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Diffstat (limited to 'arch/arm64/include/asm/dmi.h')
| -rw-r--r-- | arch/arm64/include/asm/dmi.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/dmi.h b/arch/arm64/include/asm/dmi.h new file mode 100644 index 00000000000..b0882a8620e --- /dev/null +++ b/arch/arm64/include/asm/dmi.h @@ -0,0 +1,41 @@ +/* + * 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 |