include/linux/vt_kern.h

   1 #ifndef _VT_KERN_H
   2 #define _VT_KERN_H
   3
   4 /*
   5  * this really is an extension of the vc_cons structure in console.c, but
   6  * with information needed by the vt package
   7  */
   8
   9 #include <linux/vt.h>
  10 #include <linux/kd.h>
  11 #include <linux/tty.h>
  12 #include <linux/mutex.h>
  13 #include <linux/console_struct.h>
  14 #include <linux/mm.h>
  15 #include <linux/consolemap.h>
  16
  17 /*
  18  * Presently, a lot of graphics programs do not restore the contents of
  19  * the higher font pages.  Defining this flag will avoid use of them, but
  20  * will lose support for PIO_FONTRESET.  Note that many font operations are
  21  * not likely to work with these programs anyway; they need to be
  22  * fixed.  The linux/Documentation directory includes a code snippet
  23  * to save and restore the text font.
  24  */
  25 #ifdef CONFIG_VGA_CONSOLE
  26 #define BROKEN_GRAPHICS_PROGRAMS 1
  27 #endif
  28
  29 extern void kd_mksound(unsigned int hz, unsigned int ticks);
  30 extern int kbd_rate(struct kbd_repeat *rep);
  31 extern int fg_console, last_console, want_console;
  32
  33 /* console.c */
  34
  35 int vc_allocate(unsigned int console);
  36 int vc_cons_allocated(unsigned int console);
  37 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
  38 void vc_deallocate(unsigned int console);
  39 void reset_palette(struct vc_data *vc);
  40 void do_blank_screen(int entering_gfx);
  41 void do_unblank_screen(int leaving_gfx);
  42 void unblank_screen(void);
  43 void poke_blanked_console(void);
  44 int con_font_op(struct vc_data *vc, struct console_font_op *op);
  45 int con_set_cmap(unsigned char __user *cmap);
  46 int con_get_cmap(unsigned char __user *cmap);
  47 void scrollback(struct vc_data *vc, int lines);
  48 void scrollfront(struct vc_data *vc, int lines);
  49 void update_region(struct vc_data *vc, unsigned long start, int count);
  50 void redraw_screen(struct vc_data *vc, int is_switch);
  51 #define update_screen(x) redraw_screen(x, 0)
  52 #define switch_screen(x) redraw_screen(x, 1)
  53
  54 struct tty_struct;
  55 int tioclinux(struct tty_struct *tty, unsigned long arg);
  56
  57 #ifdef CONFIG_CONSOLE_TRANSLATIONS
  58 /* consolemap.c */
  59
  60 struct unimapinit;
  61 struct unipair;
  62
  63 int con_set_trans_old(unsigned char __user * table);
  64 int con_get_trans_old(unsigned char __user * table);
  65 int con_set_trans_new(unsigned short __user * table);
  66 int con_get_trans_new(unsigned short __user * table);
  67 int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui);
  68 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
  69 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
  70 int con_set_default_unimap(struct vc_data *vc);
  71 void con_free_unimap(struct vc_data *vc);
  72 void con_protect_unimap(struct vc_data *vc, int rdonly);
  73 int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
  74
  75 #define vc_translate(vc, c) ((vc)->vc_translate[(c) |                   \
  76                                         ((vc)->vc_toggle_meta ? 0x80 : 0)])
  77 #else
  78 #define con_set_trans_old(arg) (0)
  79 #define con_get_trans_old(arg) (-EINVAL)
  80 #define con_set_trans_new(arg) (0)
  81 #define con_get_trans_new(arg) (-EINVAL)
  82 #define con_clear_unimap(vc, ui) (0)
  83 #define con_set_unimap(vc, ct, list) (0)
  84 #define con_set_default_unimap(vc) (0)
  85 #define con_copy_unimap(d, s) (0)
  86 #define con_get_unimap(vc, ct, uct, list) (-EINVAL)
  87 #define con_free_unimap(vc) do { ; } while (0)
  88 #define con_protect_unimap(vc, rdonly) do { ; } while (0)
  89
  90 #define vc_translate(vc, c) (c)
  91 #endif
  92
  93 /* vt.c */
  94 int vt_waitactive(int vt);
  95 void change_console(struct vc_data *new_vc);
  96 void reset_vc(struct vc_data *vc);
  97 extern int unbind_con_driver(const struct consw *csw, int first, int last,
  98                              int deflt);
  99 int vty_init(void);
 100
 101 /*
 102  * vc_screen.c shares this temporary buffer with the console write code so that
 103  * we can easily avoid touching user space while holding the console spinlock.
 104  */
 105
 106 #define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE)
 107 extern char con_buf[CON_BUF_SIZE];
 108 extern struct mutex con_buf_mtx;
 109 extern char vt_dont_switch;
 110 extern int default_utf8;
 111
 112 struct vt_spawn_console {
 113         spinlock_t lock;
 114         struct pid *pid;
 115         int sig;
 116 };
 117 extern struct vt_spawn_console vt_spawn_con;
 118
 119 #endif /* _VT_KERN_H */