| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* |
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| 3 | * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
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| 4 | */ |
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| 5 | |
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| 6 | #include <linux/init.h> |
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| 7 | #include <linux/memblock.h> |
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| 8 | #include <linux/initrd.h> |
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| 9 | #include <asm/types.h> |
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| 10 | #include <init.h> |
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| 11 | #include <os.h> |
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| 12 | |
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| 13 | #include "um_arch.h" |
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| 14 | |
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| 15 | /* Changed by uml_initrd_setup, which is a setup */ |
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| 16 | static char *initrd __initdata = NULL; |
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| 17 | |
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| 18 | int __init read_initrd(void) |
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| 19 | { |
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| 20 | unsigned long long size; |
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| 21 | void *area; |
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| 22 | |
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| 23 | if (!initrd) |
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| 24 | return 0; |
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| 25 | |
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| 26 | area = uml_load_file(filename: initrd, size: &size); |
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| 27 | if (!area) |
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| 28 | return 0; |
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| 29 | |
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| 30 | initrd_start = (unsigned long) area; |
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| 31 | initrd_end = initrd_start + size; |
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| 32 | return 0; |
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| 33 | } |
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| 34 | |
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| 35 | static int __init uml_initrd_setup(char *line, int *add) |
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| 36 | { |
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| 37 | *add = 0; |
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| 38 | initrd = line; |
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| 39 | return 0; |
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| 40 | } |
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| 41 | |
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| 42 | __uml_setup("initrd=" , uml_initrd_setup, |
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| 43 | "initrd=<initrd image>\n" |
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| 44 | " This is used to boot UML from an initrd image. The argument is the\n" |
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| 45 | " name of the file containing the image.\n\n" |
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| 46 | ); |
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| 47 | |
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