tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2016 Imagination Technologies
3 * Author: Marcin Nowakowski <marcin.nowakowski@mips.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 */
10
11#include <linux/kexec.h>
12#include <linux/libfdt.h>
13#include <linux/uaccess.h>
14
15static int generic_kexec_prepare(struct kimage *image)
16{
17 int i;
18
19 for (i = 0; i < image->nr_segments; i++) {
20 struct fdt_header fdt;
21
22 if (image->segment[i].memsz <= sizeof(fdt))
23 continue;
24
25 if (copy_from_user(&fdt, image->segment[i].buf, sizeof(fdt)))
26 continue;
27
28 if (fdt_check_header(&fdt))
29 continue;
30
31 kexec_args[0] = -2;
32 kexec_args[1] = (unsigned long)
33 phys_to_virt((unsigned long)image->segment[i].mem);
34 break;
35 }
36 return 0;
37}
38
39static int __init register_generic_kexec(void)
40{
41 _machine_kexec_prepare = generic_kexec_prepare;
42 return 0;
43}
44arch_initcall(register_generic_kexec);