5 #include <asm/mmu_context.h>
7 #include <asm/ptrace.h>
8 #include <asm/tlbflush.h>
11 extern void efi_init(void);
16 int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
17 int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
19 #define arch_efi_call_virt_setup() \
21 kernel_neon_begin(); \
25 #define arch_efi_call_virt(p, f, args...) \
32 #define arch_efi_call_virt_teardown() \
34 efi_virtmap_unload(); \
38 #define ARCH_EFI_IRQ_FLAGS_MASK (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT)
40 /* arch specific definitions used by the stub code */
43 * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
44 * start of kernel and may not cross a 2MiB boundary. We set alignment to
45 * 2MiB so we know it won't cross a 2MiB boundary.
47 #define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
48 #define MAX_FDT_OFFSET SZ_512M
50 #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
51 #define __efi_call_early(f, ...) f(__VA_ARGS__)
52 #define efi_is_64bit() (true)
54 #define alloc_screen_info(x...) &screen_info
56 static inline void free_screen_info(efi_system_table_t *sys_table_arg,
57 struct screen_info *si)
61 /* redeclare as 'hidden' so the compiler will generate relative references */
62 extern struct screen_info screen_info __attribute__((__visibility__("hidden")));
64 static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
68 #define EFI_ALLOC_ALIGN SZ_64K
71 * On ARM systems, virtually remapped UEFI runtime services are set up in two
73 * - The stub retrieves the final version of the memory map from UEFI, populates
74 * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime
75 * service to communicate the new mapping to the firmware (Note that the new
76 * mapping is not live at this time)
77 * - During an early initcall(), the EFI system table is permanently remapped
78 * and the virtual remapping of the UEFI Runtime Services regions is loaded
79 * into a private set of page tables. If this all succeeds, the Runtime
80 * Services are enabled and the EFI_RUNTIME_SERVICES bit set.
83 static inline void efi_set_pgd(struct mm_struct *mm)
85 switch_mm(NULL, mm, NULL);
88 void efi_virtmap_load(void);
89 void efi_virtmap_unload(void);
91 #endif /* _ASM_EFI_H */