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TOMOYO Linux Cross Reference
Linux/include/linux/vt_kern.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _VT_KERN_H
  3 #define _VT_KERN_H
  4 
  5 /*
  6  * this really is an extension of the vc_cons structure in console.c, but
  7  * with information needed by the vt package
  8  */
  9 
 10 #include <linux/vt.h>
 11 #include <linux/kd.h>
 12 #include <linux/tty.h>
 13 #include <linux/mutex.h>
 14 #include <linux/console_struct.h>
 15 #include <linux/mm.h>
 16 #include <linux/consolemap.h>
 17 #include <linux/notifier.h>
 18 
 19 /*
 20  * Presently, a lot of graphics programs do not restore the contents of
 21  * the higher font pages.  Defining this flag will avoid use of them, but
 22  * will lose support for PIO_FONTRESET.  Note that many font operations are
 23  * not likely to work with these programs anyway; they need to be
 24  * fixed.  The linux/Documentation directory includes a code snippet
 25  * to save and restore the text font.
 26  */
 27 #ifdef CONFIG_VGA_CONSOLE
 28 #define BROKEN_GRAPHICS_PROGRAMS 1
 29 #endif
 30 
 31 extern void kd_mksound(unsigned int hz, unsigned int ticks);
 32 extern int kbd_rate(struct kbd_repeat *rep);
 33 extern int fg_console, last_console, want_console;
 34 
 35 /* console.c */
 36 
 37 int vc_allocate(unsigned int console);
 38 int vc_cons_allocated(unsigned int console);
 39 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
 40 struct vc_data *vc_deallocate(unsigned int console);
 41 void reset_palette(struct vc_data *vc);
 42 void do_blank_screen(int entering_gfx);
 43 void do_unblank_screen(int leaving_gfx);
 44 void unblank_screen(void);
 45 void poke_blanked_console(void);
 46 int con_font_op(struct vc_data *vc, struct console_font_op *op);
 47 int con_set_cmap(unsigned char __user *cmap);
 48 int con_get_cmap(unsigned char __user *cmap);
 49 void scrollback(struct vc_data *vc);
 50 void scrollfront(struct vc_data *vc, int lines);
 51 void clear_buffer_attributes(struct vc_data *vc);
 52 void update_region(struct vc_data *vc, unsigned long start, int count);
 53 void redraw_screen(struct vc_data *vc, int is_switch);
 54 #define update_screen(x) redraw_screen(x, 0)
 55 #define switch_screen(x) redraw_screen(x, 1)
 56 
 57 struct tty_struct;
 58 int tioclinux(struct tty_struct *tty, unsigned long arg);
 59 
 60 #ifdef CONFIG_CONSOLE_TRANSLATIONS
 61 /* consolemap.c */
 62 
 63 struct unipair;
 64 
 65 int con_set_trans_old(unsigned char __user * table);
 66 int con_get_trans_old(unsigned char __user * table);
 67 int con_set_trans_new(unsigned short __user * table);
 68 int con_get_trans_new(unsigned short __user * table);
 69 int con_clear_unimap(struct vc_data *vc);
 70 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
 71 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
 72 int con_set_default_unimap(struct vc_data *vc);
 73 void con_free_unimap(struct vc_data *vc);
 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)
 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 do_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 extern char vt_dont_switch;
139 extern int default_utf8;
140 extern int global_cursor_default;
141 
142 struct vt_spawn_console {
143         spinlock_t lock;
144         struct pid *pid;
145         int sig;
146 };
147 extern struct vt_spawn_console vt_spawn_con;
148 
149 extern int vt_move_to_console(unsigned int vt, int alloc);
150 
151 /* Interfaces for VC notification of character events (for accessibility etc) */
152 
153 struct vt_notifier_param {
154         struct vc_data *vc;     /* VC on which the update happened */
155         unsigned int c;         /* Printed char */
156 };
157 
158 extern int register_vt_notifier(struct notifier_block *nb);
159 extern int unregister_vt_notifier(struct notifier_block *nb);
160 
161 extern void hide_boot_cursor(bool hide);
162 
163 /* keyboard  provided interfaces */
164 extern int vt_do_diacrit(unsigned int cmd, void __user *up, int eperm);
165 extern int vt_do_kdskbmode(int console, unsigned int arg);
166 extern int vt_do_kdskbmeta(int console, unsigned int arg);
167 extern int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
168                                                                 int perm);
169 extern int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe,
170                                         int perm, int console);
171 extern int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb,
172                                         int perm);
173 extern int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm);
174 extern int vt_do_kdgkbmode(int console);
175 extern int vt_do_kdgkbmeta(int console);
176 extern void vt_reset_unicode(int console);
177 extern int vt_get_shift_state(void);
178 extern void vt_reset_keyboard(int console);
179 extern int vt_get_leds(int console, int flag);
180 extern int vt_get_kbd_mode_bit(int console, int bit);
181 extern void vt_set_kbd_mode_bit(int console, int bit);
182 extern void vt_clr_kbd_mode_bit(int console, int bit);
183 extern void vt_set_led_state(int console, int leds);
184 extern void vt_set_led_state(int console, int leds);
185 extern void vt_kbd_con_start(int console);
186 extern void vt_kbd_con_stop(int console);
187 
188 void vc_scrolldelta_helper(struct vc_data *c, int lines,
189                 unsigned int rolled_over, void *_base, unsigned int size);
190 
191 #endif /* _VT_KERN_H */
192 

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