76  * 1) describe line orientation & lines list concept against screen
77  * 2) describe conversion of screen to lines
95 	/* Current tty screen. */
100 	struct tty3270_line *screen;  member
132 #define TTY_UPDATE_LINES	0x4	/* Update visible screen lines */
133 #define TTY_UPDATE_ALL		0x7	/* Recreate screen. */
193 	return tp->screen + tty3270_line_increment(tp, tp->line_write_start, num);  in tty3270_get_write_line()
198 	return tp->screen + tty3270_line_increment(tp, tp->line_view_start, num - tp->nr_up);  in tty3270_get_view_line()
214  * The input line are the two last lines of the screen.
249  * The status line is the last line of the screen. It shows the string
250  * "Running"/"History X" in the lower right corner of the screen.
488 			tp->screen[i].dirty = 0;  in tty3270_update_lines_visible()
681 	 * has to be emitted to the tty and for 0x6d the screen  in tty3270_read_tasklet()
888  * Allocate tty3270 screen.
893 	struct tty3270_line *screen;  in tty3270_alloc_screen()  local
897 	screen = kcalloc(allocated, sizeof(struct tty3270_line), GFP_KERNEL);  in tty3270_alloc_screen()
898 	if (!screen)  in tty3270_alloc_screen()
901 		screen[lines].cells = kcalloc(cols, sizeof(struct tty3270_cell), GFP_KERNEL);  in tty3270_alloc_screen()
902 		if (!screen[lines].cells)  in tty3270_alloc_screen()
906 	return screen;  in tty3270_alloc_screen()
909 		kfree(screen[lines].cells);  in tty3270_alloc_screen()
910 	kfree(screen);  in tty3270_alloc_screen()
948  * Free tty3270 screen.
950 static void tty3270_free_screen(struct tty3270_line *screen, int old_lines)  in tty3270_free_screen()  argument
955 		kfree(screen[lines].cells);  in tty3270_free_screen()
956 	kfree(screen);  in tty3270_free_screen()
960  * Resize tty3270 screen
967 	struct tty3270_line *screen, *oscreen;  in tty3270_resize()  local
990 	screen = tty3270_alloc_screen(tp, new_rows, new_cols, &new_allocated);  in tty3270_resize()
991 	if (IS_ERR(screen))  in tty3270_resize()
1000 	oscreen = tp->screen;  in tty3270_resize()
1001 	tp->screen = screen;  in tty3270_resize()
1031 	tty3270_free_screen(screen, new_rows);  in tty3270_resize()
1063 	tty3270_free_screen(tp->screen, tp->allocated_lines);  in tty3270_free()
1114 	tp->screen = tty3270_alloc_screen(tp, tp->view.rows, tp->view.cols,  in tty3270_create_view()
1116 	if (IS_ERR(tp->screen)) {  in tty3270_create_view()
1117 		rc = PTR_ERR(tp->screen);  in tty3270_create_view()
1167 	tty3270_free_screen(tp->screen, tp->view.rows);  in tty3270_create_view()
1255  * Insert character into the screen at the current position with the
1426  *  Esc [ 0 J	Erase from current position to bottom of screen inclusive
1427  *  Esc [ 1 J	Erase from top of screen to current position inclusive
1428  *  Esc [ 2 J	Erase entire screen (without moving the cursor)