/* * 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, * * * Rudimentary ISO 10646/Unicode/UTF-8 character set support by * Markus Kuhn, . * * 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 * * * User-defined bell sound, new setterm control sequences and printk * redirection by Martin Mares 19-Nov-95 * * APM screenblank bug fixed Takashi Manabe * * Merge with the abstract console driver by Geert Uytterhoeven * , Jan 1997. * * Original m68k console driver modifications by * * - Arno Griffioen * - David Carter * * 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 for more information). * * Support for changeable cursor shape * by Pavel Machek , August 1997 * * Ported to i386 and con_scrolldelta fixed * by Emmanuel Marty , April 1998 * * Resurrected character buffers in videoram plus lots of other trickery * by Martin Mares , 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 , Aug 2006 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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-