84B9AEB067BF149F8DFBD1E
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 *  linux/include/linux/console.h
 *
 *  Copyright (C) 1993        Hamish Macdonald
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 *
 * Changed:
 * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX
 */

#ifndef _LINUX_CONSOLE_H_
#define _LINUX_CONSOLE_H_ 1

#include <linux/atomic.h>
#include <linux/bits.h>
#include <linux/irq_work.h>
#include <linux/rculist.h>
#include <linux/rcuwait.h>
#include <linux/types.h>

struct vc_data;
struct console_font_op;
struct console_font;
struct module;
struct tty_struct;
struct notifier_block;

enum con_scroll {
	SM_UP,
	SM_DOWN,
};

enum vc_intensity;

/**
 * struct consw - callbacks for consoles
 *
 * @con_init:   initialize the console on @vc. @init is true for the very first
 *		call on this @vc.
 * @con_clear:  erase @count characters at [@x, @y] on @vc. @count >= 1.
 * @con_putc:   emit one character with attributes @ca to [@x, @y] on @vc.
 *		(optional -- @con_putcs would be called instead)
 * @con_putcs:  emit @count characters with attributes @s to [@x, @y] on @vc.
 * @con_cursor: enable/disable cursor depending on @enable
 * @con_scroll: move lines from @top to @bottom in direction @dir by @lines.
 *		Return true if no generic handling should be done.
 *		Invoked by csi_M and printing to the console.
 * @con_switch: notifier about the console switch; it is supposed to return
 *		true if a redraw is needed.
 * @con_set_palette: sets the palette of the console to @table (optional)
 * @con_scrolldelta: the contents of the console should be scrolled by @lines.
 *		     Invoked by user. (optional)
 * @con_set_origin: set origin (see &vc_data::vc_origin) of the @vc. If not
 *		provided or returns false, the origin is set to
 *		@vc->vc_screenbuf. (optional)
 */
struct consw {
	struct module *owner;
	const char *(*con_startup)(void);
	void	(*con_init)(struct vc_data *vc, bool init);
	void	(*con_deinit)(struct vc_data *vc);
	void	(*con_clear)(struct vc_data *vc, unsigned int y,
			     unsigned int x, unsigned int count);
	void	(*con_putc)(struct vc_data *vc, u16 ca, unsigned int y,
			    unsigned int x);
	void	(*con_putcs)(struct vc_data *vc, const u16 *s,
			     unsigned int count, unsigned int ypos,
			     unsigned int xpos);
	void	(*con_cursor)(struct vc_data *vc, bool enable);
	bool	(*con_scroll)(struct vc_data *vc, unsigned int top,
			unsigned int bottom, enum con_scroll dir,
			unsigned int lines);
	bool	(*con_switch)(struct vc_data *vc);
	int	(*con_blank)(struct vc_data *vc, int blank, int mode_switch);
	int	(*con_font_set)(struct vc_data *vc,
				const struct console_font *font,
				unsigned int vpitch, unsigned int flags);
	int	(*con_font_get)(struct vc_data *vc, struct console_font *font,
			unsigned int vpitch);
	int	(*con_font_default)(struct vc_data *vc,
			struct console_font *font, const char *name);
	int     (*con_resize)(struct vc_data *vc, unsigned int width,
			      unsigned int height, bool from_user);
	void	(*con_set_palette)(struct vc_data *vc,
			const unsigned char *table);
	void	(*con_scrolldelta)(struct vc_data *vc, int lines);
	bool	(*con_set_origin)(struct vc_data *vc);
	void	(*con_save_screen)(struct vc_data *vc);
	u8	(*con_build_attr)(struct vc_data *vc, u8 color,
			enum vc_intensity intensity,
			bool blink, bool underline, bool reverse, bool italic);
	void	(*con_invert_region)(struct vc_data *vc, u16 *p, int count);
	u16    *(*con_screen_pos)(const struct vc_data *vc, int offset);
	unsigned long (*con_getxy)(struct vc_data *vc, unsigned long position,
			int *px, int *py);
	/*
	 * Flush the video console driver's scrollback buffer
	 */
	void	(*con_flush_scrollback)(struct vc_data *vc);
	/*
	 * Prepare the console for the debugger.  This includes, but is not
	 * limited to, unblanking the console, loading an appropriate
	 * palette, and allowing debugger generated output.
	 */
	void	(*con_debug_enter)(struct v