LXR linux/include/linux/vt

   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
  30extern void kd_mksound(unsigned int hz, unsigned int ticks);
  31extern int kbd_rate(struct kbd_repeat *rep);
  32extern int fg_console, last_console, want_console;
  33
  34/* console.c */
  35
  36int vc_allocate(unsigned int console);
  37int vc_cons_allocated(unsigned int console);
  38int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
  39void vc_deallocate(unsigned int console);
  40void reset_palette(struct vc_data *vc);
  41void do_blank_screen(int entering_gfx);
  42void do_unblank_screen(int leaving_gfx);
  43void unblank_screen(void);
  44void poke_blanked_console(void);
  45int con_font_op(struct vc_data *vc, struct console_font_op *op);
  46int con_set_cmap(unsigned char __user *cmap);
  47int con_get_cmap(unsigned char __user *cmap);
  48void scrollback(struct vc_data *vc, int lines);
  49void scrollfront(struct vc_data *vc, int lines);
  50void update_region(struct vc_data *vc, unsigned long start, int count);
  51void 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
  55struct tty_struct;
  56int tioclinux(struct tty_struct *tty, unsigned long arg);
  57
  58#ifdef CONFIG_CONSOLE_TRANSLATIONS
  59/* consolemap.c */
  60
  61struct unimapinit;
  62struct unipair;
  63
  64int con_set_trans_old(unsigned char __user * table);
  65int con_get_trans_old(unsigned char __user * table);
  66int con_set_trans_new(unsigned short __user * table);
  67int con_get_trans_new(unsigned short __user * table);
  68int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui);
  69int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
  70int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
  71int con_set_default_unimap(struct vc_data *vc);
  72void con_free_unimap(struct vc_data *vc);
  73void con_protect_unimap(struct vc_data *vc, int rdonly);
  74int 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
  79static inline int con_set_trans_old(unsigned char __user *table)
  80{
  81        return 0;
  82}
  83static inline int con_get_trans_old(unsigned char __user *table)
  84{
  85        return -EINVAL;
  86}
  87static inline int con_set_trans_new(unsigned short __user *table)
  88{
  89        return 0;
  90}
  91static inline int con_get_trans_new(unsigned short __user *table)
  92{
  93        return -EINVAL;
  94}
  95static inline int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
  96{
  97        return 0;
  98}
  99static inline
 100int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
 101{
 102        return 0;
 103}
 104static inline
 105int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
 106                   struct unipair __user *list)
 107{
 108        return -EINVAL;
 109}
 110static inline int con_set_default_unimap(struct vc_data *vc)
 111{
 112        return 0;
 113}
 114static inline void con_free_unimap(struct vc_data *vc)
 115{
 116}
 117static inline void con_protect_unimap(struct vc_data *vc, int rdonly)
 118{
 119}
 120static inline
 121int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
 122{
 123        return 0;
 124}
 125
 126#define vc_translate(vc, c) (c)
 127#endif
 128
 129/* vt.c */
 130void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
 131int vt_waitactive(int n);
 132void change_console(struct vc_data *new_vc);
 133void reset_vc(struct vc_data *vc);
 134extern int unbind_con_driver(const struct consw *csw, int first, int last,
 135                             int deflt);
 136int vty_init(const struct file_operations *console_fops);
 137
 138static inline bool vt_force_oops_output(struct vc_data *vc)
 139{
 140        if (oops_in_progress && vc->vc_panic_force_write)
 141                return true;
 142        return false;
 143}
 144
 145/*
 146 * vc_screen.c shares this temporary buffer with the console write code so that
 147 * we can easily avoid touching user space while holding the console spinlock.
 148 */
 149
 150#define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE)
 151extern char con_buf[CON_BUF_SIZE];
 152extern struct mutex con_buf_mtx;
 153extern char vt_dont_switch;
 154extern int default_utf8;
 155extern int global_cursor_default;
 156
 157struct vt_spawn_console {
 158        spinlock_t lock;
 159        struct pid *pid;
 160        int sig;
 161};
 162extern struct vt_spawn_console vt_spawn_con;
 163
 164extern int vt_move_to_console(unsigned int vt, int alloc);
 165
 166/* Interfaces for VC notification of character events (for accessibility etc) */
 167
 168struct vt_notifier_param {
 169        struct vc_data *vc;     /* VC on which the update happened */
 170        unsigned int c;         /* Printed char */
 171};
 172
 173extern int register_vt_notifier(struct notifier_block *nb);
 174extern int unregister_vt_notifier(struct notifier_block *nb);
 175
 176extern void hide_boot_cursor(bool hide);
 177
 178#endif /* _VT_KERN_H */
 179