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 */ 16 static char *initrd __initdata = NULL; 17 18 int __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 35 static 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