You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
1.4 KiB
75 lines
1.4 KiB
/*
|
|
* 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 "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;
|
|
}
|
|
|