45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
/*
|
|
* Copyright (C) 2016 Imagination Technologies
|
|
* Author: Marcin Nowakowski <marcin.nowakowski@mips.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/kexec.h>
|
|
#include <linux/libfdt.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
static int generic_kexec_prepare(struct kimage *image)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < image->nr_segments; i++) {
|
|
struct fdt_header fdt;
|
|
|
|
if (image->segment[i].memsz <= sizeof(fdt))
|
|
continue;
|
|
|
|
if (copy_from_user(&fdt, image->segment[i].buf, sizeof(fdt)))
|
|
continue;
|
|
|
|
if (fdt_check_header(&fdt))
|
|
continue;
|
|
|
|
kexec_args[0] = -2;
|
|
kexec_args[1] = (unsigned long)
|
|
phys_to_virt((unsigned long)image->segment[i].mem);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __init register_generic_kexec(void)
|
|
{
|
|
_machine_kexec_prepare = generic_kexec_prepare;
|
|
return 0;
|
|
}
|
|
arch_initcall(register_generic_kexec);
|