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Last change
on this file was 85718, checked in by vboxsync, 5 years ago |
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Devices/EFI: Merge edk-stable202005 and make it build, bugref:4643
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| 1 | /** @file
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| 2 | Provide InternalAcpiGetTimerTick for the bhyve instance of the
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| 3 | Base ACPI Timer Library
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| 4 |
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| 5 | Copyright (C) 2020, Rebecca Cran <[email protected]>
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| 6 | Copyright (C) 2014, Gabriel L. Somlo <[email protected]>
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| 7 |
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| 8 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 9 | **/
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| 10 |
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| 11 | #include <Library/IoLib.h>
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| 12 | #include <OvmfPlatforms.h>
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| 13 |
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| 14 | /**
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| 15 | Internal function to read the current tick counter of ACPI.
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| 16 |
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| 17 | Read the current ACPI tick counter using the counter address cached
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| 18 | by this instance's constructor.
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| 19 |
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| 20 | @return The tick counter read.
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| 21 |
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| 22 | **/
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| 23 | UINT32
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| 24 | InternalAcpiGetTimerTick (
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| 25 | VOID
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| 26 | )
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| 27 | {
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| 28 | //
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| 29 | // Return the current ACPI timer value.
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| 30 | //
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| 31 | return IoRead32 (BHYVE_ACPI_TIMER_IO_ADDR);
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| 32 | }
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