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 static inline int con_set_trans_old(unsigned char __user *table)
  80 {
  81         return 0;
  82 }
  83 static inline int con_get_trans_old(unsigned char __user *table)
  84 {
  85         return -EINVAL;
  86 }
  87 static inline int con_set_trans_new(unsigned short __user *table)
  88 {
  89         return 0;
  90 }
  91 static inline int con_get_trans_new(unsigned short __user *table)
  92 {
  93         return -EINVAL;
  94 }
  95 static inline int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
  96 {
  97         return 0;
  98 }
  99 static inline
 100 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
 101 {
 102         return 0;
 103 }
 104 static inline
 105 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
 106                    struct unipair __user *list)
 107 {
 108         return -EINVAL;
 109 }
 110 static inline int con_set_default_unimap(struct vc_data *vc)
 111 {
 112         return 0;
 113 }
 114 static inline void con_free_unimap(struct vc_data *vc)
 115 {
 116 }
 117 static inline void con_protect_unimap(struct vc_data *vc, int rdonly)
 118 {
 119 }
 120 static inline
 121 int 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 */
 130 void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
 131 int vt_waitactive(int n);
 132 void change_console(struct vc_data *new_vc);
 133 void reset_vc(struct vc_data *vc);
 134 extern int unbind_con_driver(const struct consw *csw, int first, int last,
 135                              int deflt);
 136 int vty_init(const struct file_operations *console_fops);
 137
 138 static 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)
 151 extern char con_buf[CON_BUF_SIZE];
 152 extern struct mutex con_buf_mtx;
 153 extern char vt_dont_switch;
 154 extern int default_utf8;
 155 extern int global_cursor_default;
 156
 157 struct vt_spawn_console {
 158         spinlock_t lock;
 159         struct pid *pid;
 160         int sig;
 161 };
 162 extern struct vt_spawn_console vt_spawn_con;
 163
 164 extern int vt_move_to_console(unsigned int vt, int alloc);
 165
 166 /* Interfaces for VC notification of character events (for accessibility etc) */
 167
 168 struct vt_notifier_param {
 169         struct vc_data *vc;     /* VC on which the update happened */
 170         unsigned int c;         /* Printed char */
 171 };
 172
 173 extern int register_vt_notifier(struct notifier_block *nb);
 174 extern int unregister_vt_notifier(struct notifier_block *nb);
 175
 176 extern void hide_boot_cursor(bool hide);
 177
 178 #endif /* _VT_KERN_H */