diff options
Diffstat (limited to 'include/services/trng_svc.h')
| -rw-r--r-- | include/services/trng_svc.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/include/services/trng_svc.h b/include/services/trng_svc.h new file mode 100644 index 000000000..ed4d557ca --- /dev/null +++ b/include/services/trng_svc.h @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2021, ARM Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef TRNG_SVC_H +#define TRNG_SVC_H + +#include <stdbool.h> +#include <stdint.h> + +#include <lib/smccc.h> + +/* SMC function IDs for TRNG queries */ +#define ARM_TRNG_VERSION U(0x84000050) +#define ARM_TRNG_FEATURES U(0x84000051) +#define ARM_TRNG_GET_UUID U(0x84000052) +#define ARM_TRNG_RND32 U(0x84000053) +#define ARM_TRNG_RND64 U(0xc4000053) + +/* TRNG version numbers */ +#define TRNG_VERSION_MAJOR (0x1) +#define TRNG_VERSION_MINOR (0x0) + +/* TRNG Error Numbers */ +#define TRNG_E_SUCCESS (0) +#define TRNG_E_NOT_SUPPORTED (-1) +#define TRNG_E_INVALID_PARAMS (-2) +#define TRNG_E_NO_ENTROPY (-3) +#define TRNG_E_NOT_IMPLEMENTED (-4) + +#if TRNG_SUPPORT +void trng_setup(void); +bool is_trng_fid(uint32_t smc_fid); +#else +static inline void trng_setup(void) +{ +} + +static inline bool is_trng_fid(uint32_t smc_fid) +{ + return false; +} +#endif +uintptr_t trng_smc_handler( + uint32_t smc_fid, + u_register_t x1, + u_register_t x2, + u_register_t x3, + u_register_t x4, + void *cookie, + void *handle, + u_register_t flags +); + +#endif /* TRNG_SVC_H */ |