1 /*
2 * Copyright (c) 2017-2024, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <arm_acle.h>
8 #include <assert.h>
9 #include <stdbool.h>
10 #include <stdint.h>
11 #include <string.h>
12
13 #include <lib/mmio.h>
14 #include <lib/smccc.h>
15 #include <lib/utils_def.h>
16 #include <plat/common/platform.h>
17 #include <platform_def.h>
18 #include <services/trng_svc.h>
19 #include <smccc_helpers.h>
20
21 DEFINE_SVC_UUID2(_plat_trng_uuid,
22 0x23523c58, 0x7448, 0x4083, 0x9d, 0x16,
23 0xe3, 0xfa, 0xb9, 0xf1, 0x73, 0xbc
24 );
25 uuid_t plat_trng_uuid;
26
27 /* Dummy implementation */
plat_get_entropy(uint64_t * out)28 bool plat_get_entropy(uint64_t *out)
29 {
30 *out = 0xABBAEDDAACDCDEAD;
31
32 return true;
33 }
34
plat_entropy_setup(void)35 void plat_entropy_setup(void)
36 {
37 uint64_t dummy;
38
39 plat_trng_uuid = _plat_trng_uuid;
40
41 /* Initialise the entropy source and trigger RNG generation */
42 plat_get_entropy(&dummy);
43 }
44