1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Data structure describing single virtual console except for data
8 * Fields marked with [#] must be set by the low-level driver.
9 * Fields marked with [!] can be changed by the low-level driver
10 * to achieve effects such as fast scrolling by changing the origin.
13 #ifndef _LINUX_CONSOLE_STRUCT_H
14 #define _LINUX_CONSOLE_STRUCT_H
16 #include <linux/wait.h>
18 #include <linux/workqueue.h>
24 #define VC_TABSTOPS_COUNT 256U
34 * struct vc_state -- state of a VC
35 * @x: cursor's x-position
36 * @y: cursor's y-position
37 * @color: foreground & background colors
38 * @Gx_charset: what's G0/G1 slot set to (like GRAF_MAP, LAT1_MAP)
39 * @charset: what character set to use (0=G0 or 1=G1)
40 * @intensity: see enum vc_intensity for values
41 * @reverse: reversed foreground/background colors
43 * These members are defined separately from struct vc_data as we save &
44 * restore them at times.
51 unsigned char Gx_charset[2];
52 unsigned int charset : 1;
55 enum vc_intensity intensity;
63 * Example: vc_data of a console that was scrolled 3 lines down.
66 * vc_screenbuf ---------> +----------------------+-.
67 * | initializing W | \
68 * | initializing X | |
69 * | initializing Y | > scroll-back area
70 * | initializing Z | |
72 * vc_visible_origin ---> ^+----------------------+-:
73 * (changes by scroll) || Welcome to linux | \
75 * vc_rows --->< | login: root | | visible on console
76 * || password: | > (vc_screenbuf_size is
77 * vc_origin -----------> || | | vc_size_row * vc_rows)
78 * (start when no scroll) || Last login: 12:28 | /
79 * v+----------------------+-:
80 * | Have a lot of fun... | \
81 * vc_pos -----------------|--------v | > scroll-front area
83 * vc_scr_end -----------> +----------------------+-:
84 * (vc_origin + | | \ EMPTY, to be filled by
85 * vc_screenbuf_size) | | / vc_video_erase_char
86 * +----------------------+-'
87 * <---- 2 * vc_cols ----->
88 * <---- vc_size_row ----->
90 * Note that every character in the console buffer is accompanied with an
91 * attribute in the buffer right after the character. This is not depicted
95 struct tty_port port; /* Upper level data */
97 struct vc_state state, saved_state;
99 unsigned short vc_num; /* Console number */
100 unsigned int vc_cols; /* [#] Console size */
101 unsigned int vc_rows;
102 unsigned int vc_size_row; /* Bytes per row */
103 unsigned int vc_scan_lines; /* # of scan lines */
104 unsigned long vc_origin; /* [!] Start of real screen */
105 unsigned long vc_scr_end; /* [!] End of real screen */
106 unsigned long vc_visible_origin; /* [!] Top of visible window */
107 unsigned int vc_top, vc_bottom; /* Scrolling region */
108 const struct consw *vc_sw;
109 unsigned short *vc_screenbuf; /* In-memory character/attribute buffer */
110 unsigned int vc_screenbuf_size;
111 unsigned char vc_mode; /* KD_TEXT, ... */
112 /* attributes for all characters on screen */
113 unsigned char vc_attr; /* Current attributes */
114 unsigned char vc_def_color; /* Default colors */
115 unsigned char vc_ulcolor; /* Color for underline mode */
116 unsigned char vc_itcolor;
117 unsigned char vc_halfcolor; /* Color for half intensity mode */
119 unsigned int vc_cursor_type;
120 unsigned short vc_complement_mask; /* [#] Xor mask for mouse pointer */
121 unsigned short vc_s_complement_mask; /* Saved mouse pointer mask */
122 unsigned long vc_pos; /* Cursor address */
124 unsigned short vc_hi_font_mask; /* [#] Attribute set for upper 256 chars of font or 0 if not supported */
125 struct console_font vc_font; /* Current VC font set */
126 unsigned short vc_video_erase_char; /* Background erase character */
127 /* VT terminal data */
128 unsigned int vc_state; /* Escape sequence parser state */
129 unsigned int vc_npar,vc_par[NPAR]; /* Parameters of current escape sequence */
130 /* data for manual vt switching */
131 struct vt_mode vt_mode;
134 wait_queue_head_t paste_wait;
136 unsigned int vc_disp_ctrl : 1; /* Display chars < 32? */
137 unsigned int vc_toggle_meta : 1; /* Toggle high bit? */
138 unsigned int vc_decscnm : 1; /* Screen Mode */
139 unsigned int vc_decom : 1; /* Origin Mode */
140 unsigned int vc_decawm : 1; /* Autowrap Mode */
141 unsigned int vc_deccm : 1; /* Cursor Visible */
142 unsigned int vc_decim : 1; /* Insert Mode */
144 unsigned int vc_priv : 3;
145 unsigned int vc_need_wrap : 1;
146 unsigned int vc_can_do_color : 1;
147 unsigned int vc_report_mouse : 2;
148 unsigned char vc_utf : 1; /* Unicode UTF-8 encoding */
149 unsigned char vc_utf_count;
151 DECLARE_BITMAP(vc_tab_stop, VC_TABSTOPS_COUNT); /* Tab stops. 256 columns. */
152 unsigned char vc_palette[16*3]; /* Colour palette for VGA+ */
153 unsigned short * vc_translate;
154 unsigned int vc_resize_user; /* resize request from user */
155 unsigned int vc_bell_pitch; /* Console bell pitch */
156 unsigned int vc_bell_duration; /* Console bell duration */
157 unsigned short vc_cur_blink_ms; /* Cursor blink duration */
158 struct vc_data **vc_display_fg; /* [!] Ptr to var holding fg console for this display */
159 struct uni_pagedir *vc_uni_pagedir;
160 struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */
161 struct uni_screen *vc_uni_screen; /* unicode screen content */
162 /* additional information is in vt_kern.h */
167 struct work_struct SAK_work;
169 /* might add scrmem, kbd at some time,
170 to have everything in one place */
173 extern struct vc vc_cons [MAX_NR_CONSOLES];
174 extern void vc_SAK(struct work_struct *work);
176 #define CUR_MAKE(size, change, set) ((size) | ((change) << 8) | \
178 #define CUR_SIZE(c) ((c) & 0x00000f)
181 # define CUR_UNDERLINE 2
182 # define CUR_LOWER_THIRD 3
183 # define CUR_LOWER_HALF 4
184 # define CUR_TWO_THIRDS 5
186 #define CUR_SW 0x000010
187 #define CUR_ALWAYS_BG 0x000020
188 #define CUR_INVERT_FG_BG 0x000040
189 #define CUR_FG 0x000700
190 #define CUR_BG 0x007000
191 #define CUR_CHANGE(c) ((c) & 0x00ff00)
192 #define CUR_SET(c) (((c) & 0xff0000) >> 8)
194 bool con_is_visible(const struct vc_data *vc);
196 #endif /* _LINUX_CONSOLE_STRUCT_H */