1 /* SPDX-License-Identifier: GPL-2.0-only */
6 #ifndef __ASM_ARM_EFI_H
7 #define __ASM_ARM_EFI_H
9 #include <asm/cacheflush.h>
10 #include <asm/cachetype.h>
11 #include <asm/early_ioremap.h>
12 #include <asm/fixmap.h>
13 #include <asm/highmem.h>
14 #include <asm/mach/map.h>
15 #include <asm/mmu_context.h>
16 #include <asm/ptrace.h>
20 void arm_efi_init(void);
22 int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
23 int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md, bool);
25 #define arch_efi_call_virt_setup() efi_virtmap_load()
26 #define arch_efi_call_virt_teardown() efi_virtmap_unload()
28 #define ARCH_EFI_IRQ_FLAGS_MASK \
29 (PSR_J_BIT | PSR_E_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | \
30 PSR_T_BIT | MODE_MASK)
32 static inline void efi_set_pgd(struct mm_struct *mm)
34 check_and_switch_context(mm, NULL);
37 void efi_virtmap_load(void);
38 void efi_virtmap_unload(void);
41 #define arm_efi_init()
42 #endif /* CONFIG_EFI */
44 /* arch specific definitions used by the stub code */
47 * A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
48 * so we will reserve that amount of memory. We have no easy way to tell what
49 * the actuall size of code + data the uncompressed kernel will use.
50 * If this is insufficient, the decompressor will relocate itself out of the
51 * way before performing the decompression.
53 #define MAX_UNCOMP_KERNEL_SIZE SZ_32M
56 * phys-to-virt patching requires that the physical to virtual offset is a
57 * multiple of 2 MiB. However, using an alignment smaller than TEXT_OFFSET
58 * here throws off the memory allocation logic, so let's use the lowest power
59 * of two greater than 2 MiB and greater than TEXT_OFFSET.
61 #define EFI_PHYS_ALIGN max(UL(SZ_2M), roundup_pow_of_two(TEXT_OFFSET))
63 /* on ARM, the initrd should be loaded in a lowmem region */
64 static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
66 return round_down(image_addr, SZ_4M) + SZ_512M;
69 struct efi_arm_entry_state {
76 static inline void efi_capsule_flush_cache_range(void *addr, int size)
78 __cpuc_flush_dcache_area(addr, size);
81 #endif /* _ASM_ARM_EFI_H */