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 #include <linux/notifier.h>
  17
  18 /*
  19  * Presently, a lot of graphics programs do not restore the contents of
  20  * the higher font pages.  Defining this flag will avoid use of them, but
  21  * will lose support for PIO_FONTRESET.  Note that many font operations are
  22  * not likely to work with these programs anyway; they need to be
  23  * fixed.  The linux/Documentation directory includes a code snippet
  24  * to save and restore the text font.
  25  */
  26 #ifdef CONFIG_VGA_CONSOLE
  27 #define BROKEN_GRAPHICS_PROGRAMS 1
  28 #endif
  29
  30 extern void kd_mksound(unsigned int hz, unsigned int ticks);
  31 extern int kbd_rate(struct kbd_repeat *rep);
  32 extern int fg_console, last_console, want_console;
  33
  34 /* console.c */
  35
  36 int vc_allocate(unsigned int console);
  37 int vc_cons_allocated(unsigned int console);
  38 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
  39 void vc_deallocate(unsigned int console);
  40 void reset_palette(struct vc_data *vc);
  41 void do_blank_screen(int entering_gfx);
  42 void do_unblank_screen(int leaving_gfx);
  43 void unblank_screen(void);
  44 void poke_blanked_console(void);
  45 int con_font_op(struct vc_data *vc, struct console_font_op *op);
  46 int con_set_cmap(unsigned char __user *cmap);
  47 int con_get_cmap(unsigned char __user *cmap);
  48 void scrollback(struct vc_data *vc, int lines);
  49 void scrollfront(struct vc_data *vc, int lines);
  50 void update_region(struct vc_data *vc, unsigned long start, int count);
  51 void redraw_screen(struct vc_data *vc, int is_switch);
  52 #define update_screen(x) redraw_screen(x, 0)
  53 #define switch_screen(x) redraw_screen(x, 1)
  54
  55 struct tty_struct;
  56 int tioclinux(struct tty_struct *tty, unsigned long arg);
  57
  58 #ifdef CONFIG_CONSOLE_TRANSLATIONS
  59 /* consolemap.c */
  60
  61 struct unimapinit;
  62 struct unipair;
  63
  64 int con_set_trans_old(unsigned char __user * table);
  65 int con_get_trans_old(unsigned char __user * table);
  66 int con_set_trans_new(unsigned short __user * table);
  67 int con_get_trans_new(unsigned short __user * table);
  68 int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui);
  69 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
  70 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
  71 int con_set_default_unimap(struct vc_data *vc);
  72 void con_free_unimap(struct vc_data *vc);
  73 void con_protect_unimap(struct vc_data *vc, int rdonly);
  74 int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
  75
  76 #define vc_translate(vc, c) ((vc)->vc_translate[(c) |                   \
  77                                         ((vc)->vc_toggle_meta ? 0x80 : 0)])
  78 #else
  79 #define con_set_trans_old(arg) (0)
  80 #define con_get_trans_old(arg) (-EINVAL)
  81 #define con_set_trans_new(arg) (0)
  82 #define con_get_trans_new(arg) (-EINVAL)
  83 #define con_clear_unimap(vc, ui) (0)
  84 #define con_set_unimap(vc, ct, list) (0)
  85 #define con_set_default_unimap(vc) (0)
  86 #define con_copy_unimap(d, s) (0)
  87 #define con_get_unimap(vc, ct, uct, list) (-EINVAL)
  88 #define con_free_unimap(vc) do { ; } while (0)
  89 #define con_protect_unimap(vc, rdonly) do { ; } while (0)
  90
  91 #define vc_translate(vc, c) (c)
  92 #endif
  93
  94 /* vt.c */
  95 void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
  96 int vt_waitactive(int n);
  97 void change_console(struct vc_data *new_vc);
  98 void reset_vc(struct vc_data *vc);
  99 extern int unbind_con_driver(const struct consw *csw, int first, int last,
 100                              int deflt);
 101 int vty_init(const struct file_operations *console_fops);
 102
 103 /*
 104  * vc_screen.c shares this temporary buffer with the console write code so that
 105  * we can easily avoid touching user space while holding the console spinlock.
 106  */
 107
 108 #define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE)
 109 extern char con_buf[CON_BUF_SIZE];
 110 extern struct mutex con_buf_mtx;
 111 extern char vt_dont_switch;
 112 extern int default_utf8;
 113
 114 struct vt_spawn_console {
 115         spinlock_t lock;
 116         struct pid *pid;
 117         int sig;
 118 };
 119 extern struct vt_spawn_console vt_spawn_con;
 120
 121 extern int vt_move_to_console(unsigned int vt, int alloc);
 122
 123 /* Interfaces for VC notification of character events (for accessibility etc) */
 124
 125 struct vt_notifier_param {
 126         struct vc_data *vc;     /* VC on which the update happened */
 127         unsigned int c;         /* Printed char */
 128 };
 129
 130 extern int register_vt_notifier(struct notifier_block *nb);
 131 extern int unregister_vt_notifier(struct notifier_block *nb);
 132
 133 #endif /* _VT_KERN_H */