1*7dfb9911SJimmy Brisson /* 2*7dfb9911SJimmy Brisson * Copyright (c) 2021, ARM Limited. All rights reserved. 3*7dfb9911SJimmy Brisson * 4*7dfb9911SJimmy Brisson * SPDX-License-Identifier: BSD-3-Clause 5*7dfb9911SJimmy Brisson */ 6*7dfb9911SJimmy Brisson 7*7dfb9911SJimmy Brisson #ifndef TRNG_SVC_H 8*7dfb9911SJimmy Brisson #define TRNG_SVC_H 9*7dfb9911SJimmy Brisson 10*7dfb9911SJimmy Brisson #include <stdbool.h> 11*7dfb9911SJimmy Brisson #include <stdint.h> 12*7dfb9911SJimmy Brisson 13*7dfb9911SJimmy Brisson #include <lib/smccc.h> 14*7dfb9911SJimmy Brisson 15*7dfb9911SJimmy Brisson /* SMC function IDs for TRNG queries */ 16*7dfb9911SJimmy Brisson #define ARM_TRNG_VERSION U(0x84000050) 17*7dfb9911SJimmy Brisson #define ARM_TRNG_FEATURES U(0x84000051) 18*7dfb9911SJimmy Brisson #define ARM_TRNG_GET_UUID U(0x84000052) 19*7dfb9911SJimmy Brisson #define ARM_TRNG_RND32 U(0x84000053) 20*7dfb9911SJimmy Brisson #define ARM_TRNG_RND64 U(0xc4000053) 21*7dfb9911SJimmy Brisson 22*7dfb9911SJimmy Brisson /* TRNG version numbers */ 23*7dfb9911SJimmy Brisson #define TRNG_VERSION_MAJOR (0x1) 24*7dfb9911SJimmy Brisson #define TRNG_VERSION_MINOR (0x0) 25*7dfb9911SJimmy Brisson 26*7dfb9911SJimmy Brisson /* TRNG Error Numbers */ 27*7dfb9911SJimmy Brisson #define TRNG_E_SUCCESS (0) 28*7dfb9911SJimmy Brisson #define TRNG_E_NOT_SUPPORTED (-1) 29*7dfb9911SJimmy Brisson #define TRNG_E_INVALID_PARAMS (-2) 30*7dfb9911SJimmy Brisson #define TRNG_E_NO_ENTROPY (-3) 31*7dfb9911SJimmy Brisson #define TRNG_E_NOT_IMPLEMENTED (-4) 32*7dfb9911SJimmy Brisson 33*7dfb9911SJimmy Brisson #if TRNG_SUPPORT 34*7dfb9911SJimmy Brisson void trng_setup(void); 35*7dfb9911SJimmy Brisson bool is_trng_fid(uint32_t smc_fid); 36*7dfb9911SJimmy Brisson #else 37*7dfb9911SJimmy Brisson static inline void trng_setup(void) 38*7dfb9911SJimmy Brisson { 39*7dfb9911SJimmy Brisson } 40*7dfb9911SJimmy Brisson 41*7dfb9911SJimmy Brisson static inline bool is_trng_fid(uint32_t smc_fid) 42*7dfb9911SJimmy Brisson { 43*7dfb9911SJimmy Brisson return false; 44*7dfb9911SJimmy Brisson } 45*7dfb9911SJimmy Brisson #endif 46*7dfb9911SJimmy Brisson uintptr_t trng_smc_handler( 47*7dfb9911SJimmy Brisson uint32_t smc_fid, 48*7dfb9911SJimmy Brisson u_register_t x1, 49*7dfb9911SJimmy Brisson u_register_t x2, 50*7dfb9911SJimmy Brisson u_register_t x3, 51*7dfb9911SJimmy Brisson u_register_t x4, 52*7dfb9911SJimmy Brisson void *cookie, 53*7dfb9911SJimmy Brisson void *handle, 54*7dfb9911SJimmy Brisson u_register_t flags 55*7dfb9911SJimmy Brisson ); 56*7dfb9911SJimmy Brisson 57*7dfb9911SJimmy Brisson #endif /* TRNG_SVC_H */ 58