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git.proxmox.com Git - mirror_edk2.git/blob - OvmfPkg/PlatformPei/Cmos.c
2 PC/AT CMOS access routines
4 Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
10 #include "Library/IoLib.h"
13 Reads 8-bits of CMOS data.
15 Reads the 8-bits of CMOS data at the location specified by Index.
16 The 8-bit read value is returned.
18 @param Index The CMOS location to read.
20 @return The value read.
29 IoWrite8 (0x70, (UINT8
)Index
);
30 return IoRead8 (0x71);
34 Writes 8-bits of CMOS data.
36 Writes 8-bits of CMOS data to the location specified by Index
37 with the value specified by Value and returns Value.
39 @param Index The CMOS location to write.
40 @param Value The value to write to CMOS.
42 @return The value written to CMOS.
52 IoWrite8 (0x70, (UINT8
)Index
);
53 IoWrite8 (0x71, Value
);