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Commit 0014dea6 authored by Marcin Nowakowski's avatar Marcin Nowakowski Committed by Ralf Baechle
Browse files

MIPS: generic/kexec: add support for a DTB passed in a separate buffer 



Signed-off-by: default avatarMarcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14615/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 856b0f59

arch/mips/generic/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -13,3 +13,4 @@ obj-y += irq.o 
obj-y += proc.o



obj-$(CONFIG_LEGACY_BOARD_SEAD3)	+= board-sead3.o

obj-$(CONFIG_KEXEC)			+= kexec.o

arch/mips/generic/kexec.c

0 → 100644
+44 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2016 Imagination Technologies

 * Author: Marcin Nowakowski <marcin.nowakowski@imgtec.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);