mirror of https://github.com/acidanthera/audk.git
44 lines
829 B
C
44 lines
829 B
C
/** @file
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Provide rand noise source.
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Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/TimerLib.h>
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/**
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Get 64-bit noise source
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@param[out] Rand Buffer pointer to store 64-bit noise source
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@retval TRUE Get randomness successfully.
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@retval FALSE Failed to generate
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**/
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BOOLEAN
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EFIAPI
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GetRandomNoise64 (
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OUT UINT64 *Rand
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)
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{
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UINT32 Index;
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UINT32 *RandPtr;
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if (NULL == Rand) {
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return FALSE;
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}
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RandPtr = (UINT32 *)Rand;
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for (Index = 0; Index < 2; Index ++) {
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*RandPtr = (UINT32) ((AsmReadTsc ()) & 0xFF);
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RandPtr++;
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MicroSecondDelay (10);
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}
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return TRUE;
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}
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