projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 9301e564 RC |
1 | #------------------------------------------------------------------------------\r |
| 2 | #\r | |
| 3 | # ArmRndr() for AArch64\r | |
| 4 | #\r | |
| 5 | # Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>\r | |
| 6 | #\r | |
| 7 | # SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 8 | #\r | |
| 9 | #------------------------------------------------------------------------------\r | |
| 10 | \r | |
| 11 | #include "BaseRngLibInternals.h"\r | |
| 12 | \r | |
| 13 | .text\r | |
| 14 | .p2align 2\r | |
| 15 | GCC_ASM_EXPORT(ArmRndr)\r | |
| 16 | \r | |
| 17 | #/**\r | |
| 18 | # Generates a random number using RNDR.\r | |
| 19 | # Returns TRUE on success; FALSE on failure.\r | |
| 20 | #\r | |
| 21 | # @param[out] Rand Buffer pointer to store the 64-bit random value.\r | |
| 22 | #\r | |
| 23 | # @retval TRUE Random number generated successfully.\r | |
| 24 | # @retval FALSE Failed to generate the random number.\r | |
| 25 | #\r | |
| 26 | #**/\r | |
| 27 | #BOOLEAN\r | |
| 28 | #EFIAPI\r | |
| 29 | #ArmRndr (\r | |
| 30 | # OUT UINT64 *Rand\r | |
| 31 | # );\r | |
| 32 | #\r | |
| 33 | ASM_PFX(ArmRndr):\r | |
| 34 | mrs x1, RNDR\r | |
| 35 | str x1, [x0]\r | |
| 36 | cset x0, ne // RNDR sets NZCV to 0b0100 on failure\r | |
| 37 | ret\r |