1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 */
5
6#include <linux/init.h>
7#include <linux/memblock.h>
8#include <linux/initrd.h>
9#include <asm/types.h>
10#include <init.h>
11#include <os.h>
12
13#include "um_arch.h"
14
15/* Changed by uml_initrd_setup, which is a setup */
16static char *initrd __initdata = NULL;
17
18int __init read_initrd(void)
19{
20	unsigned long long size;
21	void *area;
22
23	if (!initrd)
24		return 0;
25
26	area = uml_load_file(initrd, &size);
27	if (!area)
28		return 0;
29
30	initrd_start = (unsigned long) area;
31	initrd_end = initrd_start + size;
32	return 0;
33}
34
35static int __init uml_initrd_setup(char *line, int *add)
36{
37	initrd = line;
38	return 0;
39}
40
41__uml_setup("initrd=", uml_initrd_setup,
42"initrd=<initrd image>\n"
43"    This is used to boot UML from an initrd image.  The argument is the\n"
44"    name of the file containing the image.\n\n"
45);
46