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Edit File: console_struct.h

/* 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 #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_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 */ }; 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 */