| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 | |
| 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); |