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/*
* arch/arm64/include/asm/dmi.h
*
* Copyright (C) 2013 Linaro Limited.
* Written by: Yi Li (yi.li@linaro.org)
*
* based on arch/ia64/include/asm/dmi.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef __ASM_DMI_H
#define __ASM_DMI_H
#include <linux/slab.h>
#include <linux/efi.h>
static inline void __iomem *dmi_remap(u64 phys, u64 size)
{
void __iomem *p = efi_lookup_mapped_addr(phys);
/*
* If the mapping spans multiple pages, do a minimal check to ensure
* that the mapping returned by efi_lookup_mapped_addr() covers the
* whole requested range (but ignore potential holes)
*/
if ((phys & ~PAGE_MASK) + size > PAGE_SIZE
&& (p + size - 1) != efi_lookup_mapped_addr(phys + size - 1))
return NULL;
return p;
}
/* Reuse existing UEFI mappings for DMI */
#define dmi_alloc(l) kzalloc(l, GFP_KERNEL)
#define dmi_early_remap(x, l) dmi_remap(x, l)
#define dmi_early_unmap(x, l)
#define dmi_unmap(x)
#endif
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