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/*
* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_EFI_H
#define __ASM_ARM_EFI_H
#include <asm/cacheflush.h>
#include <asm/cachetype.h>
#include <asm/early_ioremap.h>
#include <asm/fixmap.h>
#include <asm/highmem.h>
#include <asm/mach/map.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#ifdef CONFIG_EFI
void efi_init(void);
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
#define efi_call_virt(f, ...) \
({ \
efi_##f##_t *__f; \
efi_status_t __s; \
\
efi_virtmap_load(); \
__f = efi.systab->runtime->f; \
__s = __f(__VA_ARGS__); \
efi_virtmap_unload(); \
__s; \
})
#define __efi_call_virt(f, ...) \
({ \
efi_##f##_t *__f; \
\
efi_virtmap_load(); \
__f = efi.systab->runtime->f; \
__f(__VA_ARGS__); \
efi_virtmap_unload(); \
})
static inline void efi_set_pgd(struct mm_struct *mm)
{
check_and_switch_context(mm, NULL);
}
void efi_virtmap_load(void);
void efi_virtmap_unload(void);
#else
#define efi_init()
#endif /* CONFIG_EFI */
/* arch specific definitions used by the stub code */
#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
#define __efi_call_early(f, ...) f(__VA_ARGS__)
#define efi_is_64bit() (false)
/*
* A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
* so we will reserve that amount of memory. We have no easy way to tell what
* the actuall size of code + data the uncompressed kernel will use.
* If this is insufficient, the decompressor will relocate itself out of the
* way before performing the decompression.
*/
#define MAX_UNCOMP_KERNEL_SIZE SZ_32M
/*
* The kernel zImage should preferably be located between 32 MB and 128 MB
* from the base of DRAM. The min address leaves space for a maximal size
* uncompressed image, and the max address is due to how the zImage decompressor
* picks a destination address.
*/
#define ZIMAGE_OFFSET_LIMIT SZ_128M
#define MIN_ZIMAGE_OFFSET MAX_UNCOMP_KERNEL_SIZE
#define MAX_FDT_OFFSET ZIMAGE_OFFSET_LIMIT
#endif /* _ASM_ARM_EFI_H */
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