linux/arch/x86/boot/main.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
 *
 * ----------------------------------------------------------------------- */

/*
 * Main module for the real-mode kernel code
 */
#include <linux/build_bug.h>

#include "boot.h"
#include "string.h"

struct boot_params boot_params __attribute__((aligned …));

struct port_io_ops pio_ops;

char *HEAP = …;
char *heap_end = …;		/* Default end of heap = no heap */

/*
 * Copy the header into the boot parameter block.  Since this
 * screws up the old-style command line protocol, adjust by
 * filling in the new-style command line pointer instead.
 */
static void copy_boot_params(void)
{ … }

/*
 * Query the keyboard lock status as given by the BIOS, and
 * set the keyboard repeat rate to maximum.  Unclear why the latter
 * is done here; this might be possible to kill off as stale code.
 */
static void keyboard_init(void)
{ … }

/*
 * Get Intel SpeedStep (IST) information.
 */
static void query_ist(void)
{ … }

/*
 * Tell the BIOS what CPU mode we intend to run in.
 */
static void set_bios_mode(void)
{ … }

static void init_heap(void)
{ … }

void main(void)
{ … }