1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (c) 2019, Linaro Limited
4  */
5 
6 #if !defined _EFI_RNG_H_
7 #define _EFI_RNG_H_
8 
9 #include <efi.h>
10 #include <efi_api.h>
11 
12 /* EFI random number generation protocol related GUID definitions */
13 #define EFI_RNG_PROTOCOL_GUID \
14 	EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, \
15 		 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
16 
17 #define EFI_RNG_ALGORITHM_RAW \
18 	EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, \
19 		 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)
20 
21 struct efi_rng_protocol {
22 	efi_status_t (EFIAPI *get_info)(struct efi_rng_protocol *protocol,
23 					efi_uintn_t *rng_algorithm_list_size,
24 					efi_guid_t *rng_algorithm_list);
25 	efi_status_t (EFIAPI *get_rng)(struct efi_rng_protocol *protocol,
26 				       efi_guid_t *rng_algorithm,
27 				       efi_uintn_t rng_value_length, uint8_t *rng_value);
28 };
29 
30 efi_status_t platform_get_rng_device(struct udevice **dev);
31 
32 #endif /* _EFI_RNG_H_ */
33