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 *); };