cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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console.h (7351B)


      1/*
      2 *  linux/include/linux/console.h
      3 *
      4 *  Copyright (C) 1993        Hamish Macdonald
      5 *
      6 * This file is subject to the terms and conditions of the GNU General Public
      7 * License.  See the file COPYING in the main directory of this archive
      8 * for more details.
      9 *
     10 * Changed:
     11 * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX
     12 */
     13
     14#ifndef _LINUX_CONSOLE_H_
     15#define _LINUX_CONSOLE_H_ 1
     16
     17#include <linux/atomic.h>
     18#include <linux/types.h>
     19
     20struct vc_data;
     21struct console_font_op;
     22struct console_font;
     23struct module;
     24struct tty_struct;
     25struct notifier_block;
     26
     27enum con_scroll {
     28	SM_UP,
     29	SM_DOWN,
     30};
     31
     32enum vc_intensity;
     33
     34/**
     35 * struct consw - callbacks for consoles
     36 *
     37 * @con_scroll: move lines from @top to @bottom in direction @dir by @lines.
     38 *		Return true if no generic handling should be done.
     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.
     42 *		     Invoked by user. (optional)
     43 */
     44struct consw {
     45	struct module *owner;
     46	const char *(*con_startup)(void);
     47	void	(*con_init)(struct vc_data *vc, int init);
     48	void	(*con_deinit)(struct vc_data *vc);
     49	void	(*con_clear)(struct vc_data *vc, int sy, int sx, int height,
     50			int width);
     51	void	(*con_putc)(struct vc_data *vc, int c, int ypos, int xpos);
     52	void	(*con_putcs)(struct vc_data *vc, const unsigned short *s,
     53			int count, int ypos, int xpos);
     54	void	(*con_cursor)(struct vc_data *vc, int mode);
     55	bool	(*con_scroll)(struct vc_data *vc, unsigned int top,
     56			unsigned int bottom, enum con_scroll dir,
     57			unsigned int lines);
     58	int	(*con_switch)(struct vc_data *vc);
     59	int	(*con_blank)(struct vc_data *vc, int blank, int mode_switch);
     60	int	(*con_font_set)(struct vc_data *vc, struct console_font *font,
     61			unsigned int flags);
     62	int	(*con_font_get)(struct vc_data *vc, struct console_font *font);
     63	int	(*con_font_default)(struct vc_data *vc,
     64			struct console_font *font, char *name);
     65	int     (*con_resize)(struct vc_data *vc, unsigned int width,
     66			unsigned int height, unsigned int user);
     67	void	(*con_set_palette)(struct vc_data *vc,
     68			const unsigned char *table);
     69	void	(*con_scrolldelta)(struct vc_data *vc, int lines);
     70	int	(*con_set_origin)(struct vc_data *vc);
     71	void	(*con_save_screen)(struct vc_data *vc);
     72	u8	(*con_build_attr)(struct vc_data *vc, u8 color,
     73			enum vc_intensity intensity,
     74			bool blink, bool underline, bool reverse, bool italic);
     75	void	(*con_invert_region)(struct vc_data *vc, u16 *p, int count);
     76	u16    *(*con_screen_pos)(const struct vc_data *vc, int offset);
     77	unsigned long (*con_getxy)(struct vc_data *vc, unsigned long position,
     78			int *px, int *py);
     79	/*
     80	 * Flush the video console driver's scrollback buffer
     81	 */
     82	void	(*con_flush_scrollback)(struct vc_data *vc);
     83	/*
     84	 * Prepare the console for the debugger.  This includes, but is not
     85	 * limited to, unblanking the console, loading an appropriate
     86	 * palette, and allowing debugger generated output.
     87	 */
     88	int	(*con_debug_enter)(struct vc_data *vc);
     89	/*
     90	 * Restore the console to its pre-debug state as closely as possible.
     91	 */
     92	int	(*con_debug_leave)(struct vc_data *vc);
     93};
     94
     95extern const struct consw *conswitchp;
     96
     97extern const struct consw dummy_con;	/* dummy console buffer */
     98extern const struct consw vga_con;	/* VGA text console */
     99extern const struct consw newport_con;	/* SGI Newport console  */
    100
    101int con_is_bound(const struct consw *csw);
    102int do_unregister_con_driver(const struct consw *csw);
    103int do_take_over_console(const struct consw *sw, int first, int last, int deflt);
    104void give_up_console(const struct consw *sw);
    105#ifdef CONFIG_HW_CONSOLE
    106int con_debug_enter(struct vc_data *vc);
    107int con_debug_leave(void);
    108#else
    109static inline int con_debug_enter(struct vc_data *vc)
    110{
    111	return 0;
    112}
    113static inline int con_debug_leave(void)
    114{
    115	return 0;
    116}
    117#endif
    118
    119/* cursor */
    120#define CM_DRAW     (1)
    121#define CM_ERASE    (2)
    122#define CM_MOVE     (3)
    123
    124/*
    125 * The interface for a console, or any other device that wants to capture
    126 * console messages (printer driver?)
    127 *
    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.
    130 */
    131
    132#define CON_PRINTBUFFER	(1)
    133#define CON_CONSDEV	(2) /* Preferred console, /dev/console */
    134#define CON_ENABLED	(4)
    135#define CON_BOOT	(8)
    136#define CON_ANYTIME	(16) /* Safe to call when cpu is offline */
    137#define CON_BRL		(32) /* Used for a braille device */
    138#define CON_EXTENDED	(64) /* Use the extended output format a la /dev/kmsg */
    139
    140struct console {
    141	char	name[16];
    142	void	(*write)(struct console *, const char *, unsigned);
    143	int	(*read)(struct console *, char *, unsigned);
    144	struct tty_driver *(*device)(struct console *, int *);
    145	void	(*unblank)(void);
    146	int	(*setup)(struct console *, char *);
    147	int	(*exit)(struct console *);
    148	int	(*match)(struct console *, char *name, int idx, char *options);
    149	short	flags;
    150	short	index;
    151	int	cflag;
    152	uint	ispeed;
    153	uint	ospeed;
    154	u64	seq;
    155	unsigned long dropped;
    156	void	*data;
    157	struct	 console *next;
    158};
    159
    160/*
    161 * for_each_console() allows you to iterate on each console
    162 */
    163#define for_each_console(con) \
    164	for (con = console_drivers; con != NULL; con = con->next)
    165
    166extern int console_set_on_cmdline;
    167extern struct console *early_console;
    168
    169enum con_flush_mode {
    170	CONSOLE_FLUSH_PENDING,
    171	CONSOLE_REPLAY_ALL,
    172};
    173
    174extern int add_preferred_console(char *name, int idx, char *options);
    175extern void register_console(struct console *);
    176extern int unregister_console(struct console *);
    177extern struct console *console_drivers;
    178extern void console_lock(void);
    179extern int console_trylock(void);
    180extern void console_unlock(void);
    181extern void console_conditional_schedule(void);
    182extern void console_unblank(void);
    183extern void console_flush_on_panic(enum con_flush_mode mode);
    184extern struct tty_driver *console_device(int *);
    185extern void console_stop(struct console *);
    186extern void console_start(struct console *);
    187extern int is_console_locked(void);
    188extern int braille_register_console(struct console *, int index,
    189		char *console_options, char *braille_options);
    190extern int braille_unregister_console(struct console *);
    191#ifdef CONFIG_TTY
    192extern void console_sysfs_notify(void);
    193#else
    194static inline void console_sysfs_notify(void)
    195{ }
    196#endif
    197extern bool console_suspend_enabled;
    198
    199/* Suspend and resume console messages over PM events */
    200extern void suspend_console(void);
    201extern void resume_console(void);
    202
    203int mda_console_init(void);
    204
    205void vcs_make_sysfs(int index);
    206void vcs_remove_sysfs(int index);
    207
    208/* Some debug stub to catch some of the obvious races in the VT code */
    209#define WARN_CONSOLE_UNLOCKED()						\
    210	WARN_ON(!atomic_read(&ignore_console_lock_warning) &&		\
    211		!is_console_locked() && !oops_in_progress)
    212/*
    213 * Increment ignore_console_lock_warning if you need to quiet
    214 * WARN_CONSOLE_UNLOCKED() for debugging purposes.
    215 */
    216extern atomic_t ignore_console_lock_warning;
    217
    218/* VESA Blanking Levels */
    219#define VESA_NO_BLANKING        0
    220#define VESA_VSYNC_SUSPEND      1
    221#define VESA_HSYNC_SUSPEND      2
    222#define VESA_POWERDOWN          3
    223
    224extern void console_init(void);
    225
    226/* For deferred console takeover */
    227void dummycon_register_output_notifier(struct notifier_block *nb);
    228void dummycon_unregister_output_notifier(struct notifier_block *nb);
    229
    230#endif /* _LINUX_CONSOLE_H */