/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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#ifndef __ASM_ARM_EFI_H
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#define __ASM_ARM_EFI_H
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#include <asm/cacheflush.h>
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#include <asm/cachetype.h>
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#include <asm/early_ioremap.h>
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#include <asm/fixmap.h>
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#include <asm/highmem.h>
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#include <asm/mach/map.h>
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#include <asm/mmu_context.h>
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#include <asm/ptrace.h>
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#ifdef CONFIG_EFI
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void efi_init(void);
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int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
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int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
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#define arch_efi_call_virt_setup() efi_virtmap_load()
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#define arch_efi_call_virt_teardown() efi_virtmap_unload()
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#define arch_efi_call_virt(p, f, args...) \
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({ \
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efi_##f##_t *__f; \
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__f = p->f; \
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__f(args); \
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})
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#define ARCH_EFI_IRQ_FLAGS_MASK \
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(PSR_J_BIT | PSR_E_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | \
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PSR_T_BIT | MODE_MASK)
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static inline void efi_set_pgd(struct mm_struct *mm)
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{
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unsigned long flags;
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protect_inband_mm(flags);
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check_and_switch_context(mm, NULL);
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unprotect_inband_mm(flags);
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}
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void efi_virtmap_load(void);
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void efi_virtmap_unload(void);
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#else
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#define efi_init()
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#endif /* CONFIG_EFI */
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/* arch specific definitions used by the stub code */
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struct screen_info *alloc_screen_info(void);
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void free_screen_info(struct screen_info *si);
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static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
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{
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}
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/*
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* A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
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* so we will reserve that amount of memory. We have no easy way to tell what
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* the actuall size of code + data the uncompressed kernel will use.
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* If this is insufficient, the decompressor will relocate itself out of the
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* way before performing the decompression.
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*/
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#define MAX_UNCOMP_KERNEL_SIZE SZ_32M
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/*
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* phys-to-virt patching requires that the physical to virtual offset fits
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* into the immediate field of an add/sub instruction, which comes down to the
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* 24 least significant bits being zero, and so the offset should be a multiple
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* of 16 MB. Since PAGE_OFFSET itself is a multiple of 16 MB, the physical
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* base should be aligned to 16 MB as well.
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*/
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#define EFI_PHYS_ALIGN SZ_16M
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/* on ARM, the FDT should be located in a lowmem region */
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static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
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{
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return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
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}
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/* on ARM, the initrd should be loaded in a lowmem region */
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static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
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{
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return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
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}
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struct efi_arm_entry_state {
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u32 cpsr_before_ebs;
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u32 sctlr_before_ebs;
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u32 cpsr_after_ebs;
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u32 sctlr_after_ebs;
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};
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#endif /* _ASM_ARM_EFI_H */
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