2 * linux/drivers/char/vt.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * Hopefully this will be a rather complete VT102 implementation.
10 * Beeping thanks to John T Kohl.
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
38 * Original m68k console driver modifications by
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
68 #include <linux/module.h>
69 #include <linux/types.h>
70 #include <linux/sched.h>
71 #include <linux/tty.h>
72 #include <linux/tty_flip.h>
73 #include <linux/kernel.h>
74 #include <linux/string.h>
75 #include <linux/errno.h>
77 #include <linux/slab.h>
78 #include <linux/major.h>
80 #include <linux/console.h>
81 #include <linux/init.h>
82 #include <linux/devfs_fs_kernel.h>
83 #include <linux/vt_kern.h>
84 #include <linux/selection.h>
85 #include <linux/tiocl.h>
86 #include <linux/kbd_kern.h>
87 #include <linux/consolemap.h>
88 #include <linux/timer.h>
89 #include <linux/interrupt.h>
90 #include <linux/config.h>
91 #include <linux/workqueue.h>
92 #include <linux/bootmem.h>
94 #include <linux/font.h>
95 #include <linux/bitops.h>
98 #include <asm/system.h>
99 #include <asm/uaccess.h>
102 const struct consw *conswitchp;
104 /* A bitmap for codes <32. A bit of 1 indicates that the code
105 * corresponding to that bit number invokes some special action
106 * (such as cursor movement) and should not be displayed as a
107 * glyph unless the disp_ctrl mode is explicitly enabled.
109 #define CTRL_ACTION 0x0d00ff81
110 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
113 * Here is the default bell parameters: 750HZ, 1/8th of a second
115 #define DEFAULT_BELL_PITCH 750
116 #define DEFAULT_BELL_DURATION (HZ/8)
118 extern void vcs_make_devfs(struct tty_struct *tty);
119 extern void vcs_remove_devfs(struct tty_struct *tty);
121 extern void console_map_init(void);
122 #ifdef CONFIG_PROM_CONSOLE
123 extern void prom_con_init(void);
125 #ifdef CONFIG_MDA_CONSOLE
126 extern int mda_console_init(void);
129 struct vc vc_cons [MAX_NR_CONSOLES];
131 #ifndef VT_SINGLE_DRIVER
132 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
135 static int con_open(struct tty_struct *, struct file *);
136 static void vc_init(struct vc_data *vc, unsigned int rows,
137 unsigned int cols, int do_clear);
138 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
139 static void save_cur(struct vc_data *vc);
140 static void reset_terminal(struct vc_data *vc, int do_clear);
141 static void con_flush_chars(struct tty_struct *tty);
142 static void set_vesa_blanking(char __user *p);
143 static void set_cursor(struct vc_data *vc);
144 static void hide_cursor(struct vc_data *vc);
145 static void console_callback(void *ignored);
146 static void blank_screen_t(unsigned long dummy);
147 static void set_palette(struct vc_data *vc);
149 static int printable; /* Is console ready for printing? */
152 * ignore_poke: don't unblank the screen when things are typed. This is
153 * mainly for the privacy of braille terminal users.
155 static int ignore_poke;
157 int do_poke_blanked_console;
160 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
161 static int blankinterval = 10*60*HZ;
162 static int vesa_off_interval;
164 static DECLARE_WORK(console_work, console_callback, NULL);
167 * fg_console is the current virtual console,
168 * last_console is the last used one,
169 * want_console is the console we want to switch to,
170 * kmsg_redirect is the console for kernel messages,
174 int want_console = -1;
178 * For each existing display, we have a pointer to console currently visible
179 * on that display, allowing consoles other than fg_console to be refreshed
180 * appropriately. Unless the low-level driver supplies its own display_fg
181 * variable, we use this one for the "master display".
183 static struct vc_data *master_display_fg;
186 * Unfortunately, we need to delay tty echo when we're currently writing to the
187 * console since the code is (and always was) not re-entrant, so we schedule
188 * all flip requests to process context with schedule-task() and run it from
189 * console_callback().
193 * For the same reason, we defer scrollback to the console callback.
195 static int scrollback_delta;
198 * Hook so that the power management routines can (un)blank
199 * the console on our behalf.
201 int (*console_blank_hook)(int);
203 static struct timer_list console_timer;
204 static int blank_state;
205 static int blank_timer_expired;
213 * Low-Level Functions
216 #define IS_FG(vc) ((vc)->vc_num == fg_console)
218 #ifdef VT_BUF_VRAM_ONLY
219 #define DO_UPDATE(vc) 0
221 #define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
224 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
229 p = (unsigned short *)(vc->vc_origin + offset);
230 else if (!vc->vc_sw->con_screen_pos)
231 p = (unsigned short *)(vc->vc_visible_origin + offset);
233 p = vc->vc_sw->con_screen_pos(vc, offset);
237 static inline void scrolldelta(int lines)
239 scrollback_delta += lines;
240 schedule_console_callback();
243 void schedule_console_callback(void)
245 schedule_work(&console_work);
248 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
250 unsigned short *d, *s;
254 if (b > vc->vc_rows || t >= b || nr < 1)
256 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
258 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
259 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
260 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
261 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
262 vc->vc_size_row * nr);
265 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
272 if (b > vc->vc_rows || t >= b || nr < 1)
274 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
276 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
277 step = vc->vc_cols * nr;
278 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
279 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
282 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
284 #ifndef VT_BUF_VRAM_ONLY
285 unsigned int xx, yy, offset;
289 if (!vc->vc_sw->con_getxy) {
290 offset = (start - vc->vc_origin) / 2;
291 xx = offset % vc->vc_cols;
292 yy = offset / vc->vc_cols;
295 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
299 u16 attrib = scr_readw(p) & 0xff00;
302 while (xx < vc->vc_cols && count) {
303 if (attrib != (scr_readw(p) & 0xff00)) {
305 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
308 attrib = scr_readw(p) & 0xff00;
315 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
320 if (vc->vc_sw->con_getxy) {
322 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
328 void update_region(struct vc_data *vc, unsigned long start, int count)
330 WARN_CONSOLE_UNLOCKED();
334 do_update_region(vc, start, count);
339 /* Structure of attributes is hardware-dependent */
341 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse)
343 if (vc->vc_sw->con_build_attr)
344 return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse);
346 #ifndef VT_BUF_VRAM_ONLY
348 * ++roman: I completely changed the attribute format for monochrome
349 * mode (!can_do_color). The formerly used MDA (monochrome display
350 * adapter) format didn't allow the combination of certain effects.
351 * Now the attribute is just a bit vector:
352 * Bit 0..1: intensity (0..2)
359 if (!vc->vc_can_do_color)
361 (_underline ? 4 : 0) |
365 a = (a & 0xf0) | vc->vc_ulcolor;
366 else if (_intensity == 0)
367 a = (a & 0xf0) | vc->vc_ulcolor;
369 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
374 if (vc->vc_hi_font_mask == 0x100)
383 static void update_attr(struct vc_data *vc)
385 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm);
386 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' ';
389 /* Note: inverting the screen twice should revert to the original state */
390 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
394 WARN_CONSOLE_UNLOCKED();
397 p = screenpos(vc, offset, viewed);
398 if (vc->vc_sw->con_invert_region)
399 vc->vc_sw->con_invert_region(vc, p, count);
400 #ifndef VT_BUF_VRAM_ONLY
406 if (!vc->vc_can_do_color) {
413 } else if (vc->vc_hi_font_mask == 0x100) {
416 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
423 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
431 do_update_region(vc, (unsigned long) p, count);
434 /* used by selection: complement pointer position */
435 void complement_pos(struct vc_data *vc, int offset)
437 static int old_offset = -1;
438 static unsigned short old;
439 static unsigned short oldx, oldy;
441 WARN_CONSOLE_UNLOCKED();
443 if (old_offset != -1 && old_offset >= 0 &&
444 old_offset < vc->vc_screenbuf_size) {
445 scr_writew(old, screenpos(vc, old_offset, 1));
447 vc->vc_sw->con_putc(vc, old, oldy, oldx);
452 if (offset != -1 && offset >= 0 &&
453 offset < vc->vc_screenbuf_size) {
456 p = screenpos(vc, offset, 1);
458 new = old ^ vc->vc_complement_mask;
461 oldx = (offset >> 1) % vc->vc_cols;
462 oldy = (offset >> 1) / vc->vc_cols;
463 vc->vc_sw->con_putc(vc, new, oldy, oldx);
469 static void insert_char(struct vc_data *vc, unsigned int nr)
471 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
473 p = q + vc->vc_cols - nr - vc->vc_x;
475 scr_writew(scr_readw(p), p + nr);
476 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
477 vc->vc_need_wrap = 0;
479 unsigned short oldattr = vc->vc_attr;
480 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
481 vc->vc_cols - vc->vc_x - nr);
482 vc->vc_attr = vc->vc_video_erase_char >> 8;
484 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
485 vc->vc_attr = oldattr;
489 static void delete_char(struct vc_data *vc, unsigned int nr)
491 unsigned int i = vc->vc_x;
492 unsigned short *p = (unsigned short *)vc->vc_pos;
494 while (++i <= vc->vc_cols - nr) {
495 scr_writew(scr_readw(p+nr), p);
498 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
499 vc->vc_need_wrap = 0;
501 unsigned short oldattr = vc->vc_attr;
502 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
503 vc->vc_cols - vc->vc_x - nr);
504 vc->vc_attr = vc->vc_video_erase_char >> 8;
506 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
507 vc->vc_cols - 1 - nr);
508 vc->vc_attr = oldattr;
512 static int softcursor_original;
514 static void add_softcursor(struct vc_data *vc)
516 int i = scr_readw((u16 *) vc->vc_pos);
517 u32 type = vc->vc_cursor_type;
519 if (! (type & 0x10)) return;
520 if (softcursor_original != -1) return;
521 softcursor_original = i;
522 i |= ((type >> 8) & 0xff00 );
523 i ^= ((type) & 0xff00 );
524 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
525 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
526 scr_writew(i, (u16 *) vc->vc_pos);
528 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
531 static void hide_softcursor(struct vc_data *vc)
533 if (softcursor_original != -1) {
534 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
536 vc->vc_sw->con_putc(vc, softcursor_original,
538 softcursor_original = -1;
542 static void hide_cursor(struct vc_data *vc)
546 vc->vc_sw->con_cursor(vc, CM_ERASE);
550 static void set_cursor(struct vc_data *vc)
552 if (!IS_FG(vc) || console_blanked ||
553 vc->vc_mode == KD_GRAPHICS)
559 if ((vc->vc_cursor_type & 0x0f) != 1)
560 vc->vc_sw->con_cursor(vc, CM_DRAW);
565 static void set_origin(struct vc_data *vc)
567 WARN_CONSOLE_UNLOCKED();
569 if (!CON_IS_VISIBLE(vc) ||
570 !vc->vc_sw->con_set_origin ||
571 !vc->vc_sw->con_set_origin(vc))
572 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
573 vc->vc_visible_origin = vc->vc_origin;
574 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
575 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
578 static inline void save_screen(struct vc_data *vc)
580 WARN_CONSOLE_UNLOCKED();
582 if (vc->vc_sw->con_save_screen)
583 vc->vc_sw->con_save_screen(vc);
587 * Redrawing of screen
590 static void clear_buffer_attributes(struct vc_data *vc)
592 unsigned short *p = (unsigned short *)vc->vc_origin;
593 int count = vc->vc_screenbuf_size / 2;
594 int mask = vc->vc_hi_font_mask | 0xff;
596 for (; count > 0; count--, p++) {
597 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
601 void redraw_screen(struct vc_data *vc, int is_switch)
605 WARN_CONSOLE_UNLOCKED();
609 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
614 struct vc_data *old_vc = vc_cons[fg_console].d;
617 if (!CON_IS_VISIBLE(vc))
619 *vc->vc_display_fg = vc;
620 fg_console = vc->vc_num;
622 if (!CON_IS_VISIBLE(old_vc)) {
633 int old_was_color = vc->vc_can_do_color;
636 update = vc->vc_sw->con_switch(vc);
639 * If console changed from mono<->color, the best we can do
640 * is to clear the buffer attributes. As it currently stands,
641 * rebuilding new attributes from the old buffer is not doable
642 * without overly complex code.
644 if (old_was_color != vc->vc_can_do_color) {
646 clear_buffer_attributes(vc);
648 if (update && vc->vc_mode != KD_GRAPHICS)
649 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
654 compute_shiftstate();
659 * Allocation, freeing and resizing of VTs.
662 int vc_cons_allocated(unsigned int i)
664 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
667 static void visual_init(struct vc_data *vc, int num, int init)
669 /* ++Geert: vc->vc_sw->con_init determines console size */
671 module_put(vc->vc_sw->owner);
672 vc->vc_sw = conswitchp;
673 #ifndef VT_SINGLE_DRIVER
674 if (con_driver_map[num])
675 vc->vc_sw = con_driver_map[num];
677 __module_get(vc->vc_sw->owner);
679 vc->vc_display_fg = &master_display_fg;
680 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
681 vc->vc_uni_pagedir = 0;
682 vc->vc_hi_font_mask = 0;
683 vc->vc_complement_mask = 0;
684 vc->vc_can_do_color = 0;
685 vc->vc_sw->con_init(vc, init);
686 if (!vc->vc_complement_mask)
687 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
688 vc->vc_s_complement_mask = vc->vc_complement_mask;
689 vc->vc_size_row = vc->vc_cols << 1;
690 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
693 int vc_allocate(unsigned int currcons) /* return 0 on success */
695 WARN_CONSOLE_UNLOCKED();
697 if (currcons >= MAX_NR_CONSOLES)
699 if (!vc_cons[currcons].d) {
702 /* prevent users from taking too much memory */
703 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
706 /* due to the granularity of kmalloc, we waste some memory here */
707 /* the alloc is done in two steps, to optimize the common situation
708 of a 25x80 console (structsize=216, screenbuf_size=4000) */
709 /* although the numbers above are not valid since long ago, the
710 point is still up-to-date and the comment still has its value
711 even if only as a historical artifact. --mj, July 1998 */
712 vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL);
715 memset(vc, 0, sizeof(*vc));
716 vc_cons[currcons].d = vc;
717 visual_init(vc, currcons, 1);
718 if (!*vc->vc_uni_pagedir_loc)
719 con_set_default_unimap(vc);
720 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
721 if (!vc->vc_screenbuf) {
723 vc_cons[currcons].d = NULL;
726 vc->vc_kmalloced = 1;
727 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
732 static inline int resize_screen(struct vc_data *vc, int width, int height)
734 /* Resizes the resolution of the display adapater */
737 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
738 err = vc->vc_sw->con_resize(vc, width, height);
743 * Change # of rows and columns (0 means unchanged/the size of fg_console)
744 * [this is to be used together with some user program
745 * like resize that changes the hardware videomode]
747 #define VC_RESIZE_MAXCOL (32767)
748 #define VC_RESIZE_MAXROW (32767)
749 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
751 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
752 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
753 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
755 unsigned short *newscreen;
757 WARN_CONSOLE_UNLOCKED();
762 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
765 new_cols = (cols ? cols : vc->vc_cols);
766 new_rows = (lines ? lines : vc->vc_rows);
767 new_row_size = new_cols << 1;
768 new_screen_size = new_row_size * new_rows;
770 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
773 newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER);
777 old_rows = vc->vc_rows;
778 old_cols = vc->vc_cols;
779 old_row_size = vc->vc_size_row;
780 old_screen_size = vc->vc_screenbuf_size;
782 err = resize_screen(vc, new_cols, new_rows);
788 vc->vc_rows = new_rows;
789 vc->vc_cols = new_cols;
790 vc->vc_size_row = new_row_size;
791 vc->vc_screenbuf_size = new_screen_size;
793 rlth = min(old_row_size, new_row_size);
794 rrem = new_row_size - rlth;
795 old_origin = vc->vc_origin;
796 new_origin = (long) newscreen;
797 new_scr_end = new_origin + new_screen_size;
799 if (vc->vc_y > new_rows) {
800 if (old_rows - vc->vc_y < new_rows) {
802 * Cursor near the bottom, copy contents from the
805 old_origin += (old_rows - new_rows) * old_row_size;
806 end = vc->vc_scr_end;
809 * Cursor is in no man's land, copy 1/2 screenful
810 * from the top and bottom of cursor position
812 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
813 end = old_origin + new_screen_size;
817 * Cursor near the top, copy contents from the top of buffer
819 end = (old_rows > new_rows) ? old_origin + new_screen_size :
824 while (old_origin < end) {
825 scr_memcpyw((unsigned short *) new_origin,
826 (unsigned short *) old_origin, rlth);
828 scr_memsetw((void *)(new_origin + rlth),
829 vc->vc_video_erase_char, rrem);
830 old_origin += old_row_size;
831 new_origin += new_row_size;
833 if (new_scr_end > new_origin)
834 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
835 new_scr_end - new_origin);
836 if (vc->vc_kmalloced)
837 kfree(vc->vc_screenbuf);
838 vc->vc_screenbuf = newscreen;
839 vc->vc_kmalloced = 1;
840 vc->vc_screenbuf_size = new_screen_size;
843 /* do part of a reset_terminal() */
845 vc->vc_bottom = vc->vc_rows;
846 gotoxy(vc, vc->vc_x, vc->vc_y);
850 struct winsize ws, *cws = &vc->vc_tty->winsize;
852 memset(&ws, 0, sizeof(ws));
853 ws.ws_row = vc->vc_rows;
854 ws.ws_col = vc->vc_cols;
855 ws.ws_ypixel = vc->vc_scan_lines;
856 if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
857 vc->vc_tty->pgrp > 0)
858 kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1);
862 if (CON_IS_VISIBLE(vc))
868 void vc_disallocate(unsigned int currcons)
870 WARN_CONSOLE_UNLOCKED();
872 if (vc_cons_allocated(currcons)) {
873 struct vc_data *vc = vc_cons[currcons].d;
874 vc->vc_sw->con_deinit(vc);
875 if (vc->vc_kmalloced)
876 kfree(vc->vc_screenbuf);
877 if (currcons >= MIN_NR_CONSOLES)
879 vc_cons[currcons].d = NULL;
887 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
888 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
889 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
891 #define decarm VC_REPEAT
892 #define decckm VC_CKMODE
893 #define kbdapplic VC_APPLIC
897 * this is what the terminal answers to a ESC-Z or csi0c query.
899 #define VT100ID "\033[?1;2c"
900 #define VT102ID "\033[?6c"
902 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
903 8,12,10,14, 9,13,11,15 };
905 /* the default colour table, for VGA+ colour systems */
906 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
907 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
908 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
909 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
910 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
911 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
914 * gotoxy() must verify all boundaries, because the arguments
915 * might also be negative. If the given position is out of
916 * bounds, the cursor is placed at the nearest margin.
918 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
925 if (new_x >= vc->vc_cols)
926 vc->vc_x = vc->vc_cols - 1;
933 max_y = vc->vc_bottom;
940 else if (new_y >= max_y)
941 vc->vc_y = max_y - 1;
944 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
945 vc->vc_need_wrap = 0;
948 /* for absolute user moves, when decom is set */
949 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
951 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
954 void scrollback(struct vc_data *vc, int lines)
957 lines = vc->vc_rows / 2;
961 void scrollfront(struct vc_data *vc, int lines)
964 lines = vc->vc_rows / 2;
968 static void lf(struct vc_data *vc)
970 /* don't scroll if above bottom of scrolling region, or
971 * if below scrolling region
973 if (vc->vc_y + 1 == vc->vc_bottom)
974 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
975 else if (vc->vc_y < vc->vc_rows - 1) {
977 vc->vc_pos += vc->vc_size_row;
979 vc->vc_need_wrap = 0;
982 static void ri(struct vc_data *vc)
984 /* don't scroll if below top of scrolling region, or
985 * if above scrolling region
987 if (vc->vc_y == vc->vc_top)
988 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
989 else if (vc->vc_y > 0) {
991 vc->vc_pos -= vc->vc_size_row;
993 vc->vc_need_wrap = 0;
996 static inline void cr(struct vc_data *vc)
998 vc->vc_pos -= vc->vc_x << 1;
999 vc->vc_need_wrap = vc->vc_x = 0;
1002 static inline void bs(struct vc_data *vc)
1007 vc->vc_need_wrap = 0;
1011 static inline void del(struct vc_data *vc)
1016 static void csi_J(struct vc_data *vc, int vpar)
1019 unsigned short * start;
1022 case 0: /* erase from cursor to end of display */
1023 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1024 start = (unsigned short *)vc->vc_pos;
1025 if (DO_UPDATE(vc)) {
1026 /* do in two stages */
1027 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1028 vc->vc_cols - vc->vc_x);
1029 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1030 vc->vc_rows - vc->vc_y - 1,
1034 case 1: /* erase from start to cursor */
1035 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1036 start = (unsigned short *)vc->vc_origin;
1037 if (DO_UPDATE(vc)) {
1038 /* do in two stages */
1039 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1041 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1045 case 2: /* erase whole display */
1046 count = vc->vc_cols * vc->vc_rows;
1047 start = (unsigned short *)vc->vc_origin;
1049 vc->vc_sw->con_clear(vc, 0, 0,
1056 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1057 vc->vc_need_wrap = 0;
1060 static void csi_K(struct vc_data *vc, int vpar)
1063 unsigned short * start;
1066 case 0: /* erase from cursor to end of line */
1067 count = vc->vc_cols - vc->vc_x;
1068 start = (unsigned short *)vc->vc_pos;
1070 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1071 vc->vc_cols - vc->vc_x);
1073 case 1: /* erase from start of line to cursor */
1074 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1075 count = vc->vc_x + 1;
1077 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1080 case 2: /* erase whole line */
1081 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1082 count = vc->vc_cols;
1084 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1090 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1091 vc->vc_need_wrap = 0;
1094 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1100 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1102 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1104 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1105 vc->vc_need_wrap = 0;
1108 static void default_attr(struct vc_data *vc)
1110 vc->vc_intensity = 1;
1111 vc->vc_underline = 0;
1114 vc->vc_color = vc->vc_def_color;
1117 /* console_sem is held */
1118 static void csi_m(struct vc_data *vc)
1122 for (i = 0; i <= vc->vc_npar; i++)
1123 switch (vc->vc_par[i]) {
1124 case 0: /* all attributes off */
1128 vc->vc_intensity = 2;
1131 vc->vc_intensity = 0;
1134 vc->vc_underline = 1;
1142 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1143 * Select primary font, don't display
1144 * control chars if defined, don't set
1147 vc->vc_translate = set_translate(vc->vc_charset == 0
1149 : vc->vc_G1_charset, vc);
1150 vc->vc_disp_ctrl = 0;
1151 vc->vc_toggle_meta = 0;
1153 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1154 * Select first alternate font, lets
1155 * chars < 32 be displayed as ROM chars.
1157 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1158 vc->vc_disp_ctrl = 1;
1159 vc->vc_toggle_meta = 0;
1161 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1162 * Select second alternate font, toggle
1163 * high bit before displaying as ROM char.
1165 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1166 vc->vc_disp_ctrl = 1;
1167 vc->vc_toggle_meta = 1;
1171 vc->vc_intensity = 1;
1174 vc->vc_underline = 0;
1182 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1183 * Enables underscore, white foreground
1184 * with white underscore (Linux - use
1185 * default foreground).
1187 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1188 vc->vc_underline = 1;
1190 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1191 * Disable underline option.
1192 * Reset colour to default? It did this
1195 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1196 vc->vc_underline = 0;
1199 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1202 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1203 vc->vc_color = color_table[vc->vc_par[i] - 30]
1204 | (vc->vc_color & 0xf0);
1205 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1206 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1207 | (vc->vc_color & 0x0f);
1213 static void respond_string(const char *p, struct tty_struct *tty)
1216 tty_insert_flip_char(tty, *p, 0);
1219 con_schedule_flip(tty);
1222 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1226 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1227 respond_string(buf, tty);
1230 static inline void status_report(struct tty_struct *tty)
1232 respond_string("\033[0n", tty); /* Terminal ok */
1235 static inline void respond_ID(struct tty_struct * tty)
1237 respond_string(VT102ID, tty);
1240 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1244 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1246 respond_string(buf, tty);
1249 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1250 int mouse_reporting(void)
1252 return vc_cons[fg_console].d->vc_report_mouse;
1255 /* console_sem is held */
1256 static void set_mode(struct vc_data *vc, int on_off)
1260 for (i = 0; i <= vc->vc_npar; i++)
1262 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1263 case 1: /* Cursor keys send ^[Ox/^[[x */
1265 set_kbd(vc, decckm);
1267 clr_kbd(vc, decckm);
1269 case 3: /* 80/132 mode switch unimplemented */
1270 vc->vc_deccolm = on_off;
1272 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1273 /* this alone does not suffice; some user mode
1274 utility has to change the hardware regs */
1277 case 5: /* Inverted screen on/off */
1278 if (vc->vc_decscnm != on_off) {
1279 vc->vc_decscnm = on_off;
1280 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1284 case 6: /* Origin relative/absolute */
1285 vc->vc_decom = on_off;
1288 case 7: /* Autowrap on/off */
1289 vc->vc_decawm = on_off;
1291 case 8: /* Autorepeat on/off */
1293 set_kbd(vc, decarm);
1295 clr_kbd(vc, decarm);
1298 vc->vc_report_mouse = on_off ? 1 : 0;
1300 case 25: /* Cursor on/off */
1301 vc->vc_deccm = on_off;
1304 vc->vc_report_mouse = on_off ? 2 : 0;
1308 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1309 case 3: /* Monitor (display ctrls) */
1310 vc->vc_disp_ctrl = on_off;
1312 case 4: /* Insert Mode on/off */
1313 vc->vc_decim = on_off;
1315 case 20: /* Lf, Enter == CrLf/Lf */
1325 /* console_sem is held */
1326 static void setterm_command(struct vc_data *vc)
1328 switch(vc->vc_par[0]) {
1329 case 1: /* set color for underline mode */
1330 if (vc->vc_can_do_color &&
1331 vc->vc_par[1] < 16) {
1332 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1333 if (vc->vc_underline)
1337 case 2: /* set color for half intensity mode */
1338 if (vc->vc_can_do_color &&
1339 vc->vc_par[1] < 16) {
1340 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1341 if (vc->vc_intensity == 0)
1345 case 8: /* store colors as defaults */
1346 vc->vc_def_color = vc->vc_attr;
1347 if (vc->vc_hi_font_mask == 0x100)
1348 vc->vc_def_color >>= 1;
1352 case 9: /* set blanking interval */
1353 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1354 poke_blanked_console();
1356 case 10: /* set bell frequency in Hz */
1357 if (vc->vc_npar >= 1)
1358 vc->vc_bell_pitch = vc->vc_par[1];
1360 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1362 case 11: /* set bell duration in msec */
1363 if (vc->vc_npar >= 1)
1364 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1365 vc->vc_par[1] * HZ / 1000 : 0;
1367 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1369 case 12: /* bring specified console to the front */
1370 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1371 set_console(vc->vc_par[1] - 1);
1373 case 13: /* unblank the screen */
1374 poke_blanked_console();
1376 case 14: /* set vesa powerdown interval */
1377 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1379 case 15: /* activate the previous console */
1380 set_console(last_console);
1385 /* console_sem is held */
1386 static void csi_at(struct vc_data *vc, unsigned int nr)
1388 if (nr > vc->vc_cols - vc->vc_x)
1389 nr = vc->vc_cols - vc->vc_x;
1392 insert_char(vc, nr);
1395 /* console_sem is held */
1396 static void csi_L(struct vc_data *vc, unsigned int nr)
1398 if (nr > vc->vc_rows - vc->vc_y)
1399 nr = vc->vc_rows - vc->vc_y;
1402 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1403 vc->vc_need_wrap = 0;
1406 /* console_sem is held */
1407 static void csi_P(struct vc_data *vc, unsigned int nr)
1409 if (nr > vc->vc_cols - vc->vc_x)
1410 nr = vc->vc_cols - vc->vc_x;
1413 delete_char(vc, nr);
1416 /* console_sem is held */
1417 static void csi_M(struct vc_data *vc, unsigned int nr)
1419 if (nr > vc->vc_rows - vc->vc_y)
1420 nr = vc->vc_rows - vc->vc_y;
1423 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1424 vc->vc_need_wrap = 0;
1427 /* console_sem is held (except via vc_init->reset_terminal */
1428 static void save_cur(struct vc_data *vc)
1430 vc->vc_saved_x = vc->vc_x;
1431 vc->vc_saved_y = vc->vc_y;
1432 vc->vc_s_intensity = vc->vc_intensity;
1433 vc->vc_s_underline = vc->vc_underline;
1434 vc->vc_s_blink = vc->vc_blink;
1435 vc->vc_s_reverse = vc->vc_reverse;
1436 vc->vc_s_charset = vc->vc_charset;
1437 vc->vc_s_color = vc->vc_color;
1438 vc->vc_saved_G0 = vc->vc_G0_charset;
1439 vc->vc_saved_G1 = vc->vc_G1_charset;
1442 /* console_sem is held */
1443 static void restore_cur(struct vc_data *vc)
1445 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1446 vc->vc_intensity = vc->vc_s_intensity;
1447 vc->vc_underline = vc->vc_s_underline;
1448 vc->vc_blink = vc->vc_s_blink;
1449 vc->vc_reverse = vc->vc_s_reverse;
1450 vc->vc_charset = vc->vc_s_charset;
1451 vc->vc_color = vc->vc_s_color;
1452 vc->vc_G0_charset = vc->vc_saved_G0;
1453 vc->vc_G1_charset = vc->vc_saved_G1;
1454 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1456 vc->vc_need_wrap = 0;
1459 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1460 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1463 /* console_sem is held (except via vc_init()) */
1464 static void reset_terminal(struct vc_data *vc, int do_clear)
1467 vc->vc_bottom = vc->vc_rows;
1468 vc->vc_state = ESnormal;
1470 vc->vc_translate = set_translate(LAT1_MAP, vc);
1471 vc->vc_G0_charset = LAT1_MAP;
1472 vc->vc_G1_charset = GRAF_MAP;
1474 vc->vc_need_wrap = 0;
1475 vc->vc_report_mouse = 0;
1477 vc->vc_utf_count = 0;
1479 vc->vc_disp_ctrl = 0;
1480 vc->vc_toggle_meta = 0;
1488 set_kbd(vc, decarm);
1489 clr_kbd(vc, decckm);
1490 clr_kbd(vc, kbdapplic);
1492 kbd_table[vc->vc_num].lockstate = 0;
1493 kbd_table[vc->vc_num].slockstate = 0;
1494 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1495 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1496 /* do not do set_leds here because this causes an endless tasklet loop
1497 when the keyboard hasn't been initialized yet */
1499 vc->vc_cursor_type = CUR_DEFAULT;
1500 vc->vc_complement_mask = vc->vc_s_complement_mask;
1505 vc->vc_tab_stop[0] = 0x01010100;
1506 vc->vc_tab_stop[1] =
1507 vc->vc_tab_stop[2] =
1508 vc->vc_tab_stop[3] =
1509 vc->vc_tab_stop[4] = 0x01010101;
1511 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1512 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1520 /* console_sem is held */
1521 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1524 * Control characters can be used in the _middle_
1525 * of an escape sequence.
1531 if (vc->vc_bell_duration)
1532 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1538 vc->vc_pos -= (vc->vc_x << 1);
1539 while (vc->vc_x < vc->vc_cols - 1) {
1541 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1544 vc->vc_pos += (vc->vc_x << 1);
1546 case 10: case 11: case 12:
1548 if (!is_kbd(vc, lnm))
1555 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1556 vc->vc_disp_ctrl = 1;
1560 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1561 vc->vc_disp_ctrl = 0;
1564 vc->vc_state = ESnormal;
1567 vc->vc_state = ESesc;
1573 vc->vc_state = ESsquare;
1576 switch(vc->vc_state) {
1578 vc->vc_state = ESnormal;
1581 vc->vc_state = ESsquare;
1584 vc->vc_state = ESnonstd;
1587 vc->vc_state = ESpercent;
1600 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1612 vc->vc_state = ESsetG0;
1615 vc->vc_state = ESsetG1;
1618 vc->vc_state = EShash;
1621 reset_terminal(vc, 1);
1623 case '>': /* Numeric keypad */
1624 clr_kbd(vc, kbdapplic);
1626 case '=': /* Appl. keypad */
1627 set_kbd(vc, kbdapplic);
1632 if (c=='P') { /* palette escape sequence */
1633 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1634 vc->vc_par[vc->vc_npar] = 0;
1636 vc->vc_state = ESpalette;
1638 } else if (c=='R') { /* reset palette */
1640 vc->vc_state = ESnormal;
1642 vc->vc_state = ESnormal;
1645 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1646 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1647 if (vc->vc_npar == 7) {
1648 int i = vc->vc_par[0] * 3, j = 1;
1649 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1650 vc->vc_palette[i++] += vc->vc_par[j++];
1651 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1652 vc->vc_palette[i++] += vc->vc_par[j++];
1653 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1654 vc->vc_palette[i] += vc->vc_par[j];
1656 vc->vc_state = ESnormal;
1659 vc->vc_state = ESnormal;
1662 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1663 vc->vc_par[vc->vc_npar] = 0;
1665 vc->vc_state = ESgetpars;
1666 if (c == '[') { /* Function key */
1667 vc->vc_state=ESfunckey;
1670 vc->vc_ques = (c == '?');
1674 if (c == ';' && vc->vc_npar < NPAR - 1) {
1677 } else if (c>='0' && c<='9') {
1678 vc->vc_par[vc->vc_npar] *= 10;
1679 vc->vc_par[vc->vc_npar] += c - '0';
1682 vc->vc_state = ESgotpars;
1684 vc->vc_state = ESnormal;
1695 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1697 vc->vc_cursor_type = CUR_DEFAULT;
1705 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1707 vc->vc_complement_mask = vc->vc_s_complement_mask;
1713 if (vc->vc_par[0] == 5)
1715 else if (vc->vc_par[0] == 6)
1716 cursor_report(vc, tty);
1728 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1733 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1738 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1743 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1748 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1753 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1758 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1763 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1770 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1773 csi_J(vc, vc->vc_par[0]);
1776 csi_K(vc, vc->vc_par[0]);
1779 csi_L(vc, vc->vc_par[0]);
1782 csi_M(vc, vc->vc_par[0]);
1785 csi_P(vc, vc->vc_par[0]);
1793 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1794 else if (vc->vc_par[0] == 3) {
1795 vc->vc_tab_stop[0] =
1796 vc->vc_tab_stop[1] =
1797 vc->vc_tab_stop[2] =
1798 vc->vc_tab_stop[3] =
1799 vc->vc_tab_stop[4] = 0;
1805 case 'q': /* DECLL - but only 3 leds */
1806 /* map 0,1,2,3 to 0,1,2,4 */
1807 if (vc->vc_par[0] < 4)
1808 setledstate(kbd_table + vc->vc_num,
1809 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1815 vc->vc_par[1] = vc->vc_rows;
1816 /* Minimum allowed region is 2 lines */
1817 if (vc->vc_par[0] < vc->vc_par[1] &&
1818 vc->vc_par[1] <= vc->vc_rows) {
1819 vc->vc_top = vc->vc_par[0] - 1;
1820 vc->vc_bottom = vc->vc_par[1];
1831 csi_X(vc, vc->vc_par[0]);
1834 csi_at(vc, vc->vc_par[0]);
1836 case ']': /* setterm functions */
1837 setterm_command(vc);
1842 vc->vc_state = ESnormal;
1844 case '@': /* defined in ISO 2022 */
1847 case 'G': /* prelim official escape code */
1848 case '8': /* retained for compatibility */
1854 vc->vc_state = ESnormal;
1857 vc->vc_state = ESnormal;
1859 /* DEC screen alignment test. kludge :-) */
1860 vc->vc_video_erase_char =
1861 (vc->vc_video_erase_char & 0xff00) | 'E';
1863 vc->vc_video_erase_char =
1864 (vc->vc_video_erase_char & 0xff00) | ' ';
1865 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
1870 vc->vc_G0_charset = GRAF_MAP;
1872 vc->vc_G0_charset = LAT1_MAP;
1874 vc->vc_G0_charset = IBMPC_MAP;
1876 vc->vc_G0_charset = USER_MAP;
1877 if (vc->vc_charset == 0)
1878 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1879 vc->vc_state = ESnormal;
1883 vc->vc_G1_charset = GRAF_MAP;
1885 vc->vc_G1_charset = LAT1_MAP;
1887 vc->vc_G1_charset = IBMPC_MAP;
1889 vc->vc_G1_charset = USER_MAP;
1890 if (vc->vc_charset == 1)
1891 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1892 vc->vc_state = ESnormal;
1895 vc->vc_state = ESnormal;
1899 /* This is a temporary buffer used to prepare a tty console write
1900 * so that we can easily avoid touching user space while holding the
1901 * console spinlock. It is allocated in con_init and is shared by
1902 * this code and the vc_screen read/write tty calls.
1904 * We have to allocate this statically in the kernel data section
1905 * since console_init (and thus con_init) are called before any
1906 * kernel memory allocation is available.
1908 char con_buf[CON_BUF_SIZE];
1909 DECLARE_MUTEX(con_buf_sem);
1911 /* acquires console_sem */
1912 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
1914 #ifdef VT_BUF_VRAM_ONLY
1915 #define FLUSH do { } while(0);
1917 #define FLUSH if (draw_x >= 0) { \
1918 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
1923 int c, tc, ok, n = 0, draw_x = -1;
1924 unsigned int currcons;
1925 unsigned long draw_from = 0, draw_to = 0;
1927 u16 himask, charmask;
1928 const unsigned char *orig_buf = NULL;
1936 acquire_console_sem();
1937 vc = tty->driver_data;
1939 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
1940 release_console_sem();
1944 currcons = vc->vc_num;
1945 if (!vc_cons_allocated(currcons)) {
1946 /* could this happen? */
1947 static int error = 0;
1950 printk("con_write: tty %d not allocated\n", currcons+1);
1952 release_console_sem();
1955 release_console_sem();
1960 /* At this point 'buf' is guaranteed to be a kernel buffer
1961 * and therefore no access to userspace (and therefore sleeping)
1962 * will be needed. The con_buf_sem serializes all tty based
1963 * console rendering and vcs write/read operations. We hold
1964 * the console spinlock during the entire write.
1967 acquire_console_sem();
1969 vc = tty->driver_data;
1971 printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
1972 release_console_sem();
1976 himask = vc->vc_hi_font_mask;
1977 charmask = himask ? 0x1ff : 0xff;
1979 /* undraw cursor first */
1983 while (!tty->stopped && count) {
1990 /* Do no translation at all in control states */
1991 if (vc->vc_state != ESnormal) {
1993 } else if (vc->vc_utf) {
1994 /* Combine UTF-8 into Unicode */
1995 /* Incomplete characters silently ignored */
1997 if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) {
1998 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2000 if (vc->vc_utf_count == 0)
2001 tc = c = vc->vc_utf_char;
2004 if ((c & 0xe0) == 0xc0) {
2005 vc->vc_utf_count = 1;
2006 vc->vc_utf_char = (c & 0x1f);
2007 } else if ((c & 0xf0) == 0xe0) {
2008 vc->vc_utf_count = 2;
2009 vc->vc_utf_char = (c & 0x0f);
2010 } else if ((c & 0xf8) == 0xf0) {
2011 vc->vc_utf_count = 3;
2012 vc->vc_utf_char = (c & 0x07);
2013 } else if ((c & 0xfc) == 0xf8) {
2014 vc->vc_utf_count = 4;
2015 vc->vc_utf_char = (c & 0x03);
2016 } else if ((c & 0xfe) == 0xfc) {
2017 vc->vc_utf_count = 5;
2018 vc->vc_utf_char = (c & 0x01);
2020 vc->vc_utf_count = 0;
2025 vc->vc_utf_count = 0;
2027 } else { /* no utf */
2028 tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
2031 /* If the original code was a control character we
2032 * only allow a glyph to be displayed if the code is
2033 * not normally used (such as for cursor movement) or
2034 * if the disp_ctrl mode has been explicitly enabled.
2035 * Certain characters (as given by the CTRL_ALWAYS
2036 * bitmap) are always displayed as control characters,
2037 * as the console would be pretty useless without
2038 * them; to display an arbitrary font position use the
2039 * direct-to-font zone in UTF-8 mode.
2041 ok = tc && (c >= 32 ||
2042 (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS
2043 : CTRL_ACTION) >> c) & 1)))
2044 && (c != 127 || vc->vc_disp_ctrl)
2047 if (vc->vc_state == ESnormal && ok) {
2048 /* Now try to find out how to display it */
2049 tc = conv_uni_to_pc(vc, tc);
2051 /* If we got -4 (not found) then see if we have
2052 defined a replacement character (U+FFFD) */
2053 tc = conv_uni_to_pc(vc, 0xfffd);
2055 /* One reason for the -4 can be that we just
2056 did a clear_unimap();
2057 try at least to show something. */
2060 } else if ( tc == -3 ) {
2061 /* Bad hash table -- hope for the best */
2065 continue; /* Conversion failed */
2067 if (vc->vc_need_wrap || vc->vc_decim)
2069 if (vc->vc_need_wrap) {
2076 ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2077 (vc->vc_attr << 8) + tc,
2078 (u16 *) vc->vc_pos);
2079 if (DO_UPDATE(vc) && draw_x < 0) {
2081 draw_from = vc->vc_pos;
2083 if (vc->vc_x == vc->vc_cols - 1) {
2084 vc->vc_need_wrap = vc->vc_decawm;
2085 draw_to = vc->vc_pos + 2;
2088 draw_to = (vc->vc_pos += 2);
2093 do_con_trol(tty, vc, orig);
2096 console_conditional_schedule();
2097 release_console_sem();
2105 * This is the console switching callback.
2107 * Doing console switching in a process context allows
2108 * us to do the switches asynchronously (needed when we want
2109 * to switch due to a keyboard interrupt). Synchronization
2110 * with other console code and prevention of re-entrancy is
2111 * ensured with console_sem.
2113 static void console_callback(void *ignored)
2115 acquire_console_sem();
2117 if (want_console >= 0) {
2118 if (want_console != fg_console &&
2119 vc_cons_allocated(want_console)) {
2120 hide_cursor(vc_cons[fg_console].d);
2121 change_console(vc_cons[want_console].d);
2122 /* we only changed when the console had already
2123 been allocated - a new console is not created
2124 in an interrupt routine */
2128 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2129 do_poke_blanked_console = 0;
2130 poke_blanked_console();
2132 if (scrollback_delta) {
2133 struct vc_data *vc = vc_cons[fg_console].d;
2135 if (vc->vc_mode == KD_TEXT)
2136 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2137 scrollback_delta = 0;
2139 if (blank_timer_expired) {
2141 blank_timer_expired = 0;
2144 release_console_sem();
2147 void set_console(int nr)
2150 schedule_console_callback();
2153 struct tty_driver *console_driver;
2155 #ifdef CONFIG_VT_CONSOLE
2158 * Console on virtual terminal
2160 * The console must be locked when we get here.
2163 static void vt_console_print(struct console *co, const char *b, unsigned count)
2165 struct vc_data *vc = vc_cons[fg_console].d;
2167 static unsigned long printing;
2168 const ushort *start;
2172 /* console busy or not yet initialized */
2173 if (!printable || test_and_set_bit(0, &printing))
2176 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2177 vc = vc_cons[kmsg_redirect - 1].d;
2179 /* read `x' only after setting currcons properly (otherwise
2180 the `x' macro will read the x of the foreground console). */
2183 if (!vc_cons_allocated(fg_console)) {
2185 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2189 if (vc->vc_mode != KD_TEXT)
2192 /* undraw cursor first */
2196 start = (ushort *)vc->vc_pos;
2198 /* Contrived structure to try to emulate original need_wrap behaviour
2199 * Problems caused when we have need_wrap set on '\n' character */
2202 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2204 if (CON_IS_VISIBLE(vc))
2205 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2207 if (vc->vc_need_wrap)
2211 if (c == 8) { /* backspace */
2213 start = (ushort *)vc->vc_pos;
2220 start = (ushort *)vc->vc_pos;
2222 if (c == 10 || c == 13)
2225 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2227 if (myx == vc->vc_cols - 1) {
2228 vc->vc_need_wrap = 1;
2235 if (CON_IS_VISIBLE(vc))
2236 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2238 if (vc->vc_x == vc->vc_cols) {
2240 vc->vc_need_wrap = 1;
2246 clear_bit(0, &printing);
2249 static struct tty_driver *vt_console_device(struct console *c, int *index)
2251 *index = c->index ? c->index-1 : fg_console;
2252 return console_driver;
2255 static struct console vt_console_driver = {
2257 .write = vt_console_print,
2258 .device = vt_console_device,
2259 .unblank = unblank_screen,
2260 .flags = CON_PRINTBUFFER,
2266 * Handling of Linux-specific VC ioctls
2270 * Generally a bit racy with respect to console_sem().
2272 * There are some functions which don't need it.
2274 * There are some functions which can sleep for arbitrary periods
2275 * (paste_selection) but we don't need the lock there anyway.
2277 * set_selection has locking, and definitely needs it
2280 int tioclinux(struct tty_struct *tty, unsigned long arg)
2283 char __user *p = (char __user *)arg;
2287 if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
2289 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2291 if (get_user(type, p))
2297 acquire_console_sem();
2298 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2299 release_console_sem();
2301 case TIOCL_PASTESEL:
2302 ret = paste_selection(tty);
2304 case TIOCL_UNBLANKSCREEN:
2305 acquire_console_sem();
2307 release_console_sem();
2309 case TIOCL_SELLOADLUT:
2310 ret = sel_loadlut(p);
2312 case TIOCL_GETSHIFTSTATE:
2315 * Make it possible to react to Shift+Mousebutton.
2316 * Note that 'shift_state' is an undocumented
2317 * kernel-internal variable; programs not closely
2318 * related to the kernel should not use this.
2321 ret = __put_user(data, p);
2323 case TIOCL_GETMOUSEREPORTING:
2324 data = mouse_reporting();
2325 ret = __put_user(data, p);
2327 case TIOCL_SETVESABLANK:
2328 set_vesa_blanking(p);
2330 case TIOCL_SETKMSGREDIRECT:
2331 if (!capable(CAP_SYS_ADMIN)) {
2334 if (get_user(data, p+1))
2337 kmsg_redirect = data;
2340 case TIOCL_GETFGCONSOLE:
2343 case TIOCL_SCROLLCONSOLE:
2344 if (get_user(lines, (s32 __user *)(p+4))) {
2347 scrollfront(vc_cons[fg_console].d, lines);
2351 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2352 acquire_console_sem();
2355 release_console_sem();
2357 case TIOCL_BLANKEDSCREEN:
2358 ret = console_blanked;
2368 * /dev/ttyN handling
2371 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2375 retval = do_con_write(tty, buf, count);
2376 con_flush_chars(tty);
2381 static void con_put_char(struct tty_struct *tty, unsigned char ch)
2384 return; /* n_r3964 calls put_char() from interrupt context */
2385 do_con_write(tty, &ch, 1);
2388 static int con_write_room(struct tty_struct *tty)
2392 return 4096; /* No limit, really; we're not buffering */
2395 static int con_chars_in_buffer(struct tty_struct *tty)
2397 return 0; /* we're not buffering */
2401 * con_throttle and con_unthrottle are only used for
2402 * paste_selection(), which has to stuff in a large number of
2405 static void con_throttle(struct tty_struct *tty)
2409 static void con_unthrottle(struct tty_struct *tty)
2411 struct vc_data *vc = tty->driver_data;
2413 wake_up_interruptible(&vc->paste_wait);
2417 * Turn the Scroll-Lock LED on when the tty is stopped
2419 static void con_stop(struct tty_struct *tty)
2424 console_num = tty->index;
2425 if (!vc_cons_allocated(console_num))
2427 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2432 * Turn the Scroll-Lock LED off when the console is started
2434 static void con_start(struct tty_struct *tty)
2439 console_num = tty->index;
2440 if (!vc_cons_allocated(console_num))
2442 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2446 static void con_flush_chars(struct tty_struct *tty)
2450 if (in_interrupt()) /* from flush_to_ldisc */
2453 /* if we race with con_close(), vt may be null */
2454 acquire_console_sem();
2455 vc = tty->driver_data;
2458 release_console_sem();
2462 * Allocate the console screen memory.
2464 static int con_open(struct tty_struct *tty, struct file *filp)
2466 unsigned int currcons = tty->index;
2469 acquire_console_sem();
2470 if (tty->driver_data == NULL) {
2471 ret = vc_allocate(currcons);
2473 struct vc_data *vc = vc_cons[currcons].d;
2474 tty->driver_data = vc;
2477 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2478 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2479 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2481 release_console_sem();
2482 vcs_make_devfs(tty);
2486 release_console_sem();
2491 * We take tty_sem in here to prevent another thread from coming in via init_dev
2492 * and taking a ref against the tty while we're in the process of forgetting
2493 * about it and cleaning things up.
2495 * This is because vcs_remove_devfs() can sleep and will drop the BKL.
2497 static void con_close(struct tty_struct *tty, struct file *filp)
2500 acquire_console_sem();
2501 if (tty && tty->count == 1) {
2502 struct vc_data *vc = tty->driver_data;
2506 tty->driver_data = NULL;
2507 release_console_sem();
2508 vcs_remove_devfs(tty);
2511 * tty_sem is released, but we still hold BKL, so there is
2512 * still exclusion against init_dev()
2516 release_console_sem();
2520 static void vc_init(struct vc_data *vc, unsigned int rows,
2521 unsigned int cols, int do_clear)
2527 vc->vc_size_row = cols << 1;
2528 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2531 vc->vc_pos = vc->vc_origin;
2533 for (j=k=0; j<16; j++) {
2534 vc->vc_palette[k++] = default_red[j] ;
2535 vc->vc_palette[k++] = default_grn[j] ;
2536 vc->vc_palette[k++] = default_blu[j] ;
2538 vc->vc_def_color = 0x07; /* white */
2539 vc->vc_ulcolor = 0x0f; /* bold white */
2540 vc->vc_halfcolor = 0x08; /* grey */
2541 init_waitqueue_head(&vc->paste_wait);
2542 reset_terminal(vc, do_clear);
2546 * This routine initializes console interrupts, and does nothing
2547 * else. If you want the screen to clear, call tty_write with
2548 * the appropriate escape-sequence.
2551 static int __init con_init(void)
2553 const char *display_desc = NULL;
2555 unsigned int currcons = 0;
2557 acquire_console_sem();
2560 display_desc = conswitchp->con_startup();
2561 if (!display_desc) {
2563 release_console_sem();
2567 init_timer(&console_timer);
2568 console_timer.function = blank_screen_t;
2569 if (blankinterval) {
2570 blank_state = blank_normal_wait;
2571 mod_timer(&console_timer, jiffies + blankinterval);
2575 * kmalloc is not running yet - we use the bootmem allocator.
2577 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2578 vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
2579 visual_init(vc, currcons, 1);
2580 vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
2581 vc->vc_kmalloced = 0;
2582 vc_init(vc, vc->vc_rows, vc->vc_cols,
2583 currcons || !vc->vc_sw->con_save_screen);
2585 currcons = fg_console = 0;
2586 master_display_fg = vc = vc_cons[currcons].d;
2589 gotoxy(vc, vc->vc_x, vc->vc_y);
2592 printk("Console: %s %s %dx%d",
2593 vc->vc_can_do_color ? "colour" : "mono",
2594 display_desc, vc->vc_cols, vc->vc_rows);
2598 release_console_sem();
2600 #ifdef CONFIG_VT_CONSOLE
2601 register_console(&vt_console_driver);
2605 console_initcall(con_init);
2607 static struct tty_operations con_ops = {
2611 .write_room = con_write_room,
2612 .put_char = con_put_char,
2613 .flush_chars = con_flush_chars,
2614 .chars_in_buffer = con_chars_in_buffer,
2618 .throttle = con_throttle,
2619 .unthrottle = con_unthrottle,
2622 int __init vty_init(void)
2626 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2627 if (!console_driver)
2628 panic("Couldn't allocate console driver\n");
2629 console_driver->owner = THIS_MODULE;
2630 console_driver->devfs_name = "vc/";
2631 console_driver->name = "tty";
2632 console_driver->name_base = 1;
2633 console_driver->major = TTY_MAJOR;
2634 console_driver->minor_start = 1;
2635 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2636 console_driver->init_termios = tty_std_termios;
2637 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2638 tty_set_operations(console_driver, &con_ops);
2639 if (tty_register_driver(console_driver))
2640 panic("Couldn't register console driver\n");
2644 #ifdef CONFIG_PROM_CONSOLE
2647 #ifdef CONFIG_MDA_CONSOLE
2653 #ifndef VT_SINGLE_DRIVER
2656 * If we support more console drivers, this function is used
2657 * when a driver wants to take over some existing consoles
2658 * and become default driver for newly opened ones.
2661 int take_over_console(const struct consw *csw, int first, int last, int deflt)
2665 struct module *owner;
2668 if (!try_module_get(owner))
2671 acquire_console_sem();
2673 desc = csw->con_startup();
2675 release_console_sem();
2681 module_put(conswitchp->owner);
2682 __module_get(owner);
2686 for (i = first; i <= last; i++) {
2688 struct vc_data *vc = vc_cons[i].d;
2690 if (con_driver_map[i])
2691 module_put(con_driver_map[i]->owner);
2692 __module_get(owner);
2693 con_driver_map[i] = csw;
2695 if (!vc || !vc->vc_sw)
2699 if (CON_IS_VISIBLE(vc))
2701 old_was_color = vc->vc_can_do_color;
2702 vc->vc_sw->con_deinit(vc);
2703 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
2704 vc->vc_visible_origin = vc->vc_origin;
2705 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
2706 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
2707 visual_init(vc, i, 0);
2710 /* If the console changed between mono <-> color, then
2711 * the attributes in the screenbuf will be wrong. The
2712 * following resets all attributes to something sane.
2714 if (old_was_color != vc->vc_can_do_color)
2715 clear_buffer_attributes(vc);
2717 if (CON_IS_VISIBLE(vc))
2720 printk("Console: switching ");
2722 printk("consoles %d-%d ", first+1, last+1);
2724 printk("to %s %s %dx%d\n",
2725 vc_cons[j].d->vc_can_do_color ? "colour" : "mono",
2726 desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows);
2728 printk("to %s\n", desc);
2730 release_console_sem();
2736 void give_up_console(const struct consw *csw)
2740 for(i = 0; i < MAX_NR_CONSOLES; i++)
2741 if (con_driver_map[i] == csw) {
2742 module_put(csw->owner);
2743 con_driver_map[i] = NULL;
2753 static void set_vesa_blanking(char __user *p)
2756 get_user(mode, p + 1);
2757 vesa_blank_mode = (mode < 4) ? mode : 0;
2761 * This is called by a timer handler
2763 static void vesa_powerdown(void)
2765 struct vc_data *c = vc_cons[fg_console].d;
2767 * Power down if currently suspended (1 or 2),
2768 * suspend if currently blanked (0),
2769 * else do nothing (i.e. already powered down (3)).
2770 * Called only if powerdown features are allowed.
2772 switch (vesa_blank_mode) {
2773 case VESA_NO_BLANKING:
2774 c->vc_sw->con_blank(c, VESA_VSYNC_SUSPEND+1, 0);
2776 case VESA_VSYNC_SUSPEND:
2777 case VESA_HSYNC_SUSPEND:
2778 c->vc_sw->con_blank(c, VESA_POWERDOWN+1, 0);
2783 void do_blank_screen(int entering_gfx)
2785 struct vc_data *vc = vc_cons[fg_console].d;
2788 WARN_CONSOLE_UNLOCKED();
2790 if (console_blanked) {
2791 if (blank_state == blank_vesa_wait) {
2792 blank_state = blank_off;
2798 if (blank_state != blank_normal_wait)
2800 blank_state = blank_off;
2802 /* entering graphics mode? */
2806 vc->vc_sw->con_blank(vc, -1, 1);
2807 console_blanked = fg_console + 1;
2812 /* don't blank graphics */
2813 if (vc->vc_mode != KD_TEXT) {
2814 console_blanked = fg_console + 1;
2819 del_timer_sync(&console_timer);
2820 blank_timer_expired = 0;
2823 /* In case we need to reset origin, blanking hook returns 1 */
2824 i = vc->vc_sw->con_blank(vc, 1, 0);
2825 console_blanked = fg_console + 1;
2829 if (console_blank_hook && console_blank_hook(1))
2832 if (vesa_off_interval) {
2833 blank_state = blank_vesa_wait;
2834 mod_timer(&console_timer, jiffies + vesa_off_interval);
2837 if (vesa_blank_mode)
2838 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
2840 EXPORT_SYMBOL(do_blank_screen);
2843 * Called by timer as well as from vt_console_driver
2845 void do_unblank_screen(int leaving_gfx)
2849 /* This should now always be called from a "sane" (read: can schedule)
2850 * context for the sake of the low level drivers, except in the special
2851 * case of oops_in_progress
2853 if (!oops_in_progress)
2856 WARN_CONSOLE_UNLOCKED();
2859 if (!console_blanked)
2861 if (!vc_cons_allocated(fg_console)) {
2863 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
2866 vc = vc_cons[fg_console].d;
2867 if (vc->vc_mode != KD_TEXT)
2868 return; /* but leave console_blanked != 0 */
2870 if (blankinterval) {
2871 mod_timer(&console_timer, jiffies + blankinterval);
2872 blank_state = blank_normal_wait;
2875 console_blanked = 0;
2876 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
2877 /* Low-level driver cannot restore -> do it ourselves */
2879 if (console_blank_hook)
2880 console_blank_hook(0);
2884 EXPORT_SYMBOL(do_unblank_screen);
2887 * This is called by the outside world to cause a forced unblank, mostly for
2888 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
2889 * call it with 1 as an argument and so force a mode restore... that may kill
2890 * X or at least garbage the screen but would also make the Oops visible...
2892 void unblank_screen(void)
2894 do_unblank_screen(0);
2898 * We defer the timer blanking to work queue so it can take the console semaphore
2899 * (console operations can still happen at irq time, but only from printk which
2900 * has the console semaphore. Not perfect yet, but better than no locking
2902 static void blank_screen_t(unsigned long dummy)
2904 if (unlikely(!keventd_up())) {
2905 mod_timer(&console_timer, jiffies + blankinterval);
2908 blank_timer_expired = 1;
2909 schedule_work(&console_work);
2912 void poke_blanked_console(void)
2914 WARN_CONSOLE_UNLOCKED();
2916 /* Add this so we quickly catch whoever might call us in a non
2917 * safe context. Nowadays, unblank_screen() isn't to be called in
2918 * atomic contexts and is allowed to schedule (with the special case
2919 * of oops_in_progress, but that isn't of any concern for this
2924 /* This isn't perfectly race free, but a race here would be mostly harmless,
2925 * at worse, we'll do a spurrious blank and it's unlikely
2927 del_timer(&console_timer);
2928 blank_timer_expired = 0;
2930 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
2932 if (console_blanked)
2934 else if (blankinterval) {
2935 mod_timer(&console_timer, jiffies + blankinterval);
2936 blank_state = blank_normal_wait;
2944 static void set_palette(struct vc_data *vc)
2946 WARN_CONSOLE_UNLOCKED();
2948 if (vc->vc_mode != KD_GRAPHICS)
2949 vc->vc_sw->con_set_palette(vc, color_table);
2952 static int set_get_cmap(unsigned char __user *arg, int set)
2956 WARN_CONSOLE_UNLOCKED();
2958 for (i = 0; i < 16; i++)
2960 get_user(default_red[i], arg++);
2961 get_user(default_grn[i], arg++);
2962 get_user(default_blu[i], arg++);
2964 put_user(default_red[i], arg++);
2965 put_user(default_grn[i], arg++);
2966 put_user(default_blu[i], arg++);
2969 for (i = 0; i < MAX_NR_CONSOLES; i++)
2970 if (vc_cons_allocated(i)) {
2971 for (j = k = 0; j < 16; j++) {
2972 vc_cons[i].d->vc_palette[k++] = default_red[j];
2973 vc_cons[i].d->vc_palette[k++] = default_grn[j];
2974 vc_cons[i].d->vc_palette[k++] = default_blu[j];
2976 set_palette(vc_cons[i].d);
2983 * Load palette into the DAC registers. arg points to a colour
2984 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
2987 int con_set_cmap(unsigned char __user *arg)
2991 acquire_console_sem();
2992 rc = set_get_cmap (arg,1);
2993 release_console_sem();
2998 int con_get_cmap(unsigned char __user *arg)
3002 acquire_console_sem();
3003 rc = set_get_cmap (arg,0);
3004 release_console_sem();
3009 void reset_palette(struct vc_data *vc)
3012 for (j=k=0; j<16; j++) {
3013 vc->vc_palette[k++] = default_red[j];
3014 vc->vc_palette[k++] = default_grn[j];
3015 vc->vc_palette[k++] = default_blu[j];
3023 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3024 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3025 * depending on width) reserved for each character which is kinda wasty, but
3026 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3027 * is upto the actual low-level console-driver convert data into its favorite
3028 * format (maybe we should add a `fontoffset' field to the `display'
3029 * structure so we won't have to convert the fontdata all the time.
3033 #define max_font_size 65536
3035 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3037 struct console_font font;
3041 if (vc->vc_mode != KD_TEXT)
3045 font.data = kmalloc(max_font_size, GFP_KERNEL);
3051 acquire_console_sem();
3052 if (vc->vc_sw->con_font_get)
3053 rc = vc->vc_sw->con_font_get(vc, &font);
3056 release_console_sem();
3061 c = (font.width+7)/8 * 32 * font.charcount;
3063 if (op->data && font.charcount > op->charcount)
3065 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3066 if (font.width > op->width || font.height > op->height)
3069 if (font.width != 8)
3071 else if ((op->height && font.height > op->height) ||
3078 op->height = font.height;
3079 op->width = font.width;
3080 op->charcount = font.charcount;
3082 if (op->data && copy_to_user(op->data, font.data, c))
3090 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3092 struct console_font font;
3096 if (vc->vc_mode != KD_TEXT)
3100 if (op->charcount > 512)
3102 if (!op->height) { /* Need to guess font height [compat] */
3104 u8 __user *charmap = op->data;
3107 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3108 so that we can get rid of this soon */
3109 if (!(op->flags & KD_FONT_FLAG_OLD))
3111 for (h = 32; h > 0; h--)
3112 for (i = 0; i < op->charcount; i++) {
3113 if (get_user(tmp, &charmap[32*i+h-1]))
3122 if (op->width <= 0 || op->width > 32 || op->height > 32)
3124 size = (op->width+7)/8 * 32 * op->charcount;
3125 if (size > max_font_size)
3127 font.charcount = op->charcount;
3128 font.height = op->height;
3129 font.width = op->width;
3130 font.data = kmalloc(size, GFP_KERNEL);
3133 if (copy_from_user(font.data, op->data, size)) {
3137 acquire_console_sem();
3138 if (vc->vc_sw->con_font_set)
3139 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3142 release_console_sem();
3147 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3149 struct console_font font = {.width = op->width, .height = op->height};
3150 char name[MAX_FONT_NAME];
3154 if (vc->vc_mode != KD_TEXT)
3159 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3162 name[MAX_FONT_NAME - 1] = 0;
3164 acquire_console_sem();
3165 if (vc->vc_sw->con_font_default)
3166 rc = vc->vc_sw->con_font_default(vc, &font, s);
3169 release_console_sem();
3171 op->width = font.width;
3172 op->height = font.height;
3177 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3179 int con = op->height;
3182 if (vc->vc_mode != KD_TEXT)
3185 acquire_console_sem();
3186 if (!vc->vc_sw->con_font_copy)
3188 else if (con < 0 || !vc_cons_allocated(con))
3190 else if (con == vc->vc_num) /* nothing to do */
3193 rc = vc->vc_sw->con_font_copy(vc, con);
3194 release_console_sem();
3198 int con_font_op(struct vc_data *vc, struct console_font_op *op)
3201 case KD_FONT_OP_SET:
3202 return con_font_set(vc, op);
3203 case KD_FONT_OP_GET:
3204 return con_font_get(vc, op);
3205 case KD_FONT_OP_SET_DEFAULT:
3206 return con_font_default(vc, op);
3207 case KD_FONT_OP_COPY:
3208 return con_font_copy(vc, op);
3214 * Interface exported to selection and vcs.
3217 /* used by selection */
3218 u16 screen_glyph(struct vc_data *vc, int offset)
3220 u16 w = scr_readw(screenpos(vc, offset, 1));
3223 if (w & vc->vc_hi_font_mask)
3228 /* used by vcs - note the word offset */
3229 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
3231 return screenpos(vc, 2 * w_offset, viewed);
3234 void getconsxy(struct vc_data *vc, unsigned char *p)
3240 void putconsxy(struct vc_data *vc, unsigned char *p)
3242 gotoxy(vc, p[0], p[1]);
3246 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
3248 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
3249 return softcursor_original;
3250 return scr_readw(org);
3253 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
3255 scr_writew(val, org);
3256 if ((unsigned long)org == vc->vc_pos) {
3257 softcursor_original = -1;
3263 * Visible symbols for modules
3266 EXPORT_SYMBOL(color_table);
3267 EXPORT_SYMBOL(default_red);
3268 EXPORT_SYMBOL(default_grn);
3269 EXPORT_SYMBOL(default_blu);
3270 EXPORT_SYMBOL(update_region);
3271 EXPORT_SYMBOL(redraw_screen);
3272 EXPORT_SYMBOL(vc_resize);
3273 EXPORT_SYMBOL(fg_console);
3274 EXPORT_SYMBOL(console_blank_hook);
3275 EXPORT_SYMBOL(console_blanked);
3276 EXPORT_SYMBOL(vc_cons);
3277 #ifndef VT_SINGLE_DRIVER
3278 EXPORT_SYMBOL(take_over_console);
3279 EXPORT_SYMBOL(give_up_console);