1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * console_struct.h
4 *
5 * Data structure describing single virtual console except for data
6 * used by vt.c.
7 *
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.
11 */
12
13 #ifndef _LINUX_CONSOLE_STRUCT_H
14 #define _LINUX_CONSOLE_STRUCT_H
15
16 #include <linux/wait.h>
17 #include <linux/vt.h>
18 #include <linux/workqueue.h>
19
20 struct uni_pagedir;
21 struct uni_screen;
22
23 #define NPAR 16
24
25 /*
26 * Example: vc_data of a console that was scrolled 3 lines down.
27 *
28 * Console buffer
29 * vc_screenbuf ---------> +----------------------+-.
30 * | initializing W | \
31 * | initializing X | |
32 * | initializing Y | > scroll-back area
33 * | initializing Z | |
34 * | | /
35 * vc_visible_origin ---> ^+----------------------+-:
36 * (changes by scroll) || Welcome to linux | \
37 * || | |
38 * vc_rows --->< | login: root | | visible on console
39 * || password: | > (vc_screenbuf_size is
40 * vc_origin -----------> || | | vc_size_row * vc_rows)
41 * (start when no scroll) || Last login: 12:28 | /
42 * v+----------------------+-:
43 * | Have a lot of fun... | \
44 * vc_pos -----------------|--------v | > scroll-front area
45 * | ~ # cat_ | /
46 * vc_scr_end -----------> +----------------------+-:
47 * (vc_origin + | | \ EMPTY, to be filled by
48 * vc_screenbuf_size) | | / vc_video_erase_char
49 * +----------------------+-'
50 * <---- 2 * vc_cols ----->
51 * <---- vc_size_row ----->
52 *
53 * Note that every character in the console buffer is accompanied with an
54 * attribute in the buffer right after the character. This is not depicted
55 * in the figure.
56 */
57 struct vc_data {
58 struct tty_port port; /* Upper level data */
59
60 unsigned short vc_num; /* Console number */
61 unsigned int vc_cols; /* [#] Console size */
62 unsigned int vc_rows;
63 unsigned int vc_size_row; /* Bytes per row */
64 unsigned int vc_scan_lines; /* # of scan lines */
65 unsigned long vc_origin; /* [!] Start of real screen */
66 unsigned long vc_scr_end; /* [!] End of real screen */
67 unsigned long vc_visible_origin; /* [!] Top of visible window */
68 unsigned int vc_top, vc_bottom; /* Scrolling region */
69 const struct consw *vc_sw;
70 unsigned short *vc_screenbuf; /* In-memory character/attribute buffer */
71 unsigned int vc_screenbuf_size;
72 unsigned char vc_mode; /* KD_TEXT, ... */
73 /* attributes for all characters on screen */
74 unsigned char vc_attr; /* Current attributes */
75 unsigned char vc_def_color; /* Default colors */
76 unsigned char vc_color; /* Foreground & background */
77 unsigned char vc_s_color; /* Saved foreground & background */
78 unsigned char vc_ulcolor; /* Color for underline mode */
79 unsigned char vc_itcolor;
80 unsigned char vc_halfcolor; /* Color for half intensity mode */
81 /* cursor */
82 unsigned int vc_cursor_type;
83 unsigned short vc_complement_mask; /* [#] Xor mask for mouse pointer */
84 unsigned short vc_s_complement_mask; /* Saved mouse pointer mask */
85 unsigned int vc_x, vc_y; /* Cursor position */
86 unsigned int vc_saved_x, vc_saved_y;
87 unsigned long vc_pos; /* Cursor address */
88 /* fonts */
89 unsigned short vc_hi_font_mask; /* [#] Attribute set for upper 256 chars of font or 0 if not supported */
90 struct console_font vc_font; /* Current VC font set */
91 unsigned short vc_video_erase_char; /* Background erase character */
92 /* VT terminal data */
93 unsigned int vc_state; /* Escape sequence parser state */
94 unsigned int vc_npar,vc_par[NPAR]; /* Parameters of current escape sequence */
95 /* data for manual vt switching */
96 struct vt_mode vt_mode;
97 struct pid *vt_pid;
98 int vt_newvt;
99 wait_queue_head_t paste_wait;
100 /* mode flags */
101 unsigned int vc_charset : 1; /* Character set G0 / G1 */
102 unsigned int vc_s_charset : 1; /* Saved character set */
103 unsigned int vc_disp_ctrl : 1; /* Display chars < 32? */
104 unsigned int vc_toggle_meta : 1; /* Toggle high bit? */
105 unsigned int vc_decscnm : 1; /* Screen Mode */
106 unsigned int vc_decom : 1; /* Origin Mode */
107 unsigned int vc_decawm : 1; /* Autowrap Mode */
108 unsigned int vc_deccm : 1; /* Cursor Visible */
109 unsigned int vc_decim : 1; /* Insert Mode */
110 /* attribute flags */
111 unsigned int vc_intensity : 2; /* 0=half-bright, 1=normal, 2=bold */
112 unsigned int vc_italic:1;
113 unsigned int vc_underline : 1;
114 unsigned int vc_blink : 1;
115 unsigned int vc_reverse : 1;
116 unsigned int vc_s_intensity : 2; /* saved rendition */
117 unsigned int vc_s_italic:1;
118 unsigned int vc_s_underline : 1;
119 unsigned int vc_s_blink : 1;
120 unsigned int vc_s_reverse : 1;
121 /* misc */
122 unsigned int vc_ques : 1;
123 unsigned int vc_need_wrap : 1;
124 unsigned int vc_can_do_color : 1;
125 unsigned int vc_report_mouse : 2;
126 unsigned char vc_utf : 1; /* Unicode UTF-8 encoding */
127 unsigned char vc_utf_count;
128 int vc_utf_char;
129 unsigned int vc_tab_stop[8]; /* Tab stops. 256 columns. */
130 unsigned char vc_palette[16*3]; /* Colour palette for VGA+ */
131 unsigned short * vc_translate;
132 unsigned char vc_G0_charset;
133 unsigned char vc_G1_charset;
134 unsigned char vc_saved_G0;
135 unsigned char vc_saved_G1;
136 unsigned int vc_resize_user; /* resize request from user */
137 unsigned int vc_bell_pitch; /* Console bell pitch */
138 unsigned int vc_bell_duration; /* Console bell duration */
139 unsigned short vc_cur_blink_ms; /* Cursor blink duration */
140 struct vc_data **vc_display_fg; /* [!] Ptr to var holding fg console for this display */
141 struct uni_pagedir *vc_uni_pagedir;
142 struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */
143 struct uni_screen *vc_uni_screen; /* unicode screen content */
144 bool vc_panic_force_write; /* when oops/panic this VC can accept forced output/blanking */
145 /* additional information is in vt_kern.h */
146 };
147
148 struct vc {
149 struct vc_data *d;
150 struct work_struct SAK_work;
151
152 /* might add scrmem, kbd at some time,
153 to have everything in one place - the disadvantage
154 would be that vc_cons etc can no longer be static */
155 };
156
157 extern struct vc vc_cons [MAX_NR_CONSOLES];
158 extern void vc_SAK(struct work_struct *work);
159
160 #define CUR_DEF 0
161 #define CUR_NONE 1
162 #define CUR_UNDERLINE 2
163 #define CUR_LOWER_THIRD 3
164 #define CUR_LOWER_HALF 4
165 #define CUR_TWO_THIRDS 5
166 #define CUR_BLOCK 6
167 #define CUR_HWMASK 0x0f
168 #define CUR_SWMASK 0xfff0
169
170 #define CUR_DEFAULT CUR_UNDERLINE
171
con_is_visible(const struct vc_data * vc)172 static inline bool con_is_visible(const struct vc_data *vc)
173 {
174 return *vc->vc_display_fg == vc;
175 }
176
177 #endif /* _LINUX_CONSOLE_STRUCT_H */
178
