v4.19.13 snapshot.
diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h
new file mode 100644
index 0000000..fea64f2
--- /dev/null
+++ b/include/linux/console_struct.h
@@ -0,0 +1,177 @@
+/* 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_ques : 1;
+ 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 */
+ bool vc_panic_force_write; /* when oops/panic this VC can accept forced output/blanking */
+ /* 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 */