| /* SPDX-License-Identifier: BSD-3-Clause */ |
| /* |
| * Copyright (c) 2018-2019, STMicroelectronics |
| */ |
| |
| #ifndef __STM32_RNG_H__ |
| #define __STM32_RNG_H__ |
| |
| #include <stdint.h> |
| #include <stddef.h> |
| #include <tee_api_types.h> |
| #include <types_ext.h> |
| |
| /* |
| * Fill buffer with bytes from the STM32_RNG |
| * @out: Output buffer |
| * @size: Byte size of the output buffer |
| * Return a TEE_Result compliant sttus |
| */ |
| TEE_Result stm32_rng_read(uint8_t *out, size_t size); |
| |
| /* |
| * As stm32_rng_read() but excluding clocks/reset dependencies. |
| * |
| * @rng_base: Caller provides the RNG interface base address |
| * @out: Output buffer |
| * @size: Pointer to input/output byte size of the output buffer |
| * Return a TEE_Result compliant sttus |
| * |
| * When successfully returning, @size stores the number of bytes |
| * effectively generated in the output buffer @out. The input value |
| * of @size gives the size available in buffer @out. |
| */ |
| TEE_Result stm32_rng_read_raw(vaddr_t rng_base, uint8_t *out, size_t *size); |
| |
| #endif /*__STM32_RNG_H__*/ |
