E3B48E07F8403AB9B2D1007 l=J 2BP@n1h 0# t-9a4()P@nNF/* 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 #include #include 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_colo