blob: ed798e114663560efe329dbeb21fcb5f4c0ebfd9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* console_struct.h
*
* Data structure describing single virtual console except for data
* used by vt.c.
*
* Fields marked with [#] must be set by the low-level driver.
* Fields marked with [!] can be changed by the low-level driver
* to achieve effects such as fast scrolling by changing the origin.
*/
#ifndef _LINUX_CONSOLE_STRUCT_H
#define _LINUX_CONSOLE_STRUCT_H
#include <linux/wait.h>
#include <linux/vt.h>
#include <linux/workqueue.h>
struct uni_pagedir;
struct uni_screen;
#define NPAR 16
/*
* Example: vc_data of a console that was scrolled 3 lines down.
*
* Console buffer
* vc_screenbuf ---------> +----------------------+-.
* | initializing W | \
* | initializing X | |
* | initializing Y | > scroll-back area
* | initializing Z | |
* | | /
* vc_visible_origin ---> ^+----------------------+-:
* (changes by scroll) || Welcome to linux | \
* || | |
* vc_rows --->< | login: root | | visible on console
* || password: | > (vc_screenbuf_size is
* vc_origin -----------> || | | vc_size_row * vc_rows)
* (start when no scroll) || Last login: 12:28 | /
* v+----------------------+-:
* | Have a lot of fun... | \
* vc_pos -----------------|--------v | > scroll-front area
* | ~ # cat_ | /
* vc_scr_end -----------> +----------------------+-:
* (vc_origin + | | \ EMPTY, to be filled by
* vc_screenbuf_size) | | / vc_video_erase_char
* +----------------------+-'
* <---- 2 * vc_cols ----->
* <---- vc_size_row ----->
*
* Note that every character in the console buffer is accompanied with an
* attribute in the buffer right after the character. This is not depicted
* in the figure.
*/
struct vc_data {
struct tty_port port; /* Upper level data */
unsigned short vc_num; /* Console number */
unsigned int vc_cols; /* [#] Console size */
unsigned int vc_rows;
unsigned int vc_size_row; /* Bytes per row */
unsigned int vc_scan_lines; /* # of scan lines */
unsigned long vc_origin; /* [!] Start of real screen */
unsigned long vc_scr_end; /* [!] End of real screen */
unsigned long vc_visible_origin; /* [!] Top of visible window */
unsigned int vc_top, vc_bottom; /* Scrolling region */
const struct consw *vc_sw;
unsigned short *vc_screenbuf; /* In-memory character/attribute buffer */
unsigned int vc_screenbuf_size;
unsigned char vc_mode; /* KD_TEXT, ... */
/* attributes for all characters on screen */
unsigned char vc_attr; /* Current attributes */
unsigned char vc_def_color; /* Default colors */
unsigned char vc_color; /* Foreground & background */
unsigned char vc_s_color; /* Saved foreground & background */
unsigned char vc_ulcolor; /* Color for underline mode */
unsigned char vc_itcolor;
unsigned char vc_halfcolor; /* Color for half intensity mode */
/* cursor */
unsigned int vc_cursor_type;
unsigned short vc_complement_mask; /* [#] Xor mask for mouse pointer */
unsigned short vc_s_complement_mask; /* Saved mouse pointer mask */
unsigned int vc_x, vc_y; /* Cursor position */
unsigned int vc_saved_x, vc_saved_y;
unsigned long vc_pos; /* Cursor address */
/* fonts */
unsigned short vc_hi_font_mask; /* [#] Attribute set for upper 256 chars of font or 0 if not supported */
struct console_font vc_font; /* Current VC font set */
unsigned short vc_video_erase_char; /* Background erase character */
/* VT terminal data */
unsigned int vc_state; /* Escape sequence parser state */
unsigned int vc_npar,vc_par[NPAR]; /* Parameters of current escape sequence */
/* data for manual vt switching */
struct vt_mode vt_mode;
struct pid *vt_pid;
int vt_newvt;
wait_queue_head_t paste_wait;
/* mode flags */
unsigned int vc_charset : 1; /* Character set G0 / G1 */
unsigned int vc_s_charset : 1; /* Saved character set */
unsigned int vc_disp_ctrl : 1; /* Display chars < 32? */
unsigned int vc_toggle_meta : 1; /* Toggle high bit? */
unsigned int vc_decscnm : 1; /* Screen Mode */
unsigned int vc_decom : 1; /* Origin Mode */
unsigned int vc_decawm : 1; /* Autowrap Mode */
unsigned int vc_deccm : 1; /* Cursor Visible */
unsigned int vc_decim : 1; /* Insert Mode */
/* attribute flags */
unsigned int vc_intensity : 2; /* 0=half-bright, 1=normal, 2=bold */
unsigned int vc_italic:1;
unsigned int vc_underline : 1;
unsigned int vc_blink : 1;
unsigned int vc_reverse : 1;
unsigned int vc_s_intensity : 2; /* saved rendition */
unsigned int vc_s_italic:1;
unsigned int vc_s_underline : 1;
unsigned int vc_s_blink : 1;
unsigned int vc_s_reverse : 1;
/* misc */
unsigned int vc_priv : 3;
unsigned int vc_need_wrap : 1;
unsigned int vc_can_do_color : 1;
unsigned int vc_report_mouse : 2;
unsigned char vc_utf : 1; /* Unicode UTF-8 encoding */
unsigned char vc_utf_count;
int vc_utf_char;
unsigned int vc_tab_stop[8]; /* Tab stops. 256 columns. */
unsigned char vc_palette[16*3]; /* Colour palette for VGA+ */
unsigned short * vc_translate;
unsigned char vc_G0_charset;
unsigned char vc_G1_charset;
unsigned char vc_saved_G0;
unsigned char vc_saved_G1;
unsigned int vc_resize_user; /* resize request from user */
unsigned int vc_bell_pitch; /* Console bell pitch */
unsigned int vc_bell_duration; /* Console bell duration */
unsigned short vc_cur_blink_ms; /* Cursor blink duration */
struct vc_data **vc_display_fg; /* [!] Ptr to var holding fg console for this display */
struct uni_pagedir *vc_uni_pagedir;
struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */
struct uni_screen *vc_uni_screen; /* unicode screen content */
/* additional information is in vt_kern.h */
};
struct vc {
struct vc_data *d;
struct work_struct SAK_work;
/* might add scrmem, kbd at some time,
to have everything in one place - the disadvantage
would be that vc_cons etc can no longer be static */
};
extern struct vc vc_cons [MAX_NR_CONSOLES];
extern void vc_SAK(struct work_struct *work);
#define CUR_DEF 0
#define CUR_NONE 1
#define CUR_UNDERLINE 2
#define CUR_LOWER_THIRD 3
#define CUR_LOWER_HALF 4
#define CUR_TWO_THIRDS 5
#define CUR_BLOCK 6
#define CUR_HWMASK 0x0f
#define CUR_SWMASK 0xfff0
#define CUR_DEFAULT CUR_UNDERLINE
static inline bool con_is_visible(const struct vc_data *vc)
{
return *vc->vc_display_fg == vc;
}
#endif /* _LINUX_CONSOLE_STRUCT_H */
|
