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/console_struct.h>
  13 #include <linux/mm.h>
  14
  15 /*
  16  * Presently, a lot of graphics programs do not restore the contents of
  17  * the higher font pages.  Defining this flag will avoid use of them, but
  18  * will lose support for PIO_FONTRESET.  Note that many font operations are
  19  * not likely to work with these programs anyway; they need to be
  20  * fixed.  The linux/Documentation directory includes a code snippet
  21  * to save and restore the text font.
  22  */
  23 #ifdef CONFIG_VGA_CONSOLE
  24 #define BROKEN_GRAPHICS_PROGRAMS 1
  25 #endif
  26
  27 extern void kd_mksound(unsigned int hz, unsigned int ticks);
  28 extern int kbd_rate(struct kbd_repeat *rep);
  29 extern int fg_console, last_console, want_console;
  30
  31 /* console.c */
  32
  33 int vc_allocate(unsigned int console);
  34 int vc_cons_allocated(unsigned int console);
  35 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
  36 int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
  37 void vc_deallocate(unsigned int console);
  38 void reset_palette(struct vc_data *vc);
  39 void do_blank_screen(int entering_gfx);
  40 void do_unblank_screen(int leaving_gfx);
  41 void unblank_screen(void);
  42 void poke_blanked_console(void);
  43 int con_font_op(struct vc_data *vc, struct console_font_op *op);
  44 int con_set_cmap(unsigned char __user *cmap);
  45 int con_get_cmap(unsigned char __user *cmap);
  46 void scrollback(struct vc_data *vc, int lines);
  47 void scrollfront(struct vc_data *vc, int lines);
  48 void update_region(struct vc_data *vc, unsigned long start, int count);
  49 void redraw_screen(struct vc_data *vc, int is_switch);
  50 #define update_screen(x) redraw_screen(x, 0)
  51 #define switch_screen(x) redraw_screen(x, 1)
  52
  53 struct tty_struct;
  54 int tioclinux(struct tty_struct *tty, unsigned long arg);
  55
  56 /* consolemap.c */
  57
  58 struct unimapinit;
  59 struct unipair;
  60
  61 int con_set_trans_old(unsigned char __user * table);
  62 int con_get_trans_old(unsigned char __user * table);
  63 int con_set_trans_new(unsigned short __user * table);
  64 int con_get_trans_new(unsigned short __user * table);
  65 int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui);
  66 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
  67 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
  68 int con_set_default_unimap(struct vc_data *vc);
  69 void con_free_unimap(struct vc_data *vc);
  70 void con_protect_unimap(struct vc_data *vc, int rdonly);
  71 int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
  72
  73 /* vt.c */
  74 int vt_waitactive(int vt);
  75 void change_console(struct vc_data *new_vc);
  76 void reset_vc(struct vc_data *vc);
  77
  78 /*
  79  * vc_screen.c shares this temporary buffer with the console write code so that
  80  * we can easily avoid touching user space while holding the console spinlock.
  81  */
  82
  83 #define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE)
  84 extern char con_buf[CON_BUF_SIZE];
  85 extern struct semaphore con_buf_sem;
  86
  87 struct vt_spawn_console {
  88         spinlock_t lock;
  89         struct pid *pid;
  90         int sig;
  91 };
  92 extern struct vt_spawn_console vt_spawn_con;
  93
  94 #endif /* _VT_KERN_H */