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0014dea6 MN |
1 | /* |
2 | * Copyright (C) 2016 Imagination Technologies | |
ca208b5f | 3 | * Author: Marcin Nowakowski <marcin.nowakowski@mips.com> |
0014dea6 MN |
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 | ||
15 | static 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 | ||
39 | static int __init register_generic_kexec(void) | |
40 | { | |
41 | _machine_kexec_prepare = generic_kexec_prepare; | |
42 | return 0; | |
43 | } | |
44 | arch_initcall(register_generic_kexec); |