arch/arm64/include/asm/efi.h

   1 #ifndef _ASM_EFI_H
   2 #define _ASM_EFI_H
   3
   4 #include <asm/io.h>
   5 #include <asm/neon.h>
   6
   7 #ifdef CONFIG_EFI
   8 extern void efi_init(void);
   9 extern void efi_idmap_init(void);
  10 #else
  11 #define efi_init()
  12 #define efi_idmap_init()
  13 #endif
  14
  15 #define efi_call_virt(f, ...)                                           \
  16 ({                                                                      \
  17         efi_##f##_t *__f = efi.systab->runtime->f;                      \
  18         efi_status_t __s;                                               \
  19                                                                         \
  20         kernel_neon_begin();                                            \
  21         __s = __f(__VA_ARGS__);                                         \
  22         kernel_neon_end();                                              \
  23         __s;                                                            \
  24 })
  25
  26 #define __efi_call_virt(f, ...)                                         \
  27 ({                                                                      \
  28         efi_##f##_t *__f = efi.systab->runtime->f;                      \
  29                                                                         \
  30         kernel_neon_begin();                                            \
  31         __f(__VA_ARGS__);                                               \
  32         kernel_neon_end();                                              \
  33 })
  34
  35 /* arch specific definitions used by the stub code */
  36
  37 /*
  38  * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
  39  * start of kernel and may not cross a 2MiB boundary. We set alignment to
  40  * 2MiB so we know it won't cross a 2MiB boundary.
  41  */
  42 #define EFI_FDT_ALIGN   SZ_2M   /* used by allocate_new_fdt_and_exit_boot() */
  43 #define MAX_FDT_OFFSET  SZ_512M
  44
  45 #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
  46
  47 #endif /* _ASM_EFI_H */