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Maurice Ma
9a4407018d
This patch fixed NOOPT build failure for QEMU. It fixed #871. Signed-off-by: Maurice Ma <maurice.ma@intel.com>
47 lines
687 B
C
47 lines
687 B
C
/** @file
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Copyright (c) 2017, 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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/**
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Read current timestamp.
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@return 64 bit current timestampe value.
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**/
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UINT64
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EFIAPI
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ReadTimeStamp (
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VOID
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)
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{
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return AsmReadTsc();
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}
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/**
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Get timestamp frequency in KHZ.
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@return Timestamp frequency in KHZ.
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**/
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UINT32
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EFIAPI
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GetTimeStampFrequency (
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VOID
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)
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{
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UINT8 Ratio;
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Ratio = (UINT8)((UINT32)AsmReadMsr64 (0xCE) >> 8);
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if (Ratio == 0) {
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// This might be QEMU case
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Ratio = 8;
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}
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// Ratio * 100000
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return (UINT32)(Ratio * 100000);
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}
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