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4816 lines
113 KiB
4816 lines
113 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 1991, 1992 Linus Torvalds |
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*/ |
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|
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/* |
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* Hopefully this will be a rather complete VT102 implementation. |
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* |
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* Beeping thanks to John T Kohl. |
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* |
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* Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics |
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* Chars, and VT100 enhancements by Peter MacDonald. |
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* |
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* Copy and paste function by Andrew Haylett, |
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* some enhancements by Alessandro Rubini. |
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* |
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* Code to check for different video-cards mostly by Galen Hunt, |
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* <[email protected]> |
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* |
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* Rudimentary ISO 10646/Unicode/UTF-8 character set support by |
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* Markus Kuhn, <[email protected]>. |
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* |
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* Dynamic allocation of consoles, [email protected], May 1994 |
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* Resizing of consoles, aeb, 940926 |
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* |
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* Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 |
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* <[email protected]> |
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* |
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* User-defined bell sound, new setterm control sequences and printk |
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* redirection by Martin Mares <[email protected]> 19-Nov-95 |
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* |
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* APM screenblank bug fixed Takashi Manabe <[email protected]> |
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* |
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* Merge with the abstract console driver by Geert Uytterhoeven |
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* <[email protected]>, Jan 1997. |
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* |
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* Original m68k console driver modifications by |
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* |
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* - Arno Griffioen <[email protected]> |
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* - David Carter <[email protected]> |
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* |
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* The abstract console driver provides a generic interface for a text |
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* console. It supports VGA text mode, frame buffer based graphical consoles |
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* and special graphics processors that are only accessible through some |
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* registers (e.g. a TMS340x0 GSP). |
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* |
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* The interface to the hardware is specified using a special structure |
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* (struct consw) which contains function pointers to console operations |
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* (see <linux/console.h> for more information). |
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* |
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* Support for changeable cursor shape |
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* by Pavel Machek <[email protected]>, August 1997 |
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* |
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* Ported to i386 and con_scrolldelta fixed |
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* by Emmanuel Marty <[email protected]>, April 1998 |
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* |
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* Resurrected character buffers in videoram plus lots of other trickery |
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* by Martin Mares <[email protected]>, July 1998 |
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* |
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* Removed old-style timers, introduced console_timer, made timer |
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* deletion SMP-safe. 17Jun00, Andrew Morton |
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* |
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* Removed console_lock, enabled interrupts across all console operations |
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* 13 March 2001, Andrew Morton |
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* |
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* Fixed UTF-8 mode so alternate charset modes always work according |
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* to control sequences interpreted in do_con_trol function |
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* preserving backward VT100 semigraphics compatibility, |
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* malformed UTF sequences represented as sequences of replacement glyphs, |
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* original codes or '?' as a last resort if replacement glyph is undefined |
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* by Adam Tla/lka <[email protected]>, Aug 2006 |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/sched/signal.h> |
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#include <linux/tty.h> |
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#include <linux/tty_flip.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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#include <linux/errno.h> |
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#include <linux/kd.h> |
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#include <linux/slab.h> |
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#include <linux/vmalloc.h> |
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#include <linux/major.h> |
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#include <linux/mm.h> |
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#include <linux/console.h> |
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#include <linux/init.h> |
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#include <linux/mutex.h> |
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#include <linux/vt_kern.h> |
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#include <linux/selection.h> |
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#include <linux/tiocl.h> |
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#include <linux/kbd_kern.h> |
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#include <linux/consolemap.h> |
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#include <linux/timer.h> |
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#include <linux/interrupt.h> |
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#include <linux/workqueue.h> |
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#include <linux/pm.h> |
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#include <linux/font.h> |
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#include <linux/bitops.h> |
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#include <linux/notifier.h> |
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#include <linux/device.h> |
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#include <linux/io.h> |
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#include <linux/uaccess.h> |
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#include <linux/kdb.h> |
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#include <linux/ctype.h> |
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#include <linux/bsearch.h> |
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#include <linux/gcd.h> |
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#define MAX_NR_CON_DRIVER 16 |
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#define CON_DRIVER_FLAG_MODULE 1 |
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#define CON_DRIVER_FLAG_INIT 2 |
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#define CON_DRIVER_FLAG_ATTR 4 |
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#define CON_DRIVER_FLAG_ZOMBIE 8 |
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struct con_driver { |
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const struct consw *con; |
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const char *desc; |
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struct device *dev; |
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int node; |
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int first; |
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int last; |
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int flag; |
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}; |
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static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; |
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const struct consw *conswitchp; |
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|
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/* |
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* Here is the default bell parameters: 750HZ, 1/8th of a second |
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*/ |
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#define DEFAULT_BELL_PITCH 750 |
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#define DEFAULT_BELL_DURATION (HZ/8) |
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#define DEFAULT_CURSOR_BLINK_MS 200 |
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struct vc vc_cons [MAX_NR_CONSOLES]; |
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#ifndef VT_SINGLE_DRIVER |
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static const struct consw *con_driver_map[MAX_NR_CONSOLES]; |
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#endif |
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static int con_open(struct tty_struct *, struct file *); |
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static void vc_init(struct vc_data *vc, unsigned int rows, |
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unsigned int cols, int do_clear); |
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static void gotoxy(struct vc_data *vc, int new_x, int new_y); |
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static void save_cur(struct vc_data *vc); |
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static void reset_terminal(struct vc_data *vc, int do_clear); |
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static void con_flush_chars(struct tty_struct *tty); |
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static int set_vesa_blanking(char __user *p); |
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static void set_cursor(struct vc_data *vc); |
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static void hide_cursor(struct vc_data *vc); |
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static void console_callback(struct work_struct *ignored); |
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static void con_driver_unregister_callback(struct work_struct *ignored); |
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static void blank_screen_t(struct timer_list *unused); |
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static void set_palette(struct vc_data *vc); |
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#define vt_get_kmsg_redirect() vt_kmsg_redirect(-1) |
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static int printable; /* Is console ready for printing? */ |
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int default_utf8 = true; |
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module_param(default_utf8, int, S_IRUGO | S_IWUSR); |
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int global_cursor_default = -1; |
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module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); |
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static int cur_default = CUR_UNDERLINE; |
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module_param(cur_default, int, S_IRUGO | S_IWUSR); |
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/* |
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* ignore_poke: don't unblank the screen when things are typed. This is |
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* mainly for the privacy of braille terminal users. |
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*/ |
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static int ignore_poke; |
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int do_poke_blanked_console; |
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int console_blanked; |
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static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ |
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static int vesa_off_interval; |
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static int blankinterval; |
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core_param(consoleblank, blankinterval, int, 0444); |
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static DECLARE_WORK(console_work, console_callback); |
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static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback); |
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/* |
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* fg_console is the current virtual console, |
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* last_console is the last used one, |
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* want_console is the console we want to switch to, |
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* saved_* variants are for save/restore around kernel debugger enter/leave |
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*/ |
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int fg_console; |
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int last_console; |
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int want_console = -1; |
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static int saved_fg_console; |
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static int saved_last_console; |
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static int saved_want_console; |
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static int saved_vc_mode; |
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static int saved_console_blanked; |
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/* |
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* For each existing display, we have a pointer to console currently visible |
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* on that display, allowing consoles other than fg_console to be refreshed |
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* appropriately. Unless the low-level driver supplies its own display_fg |
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* variable, we use this one for the "master display". |
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*/ |
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static struct vc_data *master_display_fg; |
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/* |
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* Unfortunately, we need to delay tty echo when we're currently writing to the |
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* console since the code is (and always was) not re-entrant, so we schedule |
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* all flip requests to process context with schedule-task() and run it from |
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* console_callback(). |
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*/ |
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/* |
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* For the same reason, we defer scrollback to the console callback. |
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*/ |
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static int scrollback_delta; |
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/* |
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* Hook so that the power management routines can (un)blank |
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* the console on our behalf. |
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*/ |
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int (*console_blank_hook)(int); |
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static DEFINE_TIMER(console_timer, blank_screen_t); |
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static int blank_state; |
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static int blank_timer_expired; |
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enum { |
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blank_off = 0, |
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blank_normal_wait, |
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blank_vesa_wait, |
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}; |
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/* |
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* /sys/class/tty/tty0/ |
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* |
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* the attribute 'active' contains the name of the current vc |
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* console and it supports poll() to detect vc switches |
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*/ |
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static struct device *tty0dev; |
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/* |
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* Notifier list for console events. |
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*/ |
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static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); |
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int register_vt_notifier(struct notifier_block *nb) |
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{ |
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return atomic_notifier_chain_register(&vt_notifier_list, nb); |
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} |
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EXPORT_SYMBOL_GPL(register_vt_notifier); |
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int unregister_vt_notifier(struct notifier_block *nb) |
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{ |
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return atomic_notifier_chain_unregister(&vt_notifier_list, nb); |
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} |
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EXPORT_SYMBOL_GPL(unregister_vt_notifier); |
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static void notify_write(struct vc_data *vc, unsigned int unicode) |
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{ |
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struct vt_notifier_param param = { .vc = vc, .c = unicode }; |
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atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); |
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} |
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static void notify_update(struct vc_data *vc) |
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{ |
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struct vt_notifier_param param = { .vc = vc }; |
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atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); |
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} |
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/* |
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* Low-Level Functions |
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*/ |
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static inline bool con_is_fg(const struct vc_data *vc) |
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{ |
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return vc->vc_num == fg_console; |
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} |
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static inline bool con_should_update(const struct vc_data *vc) |
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{ |
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return con_is_visible(vc) && !console_blanked; |
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} |
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static inline unsigned short *screenpos(const struct vc_data *vc, int offset, |
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bool viewed) |
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{ |
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unsigned short *p; |
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if (!viewed) |
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p = (unsigned short *)(vc->vc_origin + offset); |
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else if (!vc->vc_sw->con_screen_pos) |
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p = (unsigned short *)(vc->vc_visible_origin + offset); |
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else |
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p = vc->vc_sw->con_screen_pos(vc, offset); |
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return p; |
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} |
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/* Called from the keyboard irq path.. */ |
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static inline void scrolldelta(int lines) |
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{ |
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/* FIXME */ |
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/* scrolldelta needs some kind of consistency lock, but the BKL was |
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and still is not protecting versus the scheduled back end */ |
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scrollback_delta += lines; |
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schedule_console_callback(); |
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} |
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void schedule_console_callback(void) |
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{ |
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schedule_work(&console_work); |
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} |
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/* |
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* Code to manage unicode-based screen buffers |
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*/ |
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#ifdef NO_VC_UNI_SCREEN |
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/* this disables and optimizes related code away at compile time */ |
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#define get_vc_uniscr(vc) NULL |
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#else |
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#define get_vc_uniscr(vc) vc->vc_uni_screen |
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#endif |
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#define VC_UNI_SCREEN_DEBUG 0 |
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typedef uint32_t char32_t; |
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/* |
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* Our screen buffer is preceded by an array of line pointers so that |
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* scrolling only implies some pointer shuffling. |
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*/ |
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struct uni_screen { |
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char32_t *lines[0]; |
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}; |
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static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) |
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{ |
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struct uni_screen *uniscr; |
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void *p; |
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unsigned int memsize, i; |
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/* allocate everything in one go */ |
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memsize = cols * rows * sizeof(char32_t); |
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memsize += rows * sizeof(char32_t *); |
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p = vmalloc(memsize); |
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if (!p) |
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return NULL; |
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/* initial line pointers */ |
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uniscr = p; |
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p = uniscr->lines + rows; |
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for (i = 0; i < rows; i++) { |
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uniscr->lines[i] = p; |
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p += cols * sizeof(char32_t); |
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} |
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return uniscr; |
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} |
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static void vc_uniscr_free(struct uni_screen *uniscr) |
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{ |
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vfree(uniscr); |
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} |
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static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr) |
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{ |
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vc_uniscr_free(vc->vc_uni_screen); |
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vc->vc_uni_screen = new_uniscr; |
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} |
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static void vc_uniscr_putc(struct vc_data *vc, char32_t uc) |
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{ |
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struct uni_screen *uniscr = get_vc_uniscr(vc); |
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if (uniscr) |
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uniscr->lines[vc->state.y][vc->state.x] = uc; |
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} |
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static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) |
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{ |
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struct uni_screen *uniscr = get_vc_uniscr(vc); |
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if (uniscr) { |
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char32_t *ln = uniscr->lines[vc->state.y]; |
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unsigned int x = vc->state.x, cols = vc->vc_cols; |
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memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln)); |
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memset32(&ln[x], ' ', nr); |
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} |
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} |
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static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) |
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{ |
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struct uni_screen *uniscr = get_vc_uniscr(vc); |
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if (uniscr) { |
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char32_t *ln = uniscr->lines[vc->state.y]; |
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unsigned int x = vc->state.x, cols = vc->vc_cols; |
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memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln)); |
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memset32(&ln[cols - nr], ' ', nr); |
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} |
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} |
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static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, |
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unsigned int nr) |
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{ |
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struct uni_screen *uniscr = get_vc_uniscr(vc); |
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if (uniscr) { |
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char32_t *ln = uniscr->lines[vc->state.y]; |
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memset32(&ln[x], ' ', nr); |
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} |
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} |
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static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, |
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unsigned int nr) |
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{ |
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struct uni_screen *uniscr = get_vc_uniscr(vc); |
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if (uniscr) { |
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unsigned int cols = vc->vc_cols; |
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while (nr--) |
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memset32(uniscr->lines[y++], ' ', cols); |
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} |
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} |
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static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, |
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enum con_scroll dir, unsigned int nr) |
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{ |
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struct uni_screen *uniscr = get_vc_uniscr(vc); |
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if (uniscr) { |
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unsigned int i, j, k, sz, d, clear; |
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sz = b - t; |
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clear = b - nr; |
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d = nr; |
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if (dir == SM_DOWN) { |
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clear = t; |
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d = sz - nr; |
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} |
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for (i = 0; i < gcd(d, sz); i++) { |
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char32_t *tmp = uniscr->lines[t + i]; |
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j = i; |
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while (1) { |
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k = j + d; |
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if (k >= sz) |
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k -= sz; |
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if (k == i) |
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break; |
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uniscr->lines[t + j] = uniscr->lines[t + k]; |
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j = k; |
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} |
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uniscr->lines[t + j] = tmp; |
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} |
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vc_uniscr_clear_lines(vc, clear, nr); |
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} |
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} |
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static void vc_uniscr_copy_area(struct uni_screen *dst, |
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unsigned int dst_cols, |
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unsigned int dst_rows, |
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struct uni_screen *src, |
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unsigned int src_cols, |
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unsigned int src_top_row, |
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unsigned int src_bot_row) |
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{ |
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unsigned int dst_row = 0; |
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if (!dst) |
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return; |
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while (src_top_row < src_bot_row) { |
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char32_t *src_line = src->lines[src_top_row]; |
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char32_t *dst_line = dst->lines[dst_row]; |
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memcpy(dst_line, src_line, src_cols * sizeof(char32_t)); |
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if (dst_cols - src_cols) |
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memset32(dst_line + src_cols, ' ', dst_cols - src_cols); |
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src_top_row++; |
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dst_row++; |
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} |
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while (dst_row < dst_rows) { |
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char32_t *dst_line = dst->lines[dst_row]; |
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memset32(dst_line, ' ', dst_cols); |
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dst_row++; |
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} |
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} |
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/* |
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* Called from vcs_read() to make sure unicode screen retrieval is possible. |
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* This will initialize the unicode screen buffer if not already done. |
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* This returns 0 if OK, or a negative error code otherwise. |
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* In particular, -ENODATA is returned if the console is not in UTF-8 mode. |
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*/ |
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int vc_uniscr_check(struct vc_data *vc) |
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{ |
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struct uni_screen *uniscr; |
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unsigned short *p; |
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int x, y, mask; |
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if (__is_defined(NO_VC_UNI_SCREEN)) |
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return -EOPNOTSUPP; |
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WARN_CONSOLE_UNLOCKED(); |
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if (!vc->vc_utf) |
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return -ENODATA; |
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if (vc->vc_uni_screen) |
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return 0; |
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uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows); |
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if (!uniscr) |
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return -ENOMEM; |
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/* |
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* Let's populate it initially with (imperfect) reverse translation. |
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* This is the next best thing we can do short of having it enabled |
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* from the start even when no users rely on this functionality. True |
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* unicode content will be available after a complete screen refresh. |
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*/ |
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p = (unsigned short *)vc->vc_origin; |
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mask = vc->vc_hi_font_mask | 0xff; |
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for (y = 0; y < vc->vc_rows; y++) { |
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char32_t *line = uniscr->lines[y]; |
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for (x = 0; x < vc->vc_cols; x++) { |
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u16 glyph = scr_readw(p++) & mask; |
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line[x] = inverse_translate(vc, glyph, true); |
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} |
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} |
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vc->vc_uni_screen = uniscr; |
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return 0; |
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} |
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/* |
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* Called from vcs_read() to get the unicode data from the screen. |
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* This must be preceded by a successful call to vc_uniscr_check() once |
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* the console lock has been taken. |
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*/ |
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void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, |
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unsigned int row, unsigned int col, unsigned int nr) |
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{ |
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struct uni_screen *uniscr = get_vc_uniscr(vc); |
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int offset = row * vc->vc_size_row + col * 2; |
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unsigned long pos; |
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|
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BUG_ON(!uniscr); |
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pos = (unsigned long)screenpos(vc, offset, viewed); |
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if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { |
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/* |
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* Desired position falls in the main screen buffer. |
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* However the actual row/col might be different if |
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* scrollback is active. |
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*/ |
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row = (pos - vc->vc_origin) / vc->vc_size_row; |
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col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2; |
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memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t)); |
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} else { |
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/* |
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* Scrollback is active. For now let's simply backtranslate |
|
* the screen glyphs until the unicode screen buffer does |
|
* synchronize with console display drivers for a scrollback |
|
* buffer of its own. |
|
*/ |
|
u16 *p = (u16 *)pos; |
|
int mask = vc->vc_hi_font_mask | 0xff; |
|
char32_t *uni_buf = dest; |
|
while (nr--) { |
|
u16 glyph = scr_readw(p++) & mask; |
|
*uni_buf++ = inverse_translate(vc, glyph, true); |
|
} |
|
} |
|
} |
|
|
|
/* this is for validation and debugging only */ |
|
static void vc_uniscr_debug_check(struct vc_data *vc) |
|
{ |
|
struct uni_screen *uniscr = get_vc_uniscr(vc); |
|
unsigned short *p; |
|
int x, y, mask; |
|
|
|
if (!VC_UNI_SCREEN_DEBUG || !uniscr) |
|
return; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
/* |
|
* Make sure our unicode screen translates into the same glyphs |
|
* as the actual screen. This is brutal indeed. |
|
*/ |
|
p = (unsigned short *)vc->vc_origin; |
|
mask = vc->vc_hi_font_mask | 0xff; |
|
for (y = 0; y < vc->vc_rows; y++) { |
|
char32_t *line = uniscr->lines[y]; |
|
for (x = 0; x < vc->vc_cols; x++) { |
|
u16 glyph = scr_readw(p++) & mask; |
|
char32_t uc = line[x]; |
|
int tc = conv_uni_to_pc(vc, uc); |
|
if (tc == -4) |
|
tc = conv_uni_to_pc(vc, 0xfffd); |
|
if (tc == -4) |
|
tc = conv_uni_to_pc(vc, '?'); |
|
if (tc != glyph) |
|
pr_err_ratelimited( |
|
"%s: mismatch at %d,%d: glyph=%#x tc=%#x\n", |
|
__func__, x, y, glyph, tc); |
|
} |
|
} |
|
} |
|
|
|
|
|
static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b, |
|
enum con_scroll dir, unsigned int nr) |
|
{ |
|
u16 *clear, *d, *s; |
|
|
|
if (t + nr >= b) |
|
nr = b - t - 1; |
|
if (b > vc->vc_rows || t >= b || nr < 1) |
|
return; |
|
vc_uniscr_scroll(vc, t, b, dir, nr); |
|
if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr)) |
|
return; |
|
|
|
s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t); |
|
d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr)); |
|
|
|
if (dir == SM_UP) { |
|
clear = s + (b - t - nr) * vc->vc_cols; |
|
swap(s, d); |
|
} |
|
scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); |
|
scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr); |
|
} |
|
|
|
static void do_update_region(struct vc_data *vc, unsigned long start, int count) |
|
{ |
|
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); |
|
} |
|
} |
|
} |
|
|
|
void update_region(struct vc_data *vc, unsigned long start, int count) |
|
{ |
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
if (con_should_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, |
|
enum vc_intensity _intensity, bool _blink, bool _underline, |
|
bool _reverse, bool _italic) |
|
{ |
|
if (vc->vc_sw->con_build_attr) |
|
return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
|
_blink, _underline, _reverse, _italic); |
|
|
|
/* |
|
* ++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 << 1) | |
|
(_underline << 2) | |
|
(_reverse << 3) | |
|
(_blink << 7); |
|
if (_italic) |
|
a = (a & 0xF0) | vc->vc_itcolor; |
|
else if (_underline) |
|
a = (a & 0xf0) | vc->vc_ulcolor; |
|
else if (_intensity == VCI_HALF_BRIGHT) |
|
a = (a & 0xf0) | vc->vc_halfcolor; |
|
if (_reverse) |
|
a = (a & 0x88) | (((a >> 4) | (a << 4)) & 0x77); |
|
if (_blink) |
|
a ^= 0x80; |
|
if (_intensity == VCI_BOLD) |
|
a ^= 0x08; |
|
if (vc->vc_hi_font_mask == 0x100) |
|
a <<= 1; |
|
return a; |
|
} |
|
} |
|
|
|
static void update_attr(struct vc_data *vc) |
|
{ |
|
vc->vc_attr = build_attr(vc, vc->state.color, vc->state.intensity, |
|
vc->state.blink, vc->state.underline, |
|
vc->state.reverse ^ vc->vc_decscnm, vc->state.italic); |
|
vc->vc_video_erase_char = ' ' | (build_attr(vc, vc->state.color, |
|
VCI_NORMAL, vc->state.blink, false, |
|
vc->vc_decscnm, false) << 8); |
|
} |
|
|
|
/* Note: inverting the screen twice should revert to the original state */ |
|
void invert_screen(struct vc_data *vc, int offset, int count, bool 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); |
|
} 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++; |
|
} |
|
} |
|
} |
|
|
|
if (con_should_update(vc)) |
|
do_update_region(vc, (unsigned long) p, count); |
|
notify_update(vc); |
|
} |
|
|
|
/* 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, true)); |
|
if (con_should_update(vc)) |
|
vc->vc_sw->con_putc(vc, old, oldy, oldx); |
|
notify_update(vc); |
|
} |
|
|
|
old_offset = offset; |
|
|
|
if (offset != -1 && offset >= 0 && |
|
offset < vc->vc_screenbuf_size) { |
|
unsigned short new; |
|
unsigned short *p; |
|
p = screenpos(vc, offset, true); |
|
old = scr_readw(p); |
|
new = old ^ vc->vc_complement_mask; |
|
scr_writew(new, p); |
|
if (con_should_update(vc)) { |
|
oldx = (offset >> 1) % vc->vc_cols; |
|
oldy = (offset >> 1) / vc->vc_cols; |
|
vc->vc_sw->con_putc(vc, new, oldy, oldx); |
|
} |
|
notify_update(vc); |
|
} |
|
} |
|
|
|
static void insert_char(struct vc_data *vc, unsigned int nr) |
|
{ |
|
unsigned short *p = (unsigned short *) vc->vc_pos; |
|
|
|
vc_uniscr_insert(vc, nr); |
|
scr_memmovew(p + nr, p, (vc->vc_cols - vc->state.x - nr) * 2); |
|
scr_memsetw(p, vc->vc_video_erase_char, nr * 2); |
|
vc->vc_need_wrap = 0; |
|
if (con_should_update(vc)) |
|
do_update_region(vc, (unsigned long) p, |
|
vc->vc_cols - vc->state.x); |
|
} |
|
|
|
static void delete_char(struct vc_data *vc, unsigned int nr) |
|
{ |
|
unsigned short *p = (unsigned short *) vc->vc_pos; |
|
|
|
vc_uniscr_delete(vc, nr); |
|
scr_memcpyw(p, p + nr, (vc->vc_cols - vc->state.x - nr) * 2); |
|
scr_memsetw(p + vc->vc_cols - vc->state.x - nr, vc->vc_video_erase_char, |
|
nr * 2); |
|
vc->vc_need_wrap = 0; |
|
if (con_should_update(vc)) |
|
do_update_region(vc, (unsigned long) p, |
|
vc->vc_cols - vc->state.x); |
|
} |
|
|
|
static int softcursor_original = -1; |
|
|
|
static void add_softcursor(struct vc_data *vc) |
|
{ |
|
int i = scr_readw((u16 *) vc->vc_pos); |
|
u32 type = vc->vc_cursor_type; |
|
|
|
if (!(type & CUR_SW)) |
|
return; |
|
if (softcursor_original != -1) |
|
return; |
|
softcursor_original = i; |
|
i |= CUR_SET(type); |
|
i ^= CUR_CHANGE(type); |
|
if ((type & CUR_ALWAYS_BG) && |
|
(softcursor_original & CUR_BG) == (i & CUR_BG)) |
|
i ^= CUR_BG; |
|
if ((type & CUR_INVERT_FG_BG) && (i & CUR_FG) == ((i & CUR_BG) >> 4)) |
|
i ^= CUR_FG; |
|
scr_writew(i, (u16 *)vc->vc_pos); |
|
if (con_should_update(vc)) |
|
vc->vc_sw->con_putc(vc, i, vc->state.y, vc->state.x); |
|
} |
|
|
|
static void hide_softcursor(struct vc_data *vc) |
|
{ |
|
if (softcursor_original != -1) { |
|
scr_writew(softcursor_original, (u16 *)vc->vc_pos); |
|
if (con_should_update(vc)) |
|
vc->vc_sw->con_putc(vc, softcursor_original, |
|
vc->state.y, vc->state.x); |
|
softcursor_original = -1; |
|
} |
|
} |
|
|
|
static void hide_cursor(struct vc_data *vc) |
|
{ |
|
if (vc_is_sel(vc)) |
|
clear_selection(); |
|
|
|
vc->vc_sw->con_cursor(vc, CM_ERASE); |
|
hide_softcursor(vc); |
|
} |
|
|
|
static void set_cursor(struct vc_data *vc) |
|
{ |
|
if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS) |
|
return; |
|
if (vc->vc_deccm) { |
|
if (vc_is_sel(vc)) |
|
clear_selection(); |
|
add_softcursor(vc); |
|
if (CUR_SIZE(vc->vc_cursor_type) != CUR_NONE) |
|
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->state.y + |
|
2 * vc->state.x; |
|
} |
|
|
|
static void save_screen(struct vc_data *vc) |
|
{ |
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
if (vc->vc_sw->con_save_screen) |
|
vc->vc_sw->con_save_screen(vc); |
|
} |
|
|
|
static void flush_scrollback(struct vc_data *vc) |
|
{ |
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
set_origin(vc); |
|
if (vc->vc_sw->con_flush_scrollback) { |
|
vc->vc_sw->con_flush_scrollback(vc); |
|
} else if (con_is_visible(vc)) { |
|
/* |
|
* When no con_flush_scrollback method is provided then the |
|
* legacy way for flushing the scrollback buffer is to use |
|
* a side effect of the con_switch method. We do it only on |
|
* the foreground console as background consoles have no |
|
* scrollback buffers in that case and we obviously don't |
|
* want to switch to them. |
|
*/ |
|
hide_cursor(vc); |
|
vc->vc_sw->con_switch(vc); |
|
set_cursor(vc); |
|
} |
|
} |
|
|
|
/* |
|
* Redrawing of screen |
|
*/ |
|
|
|
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); |
|
} |
|
if (tty0dev) |
|
sysfs_notify(&tty0dev->kobj, NULL, "active"); |
|
} 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); |
|
} |
|
|
|
if (update && vc->vc_mode != KD_GRAPHICS) |
|
do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
|
} |
|
set_cursor(vc); |
|
if (is_switch) { |
|
vt_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; |
|
if (vc->vc_uni_pagedir_loc) |
|
con_free_unimap(vc); |
|
vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; |
|
vc->vc_uni_pagedir = NULL; |
|
vc->vc_hi_font_mask = 0; |
|
vc->vc_complement_mask = 0; |
|
vc->vc_can_do_color = 0; |
|
vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
|
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; |
|
} |
|
|
|
|
|
static void visual_deinit(struct vc_data *vc) |
|
{ |
|
vc->vc_sw->con_deinit(vc); |
|
module_put(vc->vc_sw->owner); |
|
} |
|
|
|
static void vc_port_destruct(struct tty_port *port) |
|
{ |
|
struct vc_data *vc = container_of(port, struct vc_data, port); |
|
|
|
kfree(vc); |
|
} |
|
|
|
static const struct tty_port_operations vc_port_ops = { |
|
.destruct = vc_port_destruct, |
|
}; |
|
|
|
/* |
|
* 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_MAXCOL (32767) |
|
#define VC_MAXROW (32767) |
|
|
|
int vc_allocate(unsigned int currcons) /* return 0 on success */ |
|
{ |
|
struct vt_notifier_param param; |
|
struct vc_data *vc; |
|
int err; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
if (currcons >= MAX_NR_CONSOLES) |
|
return -ENXIO; |
|
|
|
if (vc_cons[currcons].d) |
|
return 0; |
|
|
|
/* 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); |
|
vc->port.ops = &vc_port_ops; |
|
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); |
|
|
|
err = -EINVAL; |
|
if (vc->vc_cols > VC_MAXCOL || vc->vc_rows > VC_MAXROW || |
|
vc->vc_screenbuf_size > KMALLOC_MAX_SIZE || !vc->vc_screenbuf_size) |
|
goto err_free; |
|
err = -ENOMEM; |
|
vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
|
if (!vc->vc_screenbuf) |
|
goto err_free; |
|
|
|
/* 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; |
|
err_free: |
|
visual_deinit(vc); |
|
kfree(vc); |
|
vc_cons[currcons].d = NULL; |
|
return err; |
|
} |
|
|
|
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_sw->con_resize) |
|
err = vc->vc_sw->con_resize(vc, width, height, user); |
|
|
|
return err; |
|
} |
|
|
|
/** |
|
* vc_do_resize - resizing method for the tty |
|
* @tty: tty being resized |
|
* @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 rwsem 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_rows, old_row_size, first_copied_row; |
|
unsigned int new_cols, new_rows, new_row_size, new_screen_size; |
|
unsigned int user; |
|
unsigned short *oldscreen, *newscreen; |
|
struct uni_screen *new_uniscr = NULL; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
if (!vc) |
|
return -ENXIO; |
|
|
|
user = vc->vc_resize_user; |
|
vc->vc_resize_user = 0; |
|
|
|
if (cols > VC_MAXCOL || lines > VC_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; |
|
|
|
if (new_screen_size > KMALLOC_MAX_SIZE || !new_screen_size) |
|
return -EINVAL; |
|
newscreen = kzalloc(new_screen_size, GFP_USER); |
|
if (!newscreen) |
|
return -ENOMEM; |
|
|
|
if (get_vc_uniscr(vc)) { |
|
new_uniscr = vc_uniscr_alloc(new_cols, new_rows); |
|
if (!new_uniscr) { |
|
kfree(newscreen); |
|
return -ENOMEM; |
|
} |
|
} |
|
|
|
if (vc_is_sel(vc)) |
|
clear_selection(); |
|
|
|
old_rows = vc->vc_rows; |
|
old_row_size = vc->vc_size_row; |
|
|
|
err = resize_screen(vc, new_cols, new_rows, user); |
|
if (err) { |
|
kfree(newscreen); |
|
vc_uniscr_free(new_uniscr); |
|
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->state.y > new_rows) { |
|
if (old_rows - vc->state.y < new_rows) { |
|
/* |
|
* Cursor near the bottom, copy contents from the |
|
* bottom of buffer |
|
*/ |
|
first_copied_row = (old_rows - new_rows); |
|
} else { |
|
/* |
|
* Cursor is in no man's land, copy 1/2 screenful |
|
* from the top and bottom of cursor position |
|
*/ |
|
first_copied_row = (vc->state.y - new_rows/2); |
|
} |
|
old_origin += first_copied_row * old_row_size; |
|
} else |
|
first_copied_row = 0; |
|
end = old_origin + old_row_size * min(old_rows, new_rows); |
|
|
|
vc_uniscr_copy_area(new_uniscr, new_cols, new_rows, |
|
get_vc_uniscr(vc), rlth/2, first_copied_row, |
|
min(old_rows, new_rows)); |
|
vc_uniscr_set(vc, new_uniscr); |
|
|
|
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); |
|
oldscreen = vc->vc_screenbuf; |
|
vc->vc_screenbuf = newscreen; |
|
vc->vc_screenbuf_size = new_screen_size; |
|
set_origin(vc); |
|
kfree(oldscreen); |
|
|
|
/* do part of a reset_terminal() */ |
|
vc->vc_top = 0; |
|
vc->vc_bottom = vc->vc_rows; |
|
gotoxy(vc, vc->state.x, vc->state.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); |
|
notify_update(vc); |
|
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_rwsem 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; |
|
|
|
console_lock(); |
|
ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); |
|
console_unlock(); |
|
return ret; |
|
} |
|
|
|
struct vc_data *vc_deallocate(unsigned int currcons) |
|
{ |
|
struct vc_data *vc = NULL; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
if (vc_cons_allocated(currcons)) { |
|
struct vt_notifier_param param; |
|
|
|
param.vc = vc = vc_cons[currcons].d; |
|
atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); |
|
vcs_remove_sysfs(currcons); |
|
visual_deinit(vc); |
|
con_free_unimap(vc); |
|
put_pid(vc->vt_pid); |
|
vc_uniscr_set(vc, NULL); |
|
kfree(vc->vc_screenbuf); |
|
vc_cons[currcons].d = NULL; |
|
} |
|
return vc; |
|
} |
|
|
|
/* |
|
* VT102 emulator |
|
*/ |
|
|
|
enum { EPecma = 0, EPdec, EPeq, EPgt, EPlt}; |
|
|
|
#define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) |
|
#define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) |
|
#define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) |
|
|
|
#define decarm VC_REPEAT |
|
#define decckm VC_CKMODE |
|
#define kbdapplic VC_APPLIC |
|
#define lnm VC_CRLF |
|
|
|
const 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 */ |
|
unsigned char default_red[] = { |
|
0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, |
|
0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff |
|
}; |
|
module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR); |
|
|
|
unsigned char default_grn[] = { |
|
0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa, |
|
0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff |
|
}; |
|
module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR); |
|
|
|
unsigned char default_blu[] = { |
|
0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, |
|
0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff |
|
}; |
|
module_param_array(default_blu, byte, 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->state.x = 0; |
|
else { |
|
if (new_x >= vc->vc_cols) |
|
vc->state.x = vc->vc_cols - 1; |
|
else |
|
vc->state.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->state.y = min_y; |
|
else if (new_y >= max_y) |
|
vc->state.y = max_y - 1; |
|
else |
|
vc->state.y = new_y; |
|
vc->vc_pos = vc->vc_origin + vc->state.y * vc->vc_size_row + |
|
(vc->state.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) |
|
{ |
|
scrolldelta(-(vc->vc_rows / 2)); |
|
} |
|
|
|
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->state.y + 1 == vc->vc_bottom) |
|
con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1); |
|
else if (vc->state.y < vc->vc_rows - 1) { |
|
vc->state.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->state.y == vc->vc_top) |
|
con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1); |
|
else if (vc->state.y > 0) { |
|
vc->state.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->state.x << 1; |
|
vc->vc_need_wrap = vc->state.x = 0; |
|
notify_write(vc, '\r'); |
|
} |
|
|
|
static inline void bs(struct vc_data *vc) |
|
{ |
|
if (vc->state.x) { |
|
vc->vc_pos -= 2; |
|
vc->state.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 */ |
|
vc_uniscr_clear_line(vc, vc->state.x, |
|
vc->vc_cols - vc->state.x); |
|
vc_uniscr_clear_lines(vc, vc->state.y + 1, |
|
vc->vc_rows - vc->state.y - 1); |
|
count = (vc->vc_scr_end - vc->vc_pos) >> 1; |
|
start = (unsigned short *)vc->vc_pos; |
|
break; |
|
case 1: /* erase from start to cursor */ |
|
vc_uniscr_clear_line(vc, 0, vc->state.x + 1); |
|
vc_uniscr_clear_lines(vc, 0, vc->state.y); |
|
count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; |
|
start = (unsigned short *)vc->vc_origin; |
|
break; |
|
case 3: /* include scrollback */ |
|
flush_scrollback(vc); |
|
fallthrough; |
|
case 2: /* erase whole display */ |
|
vc_uniscr_clear_lines(vc, 0, vc->vc_rows); |
|
count = vc->vc_cols * vc->vc_rows; |
|
start = (unsigned short *)vc->vc_origin; |
|
break; |
|
default: |
|
return; |
|
} |
|
scr_memsetw(start, vc->vc_video_erase_char, 2 * count); |
|
if (con_should_update(vc)) |
|
do_update_region(vc, (unsigned long) start, count); |
|
vc->vc_need_wrap = 0; |
|
} |
|
|
|
static void csi_K(struct vc_data *vc, int vpar) |
|
{ |
|
unsigned int count; |
|
unsigned short *start = (unsigned short *)vc->vc_pos; |
|
int offset; |
|
|
|
switch (vpar) { |
|
case 0: /* erase from cursor to end of line */ |
|
offset = 0; |
|
count = vc->vc_cols - vc->state.x; |
|
break; |
|
case 1: /* erase from start of line to cursor */ |
|
offset = -vc->state.x; |
|
count = vc->state.x + 1; |
|
break; |
|
case 2: /* erase whole line */ |
|
offset = -vc->state.x; |
|
count = vc->vc_cols; |
|
break; |
|
default: |
|
return; |
|
} |
|
vc_uniscr_clear_line(vc, vc->state.x + offset, count); |
|
scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count); |
|
vc->vc_need_wrap = 0; |
|
if (con_should_update(vc)) |
|
do_update_region(vc, (unsigned long)(start + offset), count); |
|
} |
|
|
|
/* erase the following vpar positions */ |
|
static void csi_X(struct vc_data *vc, unsigned int vpar) |
|
{ /* not vt100? */ |
|
unsigned int count; |
|
|
|
if (!vpar) |
|
vpar++; |
|
|
|
count = min(vpar, vc->vc_cols - vc->state.x); |
|
|
|
vc_uniscr_clear_line(vc, vc->state.x, count); |
|
scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); |
|
if (con_should_update(vc)) |
|
vc->vc_sw->con_clear(vc, vc->state.y, vc->state.x, 1, count); |
|
vc->vc_need_wrap = 0; |
|
} |
|
|
|
static void default_attr(struct vc_data *vc) |
|
{ |
|
vc->state.intensity = VCI_NORMAL; |
|
vc->state.italic = false; |
|
vc->state.underline = false; |
|
vc->state.reverse = false; |
|
vc->state.blink = false; |
|
vc->state.color = vc->vc_def_color; |
|
} |
|
|
|
struct rgb { u8 r; u8 g; u8 b; }; |
|
|
|
static void rgb_from_256(int i, struct rgb *c) |
|
{ |
|
if (i < 8) { /* Standard colours. */ |
|
c->r = i&1 ? 0xaa : 0x00; |
|
c->g = i&2 ? 0xaa : 0x00; |
|
c->b = i&4 ? 0xaa : 0x00; |
|
} else if (i < 16) { |
|
c->r = i&1 ? 0xff : 0x55; |
|
c->g = i&2 ? 0xff : 0x55; |
|
c->b = i&4 ? 0xff : 0x55; |
|
} else if (i < 232) { /* 6x6x6 colour cube. */ |
|
c->r = (i - 16) / 36 * 85 / 2; |
|
c->g = (i - 16) / 6 % 6 * 85 / 2; |
|
c->b = (i - 16) % 6 * 85 / 2; |
|
} else /* Grayscale ramp. */ |
|
c->r = c->g = c->b = i * 10 - 2312; |
|
} |
|
|
|
static void rgb_foreground(struct vc_data *vc, const struct rgb *c) |
|
{ |
|
u8 hue = 0, max = max3(c->r, c->g, c->b); |
|
|
|
if (c->r > max / 2) |
|
hue |= 4; |
|
if (c->g > max / 2) |
|
hue |= 2; |
|
if (c->b > max / 2) |
|
hue |= 1; |
|
|
|
if (hue == 7 && max <= 0x55) { |
|
hue = 0; |
|
vc->state.intensity = VCI_BOLD; |
|
} else if (max > 0xaa) |
|
vc->state.intensity = VCI_BOLD; |
|
else |
|
vc->state.intensity = VCI_NORMAL; |
|
|
|
vc->state.color = (vc->state.color & 0xf0) | hue; |
|
} |
|
|
|
static void rgb_background(struct vc_data *vc, const struct rgb *c) |
|
{ |
|
/* For backgrounds, err on the dark side. */ |
|
vc->state.color = (vc->state.color & 0x0f) |
|
| (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3; |
|
} |
|
|
|
/* |
|
* ITU T.416 Higher colour modes. They break the usual properties of SGR codes |
|
* and thus need to be detected and ignored by hand. That standard also |
|
* wants : rather than ; as separators but sequences containing : are currently |
|
* completely ignored by the parser. |
|
* |
|
* Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in |
|
* supporting them. |
|
*/ |
|
static int vc_t416_color(struct vc_data *vc, int i, |
|
void(*set_color)(struct vc_data *vc, const struct rgb *c)) |
|
{ |
|
struct rgb c; |
|
|
|
i++; |
|
if (i > vc->vc_npar) |
|
return i; |
|
|
|
if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) { |
|
/* 256 colours */ |
|
i++; |
|
rgb_from_256(vc->vc_par[i], &c); |
|
} else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) { |
|
/* 24 bit */ |
|
c.r = vc->vc_par[i + 1]; |
|
c.g = vc->vc_par[i + 2]; |
|
c.b = vc->vc_par[i + 3]; |
|
i += 3; |
|
} else |
|
return i; |
|
|
|
set_color(vc, &c); |
|
|
|
return i; |
|
} |
|
|
|
/* console_lock 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->state.intensity = VCI_BOLD; |
|
break; |
|
case 2: |
|
vc->state.intensity = VCI_HALF_BRIGHT; |
|
break; |
|
case 3: |
|
vc->state.italic = true; |
|
break; |
|
case 21: |
|
/* |
|
* No console drivers support double underline, so |
|
* convert it to a single underline. |
|
*/ |
|
case 4: |
|
vc->state.underline = true; |
|
break; |
|
case 5: |
|
vc->state.blink = true; |
|
break; |
|
case 7: |
|
vc->state.reverse = true; |
|
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->state.Gx_charset[vc->state.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 22: |
|
vc->state.intensity = VCI_NORMAL; |
|
break; |
|
case 23: |
|
vc->state.italic = false; |
|
break; |
|
case 24: |
|
vc->state.underline = false; |
|
break; |
|
case 25: |
|
vc->state.blink = false; |
|
break; |
|
case 27: |
|
vc->state.reverse = false; |
|
break; |
|
case 38: |
|
i = vc_t416_color(vc, i, rgb_foreground); |
|
break; |
|
case 48: |
|
i = vc_t416_color(vc, i, rgb_background); |
|
break; |
|
case 39: |
|
vc->state.color = (vc->vc_def_color & 0x0f) | |
|
(vc->state.color & 0xf0); |
|
break; |
|
case 49: |
|
vc->state.color = (vc->vc_def_color & 0xf0) | |
|
(vc->state.color & 0x0f); |
|
break; |
|
default: |
|
if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) { |
|
if (vc->vc_par[i] < 100) |
|
vc->state.intensity = VCI_BOLD; |
|
vc->vc_par[i] -= 60; |
|
} |
|
if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) |
|
vc->state.color = color_table[vc->vc_par[i] - 30] |
|
| (vc->state.color & 0xf0); |
|
else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) |
|
vc->state.color = (color_table[vc->vc_par[i] - 40] << 4) |
|
| (vc->state.color & 0x0f); |
|
break; |
|
} |
|
update_attr(vc); |
|
} |
|
|
|
static void respond_string(const char *p, size_t len, struct tty_port *port) |
|
{ |
|
tty_insert_flip_string(port, p, len); |
|
tty_schedule_flip(port); |
|
} |
|
|
|
static void cursor_report(struct vc_data *vc, struct tty_struct *tty) |
|
{ |
|
char buf[40]; |
|
int len; |
|
|
|
len = sprintf(buf, "\033[%d;%dR", vc->state.y + |
|
(vc->vc_decom ? vc->vc_top + 1 : 1), |
|
vc->state.x + 1); |
|
respond_string(buf, len, tty->port); |
|
} |
|
|
|
static inline void status_report(struct tty_struct *tty) |
|
{ |
|
static const char teminal_ok[] = "\033[0n"; |
|
|
|
respond_string(teminal_ok, strlen(teminal_ok), tty->port); |
|
} |
|
|
|
static inline void respond_ID(struct tty_struct *tty) |
|
{ |
|
/* terminal answer to an ESC-Z or csi0c query. */ |
|
static const char vt102_id[] = "\033[?6c"; |
|
|
|
respond_string(vt102_id, strlen(vt102_id), tty->port); |
|
} |
|
|
|
void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) |
|
{ |
|
char buf[8]; |
|
int len; |
|
|
|
len = sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), |
|
(char)('!' + mrx), (char)('!' + mry)); |
|
respond_string(buf, len, tty->port); |
|
} |
|
|
|
/* invoked via ioctl(TIOCLINUX) and through set_selection_user */ |
|
int mouse_reporting(void) |
|
{ |
|
return vc_cons[fg_console].d->vc_report_mouse; |
|
} |
|
|
|
/* console_lock 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_priv == EPdec) { |
|
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 */ |
|
#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, |
|
false); |
|
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_lock 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->state.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->state.intensity == VCI_HALF_BRIGHT) |
|
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 = min(vc->vc_par[1], 60U) * 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) ? |
|
msecs_to_jiffies(vc->vc_par[1]) : 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 = min(vc->vc_par[1], 60U) * 60 * HZ; |
|
break; |
|
case 15: /* activate the previous console */ |
|
set_console(last_console); |
|
break; |
|
case 16: /* set cursor blink duration in msec */ |
|
if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 && |
|
vc->vc_par[1] <= USHRT_MAX) |
|
vc->vc_cur_blink_ms = vc->vc_par[1]; |
|
else |
|
vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
|
break; |
|
} |
|
} |
|
|
|
/* console_lock is held */ |
|
static void csi_at(struct vc_data *vc, unsigned int nr) |
|
{ |
|
if (nr > vc->vc_cols - vc->state.x) |
|
nr = vc->vc_cols - vc->state.x; |
|
else if (!nr) |
|
nr = 1; |
|
insert_char(vc, nr); |
|
} |
|
|
|
/* console_lock is held */ |
|
static void csi_L(struct vc_data *vc, unsigned int nr) |
|
{ |
|
if (nr > vc->vc_rows - vc->state.y) |
|
nr = vc->vc_rows - vc->state.y; |
|
else if (!nr) |
|
nr = 1; |
|
con_scroll(vc, vc->state.y, vc->vc_bottom, SM_DOWN, nr); |
|
vc->vc_need_wrap = 0; |
|
} |
|
|
|
/* console_lock is held */ |
|
static void csi_P(struct vc_data *vc, unsigned int nr) |
|
{ |
|
if (nr > vc->vc_cols - vc->state.x) |
|
nr = vc->vc_cols - vc->state.x; |
|
else if (!nr) |
|
nr = 1; |
|
delete_char(vc, nr); |
|
} |
|
|
|
/* console_lock is held */ |
|
static void csi_M(struct vc_data *vc, unsigned int nr) |
|
{ |
|
if (nr > vc->vc_rows - vc->state.y) |
|
nr = vc->vc_rows - vc->state.y; |
|
else if (!nr) |
|
nr=1; |
|
con_scroll(vc, vc->state.y, vc->vc_bottom, SM_UP, nr); |
|
vc->vc_need_wrap = 0; |
|
} |
|
|
|
/* console_lock is held (except via vc_init->reset_terminal */ |
|
static void save_cur(struct vc_data *vc) |
|
{ |
|
memcpy(&vc->saved_state, &vc->state, sizeof(vc->state)); |
|
} |
|
|
|
/* console_lock is held */ |
|
static void restore_cur(struct vc_data *vc) |
|
{ |
|
memcpy(&vc->state, &vc->saved_state, sizeof(vc->state)); |
|
|
|
gotoxy(vc, vc->state.x, vc->state.y); |
|
vc->vc_translate = set_translate(vc->state.Gx_charset[vc->state.charset], |
|
vc); |
|
update_attr(vc); |
|
vc->vc_need_wrap = 0; |
|
} |
|
|
|
enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, |
|
EShash, ESsetG0, ESsetG1, ESpercent, EScsiignore, ESnonstd, |
|
ESpalette, ESosc }; |
|
|
|
/* console_lock is held (except via vc_init()) */ |
|
static void reset_terminal(struct vc_data *vc, int do_clear) |
|
{ |
|
unsigned int i; |
|
|
|
vc->vc_top = 0; |
|
vc->vc_bottom = vc->vc_rows; |
|
vc->vc_state = ESnormal; |
|
vc->vc_priv = EPecma; |
|
vc->vc_translate = set_translate(LAT1_MAP, vc); |
|
vc->state.Gx_charset[0] = LAT1_MAP; |
|
vc->state.Gx_charset[1] = GRAF_MAP; |
|
vc->state.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; |
|
|
|
vt_reset_keyboard(vc->vc_num); |
|
|
|
vc->vc_cursor_type = cur_default; |
|
vc->vc_complement_mask = vc->vc_s_complement_mask; |
|
|
|
default_attr(vc); |
|
update_attr(vc); |
|
|
|
bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT); |
|
for (i = 0; i < VC_TABSTOPS_COUNT; i += 8) |
|
set_bit(i, vc->vc_tab_stop); |
|
|
|
vc->vc_bell_pitch = DEFAULT_BELL_PITCH; |
|
vc->vc_bell_duration = DEFAULT_BELL_DURATION; |
|
vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
|
|
|
gotoxy(vc, 0, 0); |
|
save_cur(vc); |
|
if (do_clear) |
|
csi_J(vc, 2); |
|
} |
|
|
|
static void vc_setGx(struct vc_data *vc, unsigned int which, int c) |
|
{ |
|
unsigned char *charset = &vc->state.Gx_charset[which]; |
|
|
|
switch (c) { |
|
case '0': |
|
*charset = GRAF_MAP; |
|
break; |
|
case 'B': |
|
*charset = LAT1_MAP; |
|
break; |
|
case 'U': |
|
*charset = IBMPC_MAP; |
|
break; |
|
case 'K': |
|
*charset = USER_MAP; |
|
break; |
|
} |
|
|
|
if (vc->state.charset == which) |
|
vc->vc_translate = set_translate(*charset, vc); |
|
} |
|
|
|
/* console_lock 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. |
|
*/ |
|
if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */ |
|
return; |
|
switch (c) { |
|
case 0: |
|
return; |
|
case 7: |
|
if (vc->vc_state == ESosc) |
|
vc->vc_state = ESnormal; |
|
else 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->state.x << 1); |
|
|
|
vc->state.x = find_next_bit(vc->vc_tab_stop, |
|
min(vc->vc_cols - 1, VC_TABSTOPS_COUNT), |
|
vc->state.x + 1); |
|
if (vc->state.x >= VC_TABSTOPS_COUNT) |
|
vc->state.x = vc->vc_cols - 1; |
|
|
|
vc->vc_pos += (vc->state.x << 1); |
|
notify_write(vc, '\t'); |
|
return; |
|
case 10: case 11: case 12: |
|
lf(vc); |
|
if (!is_kbd(vc, lnm)) |
|
return; |
|
fallthrough; |
|
case 13: |
|
cr(vc); |
|
return; |
|
case 14: |
|
vc->state.charset = 1; |
|
vc->vc_translate = set_translate(vc->state.Gx_charset[1], vc); |
|
vc->vc_disp_ctrl = 1; |
|
return; |
|
case 15: |
|
vc->state.charset = 0; |
|
vc->vc_translate = set_translate(vc->state.Gx_charset[0], 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': |
|
if (vc->state.x < VC_TABSTOPS_COUNT) |
|
set_bit(vc->state.x, vc->vc_tab_stop); |
|
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 if (c>='0' && c<='9') |
|
vc->vc_state = ESosc; |
|
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; |
|
} |
|
switch (c) { |
|
case '?': |
|
vc->vc_priv = EPdec; |
|
return; |
|
case '>': |
|
vc->vc_priv = EPgt; |
|
return; |
|
case '=': |
|
vc->vc_priv = EPeq; |
|
return; |
|
case '<': |
|
vc->vc_priv = EPlt; |
|
return; |
|
} |
|
vc->vc_priv = EPecma; |
|
fallthrough; |
|
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; |
|
} |
|
if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */ |
|
vc->vc_state = EScsiignore; |
|
return; |
|
} |
|
vc->vc_state = ESnormal; |
|
switch(c) { |
|
case 'h': |
|
if (vc->vc_priv <= EPdec) |
|
set_mode(vc, 1); |
|
return; |
|
case 'l': |
|
if (vc->vc_priv <= EPdec) |
|
set_mode(vc, 0); |
|
return; |
|
case 'c': |
|
if (vc->vc_priv == EPdec) { |
|
if (vc->vc_par[0]) |
|
vc->vc_cursor_type = |
|
CUR_MAKE(vc->vc_par[0], |
|
vc->vc_par[1], |
|
vc->vc_par[2]); |
|
else |
|
vc->vc_cursor_type = cur_default; |
|
return; |
|
} |
|
break; |
|
case 'm': |
|
if (vc->vc_priv == EPdec) { |
|
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_priv == EPecma) { |
|
if (vc->vc_par[0] == 5) |
|
status_report(tty); |
|
else if (vc->vc_par[0] == 6) |
|
cursor_report(vc, tty); |
|
} |
|
return; |
|
} |
|
if (vc->vc_priv != EPecma) { |
|
vc->vc_priv = EPecma; |
|
return; |
|
} |
|
switch(c) { |
|
case 'G': case '`': |
|
if (vc->vc_par[0]) |
|
vc->vc_par[0]--; |
|
gotoxy(vc, vc->vc_par[0], vc->state.y); |
|
return; |
|
case 'A': |
|
if (!vc->vc_par[0]) |
|
vc->vc_par[0]++; |
|
gotoxy(vc, vc->state.x, vc->state.y - vc->vc_par[0]); |
|
return; |
|
case 'B': case 'e': |
|
if (!vc->vc_par[0]) |
|
vc->vc_par[0]++; |
|
gotoxy(vc, vc->state.x, vc->state.y + vc->vc_par[0]); |
|
return; |
|
case 'C': case 'a': |
|
if (!vc->vc_par[0]) |
|
vc->vc_par[0]++; |
|
gotoxy(vc, vc->state.x + vc->vc_par[0], vc->state.y); |
|
return; |
|
case 'D': |
|
if (!vc->vc_par[0]) |
|
vc->vc_par[0]++; |
|
gotoxy(vc, vc->state.x - vc->vc_par[0], vc->state.y); |
|
return; |
|
case 'E': |
|
if (!vc->vc_par[0]) |
|
vc->vc_par[0]++; |
|
gotoxy(vc, 0, vc->state.y + vc->vc_par[0]); |
|
return; |
|
case 'F': |
|
if (!vc->vc_par[0]) |
|
vc->vc_par[0]++; |
|
gotoxy(vc, 0, vc->state.y - vc->vc_par[0]); |
|
return; |
|
case 'd': |
|
if (vc->vc_par[0]) |
|
vc->vc_par[0]--; |
|
gotoxay(vc, vc->state.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->state.x < VC_TABSTOPS_COUNT) |
|
set_bit(vc->state.x, vc->vc_tab_stop); |
|
else if (vc->vc_par[0] == 3) |
|
bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT); |
|
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) |
|
vt_set_led_state(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 EScsiignore: |
|
if (c >= 20 && c <= 0x3f) |
|
return; |
|
vc->vc_state = ESnormal; |
|
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: |
|
vc_setGx(vc, 0, c); |
|
vc->vc_state = ESnormal; |
|
return; |
|
case ESsetG1: |
|
vc_setGx(vc, 1, c); |
|
vc->vc_state = ESnormal; |
|
return; |
|
case ESosc: |
|
return; |
|
default: |
|
vc->vc_state = ESnormal; |
|
} |
|
} |
|
|
|
/* is_double_width() is based on the wcwidth() implementation by |
|
* Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
|
* Latest version: https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
|
*/ |
|
struct interval { |
|
uint32_t first; |
|
uint32_t last; |
|
}; |
|
|
|
static int ucs_cmp(const void *key, const void *elt) |
|
{ |
|
uint32_t ucs = *(uint32_t *)key; |
|
struct interval e = *(struct interval *) elt; |
|
|
|
if (ucs > e.last) |
|
return 1; |
|
else if (ucs < e.first) |
|
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 } |
|
}; |
|
if (ucs < double_width[0].first || |
|
ucs > double_width[ARRAY_SIZE(double_width) - 1].last) |
|
return 0; |
|
|
|
return bsearch(&ucs, double_width, ARRAY_SIZE(double_width), |
|
sizeof(struct interval), ucs_cmp) != NULL; |
|
} |
|
|
|
struct vc_draw_region { |
|
unsigned long from, to; |
|
int x; |
|
}; |
|
|
|
static void con_flush(struct vc_data *vc, struct vc_draw_region *draw) |
|
{ |
|
if (draw->x < 0) |
|
return; |
|
|
|
vc->vc_sw->con_putcs(vc, (u16 *)draw->from, |
|
(u16 *)draw->to - (u16 *)draw->from, vc->state.y, |
|
draw->x); |
|
draw->x = -1; |
|
} |
|
|
|
static inline int vc_translate_ascii(const struct vc_data *vc, int c) |
|
{ |
|
if (IS_ENABLED(CONFIG_CONSOLE_TRANSLATIONS)) { |
|
if (vc->vc_toggle_meta) |
|
c |= 0x80; |
|
|
|
return vc->vc_translate[c]; |
|
} |
|
|
|
return c; |
|
} |
|
|
|
|
|
/** |
|
* vc_sanitize_unicode -- Replace invalid Unicode code points with U+FFFD |
|
* @c: the received character, or U+FFFD for invalid sequences. |
|
*/ |
|
static inline int vc_sanitize_unicode(const int c) |
|
{ |
|
if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) |
|
return 0xfffd; |
|
|
|
return c; |
|
} |
|
|
|
/** |
|
* vc_translate_unicode -- Combine UTF-8 into Unicode in @vc_utf_char |
|
* @vc: virtual console |
|
* @c: character to translate |
|
* @rescan: we return true if we need more (continuation) data |
|
* |
|
* @vc_utf_char is the being-constructed unicode character. |
|
* @vc_utf_count is the number of continuation bytes still expected to arrive. |
|
* @vc_npar is the number of continuation bytes arrived so far. |
|
*/ |
|
static int vc_translate_unicode(struct vc_data *vc, int c, bool *rescan) |
|
{ |
|
static const u32 utf8_length_changes[] = { |
|
0x0000007f, 0x000007ff, 0x0000ffff, |
|
0x001fffff, 0x03ffffff, 0x7fffffff |
|
}; |
|
|
|
/* Continuation byte received */ |
|
if ((c & 0xc0) == 0x80) { |
|
/* Unexpected continuation byte? */ |
|
if (!vc->vc_utf_count) |
|
return 0xfffd; |
|
|
|
vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
|
vc->vc_npar++; |
|
if (--vc->vc_utf_count) |
|
goto need_more_bytes; |
|
|
|
/* 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]) |
|
return 0xfffd; |
|
|
|
return vc_sanitize_unicode(c); |
|
} |
|
|
|
/* Single ASCII byte or first byte of a sequence received */ |
|
if (vc->vc_utf_count) { |
|
/* Continuation byte expected */ |
|
*rescan = true; |
|
vc->vc_utf_count = 0; |
|
return 0xfffd; |
|
} |
|
|
|
/* Nothing to do if an ASCII byte was received */ |
|
if (c <= 0x7f) |
|
return c; |
|
|
|
/* 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 */ |
|
return 0xfffd; |
|
} |
|
|
|
need_more_bytes: |
|
return -1; |
|
} |
|
|
|
static int vc_translate(struct vc_data *vc, int *c, bool *rescan) |
|
{ |
|
/* Do no translation at all in control states */ |
|
if (vc->vc_state != ESnormal) |
|
return *c; |
|
|
|
if (vc->vc_utf && !vc->vc_disp_ctrl) |
|
return *c = vc_translate_unicode(vc, *c, rescan); |
|
|
|
/* no utf or alternate charset mode */ |
|
return vc_translate_ascii(vc, *c); |
|
} |
|
|
|
static inline unsigned char vc_invert_attr(const struct vc_data *vc) |
|
{ |
|
if (!vc->vc_can_do_color) |
|
return vc->vc_attr ^ 0x08; |
|
|
|
if (vc->vc_hi_font_mask == 0x100) |
|
return (vc->vc_attr & 0x11) | |
|
((vc->vc_attr & 0xe0) >> 4) | |
|
((vc->vc_attr & 0x0e) << 4); |
|
|
|
return (vc->vc_attr & 0x88) | |
|
((vc->vc_attr & 0x70) >> 4) | |
|
((vc->vc_attr & 0x07) << 4); |
|
} |
|
|
|
static bool vc_is_control(struct vc_data *vc, int tc, int c) |
|
{ |
|
/* |
|
* 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. |
|
*/ |
|
static const u32 CTRL_ACTION = 0x0d00ff81; |
|
/* Cannot be overridden by disp_ctrl */ |
|
static const u32 CTRL_ALWAYS = 0x0800f501; |
|
|
|
if (vc->vc_state != ESnormal) |
|
return true; |
|
|
|
if (!tc) |
|
return true; |
|
|
|
/* |
|
* 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. |
|
*/ |
|
if (c < 32) { |
|
if (vc->vc_disp_ctrl) |
|
return CTRL_ALWAYS & BIT(c); |
|
else |
|
return vc->vc_utf || (CTRL_ACTION & BIT(c)); |
|
} |
|
|
|
if (c == 127 && !vc->vc_disp_ctrl) |
|
return true; |
|
|
|
if (c == 128 + 27) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
static int vc_con_write_normal(struct vc_data *vc, int tc, int c, |
|
struct vc_draw_region *draw) |
|
{ |
|
int next_c; |
|
unsigned char vc_attr = vc->vc_attr; |
|
u16 himask = vc->vc_hi_font_mask, charmask = himask ? 0x1ff : 0xff; |
|
u8 width = 1; |
|
bool inverse = false; |
|
|
|
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) |
|
return -1; /* 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 = true; |
|
tc = conv_uni_to_pc(vc, '?'); |
|
if (tc < 0) |
|
tc = '?'; |
|
|
|
vc_attr = vc_invert_attr(vc); |
|
con_flush(vc, draw); |
|
} |
|
} |
|
} |
|
|
|
next_c = c; |
|
while (1) { |
|
if (vc->vc_need_wrap || vc->vc_decim) |
|
con_flush(vc, draw); |
|
if (vc->vc_need_wrap) { |
|
cr(vc); |
|
lf(vc); |
|
} |
|
if (vc->vc_decim) |
|
insert_char(vc, 1); |
|
vc_uniscr_putc(vc, next_c); |
|
|
|
if (himask) |
|
tc = ((tc & 0x100) ? himask : 0) | |
|
(tc & 0xff); |
|
tc |= (vc_attr << 8) & ~himask; |
|
|
|
scr_writew(tc, (u16 *)vc->vc_pos); |
|
|
|
if (con_should_update(vc) && draw->x < 0) { |
|
draw->x = vc->state.x; |
|
draw->from = vc->vc_pos; |
|
} |
|
if (vc->state.x == vc->vc_cols - 1) { |
|
vc->vc_need_wrap = vc->vc_decawm; |
|
draw->to = vc->vc_pos + 2; |
|
} else { |
|
vc->state.x++; |
|
draw->to = (vc->vc_pos += 2); |
|
} |
|
|
|
if (!--width) |
|
break; |
|
|
|
/* A space is printed in the second column */ |
|
tc = conv_uni_to_pc(vc, ' '); |
|
if (tc < 0) |
|
tc = ' '; |
|
next_c = ' '; |
|
} |
|
notify_write(vc, c); |
|
|
|
if (inverse) |
|
con_flush(vc, draw); |
|
|
|
return 0; |
|
} |
|
|
|
/* acquires console_lock */ |
|
static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
|
{ |
|
struct vc_draw_region draw = { |
|
.x = -1, |
|
}; |
|
int c, tc, n = 0; |
|
unsigned int currcons; |
|
struct vc_data *vc; |
|
struct vt_notifier_param param; |
|
bool rescan; |
|
|
|
if (in_interrupt()) |
|
return count; |
|
|
|
console_lock(); |
|
vc = tty->driver_data; |
|
if (vc == NULL) { |
|
pr_err("vt: argh, driver_data is NULL !\n"); |
|
console_unlock(); |
|
return 0; |
|
} |
|
|
|
currcons = vc->vc_num; |
|
if (!vc_cons_allocated(currcons)) { |
|
/* could this happen? */ |
|
pr_warn_once("con_write: tty %d not allocated\n", currcons+1); |
|
console_unlock(); |
|
return 0; |
|
} |
|
|
|
|
|
/* undraw cursor first */ |
|
if (con_is_fg(vc)) |
|
hide_cursor(vc); |
|
|
|
param.vc = vc; |
|
|
|
while (!tty->stopped && count) { |
|
int orig = *buf; |
|
buf++; |
|
n++; |
|
count--; |
|
rescan_last_byte: |
|
c = orig; |
|
rescan = false; |
|
|
|
tc = vc_translate(vc, &c, &rescan); |
|
if (tc == -1) |
|
continue; |
|
|
|
param.c = tc; |
|
if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, |
|
¶m) == NOTIFY_STOP) |
|
continue; |
|
|
|
if (vc_is_control(vc, tc, c)) { |
|
con_flush(vc, &draw); |
|
do_con_trol(tty, vc, orig); |
|
continue; |
|
} |
|
|
|
if (vc_con_write_normal(vc, tc, c, &draw) < 0) |
|
continue; |
|
|
|
if (rescan) |
|
goto rescan_last_byte; |
|
} |
|
con_flush(vc, &draw); |
|
vc_uniscr_debug_check(vc); |
|
console_conditional_schedule(); |
|
notify_update(vc); |
|
console_unlock(); |
|
return n; |
|
} |
|
|
|
/* |
|
* 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_lock. |
|
*/ |
|
static void console_callback(struct work_struct *ignored) |
|
{ |
|
console_lock(); |
|
|
|
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->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); |
|
|
|
console_unlock(); |
|
} |
|
|
|
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 start_x, cnt; |
|
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; |
|
|
|
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) |
|
goto quit; |
|
|
|
/* undraw cursor first */ |
|
if (con_is_fg(vc)) |
|
hide_cursor(vc); |
|
|
|
start = (ushort *)vc->vc_pos; |
|
start_x = vc->state.x; |
|
cnt = 0; |
|
while (count--) { |
|
c = *b++; |
|
if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { |
|
if (cnt && con_is_visible(vc)) |
|
vc->vc_sw->con_putcs(vc, start, cnt, vc->state.y, start_x); |
|
cnt = 0; |
|
if (c == 8) { /* backspace */ |
|
bs(vc); |
|
start = (ushort *)vc->vc_pos; |
|
start_x = vc->state.x; |
|
continue; |
|
} |
|
if (c != 13) |
|
lf(vc); |
|
cr(vc); |
|
start = (ushort *)vc->vc_pos; |
|
start_x = vc->state.x; |
|
if (c == 10 || c == 13) |
|
continue; |
|
} |
|
vc_uniscr_putc(vc, c); |
|
scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); |
|
notify_write(vc, c); |
|
cnt++; |
|
if (vc->state.x == vc->vc_cols - 1) { |
|
vc->vc_need_wrap = 1; |
|
} else { |
|
vc->vc_pos += 2; |
|
vc->state.x++; |
|
} |
|
} |
|
if (cnt && con_is_visible(vc)) |
|
vc->vc_sw->con_putcs(vc, start, cnt, vc->state.y, start_x); |
|
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_lock();. |
|
* |
|
* 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_user 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: |
|
ret = set_selection_user((struct tiocl_selection |
|
__user *)(p+1), tty); |
|
break; |
|
case TIOCL_PASTESEL: |
|
ret = paste_selection(tty); |
|
break; |
|
case TIOCL_UNBLANKSCREEN: |
|
console_lock(); |
|
unblank_screen(); |
|
console_unlock(); |
|
break; |
|
case TIOCL_SELLOADLUT: |
|
console_lock(); |
|
ret = sel_loadlut(p); |
|
console_unlock(); |
|
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 = vt_get_shift_state(); |
|
ret = put_user(data, p); |
|
break; |
|
case TIOCL_GETMOUSEREPORTING: |
|
console_lock(); /* May be overkill */ |
|
data = mouse_reporting(); |
|
console_unlock(); |
|
ret = put_user(data, p); |
|
break; |
|
case TIOCL_SETVESABLANK: |
|
console_lock(); |
|
ret = set_vesa_blanking(p); |
|
console_unlock(); |
|
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: |
|
/* No locking needed as this is a transiently |
|
correct return anyway if the caller hasn't |
|
disabled switching */ |
|
ret = fg_console; |
|
break; |
|
case TIOCL_SCROLLCONSOLE: |
|
if (get_user(lines, (s32 __user *)(p+4))) { |
|
ret = -EFAULT; |
|
} else { |
|
/* Need the console lock here. Note that lots |
|
of other calls need fixing before the lock |
|
is actually useful ! */ |
|
console_lock(); |
|
scrollfront(vc_cons[fg_console].d, lines); |
|
console_unlock(); |
|
ret = 0; |
|
} |
|
break; |
|
case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ |
|
console_lock(); |
|
ignore_poke = 1; |
|
do_blank_screen(0); |
|
console_unlock(); |
|
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; |
|
vt_kbd_con_stop(console_num); |
|
} |
|
|
|
/* |
|
* 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; |
|
vt_kbd_con_start(console_num); |
|
} |
|
|
|
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 */ |
|
console_lock(); |
|
vc = tty->driver_data; |
|
if (vc) |
|
set_cursor(vc); |
|
console_unlock(); |
|
} |
|
|
|
/* |
|
* Allocate the console screen memory. |
|
*/ |
|
static int con_install(struct tty_driver *driver, struct tty_struct *tty) |
|
{ |
|
unsigned int currcons = tty->index; |
|
struct vc_data *vc; |
|
int ret; |
|
|
|
console_lock(); |
|
ret = vc_allocate(currcons); |
|
if (ret) |
|
goto unlock; |
|
|
|
vc = vc_cons[currcons].d; |
|
|
|
/* Still being freed */ |
|
if (vc->port.tty) { |
|
ret = -ERESTARTSYS; |
|
goto unlock; |
|
} |
|
|
|
ret = tty_port_install(&vc->port, driver, tty); |
|
if (ret) |
|
goto unlock; |
|
|
|
tty->driver_data = vc; |
|
vc->port.tty = tty; |
|
tty_port_get(&vc->port); |
|
|
|
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; |
|
unlock: |
|
console_unlock(); |
|
return ret; |
|
} |
|
|
|
static int con_open(struct tty_struct *tty, struct file *filp) |
|
{ |
|
/* everything done in install */ |
|
return 0; |
|
} |
|
|
|
|
|
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); |
|
console_lock(); |
|
vc->port.tty = NULL; |
|
console_unlock(); |
|
} |
|
|
|
static void con_cleanup(struct tty_struct *tty) |
|
{ |
|
struct vc_data *vc = tty->driver_data; |
|
|
|
tty_port_put(&vc->port); |
|
} |
|
|
|
static int default_color = 7; /* white */ |
|
static int default_italic_color = 2; // green (ASCII) |
|
static int default_underline_color = 3; // cyan (ASCII) |
|
module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); |
|
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 = default_color; |
|
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; |
|
|
|
console_lock(); |
|
|
|
if (!conswitchp) |
|
conswitchp = &dummy_con; |
|
display_desc = conswitchp->con_startup(); |
|
if (!display_desc) { |
|
fg_console = 0; |
|
console_unlock(); |
|
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); |
|
/* Assuming vc->vc_{cols,rows,screenbuf_size} are sane here. */ |
|
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->state.x, vc->state.y); |
|
csi_J(vc, 0); |
|
update_screen(vc); |
|
pr_info("Console: %s %s %dx%d\n", |
|
vc->vc_can_do_color ? "colour" : "mono", |
|
display_desc, vc->vc_cols, vc->vc_rows); |
|
printable = 1; |
|
|
|
console_unlock(); |
|
|
|
#ifdef CONFIG_VT_CONSOLE |
|
register_console(&vt_console_driver); |
|
#endif |
|
return 0; |
|
} |
|
console_initcall(con_init); |
|
|
|
static const struct tty_operations con_ops = { |
|
.install = con_install, |
|
.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, |
|
.cleanup = con_cleanup, |
|
}; |
|
|
|
static struct cdev vc0_cdev; |
|
|
|
static ssize_t show_tty_active(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "tty%d\n", fg_console + 1); |
|
} |
|
static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); |
|
|
|
static struct attribute *vt_dev_attrs[] = { |
|
&dev_attr_active.attr, |
|
NULL |
|
}; |
|
|
|
ATTRIBUTE_GROUPS(vt_dev); |
|
|
|
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"); |
|
tty0dev = device_create_with_groups(tty_class, NULL, |
|
MKDEV(TTY_MAJOR, 0), NULL, |
|
vt_dev_groups, "tty0"); |
|
if (IS_ERR(tty0dev)) |
|
tty0dev = NULL; |
|
|
|
vcs_init(); |
|
|
|
console_driver = alloc_tty_driver(MAX_NR_CONSOLES); |
|
if (!console_driver) |
|
panic("Couldn't allocate console driver\n"); |
|
|
|
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 do_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; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
/* 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); |
|
} |
|
|
|
pr_info("Console: switching "); |
|
if (!deflt) |
|
pr_cont("consoles %d-%d ", first + 1, last + 1); |
|
if (j >= 0) { |
|
struct vc_data *vc = vc_cons[j].d; |
|
|
|
pr_cont("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 { |
|
pr_cont("to %s\n", desc); |
|
} |
|
|
|
retval = 0; |
|
err: |
|
module_put(owner); |
|
return retval; |
|
}; |
|
|
|
|
|
#ifdef CONFIG_VT_HW_CONSOLE_BINDING |
|
int do_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; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
/* 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) |
|
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->con != csw) { |
|
defcsw = con_back->con; |
|
retval = 0; |
|
break; |
|
} |
|
} |
|
|
|
if (retval) |
|
goto err; |
|
|
|
if (!con_is_bound(csw)) |
|
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; |
|
|
|
/* ignore return value, binding should not fail */ |
|
do_bind_con_driver(defcsw, first, last, deflt); |
|
err: |
|
module_put(owner); |
|
return retval; |
|
|
|
} |
|
EXPORT_SYMBOL_GPL(do_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)) |
|
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) |
|
do_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; |
|
int ret; |
|
|
|
if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) |
|
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) { |
|
ret = do_unbind_con_driver(csw, first, last, deflt); |
|
if (ret != 0) |
|
return ret; |
|
} |
|
|
|
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); |
|
|
|
console_lock(); |
|
|
|
if (bind) |
|
vt_bind(con); |
|
else |
|
vt_unbind(con); |
|
|
|
console_unlock(); |
|
|
|
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; |
|
|
|
console_lock(); |
|
bind = con_is_bound(con->con); |
|
console_unlock(); |
|
|
|
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 DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind); |
|
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
|
|
|
static struct attribute *con_dev_attrs[] = { |
|
&dev_attr_bind.attr, |
|
&dev_attr_name.attr, |
|
NULL |
|
}; |
|
|
|
ATTRIBUTE_GROUPS(con_dev); |
|
|
|
static int vtconsole_init_device(struct con_driver *con) |
|
{ |
|
con->flag |= CON_DRIVER_FLAG_ATTR; |
|
return 0; |
|
} |
|
|
|
static void vtconsole_deinit_device(struct con_driver *con) |
|
{ |
|
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; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
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_is_visible - checks whether the current console is visible |
|
* @vc: virtual console |
|
* |
|
* RETURNS: zero if not visible, nonzero if visible |
|
*/ |
|
bool con_is_visible(const struct vc_data *vc) |
|
{ |
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
return *vc->vc_display_fg == vc; |
|
} |
|
EXPORT_SYMBOL(con_is_visible); |
|
|
|
/** |
|
* con_debug_enter - prepare the console for the kernel debugger |
|
* @vc: virtual console |
|
* |
|
* 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); |
|
} |
|
} |
|
if (vc->vc_cols < 999) { |
|
int colcount; |
|
char cols[4]; |
|
const char *setargs[3] = { |
|
"set", |
|
"COLUMNS", |
|
cols, |
|
}; |
|
if (kdbgetintenv(setargs[0], &colcount)) { |
|
snprintf(cols, 4, "%i", vc->vc_cols); |
|
kdb_set(2, setargs); |
|
} |
|
} |
|
#endif /* CONFIG_KGDB_KDB */ |
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(con_debug_enter); |
|
|
|
/** |
|
* con_debug_leave - restore console state |
|
* |
|
* 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); |
|
|
|
static int do_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; |
|
|
|
WARN_CONSOLE_UNLOCKED(); |
|
|
|
if (!try_module_get(owner)) |
|
return -ENODEV; |
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
|
con_driver = ®istered_con_driver[i]; |
|
|
|
/* already registered */ |
|
if (con_driver->con == csw) { |
|
retval = -EBUSY; |
|
goto err; |
|
} |
|
} |
|
|
|
desc = csw->con_startup(); |
|
if (!desc) { |
|
retval = -ENODEV; |
|
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->flag & CON_DRIVER_FLAG_ZOMBIE)) { |
|
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_with_groups(vtconsole_class, NULL, |
|
MKDEV(0, con_driver->node), |
|
con_driver, con_dev_groups, |
|
"vtcon%i", con_driver->node); |
|
if (IS_ERR(con_driver->dev)) { |
|
pr_warn("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: |
|
module_put(owner); |
|
return retval; |
|
} |
|
|
|
|
|
/** |
|
* do_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 do_unregister_con_driver(const struct consw *csw) |
|
{ |
|
int i; |
|
|
|
/* cannot unregister a bound driver */ |
|
if (con_is_bound(csw)) |
|
return -EBUSY; |
|
|
|
if (csw == conswitchp) |
|
return -EINVAL; |
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
|
struct con_driver *con_driver = ®istered_con_driver[i]; |
|
|
|
if (con_driver->con == csw) { |
|
/* |
|
* Defer the removal of the sysfs entries since that |
|
* will acquire the kernfs s_active lock and we can't |
|
* acquire this lock while holding the console lock: |
|
* the unbind sysfs entry imposes already the opposite |
|
* order. Reset con already here to prevent any later |
|
* lookup to succeed and mark this slot as zombie, so |
|
* it won't get reused until we complete the removal |
|
* in the deferred work. |
|
*/ |
|
con_driver->con = NULL; |
|
con_driver->flag = CON_DRIVER_FLAG_ZOMBIE; |
|
schedule_work(&con_driver_unregister_work); |
|
|
|
return 0; |
|
} |
|
} |
|
|
|
return -ENODEV; |
|
} |
|
EXPORT_SYMBOL_GPL(do_unregister_con_driver); |
|
|
|
static void con_driver_unregister_callback(struct work_struct *ignored) |
|
{ |
|
int i; |
|
|
|
console_lock(); |
|
|
|
for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
|
struct con_driver *con_driver = ®istered_con_driver[i]; |
|
|
|
if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) |
|
continue; |
|
|
|
console_unlock(); |
|
|
|
vtconsole_deinit_device(con_driver); |
|
device_destroy(vtconsole_class, MKDEV(0, con_driver->node)); |
|
|
|
console_lock(); |
|
|
|
if (WARN_ON_ONCE(con_driver->con)) |
|
con_driver->con = NULL; |
|
con_driver->desc = NULL; |
|
con_driver->dev = NULL; |
|
con_driver->node = 0; |
|
WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE); |
|
con_driver->flag = 0; |
|
con_driver->first = 0; |
|
con_driver->last = 0; |
|
} |
|
|
|
console_unlock(); |
|
} |
|
|
|
/* |
|
* 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. |
|
* |
|
* do_take_over_console is basically a register followed by bind |
|
*/ |
|
int do_take_over_console(const struct consw *csw, int first, int last, int deflt) |
|
{ |
|
int err; |
|
|
|
err = do_register_con_driver(csw, first, last); |
|
/* |
|
* If we get an busy error we still want to bind the console driver |
|
* and return success, as we may have unbound the console driver |
|
* but not unregistered it. |
|
*/ |
|
if (err == -EBUSY) |
|
err = 0; |
|
if (!err) |
|
do_bind_con_driver(csw, first, last, deflt); |
|
|
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(do_take_over_console); |
|
|
|
|
|
/* |
|
* 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) |
|
{ |
|
console_lock(); |
|
do_unregister_con_driver(csw); |
|
console_unlock(); |
|
} |
|
|
|
static int __init vtconsole_class_init(void) |
|
{ |
|
int i; |
|
|
|
vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
|
if (IS_ERR(vtconsole_class)) { |
|
pr_warn("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_with_groups(vtconsole_class, NULL, |
|
MKDEV(0, con->node), |
|
con, con_dev_groups, |
|
"vtcon%i", con->node); |
|
|
|
if (IS_ERR(con->dev)) { |
|
pr_warn("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; |
|
|
|
might_sleep(); |
|
|
|
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; |
|
} |
|
|
|
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 */ |
|
pr_warn("unblank_screen: tty %d not allocated ??\n", |
|
fg_console + 1); |
|
return; |
|
} |
|
vc = vc_cons[fg_console].d; |
|
if (vc->vc_mode != KD_TEXT) |
|
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)) |
|
/* 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(struct timer_list *unused) |
|
{ |
|
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->vc_sw->con_set_palette(vc, color_table); |
|
} |
|
|
|
/* |
|
* 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 i, j, k; |
|
unsigned char colormap[3*16]; |
|
|
|
if (copy_from_user(colormap, arg, sizeof(colormap))) |
|
return -EFAULT; |
|
|
|
console_lock(); |
|
for (i = k = 0; i < 16; i++) { |
|
default_red[i] = colormap[k++]; |
|
default_grn[i] = colormap[k++]; |
|
default_blu[i] = colormap[k++]; |
|
} |
|
for (i = 0; i < MAX_NR_CONSOLES; i++) { |
|
if (!vc_cons_allocated(i)) |
|
continue; |
|
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); |
|
} |
|
console_unlock(); |
|
|
|
return 0; |
|
} |
|
|
|
int con_get_cmap(unsigned char __user *arg) |
|
{ |
|
int i, k; |
|
unsigned char colormap[3*16]; |
|
|
|
console_lock(); |
|
for (i = k = 0; i < 16; i++) { |
|
colormap[k++] = default_red[i]; |
|
colormap[k++] = default_grn[i]; |
|
colormap[k++] = default_blu[i]; |
|
} |
|
console_unlock(); |
|
|
|
if (copy_to_user(arg, colormap, sizeof(colormap))) |
|
return -EFAULT; |
|
|
|
return 0; |
|
} |
|
|
|
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 up to 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 (op->data) { |
|
font.data = kmalloc(max_font_size, GFP_KERNEL); |
|
if (!font.data) |
|
return -ENOMEM; |
|
} else |
|
font.data = NULL; |
|
|
|
console_lock(); |
|
if (vc->vc_mode != KD_TEXT) |
|
rc = -EINVAL; |
|
else if (vc->vc_sw->con_font_get) |
|
rc = vc->vc_sw->con_font_get(vc, &font); |
|
else |
|
rc = -ENOSYS; |
|
console_unlock(); |
|
|
|
if (rc) |
|
goto out; |
|
|
|
c = (font.width+7)/8 * 32 * font.charcount; |
|
|
|
if (op->data && font.charcount > op->charcount) |
|
rc = -ENOSPC; |
|
if (font.width > op->width || font.height > op->height) |
|
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->width <= 0 || op->width > 32 || !op->height || op->height > 32) |
|
return -EINVAL; |
|
size = (op->width+7)/8 * 32 * op->charcount; |
|
if (size > max_font_size) |
|
return -ENOSPC; |
|
|
|
font.data = memdup_user(op->data, size); |
|
if (IS_ERR(font.data)) |
|
return PTR_ERR(font.data); |
|
|
|
font.charcount = op->charcount; |
|
font.width = op->width; |
|
font.height = op->height; |
|
|
|
console_lock(); |
|
if (vc->vc_mode != KD_TEXT) |
|
rc = -EINVAL; |
|
else if (vc->vc_sw->con_font_set) |
|
rc = vc->vc_sw->con_font_set(vc, &font, op->flags); |
|
else |
|
rc = -ENOSYS; |
|
console_unlock(); |
|
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 (!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; |
|
|
|
console_lock(); |
|
if (vc->vc_mode != KD_TEXT) { |
|
console_unlock(); |
|
return -EINVAL; |
|
} |
|
if (vc->vc_sw->con_font_default) |
|
rc = vc->vc_sw->con_font_default(vc, &font, s); |
|
else |
|
rc = -ENOSYS; |
|
console_unlock(); |
|
if (!rc) { |
|
op->width = font.width; |
|
op->height = font.height; |
|
} |
|
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: |
|
/* was buggy and never really used */ |
|
return -EINVAL; |
|
} |
|
return -ENOSYS; |
|
} |
|
|
|
/* |
|
* Interface exported to selection and vcs. |
|
*/ |
|
|
|
/* used by selection */ |
|
u16 screen_glyph(const struct vc_data *vc, int offset) |
|
{ |
|
u16 w = scr_readw(screenpos(vc, offset, true)); |
|
u16 c = w & 0xff; |
|
|
|
if (w & vc->vc_hi_font_mask) |
|
c |= 0x100; |
|
return c; |
|
} |
|
EXPORT_SYMBOL_GPL(screen_glyph); |
|
|
|
u32 screen_glyph_unicode(const struct vc_data *vc, int n) |
|
{ |
|
struct uni_screen *uniscr = get_vc_uniscr(vc); |
|
|
|
if (uniscr) |
|
return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols]; |
|
return inverse_translate(vc, screen_glyph(vc, n * 2), 1); |
|
} |
|
EXPORT_SYMBOL_GPL(screen_glyph_unicode); |
|
|
|
/* used by vcs - note the word offset */ |
|
unsigned short *screen_pos(const struct vc_data *vc, int w_offset, bool viewed) |
|
{ |
|
return screenpos(vc, 2 * w_offset, viewed); |
|
} |
|
EXPORT_SYMBOL_GPL(screen_pos); |
|
|
|
void getconsxy(const struct vc_data *vc, unsigned char xy[static 2]) |
|
{ |
|
/* clamp values if they don't fit */ |
|
xy[0] = min(vc->state.x, 0xFFu); |
|
xy[1] = min(vc->state.y, 0xFFu); |
|
} |
|
|
|
void putconsxy(struct vc_data *vc, unsigned char xy[static const 2]) |
|
{ |
|
hide_cursor(vc); |
|
gotoxy(vc, xy[0], xy[1]); |
|
set_cursor(vc); |
|
} |
|
|
|
u16 vcs_scr_readw(const 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); |
|
} |
|
|
|
void vc_scrolldelta_helper(struct vc_data *c, int lines, |
|
unsigned int rolled_over, void *base, unsigned int size) |
|
{ |
|
unsigned long ubase = (unsigned long)base; |
|
ptrdiff_t scr_end = (void *)c->vc_scr_end - base; |
|
ptrdiff_t vorigin = (void *)c->vc_visible_origin - base; |
|
ptrdiff_t origin = (void *)c->vc_origin - base; |
|
int margin = c->vc_size_row * 4; |
|
int from, wrap, from_off, avail; |
|
|
|
/* Turn scrollback off */ |
|
if (!lines) { |
|
c->vc_visible_origin = c->vc_origin; |
|
return; |
|
} |
|
|
|
/* Do we have already enough to allow jumping from 0 to the end? */ |
|
if (rolled_over > scr_end + margin) { |
|
from = scr_end; |
|
wrap = rolled_over + c->vc_size_row; |
|
} else { |
|
from = 0; |
|
wrap = size; |
|
} |
|
|
|
from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row; |
|
avail = (origin - from + wrap) % wrap; |
|
|
|
/* Only a little piece would be left? Show all incl. the piece! */ |
|
if (avail < 2 * margin) |
|
margin = 0; |
|
if (from_off < margin) |
|
from_off = 0; |
|
if (from_off > avail - margin) |
|
from_off = avail; |
|
|
|
c->vc_visible_origin = ubase + (from + from_off) % wrap; |
|
} |
|
EXPORT_SYMBOL_GPL(vc_scrolldelta_helper); |
|
|
|
/* |
|
* 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(give_up_console); |
|
#endif
|
|
|