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Last change
on this file was 108794, checked in by vboxsync, 4 weeks ago |
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Devices/EFI/FirmwareNew: Merge edk2-stable202502 from the vendor branch and make it build for the important platforms, bugref:4643
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| 1 | ;------------------------------------------------------------------------------
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| 2 | ;
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| 3 | ; ArmRndr() for AArch64
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| 4 | ;
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| 5 | ; Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
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| 6 | ;
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| 7 | ; SPDX-License-Identifier: BSD-2-Clause-Patent
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| 8 | ;
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| 9 | ;------------------------------------------------------------------------------
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| 10 |
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| 11 | #include "ArmRng.h"
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| 12 |
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| 13 | EXPORT ArmRndr
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| 14 | AREA BaseLib_LowLevel, CODE, READONLY
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| 15 |
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| 16 |
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| 17 | ;/**
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| 18 | ; Generates a random number using RNDR.
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| 19 | ; Returns TRUE on success; FALSE on failure.
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| 20 | ;
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| 21 | ; @param[out] Rand Buffer pointer to store the 64-bit random value.
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| 22 | ;
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| 23 | ; @retval TRUE Random number generated successfully.
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| 24 | ; @retval FALSE Failed to generate the random number.
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| 25 | ;
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| 26 | ;**/
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| 27 | ;BOOLEAN
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| 28 | ;EFIAPI
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| 29 | ;ArmRndr (
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| 30 | ; OUT UINT64 *Rand
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| 31 | ; );
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| 32 | ;
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| 33 | ArmRndr
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| 34 | mrs x1, RNDR
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| 35 | str x1, [x0]
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| 36 | cset x0, ne // RNDR sets NZCV to 0b0100 on failure
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| 37 | ret
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| 38 |
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| 39 | END
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