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 static inline bool con_is_fg(const struct vc_data
*vc
)
282 return vc
->vc_num
== fg_console
;
285 static inline bool con_should_update(const struct vc_data
*vc
)
287 return con_is_visible(vc
) && !console_blanked
;
290 static inline unsigned short *screenpos(struct vc_data
*vc
, int offset
, int viewed
)
295 p
= (unsigned short *)(vc
->vc_origin
+ offset
);
296 else if (!vc
->vc_sw
->con_screen_pos
)
297 p
= (unsigned short *)(vc
->vc_visible_origin
+ offset
);
299 p
= vc
->vc_sw
->con_screen_pos(vc
, offset
);
303 /* Called from the keyboard irq path.. */
304 static inline void scrolldelta(int lines
)
307 /* scrolldelta needs some kind of consistency lock, but the BKL was
308 and still is not protecting versus the scheduled back end */
309 scrollback_delta
+= lines
;
310 schedule_console_callback();
313 void schedule_console_callback(void)
315 schedule_work(&console_work
);
318 static void scrup(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
320 unsigned short *d
, *s
;
324 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
326 if (con_is_visible(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_UP
, nr
))
328 d
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
329 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* (t
+ nr
));
330 scr_memmovew(d
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
331 scr_memsetw(d
+ (b
- t
- nr
) * vc
->vc_cols
, vc
->vc_video_erase_char
,
332 vc
->vc_size_row
* nr
);
335 static void scrdown(struct vc_data
*vc
, unsigned int t
, unsigned int b
, int nr
)
342 if (b
> vc
->vc_rows
|| t
>= b
|| nr
< 1)
344 if (con_is_visible(vc
) && vc
->vc_sw
->con_scroll(vc
, t
, b
, SM_DOWN
, nr
))
346 s
= (unsigned short *)(vc
->vc_origin
+ vc
->vc_size_row
* t
);
347 step
= vc
->vc_cols
* nr
;
348 scr_memmovew(s
+ step
, s
, (b
- t
- nr
) * vc
->vc_size_row
);
349 scr_memsetw(s
, vc
->vc_video_erase_char
, 2 * step
);
352 static void do_update_region(struct vc_data
*vc
, unsigned long start
, int count
)
354 unsigned int xx
, yy
, offset
;
358 if (!vc
->vc_sw
->con_getxy
) {
359 offset
= (start
- vc
->vc_origin
) / 2;
360 xx
= offset
% vc
->vc_cols
;
361 yy
= offset
/ vc
->vc_cols
;
364 start
= vc
->vc_sw
->con_getxy(vc
, start
, &nxx
, &nyy
);
368 u16 attrib
= scr_readw(p
) & 0xff00;
371 while (xx
< vc
->vc_cols
&& count
) {
372 if (attrib
!= (scr_readw(p
) & 0xff00)) {
374 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
377 attrib
= scr_readw(p
) & 0xff00;
384 vc
->vc_sw
->con_putcs(vc
, q
, p
-q
, yy
, startx
);
389 if (vc
->vc_sw
->con_getxy
) {
391 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();
400 if (con_should_update(vc
)) {
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
);
417 * ++roman: I completely changed the attribute format for monochrome
418 * mode (!can_do_color). The formerly used MDA (monochrome display
419 * adapter) format didn't allow the combination of certain effects.
420 * Now the attribute is just a bit vector:
421 * Bit 0..1: intensity (0..2)
428 if (!vc
->vc_can_do_color
)
431 (_underline
? 4 : 0) |
435 a
= (a
& 0xF0) | vc
->vc_itcolor
;
437 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
438 else if (_intensity
== 0)
439 a
= (a
& 0xf0) | vc
->vc_ulcolor
;
441 a
= ((a
) & 0x88) | ((((a
) >> 4) | ((a
) << 4)) & 0x77);
446 if (vc
->vc_hi_font_mask
== 0x100)
452 static void update_attr(struct vc_data
*vc
)
454 vc
->vc_attr
= build_attr(vc
, vc
->vc_color
, vc
->vc_intensity
,
455 vc
->vc_blink
, vc
->vc_underline
,
456 vc
->vc_reverse
^ vc
->vc_decscnm
, vc
->vc_italic
);
457 vc
->vc_video_erase_char
= (build_attr(vc
, vc
->vc_color
, 1, vc
->vc_blink
, 0, vc
->vc_decscnm
, 0) << 8) | ' ';
460 /* Note: inverting the screen twice should revert to the original state */
461 void invert_screen(struct vc_data
*vc
, int offset
, int count
, int viewed
)
465 WARN_CONSOLE_UNLOCKED();
468 p
= screenpos(vc
, offset
, viewed
);
469 if (vc
->vc_sw
->con_invert_region
) {
470 vc
->vc_sw
->con_invert_region(vc
, p
, count
);
476 if (!vc
->vc_can_do_color
) {
483 } else if (vc
->vc_hi_font_mask
== 0x100) {
486 a
= ((a
) & 0x11ff) | (((a
) & 0xe000) >> 4) | (((a
) & 0x0e00) << 4);
493 a
= ((a
) & 0x88ff) | (((a
) & 0x7000) >> 4) | (((a
) & 0x0700) << 4);
500 if (con_should_update(vc
))
501 do_update_region(vc
, (unsigned long) p
, count
);
505 /* used by selection: complement pointer position */
506 void complement_pos(struct vc_data
*vc
, int offset
)
508 static int old_offset
= -1;
509 static unsigned short old
;
510 static unsigned short oldx
, oldy
;
512 WARN_CONSOLE_UNLOCKED();
514 if (old_offset
!= -1 && old_offset
>= 0 &&
515 old_offset
< vc
->vc_screenbuf_size
) {
516 scr_writew(old
, screenpos(vc
, old_offset
, 1));
517 if (con_should_update(vc
))
518 vc
->vc_sw
->con_putc(vc
, old
, oldy
, oldx
);
524 if (offset
!= -1 && offset
>= 0 &&
525 offset
< vc
->vc_screenbuf_size
) {
528 p
= screenpos(vc
, offset
, 1);
530 new = old
^ vc
->vc_complement_mask
;
532 if (con_should_update(vc
)) {
533 oldx
= (offset
>> 1) % vc
->vc_cols
;
534 oldy
= (offset
>> 1) / vc
->vc_cols
;
535 vc
->vc_sw
->con_putc(vc
, new, oldy
, oldx
);
541 static void insert_char(struct vc_data
*vc
, unsigned int nr
)
543 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
545 scr_memmovew(p
+ nr
, p
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
546 scr_memsetw(p
, vc
->vc_video_erase_char
, nr
* 2);
547 vc
->vc_need_wrap
= 0;
548 if (con_should_update(vc
))
549 do_update_region(vc
, (unsigned long) p
,
550 vc
->vc_cols
- vc
->vc_x
);
553 static void delete_char(struct vc_data
*vc
, unsigned int nr
)
555 unsigned short *p
= (unsigned short *) vc
->vc_pos
;
557 scr_memcpyw(p
, p
+ nr
, (vc
->vc_cols
- vc
->vc_x
- nr
) * 2);
558 scr_memsetw(p
+ vc
->vc_cols
- vc
->vc_x
- nr
, vc
->vc_video_erase_char
,
560 vc
->vc_need_wrap
= 0;
561 if (con_should_update(vc
))
562 do_update_region(vc
, (unsigned long) p
,
563 vc
->vc_cols
- vc
->vc_x
);
566 static int softcursor_original
= -1;
568 static void add_softcursor(struct vc_data
*vc
)
570 int i
= scr_readw((u16
*) vc
->vc_pos
);
571 u32 type
= vc
->vc_cursor_type
;
573 if (! (type
& 0x10)) return;
574 if (softcursor_original
!= -1) return;
575 softcursor_original
= i
;
576 i
|= ((type
>> 8) & 0xff00 );
577 i
^= ((type
) & 0xff00 );
578 if ((type
& 0x20) && ((softcursor_original
& 0x7000) == (i
& 0x7000))) i
^= 0x7000;
579 if ((type
& 0x40) && ((i
& 0x700) == ((i
& 0x7000) >> 4))) i
^= 0x0700;
580 scr_writew(i
, (u16
*) vc
->vc_pos
);
581 if (con_should_update(vc
))
582 vc
->vc_sw
->con_putc(vc
, i
, vc
->vc_y
, vc
->vc_x
);
585 static void hide_softcursor(struct vc_data
*vc
)
587 if (softcursor_original
!= -1) {
588 scr_writew(softcursor_original
, (u16
*)vc
->vc_pos
);
589 if (con_should_update(vc
))
590 vc
->vc_sw
->con_putc(vc
, softcursor_original
,
592 softcursor_original
= -1;
596 static void hide_cursor(struct vc_data
*vc
)
600 vc
->vc_sw
->con_cursor(vc
, CM_ERASE
);
604 static void set_cursor(struct vc_data
*vc
)
606 if (!con_is_fg(vc
) || console_blanked
|| vc
->vc_mode
== KD_GRAPHICS
)
612 if ((vc
->vc_cursor_type
& 0x0f) != 1)
613 vc
->vc_sw
->con_cursor(vc
, CM_DRAW
);
618 static void set_origin(struct vc_data
*vc
)
620 WARN_CONSOLE_UNLOCKED();
622 if (!con_is_visible(vc
) ||
623 !vc
->vc_sw
->con_set_origin
||
624 !vc
->vc_sw
->con_set_origin(vc
))
625 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
626 vc
->vc_visible_origin
= vc
->vc_origin
;
627 vc
->vc_scr_end
= vc
->vc_origin
+ vc
->vc_screenbuf_size
;
628 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_size_row
* vc
->vc_y
+ 2 * vc
->vc_x
;
631 static void save_screen(struct vc_data
*vc
)
633 WARN_CONSOLE_UNLOCKED();
635 if (vc
->vc_sw
->con_save_screen
)
636 vc
->vc_sw
->con_save_screen(vc
);
640 * Redrawing of screen
643 void clear_buffer_attributes(struct vc_data
*vc
)
645 unsigned short *p
= (unsigned short *)vc
->vc_origin
;
646 int count
= vc
->vc_screenbuf_size
/ 2;
647 int mask
= vc
->vc_hi_font_mask
| 0xff;
649 for (; count
> 0; count
--, p
++) {
650 scr_writew((scr_readw(p
)&mask
) | (vc
->vc_video_erase_char
& ~mask
), p
);
654 void redraw_screen(struct vc_data
*vc
, int is_switch
)
658 WARN_CONSOLE_UNLOCKED();
662 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
667 struct vc_data
*old_vc
= vc_cons
[fg_console
].d
;
670 if (!con_is_visible(vc
))
672 *vc
->vc_display_fg
= vc
;
673 fg_console
= vc
->vc_num
;
675 if (!con_is_visible(old_vc
)) {
680 sysfs_notify(&tty0dev
->kobj
, NULL
, "active");
688 int old_was_color
= vc
->vc_can_do_color
;
691 update
= vc
->vc_sw
->con_switch(vc
);
694 * If console changed from mono<->color, the best we can do
695 * is to clear the buffer attributes. As it currently stands,
696 * rebuilding new attributes from the old buffer is not doable
697 * without overly complex code.
699 if (old_was_color
!= vc
->vc_can_do_color
) {
701 clear_buffer_attributes(vc
);
704 /* Forcibly update if we're panicing */
705 if ((update
&& vc
->vc_mode
!= KD_GRAPHICS
) ||
706 vt_force_oops_output(vc
))
707 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
712 compute_shiftstate();
718 * Allocation, freeing and resizing of VTs.
721 int vc_cons_allocated(unsigned int i
)
723 return (i
< MAX_NR_CONSOLES
&& vc_cons
[i
].d
);
726 static void visual_init(struct vc_data
*vc
, int num
, int init
)
728 /* ++Geert: vc->vc_sw->con_init determines console size */
730 module_put(vc
->vc_sw
->owner
);
731 vc
->vc_sw
= conswitchp
;
732 #ifndef VT_SINGLE_DRIVER
733 if (con_driver_map
[num
])
734 vc
->vc_sw
= con_driver_map
[num
];
736 __module_get(vc
->vc_sw
->owner
);
738 vc
->vc_display_fg
= &master_display_fg
;
739 if (vc
->vc_uni_pagedir_loc
)
741 vc
->vc_uni_pagedir_loc
= &vc
->vc_uni_pagedir
;
742 vc
->vc_uni_pagedir
= NULL
;
743 vc
->vc_hi_font_mask
= 0;
744 vc
->vc_complement_mask
= 0;
745 vc
->vc_can_do_color
= 0;
746 vc
->vc_panic_force_write
= false;
747 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
748 vc
->vc_sw
->con_init(vc
, init
);
749 if (!vc
->vc_complement_mask
)
750 vc
->vc_complement_mask
= vc
->vc_can_do_color
? 0x7700 : 0x0800;
751 vc
->vc_s_complement_mask
= vc
->vc_complement_mask
;
752 vc
->vc_size_row
= vc
->vc_cols
<< 1;
753 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
756 int vc_allocate(unsigned int currcons
) /* return 0 on success */
758 struct vt_notifier_param param
;
761 WARN_CONSOLE_UNLOCKED();
763 if (currcons
>= MAX_NR_CONSOLES
)
766 if (vc_cons
[currcons
].d
)
769 /* due to the granularity of kmalloc, we waste some memory here */
770 /* the alloc is done in two steps, to optimize the common situation
771 of a 25x80 console (structsize=216, screenbuf_size=4000) */
772 /* although the numbers above are not valid since long ago, the
773 point is still up-to-date and the comment still has its value
774 even if only as a historical artifact. --mj, July 1998 */
775 param
.vc
= vc
= kzalloc(sizeof(struct vc_data
), GFP_KERNEL
);
779 vc_cons
[currcons
].d
= vc
;
780 tty_port_init(&vc
->port
);
781 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
783 visual_init(vc
, currcons
, 1);
785 if (!*vc
->vc_uni_pagedir_loc
)
786 con_set_default_unimap(vc
);
788 vc
->vc_screenbuf
= kmalloc(vc
->vc_screenbuf_size
, GFP_KERNEL
);
789 if (!vc
->vc_screenbuf
)
792 /* If no drivers have overridden us and the user didn't pass a
793 boot option, default to displaying the cursor */
794 if (global_cursor_default
== -1)
795 global_cursor_default
= 1;
797 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
, 1);
798 vcs_make_sysfs(currcons
);
799 atomic_notifier_call_chain(&vt_notifier_list
, VT_ALLOCATE
, ¶m
);
804 vc_cons
[currcons
].d
= NULL
;
808 static inline int resize_screen(struct vc_data
*vc
, int width
, int height
,
811 /* Resizes the resolution of the display adapater */
814 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_resize
)
815 err
= vc
->vc_sw
->con_resize(vc
, width
, height
, user
);
821 * Change # of rows and columns (0 means unchanged/the size of fg_console)
822 * [this is to be used together with some user program
823 * like resize that changes the hardware videomode]
825 #define VC_RESIZE_MAXCOL (32767)
826 #define VC_RESIZE_MAXROW (32767)
829 * vc_do_resize - resizing method for the tty
830 * @tty: tty being resized
831 * @real_tty: real tty (different to tty if a pty/tty pair)
832 * @vc: virtual console private data
836 * Resize a virtual console, clipping according to the actual constraints.
837 * If the caller passes a tty structure then update the termios winsize
838 * information and perform any necessary signal handling.
840 * Caller must hold the console semaphore. Takes the termios rwsem and
841 * ctrl_lock of the tty IFF a tty is passed.
844 static int vc_do_resize(struct tty_struct
*tty
, struct vc_data
*vc
,
845 unsigned int cols
, unsigned int lines
)
847 unsigned long old_origin
, new_origin
, new_scr_end
, rlth
, rrem
, err
= 0;
849 unsigned int old_rows
, old_row_size
;
850 unsigned int new_cols
, new_rows
, new_row_size
, new_screen_size
;
852 unsigned short *newscreen
;
854 WARN_CONSOLE_UNLOCKED();
859 user
= vc
->vc_resize_user
;
860 vc
->vc_resize_user
= 0;
862 if (cols
> VC_RESIZE_MAXCOL
|| lines
> VC_RESIZE_MAXROW
)
865 new_cols
= (cols
? cols
: vc
->vc_cols
);
866 new_rows
= (lines
? lines
: vc
->vc_rows
);
867 new_row_size
= new_cols
<< 1;
868 new_screen_size
= new_row_size
* new_rows
;
870 if (new_cols
== vc
->vc_cols
&& new_rows
== vc
->vc_rows
)
873 if (new_screen_size
> (4 << 20))
875 newscreen
= kmalloc(new_screen_size
, GFP_USER
);
882 old_rows
= vc
->vc_rows
;
883 old_row_size
= vc
->vc_size_row
;
885 err
= resize_screen(vc
, new_cols
, new_rows
, user
);
891 vc
->vc_rows
= new_rows
;
892 vc
->vc_cols
= new_cols
;
893 vc
->vc_size_row
= new_row_size
;
894 vc
->vc_screenbuf_size
= new_screen_size
;
896 rlth
= min(old_row_size
, new_row_size
);
897 rrem
= new_row_size
- rlth
;
898 old_origin
= vc
->vc_origin
;
899 new_origin
= (long) newscreen
;
900 new_scr_end
= new_origin
+ new_screen_size
;
902 if (vc
->vc_y
> new_rows
) {
903 if (old_rows
- vc
->vc_y
< new_rows
) {
905 * Cursor near the bottom, copy contents from the
908 old_origin
+= (old_rows
- new_rows
) * old_row_size
;
911 * Cursor is in no man's land, copy 1/2 screenful
912 * from the top and bottom of cursor position
914 old_origin
+= (vc
->vc_y
- new_rows
/2) * old_row_size
;
918 end
= old_origin
+ old_row_size
* min(old_rows
, new_rows
);
922 while (old_origin
< end
) {
923 scr_memcpyw((unsigned short *) new_origin
,
924 (unsigned short *) old_origin
, rlth
);
926 scr_memsetw((void *)(new_origin
+ rlth
),
927 vc
->vc_video_erase_char
, rrem
);
928 old_origin
+= old_row_size
;
929 new_origin
+= new_row_size
;
931 if (new_scr_end
> new_origin
)
932 scr_memsetw((void *)new_origin
, vc
->vc_video_erase_char
,
933 new_scr_end
- new_origin
);
934 kfree(vc
->vc_screenbuf
);
935 vc
->vc_screenbuf
= newscreen
;
936 vc
->vc_screenbuf_size
= new_screen_size
;
939 /* do part of a reset_terminal() */
941 vc
->vc_bottom
= vc
->vc_rows
;
942 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
946 /* Rewrite the requested winsize data with the actual
949 memset(&ws
, 0, sizeof(ws
));
950 ws
.ws_row
= vc
->vc_rows
;
951 ws
.ws_col
= vc
->vc_cols
;
952 ws
.ws_ypixel
= vc
->vc_scan_lines
;
953 tty_do_resize(tty
, &ws
);
956 if (con_is_visible(vc
))
958 vt_event_post(VT_EVENT_RESIZE
, vc
->vc_num
, vc
->vc_num
);
963 * vc_resize - resize a VT
964 * @vc: virtual console
968 * Resize a virtual console as seen from the console end of things. We
969 * use the common vc_do_resize methods to update the structures. The
970 * caller must hold the console sem to protect console internals and
974 int vc_resize(struct vc_data
*vc
, unsigned int cols
, unsigned int rows
)
976 return vc_do_resize(vc
->port
.tty
, vc
, cols
, rows
);
980 * vt_resize - resize a VT
981 * @tty: tty to resize
982 * @ws: winsize attributes
984 * Resize a virtual terminal. This is called by the tty layer as we
985 * register our own handler for resizing. The mutual helper does all
988 * Takes the console sem and the called methods then take the tty
989 * termios_rwsem and the tty ctrl_lock in that order.
991 static int vt_resize(struct tty_struct
*tty
, struct winsize
*ws
)
993 struct vc_data
*vc
= tty
->driver_data
;
997 ret
= vc_do_resize(tty
, vc
, ws
->ws_col
, ws
->ws_row
);
1002 struct vc_data
*vc_deallocate(unsigned int currcons
)
1004 struct vc_data
*vc
= NULL
;
1006 WARN_CONSOLE_UNLOCKED();
1008 if (vc_cons_allocated(currcons
)) {
1009 struct vt_notifier_param param
;
1011 param
.vc
= vc
= vc_cons
[currcons
].d
;
1012 atomic_notifier_call_chain(&vt_notifier_list
, VT_DEALLOCATE
, ¶m
);
1013 vcs_remove_sysfs(currcons
);
1014 vc
->vc_sw
->con_deinit(vc
);
1015 put_pid(vc
->vt_pid
);
1016 module_put(vc
->vc_sw
->owner
);
1017 kfree(vc
->vc_screenbuf
);
1018 vc_cons
[currcons
].d
= NULL
;
1027 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
1028 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
1029 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
1031 #define decarm VC_REPEAT
1032 #define decckm VC_CKMODE
1033 #define kbdapplic VC_APPLIC
1037 * this is what the terminal answers to a ESC-Z or csi0c query.
1039 #define VT100ID "\033[?1;2c"
1040 #define VT102ID "\033[?6c"
1042 const unsigned char color_table
[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1043 8,12,10,14, 9,13,11,15 };
1045 /* the default colour table, for VGA+ colour systems */
1046 unsigned char default_red
[] = {
1047 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa,
1048 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
1050 module_param_array(default_red
, byte
, NULL
, S_IRUGO
| S_IWUSR
);
1052 unsigned char default_grn
[] = {
1053 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
1054 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
1056 module_param_array(default_grn
, byte
, NULL
, S_IRUGO
| S_IWUSR
);
1058 unsigned char default_blu
[] = {
1059 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
1060 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
1062 module_param_array(default_blu
, byte
, NULL
, S_IRUGO
| S_IWUSR
);
1065 * gotoxy() must verify all boundaries, because the arguments
1066 * might also be negative. If the given position is out of
1067 * bounds, the cursor is placed at the nearest margin.
1069 static void gotoxy(struct vc_data
*vc
, int new_x
, int new_y
)
1076 if (new_x
>= vc
->vc_cols
)
1077 vc
->vc_x
= vc
->vc_cols
- 1;
1084 max_y
= vc
->vc_bottom
;
1087 max_y
= vc
->vc_rows
;
1091 else if (new_y
>= max_y
)
1092 vc
->vc_y
= max_y
- 1;
1095 vc
->vc_pos
= vc
->vc_origin
+ vc
->vc_y
* vc
->vc_size_row
+ (vc
->vc_x
<<1);
1096 vc
->vc_need_wrap
= 0;
1099 /* for absolute user moves, when decom is set */
1100 static void gotoxay(struct vc_data
*vc
, int new_x
, int new_y
)
1102 gotoxy(vc
, new_x
, vc
->vc_decom
? (vc
->vc_top
+ new_y
) : new_y
);
1105 void scrollback(struct vc_data
*vc
)
1107 scrolldelta(-(vc
->vc_rows
/ 2));
1110 void scrollfront(struct vc_data
*vc
, int lines
)
1113 lines
= vc
->vc_rows
/ 2;
1117 static void lf(struct vc_data
*vc
)
1119 /* don't scroll if above bottom of scrolling region, or
1120 * if below scrolling region
1122 if (vc
->vc_y
+ 1 == vc
->vc_bottom
)
1123 scrup(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1124 else if (vc
->vc_y
< vc
->vc_rows
- 1) {
1126 vc
->vc_pos
+= vc
->vc_size_row
;
1128 vc
->vc_need_wrap
= 0;
1129 notify_write(vc
, '\n');
1132 static void ri(struct vc_data
*vc
)
1134 /* don't scroll if below top of scrolling region, or
1135 * if above scrolling region
1137 if (vc
->vc_y
== vc
->vc_top
)
1138 scrdown(vc
, vc
->vc_top
, vc
->vc_bottom
, 1);
1139 else if (vc
->vc_y
> 0) {
1141 vc
->vc_pos
-= vc
->vc_size_row
;
1143 vc
->vc_need_wrap
= 0;
1146 static inline void cr(struct vc_data
*vc
)
1148 vc
->vc_pos
-= vc
->vc_x
<< 1;
1149 vc
->vc_need_wrap
= vc
->vc_x
= 0;
1150 notify_write(vc
, '\r');
1153 static inline void bs(struct vc_data
*vc
)
1158 vc
->vc_need_wrap
= 0;
1159 notify_write(vc
, '\b');
1163 static inline void del(struct vc_data
*vc
)
1168 static void csi_J(struct vc_data
*vc
, int vpar
)
1171 unsigned short * start
;
1174 case 0: /* erase from cursor to end of display */
1175 count
= (vc
->vc_scr_end
- vc
->vc_pos
) >> 1;
1176 start
= (unsigned short *)vc
->vc_pos
;
1178 case 1: /* erase from start to cursor */
1179 count
= ((vc
->vc_pos
- vc
->vc_origin
) >> 1) + 1;
1180 start
= (unsigned short *)vc
->vc_origin
;
1182 case 3: /* erase scroll-back buffer (and whole display) */
1183 scr_memsetw(vc
->vc_screenbuf
, vc
->vc_video_erase_char
,
1184 vc
->vc_screenbuf_size
);
1186 if (con_is_visible(vc
))
1189 case 2: /* erase whole display */
1190 count
= vc
->vc_cols
* vc
->vc_rows
;
1191 start
= (unsigned short *)vc
->vc_origin
;
1196 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1197 if (con_should_update(vc
))
1198 do_update_region(vc
, (unsigned long) start
, count
);
1199 vc
->vc_need_wrap
= 0;
1202 static void csi_K(struct vc_data
*vc
, int vpar
)
1205 unsigned short * start
;
1208 case 0: /* erase from cursor to end of line */
1209 count
= vc
->vc_cols
- vc
->vc_x
;
1210 start
= (unsigned short *)vc
->vc_pos
;
1212 case 1: /* erase from start of line to cursor */
1213 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1214 count
= vc
->vc_x
+ 1;
1216 case 2: /* erase whole line */
1217 start
= (unsigned short *)(vc
->vc_pos
- (vc
->vc_x
<< 1));
1218 count
= vc
->vc_cols
;
1223 scr_memsetw(start
, vc
->vc_video_erase_char
, 2 * count
);
1224 vc
->vc_need_wrap
= 0;
1225 if (con_should_update(vc
))
1226 do_update_region(vc
, (unsigned long) start
, count
);
1229 static void csi_X(struct vc_data
*vc
, int vpar
) /* erase the following vpar positions */
1235 count
= (vpar
> vc
->vc_cols
- vc
->vc_x
) ? (vc
->vc_cols
- vc
->vc_x
) : vpar
;
1237 scr_memsetw((unsigned short *)vc
->vc_pos
, vc
->vc_video_erase_char
, 2 * count
);
1238 if (con_should_update(vc
))
1239 vc
->vc_sw
->con_clear(vc
, vc
->vc_y
, vc
->vc_x
, 1, count
);
1240 vc
->vc_need_wrap
= 0;
1243 static void default_attr(struct vc_data
*vc
)
1245 vc
->vc_intensity
= 1;
1247 vc
->vc_underline
= 0;
1250 vc
->vc_color
= vc
->vc_def_color
;
1253 struct rgb
{ u8 r
; u8 g
; u8 b
; };
1255 static void rgb_from_256(int i
, struct rgb
*c
)
1257 if (i
< 8) { /* Standard colours. */
1258 c
->r
= i
&1 ? 0xaa : 0x00;
1259 c
->g
= i
&2 ? 0xaa : 0x00;
1260 c
->b
= i
&4 ? 0xaa : 0x00;
1261 } else if (i
< 16) {
1262 c
->r
= i
&1 ? 0xff : 0x55;
1263 c
->g
= i
&2 ? 0xff : 0x55;
1264 c
->b
= i
&4 ? 0xff : 0x55;
1265 } else if (i
< 232) { /* 6x6x6 colour cube. */
1266 c
->r
= (i
- 16) / 36 * 85 / 2;
1267 c
->g
= (i
- 16) / 6 % 6 * 85 / 2;
1268 c
->b
= (i
- 16) % 6 * 85 / 2;
1269 } else /* Grayscale ramp. */
1270 c
->r
= c
->g
= c
->b
= i
* 10 - 2312;
1273 static void rgb_foreground(struct vc_data
*vc
, const struct rgb
*c
)
1275 u8 hue
= 0, max
= max3(c
->r
, c
->g
, c
->b
);
1284 if (hue
== 7 && max
<= 0x55) {
1286 vc
->vc_intensity
= 2;
1287 } else if (max
> 0xaa)
1288 vc
->vc_intensity
= 2;
1290 vc
->vc_intensity
= 1;
1292 vc
->vc_color
= (vc
->vc_color
& 0xf0) | hue
;
1295 static void rgb_background(struct vc_data
*vc
, const struct rgb
*c
)
1297 /* For backgrounds, err on the dark side. */
1298 vc
->vc_color
= (vc
->vc_color
& 0x0f)
1299 | (c
->r
&0x80) >> 1 | (c
->g
&0x80) >> 2 | (c
->b
&0x80) >> 3;
1303 * ITU T.416 Higher colour modes. They break the usual properties of SGR codes
1304 * and thus need to be detected and ignored by hand. Strictly speaking, that
1305 * standard also wants : rather than ; as separators, contrary to ECMA-48, but
1306 * no one produces such codes and almost no one accepts them.
1308 * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in
1311 static int vc_t416_color(struct vc_data
*vc
, int i
,
1312 void(*set_color
)(struct vc_data
*vc
, const struct rgb
*c
))
1317 if (i
> vc
->vc_npar
)
1320 if (vc
->vc_par
[i
] == 5 && i
+ 1 <= vc
->vc_npar
) {
1323 rgb_from_256(vc
->vc_par
[i
], &c
);
1324 } else if (vc
->vc_par
[i
] == 2 && i
+ 3 <= vc
->vc_npar
) {
1326 c
.r
= vc
->vc_par
[i
+ 1];
1327 c
.g
= vc
->vc_par
[i
+ 2];
1328 c
.b
= vc
->vc_par
[i
+ 3];
1338 /* console_lock is held */
1339 static void csi_m(struct vc_data
*vc
)
1343 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1344 switch (vc
->vc_par
[i
]) {
1345 case 0: /* all attributes off */
1349 vc
->vc_intensity
= 2;
1352 vc
->vc_intensity
= 0;
1358 vc
->vc_underline
= 1;
1366 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1367 * Select primary font, don't display control chars if
1368 * defined, don't set bit 8 on output.
1370 vc
->vc_translate
= set_translate(vc
->vc_charset
== 0
1372 : vc
->vc_G1_charset
, vc
);
1373 vc
->vc_disp_ctrl
= 0;
1374 vc
->vc_toggle_meta
= 0;
1376 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1377 * Select first alternate font, lets chars < 32 be
1378 * displayed as ROM chars.
1380 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1381 vc
->vc_disp_ctrl
= 1;
1382 vc
->vc_toggle_meta
= 0;
1384 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1385 * Select second alternate font, toggle high bit
1386 * before displaying as ROM char.
1388 vc
->vc_translate
= set_translate(IBMPC_MAP
, vc
);
1389 vc
->vc_disp_ctrl
= 1;
1390 vc
->vc_toggle_meta
= 1;
1394 vc
->vc_intensity
= 1;
1400 vc
->vc_underline
= 0;
1409 i
= vc_t416_color(vc
, i
, rgb_foreground
);
1412 i
= vc_t416_color(vc
, i
, rgb_background
);
1415 vc
->vc_color
= (vc
->vc_def_color
& 0x0f) |
1416 (vc
->vc_color
& 0xf0);
1419 vc
->vc_color
= (vc
->vc_def_color
& 0xf0) |
1420 (vc
->vc_color
& 0x0f);
1423 if (vc
->vc_par
[i
] >= 90 && vc
->vc_par
[i
] <= 107) {
1424 if (vc
->vc_par
[i
] < 100)
1425 vc
->vc_intensity
= 2;
1426 vc
->vc_par
[i
] -= 60;
1428 if (vc
->vc_par
[i
] >= 30 && vc
->vc_par
[i
] <= 37)
1429 vc
->vc_color
= color_table
[vc
->vc_par
[i
] - 30]
1430 | (vc
->vc_color
& 0xf0);
1431 else if (vc
->vc_par
[i
] >= 40 && vc
->vc_par
[i
] <= 47)
1432 vc
->vc_color
= (color_table
[vc
->vc_par
[i
] - 40] << 4)
1433 | (vc
->vc_color
& 0x0f);
1439 static void respond_string(const char *p
, struct tty_port
*port
)
1442 tty_insert_flip_char(port
, *p
, 0);
1445 tty_schedule_flip(port
);
1448 static void cursor_report(struct vc_data
*vc
, struct tty_struct
*tty
)
1452 sprintf(buf
, "\033[%d;%dR", vc
->vc_y
+ (vc
->vc_decom
? vc
->vc_top
+ 1 : 1), vc
->vc_x
+ 1);
1453 respond_string(buf
, tty
->port
);
1456 static inline void status_report(struct tty_struct
*tty
)
1458 respond_string("\033[0n", tty
->port
); /* Terminal ok */
1461 static inline void respond_ID(struct tty_struct
*tty
)
1463 respond_string(VT102ID
, tty
->port
);
1466 void mouse_report(struct tty_struct
*tty
, int butt
, int mrx
, int mry
)
1470 sprintf(buf
, "\033[M%c%c%c", (char)(' ' + butt
), (char)('!' + mrx
),
1472 respond_string(buf
, tty
->port
);
1475 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1476 int mouse_reporting(void)
1478 return vc_cons
[fg_console
].d
->vc_report_mouse
;
1481 /* console_lock is held */
1482 static void set_mode(struct vc_data
*vc
, int on_off
)
1486 for (i
= 0; i
<= vc
->vc_npar
; i
++)
1488 switch(vc
->vc_par
[i
]) { /* DEC private modes set/reset */
1489 case 1: /* Cursor keys send ^[Ox/^[[x */
1491 set_kbd(vc
, decckm
);
1493 clr_kbd(vc
, decckm
);
1495 case 3: /* 80/132 mode switch unimplemented */
1497 vc_resize(deccolm
? 132 : 80, vc
->vc_rows
);
1498 /* this alone does not suffice; some user mode
1499 utility has to change the hardware regs */
1502 case 5: /* Inverted screen on/off */
1503 if (vc
->vc_decscnm
!= on_off
) {
1504 vc
->vc_decscnm
= on_off
;
1505 invert_screen(vc
, 0, vc
->vc_screenbuf_size
, 0);
1509 case 6: /* Origin relative/absolute */
1510 vc
->vc_decom
= on_off
;
1513 case 7: /* Autowrap on/off */
1514 vc
->vc_decawm
= on_off
;
1516 case 8: /* Autorepeat on/off */
1518 set_kbd(vc
, decarm
);
1520 clr_kbd(vc
, decarm
);
1523 vc
->vc_report_mouse
= on_off
? 1 : 0;
1525 case 25: /* Cursor on/off */
1526 vc
->vc_deccm
= on_off
;
1529 vc
->vc_report_mouse
= on_off
? 2 : 0;
1533 switch(vc
->vc_par
[i
]) { /* ANSI modes set/reset */
1534 case 3: /* Monitor (display ctrls) */
1535 vc
->vc_disp_ctrl
= on_off
;
1537 case 4: /* Insert Mode on/off */
1538 vc
->vc_decim
= on_off
;
1540 case 20: /* Lf, Enter == CrLf/Lf */
1550 /* console_lock is held */
1551 static void setterm_command(struct vc_data
*vc
)
1553 switch(vc
->vc_par
[0]) {
1554 case 1: /* set color for underline mode */
1555 if (vc
->vc_can_do_color
&&
1556 vc
->vc_par
[1] < 16) {
1557 vc
->vc_ulcolor
= color_table
[vc
->vc_par
[1]];
1558 if (vc
->vc_underline
)
1562 case 2: /* set color for half intensity mode */
1563 if (vc
->vc_can_do_color
&&
1564 vc
->vc_par
[1] < 16) {
1565 vc
->vc_halfcolor
= color_table
[vc
->vc_par
[1]];
1566 if (vc
->vc_intensity
== 0)
1570 case 8: /* store colors as defaults */
1571 vc
->vc_def_color
= vc
->vc_attr
;
1572 if (vc
->vc_hi_font_mask
== 0x100)
1573 vc
->vc_def_color
>>= 1;
1577 case 9: /* set blanking interval */
1578 blankinterval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60;
1579 poke_blanked_console();
1581 case 10: /* set bell frequency in Hz */
1582 if (vc
->vc_npar
>= 1)
1583 vc
->vc_bell_pitch
= vc
->vc_par
[1];
1585 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1587 case 11: /* set bell duration in msec */
1588 if (vc
->vc_npar
>= 1)
1589 vc
->vc_bell_duration
= (vc
->vc_par
[1] < 2000) ?
1590 msecs_to_jiffies(vc
->vc_par
[1]) : 0;
1592 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1594 case 12: /* bring specified console to the front */
1595 if (vc
->vc_par
[1] >= 1 && vc_cons_allocated(vc
->vc_par
[1] - 1))
1596 set_console(vc
->vc_par
[1] - 1);
1598 case 13: /* unblank the screen */
1599 poke_blanked_console();
1601 case 14: /* set vesa powerdown interval */
1602 vesa_off_interval
= ((vc
->vc_par
[1] < 60) ? vc
->vc_par
[1] : 60) * 60 * HZ
;
1604 case 15: /* activate the previous console */
1605 set_console(last_console
);
1607 case 16: /* set cursor blink duration in msec */
1608 if (vc
->vc_npar
>= 1 && vc
->vc_par
[1] >= 50 &&
1609 vc
->vc_par
[1] <= USHRT_MAX
)
1610 vc
->vc_cur_blink_ms
= vc
->vc_par
[1];
1612 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1617 /* console_lock is held */
1618 static void csi_at(struct vc_data
*vc
, unsigned int nr
)
1620 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1621 nr
= vc
->vc_cols
- vc
->vc_x
;
1624 insert_char(vc
, nr
);
1627 /* console_lock is held */
1628 static void csi_L(struct vc_data
*vc
, unsigned int nr
)
1630 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1631 nr
= vc
->vc_rows
- vc
->vc_y
;
1634 scrdown(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1635 vc
->vc_need_wrap
= 0;
1638 /* console_lock is held */
1639 static void csi_P(struct vc_data
*vc
, unsigned int nr
)
1641 if (nr
> vc
->vc_cols
- vc
->vc_x
)
1642 nr
= vc
->vc_cols
- vc
->vc_x
;
1645 delete_char(vc
, nr
);
1648 /* console_lock is held */
1649 static void csi_M(struct vc_data
*vc
, unsigned int nr
)
1651 if (nr
> vc
->vc_rows
- vc
->vc_y
)
1652 nr
= vc
->vc_rows
- vc
->vc_y
;
1655 scrup(vc
, vc
->vc_y
, vc
->vc_bottom
, nr
);
1656 vc
->vc_need_wrap
= 0;
1659 /* console_lock is held (except via vc_init->reset_terminal */
1660 static void save_cur(struct vc_data
*vc
)
1662 vc
->vc_saved_x
= vc
->vc_x
;
1663 vc
->vc_saved_y
= vc
->vc_y
;
1664 vc
->vc_s_intensity
= vc
->vc_intensity
;
1665 vc
->vc_s_italic
= vc
->vc_italic
;
1666 vc
->vc_s_underline
= vc
->vc_underline
;
1667 vc
->vc_s_blink
= vc
->vc_blink
;
1668 vc
->vc_s_reverse
= vc
->vc_reverse
;
1669 vc
->vc_s_charset
= vc
->vc_charset
;
1670 vc
->vc_s_color
= vc
->vc_color
;
1671 vc
->vc_saved_G0
= vc
->vc_G0_charset
;
1672 vc
->vc_saved_G1
= vc
->vc_G1_charset
;
1675 /* console_lock is held */
1676 static void restore_cur(struct vc_data
*vc
)
1678 gotoxy(vc
, vc
->vc_saved_x
, vc
->vc_saved_y
);
1679 vc
->vc_intensity
= vc
->vc_s_intensity
;
1680 vc
->vc_italic
= vc
->vc_s_italic
;
1681 vc
->vc_underline
= vc
->vc_s_underline
;
1682 vc
->vc_blink
= vc
->vc_s_blink
;
1683 vc
->vc_reverse
= vc
->vc_s_reverse
;
1684 vc
->vc_charset
= vc
->vc_s_charset
;
1685 vc
->vc_color
= vc
->vc_s_color
;
1686 vc
->vc_G0_charset
= vc
->vc_saved_G0
;
1687 vc
->vc_G1_charset
= vc
->vc_saved_G1
;
1688 vc
->vc_translate
= set_translate(vc
->vc_charset
? vc
->vc_G1_charset
: vc
->vc_G0_charset
, vc
);
1690 vc
->vc_need_wrap
= 0;
1693 enum { ESnormal
, ESesc
, ESsquare
, ESgetpars
, ESfunckey
,
1694 EShash
, ESsetG0
, ESsetG1
, ESpercent
, ESignore
, ESnonstd
,
1697 /* console_lock is held (except via vc_init()) */
1698 static void reset_terminal(struct vc_data
*vc
, int do_clear
)
1701 vc
->vc_bottom
= vc
->vc_rows
;
1702 vc
->vc_state
= ESnormal
;
1704 vc
->vc_translate
= set_translate(LAT1_MAP
, vc
);
1705 vc
->vc_G0_charset
= LAT1_MAP
;
1706 vc
->vc_G1_charset
= GRAF_MAP
;
1708 vc
->vc_need_wrap
= 0;
1709 vc
->vc_report_mouse
= 0;
1710 vc
->vc_utf
= default_utf8
;
1711 vc
->vc_utf_count
= 0;
1713 vc
->vc_disp_ctrl
= 0;
1714 vc
->vc_toggle_meta
= 0;
1719 vc
->vc_deccm
= global_cursor_default
;
1722 vt_reset_keyboard(vc
->vc_num
);
1724 vc
->vc_cursor_type
= cur_default
;
1725 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1730 vc
->vc_tab_stop
[0] = 0x01010100;
1731 vc
->vc_tab_stop
[1] =
1732 vc
->vc_tab_stop
[2] =
1733 vc
->vc_tab_stop
[3] =
1734 vc
->vc_tab_stop
[4] =
1735 vc
->vc_tab_stop
[5] =
1736 vc
->vc_tab_stop
[6] =
1737 vc
->vc_tab_stop
[7] = 0x01010101;
1739 vc
->vc_bell_pitch
= DEFAULT_BELL_PITCH
;
1740 vc
->vc_bell_duration
= DEFAULT_BELL_DURATION
;
1741 vc
->vc_cur_blink_ms
= DEFAULT_CURSOR_BLINK_MS
;
1749 /* console_lock is held */
1750 static void do_con_trol(struct tty_struct
*tty
, struct vc_data
*vc
, int c
)
1753 * Control characters can be used in the _middle_
1754 * of an escape sequence.
1756 if (vc
->vc_state
== ESosc
&& c
>=8 && c
<=13) /* ... except for OSC */
1762 if (vc
->vc_state
== ESosc
)
1763 vc
->vc_state
= ESnormal
;
1764 else if (vc
->vc_bell_duration
)
1765 kd_mksound(vc
->vc_bell_pitch
, vc
->vc_bell_duration
);
1771 vc
->vc_pos
-= (vc
->vc_x
<< 1);
1772 while (vc
->vc_x
< vc
->vc_cols
- 1) {
1774 if (vc
->vc_tab_stop
[vc
->vc_x
>> 5] & (1 << (vc
->vc_x
& 31)))
1777 vc
->vc_pos
+= (vc
->vc_x
<< 1);
1778 notify_write(vc
, '\t');
1780 case 10: case 11: case 12:
1782 if (!is_kbd(vc
, lnm
))
1789 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
1790 vc
->vc_disp_ctrl
= 1;
1794 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
1795 vc
->vc_disp_ctrl
= 0;
1798 vc
->vc_state
= ESnormal
;
1801 vc
->vc_state
= ESesc
;
1807 vc
->vc_state
= ESsquare
;
1810 switch(vc
->vc_state
) {
1812 vc
->vc_state
= ESnormal
;
1815 vc
->vc_state
= ESsquare
;
1818 vc
->vc_state
= ESnonstd
;
1821 vc
->vc_state
= ESpercent
;
1834 vc
->vc_tab_stop
[vc
->vc_x
>> 5] |= (1 << (vc
->vc_x
& 31));
1846 vc
->vc_state
= ESsetG0
;
1849 vc
->vc_state
= ESsetG1
;
1852 vc
->vc_state
= EShash
;
1855 reset_terminal(vc
, 1);
1857 case '>': /* Numeric keypad */
1858 clr_kbd(vc
, kbdapplic
);
1860 case '=': /* Appl. keypad */
1861 set_kbd(vc
, kbdapplic
);
1866 if (c
=='P') { /* palette escape sequence */
1867 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1868 vc
->vc_par
[vc
->vc_npar
] = 0;
1870 vc
->vc_state
= ESpalette
;
1872 } else if (c
=='R') { /* reset palette */
1874 vc
->vc_state
= ESnormal
;
1875 } else if (c
>='0' && c
<='9')
1876 vc
->vc_state
= ESosc
;
1878 vc
->vc_state
= ESnormal
;
1882 vc
->vc_par
[vc
->vc_npar
++] = hex_to_bin(c
);
1883 if (vc
->vc_npar
== 7) {
1884 int i
= vc
->vc_par
[0] * 3, j
= 1;
1885 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1886 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1887 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1888 vc
->vc_palette
[i
++] += vc
->vc_par
[j
++];
1889 vc
->vc_palette
[i
] = 16 * vc
->vc_par
[j
++];
1890 vc
->vc_palette
[i
] += vc
->vc_par
[j
];
1892 vc
->vc_state
= ESnormal
;
1895 vc
->vc_state
= ESnormal
;
1898 for (vc
->vc_npar
= 0; vc
->vc_npar
< NPAR
; vc
->vc_npar
++)
1899 vc
->vc_par
[vc
->vc_npar
] = 0;
1901 vc
->vc_state
= ESgetpars
;
1902 if (c
== '[') { /* Function key */
1903 vc
->vc_state
=ESfunckey
;
1906 vc
->vc_ques
= (c
== '?');
1910 if (c
== ';' && vc
->vc_npar
< NPAR
- 1) {
1913 } else if (c
>='0' && c
<='9') {
1914 vc
->vc_par
[vc
->vc_npar
] *= 10;
1915 vc
->vc_par
[vc
->vc_npar
] += c
- '0';
1918 vc
->vc_state
= ESnormal
;
1929 vc
->vc_cursor_type
= vc
->vc_par
[0] | (vc
->vc_par
[1] << 8) | (vc
->vc_par
[2] << 16);
1931 vc
->vc_cursor_type
= cur_default
;
1939 vc
->vc_complement_mask
= vc
->vc_par
[0] << 8 | vc
->vc_par
[1];
1941 vc
->vc_complement_mask
= vc
->vc_s_complement_mask
;
1947 if (vc
->vc_par
[0] == 5)
1949 else if (vc
->vc_par
[0] == 6)
1950 cursor_report(vc
, tty
);
1962 gotoxy(vc
, vc
->vc_par
[0], vc
->vc_y
);
1967 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
- vc
->vc_par
[0]);
1972 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
+ vc
->vc_par
[0]);
1977 gotoxy(vc
, vc
->vc_x
+ vc
->vc_par
[0], vc
->vc_y
);
1982 gotoxy(vc
, vc
->vc_x
- vc
->vc_par
[0], vc
->vc_y
);
1987 gotoxy(vc
, 0, vc
->vc_y
+ vc
->vc_par
[0]);
1992 gotoxy(vc
, 0, vc
->vc_y
- vc
->vc_par
[0]);
1997 gotoxay(vc
, vc
->vc_x
,vc
->vc_par
[0]);
2004 gotoxay(vc
, vc
->vc_par
[1], vc
->vc_par
[0]);
2007 csi_J(vc
, vc
->vc_par
[0]);
2010 csi_K(vc
, vc
->vc_par
[0]);
2013 csi_L(vc
, vc
->vc_par
[0]);
2016 csi_M(vc
, vc
->vc_par
[0]);
2019 csi_P(vc
, vc
->vc_par
[0]);
2027 vc
->vc_tab_stop
[vc
->vc_x
>> 5] &= ~(1 << (vc
->vc_x
& 31));
2028 else if (vc
->vc_par
[0] == 3) {
2029 vc
->vc_tab_stop
[0] =
2030 vc
->vc_tab_stop
[1] =
2031 vc
->vc_tab_stop
[2] =
2032 vc
->vc_tab_stop
[3] =
2033 vc
->vc_tab_stop
[4] =
2034 vc
->vc_tab_stop
[5] =
2035 vc
->vc_tab_stop
[6] =
2036 vc
->vc_tab_stop
[7] = 0;
2042 case 'q': /* DECLL - but only 3 leds */
2043 /* map 0,1,2,3 to 0,1,2,4 */
2044 if (vc
->vc_par
[0] < 4)
2045 vt_set_led_state(vc
->vc_num
,
2046 (vc
->vc_par
[0] < 3) ? vc
->vc_par
[0] : 4);
2052 vc
->vc_par
[1] = vc
->vc_rows
;
2053 /* Minimum allowed region is 2 lines */
2054 if (vc
->vc_par
[0] < vc
->vc_par
[1] &&
2055 vc
->vc_par
[1] <= vc
->vc_rows
) {
2056 vc
->vc_top
= vc
->vc_par
[0] - 1;
2057 vc
->vc_bottom
= vc
->vc_par
[1];
2068 csi_X(vc
, vc
->vc_par
[0]);
2071 csi_at(vc
, vc
->vc_par
[0]);
2073 case ']': /* setterm functions */
2074 setterm_command(vc
);
2079 vc
->vc_state
= ESnormal
;
2081 case '@': /* defined in ISO 2022 */
2084 case 'G': /* prelim official escape code */
2085 case '8': /* retained for compatibility */
2091 vc
->vc_state
= ESnormal
;
2094 vc
->vc_state
= ESnormal
;
2096 /* DEC screen alignment test. kludge :-) */
2097 vc
->vc_video_erase_char
=
2098 (vc
->vc_video_erase_char
& 0xff00) | 'E';
2100 vc
->vc_video_erase_char
=
2101 (vc
->vc_video_erase_char
& 0xff00) | ' ';
2102 do_update_region(vc
, vc
->vc_origin
, vc
->vc_screenbuf_size
/ 2);
2107 vc
->vc_G0_charset
= GRAF_MAP
;
2109 vc
->vc_G0_charset
= LAT1_MAP
;
2111 vc
->vc_G0_charset
= IBMPC_MAP
;
2113 vc
->vc_G0_charset
= USER_MAP
;
2114 if (vc
->vc_charset
== 0)
2115 vc
->vc_translate
= set_translate(vc
->vc_G0_charset
, vc
);
2116 vc
->vc_state
= ESnormal
;
2120 vc
->vc_G1_charset
= GRAF_MAP
;
2122 vc
->vc_G1_charset
= LAT1_MAP
;
2124 vc
->vc_G1_charset
= IBMPC_MAP
;
2126 vc
->vc_G1_charset
= USER_MAP
;
2127 if (vc
->vc_charset
== 1)
2128 vc
->vc_translate
= set_translate(vc
->vc_G1_charset
, vc
);
2129 vc
->vc_state
= ESnormal
;
2134 vc
->vc_state
= ESnormal
;
2138 /* is_double_width() is based on the wcwidth() implementation by
2139 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2140 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2147 static int bisearch(uint32_t ucs
, const struct interval
*table
, int max
)
2152 if (ucs
< table
[0].first
|| ucs
> table
[max
].last
)
2154 while (max
>= min
) {
2155 mid
= (min
+ max
) / 2;
2156 if (ucs
> table
[mid
].last
)
2158 else if (ucs
< table
[mid
].first
)
2166 static int is_double_width(uint32_t ucs
)
2168 static const struct interval double_width
[] = {
2169 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2170 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2171 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2172 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2174 return bisearch(ucs
, double_width
, ARRAY_SIZE(double_width
) - 1);
2177 static void con_flush(struct vc_data
*vc
, unsigned long draw_from
,
2178 unsigned long draw_to
, int *draw_x
)
2183 vc
->vc_sw
->con_putcs(vc
, (u16
*)draw_from
,
2184 (u16
*)draw_to
- (u16
*)draw_from
, vc
->vc_y
, *draw_x
);
2188 /* acquires console_lock */
2189 static int do_con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2191 int c
, tc
, ok
, n
= 0, draw_x
= -1;
2192 unsigned int currcons
;
2193 unsigned long draw_from
= 0, draw_to
= 0;
2195 unsigned char vc_attr
;
2196 struct vt_notifier_param param
;
2200 u16 himask
, charmask
;
2208 vc
= tty
->driver_data
;
2210 printk(KERN_ERR
"vt: argh, driver_data is NULL !\n");
2215 currcons
= vc
->vc_num
;
2216 if (!vc_cons_allocated(currcons
)) {
2217 /* could this happen? */
2218 pr_warn_once("con_write: tty %d not allocated\n", currcons
+1);
2223 himask
= vc
->vc_hi_font_mask
;
2224 charmask
= himask
? 0x1ff : 0xff;
2226 /* undraw cursor first */
2232 while (!tty
->stopped
&& count
) {
2242 /* Do no translation at all in control states */
2243 if (vc
->vc_state
!= ESnormal
) {
2245 } else if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2246 /* Combine UTF-8 into Unicode in vc_utf_char.
2247 * vc_utf_count is the number of continuation bytes still
2248 * expected to arrive.
2249 * vc_npar is the number of continuation bytes arrived so
2253 if ((c
& 0xc0) == 0x80) {
2254 /* Continuation byte received */
2255 static const uint32_t utf8_length_changes
[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2256 if (vc
->vc_utf_count
) {
2257 vc
->vc_utf_char
= (vc
->vc_utf_char
<< 6) | (c
& 0x3f);
2259 if (--vc
->vc_utf_count
) {
2260 /* Still need some bytes */
2263 /* Got a whole character */
2264 c
= vc
->vc_utf_char
;
2265 /* Reject overlong sequences */
2266 if (c
<= utf8_length_changes
[vc
->vc_npar
- 1] ||
2267 c
> utf8_length_changes
[vc
->vc_npar
])
2270 /* Unexpected continuation byte */
2271 vc
->vc_utf_count
= 0;
2275 /* Single ASCII byte or first byte of a sequence received */
2276 if (vc
->vc_utf_count
) {
2277 /* Continuation byte expected */
2279 vc
->vc_utf_count
= 0;
2281 } else if (c
> 0x7f) {
2282 /* First byte of a multibyte sequence received */
2284 if ((c
& 0xe0) == 0xc0) {
2285 vc
->vc_utf_count
= 1;
2286 vc
->vc_utf_char
= (c
& 0x1f);
2287 } else if ((c
& 0xf0) == 0xe0) {
2288 vc
->vc_utf_count
= 2;
2289 vc
->vc_utf_char
= (c
& 0x0f);
2290 } else if ((c
& 0xf8) == 0xf0) {
2291 vc
->vc_utf_count
= 3;
2292 vc
->vc_utf_char
= (c
& 0x07);
2293 } else if ((c
& 0xfc) == 0xf8) {
2294 vc
->vc_utf_count
= 4;
2295 vc
->vc_utf_char
= (c
& 0x03);
2296 } else if ((c
& 0xfe) == 0xfc) {
2297 vc
->vc_utf_count
= 5;
2298 vc
->vc_utf_char
= (c
& 0x01);
2300 /* 254 and 255 are invalid */
2303 if (vc
->vc_utf_count
) {
2304 /* Still need some bytes */
2308 /* Nothing to do if an ASCII byte was received */
2310 /* End of UTF-8 decoding. */
2311 /* c is the received character, or U+FFFD for invalid sequences. */
2312 /* Replace invalid Unicode code points with U+FFFD too */
2313 if ((c
>= 0xd800 && c
<= 0xdfff) || c
== 0xfffe || c
== 0xffff)
2316 } else { /* no utf or alternate charset mode */
2317 tc
= vc_translate(vc
, c
);
2321 if (atomic_notifier_call_chain(&vt_notifier_list
, VT_PREWRITE
,
2322 ¶m
) == NOTIFY_STOP
)
2325 /* If the original code was a control character we
2326 * only allow a glyph to be displayed if the code is
2327 * not normally used (such as for cursor movement) or
2328 * if the disp_ctrl mode has been explicitly enabled.
2329 * Certain characters (as given by the CTRL_ALWAYS
2330 * bitmap) are always displayed as control characters,
2331 * as the console would be pretty useless without
2332 * them; to display an arbitrary font position use the
2333 * direct-to-font zone in UTF-8 mode.
2335 ok
= tc
&& (c
>= 32 ||
2336 !(vc
->vc_disp_ctrl
? (CTRL_ALWAYS
>> c
) & 1 :
2337 vc
->vc_utf
|| ((CTRL_ACTION
>> c
) & 1)))
2338 && (c
!= 127 || vc
->vc_disp_ctrl
)
2341 if (vc
->vc_state
== ESnormal
&& ok
) {
2342 if (vc
->vc_utf
&& !vc
->vc_disp_ctrl
) {
2343 if (is_double_width(c
))
2346 /* Now try to find out how to display it */
2347 tc
= conv_uni_to_pc(vc
, tc
);
2348 if (tc
& ~charmask
) {
2349 if (tc
== -1 || tc
== -2) {
2350 continue; /* nothing to display */
2352 /* Glyph not found */
2353 if ((!(vc
->vc_utf
&& !vc
->vc_disp_ctrl
) || c
< 128) && !(c
& ~charmask
)) {
2354 /* In legacy mode use the glyph we get by a 1:1 mapping.
2355 This would make absolutely no sense with Unicode in mind,
2356 but do this for ASCII characters since a font may lack
2357 Unicode mapping info and we don't want to end up with
2358 having question marks only. */
2361 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2362 tc
= conv_uni_to_pc(vc
, 0xfffd);
2365 tc
= conv_uni_to_pc(vc
, '?');
2366 if (tc
< 0) tc
= '?';
2372 vc_attr
= vc
->vc_attr
;
2374 /* invert vc_attr */
2375 if (!vc
->vc_can_do_color
) {
2376 vc_attr
= (vc
->vc_attr
) ^ 0x08;
2377 } else if (vc
->vc_hi_font_mask
== 0x100) {
2378 vc_attr
= ((vc
->vc_attr
) & 0x11) | (((vc
->vc_attr
) & 0xe0) >> 4) | (((vc
->vc_attr
) & 0x0e) << 4);
2380 vc_attr
= ((vc
->vc_attr
) & 0x88) | (((vc
->vc_attr
) & 0x70) >> 4) | (((vc
->vc_attr
) & 0x07) << 4);
2382 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2386 if (vc
->vc_need_wrap
|| vc
->vc_decim
)
2387 con_flush(vc
, draw_from
, draw_to
,
2389 if (vc
->vc_need_wrap
) {
2396 ((vc_attr
<< 8) & ~himask
) + ((tc
& 0x100) ? himask
: 0) + (tc
& 0xff) :
2397 (vc_attr
<< 8) + tc
,
2398 (u16
*) vc
->vc_pos
);
2399 if (con_should_update(vc
) && draw_x
< 0) {
2401 draw_from
= vc
->vc_pos
;
2403 if (vc
->vc_x
== vc
->vc_cols
- 1) {
2404 vc
->vc_need_wrap
= vc
->vc_decawm
;
2405 draw_to
= vc
->vc_pos
+ 2;
2408 draw_to
= (vc
->vc_pos
+= 2);
2411 if (!--width
) break;
2413 tc
= conv_uni_to_pc(vc
, ' '); /* A space is printed in the second column */
2414 if (tc
< 0) tc
= ' ';
2416 notify_write(vc
, c
);
2419 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2426 goto rescan_last_byte
;
2430 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2431 do_con_trol(tty
, vc
, orig
);
2433 con_flush(vc
, draw_from
, draw_to
, &draw_x
);
2434 console_conditional_schedule();
2441 * This is the console switching callback.
2443 * Doing console switching in a process context allows
2444 * us to do the switches asynchronously (needed when we want
2445 * to switch due to a keyboard interrupt). Synchronization
2446 * with other console code and prevention of re-entrancy is
2447 * ensured with console_lock.
2449 static void console_callback(struct work_struct
*ignored
)
2453 if (want_console
>= 0) {
2454 if (want_console
!= fg_console
&&
2455 vc_cons_allocated(want_console
)) {
2456 hide_cursor(vc_cons
[fg_console
].d
);
2457 change_console(vc_cons
[want_console
].d
);
2458 /* we only changed when the console had already
2459 been allocated - a new console is not created
2460 in an interrupt routine */
2464 if (do_poke_blanked_console
) { /* do not unblank for a LED change */
2465 do_poke_blanked_console
= 0;
2466 poke_blanked_console();
2468 if (scrollback_delta
) {
2469 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2471 if (vc
->vc_mode
== KD_TEXT
&& vc
->vc_sw
->con_scrolldelta
)
2472 vc
->vc_sw
->con_scrolldelta(vc
, scrollback_delta
);
2473 scrollback_delta
= 0;
2475 if (blank_timer_expired
) {
2477 blank_timer_expired
= 0;
2479 notify_update(vc_cons
[fg_console
].d
);
2484 int set_console(int nr
)
2486 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2488 if (!vc_cons_allocated(nr
) || vt_dont_switch
||
2489 (vc
->vt_mode
.mode
== VT_AUTO
&& vc
->vc_mode
== KD_GRAPHICS
)) {
2492 * Console switch will fail in console_callback() or
2493 * change_console() so there is no point scheduling
2496 * Existing set_console() users don't check the return
2497 * value so this shouldn't break anything
2503 schedule_console_callback();
2508 struct tty_driver
*console_driver
;
2510 #ifdef CONFIG_VT_CONSOLE
2513 * vt_kmsg_redirect() - Sets/gets the kernel message console
2514 * @new: The new virtual terminal number or -1 if the console should stay
2517 * By default, the kernel messages are always printed on the current virtual
2518 * console. However, the user may modify that default with the
2519 * TIOCL_SETKMSGREDIRECT ioctl call.
2521 * This function sets the kernel message console to be @new. It returns the old
2522 * virtual console number. The virtual terminal number 0 (both as parameter and
2523 * return value) means no redirection (i.e. always printed on the currently
2526 * The parameter -1 means that only the current console is returned, but the
2527 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
2528 * case to make the code more understandable.
2530 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
2531 * the parameter and always returns 0.
2533 int vt_kmsg_redirect(int new)
2535 static int kmsg_con
;
2538 return xchg(&kmsg_con
, new);
2544 * Console on virtual terminal
2546 * The console must be locked when we get here.
2549 static void vt_console_print(struct console
*co
, const char *b
, unsigned count
)
2551 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
2553 static DEFINE_SPINLOCK(printing_lock
);
2554 const ushort
*start
;
2559 /* console busy or not yet initialized */
2562 if (!spin_trylock(&printing_lock
))
2565 kmsg_console
= vt_get_kmsg_redirect();
2566 if (kmsg_console
&& vc_cons_allocated(kmsg_console
- 1))
2567 vc
= vc_cons
[kmsg_console
- 1].d
;
2569 /* read `x' only after setting currcons properly (otherwise
2570 the `x' macro will read the x of the foreground console). */
2573 if (!vc_cons_allocated(fg_console
)) {
2575 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2579 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
2582 /* undraw cursor first */
2586 start
= (ushort
*)vc
->vc_pos
;
2588 /* Contrived structure to try to emulate original need_wrap behaviour
2589 * Problems caused when we have need_wrap set on '\n' character */
2592 if (c
== 10 || c
== 13 || c
== 8 || vc
->vc_need_wrap
) {
2594 if (con_is_visible(vc
))
2595 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2597 if (vc
->vc_need_wrap
)
2601 if (c
== 8) { /* backspace */
2603 start
= (ushort
*)vc
->vc_pos
;
2610 start
= (ushort
*)vc
->vc_pos
;
2612 if (c
== 10 || c
== 13)
2615 scr_writew((vc
->vc_attr
<< 8) + c
, (unsigned short *)vc
->vc_pos
);
2616 notify_write(vc
, c
);
2618 if (myx
== vc
->vc_cols
- 1) {
2619 vc
->vc_need_wrap
= 1;
2626 if (con_is_visible(vc
))
2627 vc
->vc_sw
->con_putcs(vc
, start
, cnt
, vc
->vc_y
, vc
->vc_x
);
2629 if (vc
->vc_x
== vc
->vc_cols
) {
2631 vc
->vc_need_wrap
= 1;
2638 spin_unlock(&printing_lock
);
2641 static struct tty_driver
*vt_console_device(struct console
*c
, int *index
)
2643 *index
= c
->index
? c
->index
-1 : fg_console
;
2644 return console_driver
;
2647 static struct console vt_console_driver
= {
2649 .write
= vt_console_print
,
2650 .device
= vt_console_device
,
2651 .unblank
= unblank_screen
,
2652 .flags
= CON_PRINTBUFFER
,
2658 * Handling of Linux-specific VC ioctls
2662 * Generally a bit racy with respect to console_lock();.
2664 * There are some functions which don't need it.
2666 * There are some functions which can sleep for arbitrary periods
2667 * (paste_selection) but we don't need the lock there anyway.
2669 * set_selection has locking, and definitely needs it
2672 int tioclinux(struct tty_struct
*tty
, unsigned long arg
)
2675 char __user
*p
= (char __user
*)arg
;
2679 if (current
->signal
->tty
!= tty
&& !capable(CAP_SYS_ADMIN
))
2681 if (get_user(type
, p
))
2689 ret
= set_selection((struct tiocl_selection __user
*)(p
+1), tty
);
2692 case TIOCL_PASTESEL
:
2693 ret
= paste_selection(tty
);
2695 case TIOCL_UNBLANKSCREEN
:
2700 case TIOCL_SELLOADLUT
:
2702 ret
= sel_loadlut(p
);
2705 case TIOCL_GETSHIFTSTATE
:
2708 * Make it possible to react to Shift+Mousebutton.
2709 * Note that 'shift_state' is an undocumented
2710 * kernel-internal variable; programs not closely
2711 * related to the kernel should not use this.
2713 data
= vt_get_shift_state();
2714 ret
= __put_user(data
, p
);
2716 case TIOCL_GETMOUSEREPORTING
:
2717 console_lock(); /* May be overkill */
2718 data
= mouse_reporting();
2720 ret
= __put_user(data
, p
);
2722 case TIOCL_SETVESABLANK
:
2724 ret
= set_vesa_blanking(p
);
2727 case TIOCL_GETKMSGREDIRECT
:
2728 data
= vt_get_kmsg_redirect();
2729 ret
= __put_user(data
, p
);
2731 case TIOCL_SETKMSGREDIRECT
:
2732 if (!capable(CAP_SYS_ADMIN
)) {
2735 if (get_user(data
, p
+1))
2738 vt_kmsg_redirect(data
);
2741 case TIOCL_GETFGCONSOLE
:
2742 /* No locking needed as this is a transiently
2743 correct return anyway if the caller hasn't
2744 disabled switching */
2747 case TIOCL_SCROLLCONSOLE
:
2748 if (get_user(lines
, (s32 __user
*)(p
+4))) {
2751 /* Need the console lock here. Note that lots
2752 of other calls need fixing before the lock
2753 is actually useful ! */
2755 scrollfront(vc_cons
[fg_console
].d
, lines
);
2760 case TIOCL_BLANKSCREEN
: /* until explicitly unblanked, not only poked */
2766 case TIOCL_BLANKEDSCREEN
:
2767 ret
= console_blanked
;
2777 * /dev/ttyN handling
2780 static int con_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
2784 retval
= do_con_write(tty
, buf
, count
);
2785 con_flush_chars(tty
);
2790 static int con_put_char(struct tty_struct
*tty
, unsigned char ch
)
2793 return 0; /* n_r3964 calls put_char() from interrupt context */
2794 return do_con_write(tty
, &ch
, 1);
2797 static int con_write_room(struct tty_struct
*tty
)
2801 return 32768; /* No limit, really; we're not buffering */
2804 static int con_chars_in_buffer(struct tty_struct
*tty
)
2806 return 0; /* we're not buffering */
2810 * con_throttle and con_unthrottle are only used for
2811 * paste_selection(), which has to stuff in a large number of
2814 static void con_throttle(struct tty_struct
*tty
)
2818 static void con_unthrottle(struct tty_struct
*tty
)
2820 struct vc_data
*vc
= tty
->driver_data
;
2822 wake_up_interruptible(&vc
->paste_wait
);
2826 * Turn the Scroll-Lock LED on when the tty is stopped
2828 static void con_stop(struct tty_struct
*tty
)
2833 console_num
= tty
->index
;
2834 if (!vc_cons_allocated(console_num
))
2836 vt_kbd_con_stop(console_num
);
2840 * Turn the Scroll-Lock LED off when the console is started
2842 static void con_start(struct tty_struct
*tty
)
2847 console_num
= tty
->index
;
2848 if (!vc_cons_allocated(console_num
))
2850 vt_kbd_con_start(console_num
);
2853 static void con_flush_chars(struct tty_struct
*tty
)
2857 if (in_interrupt()) /* from flush_to_ldisc */
2860 /* if we race with con_close(), vt may be null */
2862 vc
= tty
->driver_data
;
2869 * Allocate the console screen memory.
2871 static int con_install(struct tty_driver
*driver
, struct tty_struct
*tty
)
2873 unsigned int currcons
= tty
->index
;
2878 ret
= vc_allocate(currcons
);
2882 vc
= vc_cons
[currcons
].d
;
2884 /* Still being freed */
2890 ret
= tty_port_install(&vc
->port
, driver
, tty
);
2894 tty
->driver_data
= vc
;
2897 if (!tty
->winsize
.ws_row
&& !tty
->winsize
.ws_col
) {
2898 tty
->winsize
.ws_row
= vc_cons
[currcons
].d
->vc_rows
;
2899 tty
->winsize
.ws_col
= vc_cons
[currcons
].d
->vc_cols
;
2902 tty
->termios
.c_iflag
|= IUTF8
;
2904 tty
->termios
.c_iflag
&= ~IUTF8
;
2910 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
2912 /* everything done in install */
2917 static void con_close(struct tty_struct
*tty
, struct file
*filp
)
2919 /* Nothing to do - we defer to shutdown */
2922 static void con_shutdown(struct tty_struct
*tty
)
2924 struct vc_data
*vc
= tty
->driver_data
;
2927 vc
->port
.tty
= NULL
;
2931 static int default_color
= 7; /* white */
2932 static int default_italic_color
= 2; // green (ASCII)
2933 static int default_underline_color
= 3; // cyan (ASCII)
2934 module_param_named(color
, default_color
, int, S_IRUGO
| S_IWUSR
);
2935 module_param_named(italic
, default_italic_color
, int, S_IRUGO
| S_IWUSR
);
2936 module_param_named(underline
, default_underline_color
, int, S_IRUGO
| S_IWUSR
);
2938 static void vc_init(struct vc_data
*vc
, unsigned int rows
,
2939 unsigned int cols
, int do_clear
)
2945 vc
->vc_size_row
= cols
<< 1;
2946 vc
->vc_screenbuf_size
= vc
->vc_rows
* vc
->vc_size_row
;
2949 vc
->vc_pos
= vc
->vc_origin
;
2951 for (j
=k
=0; j
<16; j
++) {
2952 vc
->vc_palette
[k
++] = default_red
[j
] ;
2953 vc
->vc_palette
[k
++] = default_grn
[j
] ;
2954 vc
->vc_palette
[k
++] = default_blu
[j
] ;
2956 vc
->vc_def_color
= default_color
;
2957 vc
->vc_ulcolor
= default_underline_color
;
2958 vc
->vc_itcolor
= default_italic_color
;
2959 vc
->vc_halfcolor
= 0x08; /* grey */
2960 init_waitqueue_head(&vc
->paste_wait
);
2961 reset_terminal(vc
, do_clear
);
2965 * This routine initializes console interrupts, and does nothing
2966 * else. If you want the screen to clear, call tty_write with
2967 * the appropriate escape-sequence.
2970 static int __init
con_init(void)
2972 const char *display_desc
= NULL
;
2974 unsigned int currcons
= 0, i
;
2979 display_desc
= conswitchp
->con_startup();
2980 if (!display_desc
) {
2986 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
2987 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
2989 if (con_driver
->con
== NULL
) {
2990 con_driver
->con
= conswitchp
;
2991 con_driver
->desc
= display_desc
;
2992 con_driver
->flag
= CON_DRIVER_FLAG_INIT
;
2993 con_driver
->first
= 0;
2994 con_driver
->last
= MAX_NR_CONSOLES
- 1;
2999 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++)
3000 con_driver_map
[i
] = conswitchp
;
3002 if (blankinterval
) {
3003 blank_state
= blank_normal_wait
;
3004 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3007 for (currcons
= 0; currcons
< MIN_NR_CONSOLES
; currcons
++) {
3008 vc_cons
[currcons
].d
= vc
= kzalloc(sizeof(struct vc_data
), GFP_NOWAIT
);
3009 INIT_WORK(&vc_cons
[currcons
].SAK_work
, vc_SAK
);
3010 tty_port_init(&vc
->port
);
3011 visual_init(vc
, currcons
, 1);
3012 vc
->vc_screenbuf
= kzalloc(vc
->vc_screenbuf_size
, GFP_NOWAIT
);
3013 vc_init(vc
, vc
->vc_rows
, vc
->vc_cols
,
3014 currcons
|| !vc
->vc_sw
->con_save_screen
);
3016 currcons
= fg_console
= 0;
3017 master_display_fg
= vc
= vc_cons
[currcons
].d
;
3020 gotoxy(vc
, vc
->vc_x
, vc
->vc_y
);
3023 pr_info("Console: %s %s %dx%d\n",
3024 vc
->vc_can_do_color
? "colour" : "mono",
3025 display_desc
, vc
->vc_cols
, vc
->vc_rows
);
3030 #ifdef CONFIG_VT_CONSOLE
3031 register_console(&vt_console_driver
);
3035 console_initcall(con_init
);
3037 static const struct tty_operations con_ops
= {
3038 .install
= con_install
,
3042 .write_room
= con_write_room
,
3043 .put_char
= con_put_char
,
3044 .flush_chars
= con_flush_chars
,
3045 .chars_in_buffer
= con_chars_in_buffer
,
3047 #ifdef CONFIG_COMPAT
3048 .compat_ioctl
= vt_compat_ioctl
,
3052 .throttle
= con_throttle
,
3053 .unthrottle
= con_unthrottle
,
3054 .resize
= vt_resize
,
3055 .shutdown
= con_shutdown
3058 static struct cdev vc0_cdev
;
3060 static ssize_t
show_tty_active(struct device
*dev
,
3061 struct device_attribute
*attr
, char *buf
)
3063 return sprintf(buf
, "tty%d\n", fg_console
+ 1);
3065 static DEVICE_ATTR(active
, S_IRUGO
, show_tty_active
, NULL
);
3067 static struct attribute
*vt_dev_attrs
[] = {
3068 &dev_attr_active
.attr
,
3072 ATTRIBUTE_GROUPS(vt_dev
);
3074 int __init
vty_init(const struct file_operations
*console_fops
)
3076 cdev_init(&vc0_cdev
, console_fops
);
3077 if (cdev_add(&vc0_cdev
, MKDEV(TTY_MAJOR
, 0), 1) ||
3078 register_chrdev_region(MKDEV(TTY_MAJOR
, 0), 1, "/dev/vc/0") < 0)
3079 panic("Couldn't register /dev/tty0 driver\n");
3080 tty0dev
= device_create_with_groups(tty_class
, NULL
,
3081 MKDEV(TTY_MAJOR
, 0), NULL
,
3082 vt_dev_groups
, "tty0");
3083 if (IS_ERR(tty0dev
))
3088 console_driver
= alloc_tty_driver(MAX_NR_CONSOLES
);
3089 if (!console_driver
)
3090 panic("Couldn't allocate console driver\n");
3092 console_driver
->name
= "tty";
3093 console_driver
->name_base
= 1;
3094 console_driver
->major
= TTY_MAJOR
;
3095 console_driver
->minor_start
= 1;
3096 console_driver
->type
= TTY_DRIVER_TYPE_CONSOLE
;
3097 console_driver
->init_termios
= tty_std_termios
;
3099 console_driver
->init_termios
.c_iflag
|= IUTF8
;
3100 console_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_RESET_TERMIOS
;
3101 tty_set_operations(console_driver
, &con_ops
);
3102 if (tty_register_driver(console_driver
))
3103 panic("Couldn't register console driver\n");
3106 #ifdef CONFIG_MDA_CONSOLE
3112 #ifndef VT_SINGLE_DRIVER
3114 static struct class *vtconsole_class
;
3116 static int do_bind_con_driver(const struct consw
*csw
, int first
, int last
,
3119 struct module
*owner
= csw
->owner
;
3120 const char *desc
= NULL
;
3121 struct con_driver
*con_driver
;
3122 int i
, j
= -1, k
= -1, retval
= -ENODEV
;
3124 if (!try_module_get(owner
))
3127 WARN_CONSOLE_UNLOCKED();
3129 /* check if driver is registered */
3130 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3131 con_driver
= ®istered_con_driver
[i
];
3133 if (con_driver
->con
== csw
) {
3134 desc
= con_driver
->desc
;
3143 if (!(con_driver
->flag
& CON_DRIVER_FLAG_INIT
)) {
3145 con_driver
->flag
|= CON_DRIVER_FLAG_INIT
;
3150 module_put(conswitchp
->owner
);
3152 __module_get(owner
);
3156 first
= max(first
, con_driver
->first
);
3157 last
= min(last
, con_driver
->last
);
3159 for (i
= first
; i
<= last
; i
++) {
3161 struct vc_data
*vc
= vc_cons
[i
].d
;
3163 if (con_driver_map
[i
])
3164 module_put(con_driver_map
[i
]->owner
);
3165 __module_get(owner
);
3166 con_driver_map
[i
] = csw
;
3168 if (!vc
|| !vc
->vc_sw
)
3173 if (con_is_visible(vc
)) {
3178 old_was_color
= vc
->vc_can_do_color
;
3179 vc
->vc_sw
->con_deinit(vc
);
3180 vc
->vc_origin
= (unsigned long)vc
->vc_screenbuf
;
3181 visual_init(vc
, i
, 0);
3185 /* If the console changed between mono <-> color, then
3186 * the attributes in the screenbuf will be wrong. The
3187 * following resets all attributes to something sane.
3189 if (old_was_color
!= vc
->vc_can_do_color
)
3190 clear_buffer_attributes(vc
);
3193 pr_info("Console: switching ");
3195 printk(KERN_CONT
"consoles %d-%d ", first
+1, last
+1);
3197 struct vc_data
*vc
= vc_cons
[j
].d
;
3199 printk(KERN_CONT
"to %s %s %dx%d\n",
3200 vc
->vc_can_do_color
? "colour" : "mono",
3201 desc
, vc
->vc_cols
, vc
->vc_rows
);
3208 printk(KERN_CONT
"to %s\n", desc
);
3217 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3218 /* unlocked version of unbind_con_driver() */
3219 int do_unbind_con_driver(const struct consw
*csw
, int first
, int last
, int deflt
)
3221 struct module
*owner
= csw
->owner
;
3222 const struct consw
*defcsw
= NULL
;
3223 struct con_driver
*con_driver
= NULL
, *con_back
= NULL
;
3224 int i
, retval
= -ENODEV
;
3226 if (!try_module_get(owner
))
3229 WARN_CONSOLE_UNLOCKED();
3231 /* check if driver is registered and if it is unbindable */
3232 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3233 con_driver
= ®istered_con_driver
[i
];
3235 if (con_driver
->con
== csw
&&
3236 con_driver
->flag
& CON_DRIVER_FLAG_MODULE
) {
3247 /* check if backup driver exists */
3248 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3249 con_back
= ®istered_con_driver
[i
];
3251 if (con_back
->con
&& con_back
->con
!= csw
) {
3252 defcsw
= con_back
->con
;
3261 if (!con_is_bound(csw
))
3264 first
= max(first
, con_driver
->first
);
3265 last
= min(last
, con_driver
->last
);
3267 for (i
= first
; i
<= last
; i
++) {
3268 if (con_driver_map
[i
] == csw
) {
3269 module_put(csw
->owner
);
3270 con_driver_map
[i
] = NULL
;
3274 if (!con_is_bound(defcsw
)) {
3275 const struct consw
*defconsw
= conswitchp
;
3277 defcsw
->con_startup();
3278 con_back
->flag
|= CON_DRIVER_FLAG_INIT
;
3280 * vgacon may change the default driver to point
3281 * to dummycon, we restore it here...
3283 conswitchp
= defconsw
;
3286 if (!con_is_bound(csw
))
3287 con_driver
->flag
&= ~CON_DRIVER_FLAG_INIT
;
3289 /* ignore return value, binding should not fail */
3290 do_bind_con_driver(defcsw
, first
, last
, deflt
);
3296 EXPORT_SYMBOL_GPL(do_unbind_con_driver
);
3298 static int vt_bind(struct con_driver
*con
)
3300 const struct consw
*defcsw
= NULL
, *csw
= NULL
;
3301 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3303 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3308 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3309 struct con_driver
*con
= ®istered_con_driver
[i
];
3311 if (con
->con
&& !(con
->flag
& CON_DRIVER_FLAG_MODULE
)) {
3323 for (i
= con
->first
; i
<= con
->last
; i
++) {
3324 if (con_driver_map
[i
] == defcsw
) {
3329 } else if (first
!= -1)
3333 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3337 do_bind_con_driver(csw
, first
, last
, deflt
);
3348 static int vt_unbind(struct con_driver
*con
)
3350 const struct consw
*csw
= NULL
;
3351 int i
, more
= 1, first
= -1, last
= -1, deflt
= 0;
3354 if (!con
->con
|| !(con
->flag
& CON_DRIVER_FLAG_MODULE
))
3362 for (i
= con
->first
; i
<= con
->last
; i
++) {
3363 if (con_driver_map
[i
] == csw
) {
3368 } else if (first
!= -1)
3372 if (first
== 0 && last
== MAX_NR_CONSOLES
-1)
3376 ret
= do_unbind_con_driver(csw
, first
, last
, deflt
);
3390 static inline int vt_bind(struct con_driver
*con
)
3394 static inline int vt_unbind(struct con_driver
*con
)
3398 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3400 static ssize_t
store_bind(struct device
*dev
, struct device_attribute
*attr
,
3401 const char *buf
, size_t count
)
3403 struct con_driver
*con
= dev_get_drvdata(dev
);
3404 int bind
= simple_strtoul(buf
, NULL
, 0);
3418 static ssize_t
show_bind(struct device
*dev
, struct device_attribute
*attr
,
3421 struct con_driver
*con
= dev_get_drvdata(dev
);
3422 int bind
= con_is_bound(con
->con
);
3424 return snprintf(buf
, PAGE_SIZE
, "%i\n", bind
);
3427 static ssize_t
show_name(struct device
*dev
, struct device_attribute
*attr
,
3430 struct con_driver
*con
= dev_get_drvdata(dev
);
3432 return snprintf(buf
, PAGE_SIZE
, "%s %s\n",
3433 (con
->flag
& CON_DRIVER_FLAG_MODULE
) ? "(M)" : "(S)",
3438 static DEVICE_ATTR(bind
, S_IRUGO
|S_IWUSR
, show_bind
, store_bind
);
3439 static DEVICE_ATTR(name
, S_IRUGO
, show_name
, NULL
);
3441 static struct attribute
*con_dev_attrs
[] = {
3442 &dev_attr_bind
.attr
,
3443 &dev_attr_name
.attr
,
3447 ATTRIBUTE_GROUPS(con_dev
);
3449 static int vtconsole_init_device(struct con_driver
*con
)
3451 con
->flag
|= CON_DRIVER_FLAG_ATTR
;
3455 static void vtconsole_deinit_device(struct con_driver
*con
)
3457 con
->flag
&= ~CON_DRIVER_FLAG_ATTR
;
3461 * con_is_bound - checks if driver is bound to the console
3462 * @csw: console driver
3464 * RETURNS: zero if unbound, nonzero if bound
3466 * Drivers can call this and if zero, they should release
3467 * all resources allocated on con_startup()
3469 int con_is_bound(const struct consw
*csw
)
3473 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
3474 if (con_driver_map
[i
] == csw
) {
3482 EXPORT_SYMBOL(con_is_bound
);
3485 * con_debug_enter - prepare the console for the kernel debugger
3486 * @sw: console driver
3488 * Called when the console is taken over by the kernel debugger, this
3489 * function needs to save the current console state, then put the console
3490 * into a state suitable for the kernel debugger.
3493 * Zero on success, nonzero if a failure occurred when trying to prepare
3494 * the console for the debugger.
3496 int con_debug_enter(struct vc_data
*vc
)
3500 saved_fg_console
= fg_console
;
3501 saved_last_console
= last_console
;
3502 saved_want_console
= want_console
;
3503 saved_vc_mode
= vc
->vc_mode
;
3504 saved_console_blanked
= console_blanked
;
3505 vc
->vc_mode
= KD_TEXT
;
3506 console_blanked
= 0;
3507 if (vc
->vc_sw
->con_debug_enter
)
3508 ret
= vc
->vc_sw
->con_debug_enter(vc
);
3509 #ifdef CONFIG_KGDB_KDB
3510 /* Set the initial LINES variable if it is not already set */
3511 if (vc
->vc_rows
< 999) {
3514 const char *setargs
[3] = {
3519 if (kdbgetintenv(setargs
[0], &linecount
)) {
3520 snprintf(lns
, 4, "%i", vc
->vc_rows
);
3521 kdb_set(2, setargs
);
3524 if (vc
->vc_cols
< 999) {
3527 const char *setargs
[3] = {
3532 if (kdbgetintenv(setargs
[0], &colcount
)) {
3533 snprintf(cols
, 4, "%i", vc
->vc_cols
);
3534 kdb_set(2, setargs
);
3537 #endif /* CONFIG_KGDB_KDB */
3540 EXPORT_SYMBOL_GPL(con_debug_enter
);
3543 * con_debug_leave - restore console state
3544 * @sw: console driver
3546 * Restore the console state to what it was before the kernel debugger
3550 * Zero on success, nonzero if a failure occurred when trying to restore
3553 int con_debug_leave(void)
3558 fg_console
= saved_fg_console
;
3559 last_console
= saved_last_console
;
3560 want_console
= saved_want_console
;
3561 console_blanked
= saved_console_blanked
;
3562 vc_cons
[fg_console
].d
->vc_mode
= saved_vc_mode
;
3564 vc
= vc_cons
[fg_console
].d
;
3565 if (vc
->vc_sw
->con_debug_leave
)
3566 ret
= vc
->vc_sw
->con_debug_leave(vc
);
3569 EXPORT_SYMBOL_GPL(con_debug_leave
);
3571 static int do_register_con_driver(const struct consw
*csw
, int first
, int last
)
3573 struct module
*owner
= csw
->owner
;
3574 struct con_driver
*con_driver
;
3578 WARN_CONSOLE_UNLOCKED();
3580 if (!try_module_get(owner
))
3583 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3584 con_driver
= ®istered_con_driver
[i
];
3586 /* already registered */
3587 if (con_driver
->con
== csw
) {
3593 desc
= csw
->con_startup();
3601 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3602 con_driver
= ®istered_con_driver
[i
];
3604 if (con_driver
->con
== NULL
&&
3605 !(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
)) {
3606 con_driver
->con
= csw
;
3607 con_driver
->desc
= desc
;
3608 con_driver
->node
= i
;
3609 con_driver
->flag
= CON_DRIVER_FLAG_MODULE
|
3610 CON_DRIVER_FLAG_INIT
;
3611 con_driver
->first
= first
;
3612 con_driver
->last
= last
;
3622 device_create_with_groups(vtconsole_class
, NULL
,
3623 MKDEV(0, con_driver
->node
),
3624 con_driver
, con_dev_groups
,
3625 "vtcon%i", con_driver
->node
);
3626 if (IS_ERR(con_driver
->dev
)) {
3627 printk(KERN_WARNING
"Unable to create device for %s; "
3628 "errno = %ld\n", con_driver
->desc
,
3629 PTR_ERR(con_driver
->dev
));
3630 con_driver
->dev
= NULL
;
3632 vtconsole_init_device(con_driver
);
3642 * do_unregister_con_driver - unregister console driver from console layer
3643 * @csw: console driver
3645 * DESCRIPTION: All drivers that registers to the console layer must
3646 * call this function upon exit, or if the console driver is in a state
3647 * where it won't be able to handle console services, such as the
3648 * framebuffer console without loaded framebuffer drivers.
3650 * The driver must unbind first prior to unregistration.
3652 int do_unregister_con_driver(const struct consw
*csw
)
3656 /* cannot unregister a bound driver */
3657 if (con_is_bound(csw
))
3660 if (csw
== conswitchp
)
3663 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3664 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3666 if (con_driver
->con
== csw
) {
3668 * Defer the removal of the sysfs entries since that
3669 * will acquire the kernfs s_active lock and we can't
3670 * acquire this lock while holding the console lock:
3671 * the unbind sysfs entry imposes already the opposite
3672 * order. Reset con already here to prevent any later
3673 * lookup to succeed and mark this slot as zombie, so
3674 * it won't get reused until we complete the removal
3675 * in the deferred work.
3677 con_driver
->con
= NULL
;
3678 con_driver
->flag
= CON_DRIVER_FLAG_ZOMBIE
;
3679 schedule_work(&con_driver_unregister_work
);
3687 EXPORT_SYMBOL_GPL(do_unregister_con_driver
);
3689 static void con_driver_unregister_callback(struct work_struct
*ignored
)
3695 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3696 struct con_driver
*con_driver
= ®istered_con_driver
[i
];
3698 if (!(con_driver
->flag
& CON_DRIVER_FLAG_ZOMBIE
))
3703 vtconsole_deinit_device(con_driver
);
3704 device_destroy(vtconsole_class
, MKDEV(0, con_driver
->node
));
3708 if (WARN_ON_ONCE(con_driver
->con
))
3709 con_driver
->con
= NULL
;
3710 con_driver
->desc
= NULL
;
3711 con_driver
->dev
= NULL
;
3712 con_driver
->node
= 0;
3713 WARN_ON_ONCE(con_driver
->flag
!= CON_DRIVER_FLAG_ZOMBIE
);
3714 con_driver
->flag
= 0;
3715 con_driver
->first
= 0;
3716 con_driver
->last
= 0;
3723 * If we support more console drivers, this function is used
3724 * when a driver wants to take over some existing consoles
3725 * and become default driver for newly opened ones.
3727 * do_take_over_console is basically a register followed by unbind
3729 int do_take_over_console(const struct consw
*csw
, int first
, int last
, int deflt
)
3733 err
= do_register_con_driver(csw
, first
, last
);
3735 * If we get an busy error we still want to bind the console driver
3736 * and return success, as we may have unbound the console driver
3737 * but not unregistered it.
3742 do_bind_con_driver(csw
, first
, last
, deflt
);
3746 EXPORT_SYMBOL_GPL(do_take_over_console
);
3750 * give_up_console is a wrapper to unregister_con_driver. It will only
3751 * work if driver is fully unbound.
3753 void give_up_console(const struct consw
*csw
)
3756 do_unregister_con_driver(csw
);
3760 static int __init
vtconsole_class_init(void)
3764 vtconsole_class
= class_create(THIS_MODULE
, "vtconsole");
3765 if (IS_ERR(vtconsole_class
)) {
3766 printk(KERN_WARNING
"Unable to create vt console class; "
3767 "errno = %ld\n", PTR_ERR(vtconsole_class
));
3768 vtconsole_class
= NULL
;
3771 /* Add system drivers to sysfs */
3772 for (i
= 0; i
< MAX_NR_CON_DRIVER
; i
++) {
3773 struct con_driver
*con
= ®istered_con_driver
[i
];
3775 if (con
->con
&& !con
->dev
) {
3777 device_create_with_groups(vtconsole_class
, NULL
,
3778 MKDEV(0, con
->node
),
3779 con
, con_dev_groups
,
3780 "vtcon%i", con
->node
);
3782 if (IS_ERR(con
->dev
)) {
3783 printk(KERN_WARNING
"Unable to create "
3784 "device for %s; errno = %ld\n",
3785 con
->desc
, PTR_ERR(con
->dev
));
3788 vtconsole_init_device(con
);
3795 postcore_initcall(vtconsole_class_init
);
3803 static int set_vesa_blanking(char __user
*p
)
3807 if (get_user(mode
, p
+ 1))
3810 vesa_blank_mode
= (mode
< 4) ? mode
: 0;
3814 void do_blank_screen(int entering_gfx
)
3816 struct vc_data
*vc
= vc_cons
[fg_console
].d
;
3819 WARN_CONSOLE_UNLOCKED();
3821 if (console_blanked
) {
3822 if (blank_state
== blank_vesa_wait
) {
3823 blank_state
= blank_off
;
3824 vc
->vc_sw
->con_blank(vc
, vesa_blank_mode
+ 1, 0);
3829 /* entering graphics mode? */
3833 vc
->vc_sw
->con_blank(vc
, -1, 1);
3834 console_blanked
= fg_console
+ 1;
3835 blank_state
= blank_off
;
3840 if (blank_state
!= blank_normal_wait
)
3842 blank_state
= blank_off
;
3844 /* don't blank graphics */
3845 if (vc
->vc_mode
!= KD_TEXT
) {
3846 console_blanked
= fg_console
+ 1;
3851 del_timer_sync(&console_timer
);
3852 blank_timer_expired
= 0;
3855 /* In case we need to reset origin, blanking hook returns 1 */
3856 i
= vc
->vc_sw
->con_blank(vc
, vesa_off_interval
? 1 : (vesa_blank_mode
+ 1), 0);
3857 console_blanked
= fg_console
+ 1;
3861 if (console_blank_hook
&& console_blank_hook(1))
3864 if (vesa_off_interval
&& vesa_blank_mode
) {
3865 blank_state
= blank_vesa_wait
;
3866 mod_timer(&console_timer
, jiffies
+ vesa_off_interval
);
3868 vt_event_post(VT_EVENT_BLANK
, vc
->vc_num
, vc
->vc_num
);
3870 EXPORT_SYMBOL(do_blank_screen
);
3873 * Called by timer as well as from vt_console_driver
3875 void do_unblank_screen(int leaving_gfx
)
3879 /* This should now always be called from a "sane" (read: can schedule)
3880 * context for the sake of the low level drivers, except in the special
3881 * case of oops_in_progress
3883 if (!oops_in_progress
)
3886 WARN_CONSOLE_UNLOCKED();
3889 if (!console_blanked
)
3891 if (!vc_cons_allocated(fg_console
)) {
3893 pr_warn("unblank_screen: tty %d not allocated ??\n",
3897 vc
= vc_cons
[fg_console
].d
;
3898 /* Try to unblank in oops case too */
3899 if (vc
->vc_mode
!= KD_TEXT
&& !vt_force_oops_output(vc
))
3900 return; /* but leave console_blanked != 0 */
3902 if (blankinterval
) {
3903 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3904 blank_state
= blank_normal_wait
;
3907 console_blanked
= 0;
3908 if (vc
->vc_sw
->con_blank(vc
, 0, leaving_gfx
) || vt_force_oops_output(vc
))
3909 /* Low-level driver cannot restore -> do it ourselves */
3911 if (console_blank_hook
)
3912 console_blank_hook(0);
3915 vt_event_post(VT_EVENT_UNBLANK
, vc
->vc_num
, vc
->vc_num
);
3917 EXPORT_SYMBOL(do_unblank_screen
);
3920 * This is called by the outside world to cause a forced unblank, mostly for
3921 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3922 * call it with 1 as an argument and so force a mode restore... that may kill
3923 * X or at least garbage the screen but would also make the Oops visible...
3925 void unblank_screen(void)
3927 do_unblank_screen(0);
3931 * We defer the timer blanking to work queue so it can take the console mutex
3932 * (console operations can still happen at irq time, but only from printk which
3933 * has the console mutex. Not perfect yet, but better than no locking
3935 static void blank_screen_t(unsigned long dummy
)
3937 if (unlikely(!keventd_up())) {
3938 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3941 blank_timer_expired
= 1;
3942 schedule_work(&console_work
);
3945 void poke_blanked_console(void)
3947 WARN_CONSOLE_UNLOCKED();
3949 /* Add this so we quickly catch whoever might call us in a non
3950 * safe context. Nowadays, unblank_screen() isn't to be called in
3951 * atomic contexts and is allowed to schedule (with the special case
3952 * of oops_in_progress, but that isn't of any concern for this
3957 /* This isn't perfectly race free, but a race here would be mostly harmless,
3958 * at worse, we'll do a spurrious blank and it's unlikely
3960 del_timer(&console_timer
);
3961 blank_timer_expired
= 0;
3963 if (ignore_poke
|| !vc_cons
[fg_console
].d
|| vc_cons
[fg_console
].d
->vc_mode
== KD_GRAPHICS
)
3965 if (console_blanked
)
3967 else if (blankinterval
) {
3968 mod_timer(&console_timer
, jiffies
+ (blankinterval
* HZ
));
3969 blank_state
= blank_normal_wait
;
3977 static void set_palette(struct vc_data
*vc
)
3979 WARN_CONSOLE_UNLOCKED();
3981 if (vc
->vc_mode
!= KD_GRAPHICS
&& vc
->vc_sw
->con_set_palette
)
3982 vc
->vc_sw
->con_set_palette(vc
, color_table
);
3986 * Load palette into the DAC registers. arg points to a colour
3987 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3990 int con_set_cmap(unsigned char __user
*arg
)
3993 unsigned char colormap
[3*16];
3995 if (copy_from_user(colormap
, arg
, sizeof(colormap
)))
3999 for (i
= k
= 0; i
< 16; i
++) {
4000 default_red
[i
] = colormap
[k
++];
4001 default_grn
[i
] = colormap
[k
++];
4002 default_blu
[i
] = colormap
[k
++];
4004 for (i
= 0; i
< MAX_NR_CONSOLES
; i
++) {
4005 if (!vc_cons_allocated(i
))
4007 for (j
= k
= 0; j
< 16; j
++) {
4008 vc_cons
[i
].d
->vc_palette
[k
++] = default_red
[j
];
4009 vc_cons
[i
].d
->vc_palette
[k
++] = default_grn
[j
];
4010 vc_cons
[i
].d
->vc_palette
[k
++] = default_blu
[j
];
4012 set_palette(vc_cons
[i
].d
);
4019 int con_get_cmap(unsigned char __user
*arg
)
4022 unsigned char colormap
[3*16];
4025 for (i
= k
= 0; i
< 16; i
++) {
4026 colormap
[k
++] = default_red
[i
];
4027 colormap
[k
++] = default_grn
[i
];
4028 colormap
[k
++] = default_blu
[i
];
4032 if (copy_to_user(arg
, colormap
, sizeof(colormap
)))
4038 void reset_palette(struct vc_data
*vc
)
4041 for (j
=k
=0; j
<16; j
++) {
4042 vc
->vc_palette
[k
++] = default_red
[j
];
4043 vc
->vc_palette
[k
++] = default_grn
[j
];
4044 vc
->vc_palette
[k
++] = default_blu
[j
];
4052 * Currently we only support fonts up to 32 pixels wide, at a maximum height
4053 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
4054 * depending on width) reserved for each character which is kinda wasty, but
4055 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
4056 * is up to the actual low-level console-driver convert data into its favorite
4057 * format (maybe we should add a `fontoffset' field to the `display'
4058 * structure so we won't have to convert the fontdata all the time.
4062 #define max_font_size 65536
4064 static int con_font_get(struct vc_data
*vc
, struct console_font_op
*op
)
4066 struct console_font font
;
4071 font
.data
= kmalloc(max_font_size
, GFP_KERNEL
);
4078 if (vc
->vc_mode
!= KD_TEXT
)
4080 else if (vc
->vc_sw
->con_font_get
)
4081 rc
= vc
->vc_sw
->con_font_get(vc
, &font
);
4089 c
= (font
.width
+7)/8 * 32 * font
.charcount
;
4091 if (op
->data
&& font
.charcount
> op
->charcount
)
4093 if (!(op
->flags
& KD_FONT_FLAG_OLD
)) {
4094 if (font
.width
> op
->width
|| font
.height
> op
->height
)
4097 if (font
.width
!= 8)
4099 else if ((op
->height
&& font
.height
> op
->height
) ||
4106 op
->height
= font
.height
;
4107 op
->width
= font
.width
;
4108 op
->charcount
= font
.charcount
;
4110 if (op
->data
&& copy_to_user(op
->data
, font
.data
, c
))
4118 static int con_font_set(struct vc_data
*vc
, struct console_font_op
*op
)
4120 struct console_font font
;
4124 if (vc
->vc_mode
!= KD_TEXT
)
4128 if (op
->charcount
> 512)
4130 if (!op
->height
) { /* Need to guess font height [compat] */
4132 u8 __user
*charmap
= op
->data
;
4135 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
4136 so that we can get rid of this soon */
4137 if (!(op
->flags
& KD_FONT_FLAG_OLD
))
4139 for (h
= 32; h
> 0; h
--)
4140 for (i
= 0; i
< op
->charcount
; i
++) {
4141 if (get_user(tmp
, &charmap
[32*i
+h
-1]))
4150 if (op
->width
<= 0 || op
->width
> 32 || op
->height
> 32)
4152 size
= (op
->width
+7)/8 * 32 * op
->charcount
;
4153 if (size
> max_font_size
)
4155 font
.charcount
= op
->charcount
;
4156 font
.height
= op
->height
;
4157 font
.width
= op
->width
;
4158 font
.data
= memdup_user(op
->data
, size
);
4159 if (IS_ERR(font
.data
))
4160 return PTR_ERR(font
.data
);
4162 if (vc
->vc_mode
!= KD_TEXT
)
4164 else if (vc
->vc_sw
->con_font_set
)
4165 rc
= vc
->vc_sw
->con_font_set(vc
, &font
, op
->flags
);
4173 static int con_font_default(struct vc_data
*vc
, struct console_font_op
*op
)
4175 struct console_font font
= {.width
= op
->width
, .height
= op
->height
};
4176 char name
[MAX_FONT_NAME
];
4183 else if (strncpy_from_user(name
, op
->data
, MAX_FONT_NAME
- 1) < 0)
4186 name
[MAX_FONT_NAME
- 1] = 0;
4189 if (vc
->vc_mode
!= KD_TEXT
) {
4193 if (vc
->vc_sw
->con_font_default
)
4194 rc
= vc
->vc_sw
->con_font_default(vc
, &font
, s
);
4199 op
->width
= font
.width
;
4200 op
->height
= font
.height
;
4205 static int con_font_copy(struct vc_data
*vc
, struct console_font_op
*op
)
4207 int con
= op
->height
;
4212 if (vc
->vc_mode
!= KD_TEXT
)
4214 else if (!vc
->vc_sw
->con_font_copy
)
4216 else if (con
< 0 || !vc_cons_allocated(con
))
4218 else if (con
== vc
->vc_num
) /* nothing to do */
4221 rc
= vc
->vc_sw
->con_font_copy(vc
, con
);
4226 int con_font_op(struct vc_data
*vc
, struct console_font_op
*op
)
4229 case KD_FONT_OP_SET
:
4230 return con_font_set(vc
, op
);
4231 case KD_FONT_OP_GET
:
4232 return con_font_get(vc
, op
);
4233 case KD_FONT_OP_SET_DEFAULT
:
4234 return con_font_default(vc
, op
);
4235 case KD_FONT_OP_COPY
:
4236 return con_font_copy(vc
, op
);
4242 * Interface exported to selection and vcs.
4245 /* used by selection */
4246 u16
screen_glyph(struct vc_data
*vc
, int offset
)
4248 u16 w
= scr_readw(screenpos(vc
, offset
, 1));
4251 if (w
& vc
->vc_hi_font_mask
)
4255 EXPORT_SYMBOL_GPL(screen_glyph
);
4257 /* used by vcs - note the word offset */
4258 unsigned short *screen_pos(struct vc_data
*vc
, int w_offset
, int viewed
)
4260 return screenpos(vc
, 2 * w_offset
, viewed
);
4262 EXPORT_SYMBOL_GPL(screen_pos
);
4264 void getconsxy(struct vc_data
*vc
, unsigned char *p
)
4270 void putconsxy(struct vc_data
*vc
, unsigned char *p
)
4273 gotoxy(vc
, p
[0], p
[1]);
4277 u16
vcs_scr_readw(struct vc_data
*vc
, const u16
*org
)
4279 if ((unsigned long)org
== vc
->vc_pos
&& softcursor_original
!= -1)
4280 return softcursor_original
;
4281 return scr_readw(org
);
4284 void vcs_scr_writew(struct vc_data
*vc
, u16 val
, u16
*org
)
4286 scr_writew(val
, org
);
4287 if ((unsigned long)org
== vc
->vc_pos
) {
4288 softcursor_original
= -1;
4293 void vcs_scr_updated(struct vc_data
*vc
)
4299 * Visible symbols for modules
4302 EXPORT_SYMBOL(color_table
);
4303 EXPORT_SYMBOL(default_red
);
4304 EXPORT_SYMBOL(default_grn
);
4305 EXPORT_SYMBOL(default_blu
);
4306 EXPORT_SYMBOL(update_region
);
4307 EXPORT_SYMBOL(redraw_screen
);
4308 EXPORT_SYMBOL(vc_resize
);
4309 EXPORT_SYMBOL(fg_console
);
4310 EXPORT_SYMBOL(console_blank_hook
);
4311 EXPORT_SYMBOL(console_blanked
);
4312 EXPORT_SYMBOL(vc_cons
);
4313 EXPORT_SYMBOL(global_cursor_default
);
4314 #ifndef VT_SINGLE_DRIVER
4315 EXPORT_SYMBOL(give_up_console
);