/* * console_struct.h * * Data structure describing single virtual console except for data * used by vt.c. * * Fields marked with [#] must be set by the low-level driver. * Fields marked with [!] can be changed by the low-level driver * to achieve effects such as fast scrolling by changing the origin. */ #ifndef _LINUX_CONSOLE_STRUCT_H#define _LINUX_CONSOLE_STRUCT_H #include <linux/wait.h>#include <linux/vt.h>#include <linux/workqueue.h> struct vt_struct;struct uni_pagedir; #define NPAR 16 /* * Example: vc_data of a console that was scrolled 3 lines down. * *                              Console buffer * vc_screenbuf ---------> +----------------------+-. *                         | initializing W       |  \ *                         | initializing X       |   | *                         | initializing Y       |    > scroll-back area *                         | initializing Z       |   | *                         |                      |  / * vc_visible_origin ---> ^+----------------------+-: * (changes by scroll)    || Welcome to linux     |  \ *                        ||                      |   | *           vc_rows --->< | login: root          |   |  visible on console *                        || password:            |    > (vc_screenbuf_size is * vc_origin -----------> ||                      |   |   vc_size_row * vc_rows) * (start when no scroll) || Last login: 12:28    |  / *                        v+----------------------+-: *                         | Have a lot of fun... |  \ * vc_pos -----------------|--------v             |   > scroll-front area *                         | ~ # cat_             |  / * vc_scr_end -----------> +----------------------+-: * (vc_origin +            |                      |  \ EMPTY, to be filled by *  vc_screenbuf_size)     |                      |  / vc_video_erase_char *                         +----------------------+-' *                         <---- 2 * vc_cols -----> *                         <---- vc_size_row -----> * * Note that every character in the console buffer is accompanied with an * attribute in the buffer right after the character. This is not depicted * in the figure. */struct vc_data {	struct tty_port port;			/* Upper level data */ 	unsigned short	vc_num;			/* Console number */	unsigned int	vc_cols;		/* [#] Console size */	unsigned int	vc_rows;	unsigned int	vc_size_row;		/* Bytes per row */	unsigned int	vc_scan_lines;		/* # of scan lines */	unsigned long	vc_origin;		/* [!] Start of real screen */	unsigned long	vc_scr_end;		/* [!] End of real screen */	unsigned long	vc_visible_origin;	/* [!] Top of visible window */	unsigned int	vc_top, vc_bottom;	/* Scrolling region */	const struct consw *vc_sw;	unsigned short	*vc_screenbuf;		/* In-memory character/attribute buffer */	unsigned int	vc_screenbuf_size;	unsigned char	vc_mode;		/* KD_TEXT, ... */	/* attributes for all characters on screen */	unsigned char	vc_attr;		/* Current attributes */	unsigned char	vc_def_color;		/* Default colors */	unsigned char	vc_color;		/* Foreground & background */	unsigned char	vc_s_color;		/* Saved foreground & background */	unsigned char	vc_ulcolor;		/* Color for underline mode */	unsigned char   vc_itcolor;	unsigned char	vc_halfcolor;		/* Color for half intensity mode */	/* cursor */	unsigned int	vc_cursor_type;	unsigned short	vc_complement_mask;	/* [#] Xor mask for mouse pointer */	unsigned short	vc_s_complement_mask;	/* Saved mouse pointer mask */	unsigned int	vc_x, vc_y;		/* Cursor position */	unsigned int	vc_saved_x, vc_saved_y;	unsigned long	vc_pos;			/* Cursor address */	/* fonts */		unsigned short	vc_hi_font_mask;	/* [#] Attribute set for upper 256 chars of font or 0 if not supported */	struct console_font vc_font;		/* Current VC font set */	unsigned short	vc_video_erase_char;	/* Background erase character */	/* VT terminal data */	unsigned int	vc_state;		/* Escape sequence parser state */	unsigned int	vc_npar,vc_par[NPAR];	/* Parameters of current escape sequence */	/* data for manual vt switching */	struct vt_mode	vt_mode;	struct pid 	*vt_pid;	int		vt_newvt;	wait_queue_head_t paste_wait;	/* mode flags */	unsigned int	vc_charset	: 1;	/* Character set G0 / G1 */	unsigned int	vc_s_charset	: 1;	/* Saved character set */	unsigned int	vc_disp_ctrl	: 1;	/* Display chars < 32? */	unsigned int	vc_toggle_meta	: 1;	/* Toggle high bit? */	unsigned int	vc_decscnm	: 1;	/* Screen Mode */	unsigned int	vc_decom	: 1;	/* Origin Mode */	unsigned int	vc_decawm	: 1;	/* Autowrap Mode */	unsigned int	vc_deccm	: 1;	/* Cursor Visible */	unsigned int	vc_decim	: 1;	/* Insert Mode */	/* attribute flags */	unsigned int	vc_intensity	: 2;	/* 0=half-bright, 1=normal, 2=bold */	unsigned int    vc_italic:1;	unsigned int	vc_underline	: 1;	unsigned int	vc_blink	: 1;	unsigned int	vc_reverse	: 1;	unsigned int	vc_s_intensity	: 2;	/* saved rendition */	unsigned int    vc_s_italic:1;	unsigned int	vc_s_underline	: 1;	unsigned int	vc_s_blink	: 1;	unsigned int	vc_s_reverse	: 1;	/* misc */	unsigned int	vc_ques		: 1;	unsigned int	vc_need_wrap	: 1;	unsigned int	vc_can_do_color	: 1;	unsigned int	vc_report_mouse : 2;	unsigned char	vc_utf		: 1;	/* Unicode UTF-8 encoding */	unsigned char	vc_utf_count;		 int	vc_utf_char;	unsigned int	vc_tab_stop[8];		/* Tab stops. 256 columns. */	unsigned char   vc_palette[16*3];       /* Colour palette for VGA+ */	unsigned short * vc_translate;	unsigned char 	vc_G0_charset;	unsigned char 	vc_G1_charset;	unsigned char 	vc_saved_G0;	unsigned char 	vc_saved_G1;	unsigned int    vc_resize_user;         /* resize request from user */	unsigned int	vc_bell_pitch;		/* Console bell pitch */	unsigned int	vc_bell_duration;	/* Console bell duration */	unsigned short	vc_cur_blink_ms;	/* Cursor blink duration */	struct vc_data **vc_display_fg;		/* [!] Ptr to var holding fg console for this display */	struct uni_pagedir *vc_uni_pagedir;	struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */	bool vc_panic_force_write; /* when oops/panic this VC can accept forced output/blanking */	/* additional information is in vt_kern.h */}; struct vc {	struct vc_data *d;	struct work_struct SAK_work; 	/* might add  scrmem, vt_struct, kbd  at some time,	   to have everything in one place - the disadvantage	   would be that vc_cons etc can no longer be static */}; extern struct vc vc_cons [MAX_NR_CONSOLES];extern void vc_SAK(struct work_struct *work); #define CUR_DEF		0#define CUR_NONE	1#define CUR_UNDERLINE	2#define CUR_LOWER_THIRD	3#define CUR_LOWER_HALF	4#define CUR_TWO_THIRDS	5#define CUR_BLOCK	6#define CUR_HWMASK	0x0f#define CUR_SWMASK	0xfff0 #define CUR_DEFAULT CUR_UNDERLINE static inline bool con_is_visible(const struct vc_data *vc){	return *vc->vc_display_fg == vc;} #endif /* _LINUX_CONSOLE_STRUCT_H */