efi_system_table_64_t
efi_system_table_64_t *stbl = (efi_system_table_64_t *)sys_tbl_pa;
mend = mstart + sizeof(efi_system_table_64_t);
efi_system_table_64_t *stbl = (efi_system_table_64_t *)kaddr;
int size = efi_enabled(EFI_64BIT) ? sizeof(efi_system_table_64_t)
const efi_system_table_64_t *systab64 = p;