diff options
Diffstat (limited to 'drivers/char/vt.c')
| -rw-r--r-- | drivers/char/vt.c | 4209 |
1 files changed, 0 insertions, 4209 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c deleted file mode 100644 index a8ec48ed14d9..000000000000 --- a/drivers/char/vt.c +++ /dev/null @@ -1,4209 +0,0 @@ -/* - * linux/drivers/char/vt.c - * - * Copyright (C) 1991, 1992 Linus Torvalds - */ - -/* - * Hopefully this will be a rather complete VT102 implementation. - * - * Beeping thanks to John T Kohl. - * - * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics - * Chars, and VT100 enhancements by Peter MacDonald. - * - * Copy and paste function by Andrew Haylett, - * some enhancements by Alessandro Rubini. - * - * Code to check for different video-cards mostly by Galen Hunt, - * <g-hunt@ee.utah.edu> - * - * Rudimentary ISO 10646/Unicode/UTF-8 character set support by - * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. - * - * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 - * Resizing of consoles, aeb, 940926 - * - * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 - * <poe@daimi.aau.dk> - * - * User-defined bell sound, new setterm control sequences and printk - * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 - * - * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> - * - * Merge with the abstract console driver by Geert Uytterhoeven - * <geert@linux-m68k.org>, Jan 1997. - * - * Original m68k console driver modifications by - * - * - Arno Griffioen <arno@usn.nl> - * - David Carter <carter@cs.bris.ac.uk> - * - * The abstract console driver provides a generic interface for a text - * console. It supports VGA text mode, frame buffer based graphical consoles - * and special graphics processors that are only accessible through some - * registers (e.g. a TMS340x0 GSP). - * - * The interface to the hardware is specified using a special structure - * (struct consw) which contains function pointers to console operations - * (see <linux/console.h> for more information). - * - * Support for changeable cursor shape - * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 - * - * Ported to i386 and con_scrolldelta fixed - * by Emmanuel Marty <core@ggi-project.org>, April 1998 - * - * Resurrected character buffers in videoram plus lots of other trickery - * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 - * - * Removed old-style timers, introduced console_timer, made timer - * deletion SMP-safe. 17Jun00, Andrew Morton - * - * Removed console_lock, enabled interrupts across all console operations - * 13 March 2001, Andrew Morton - * - * Fixed UTF-8 mode so alternate charset modes always work according - * to control sequences interpreted in do_con_trol function - * preserving backward VT100 semigraphics compatibility, - * malformed UTF sequences represented as sequences of replacement glyphs, - * original codes or '?' as a last resort if replacement glyph is undefined - * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/sched.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/kd.h> -#include <linux/slab.h> -#include <linux/major.h> -#include <linux/mm.h> -#include <linux/console.h> -#include <linux/init.h> -#include <linux/mutex.h> -#include <linux/vt_kern.h> -#include <linux/selection.h> -#include <linux/smp_lock.h> -#include <linux/tiocl.h> -#include <linux/kbd_kern.h> -#include <linux/consolemap.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/workqueue.h> -#include <linux/pm.h> -#include <linux/font.h> -#include <linux/bitops.h> -#include <linux/notifier.h> -#include <linux/device.h> -#include <linux/io.h> -#include <asm/system.h> -#include <linux/uaccess.h> -#include <linux/kdb.h> -#include <linux/ctype.h> - -#define MAX_NR_CON_DRIVER 16 - -#define CON_DRIVER_FLAG_MODULE 1 -#define CON_DRIVER_FLAG_INIT 2 -#define CON_DRIVER_FLAG_ATTR 4 - -struct con_driver { - const struct consw *con; - const char *desc; - struct device *dev; - int node; - int first; - int last; - int flag; -}; - -static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; -const struct consw *conswitchp; - -/* A bitmap for codes <32. A bit of 1 indicates that the code - * corresponding to that bit number invokes some special action - * (such as cursor movement) and should not be displayed as a - * glyph unless the disp_ctrl mode is explicitly enabled. - */ -#define CTRL_ACTION 0x0d00ff81 -#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ - -/* - * Here is the default bell parameters: 750HZ, 1/8th of a second - */ -#define DEFAULT_BELL_PITCH 750 -#define DEFAULT_BELL_DURATION (HZ/8) - -struct vc vc_cons [MAX_NR_CONSOLES]; - -#ifndef VT_SINGLE_DRIVER -static const struct consw *con_driver_map[MAX_NR_CONSOLES]; -#endif - -static int con_open(struct tty_struct *, struct file *); -static void vc_init(struct vc_data *vc, unsigned int rows, - unsigned int cols, int do_clear); -static void gotoxy(struct vc_data *vc, int new_x, int new_y); -static void save_cur(struct vc_data *vc); -static void reset_terminal(struct vc_data *vc, int do_clear); -static void con_flush_chars(struct tty_struct *tty); -static int set_vesa_blanking(char __user *p); -static void set_cursor(struct vc_data *vc); -static void hide_cursor(struct vc_data *vc); -static void console_callback(struct work_struct *ignored); -static void blank_screen_t(unsigned long dummy); -static void set_palette(struct vc_data *vc); - -static int printable; /* Is console ready for printing? */ -int default_utf8 = true; -module_param(default_utf8, int, S_IRUGO | S_IWUSR); -int global_cursor_default = -1; -module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); - -static int cur_default = CUR_DEFAULT; -module_param(cur_default, int, S_IRUGO | S_IWUSR); - -/* - * ignore_poke: don't unblank the screen when things are typed. This is - * mainly for the privacy of braille terminal users. - */ -static int ignore_poke; - -int do_poke_blanked_console; -int console_blanked; - -static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ -static int vesa_off_interval; -static int blankinterval = 10*60; -core_param(consoleblank, blankinterval, int, 0444); - -static DECLARE_WORK(console_work, console_callback); - -/* - * fg_console is the current virtual console, - * last_console is the last used one, - * want_console is the console we want to switch to, - * saved_* variants are for save/restore around kernel debugger enter/leave - */ -int fg_console; -int last_console; -int want_console = -1; -static int saved_fg_console; -static int saved_last_console; -static int saved_want_console; -static int saved_vc_mode; -static int saved_console_blanked; - -/* - * For each existing display, we have a pointer to console currently visible - * on that display, allowing consoles other than fg_console to be refreshed - * appropriately. Unless the low-level driver supplies its own display_fg - * variable, we use this one for the "master display". - */ -static struct vc_data *master_display_fg; - -/* - * Unfortunately, we need to delay tty echo when we're currently writing to the - * console since the code is (and always was) not re-entrant, so we schedule - * all flip requests to process context with schedule-task() and run it from - * console_callback(). - */ - -/* - * For the same reason, we defer scrollback to the console callback. - */ -static int scrollback_delta; - -/* - * Hook so that the power management routines can (un)blank - * the console on our behalf. - */ -int (*console_blank_hook)(int); - -static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); -static int blank_state; -static int blank_timer_expired; -enum { - blank_off = 0, - blank_normal_wait, - blank_vesa_wait, -}; - -/* - * Notifier list for console events. - */ -static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); - -int register_vt_notifier(struct notifier_block *nb) -{ - return atomic_notifier_chain_register(&vt_notifier_list, nb); -} -EXPORT_SYMBOL_GPL(register_vt_notifier); - -int unregister_vt_notifier(struct notifier_block *nb) -{ - return atomic_notifier_chain_unregister(&vt_notifier_list, nb); -} -EXPORT_SYMBOL_GPL(unregister_vt_notifier); - -static void notify_write(struct vc_data *vc, unsigned int unicode) -{ - struct vt_notifier_param param = { .vc = vc, unicode = unicode }; - atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); -} - -static void notify_update(struct vc_data *vc) -{ - struct vt_notifier_param param = { .vc = vc }; - atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); -} -/* - * Low-Level Functions - */ - -#define IS_FG(vc) ((vc)->vc_num == fg_console) - -#ifdef VT_BUF_VRAM_ONLY -#define DO_UPDATE(vc) 0 -#else -#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) -#endif - -static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) -{ - unsigned short *p; - - if (!viewed) - p = (unsigned short *)(vc->vc_origin + offset); - else if (!vc->vc_sw->con_screen_pos) - p = (unsigned short *)(vc->vc_visible_origin + offset); - else - p = vc->vc_sw->con_screen_pos(vc, offset); - return p; -} - -/* Called from the keyboard irq path.. */ -static inline void scrolldelta(int lines) -{ - /* FIXME */ - /* scrolldelta needs some kind of consistency lock, but the BKL was - and still is not protecting versus the scheduled back end */ - scrollback_delta += lines; - schedule_console_callback(); -} - -void schedule_console_callback(void) -{ - schedule_work(&console_work); -} - -static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) -{ - unsigned short *d, *s; - - if (t+nr >= b) - nr = b - t - 1; - if (b > vc->vc_rows || t >= b || nr < 1) - return; - if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) - return; - d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); - s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); - scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); - scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, - vc->vc_size_row * nr); -} - -static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) -{ - unsigned short *s; - unsigned int step; - - if (t+nr >= b) - nr = b - t - 1; - if (b > vc->vc_rows || t >= b || nr < 1) - return; - if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) - return; - s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); - step = vc->vc_cols * nr; - scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); - scr_memsetw(s, vc->vc_video_erase_char, 2 * step); -} - -static void do_update_region(struct vc_data *vc, unsigned long start, int count) -{ -#ifndef VT_BUF_VRAM_ONLY - unsigned int xx, yy, offset; - u16 *p; - - p = (u16 *) start; - if (!vc->vc_sw->con_getxy) { - offset = (start - vc->vc_origin) / 2; - xx = offset % vc->vc_cols; - yy = offset / vc->vc_cols; - } else { - int nxx, nyy; - start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); - xx = nxx; yy = nyy; - } - for(;;) { - u16 attrib = scr_readw(p) & 0xff00; - int startx = xx; - u16 *q = p; - while (xx < vc->vc_cols && count) { - if (attrib != (scr_readw(p) & 0xff00)) { - if (p > q) - vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); - startx = xx; - q = p; - attrib = scr_readw(p) & 0xff00; - } - p++; - xx++; - count--; - } - if (p > q) - vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); - if (!count) - break; - xx = 0; - yy++; - if (vc->vc_sw->con_getxy) { - p = (u16 *)start; - start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); - } - } -#endif -} - -void update_region(struct vc_data *vc, unsigned long start, int count) -{ - WARN_CONSOLE_UNLOCKED(); - - if (DO_UPDATE(vc)) { - hide_cursor(vc); - do_update_region(vc, start, count); - set_cursor(vc); - } -} - -/* Structure of attributes is hardware-dependent */ - -static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, - u8 _underline, u8 _reverse, u8 _italic) -{ - if (vc->vc_sw->con_build_attr) - return vc->vc_sw->con_build_attr(vc, _color, _intensity, - _blink, _underline, _reverse, _italic); - -#ifndef VT_BUF_VRAM_ONLY -/* - * ++roman: I completely changed the attribute format for monochrome - * mode (!can_do_color). The formerly used MDA (monochrome display - * adapter) format didn't allow the combination of certain effects. - * Now the attribute is just a bit vector: - * Bit 0..1: intensity (0..2) - * Bit 2 : underline - * Bit 3 : reverse - * Bit 7 : blink - */ - { - u8 a = _color; - if (!vc->vc_can_do_color) - return _intensity | - (_italic ? 2 : 0) | - (_underline ? 4 : 0) | - (_reverse ? 8 : 0) | - (_blink ? 0x80 : 0); - if (_italic) - a = (a & 0xF0) | vc->vc_itcolor; - else if (_underline) - a = (a & 0xf0) | vc->vc_ulcolor; - else if (_intensity == 0) - a = (a & 0xf0) | vc->vc_ulcolor; - if (_reverse) - a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); - if (_blink) - a ^= 0x80; - if (_intensity == 2) - a ^= 0x08; - if (vc->vc_hi_font_mask == 0x100) - a <<= 1; - return a; - } -#else - return 0; -#endif -} - -static void update_attr(struct vc_data *vc) -{ - vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, - vc->vc_blink, vc->vc_underline, - vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); - vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; -} - -/* Note: inverting the screen twice should revert to the original state */ -void invert_screen(struct vc_data *vc, int offset, int count, int viewed) -{ - unsigned short *p; - - WARN_CONSOLE_UNLOCKED(); - - count /= 2; - p = screenpos(vc, offset, viewed); - if (vc->vc_sw->con_invert_region) - vc->vc_sw->con_invert_region(vc, p, count); -#ifndef VT_BUF_VRAM_ONLY - else { - u16 *q = p; - int cnt = count; - u16 a; - - if (!vc->vc_can_do_color) { - while (cnt--) { - a = scr_readw(q); - a ^= 0x0800; - scr_writew(a, q); - q++; - } - } else if (vc->vc_hi_font_mask == 0x100) { - while (cnt--) { - a = scr_readw(q); - a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); - scr_writew(a, q); - q++; - } - } else { - while (cnt--) { - a = scr_readw(q); - a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); - scr_writew(a, q); - q++; - } - } - } -#endif - if (DO_UPDATE(vc)) - do_update_region(vc, (unsigned long) p, count); -} - -/* used by selection: complement pointer position */ -void complement_pos(struct vc_data *vc, int offset) -{ - static int old_offset = -1; - static unsigned short old; - static unsigned short oldx, oldy; - - WARN_CONSOLE_UNLOCKED(); - - if (old_offset != -1 && old_offset >= 0 && - old_offset < vc->vc_screenbuf_size) { - scr_writew(old, screenpos(vc, old_offset, 1)); - if (DO_UPDATE(vc)) - vc->vc_sw->con_putc(vc, old, oldy, oldx); - } - - old_offset = offset; - - if (offset != -1 && offset >= 0 && - offset < vc->vc_screenbuf_size) { - unsigned short new; - unsigned short *p; - p = screenpos(vc, offset, 1); - old = scr_readw(p); - new = old ^ vc->vc_complement_mask; - scr_writew(new, p); - if (DO_UPDATE(vc)) { - oldx = (offset >> 1) % vc->vc_cols; - oldy = (offset >> 1) / vc->vc_cols; - vc->vc_sw->con_putc(vc, new, oldy, oldx); - } - } - -} - -static void insert_char(struct vc_data *vc, unsigned int nr) -{ - unsigned short *p, *q = (unsigned short *)vc->vc_pos; - - p = q + vc->vc_cols - nr - vc->vc_x; - while (--p >= q) - scr_writew(scr_readw(p), p + nr); - scr_memsetw(q, vc->vc_video_erase_char, nr * 2); - vc->vc_need_wrap = 0; - if (DO_UPDATE(vc)) { - unsigned short oldattr = vc->vc_attr; - vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, - vc->vc_cols - vc->vc_x - nr); - vc->vc_attr = vc->vc_video_erase_char >> 8; - while (nr--) - vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); - vc->vc_attr = oldattr; - } -} - -static void delete_char(struct vc_data *vc, unsigned int nr) -{ - unsigned int i = vc->vc_x; - unsigned short *p = (unsigned short *)vc->vc_pos; - - while (++i <= vc->vc_cols - nr) { - scr_writew(scr_readw(p+nr), p); - p++; - } - scr_memsetw(p, vc->vc_video_erase_char, nr * 2); - vc->vc_need_wrap = 0; - if (DO_UPDATE(vc)) { - unsigned short oldattr = vc->vc_attr; - vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, - vc->vc_cols - vc->vc_x - nr); - vc->vc_attr = vc->vc_video_erase_char >> 8; - while (nr--) - vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, - vc->vc_cols - 1 - nr); - vc->vc_attr = oldattr; - } -} - -static int softcursor_original; - -static void add_softcursor(struct vc_data *vc) -{ - int i = scr_readw((u16 *) vc->vc_pos); - u32 type = vc->vc_cursor_type; - - if (! (type & 0x10)) return; - if (softcursor_original != -1) return; - softcursor_original = i; - i |= ((type >> 8) & 0xff00 ); - i ^= ((type) & 0xff00 ); - if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; - if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; - scr_writew(i, (u16 *) vc->vc_pos); - if (DO_UPDATE(vc)) - vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); -} - -static void hide_softcursor(struct vc_data *vc) -{ - if (softcursor_original != -1) { - scr_writew(softcursor_original, (u16 *)vc->vc_pos); - if (DO_UPDATE(vc)) - vc->vc_sw->con_putc(vc, softcursor_original, - vc->vc_y, vc->vc_x); - softcursor_original = -1; - } -} - -static void hide_cursor(struct vc_data *vc) -{ - if (vc == sel_cons) - clear_selection(); - vc->vc_sw->con_cursor(vc, CM_ERASE); - hide_softcursor(vc); -} - -static void set_cursor(struct vc_data *vc) -{ - if (!IS_FG(vc) || console_blanked || - vc->vc_mode == KD_GRAPHICS) - return; - if (vc->vc_deccm) { - if (vc == sel_cons) - clear_selection(); - add_softcursor(vc); - if ((vc->vc_cursor_type & 0x0f) != 1) - vc->vc_sw->con_cursor(vc, CM_DRAW); - } else - hide_cursor(vc); -} - -static void set_origin(struct vc_data *vc) -{ - WARN_CONSOLE_UNLOCKED(); - - if (!CON_IS_VISIBLE(vc) || - !vc->vc_sw->con_set_origin || - !vc->vc_sw->con_set_origin(vc)) - vc->vc_origin = (unsigned long)vc->vc_screenbuf; - vc->vc_visible_origin = vc->vc_origin; - vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; - vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; -} - -static inline void save_screen(struct vc_data *vc) -{ - WARN_CONSOLE_UNLOCKED(); - - if (vc->vc_sw->con_save_screen) - vc->vc_sw->con_save_screen(vc); -} - -/* - * Redrawing of screen - */ - -static void clear_buffer_attributes(struct vc_data *vc) -{ - unsigned short *p = (unsigned short *)vc->vc_origin; - int count = vc->vc_screenbuf_size / 2; - int mask = vc->vc_hi_font_mask | 0xff; - - for (; count > 0; count--, p++) { - scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); - } -} - -void redraw_screen(struct vc_data *vc, int is_switch) -{ - int redraw = 0; - - WARN_CONSOLE_UNLOCKED(); - - if (!vc) { - /* strange ... */ - /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ - return; - } - - if (is_switch) { - struct vc_data *old_vc = vc_cons[fg_console].d; - if (old_vc == vc) - return; - if (!CON_IS_VISIBLE(vc)) - redraw = 1; - *vc->vc_display_fg = vc; - fg_console = vc->vc_num; - hide_cursor(old_vc); - if (!CON_IS_VISIBLE(old_vc)) { - save_screen(old_vc); - set_origin(old_vc); - } - } else { - hide_cursor(vc); - redraw = 1; - } - - if (redraw) { - int update; - int old_was_color = vc->vc_can_do_color; - - set_origin(vc); - update = vc->vc_sw->con_switch(vc); - set_palette(vc); - /* - * If console changed from mono<->color, the best we can do - * is to clear the buffer attributes. As it currently stands, - * rebuilding new attributes from the old buffer is not doable - * without overly complex code. - */ - if (old_was_color != vc->vc_can_do_color) { - update_attr(vc); - clear_buffer_attributes(vc); - } - - /* Forcibly update if we're panicing */ - if ((update && vc->vc_mode != KD_GRAPHICS) || - vt_force_oops_output(vc)) - do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); - } - set_cursor(vc); - if (is_switch) { - set_leds(); - compute_shiftstate(); - notify_update(vc); - } -} - -/* - * Allocation, freeing and resizing of VTs. - */ - -int vc_cons_allocated(unsigned int i) -{ - return (i < MAX_NR_CONSOLES && vc_cons[i].d); -} - -static void visual_init(struct vc_data *vc, int num, int init) -{ - /* ++Geert: vc->vc_sw->con_init determines console size */ - if (vc->vc_sw) - module_put(vc->vc_sw->owner); - vc->vc_sw = conswitchp; -#ifndef VT_SINGLE_DRIVER - if (con_driver_map[num]) - vc->vc_sw = con_driver_map[num]; -#endif - __module_get(vc->vc_sw->owner); - vc->vc_num = num; - vc->vc_display_fg = &master_display_fg; - vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; - vc->vc_uni_pagedir = 0; - vc->vc_hi_font_mask = 0; - vc->vc_complement_mask = 0; - vc->vc_can_do_color = 0; - vc->vc_panic_force_write = false; - vc->vc_sw->con_init(vc, init); - if (!vc->vc_complement_mask) - vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; - vc->vc_s_complement_mask = vc->vc_complement_mask; - vc->vc_size_row = vc->vc_cols << 1; - vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; -} - -int vc_allocate(unsigned int currcons) /* return 0 on success */ -{ - WARN_CONSOLE_UNLOCKED(); - - if (currcons >= MAX_NR_CONSOLES) - return -ENXIO; - if (!vc_cons[currcons].d) { - struct vc_data *vc; - struct vt_notifier_param param; - - /* prevent users from taking too much memory */ - if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) - return -EPERM; - - /* due to the granularity of kmalloc, we waste some memory here */ - /* the alloc is done in two steps, to optimize the common situation - of a 25x80 console (structsize=216, screenbuf_size=4000) */ - /* although the numbers above are not valid since long ago, the - point is still up-to-date and the comment still has its value - even if only as a historical artifact. --mj, July 1998 */ - param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); - if (!vc) - return -ENOMEM; - vc_cons[currcons].d = vc; - tty_port_init(&vc->port); - INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); - visual_init(vc, currcons, 1); - if (!*vc->vc_uni_pagedir_loc) - con_set_default_unimap(vc); - vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); - if (!vc->vc_screenbuf) { - kfree(vc); - vc_cons[currcons].d = NULL; - return -ENOMEM; - } - - /* If no drivers have overridden us and the user didn't pass a - boot option, default to displaying the cursor */ - if (global_cursor_default == -1) - global_cursor_default = 1; - - vc_init(vc, vc->vc_rows, vc->vc_cols, 1); - vcs_make_sysfs(currcons); - atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); - } - return 0; -} - -static inline int resize_screen(struct vc_data *vc, int width, int height, - int user) -{ - /* Resizes the resolution of the display adapater */ - int err = 0; - - if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) - err = vc->vc_sw->con_resize(vc, width, height, user); - - return err; -} - -/* - * Change # of rows and columns (0 means unchanged/the size of fg_console) - * [this is to be used together with some user program - * like resize that changes the hardware videomode] - */ -#define VC_RESIZE_MAXCOL (32767) -#define VC_RESIZE_MAXROW (32767) - -/** - * vc_do_resize - resizing method for the tty - * @tty: tty being resized - * @real_tty: real tty (different to tty if a pty/tty pair) - * @vc: virtual console private data - * @cols: columns - * @lines: lines - * - * Resize a virtual console, clipping according to the actual constraints. - * If the caller passes a tty structure then update the termios winsize - * information and perform any necessary signal handling. - * - * Caller must hold the console semaphore. Takes the termios mutex and - * ctrl_lock of the tty IFF a tty is passed. - */ - -static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, - unsigned int cols, unsigned int lines) -{ - unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; - unsigned long end; - unsigned int old_cols, old_rows, old_row_size, old_screen_size; - unsigned int new_cols, new_rows, new_row_size, new_screen_size; - unsigned int user; - unsigned short *newscreen; - - WARN_CONSOLE_UNLOCKED(); - - if (!vc) - return -ENXIO; - - user = vc->vc_resize_user; - vc->vc_resize_user = 0; - - if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) - return -EINVAL; - - new_cols = (cols ? cols : vc->vc_cols); - new_rows = (lines ? lines : vc->vc_rows); - new_row_size = new_cols << 1; - new_screen_size = new_row_size * new_rows; - - if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) - return 0; - - newscreen = kmalloc(new_screen_size, GFP_USER); - if (!newscreen) - return -ENOMEM; - - old_rows = vc->vc_rows; - old_cols = vc->vc_cols; - old_row_size = vc->vc_size_row; - old_screen_size = vc->vc_screenbuf_size; - - err = resize_screen(vc, new_cols, new_rows, user); - if (err) { - kfree(newscreen); - return err; - } - - vc->vc_rows = new_rows; - vc->vc_cols = new_cols; - vc->vc_size_row = new_row_size; - vc->vc_screenbuf_size = new_screen_size; - - rlth = min(old_row_size, new_row_size); - rrem = new_row_size - rlth; - old_origin = vc->vc_origin; - new_origin = (long) newscreen; - new_scr_end = new_origin + new_screen_size; - - if (vc->vc_y > new_rows) { - if (old_rows - vc->vc_y < new_rows) { - /* - * Cursor near the bottom, copy contents from the - * bottom of buffer - */ - old_origin += (old_rows - new_rows) * old_row_size; - } else { - /* - * Cursor is in no man's land, copy 1/2 screenful - * from the top and bottom of cursor position - */ - old_origin += (vc->vc_y - new_rows/2) * old_row_size; - } - } - - end = old_origin + old_row_size * min(old_rows, new_rows); - - update_attr(vc); - - while (old_origin < end) { - scr_memcpyw((unsigned short *) new_origin, - (unsigned short *) old_origin, rlth); - if (rrem) - scr_memsetw((void *)(new_origin + rlth), - vc->vc_video_erase_char, rrem); - old_origin += old_row_size; - new_origin += new_row_size; - } - if (new_scr_end > new_origin) - scr_memsetw((void *)new_origin, vc->vc_video_erase_char, - new_scr_end - new_origin); - kfree(vc->vc_screenbuf); - vc->vc_screenbuf = newscreen; - vc->vc_screenbuf_size = new_screen_size; - set_origin(vc); - - /* do part of a reset_terminal() */ - vc->vc_top = 0; - vc->vc_bottom = vc->vc_rows; - gotoxy(vc, vc->vc_x, vc->vc_y); - save_cur(vc); - - if (tty) { - /* Rewrite the requested winsize data with the actual - resulting sizes */ - struct winsize ws; - memset(&ws, 0, sizeof(ws)); - ws.ws_row = vc->vc_rows; - ws.ws_col = vc->vc_cols; - ws.ws_ypixel = vc->vc_scan_lines; - tty_do_resize(tty, &ws); - } - - if (CON_IS_VISIBLE(vc)) - update_screen(vc); - vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); - return err; -} - -/** - * vc_resize - resize a VT - * @vc: virtual console - * @cols: columns - * @rows: rows - * - * Resize a virtual console as seen from the console end of things. We - * use the common vc_do_resize methods to update the structures. The - * caller must hold the console sem to protect console internals and - * vc->port.tty - */ - -int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) -{ - return vc_do_resize(vc->port.tty, vc, cols, rows); -} - -/** - * vt_resize - resize a VT - * @tty: tty to resize - * @ws: winsize attributes - * - * Resize a virtual terminal. This is called by the tty layer as we - * register our own handler for resizing. The mutual helper does all - * the actual work. - * - * Takes the console sem and the called methods then take the tty - * termios_mutex and the tty ctrl_lock in that order. - */ -static int vt_resize(struct tty_struct *tty, struct winsize *ws) -{ - struct vc_data *vc = tty->driver_data; - int ret; - - acquire_console_sem(); - ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); - release_console_sem(); - return ret; -} - -void vc_deallocate(unsigned int currcons) -{ - WARN_CONSOLE_UNLOCKED(); - - if (vc_cons_allocated(currcons)) { - struct vc_data *vc = vc_cons[currcons].d; - struct vt_notifier_param param = { .vc = vc }; - - atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); - vcs_remove_sysfs(currcons); - vc->vc_sw->con_deinit(vc); - put_pid(vc->vt_pid); - module_put(vc->vc_sw->owner); - kfree(vc->vc_screenbuf); - if (currcons >= MIN_NR_CONSOLES) - kfree(vc); - vc_cons[currcons].d = NULL; - } -} - -/* - * VT102 emulator - */ - -#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) -#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) -#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) - -#define decarm VC_REPEAT -#define decckm VC_CKMODE -#define kbdapplic VC_APPLIC -#define lnm VC_CRLF - -/* - * this is what the terminal answers to a ESC-Z or csi0c query. - */ -#define VT100ID "\033[?1;2c" -#define VT102ID "\033[?6c" - -unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, - 8,12,10,14, 9,13,11,15 }; - -/* the default colour table, for VGA+ colour systems */ -int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, - 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; -int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, - 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; -int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, - 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; - -module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); -module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); -module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); - -/* - * gotoxy() must verify all boundaries, because the arguments - * might also be negative. If the given position is out of - * bounds, the cursor is placed at the nearest margin. - */ -static void gotoxy(struct vc_data *vc, int new_x, int new_y) -{ - int min_y, max_y; - - if (new_x < 0) - vc->vc_x = 0; - else { - if (new_x >= vc->vc_cols) - vc->vc_x = vc->vc_cols - 1; - else - vc->vc_x = new_x; - } - - if (vc->vc_decom) { - min_y = vc->vc_top; - max_y = vc->vc_bottom; - } else { - min_y = 0; - max_y = vc->vc_rows; - } - if (new_y < min_y) - vc->vc_y = min_y; - else if (new_y >= max_y) - vc->vc_y = max_y - 1; - else - vc->vc_y = new_y; - vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); - vc->vc_need_wrap = 0; -} - -/* for absolute user moves, when decom is set */ -static void gotoxay(struct vc_data *vc, int new_x, int new_y) -{ - gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); -} - -void scrollback(struct vc_data *vc, int lines) -{ - if (!lines) - lines = vc->vc_rows / 2; - scrolldelta(-lines); -} - -void scrollfront(struct vc_data *vc, int lines) -{ - if (!lines) - lines = vc->vc_rows / 2; - scrolldelta(lines); -} - -static void lf(struct vc_data *vc) -{ - /* don't scroll if above bottom of scrolling region, or - * if below scrolling region - */ - if (vc->vc_y + 1 == vc->vc_bottom) - scrup(vc, vc->vc_top, vc->vc_bottom, 1); - else if (vc->vc_y < vc->vc_rows - 1) { - vc->vc_y++; - vc->vc_pos += vc->vc_size_row; - } - vc->vc_need_wrap = 0; - notify_write(vc, '\n'); -} - -static void ri(struct vc_data *vc) -{ - /* don't scroll if below top of scrolling region, or - * if above scrolling region - */ - if (vc->vc_y == vc->vc_top) - scrdown(vc, vc->vc_top, vc->vc_bottom, 1); - else if (vc->vc_y > 0) { - vc->vc_y--; - vc->vc_pos -= vc->vc_size_row; - } - vc->vc_need_wrap = 0; -} - -static inline void cr(struct vc_data *vc) -{ - vc->vc_pos -= vc->vc_x << 1; - vc->vc_need_wrap = vc->vc_x = 0; - notify_write(vc, '\r'); -} - -static inline void bs(struct vc_data *vc) -{ - if (vc->vc_x) { - vc->vc_pos -= 2; - vc->vc_x--; - vc->vc_need_wrap = 0; - notify_write(vc, '\b'); - } -} - -static inline void del(struct vc_data *vc) -{ - /* ignored */ -} - -static void csi_J(struct vc_data *vc, int vpar) -{ - unsigned int count; - unsigned short * start; - - switch (vpar) { - case 0: /* erase from cursor to end of display */ - count = (vc->vc_scr_end - vc->vc_pos) >> 1; - start = (unsigned short *)vc->vc_pos; - if (DO_UPDATE(vc)) { - /* do in two stages */ - vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, - vc->vc_cols - vc->vc_x); - vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, - vc->vc_rows - vc->vc_y - 1, - vc->vc_cols); - } - break; - case 1: /* erase from start to cursor */ - count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; - start = (unsigned short *)vc->vc_origin; - if (DO_UPDATE(vc)) { - /* do in two stages */ - vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, - vc->vc_cols); - vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, - vc->vc_x + 1); - } - break; - case 2: /* erase whole display */ - count = vc->vc_cols * vc->vc_rows; - start = (unsigned short *)vc->vc_origin; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, 0, 0, - vc->vc_rows, - vc->vc_cols); - break; - default: - return; - } - scr_memsetw(start, vc->vc_video_erase_char, 2 * count); - vc->vc_need_wrap = 0; -} - -static void csi_K(struct vc_data *vc, int vpar) -{ - unsigned int count; - unsigned short * start; - - switch (vpar) { - case 0: /* erase from cursor to end of line */ - count = vc->vc_cols - vc->vc_x; - start = (unsigned short *)vc->vc_pos; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, - vc->vc_cols - vc->vc_x); - break; - case 1: /* erase from start of line to cursor */ - start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); - count = vc->vc_x + 1; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, - vc->vc_x + 1); - break; - case 2: /* erase whole line */ - start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); - count = vc->vc_cols; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, - vc->vc_cols); - break; - default: - return; - } - scr_memsetw(start, vc->vc_video_erase_char, 2 * count); - vc->vc_need_wrap = 0; -} - -static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ -{ /* not vt100? */ - int count; - - if (!vpar) - vpar++; - count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; - - scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); - vc->vc_need_wrap = 0; -} - -static void default_attr(struct vc_data *vc) -{ - vc->vc_intensity = 1; - vc->vc_italic = 0; - vc->vc_underline = 0; - vc->vc_reverse = 0; - vc->vc_blink = 0; - vc->vc_color = vc->vc_def_color; -} - -/* console_sem is held */ -static void csi_m(struct vc_data *vc) -{ - int i; - - for (i = 0; i <= vc->vc_npar; i++) - switch (vc->vc_par[i]) { - case 0: /* all attributes off */ - default_attr(vc); - break; - case 1: - vc->vc_intensity = 2; - break; - case 2: - vc->vc_intensity = 0; - break; - case 3: - vc->vc_italic = 1; - break; - case 4: - vc->vc_underline = 1; - break; - case 5: - vc->vc_blink = 1; - break; - case 7: - vc->vc_reverse = 1; - break; - case 10: /* ANSI X3.64-1979 (SCO-ish?) - * Select primary font, don't display - * control chars if defined, don't set - * bit 8 on output. - */ - vc->vc_translate = set_translate(vc->vc_charset == 0 - ? vc->vc_G0_charset - : vc->vc_G1_charset, vc); - vc->vc_disp_ctrl = 0; - vc->vc_toggle_meta = 0; - break; - case 11: /* ANSI X3.64-1979 (SCO-ish?) - * Select first alternate font, lets - * chars < 32 be displayed as ROM chars. - */ - vc->vc_translate = set_translate(IBMPC_MAP, vc); - vc->vc_disp_ctrl = 1; - vc->vc_toggle_meta = 0; - break; - case 12: /* ANSI X3.64-1979 (SCO-ish?) - * Select second alternate font, toggle - * high bit before displaying as ROM char. - */ - vc->vc_translate = set_translate(IBMPC_MAP, vc); - vc->vc_disp_ctrl = 1; - vc->vc_toggle_meta = 1; - break; - case 21: - case 22: - vc->vc_intensity = 1; - break; - case 23: - vc->vc_italic = 0; - break; - case 24: - vc->vc_underline = 0; - break; - case 25: - vc->vc_blink = 0; - break; - case 27: - vc->vc_reverse = 0; - break; - case 38: /* ANSI X3.64-1979 (SCO-ish?) - * Enables underscore, white foreground - * with white underscore (Linux - use - * default foreground). - */ - vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); - vc->vc_underline = 1; - break; - case 39: /* ANSI X3.64-1979 (SCO-ish?) - * Disable underline option. - * Reset colour to default? It did this - * before... - */ - vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); - vc->vc_underline = 0; - break; - case 49: - vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); - break; - default: - if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) - vc->vc_color = color_table[vc->vc_par[i] - 30] - | (vc->vc_color & 0xf0); - else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) - vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) - | (vc->vc_color & 0x0f); - break; - } - update_attr(vc); -} - -static void respond_string(const char *p, struct tty_struct *tty) -{ - while (*p) { - tty_insert_flip_char(tty, *p, 0); - p++; - } - con_schedule_flip(tty); -} - -static void cursor_report(struct vc_data *vc, struct tty_struct *tty) -{ - char buf[40]; - - sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); - respond_string(buf, tty); -} - -static inline void status_report(struct tty_struct *tty) -{ - respond_string("\033[0n", tty); /* Terminal ok */ -} - -static inline void respond_ID(struct tty_struct * tty) -{ - respond_string(VT102ID, tty); -} - -void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) -{ - char buf[8]; - - sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), - (char)('!' + mry)); - respond_string(buf, tty); -} - -/* invoked via ioctl(TIOCLINUX) and through set_selection */ -int mouse_reporting(void) -{ - return vc_cons[fg_console].d->vc_report_mouse; -} - -/* console_sem is held */ -static void set_mode(struct vc_data *vc, int on_off) -{ - int i; - - for (i = 0; i <= vc->vc_npar; i++) - if (vc->vc_ques) { - switch(vc->vc_par[i]) { /* DEC private modes set/reset */ - case 1: /* Cursor keys send ^[Ox/^[[x */ - if (on_off) - set_kbd(vc, decckm); - else - clr_kbd(vc, decckm); - break; - case 3: /* 80/132 mode switch unimplemented */ - vc->vc_deccolm = on_off; -#if 0 - vc_resize(deccolm ? 132 : 80, vc->vc_rows); - /* this alone does not suffice; some user mode - utility has to change the hardware regs */ -#endif - break; - case 5: /* Inverted screen on/off */ - if (vc->vc_decscnm != on_off) { - vc->vc_decscnm = on_off; - invert_screen(vc, 0, vc->vc_screenbuf_size, 0); - update_attr(vc); - } - break; - case 6: /* Origin relative/absolute */ - vc->vc_decom = on_off; - gotoxay(vc, 0, 0); - break; - case 7: /* Autowrap on/off */ - vc->vc_decawm = on_off; - break; - case 8: /* Autorepeat on/off */ - if (on_off) - set_kbd(vc, decarm); - else - clr_kbd(vc, decarm); - break; - case 9: - vc->vc_report_mouse = on_off ? 1 : 0; - break; - case 25: /* Cursor on/off */ - vc->vc_deccm = on_off; - break; - case 1000: - vc->vc_report_mouse = on_off ? 2 : 0; - break; - } - } else { - switch(vc->vc_par[i]) { /* ANSI modes set/reset */ - case 3: /* Monitor (display ctrls) */ - vc->vc_disp_ctrl = on_off; - break; - case 4: /* Insert Mode on/off */ - vc->vc_decim = on_off; - break; - case 20: /* Lf, Enter == CrLf/Lf */ - if (on_off) - set_kbd(vc, lnm); - else - clr_kbd(vc, lnm); - break; - } - } -} - -/* console_sem is held */ -static void setterm_command(struct vc_data *vc) -{ - switch(vc->vc_par[0]) { - case 1: /* set color for underline mode */ - if (vc->vc_can_do_color && - vc->vc_par[1] < 16) { - vc->vc_ulcolor = color_table[vc->vc_par[1]]; - if (vc->vc_underline) - update_attr(vc); - } - break; - case 2: /* set color for half intensity mode */ - if (vc->vc_can_do_color && - vc->vc_par[1] < 16) { - vc->vc_halfcolor = color_table[vc->vc_par[1]]; - if (vc->vc_intensity == 0) - update_attr(vc); - } - break; - case 8: /* store colors as defaults */ - vc->vc_def_color = vc->vc_attr; - if (vc->vc_hi_font_mask == 0x100) - vc->vc_def_color >>= 1; - default_attr(vc); - update_attr(vc); - break; - case 9: /* set blanking interval */ - blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; - poke_blanked_console(); - break; - case 10: /* set bell frequency in Hz */ - if (vc->vc_npar >= 1) - vc->vc_bell_pitch = vc->vc_par[1]; - else - vc->vc_bell_pitch = DEFAULT_BELL_PITCH; - break; - case 11: /* set bell duration in msec */ - if (vc->vc_npar >= 1) - vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? - vc->vc_par[1] * HZ / 1000 : 0; - else - vc->vc_bell_duration = DEFAULT_BELL_DURATION; - break; - case 12: /* bring specified console to the front */ - if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) - set_console(vc->vc_par[1] - 1); - break; - case 13: /* unblank the screen */ - poke_blanked_console(); - break; - case 14: /* set vesa powerdown interval */ - vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; - break; - case 15: /* activate the previous console */ - set_console(last_console); - break; - } -} - -/* console_sem is held */ -static void csi_at(struct vc_data *vc, unsigned int nr) -{ - if (nr > vc->vc_cols - vc->vc_x) - nr = vc->vc_cols - vc->vc_x; - else if (!nr) - nr = 1; - insert_char(vc, nr); -} - -/* console_sem is held */ -static void csi_L(struct vc_data *vc, unsigned int nr) -{ - if (nr > vc->vc_rows - vc->vc_y) - nr = vc->vc_rows - vc->vc_y; - else if (!nr) - nr = 1; - scrdown(vc, vc->vc_y, vc->vc_bottom, nr); - vc->vc_need_wrap = 0; -} - -/* console_sem is held */ -static void csi_P(struct vc_data *vc, unsigned int nr) -{ - if (nr > vc->vc_cols - vc->vc_x) - nr = vc->vc_cols - vc->vc_x; - else if (!nr) - nr = 1; - delete_char(vc, nr); -} - -/* console_sem is held */ -static void csi_M(struct vc_data *vc, unsigned int nr) -{ - if (nr > vc->vc_rows - vc->vc_y) - nr = vc->vc_rows - vc->vc_y; - else if (!nr) - nr=1; - scrup(vc, vc->vc_y, vc->vc_bottom, nr); - vc->vc_need_wrap = 0; -} - -/* console_sem is held (except via vc_init->reset_terminal */ -static void save_cur(struct vc_data *vc) -{ - vc->vc_saved_x = vc->vc_x; - vc->vc_saved_y = vc->vc_y; - vc->vc_s_intensity = vc->vc_intensity; - vc->vc_s_italic = vc->vc_italic; - vc->vc_s_underline = vc->vc_underline; - vc->vc_s_blink = vc->vc_blink; - vc->vc_s_reverse = vc->vc_reverse; - vc->vc_s_charset = vc->vc_charset; - vc->vc_s_color = vc->vc_color; - vc->vc_saved_G0 = vc->vc_G0_charset; - vc->vc_saved_G1 = vc->vc_G1_charset; -} - -/* console_sem is held */ -static void restore_cur(struct vc_data *vc) -{ - gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); - vc->vc_intensity = vc->vc_s_intensity; - vc->vc_italic = vc->vc_s_italic; - vc->vc_underline = vc->vc_s_underline; - vc->vc_blink = vc->vc_s_blink; - vc->vc_reverse = vc->vc_s_reverse; - vc->vc_charset = vc->vc_s_charset; - vc->vc_color = vc->vc_s_color; - vc->vc_G0_charset = vc->vc_saved_G0; - vc->vc_G1_charset = vc->vc_saved_G1; - vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); - update_attr(vc); - vc->vc_need_wrap = 0; -} - -enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, - EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, - ESpalette }; - -/* console_sem is held (except via vc_init()) */ -static void reset_terminal(struct vc_data *vc, int do_clear) -{ - vc->vc_top = 0; - vc->vc_bottom = vc->vc_rows; - vc->vc_state = ESnormal; - vc->vc_ques = 0; - vc->vc_translate = set_translate(LAT1_MAP, vc); - vc->vc_G0_charset = LAT1_MAP; - vc->vc_G1_charset = GRAF_MAP; - vc->vc_charset = 0; - vc->vc_need_wrap = 0; - vc->vc_report_mouse = 0; - vc->vc_utf = default_utf8; - vc->vc_utf_count = 0; - - vc->vc_disp_ctrl = 0; - vc->vc_toggle_meta = 0; - - vc->vc_decscnm = 0; - vc->vc_decom = 0; - vc->vc_decawm = 1; - vc->vc_deccm = global_cursor_default; - vc->vc_decim = 0; - - set_kbd(vc, decarm); - clr_kbd(vc, decckm); - clr_kbd(vc, kbdapplic); - clr_kbd(vc, lnm); - kbd_table[vc->vc_num].lockstate = 0; - kbd_table[vc->vc_num].slockstate = 0; - kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; - kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; - /* do not do set_leds here because this causes an endless tasklet loop - when the keyboard hasn't been initialized yet */ - - vc->vc_cursor_type = cur_default; - vc->vc_complement_mask = vc->vc_s_complement_mask; - - default_attr(vc); - update_attr(vc); - - vc->vc_tab_stop[0] = 0x01010100; - vc->vc_tab_stop[1] = - vc->vc_tab_stop[2] = - vc->vc_tab_stop[3] = - vc->vc_tab_stop[4] = - vc->vc_tab_stop[5] = - vc->vc_tab_stop[6] = - vc->vc_tab_stop[7] = 0x01010101; - - vc->vc_bell_pitch = DEFAULT_BELL_PITCH; - vc->vc_bell_duration = DEFAULT_BELL_DURATION; - - gotoxy(vc, 0, 0); - save_cur(vc); - if (do_clear) - csi_J(vc, 2); -} - -/* console_sem is held */ -static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) -{ - /* - * Control characters can be used in the _middle_ - * of an escape sequence. - */ - switch (c) { - case 0: - return; - case 7: - if (vc->vc_bell_duration) - kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); - return; - case 8: - bs(vc); - return; - case 9: - vc->vc_pos -= (vc->vc_x << 1); - while (vc->vc_x < vc->vc_cols - 1) { - vc->vc_x++; - if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) - break; - } - vc->vc_pos += (vc->vc_x << 1); - notify_write(vc, '\t'); - return; - case 10: case 11: case 12: - lf(vc); - if (!is_kbd(vc, lnm)) - return; - case 13: - cr(vc); - return; - case 14: - vc->vc_charset = 1; - vc->vc_translate = set_translate(vc->vc_G1_charset, vc); - vc->vc_disp_ctrl = 1; - return; - case 15: - vc->vc_charset = 0; - vc->vc_translate = set_translate(vc->vc_G0_charset, vc); - vc->vc_disp_ctrl = 0; - return; - case 24: case 26: - vc->vc_state = ESnormal; - return; - case 27: - vc->vc_state = ESesc; - return; - case 127: - del(vc); - return; - case 128+27: - vc->vc_state = ESsquare; - return; - } - switch(vc->vc_state) { - case ESesc: - vc->vc_state = ESnormal; - switch (c) { - case '[': - vc->vc_state = ESsquare; - return; - case ']': - vc->vc_state = ESnonstd; - return; - case '%': - vc->vc_state = ESpercent; - return; - case 'E': - cr(vc); - lf(vc); - return; - case 'M': - ri(vc); - return; - case 'D': - lf(vc); - return; - case 'H': - vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); - return; - case 'Z': - respond_ID(tty); - return; - case '7': - save_cur(vc); - return; - case '8': - restore_cur(vc); - return; - case '(': - vc->vc_state = ESsetG0; - return; - case ')': - vc->vc_state = ESsetG1; - return; - case '#': - vc->vc_state = EShash; - return; - case 'c': - reset_terminal(vc, 1); - return; - case '>': /* Numeric keypad */ - clr_kbd(vc, kbdapplic); - return; - case '=': /* Appl. keypad */ - set_kbd(vc, kbdapplic); - return; - } - return; - case ESnonstd: - if (c=='P') { /* palette escape sequence */ - for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) - vc->vc_par[vc->vc_npar] = 0; - vc->vc_npar = 0; - vc->vc_state = ESpalette; - return; - } else if (c=='R') { /* reset palette */ - reset_palette(vc); - vc->vc_state = ESnormal; - } else - vc->vc_state = ESnormal; - return; - case ESpalette: - if (isxdigit(c)) { - vc->vc_par[vc->vc_npar++] = hex_to_bin(c); - if (vc->vc_npar == 7) { - int i = vc->vc_par[0] * 3, j = 1; - vc->vc_palette[i] = 16 * vc->vc_par[j++]; - vc->vc_palette[i++] += vc->vc_par[j++]; - vc->vc_palette[i] = 16 * vc->vc_par[j++]; - vc->vc_palette[i++] += vc->vc_par[j++]; - vc->vc_palette[i] = 16 * vc->vc_par[j++]; - vc->vc_palette[i] += vc->vc_par[j]; - set_palette(vc); - vc->vc_state = ESnormal; - } - } else - vc->vc_state = ESnormal; - return; - case ESsquare: - for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) - vc->vc_par[vc->vc_npar] = 0; - vc->vc_npar = 0; - vc->vc_state = ESgetpars; - if (c == '[') { /* Function key */ - vc->vc_state=ESfunckey; - return; - } - vc->vc_ques = (c == '?'); - if (vc->vc_ques) - return; - case ESgetpars: - if (c == ';' && vc->vc_npar < NPAR - 1) { - vc->vc_npar++; - return; - } else if (c>='0' && c<='9') { - vc->vc_par[vc->vc_npar] *= 10; - vc->vc_par[vc->vc_npar] += c - '0'; - return; - } else - vc->vc_state = ESgotpars; - case ESgotpars: - vc->vc_state = ESnormal; - switch(c) { - case 'h': - set_mode(vc, 1); - return; - case 'l': - set_mode(vc, 0); - return; - case 'c': - if (vc->vc_ques) { - if (vc->vc_par[0]) - vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); - else - vc->vc_cursor_type = cur_default; - return; - } - break; - case 'm': - if (vc->vc_ques) { - clear_selection(); - if (vc->vc_par[0]) - vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; - else - vc->vc_complement_mask = vc->vc_s_complement_mask; - return; - } - break; - case 'n': - if (!vc->vc_ques) { - if (vc->vc_par[0] == 5) - status_report(tty); - else if (vc->vc_par[0] == 6) - cursor_report(vc, tty); - } - return; - } - if (vc->vc_ques) { - vc->vc_ques = 0; - return; - } - switch(c) { - case 'G': case '`': - if (vc->vc_par[0]) - vc->vc_par[0]--; - gotoxy(vc, vc->vc_par[0], vc->vc_y); - return; - case 'A': - if (!vc->vc_par[0]) - vc->vc_par[0]++; - gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); - return; - case 'B': case 'e': - if (!vc->vc_par[0]) - vc->vc_par[0]++; - gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); - return; - case 'C': case 'a': - if (!vc->vc_par[0]) - vc->vc_par[0]++; - gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); - return; - case 'D': - if (!vc->vc_par[0]) - vc->vc_par[0]++; - gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); - return; - case 'E': - if (!vc->vc_par[0]) - vc->vc_par[0]++; - gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); - return; - case 'F': - if (!vc->vc_par[0]) - vc->vc_par[0]++; - gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); - return; - case 'd': - if (vc->vc_par[0]) - vc->vc_par[0]--; - gotoxay(vc, vc->vc_x ,vc->vc_par[0]); - return; - case 'H': case 'f': - if (vc->vc_par[0]) - vc->vc_par[0]--; - if (vc->vc_par[1]) - vc->vc_par[1]--; - gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); - return; - case 'J': - csi_J(vc, vc->vc_par[0]); - return; - case 'K': - csi_K(vc, vc->vc_par[0]); - return; - case 'L': - csi_L(vc, vc->vc_par[0]); - return; - case 'M': - csi_M(vc, vc->vc_par[0]); - return; - case 'P': - csi_P(vc, vc->vc_par[0]); - return; - case 'c': - if (!vc->vc_par[0]) - respond_ID(tty); - return; - case 'g': - if (!vc->vc_par[0]) - vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); - else if (vc->vc_par[0] == 3) { - vc->vc_tab_stop[0] = - vc->vc_tab_stop[1] = - vc->vc_tab_stop[2] = - vc->vc_tab_stop[3] = - vc->vc_tab_stop[4] = - vc->vc_tab_stop[5] = - vc->vc_tab_stop[6] = - vc->vc_tab_stop[7] = 0; - } - return; - case 'm': - csi_m(vc); - return; - case 'q': /* DECLL - but only 3 leds */ - /* map 0,1,2,3 to 0,1,2,4 */ - if (vc->vc_par[0] < 4) - setledstate(kbd_table + vc->vc_num, - (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); - return; - case 'r': - if (!vc->vc_par[0]) - vc->vc_par[0]++; - if (!vc->vc_par[1]) - vc->vc_par[1] = vc->vc_rows; - /* Minimum allowed region is 2 lines */ - if (vc->vc_par[0] < vc->vc_par[1] && - vc->vc_par[1] <= vc->vc_rows) { - vc->vc_top = vc->vc_par[0] - 1; - vc->vc_bottom = vc->vc_par[1]; - gotoxay(vc, 0, 0); - } - return; - case 's': - save_cur(vc); - return; - case 'u': - restore_cur(vc); - return; - case 'X': - csi_X(vc, vc->vc_par[0]); - return; - case '@': - csi_at(vc, vc->vc_par[0]); - return; - case ']': /* setterm functions */ - setterm_command(vc); - return; - } - return; - case ESpercent: - vc->vc_state = ESnormal; - switch (c) { - case '@': /* defined in ISO 2022 */ - vc->vc_utf = 0; - return; - case 'G': /* prelim official escape code */ - case '8': /* retained for compatibility */ - vc->vc_utf = 1; - return; - } - return; - case ESfunckey: - vc->vc_state = ESnormal; - return; - case EShash: - vc->vc_state = ESnormal; - if (c == '8') { - /* DEC screen alignment test. kludge :-) */ - vc->vc_video_erase_char = - (vc->vc_video_erase_char & 0xff00) | 'E'; - csi_J(vc, 2); - vc->vc_video_erase_char = - (vc->vc_video_erase_char & 0xff00) | ' '; - do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); - } - return; - case ESsetG0: - if (c == '0') - vc->vc_G0_charset = GRAF_MAP; - else if (c == 'B') - vc->vc_G0_charset = LAT1_MAP; - else if (c == 'U') - vc->vc_G0_charset = IBMPC_MAP; - else if (c == 'K') - vc->vc_G0_charset = USER_MAP; - if (vc->vc_charset == 0) - vc->vc_translate = set_translate(vc->vc_G0_charset, vc); - vc->vc_state = ESnormal; - return; - case ESsetG1: - if (c == '0') - vc->vc_G1_charset = GRAF_MAP; - else if (c == 'B') - vc->vc_G1_charset = LAT1_MAP; - else if (c == 'U') - vc->vc_G1_charset = IBMPC_MAP; - else if (c == 'K') - vc->vc_G1_charset = USER_MAP; - if (vc->vc_charset == 1) - vc->vc_translate = set_translate(vc->vc_G1_charset, vc); - vc->vc_state = ESnormal; - return; - default: - vc->vc_state = ESnormal; - } -} - -/* This is a temporary buffer used to prepare a tty console write - * so that we can easily avoid touching user space while holding the - * console spinlock. It is allocated in con_init and is shared by - * this code and the vc_screen read/write tty calls. - * - * We have to allocate this statically in the kernel data section - * since console_init (and thus con_init) are called before any - * kernel memory allocation is available. - */ -char con_buf[CON_BUF_SIZE]; -DEFINE_MUTEX(con_buf_mtx); - -/* is_double_width() is based on the wcwidth() implementation by - * Markus Kuhn -- 2007-05-26 (Unicode 5.0) - * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c - */ -struct interval { - uint32_t first; - uint32_t last; -}; - -static int bisearch(uint32_t ucs, const struct interval *table, int max) -{ - int min = 0; - int mid; - - if (ucs < table[0].first || ucs > table[max].last) - return 0; - while (max >= min) { - mid = (min + max) / 2; - if (ucs > table[mid].last) - min = mid + 1; - else if (ucs < table[mid].first) - max = mid - 1; - else - return 1; - } - return 0; -} - -static int is_double_width(uint32_t ucs) -{ - static const struct interval double_width[] = { - { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, - { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, - { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, - { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } - }; - return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); -} - -/* acquires console_sem */ -static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) -{ -#ifdef VT_BUF_VRAM_ONLY -#define FLUSH do { } while(0); -#else -#define FLUSH if (draw_x >= 0) { \ - vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ - draw_x = -1; \ - } -#endif - - int c, tc, ok, n = 0, draw_x = -1; - unsigned int currcons; - unsigned long draw_from = 0, draw_to = 0; - struct vc_data *vc; - unsigned char vc_attr; - struct vt_notifier_param param; - uint8_t rescan; - uint8_t inverse; - uint8_t width; - u16 himask, charmask; - - if (in_interrupt()) - return count; - - might_sleep(); - - acquire_console_sem(); - vc = tty->driver_data; - if (vc == NULL) { - printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); - release_console_sem(); - return 0; - } - - currcons = vc->vc_num; - if (!vc_cons_allocated(currcons)) { - /* could this happen? */ - printk_once("con_write: tty %d not allocated\n", currcons+1); - release_console_sem(); - return 0; - } - - himask = vc->vc_hi_font_mask; - charmask = himask ? 0x1ff : 0xff; - - /* undraw cursor first */ - if (IS_FG(vc)) - hide_cursor(vc); - - param.vc = vc; - - while (!tty->stopped && count) { - int orig = *buf; - c = orig; - buf++; - n++; - count--; - rescan = 0; - inverse = 0; - width = 1; - - /* Do no translation at all in control states */ - if (vc->vc_state != ESnormal) { - tc = c; - } else if (vc->vc_utf && !vc->vc_disp_ctrl) { - /* Combine UTF-8 into Unicode in vc_utf_char. - * vc_utf_count is the number of continuation bytes still - * expected to arrive. - * vc_npar is the number of continuation bytes arrived so - * far - */ -rescan_last_byte: - if ((c & 0xc0) == 0x80) { - /* Continuation byte received */ - static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; - if (vc->vc_utf_count) { - vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); - vc->vc_npar++; - if (--vc->vc_utf_count) { - /* Still need some bytes */ - continue; - } - /* Got a whole character */ - c = vc->vc_utf_char; - /* Reject overlong sequences */ - if (c <= utf8_length_changes[vc->vc_npar - 1] || - c > utf8_length_changes[vc->vc_npar]) - c = 0xfffd; - } else { - /* Unexpected continuation byte */ - vc->vc_utf_count = 0; - c = 0xfffd; - } - } else { - /* Single ASCII byte or first byte of a sequence received */ - if (vc->vc_utf_count) { - /* Continuation byte expected */ - rescan = 1; - vc->vc_utf_count = 0; - c = 0xfffd; - } else if (c > 0x7f) { - /* First byte of a multibyte sequence received */ - vc->vc_npar = 0; - if ((c & 0xe0) == 0xc0) { - vc->vc_utf_count = 1; - vc->vc_utf_char = (c & 0x1f); - } else if ((c & 0xf0) == 0xe0) { - vc->vc_utf_count = 2; - vc->vc_utf_char = (c & 0x0f); - } else if ((c & 0xf8) == 0xf0) { - vc->vc_utf_count = 3; - vc->vc_utf_char = (c & 0x07); - } else if ((c & 0xfc) == 0xf8) { - vc->vc_utf_count = 4; - vc->vc_utf_char = (c & 0x03); - } else if ((c & 0xfe) == 0xfc) { - vc->vc_utf_count = 5; - vc->vc_utf_char = (c & 0x01); - } else { - /* 254 and 255 are invalid */ - c = 0xfffd; - } - if (vc->vc_utf_count) { - /* Still need some bytes */ - continue; - } - } - /* Nothing to do if an ASCII byte was received */ - } - /* End of UTF-8 decoding. */ - /* c is the received character, or U+FFFD for invalid sequences. */ - /* Replace invalid Unicode code points with U+FFFD too */ - if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) - c = 0xfffd; - tc = c; - } else { /* no utf or alternate charset mode */ - tc = vc_translate(vc, c); - } - - param.c = tc; - if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, - ¶m) == NOTIFY_STOP) - continue; - - /* If the original code was a control character we - * only allow a glyph to be displayed if the code is - * not normally used (such as for cursor movement) or - * if the disp_ctrl mode has been explicitly enabled. - * Certain characters (as given by the CTRL_ALWAYS - * bitmap) are always displayed as control characters, - * as the console would be pretty useless without - * them; to display an arbitrary font position use the - * direct-to-font zone in UTF-8 mode. - */ - ok = tc && (c >= 32 || - !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : - vc->vc_utf || ((CTRL_ACTION >> c) & 1))) - && (c != 127 || vc->vc_disp_ctrl) - && (c != 128+27); - - if (vc->vc_state == ESnormal && ok) { - if (vc->vc_utf && !vc->vc_disp_ctrl) { - if (is_double_width(c)) - width = 2; - } - /* Now try to find out how to display it */ - tc = conv_uni_to_pc(vc, tc); - if (tc & ~charmask) { - if (tc == -1 || tc == -2) { - continue; /* nothing to display */ - } - /* Glyph not found */ - if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { - /* In legacy mode use the glyph we get by a 1:1 mapping. - This would make absolutely no sense with Unicode in mind, - but do this for ASCII characters since a font may lack - Unicode mapping info and we don't want to end up with - having question marks only. */ - tc = c; - } else { - /* Display U+FFFD. If it's not found, display an inverse question mark. */ - tc = conv_uni_to_pc(vc, 0xfffd); - if (tc < 0) { - inverse = 1; - tc = conv_uni_to_pc(vc, '?'); - if (tc < 0) tc = '?'; - } - } - } - - if (!inverse) { - vc_attr = vc->vc_attr; - } else { - /* invert vc_attr */ - if (!vc->vc_can_do_color) { - vc_attr = (vc->vc_attr) ^ 0x08; - } else if (vc->vc_hi_font_mask == 0x100) { - vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); - } else { - vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); - } - FLUSH - } - - while (1) { - if (vc->vc_need_wrap || vc->vc_decim) - FLUSH - if (vc->vc_need_wrap) { - cr(vc); - lf(vc); - } - if (vc->vc_decim) - insert_char(vc, 1); - scr_writew(himask ? - ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : - (vc_attr << 8) + tc, - (u16 *) vc->vc_pos); - if (DO_UPDATE(vc) && draw_x < 0) { - draw_x = vc->vc_x; - draw_from = vc->vc_pos; - } - if (vc->vc_x == vc->vc_cols - 1) { - vc->vc_need_wrap = vc->vc_decawm; - draw_to = vc->vc_pos + 2; - } else { - vc->vc_x++; - draw_to = (vc->vc_pos += 2); - } - - if (!--width) break; - - tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ - if (tc < 0) tc = ' '; - } - notify_write(vc, c); - - if (inverse) { - FLUSH - } - - if (rescan) { - rescan = 0; - inverse = 0; - width = 1; - c = orig; - goto rescan_last_byte; - } - continue; - } - FLUSH - do_con_trol(tty, vc, orig); - } - FLUSH - console_conditional_schedule(); - release_console_sem(); - notify_update(vc); - return n; -#undef FLUSH -} - -/* - * This is the console switching callback. - * - * Doing console switching in a process context allows - * us to do the switches asynchronously (needed when we want - * to switch due to a keyboard interrupt). Synchronization - * with other console code and prevention of re-entrancy is - * ensured with console_sem. - */ -static void console_callback(struct work_struct *ignored) -{ - acquire_console_sem(); - - if (want_console >= 0) { - if (want_console != fg_console && - vc_cons_allocated(want_console)) { - hide_cursor(vc_cons[fg_console].d); - change_console(vc_cons[want_console].d); - /* we only changed when the console had already - been allocated - a new console is not created - in an interrupt routine */ - } - want_console = -1; - } - if (do_poke_blanked_console) { /* do not unblank for a LED change */ - do_poke_blanked_console = 0; - poke_blanked_console(); - } - if (scrollback_delta) { - struct vc_data *vc = vc_cons[fg_console].d; - clear_selection(); - if (vc->vc_mode == KD_TEXT) - vc->vc_sw->con_scrolldelta(vc, scrollback_delta); - scrollback_delta = 0; - } - if (blank_timer_expired) { - do_blank_screen(0); - blank_timer_expired = 0; - } - notify_update(vc_cons[fg_console].d); - - release_console_sem(); -} - -int set_console(int nr) -{ - struct vc_data *vc = vc_cons[fg_console].d; - - if (!vc_cons_allocated(nr) || vt_dont_switch || - (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { - - /* - * Console switch will fail in console_callback() or - * change_console() so there is no point scheduling - * the callback - * - * Existing set_console() users don't check the return - * value so this shouldn't break anything - */ - return -EINVAL; - } - - want_console = nr; - schedule_console_callback(); - - return 0; -} - -struct tty_driver *console_driver; - -#ifdef CONFIG_VT_CONSOLE - -/** - * vt_kmsg_redirect() - Sets/gets the kernel message console - * @new: The new virtual terminal number or -1 if the console should stay - * unchanged - * - * By default, the kernel messages are always printed on the current virtual - * console. However, the user may modify that default with the - * TIOCL_SETKMSGREDIRECT ioctl call. - * - * This function sets the kernel message console to be @new. It returns the old - * virtual console number. The virtual terminal number 0 (both as parameter and - * return value) means no redirection (i.e. always printed on the currently - * active console). - * - * The parameter -1 means that only the current console is returned, but the - * value is not modified. You may use the macro vt_get_kmsg_redirect() in that - * case to make the code more understandable. - * - * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores - * the parameter and always returns 0. - */ -int vt_kmsg_redirect(int new) -{ - static int kmsg_con; - - if (new != -1) - return xchg(&kmsg_con, new); - else - return kmsg_con; -} - -/* - * Console on virtual terminal - * - * The console must be locked when we get here. - */ - -static void vt_console_print(struct console *co, const char *b, unsigned count) -{ - struct vc_data *vc = vc_cons[fg_console].d; - unsigned char c; - static DEFINE_SPINLOCK(printing_lock); - const ushort *start; - ushort cnt = 0; - ushort myx; - int kmsg_console; - - /* console busy or not yet initialized */ - if (!printable) - return; - if (!spin_trylock(&printing_lock)) - return; - - kmsg_console = vt_get_kmsg_redirect(); - if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) - vc = vc_cons[kmsg_console - 1].d; - - /* read `x' only after setting currcons properly (otherwise - the `x' macro will read the x of the foreground console). */ - myx = vc->vc_x; - - if (!vc_cons_allocated(fg_console)) { - /* impossible */ - /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ - goto quit; - } - - if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) - goto quit; - - /* undraw cursor first */ - if (IS_FG(vc)) - hide_cursor(vc); - - start = (ushort *)vc->vc_pos; - - /* Contrived structure to try to emulate original need_wrap behaviour - * Problems caused when we have need_wrap set on '\n' character */ - while (count--) { - c = *b++; - if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { - if (cnt > 0) { - if (CON_IS_VISIBLE(vc)) - vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); - vc->vc_x += cnt; - if (vc->vc_need_wrap) - vc->vc_x--; - cnt = 0; - } - if (c == 8) { /* backspace */ - bs(vc); - start = (ushort *)vc->vc_pos; - myx = vc->vc_x; - continue; - } - if (c != 13) - lf(vc); - cr(vc); - start = (ushort *)vc->vc_pos; - myx = vc->vc_x; - if (c == 10 || c == 13) - continue; - } - scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); - notify_write(vc, c); - cnt++; - if (myx == vc->vc_cols - 1) { - vc->vc_need_wrap = 1; - continue; - } - vc->vc_pos += 2; - myx++; - } - if (cnt > 0) { - if (CON_IS_VISIBLE(vc)) - vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); - vc->vc_x += cnt; - if (vc->vc_x == vc->vc_cols) { - vc->vc_x--; - vc->vc_need_wrap = 1; - } - } - set_cursor(vc); - notify_update(vc); - -quit: - spin_unlock(&printing_lock); -} - -static struct tty_driver *vt_console_device(struct console *c, int *index) -{ - *index = c->index ? c->index-1 : fg_console; - return console_driver; -} - -static struct console vt_console_driver = { - .name = "tty", - .write = vt_console_print, - .device = vt_console_device, - .unblank = unblank_screen, - .flags = CON_PRINTBUFFER, - .index = -1, -}; -#endif - -/* - * Handling of Linux-specific VC ioctls - */ - -/* - * Generally a bit racy with respect to console_sem(). - * - * There are some functions which don't need it. - * - * There are some functions which can sleep for arbitrary periods - * (paste_selection) but we don't need the lock there anyway. - * - * set_selection has locking, and definitely needs it - */ - -int tioclinux(struct tty_struct *tty, unsigned long arg) -{ - char type, data; - char __user *p = (char __user *)arg; - int lines; - int ret; - - if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) - return -EPERM; - if (get_user(type, p)) - return -EFAULT; - ret = 0; - - switch (type) - { - case TIOCL_SETSEL: - acquire_console_sem(); - ret = set_selection((struct tiocl_selection __user *)(p+1), tty); - release_console_sem(); - break; - case TIOCL_PASTESEL: - ret = paste_selection(tty); - break; - case TIOCL_UNBLANKSCREEN: - acquire_console_sem(); - unblank_screen(); - release_console_sem(); - break; - case TIOCL_SELLOADLUT: - ret = sel_loadlut(p); - break; - case TIOCL_GETSHIFTSTATE: - - /* - * Make it possible to react to Shift+Mousebutton. - * Note that 'shift_state' is an undocumented - * kernel-internal variable; programs not closely - * related to the kernel should not use this. - */ - data = shift_state; - ret = __put_user(data, p); - break; - case TIOCL_GETMOUSEREPORTING: - data = mouse_reporting(); - ret = __put_user(data, p); - break; - case TIOCL_SETVESABLANK: - ret = set_vesa_blanking(p); - break; - case TIOCL_GETKMSGREDIRECT: - data = vt_get_kmsg_redirect(); - ret = __put_user(data, p); - break; - case TIOCL_SETKMSGREDIRECT: - if (!capable(CAP_SYS_ADMIN)) { - ret = -EPERM; - } else { - if (get_user(data, p+1)) - ret = -EFAULT; - else - vt_kmsg_redirect(data); - } - break; - case TIOCL_GETFGCONSOLE: - ret = fg_console; - break; - case TIOCL_SCROLLCONSOLE: - if (get_user(lines, (s32 __user *)(p+4))) { - ret = -EFAULT; - } else { - scrollfront(vc_cons[fg_console].d, lines); - ret = 0; - } - break; - case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ - acquire_console_sem(); - ignore_poke = 1; - do_blank_screen(0); - release_console_sem(); - break; - case TIOCL_BLANKEDSCREEN: - ret = console_blanked; - break; - default: - ret = -EINVAL; - break; - } - return ret; -} - -/* - * /dev/ttyN handling - */ - -static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) -{ - int retval; - - retval = do_con_write(tty, buf, count); - con_flush_chars(tty); - - return retval; -} - -static int con_put_char(struct tty_struct *tty, unsigned char ch) -{ - if (in_interrupt()) - return 0; /* n_r3964 calls put_char() from interrupt context */ - return do_con_write(tty, &ch, 1); -} - -static int con_write_room(struct tty_struct *tty) -{ - if (tty->stopped) - return 0; - return 32768; /* No limit, really; we're not buffering */ -} - -static int con_chars_in_buffer(struct tty_struct *tty) -{ - return 0; /* we're not buffering */ -} - -/* - * con_throttle and con_unthrottle are only used for - * paste_selection(), which has to stuff in a large number of - * characters... - */ -static void con_throttle(struct tty_struct *tty) -{ -} - -static void con_unthrottle(struct tty_struct *tty) -{ - struct vc_data *vc = tty->driver_data; - - wake_up_interruptible(&vc->paste_wait); -} - -/* - * Turn the Scroll-Lock LED on when the tty is stopped - */ -static void con_stop(struct tty_struct *tty) -{ - int console_num; - if (!tty) - return; - console_num = tty->index; - if (!vc_cons_allocated(console_num)) - return; - set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); - set_leds(); -} - -/* - * Turn the Scroll-Lock LED off when the console is started - */ -static void con_start(struct tty_struct *tty) -{ - int console_num; - if (!tty) - return; - console_num = tty->index; - if (!vc_cons_allocated(console_num)) - return; - clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); - set_leds(); -} - -static void con_flush_chars(struct tty_struct *tty) -{ - struct vc_data *vc; - - if (in_interrupt()) /* from flush_to_ldisc */ - return; - - /* if we race with con_close(), vt may be null */ - acquire_console_sem(); - vc = tty->driver_data; - if (vc) - set_cursor(vc); - release_console_sem(); -} - -/* - * Allocate the console screen memory. - */ -static int con_open(struct tty_struct *tty, struct file *filp) -{ - unsigned int currcons = tty->index; - int ret = 0; - - acquire_console_sem(); - if (tty->driver_data == NULL) { - ret = vc_allocate(currcons); - if (ret == 0) { - struct vc_data *vc = vc_cons[currcons].d; - - /* Still being freed */ - if (vc->port.tty) { - release_console_sem(); - return -ERESTARTSYS; - } - tty->driver_data = vc; - vc->port.tty = tty; - - if (!tty->winsize.ws_row && !tty->winsize.ws_col) { - tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; - tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; - } - if (vc->vc_utf) - tty->termios->c_iflag |= IUTF8; - else - tty->termios->c_iflag &= ~IUTF8; - release_console_sem(); - return ret; - } - } - release_console_sem(); - return ret; -} - -static void con_close(struct tty_struct *tty, struct file *filp) -{ - /* Nothing to do - we defer to shutdown */ -} - -static void con_shutdown(struct tty_struct *tty) -{ - struct vc_data *vc = tty->driver_data; - BUG_ON(vc == NULL); - acquire_console_sem(); - vc->port.tty = NULL; - release_console_sem(); - tty_shutdown(tty); -} - -static int default_italic_color = 2; // green (ASCII) -static int default_underline_color = 3; // cyan (ASCII) -module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); -module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); - -static void vc_init(struct vc_data *vc, unsigned int rows, - unsigned int cols, int do_clear) -{ - int j, k ; - - vc->vc_cols = cols; - vc->vc_rows = rows; - vc->vc_size_row = cols << 1; - vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; - - set_origin(vc); - vc->vc_pos = vc->vc_origin; - reset_vc(vc); - for (j=k=0; j<16; j++) { - vc->vc_palette[k++] = default_red[j] ; - vc->vc_palette[k++] = default_grn[j] ; - vc->vc_palette[k++] = default_blu[j] ; - } - vc->vc_def_color = 0x07; /* white */ - vc->vc_ulcolor = default_underline_color; - vc->vc_itcolor = default_italic_color; - vc->vc_halfcolor = 0x08; /* grey */ - init_waitqueue_head(&vc->paste_wait); - reset_terminal(vc, do_clear); -} - -/* - * This routine initializes console interrupts, and does nothing - * else. If you want the screen to clear, call tty_write with - * the appropriate escape-sequence. - */ - -static int __init con_init(void) -{ - const char *display_desc = NULL; - struct vc_data *vc; - unsigned int currcons = 0, i; - - acquire_console_sem(); - - if (conswitchp) - display_desc = conswitchp->con_startup(); - if (!display_desc) { - fg_console = 0; - release_console_sem(); - return 0; - } - - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - struct con_driver *con_driver = ®istered_con_driver[i]; - - if (con_driver->con == NULL) { - con_driver->con = conswitchp; - con_driver->desc = display_desc; - con_driver->flag = CON_DRIVER_FLAG_INIT; - con_driver->first = 0; - con_driver->last = MAX_NR_CONSOLES - 1; - break; - } - } - - for (i = 0; i < MAX_NR_CONSOLES; i++) - con_driver_map[i] = conswitchp; - - if (blankinterval) { - blank_state = blank_normal_wait; - mod_timer(&console_timer, jiffies + (blankinterval * HZ)); - } - - for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { - vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); - INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); - tty_port_init(&vc->port); - visual_init(vc, currcons, 1); - vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); - vc_init(vc, vc->vc_rows, vc->vc_cols, - currcons || !vc->vc_sw->con_save_screen); - } - currcons = fg_console = 0; - master_display_fg = vc = vc_cons[currcons].d; - set_origin(vc); - save_screen(vc); - gotoxy(vc, vc->vc_x, vc->vc_y); - csi_J(vc, 0); - update_screen(vc); - printk("Console: %s %s %dx%d", - vc->vc_can_do_color ? "colour" : "mono", - display_desc, vc->vc_cols, vc->vc_rows); - printable = 1; - printk("\n"); - - release_console_sem(); - -#ifdef CONFIG_VT_CONSOLE - register_console(&vt_console_driver); -#endif - return 0; -} -console_initcall(con_init); - -static const struct tty_operations con_ops = { - .open = con_open, - .close = con_close, - .write = con_write, - .write_room = con_write_room, - .put_char = con_put_char, - .flush_chars = con_flush_chars, - .chars_in_buffer = con_chars_in_buffer, - .ioctl = vt_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = vt_compat_ioctl, -#endif - .stop = con_stop, - .start = con_start, - .throttle = con_throttle, - .unthrottle = con_unthrottle, - .resize = vt_resize, - .shutdown = con_shutdown -}; - -static struct cdev vc0_cdev; - -int __init vty_init(const struct file_operations *console_fops) -{ - cdev_init(&vc0_cdev, console_fops); - if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || - register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) - panic("Couldn't register /dev/tty0 driver\n"); - device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); - - vcs_init(); - - console_driver = alloc_tty_driver(MAX_NR_CONSOLES); - if (!console_driver) - panic("Couldn't allocate console driver\n"); - console_driver->owner = THIS_MODULE; - console_driver->name = "tty"; - console_driver->name_base = 1; - console_driver->major = TTY_MAJOR; - console_driver->minor_start = 1; - console_driver->type = TTY_DRIVER_TYPE_CONSOLE; - console_driver->init_termios = tty_std_termios; - if (default_utf8) - console_driver->init_termios.c_iflag |= IUTF8; - console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; - tty_set_operations(console_driver, &con_ops); - if (tty_register_driver(console_driver)) - panic("Couldn't register console driver\n"); - kbd_init(); - console_map_init(); -#ifdef CONFIG_MDA_CONSOLE - mda_console_init(); -#endif - return 0; -} - -#ifndef VT_SINGLE_DRIVER - -static struct class *vtconsole_class; - -static int bind_con_driver(const struct consw *csw, int first, int last, - int deflt) -{ - struct module *owner = csw->owner; - const char *desc = NULL; - struct con_driver *con_driver; - int i, j = -1, k = -1, retval = -ENODEV; - - if (!try_module_get(owner)) - return -ENODEV; - - acquire_console_sem(); - - /* check if driver is registered */ - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - con_driver = ®istered_con_driver[i]; - - if (con_driver->con == csw) { - desc = con_driver->desc; - retval = 0; - break; - } - } - - if (retval) - goto err; - - if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { - csw->con_startup(); - con_driver->flag |= CON_DRIVER_FLAG_INIT; - } - - if (deflt) { - if (conswitchp) - module_put(conswitchp->owner); - - __module_get(owner); - conswitchp = csw; - } - - first = max(first, con_driver->first); - last = min(last, con_driver->last); - - for (i = first; i <= last; i++) { - int old_was_color; - struct vc_data *vc = vc_cons[i].d; - - if (con_driver_map[i]) - module_put(con_driver_map[i]->owner); - __module_get(owner); - con_driver_map[i] = csw; - - if (!vc || !vc->vc_sw) - continue; - - j = i; - - if (CON_IS_VISIBLE(vc)) { - k = i; - save_screen(vc); - } - - old_was_color = vc->vc_can_do_color; - vc->vc_sw->con_deinit(vc); - vc->vc_origin = (unsigned long)vc->vc_screenbuf; - visual_init(vc, i, 0); - set_origin(vc); - update_attr(vc); - - /* If the console changed between mono <-> color, then - * the attributes in the screenbuf will be wrong. The - * following resets all attributes to something sane. - */ - if (old_was_color != vc->vc_can_do_color) - clear_buffer_attributes(vc); - } - - printk("Console: switching "); - if (!deflt) - printk("consoles %d-%d ", first+1, last+1); - if (j >= 0) { - struct vc_data *vc = vc_cons[j].d; - - printk("to %s %s %dx%d\n", - vc->vc_can_do_color ? "colour" : "mono", - desc, vc->vc_cols, vc->vc_rows); - - if (k >= 0) { - vc = vc_cons[k].d; - update_screen(vc); - } - } else - printk("to %s\n", desc); - - retval = 0; -err: - release_console_sem(); - module_put(owner); - return retval; -}; - -#ifdef CONFIG_VT_HW_CONSOLE_BINDING -static int con_is_graphics(const struct consw *csw, int first, int last) -{ - int i, retval = 0; - - for (i = first; i <= last; i++) { - struct vc_data *vc = vc_cons[i].d; - - if (vc && vc->vc_mode == KD_GRAPHICS) { - retval = 1; - break; - } - } - - return retval; -} - -/** - * unbind_con_driver - unbind a console driver - * @csw: pointer to console driver to unregister - * @first: first in range of consoles that @csw should be unbound from - * @last: last in range of consoles that @csw should be unbound from - * @deflt: should next bound console driver be default after @csw is unbound? - * - * To unbind a driver from all possible consoles, pass 0 as @first and - * %MAX_NR_CONSOLES as @last. - * - * @deflt controls whether the console that ends up replacing @csw should be - * the default console. - * - * RETURNS: - * -ENODEV if @csw isn't a registered console driver or can't be unregistered - * or 0 on success. - */ -int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) -{ - struct module *owner = csw->owner; - const struct consw *defcsw = NULL; - struct con_driver *con_driver = NULL, *con_back = NULL; - int i, retval = -ENODEV; - - if (!try_module_get(owner)) - return -ENODEV; - - acquire_console_sem(); - - /* check if driver is registered and if it is unbindable */ - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - con_driver = ®istered_con_driver[i]; - - if (con_driver->con == csw && - con_driver->flag & CON_DRIVER_FLAG_MODULE) { - retval = 0; - break; - } - } - - if (retval) { - release_console_sem(); - goto err; - } - - retval = -ENODEV; - - /* check if backup driver exists */ - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - con_back = ®istered_con_driver[i]; - - if (con_back->con && - !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { - defcsw = con_back->con; - retval = 0; - break; - } - } - - if (retval) { - release_console_sem(); - goto err; - } - - if (!con_is_bound(csw)) { - release_console_sem(); - goto err; - } - - first = max(first, con_driver->first); - last = min(last, con_driver->last); - - for (i = first; i <= last; i++) { - if (con_driver_map[i] == csw) { - module_put(csw->owner); - con_driver_map[i] = NULL; - } - } - - if (!con_is_bound(defcsw)) { - const struct consw *defconsw = conswitchp; - - defcsw->con_startup(); - con_back->flag |= CON_DRIVER_FLAG_INIT; - /* - * vgacon may change the default driver to point - * to dummycon, we restore it here... - */ - conswitchp = defconsw; - } - - if (!con_is_bound(csw)) - con_driver->flag &= ~CON_DRIVER_FLAG_INIT; - - release_console_sem(); - /* ignore return value, binding should not fail */ - bind_con_driver(defcsw, first, last, deflt); -err: - module_put(owner); - return retval; - -} -EXPORT_SYMBOL(unbind_con_driver); - -static int vt_bind(struct con_driver *con) -{ - const struct consw *defcsw = NULL, *csw = NULL; - int i, more = 1, first = -1, last = -1, deflt = 0; - - if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || - con_is_graphics(con->con, con->first, con->last)) - goto err; - - csw = con->con; - - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - struct con_driver *con = ®istered_con_driver[i]; - - if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { - defcsw = con->con; - break; - } - } - - if (!defcsw) - goto err; - - while (more) { - more = 0; - - for (i = con->first; i <= con->last; i++) { - if (con_driver_map[i] == defcsw) { - if (first == -1) - first = i; - last = i; - more = 1; - } else if (first != -1) - break; - } - - if (first == 0 && last == MAX_NR_CONSOLES -1) - deflt = 1; - - if (first != -1) - bind_con_driver(csw, first, last, deflt); - - first = -1; - last = -1; - deflt = 0; - } - -err: - return 0; -} - -static int vt_unbind(struct con_driver *con) -{ - const struct consw *csw = NULL; - int i, more = 1, first = -1, last = -1, deflt = 0; - - if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || - con_is_graphics(con->con, con->first, con->last)) - goto err; - - csw = con->con; - - while (more) { - more = 0; - - for (i = con->first; i <= con->last; i++) { - if (con_driver_map[i] == csw) { - if (first == -1) - first = i; - last = i; - more = 1; - } else if (first != -1) - break; - } - - if (first == 0 && last == MAX_NR_CONSOLES -1) - deflt = 1; - - if (first != -1) - unbind_con_driver(csw, first, last, deflt); - - first = -1; - last = -1; - deflt = 0; - } - -err: - return 0; -} -#else -static inline int vt_bind(struct con_driver *con) -{ - return 0; -} -static inline int vt_unbind(struct con_driver *con) -{ - return 0; -} -#endif /* CONFIG_VT_HW_CONSOLE_BINDING */ - -static ssize_t store_bind(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct con_driver *con = dev_get_drvdata(dev); - int bind = simple_strtoul(buf, NULL, 0); - - if (bind) - vt_bind(con); - else - vt_unbind(con); - - return count; -} - -static ssize_t show_bind(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct con_driver *con = dev_get_drvdata(dev); - int bind = con_is_bound(con->con); - - return snprintf(buf, PAGE_SIZE, "%i\n", bind); -} - -static ssize_t show_name(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct con_driver *con = dev_get_drvdata(dev); - - return snprintf(buf, PAGE_SIZE, "%s %s\n", - (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", - con->desc); - -} - -static struct device_attribute device_attrs[] = { - __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), - __ATTR(name, S_IRUGO, show_name, NULL), -}; - -static int vtconsole_init_device(struct con_driver *con) -{ - int i; - int error = 0; - - con->flag |= CON_DRIVER_FLAG_ATTR; - dev_set_drvdata(con->dev, con); - for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { - error = device_create_file(con->dev, &device_attrs[i]); - if (error) - break; - } - - if (error) { - while (--i >= 0) - device_remove_file(con->dev, &device_attrs[i]); - con->flag &= ~CON_DRIVER_FLAG_ATTR; - } - - return error; -} - -static void vtconsole_deinit_device(struct con_driver *con) -{ - int i; - - if (con->flag & CON_DRIVER_FLAG_ATTR) { - for (i = 0; i < ARRAY_SIZE(device_attrs); i++) - device_remove_file(con->dev, &device_attrs[i]); - con->flag &= ~CON_DRIVER_FLAG_ATTR; - } -} - -/** - * con_is_bound - checks if driver is bound to the console - * @csw: console driver - * - * RETURNS: zero if unbound, nonzero if bound - * - * Drivers can call this and if zero, they should release - * all resources allocated on con_startup() - */ -int con_is_bound(const struct consw *csw) -{ - int i, bound = 0; - - for (i = 0; i < MAX_NR_CONSOLES; i++) { - if (con_driver_map[i] == csw) { - bound = 1; - break; - } - } - - return bound; -} -EXPORT_SYMBOL(con_is_bound); - -/** - * con_debug_enter - prepare the console for the kernel debugger - * @sw: console driver - * - * Called when the console is taken over by the kernel debugger, this - * function needs to save the current console state, then put the console - * into a state suitable for the kernel debugger. - * - * RETURNS: - * Zero on success, nonzero if a failure occurred when trying to prepare - * the console for the debugger. - */ -int con_debug_enter(struct vc_data *vc) -{ - int ret = 0; - - saved_fg_console = fg_console; - saved_last_console = last_console; - saved_want_console = want_console; - saved_vc_mode = vc->vc_mode; - saved_console_blanked = console_blanked; - vc->vc_mode = KD_TEXT; - console_blanked = 0; - if (vc->vc_sw->con_debug_enter) - ret = vc->vc_sw->con_debug_enter(vc); -#ifdef CONFIG_KGDB_KDB - /* Set the initial LINES variable if it is not already set */ - if (vc->vc_rows < 999) { - int linecount; - char lns[4]; - const char *setargs[3] = { - "set", - "LINES", - lns, - }; - if (kdbgetintenv(setargs[0], &linecount)) { - snprintf(lns, 4, "%i", vc->vc_rows); - kdb_set(2, setargs); - } - } -#endif /* CONFIG_KGDB_KDB */ - return ret; -} -EXPORT_SYMBOL_GPL(con_debug_enter); - -/** - * con_debug_leave - restore console state - * @sw: console driver - * - * Restore the console state to what it was before the kernel debugger - * was invoked. - * - * RETURNS: - * Zero on success, nonzero if a failure occurred when trying to restore - * the console. - */ -int con_debug_leave(void) -{ - struct vc_data *vc; - int ret = 0; - - fg_console = saved_fg_console; - last_console = saved_last_console; - want_console = saved_want_console; - console_blanked = saved_console_blanked; - vc_cons[fg_console].d->vc_mode = saved_vc_mode; - - vc = vc_cons[fg_console].d; - if (vc->vc_sw->con_debug_leave) - ret = vc->vc_sw->con_debug_leave(vc); - return ret; -} -EXPORT_SYMBOL_GPL(con_debug_leave); - -/** - * register_con_driver - register console driver to console layer - * @csw: console driver - * @first: the first console to take over, minimum value is 0 - * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 - * - * DESCRIPTION: This function registers a console driver which can later - * bind to a range of consoles specified by @first and @last. It will - * also initialize the console driver by calling con_startup(). - */ -int register_con_driver(const struct consw *csw, int first, int last) -{ - struct module *owner = csw->owner; - struct con_driver *con_driver; - const char *desc; - int i, retval = 0; - - if (!try_module_get(owner)) - return -ENODEV; - - acquire_console_sem(); - - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - con_driver = ®istered_con_driver[i]; - - /* already registered */ - if (con_driver->con == csw) - retval = -EINVAL; - } - - if (retval) - goto err; - - desc = csw->con_startup(); - - if (!desc) - goto err; - - retval = -EINVAL; - - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - con_driver = ®istered_con_driver[i]; - - if (con_driver->con == NULL) { - con_driver->con = csw; - con_driver->desc = desc; - con_driver->node = i; - con_driver->flag = CON_DRIVER_FLAG_MODULE | - CON_DRIVER_FLAG_INIT; - con_driver->first = first; - con_driver->last = last; - retval = 0; - break; - } - } - - if (retval) - goto err; - - con_driver->dev = device_create(vtconsole_class, NULL, - MKDEV(0, con_driver->node), - NULL, "vtcon%i", - con_driver->node); - - if (IS_ERR(con_driver->dev)) { - printk(KERN_WARNING "Unable to create device for %s; " - "errno = %ld\n", con_driver->desc, - PTR_ERR(con_driver->dev)); - con_driver->dev = NULL; - } else { - vtconsole_init_device(con_driver); - } - -err: - release_console_sem(); - module_put(owner); - return retval; -} -EXPORT_SYMBOL(register_con_driver); - -/** - * unregister_con_driver - unregister console driver from console layer - * @csw: console driver - * - * DESCRIPTION: All drivers that registers to the console layer must - * call this function upon exit, or if the console driver is in a state - * where it won't be able to handle console services, such as the - * framebuffer console without loaded framebuffer drivers. - * - * The driver must unbind first prior to unregistration. - */ -int unregister_con_driver(const struct consw *csw) -{ - int i, retval = -ENODEV; - - acquire_console_sem(); - - /* cannot unregister a bound driver */ - if (con_is_bound(csw)) - goto err; - - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - struct con_driver *con_driver = ®istered_con_driver[i]; - - if (con_driver->con == csw && - con_driver->flag & CON_DRIVER_FLAG_MODULE) { - vtconsole_deinit_device(con_driver); - device_destroy(vtconsole_class, - MKDEV(0, con_driver->node)); - con_driver->con = NULL; - con_driver->desc = NULL; - con_driver->dev = NULL; - con_driver->node = 0; - con_driver->flag = 0; - con_driver->first = 0; - con_driver->last = 0; - retval = 0; - break; - } - } -err: - release_console_sem(); - return retval; -} -EXPORT_SYMBOL(unregister_con_driver); - -/* - * If we support more console drivers, this function is used - * when a driver wants to take over some existing consoles - * and become default driver for newly opened ones. - * - * take_over_console is basically a register followed by unbind - */ -int take_over_console(const struct consw *csw, int first, int last, int deflt) -{ - int err; - - err = register_con_driver(csw, first, last); - - if (!err) - bind_con_driver(csw, first, last, deflt); - - return err; -} - -/* - * give_up_console is a wrapper to unregister_con_driver. It will only - * work if driver is fully unbound. - */ -void give_up_console(const struct consw *csw) -{ - unregister_con_driver(csw); -} - -static int __init vtconsole_class_init(void) -{ - int i; - - vtconsole_class = class_create(THIS_MODULE, "vtconsole"); - if (IS_ERR(vtconsole_class)) { - printk(KERN_WARNING "Unable to create vt console class; " - "errno = %ld\n", PTR_ERR(vtconsole_class)); - vtconsole_class = NULL; - } - - /* Add system drivers to sysfs */ - for (i = 0; i < MAX_NR_CON_DRIVER; i++) { - struct con_driver *con = ®istered_con_driver[i]; - - if (con->con && !con->dev) { - con->dev = device_create(vtconsole_class, NULL, - MKDEV(0, con->node), - NULL, "vtcon%i", - con->node); - - if (IS_ERR(con->dev)) { - printk(KERN_WARNING "Unable to create " - "device for %s; errno = %ld\n", - con->desc, PTR_ERR(con->dev)); - con->dev = NULL; - } else { - vtconsole_init_device(con); - } - } - } - - return 0; -} -postcore_initcall(vtconsole_class_init); - -#endif - -/* - * Screen blanking - */ - -static int set_vesa_blanking(char __user *p) -{ - unsigned int mode; - - if (get_user(mode, p + 1)) - return -EFAULT; - - vesa_blank_mode = (mode < 4) ? mode : 0; - return 0; -} - -void do_blank_screen(int entering_gfx) -{ - struct vc_data *vc = vc_cons[fg_console].d; - int i; - - WARN_CONSOLE_UNLOCKED(); - - if (console_blanked) { - if (blank_state == blank_vesa_wait) { - blank_state = blank_off; - vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); - } - return; - } - - /* entering graphics mode? */ - if (entering_gfx) { - hide_cursor(vc); - save_screen(vc); - vc->vc_sw->con_blank(vc, -1, 1); - console_blanked = fg_console + 1; - blank_state = blank_off; - set_origin(vc); - return; - } - - if (blank_state != blank_normal_wait) - return; - blank_state = blank_off; - - /* don't blank graphics */ - if (vc->vc_mode != KD_TEXT) { - console_blanked = fg_console + 1; - return; - } - - hide_cursor(vc); - del_timer_sync(&console_timer); - blank_timer_expired = 0; - - save_screen(vc); - /* In case we need to reset origin, blanking hook returns 1 */ - i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); - console_blanked = fg_console + 1; - if (i) - set_origin(vc); - - if (console_blank_hook && console_blank_hook(1)) - return; - - if (vesa_off_interval && vesa_blank_mode) { - blank_state = blank_vesa_wait; - mod_timer(&console_timer, jiffies + vesa_off_interval); - } - vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); -} -EXPORT_SYMBOL(do_blank_screen); - -/* - * Called by timer as well as from vt_console_driver - */ -void do_unblank_screen(int leaving_gfx) -{ - struct vc_data *vc; - - /* This should now always be called from a "sane" (read: can schedule) - * context for the sake of the low level drivers, except in the special - * case of oops_in_progress - */ - if (!oops_in_progress) - might_sleep(); - - WARN_CONSOLE_UNLOCKED(); - - ignore_poke = 0; - if (!console_blanked) - return; - if (!vc_cons_allocated(fg_console)) { - /* impossible */ - printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); - return; - } - vc = vc_cons[fg_console].d; - /* Try to unblank in oops case too */ - if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) - return; /* but leave console_blanked != 0 */ - - if (blankinterval) { - mod_timer(&console_timer, jiffies + (blankinterval * HZ)); - blank_state = blank_normal_wait; - } - - console_blanked = 0; - if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) - /* Low-level driver cannot restore -> do it ourselves */ - update_screen(vc); - if (console_blank_hook) - console_blank_hook(0); - set_palette(vc); - set_cursor(vc); - vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); -} -EXPORT_SYMBOL(do_unblank_screen); - -/* - * This is called by the outside world to cause a forced unblank, mostly for - * oopses. Currently, I just call do_unblank_screen(0), but we could eventually - * call it with 1 as an argument and so force a mode restore... that may kill - * X or at least garbage the screen but would also make the Oops visible... - */ -void unblank_screen(void) -{ - do_unblank_screen(0); -} - -/* - * We defer the timer blanking to work queue so it can take the console mutex - * (console operations can still happen at irq time, but only from printk which - * has the console mutex. Not perfect yet, but better than no locking - */ -static void blank_screen_t(unsigned long dummy) -{ - if (unlikely(!keventd_up())) { - mod_timer(&console_timer, jiffies + (blankinterval * HZ)); - return; - } - blank_timer_expired = 1; - schedule_work(&console_work); -} - -void poke_blanked_console(void) -{ - WARN_CONSOLE_UNLOCKED(); - - /* Add this so we quickly catch whoever might call us in a non - * safe context. Nowadays, unblank_screen() isn't to be called in - * atomic contexts and is allowed to schedule (with the special case - * of oops_in_progress, but that isn't of any concern for this - * function. --BenH. - */ - might_sleep(); - - /* This isn't perfectly race free, but a race here would be mostly harmless, - * at worse, we'll do a spurrious blank and it's unlikely - */ - del_timer(&console_timer); - blank_timer_expired = 0; - - if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) - return; - if (console_blanked) - unblank_screen(); - else if (blankinterval) { - mod_timer(&console_timer, jiffies + (blankinterval * HZ)); - blank_state = blank_normal_wait; - } -} - -/* - * Palettes - */ - -static void set_palette(struct vc_data *vc) -{ - WARN_CONSOLE_UNLOCKED(); - - if (vc->vc_mode != KD_GRAPHICS) - vc->vc_sw->con_set_palette(vc, color_table); -} - -static int set_get_cmap(unsigned char __user *arg, int set) -{ - int i, j, k; - - WARN_CONSOLE_UNLOCKED(); - - for (i = 0; i < 16; i++) - if (set) { - get_user(default_red[i], arg++); - get_user(default_grn[i], arg++); - get_user(default_blu[i], arg++); - } else { - put_user(default_red[i], arg++); - put_user(default_grn[i], arg++); - put_user(default_blu[i], arg++); - } - if (set) { - for (i = 0; i < MAX_NR_CONSOLES; i++) - if (vc_cons_allocated(i)) { - for (j = k = 0; j < 16; j++) { - vc_cons[i].d->vc_palette[k++] = default_red[j]; - vc_cons[i].d->vc_palette[k++] = default_grn[j]; - vc_cons[i].d->vc_palette[k++] = default_blu[j]; - } - set_palette(vc_cons[i].d); - } - } - return 0; -} - -/* - * Load palette into the DAC registers. arg points to a colour - * map, 3 bytes per colour, 16 colours, range from 0 to 255. - */ - -int con_set_cmap(unsigned char __user *arg) -{ - int rc; - - acquire_console_sem(); - rc = set_get_cmap (arg,1); - release_console_sem(); - - return rc; -} - -int con_get_cmap(unsigned char __user *arg) -{ - int rc; - - acquire_console_sem(); - rc = set_get_cmap (arg,0); - release_console_sem(); - - return rc; -} - -void reset_palette(struct vc_data *vc) -{ - int j, k; - for (j=k=0; j<16; j++) { - vc->vc_palette[k++] = default_red[j]; - vc->vc_palette[k++] = default_grn[j]; - vc->vc_palette[k++] = default_blu[j]; - } - set_palette(vc); -} - -/* - * Font switching - * - * Currently we only support fonts up to 32 pixels wide, at a maximum height - * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, - * depending on width) reserved for each character which is kinda wasty, but - * this is done in order to maintain compatibility with the EGA/VGA fonts. It - * is upto the actual low-level console-driver convert data into its favorite - * format (maybe we should add a `fontoffset' field to the `display' - * structure so we won't have to convert the fontdata all the time. - * /Jes - */ - -#define max_font_size 65536 - -static int con_font_get(struct vc_data *vc, struct console_font_op *op) -{ - struct console_font font; - int rc = -EINVAL; - int c; - - if (vc->vc_mode != KD_TEXT) - return -EINVAL; - - if (op->data) { - font.data = kmalloc(max_font_size, GFP_KERNEL); - if (!font.data) - return -ENOMEM; - } else - font.data = NULL; - - acquire_console_sem(); - if (vc->vc_sw->con_font_get) - rc = vc->vc_sw->con_font_get(vc, &font); - else - rc = -ENOSYS; - release_console_sem(); - - if (rc) - goto out; - - c = (font.width+7)/8 * 32 * font.charcount; - - if (op->data && font.charcount > op->charcount) - rc = -ENOSPC; - if (!(op->flags & KD_FONT_FLAG_OLD)) { - if (font.width > op->width || font.height > op->height) - rc = -ENOSPC; - } else { - if (font.width != 8) - rc = -EIO; - else if ((op->height && font.height > op->height) || - font.height > 32) - rc = -ENOSPC; - } - if (rc) - goto out; - - op->height = font.height; - op->width = font.width; - op->charcount = font.charcount; - - if (op->data && copy_to_user(op->data, font.data, c)) - rc = -EFAULT; - -out: - kfree(font.data); - return rc; -} - -static int con_font_set(struct vc_data *vc, struct console_font_op *op) -{ - struct console_font font; - int rc = -EINVAL; - int size; - - if (vc->vc_mode != KD_TEXT) - return -EINVAL; - if (!op->data) - return -EINVAL; - if (op->charcount > 512) - return -EINVAL; - if (!op->height) { /* Need to guess font height [compat] */ - int h, i; - u8 __user *charmap = op->data; - u8 tmp; - - /* If from KDFONTOP ioctl, don't allow things which can be done in userland, - so that we can get rid of this soon */ - if (!(op->flags & KD_FONT_FLAG_OLD)) - return -EINVAL; - for (h = 32; h > 0; h--) - for (i = 0; i < op->charcount; i++) { - if (get_user(tmp, &charmap[32*i+h-1])) - return -EFAULT; - if (tmp) - goto nonzero; - } - return -EINVAL; - nonzero: - op->height = h; - } - if (op->width <= 0 || op->width > 32 || op->height > 32) - return -EINVAL; - size = (op->width+7)/8 * 32 * op->charcount; - if (size > max_font_size) - return -ENOSPC; - font.charcount = op->charcount; - font.height = op->height; - font.width = op->width; - font.data = memdup_user(op->data, size); - if (IS_ERR(font.data)) - return PTR_ERR(font.data); - acquire_console_sem(); - if (vc->vc_sw->con_font_set) - rc = vc->vc_sw->con_font_set(vc, &font, op->flags); - else - rc = -ENOSYS; - release_console_sem(); - kfree(font.data); - return rc; -} - -static int con_font_default(struct vc_data *vc, struct console_font_op *op) -{ - struct console_font font = {.width = op->width, .height = op->height}; - char name[MAX_FONT_NAME]; - char *s = name; - int rc; - - if (vc->vc_mode != KD_TEXT) - return -EINVAL; - - if (!op->data) - s = NULL; - else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) - return -EFAULT; - else - name[MAX_FONT_NAME - 1] = 0; - - acquire_console_sem(); - if (vc->vc_sw->con_font_default) - rc = vc->vc_sw->con_font_default(vc, &font, s); - else - rc = -ENOSYS; - release_console_sem(); - if (!rc) { - op->width = font.width; - op->height = font.height; - } - return rc; -} - -static int con_font_copy(struct vc_data *vc, struct console_font_op *op) -{ - int con = op->height; - int rc; - - if (vc->vc_mode != KD_TEXT) - return -EINVAL; - - acquire_console_sem(); - if (!vc->vc_sw->con_font_copy) - rc = -ENOSYS; - else if (con < 0 || !vc_cons_allocated(con)) - rc = -ENOTTY; - else if (con == vc->vc_num) /* nothing to do */ - rc = 0; - else - rc = vc->vc_sw->con_font_copy(vc, con); - release_console_sem(); - return rc; -} - -int con_font_op(struct vc_data *vc, struct console_font_op *op) -{ - switch (op->op) { - case KD_FONT_OP_SET: - return con_font_set(vc, op); - case KD_FONT_OP_GET: - return con_font_get(vc, op); - case KD_FONT_OP_SET_DEFAULT: - return con_font_default(vc, op); - case KD_FONT_OP_COPY: - return con_font_copy(vc, op); - } - return -ENOSYS; -} - -/* - * Interface exported to selection and vcs. - */ - -/* used by selection */ -u16 screen_glyph(struct vc_data *vc, int offset) -{ - u16 w = scr_readw(screenpos(vc, offset, 1)); - u16 c = w & 0xff; - - if (w & vc->vc_hi_font_mask) - c |= 0x100; - return c; -} -EXPORT_SYMBOL_GPL(screen_glyph); - -/* used by vcs - note the word offset */ -unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) -{ - return screenpos(vc, 2 * w_offset, viewed); -} - -void getconsxy(struct vc_data *vc, unsigned char *p) -{ - p[0] = vc->vc_x; - p[1] = vc->vc_y; -} - -void putconsxy(struct vc_data *vc, unsigned char *p) -{ - hide_cursor(vc); - gotoxy(vc, p[0], p[1]); - set_cursor(vc); -} - -u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) -{ - if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) - return softcursor_original; - return scr_readw(org); -} - -void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) -{ - scr_writew(val, org); - if ((unsigned long)org == vc->vc_pos) { - softcursor_original = -1; - add_softcursor(vc); - } -} - -void vcs_scr_updated(struct vc_data *vc) -{ - notify_update(vc); -} - -/* - * Visible symbols for modules - */ - -EXPORT_SYMBOL(color_table); -EXPORT_SYMBOL(default_red); -EXPORT_SYMBOL(default_grn); -EXPORT_SYMBOL(default_blu); -EXPORT_SYMBOL(update_region); -EXPORT_SYMBOL(redraw_screen); -EXPORT_SYMBOL(vc_resize); -EXPORT_SYMBOL(fg_console); -EXPORT_SYMBOL(console_blank_hook); -EXPORT_SYMBOL(console_blanked); -EXPORT_SYMBOL(vc_cons); -EXPORT_SYMBOL(global_cursor_default); -#ifndef VT_SINGLE_DRIVER -EXPORT_SYMBOL(take_over_console); -EXPORT_SYMBOL(give_up_console); -#endif |