197 lines
7.0 KiB
C
197 lines
7.0 KiB
C
/* 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_pagedict;
|
|
|
|
#define NPAR 16
|
|
#define VC_TABSTOPS_COUNT 256U
|
|
|
|
enum vc_intensity {
|
|
VCI_HALF_BRIGHT,
|
|
VCI_NORMAL,
|
|
VCI_BOLD,
|
|
VCI_MASK = 0x3,
|
|
};
|
|
|
|
/**
|
|
* struct vc_state -- state of a VC
|
|
* @x: cursor's x-position
|
|
* @y: cursor's y-position
|
|
* @color: foreground & background colors
|
|
* @Gx_charset: what's G0/G1 slot set to (like GRAF_MAP, LAT1_MAP)
|
|
* @charset: what character set to use (0=G0 or 1=G1)
|
|
* @intensity: see enum vc_intensity for values
|
|
* @reverse: reversed foreground/background colors
|
|
*
|
|
* These members are defined separately from struct vc_data as we save &
|
|
* restore them at times.
|
|
*/
|
|
struct vc_state {
|
|
unsigned int x, y;
|
|
|
|
unsigned char color;
|
|
|
|
unsigned char Gx_charset[2];
|
|
unsigned int charset : 1;
|
|
|
|
/* attribute flags */
|
|
enum vc_intensity intensity;
|
|
bool italic;
|
|
bool underline;
|
|
bool blink;
|
|
bool reverse;
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
struct vc_state state, saved_state;
|
|
|
|
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 int vc_cell_height; /* CRTC character cell height */
|
|
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_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 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_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 */
|
|
/* 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;
|
|
DECLARE_BITMAP(vc_tab_stop, VC_TABSTOPS_COUNT); /* Tab stops. 256 columns. */
|
|
unsigned char vc_palette[16*3]; /* Colour palette for VGA+ */
|
|
unsigned short * vc_translate;
|
|
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_pagedict *uni_pagedict;
|
|
struct uni_pagedict **uni_pagedict_loc; /* [!] Location of uni_pagedict variable for this console */
|
|
u32 **vc_uni_lines; /* 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 */
|
|
};
|
|
|
|
extern struct vc vc_cons [MAX_NR_CONSOLES];
|
|
extern void vc_SAK(struct work_struct *work);
|
|
|
|
#define CUR_MAKE(size, change, set) ((size) | ((change) << 8) | \
|
|
((set) << 16))
|
|
#define CUR_SIZE(c) ((c) & 0x00000f)
|
|
# 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_SW 0x000010
|
|
#define CUR_ALWAYS_BG 0x000020
|
|
#define CUR_INVERT_FG_BG 0x000040
|
|
#define CUR_FG 0x000700
|
|
#define CUR_BG 0x007000
|
|
#define CUR_CHANGE(c) ((c) & 0x00ff00)
|
|
#define CUR_SET(c) (((c) & 0xff0000) >> 8)
|
|
|
|
bool con_is_visible(const struct vc_data *vc);
|
|
|
|
#endif /* _LINUX_CONSOLE_STRUCT_H */
|