2  *  linux/include/linux/console.h
39  *		Invoked by csi_M and printing to the console.
40  * @con_set_palette: sets the palette of the console to @table (optional)
41  * @con_scrolldelta: the contents of the console should be scrolled by @lines.
80 	 * Flush the video console driver's scrollback buffer
84 	 * Prepare the console for the debugger.  This includes, but is not
85 	 * limited to, unblanking the console, loading an appropriate
90 	 * Restore the console to its pre-debug state as closely as possible.
97 extern const struct consw dummy_con;	/* dummy console buffer */
98 extern const struct consw vga_con;	/* VGA text console */
99 extern const struct consw newport_con;	/* SGI Newport console  */
125  * The interface for a console, or any other device that wants to capture
126  * console messages (printer driver?)
128  * If a console driver is marked CON_BOOT then it will be auto-unregistered
129  * when the first real console is registered.  This is for early-printk drivers.
133 #define CON_CONSDEV	(2) /* Preferred console, /dev/console */
140 struct console {  struct
142 	void	(*write)(struct console *, const char *, unsigned);  argument
143 	int	(*read)(struct console *, char *, unsigned);  argument
144 	struct tty_driver *(*device)(struct console *, int *);  argument
146 	int	(*setup)(struct console *, char *);  argument
147 	int	(*exit)(struct console *);  argument
148 	int	(*match)(struct console *, char *name, int idx, char *options);  argument
153 	struct	 console *next;  argument
157  * for_each_console() allows you to iterate on each console
163 extern struct console *early_console;
171 extern void register_console(struct console *);
172 extern int unregister_console(struct console *);
173 extern struct console *console_drivers;
181 extern void console_stop(struct console *);
182 extern void console_start(struct console *);
184 extern int braille_register_console(struct console *, int index,
186 extern int braille_unregister_console(struct console *);
195 /* Suspend and resume console messages over PM events */
228 /* For deferred console takeover */