;
3342 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3345 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3353 for (i
= con
->first
; i
<= con
->last
; i
++) {
3354 if (con_driver_map
[i
] == csw
) {
3359 } else if (first
!= -1)
3363 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3367 ret
= do_unbind_con_driver(csw
, first
, last
, deflt
);
3381 static inline int vt_bind(struct con_driver
*con
)
3385 static inline int vt_unbind(struct con_driver
*con
)
3389 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3391 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3392 const char *buf
, size_t count
)
3394 struct con_driver
*con
= dev_get_drvdata(dev
);
3395 int bind
= simple_strtoul(buf
, NULL
, 0);
3409 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3412 struct con_driver
*con
= dev_get_drvdata(dev
);
3413 int bind
= con_is_bound(con
->con
);
3415 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3418 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3421 struct con_driver
*con
= dev_get_drvdata(dev
);
3423 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3424 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3429 static DEVICE_ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
);
3430 static DEVICE_ATTR(name
, S_IRUGO
, show_name
, NULL
);
3432 static struct attribute
*con_dev_attrs
[] = {
3433 &dev_attr_bind
.attr
,
3434 &dev_attr_name
.attr
,
3438 ATTRIBUTE_GROUPS(con_dev
);
3440 static int vtconsole_init_device(struct con_driver
*con
)
3442 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3446 static void vtconsole_deinit_device(struct con_driver
*con
)
3448 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3452 * con_is_bound - checks if driver is bound to the console
3453 * @csw: console driver
3455 * RETURNS: zero if unbound, nonzero if bound
3457 * Drivers can call this and if zero, they should release
3458 * all resources allocated on con_startup()
3460 int con_is_bound(const struct consw
*csw
)
3464 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3465 if (con_driver_map
[i
] == csw
) {
3473 EXPORT_SYMBOL(con_is_bound
);
3476 * con_debug_enter - prepare the console for the kernel debugger
3477 * @sw: console driver
3479 * Called when the console is taken over by the kernel debugger, this
3480 * function needs to save the current console state, then put the console
3481 * into a state suitable for the kernel debugger.
3484 * Zero on success, nonzero if a failure occurred when trying to prepare
3485 * the console for the debugger.
3487 int con_debug_enter(struct vc_data
*vc
)
3491 saved_fg_console
= fg_console
;
3492 saved_last_console
= last_console
;
3493 saved_want_console
= want_console
;
3494 saved_vc_mode
= vc
->vc_mode
;
3495 saved_console_blanked
= console_blanked
;
3496 vc
->vc_mode
= KD_TEXT
;
3497 console_blanked
= 0;
3498 if (vc
->vc_sw
->con_debug_enter
)
3499 ret
= vc
->vc_sw
->con_debug_enter(vc
);
3500 #ifdef CONFIG_KGDB_KDB
3501 /* Set the initial LINES variable if it is not already set */
3502 if (vc
->vc_rows
< 999) {
3505 const char *setargs
[3] = {
3510 if (kdbgetintenv(setargs
[0], &linecount
)) {
3511 snprintf(lns
, 4, "%i", vc
->vc_rows
);
3512 kdb_set(2, setargs
);
3515 if (vc
->vc_cols
< 999) {
3518 const char *setargs
[3] = {
3523 if (kdbgetintenv(setargs
[0], &colcount
)) {
3524 snprintf(cols
, 4, "%i", vc
->vc_cols
);
3525 kdb_set(2, setargs
);
3528 #endif /* CONFIG_KGDB_KDB */
3531 EXPORT_SYMBOL_GPL(con_debug_enter
);
3534 * con_debug_leave - restore console state
3535 * @sw: console driver
3537 * Restore the console state to what it was before the kernel debugger
3541 * Zero on success, nonzero if a failure occurred when trying to restore
3544 int con_debug_leave(void)
3549 fg_console
= saved_fg_console
;
3550 last_console
= saved_last_console
;
3551 want_console
= saved_want_console
;
3552 console_blanked
= saved_console_blanked
;
3553 vc_cons
[fg_console
].d
->vc_mode
= saved_vc_mode
;
3555 vc
= vc_cons
[fg_console
].d
;
3556 if (vc
->vc_sw
->con_debug_leave
)
3557 ret
= vc
->vc_sw
->con_debug_leave(vc
);
3560 EXPORT_SYMBOL_GPL(con_debug_leave
);
3562 static int do_register_con_driver(const struct consw
*csw
, int first
, int last
)
3564 struct module
*owner
= csw
->owner
;
3565 struct con_driver
*con_driver
;
3569 WARN_CONSOLE_UNLOCKED();
3571 if (!try_module_get(owner
))
3574 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3575 con_driver
= ®istered_con_driver
[i
];
3577 /* already registered */
3578 if (con_driver
->con
== csw
)
3585 desc
= csw
->con_startup();
3592 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3593 con_driver
= ®istered_con_driver
[i
];
3595 if (con_driver
->con
== NULL
&&
3596 !(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
)) {
3597 con_driver
->con
= csw
;
3598 con_driver
->desc
= desc
;
3599 con_driver
->node
= i
;
3600 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3601 CON_DRIVER_FLAG_INIT
;
3602 con_driver
->first
= first
;
3603 con_driver
->last
= last
;
3613 device_create_with_groups(vtconsole_class
, NULL
,
3614 MKDEV(0, con_driver
->node
),
3615 con_driver
, con_dev_groups
,
3616 "vtcon%i", con_driver
->node
);
3617 if (IS_ERR(con_driver
->dev
)) {
3618 printk(KERN_WARNING
"Unable to create device for %s; "
3619 "errno = %ld\n", con_driver
->desc
,
3620 PTR_ERR(con_driver
->dev
));
3621 con_driver
->dev
= NULL
;
3623 vtconsole_init_device(con_driver
);
3633 * do_unregister_con_driver - unregister console driver from console layer
3634 * @csw: console driver
3636 * DESCRIPTION: All drivers that registers to the console layer must
3637 * call this function upon exit, or if the console driver is in a state
3638 * where it won't be able to handle console services, such as the
3639 * framebuffer console without loaded framebuffer drivers.
3641 * The driver must unbind first prior to unregistration.
3643 int do_unregister_con_driver(const struct consw
*csw
)
3647 /* cannot unregister a bound driver */
3648 if (con_is_bound(csw
))
3651 if (csw
== conswitchp
)
3654 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3655 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3657 if (con_driver
->con
== csw
) {
3659 * Defer the removal of the sysfs entries since that
3660 * will acquire the kernfs s_active lock and we can't
3661 * acquire this lock while holding the console lock:
3662 * the unbind sysfs entry imposes already the opposite
3663 * order. Reset con already here to prevent any later
3664 * lookup to succeed and mark this slot as zombie, so
3665 * it won't get reused until we complete the removal
3666 * in the deferred work.
3668 con_driver
->con
= NULL
;
3669 con_driver
->flag
= CON_DRIVER_FLAG_ZOMBIE
;
3670 schedule_work(&con_driver_unregister_work
);
3678 EXPORT_SYMBOL_GPL(do_unregister_con_driver
);
3680 static void con_driver_unregister_callback(struct work_struct
*ignored
)
3686 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3687 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3689 if (!(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
))
3694 vtconsole_deinit_device(con_driver
);
3695 device_destroy(vtconsole_class
, MKDEV(0, con_driver
->node
));
3699 if (WARN_ON_ONCE(con_driver
->con
))
3700 con_driver
->con
= NULL
;
3701 con_driver
->desc
= NULL
;
3702 con_driver
->dev
= NULL
;
3703 con_driver
->node
= 0;
3704 WARN_ON_ONCE(con_driver
->flag
!= CON_DRIVER_FLAG_ZOMBIE
);
3705 con_driver
->flag
= 0;
3706 con_driver
->first
= 0;
3707 con_driver
->last
= 0;
3714 * If we support more console drivers, this function is used
3715 * when a driver wants to take over some existing consoles
3716 * and become default driver for newly opened ones.
3718 * do_take_over_console is basically a register followed by unbind
3720 int do_take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3724 err
= do_register_con_driver(csw
, first
, last
);
3726 * If we get an busy error we still want to bind the console driver
3727 * and return success, as we may have unbound the console driver
3728 * but not unregistered it.
3733 do_bind_con_driver(csw
, first
, last
, deflt
);
3737 EXPORT_SYMBOL_GPL(do_take_over_console
);
3741 * give_up_console is a wrapper to unregister_con_driver. It will only
3742 * work if driver is fully unbound.
3744 void give_up_console(const struct consw
*csw
)
3747 do_unregister_con_driver(csw
);
3751 static int __init
vtconsole_class_init(void)
3755 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3756 if (IS_ERR(vtconsole_class
)) {
3757 printk(KERN_WARNING
"Unable to create vt console class; "
3758 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3759 vtconsole_class
= NULL
;
3762 /* Add system drivers to sysfs */
3763 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3764 struct con_driver
*con
= ®istered_con_driver
[i
];
3766 if (con
->con
&& !con
->dev
) {
3768 device_create_with_groups(vtconsole_class
, NULL
,
3769 MKDEV(0, con
->node
),
3770 con
, con_dev_groups
,
3771 "vtcon%i", con
->node
);
3773 if (IS_ERR(con
->dev
)) {
3774 printk(KERN_WARNING
"Unable to create "
3775 "device for %s; errno = %ld\n",
3776 con
->desc
, PTR_ERR(con
->dev
));
3779 vtconsole_init_device(con
);
3786 postcore_initcall(vtconsole_class_init
);
3794 static int set_vesa_blanking(char __user
*p
)
3798 if (get_user(mode
, p
+ 1))
3801 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3805 void do_blank_screen(int entering_gfx
)
3807 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3810 WARN_CONSOLE_UNLOCKED();
3812 if (console_blanked
) {
3813 if (blank_state
== blank_vesa_wait
) {
3814 blank_state
= blank_off
;
3815 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3820 /* entering graphics mode? */
3824 vc
->vc_sw
->con_blank(vc
, -1, 1);
3825 console_blanked
= fg_console
+ 1;
3826 blank_state
= blank_off
;
3831 if (blank_state
!= blank_normal_wait
)
3833 blank_state
= blank_off
;
3835 /* don't blank graphics */
3836 if (vc
->vc_mode
!= KD_TEXT
) {
3837 console_blanked
= fg_console
+ 1;
3842 del_timer_sync(&console_timer
);
3843 blank_timer_expired
= 0;
3846 /* In case we need to reset origin, blanking hook returns 1 */
3847 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3848 console_blanked
= fg_console
+ 1;
3852 if (console_blank_hook
&& console_blank_hook(1))
3855 if (vesa_off_interval
&& vesa_blank_mode
) {
3856 blank_state
= blank_vesa_wait
;
3857 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3859 vt_event_post(VT_EVENT_BLANK
, vc
->vc_num
, vc
->vc_num
);
3861 EXPORT_SYMBOL(do_blank_screen
);
3864 * Called by timer as well as from vt_console_driver
3866 void do_unblank_screen(int leaving_gfx
)
3870 /* This should now always be called from a "sane" (read: can schedule)
3871 * context for the sake of the low level drivers, except in the special
3872 * case of oops_in_progress
3874 if (!oops_in_progress
)
3877 WARN_CONSOLE_UNLOCKED();
3880 if (!console_blanked
)
3882 if (!vc_cons_allocated(fg_console
)) {
3884 pr_warn("unblank_screen: tty %d not allocated ??\n",
3888 vc
= vc_cons
[fg_console
].d
;
3889 /* Try to unblank in oops case too */
3890 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
3891 return; /* but leave console_blanked != 0 */
3893 if (blankinterval
) {
3894 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3895 blank_state
= blank_normal_wait
;
3898 console_blanked
= 0;
3899 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
) || vt_force_oops_output(vc
))
3900 /* Low-level driver cannot restore -> do it ourselves */
3902 if (console_blank_hook
)
3903 console_blank_hook(0);
3906 vt_event_post(VT_EVENT_UNBLANK
, vc
->vc_num
, vc
->vc_num
);
3908 EXPORT_SYMBOL(do_unblank_screen
);
3911 * This is called by the outside world to cause a forced unblank, mostly for
3912 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3913 * call it with 1 as an argument and so force a mode restore... that may kill
3914 * X or at least garbage the screen but would also make the Oops visible...
3916 void unblank_screen(void)
3918 do_unblank_screen(0);
3922 * We defer the timer blanking to work queue so it can take the console mutex
3923 * (console operations can still happen at irq time, but only from printk which
3924 * has the console mutex. Not perfect yet, but better than no locking
3926 static void blank_screen_t(unsigned long dummy
)
3928 if (unlikely(!keventd_up())) {
3929 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3932 blank_timer_expired
= 1;
3933 schedule_work(&console_work
);
3936 void poke_blanked_console(void)
3938 WARN_CONSOLE_UNLOCKED();
3940 /* Add this so we quickly catch whoever might call us in a non
3941 * safe context. Nowadays, unblank_screen() isn't to be called in
3942 * atomic contexts and is allowed to schedule (with the special case
3943 * of oops_in_progress, but that isn't of any concern for this
3948 /* This isn't perfectly race free, but a race here would be mostly harmless,
3949 * at worse, we'll do a spurrious blank and it's unlikely
3951 del_timer(&console_timer
);
3952 blank_timer_expired
= 0;
3954 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3956 if (console_blanked
)
3958 else if (blankinterval
) {
3959 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3960 blank_state
= blank_normal_wait
;
3968 static void set_palette(struct vc_data
*vc
)
3970 WARN_CONSOLE_UNLOCKED();
3972 if (vc
->vc_mode
!= KD_GRAPHICS
)
3973 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3977 * Load palette into the DAC registers. arg points to a colour
3978 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3981 int con_set_cmap(unsigned char __user
*arg
)
3984 unsigned char colormap
[3*16];
3986 if (copy_from_user(colormap
, arg
, sizeof(colormap
)))
3990 for (i
= k
= 0; i
< 16; i
++) {
3991 default_red
[i
] = colormap
[k
++];
3992 default_grn
[i
] = colormap
[k
++];
3993 default_blu
[i
] = colormap
[k
++];
3995 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3996 if (!vc_cons_allocated(i
))
3998 for (j
= k
= 0; j
< 16; j
++) {
3999 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
4000 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
4001 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
4003 set_palette(vc_cons
[i
].d
);
4010 int con_get_cmap(unsigned char __user
*arg
)
4013 unsigned char colormap
[3*16];
4016 for (i
= k
= 0; i
< 16; i
++) {
4017 colormap
[k
++] = default_red
[i
];
4018 colormap
[k
++] = default_grn
[i
];
4019 colormap
[k
++] = default_blu
[i
];
4023 if (copy_to_user(arg
, colormap
, sizeof(colormap
)))
4029 void reset_palette(struct vc_data
*vc
)
4032 for (j
=k
=0; j
<16; j
++) {
4033 vc
->vc_palette
[k
++] = default_red
[j
];
4034 vc
->vc_palette
[k
++] = default_grn
[j
];
4035 vc
->vc_palette
[k
++] = default_blu
[j
];
4043 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4044 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4045 * depending on width) reserved for each character which is kinda wasty, but
4046 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4047 * is up to the actual low-level console-driver convert data into its favorite
4048 * format (maybe we should add a `fontoffset' field to the `display'
4049 * structure so we won't have to convert the fontdata all the time.
4053 #define max_font_size 65536
4055 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
4057 struct console_font font
;
4062 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
4069 if (vc
->vc_mode
!= KD_TEXT
)
4071 else if (vc
->vc_sw
->con_font_get
)
4072 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
4080 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
4082 if (op
->data
&& font
.charcount
> op
->charcount
)
4084 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
4085 if (font
.width
> op
->width
|| font
.height
> op
->height
)
4088 if (font
.width
!= 8)
4090 else if ((op
->height
&& font
.height
> op
->height
) ||
4097 op
->height
= font
.height
;
4098 op
->width
= font
.width
;
4099 op
->charcount
= font
.charcount
;
4101 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
4109 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
4111 struct console_font font
;
4115 if (vc
->vc_mode
!= KD_TEXT
)
4119 if (op
->charcount
> 512)
4121 if (!op
->height
) { /* Need to guess font height [compat] */
4123 u8 __user
*charmap
= op
->data
;
4126 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4127 so that we can get rid of this soon */
4128 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
4130 for (h
= 32; h
> 0; h
--)
4131 for (i
= 0; i
< op
->charcount
; i
++) {
4132 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
4141 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
4143 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
4144 if (size
> max_font_size
)
4146 font
.charcount
= op
->charcount
;
4147 font
.height
= op
->height
;
4148 font
.width
= op
->width
;
4149 font
.data
= memdup_user(op
->data
, size
);
4150 if (IS_ERR(font
.data
))
4151 return PTR_ERR(font
.data
);
4153 if (vc
->vc_mode
!= KD_TEXT
)
4155 else if (vc
->vc_sw
->con_font_set
)
4156 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
4164 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
4166 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
4167 char name
[MAX_FONT_NAME
];
4174 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
4177 name
[MAX_FONT_NAME
- 1] = 0;
4180 if (vc
->vc_mode
!= KD_TEXT
) {
4184 if (vc
->vc_sw
->con_font_default
)
4185 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
4190 op
->width
= font
.width
;
4191 op
->height
= font
.height
;
4196 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
4198 int con
= op
->height
;
4203 if (vc
->vc_mode
!= KD_TEXT
)
4205 else if (!vc
->vc_sw
->con_font_copy
)
4207 else if (con
< 0 || !vc_cons_allocated(con
))
4209 else if (con
== vc
->vc_num
) /* nothing to do */
4212 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4217 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4220 case KD_FONT_OP_SET
:
4221 return con_font_set(vc
, op
);
4222 case KD_FONT_OP_GET
:
4223 return con_font_get(vc
, op
);
4224 case KD_FONT_OP_SET_DEFAULT
:
4225 return con_font_default(vc
, op
);
4226 case KD_FONT_OP_COPY
:
4227 return con_font_copy(vc
, op
);
4233 * Interface exported to selection and vcs.
4236 /* used by selection */
4237 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4239 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4242 if (w
& vc
->vc_hi_font_mask
)
4246 EXPORT_SYMBOL_GPL(screen_glyph
);
4248 /* used by vcs - note the word offset */
4249 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4251 return screenpos(vc
, 2 * w_offset
, viewed
);
4254 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4260 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4263 gotoxy(vc
, p
[0], p
[1]);
4267 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4269 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4270 return softcursor_original
;
4271 return scr_readw(org
);
4274 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4276 scr_writew(val
, org
);
4277 if ((unsigned long)org
== vc
->vc_pos
) {
4278 softcursor_original
= -1;
4283 void vcs_scr_updated(struct vc_data
*vc
)
4289 * Visible symbols for modules
4292 EXPORT_SYMBOL(color_table
);
4293 EXPORT_SYMBOL(default_red
);
4294 EXPORT_SYMBOL(default_grn
);
4295 EXPORT_SYMBOL(default_blu
);
4296 EXPORT_SYMBOL(update_region
);
4297 EXPORT_SYMBOL(redraw_screen
);
4298 EXPORT_SYMBOL(vc_resize
);
4299 EXPORT_SYMBOL(fg_console
);
4300 EXPORT_SYMBOL(console_blank_hook
);
4301 EXPORT_SYMBOL(console_blanked
);
4302 EXPORT_SYMBOL(vc_cons
);
4303 EXPORT_SYMBOL(global_cursor_default
);
4304 #ifndef VT_SINGLE_DRIVER
4305 EXPORT_SYMBOL(give_up_console
);