/* * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ #include "linux/init.h"#include "linux/bootmem.h"#include "linux/initrd.h"#include "asm/types.h"#include "user_util.h"#include "kern_util.h"#include "initrd.h"#include "init.h"#include "os.h" /* Changed by uml_initrd_setup, which is a setup */static char *initrd __initdata = NULL; static int __init read_initrd(void){	void *area;	long long size;	int err; 	if(initrd == NULL) return 0;	err = os_file_size(initrd, &size);	if(err) return 0;	area = alloc_bootmem(size);	if(area == NULL) return 0;	if(load_initrd(initrd, area, size) == -1) return 0;	initrd_start = (unsigned long) area;	initrd_end = initrd_start + size;	return 0;} __uml_postsetup(read_initrd); static int __init uml_initrd_setup(char *line, int *add){	initrd = line;	return 0;} __uml_setup("initrd=", uml_initrd_setup,"initrd=<initrd image>\n""    This is used to boot UML from an initrd image.  The argument is the\n""    name of the file containing the image.\n\n"); int load_initrd(char *filename, void *buf, int size){	int fd, n; 	fd = os_open_file(filename, of_read(OPENFLAGS()), 0);	if(fd < 0){		printk("Opening '%s' failed - err = %d\n", filename, -fd);		return(-1);	}	n = os_read_file(fd, buf, size);	if(n != size){		printk("Read of %d bytes from '%s' failed, err = %d\n", size,		       filename, -n);		return(-1);	} 	os_close_file(fd);	return(0);}/* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only.  This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-file-style: "linux" * End: */