diff options
Diffstat (limited to 'arch/arm/include/asm/efi.h')
-rw-r--r-- | arch/arm/include/asm/efi.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h new file mode 100644 index 0000000000..78282ced50 --- /dev/null +++ b/arch/arm/include/asm/efi.h @@ -0,0 +1,81 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> + */ + +#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/ptrace.h> + +#ifdef CONFIG_EFI +void efi_init(void); +void arm_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, bool); + +#define arch_efi_call_virt_setup() efi_virtmap_load() +#define arch_efi_call_virt_teardown() efi_virtmap_unload() + +#define ARCH_EFI_IRQ_FLAGS_MASK \ + (PSR_J_BIT | PSR_E_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | \ + PSR_T_BIT | MODE_MASK) + +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 arm_efi_init() +#endif /* CONFIG_EFI */ + +/* arch specific definitions used by the stub code */ + +/* + * 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 + +/* + * phys-to-virt patching requires that the physical to virtual offset is a + * multiple of 2 MiB. However, using an alignment smaller than TEXT_OFFSET + * here throws off the memory allocation logic, so let's use the lowest power + * of two greater than 2 MiB and greater than TEXT_OFFSET. + */ +#define EFI_PHYS_ALIGN max(UL(SZ_2M), roundup_pow_of_two(TEXT_OFFSET)) + +/* on ARM, the initrd should be loaded in a lowmem region */ +static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr) +{ + return round_down(image_addr, SZ_4M) + SZ_512M; +} + +struct efi_arm_entry_state { + u32 cpsr_before_ebs; + u32 sctlr_before_ebs; + u32 cpsr_after_ebs; + u32 sctlr_after_ebs; +}; + +static inline void efi_capsule_flush_cache_range(void *addr, int size) +{ + __cpuc_flush_dcache_area(addr, size); +} + +#endif /* _ASM_ARM_EFI_H */ |