From 0014dea6b71ae3e0384c3358f632b4728c3d432e Mon Sep 17 00:00:00 2001 From: Marcin Nowakowski Date: Wed, 23 Nov 2016 14:43:52 +0100 Subject: MIPS: generic/kexec: add support for a DTB passed in a separate buffer Signed-off-by: Marcin Nowakowski Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14615/ Signed-off-by: Ralf Baechle --- arch/mips/generic/kexec.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 arch/mips/generic/kexec.c (limited to 'arch/mips/generic/kexec.c') diff --git a/arch/mips/generic/kexec.c b/arch/mips/generic/kexec.c new file mode 100644 index 000000000000..e9fb735299e3 --- /dev/null +++ b/arch/mips/generic/kexec.c @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2016 Imagination Technologies + * Author: Marcin Nowakowski + * + * 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 +#include +#include + +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); -- cgit v1.2.1