5 #include <asm/mmu_context.h>
7 #include <asm/tlbflush.h>
10 extern void efi_init(void);
15 int efi_create_mapping(struct mm_struct
*mm
, efi_memory_desc_t
*md
);
17 #define efi_call_virt(f, ...) \
22 kernel_neon_begin(); \
24 __f = efi.systab->runtime->f; \
25 __s = __f(__VA_ARGS__); \
26 efi_virtmap_unload(); \
31 #define __efi_call_virt(f, ...) \
35 kernel_neon_begin(); \
37 __f = efi.systab->runtime->f; \
39 efi_virtmap_unload(); \
43 /* arch specific definitions used by the stub code */
46 * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
47 * start of kernel and may not cross a 2MiB boundary. We set alignment to
48 * 2MiB so we know it won't cross a 2MiB boundary.
50 #define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
51 #define MAX_FDT_OFFSET SZ_512M
53 #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
55 #define EFI_ALLOC_ALIGN SZ_64K
58 * On ARM systems, virtually remapped UEFI runtime services are set up in two
60 * - The stub retrieves the final version of the memory map from UEFI, populates
61 * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime
62 * service to communicate the new mapping to the firmware (Note that the new
63 * mapping is not live at this time)
64 * - During an early initcall(), the EFI system table is permanently remapped
65 * and the virtual remapping of the UEFI Runtime Services regions is loaded
66 * into a private set of page tables. If this all succeeds, the Runtime
67 * Services are enabled and the EFI_RUNTIME_SERVICES bit set.
70 static inline void efi_set_pgd(struct mm_struct
*mm
)
72 switch_mm(NULL
, mm
, NULL
);
75 void efi_virtmap_load(void);
76 void efi_virtmap_unload(void);
78 #endif /* _ASM_EFI_H */
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