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.
81 	 * Flush the video console driver's scrollback buffer
85 	 * Prepare the console for the debugger.  This includes, but is not
86 	 * limited to, unblanking the console, loading an appropriate
91 	 * Restore the console to its pre-debug state as closely as possible.
98 extern const struct consw dummy_con;	/* dummy console buffer */
99 extern const struct consw vga_con;	/* VGA text console */
100 extern const struct consw newport_con;	/* SGI Newport console  */
126  * The interface for a console, or any other device that wants to capture
127  * console messages (printer driver?)
129  * If a console driver is marked CON_BOOT then it will be auto-unregistered
130  * when the first real console is registered.  This is for early-printk drivers.
134 #define CON_CONSDEV	(2) /* Preferred console, /dev/console */
141 struct console {  struct
143 	void	(*write)(struct console *, const char *, unsigned);  argument
144 	int	(*read)(struct console *, char *, unsigned);  argument
145 	struct tty_driver *(*device)(struct console *, int *);  argument
147 	int	(*setup)(struct console *, char *);  argument
148 	int	(*exit)(struct console *);  argument
149 	int	(*match)(struct console *, char *name, int idx, char *options);  argument
154 	struct	 console *next;  argument
158  * for_each_console() allows you to iterate on each console
164 extern struct console *early_console;
172 extern void register_console(struct console *);
173 extern int unregister_console(struct console *);
174 extern struct console *console_drivers;
182 extern void console_stop(struct console *);
183 extern void console_start(struct console *);
185 extern int braille_register_console(struct console *, int index,
187 extern int braille_unregister_console(struct console *);
196 /* Suspend and resume console messages over PM events */
229 /* For deferred console takeover */