linux/arch/x86/boot/video.c

// SPDX-License-Identifier: GPL-2.0-only
/* -*- linux-c -*- ------------------------------------------------------- *
 *
 *   Copyright (C) 1991, 1992 Linus Torvalds
 *   Copyright 2007 rPath, Inc. - All Rights Reserved
 *   Copyright 2009 Intel Corporation; author H. Peter Anvin
 *
 * ----------------------------------------------------------------------- */

/*
 * Select video mode
 */

#include <uapi/asm/boot.h>

#include "boot.h"
#include "video.h"
#include "vesa.h"

static u16 video_segment;

static void store_cursor_position(void)
{ … }

static void store_video_mode(void)
{ … }

/*
 * Store the video mode parameters for later usage by the kernel.
 * This is done by asking the BIOS except for the rows/columns
 * parameters in the default 80x25 mode -- these are set directly,
 * because some very obscure BIOSes supply insane values.
 */
static void store_mode_params(void)
{ … }

static unsigned int get_entry(void)
{ … }

static void display_menu(void)
{ … }

#define H(x) …
#define SCAN …

static unsigned int mode_menu(void)
{ … }

/* Save screen content to the heap */
static struct saved_screen { … } saved;

static void save_screen(void)
{ … }

static void restore_screen(void)
{ … }

void set_video(void)
{ … }