| /* |
| * 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); |