MdePkg/Library/BaseRngLib/AArch64/ArmRng.h

   1 /** @file
   2   Random number generator service that uses the RNDR instruction
   3   to provide pseudorandom numbers.
   4
   5   Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
   6
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #ifndef ARM_RNG_H_
  12 #define ARM_RNG_H_
  13
  14 /**
  15   Generates a random number using RNDR.
  16   Returns TRUE on success; FALSE on failure.
  17
  18   @param[out] Rand     Buffer pointer to store the 64-bit random value.
  19
  20   @retval TRUE         Random number generated successfully.
  21   @retval FALSE        Failed to generate the random number.
  22
  23 **/
  24 BOOLEAN
  25 EFIAPI
  26 ArmRndr (
  27   OUT UINT64  *Rand
  28   );
  29
  30 /**
  31   Reads the ID_AA64ISAR0 Register.
  32
  33   @return The contents of the ID_AA64ISAR0 register.
  34
  35 **/
  36 UINT64
  37 EFIAPI
  38 ArmReadIdIsar0 (
  39   VOID
  40   );
  41
  42 #endif /* ARM_RNG_H_ */