656419f922
BhyvePkg supports the bhyve hypervisor, which is a hypervisor/virtual machine manager available on FreeBSD, macOS and Illumos. Signed-off-by: Rebecca Cran <rebecca@bsdio.com> Message-Id: <20200713054131.479627-2-rebecca@bsdio.com> Acked-by: Laszlo Ersek <lersek@redhat.com>
59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
/** @file
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PC/AT CMOS access routines
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Copyright (c) 2006 - 2009, 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 "Cmos.h"
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#include "Library/IoLib.h"
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/**
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Reads 8-bits of CMOS data.
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Reads the 8-bits of CMOS data at the location specified by Index.
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The 8-bit read value is returned.
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@param Index The CMOS location to read.
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@return The value read.
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**/
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UINT8
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EFIAPI
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CmosRead8 (
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IN UINTN Index
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)
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{
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IoWrite8 (0x70, (UINT8) Index);
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return IoRead8 (0x71);
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}
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/**
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Writes 8-bits of CMOS data.
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Writes 8-bits of CMOS data to the location specified by Index
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with the value specified by Value and returns Value.
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@param Index The CMOS location to write.
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@param Value The value to write to CMOS.
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@return The value written to CMOS.
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**/
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UINT8
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EFIAPI
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CmosWrite8 (
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IN UINTN Index,
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IN UINT8 Value
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)
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{
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IoWrite8 (0x70, (UINT8) Index);
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IoWrite8 (0x71, Value);
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return Value;
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}
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