TTY之struct consw

/** * struct consw - callbacks for consoles * * @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) */struct consw { struct module *owner; const char *(*con_startup)(void); void (*con_init)(struct vc_data *, int); void (*con_deinit)(struct vc_data *); void (*con_clear)(struct vc_data *, int, int, int, int); void (*con_putc)(struct vc_data *, int, int, int); void (*con_putcs)(struct vc_data *, const unsigned short *, int, int, int); void (*con_cursor)(struct vc_data *, int); int (*con_scroll)(struct vc_data *, int, int, int, int); int (*con_switch)(struct vc_data *); int (*con_blank)(struct vc_data *, int, int); int (*con_font_set)(struct vc_data *, struct console_font *, unsigned); int (*con_font_get)(struct vc_data *, struct console_font *); int (*con_font_default)(struct vc_data *, struct console_font *, char *); int (*con_font_copy)(struct vc_data *, int); int     (*con_resize)(struct vc_data *, unsigned int, unsigned int,          unsigned int); void (*con_set_palette)(struct vc_data *,   const unsigned char *table); void (*con_scrolldelta)(struct vc_data *, int lines); int (*con_set_origin)(struct vc_data *); void (*con_save_screen)(struct vc_data *); u8 (*con_build_attr)(struct vc_data *, u8, u8, u8, u8, u8, u8); void (*con_invert_region)(struct vc_data *, u16 *, int); u16    *(*con_screen_pos)(struct vc_data *, int); unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *); /*  * 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.  */ int (*con_debug_enter)(struct vc_data *); /*  * Restore the console to its pre-debug state as closely as possible.  */ int (*con_debug_leave)(struct vc_data *);};