123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657 |
- /** @file
- PC/AT CMOS access routines
- Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
- Copyright (c) 2019, Citrix Systems, Inc.
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include "Cmos.h"
- #include "Library/IoLib.h"
- /**
- Reads 8-bits of CMOS data.
- Reads the 8-bits of CMOS data at the location specified by Index.
- The 8-bit read value is returned.
- @param Index The CMOS location to read.
- @return The value read.
- **/
- UINT8
- EFIAPI
- CmosRead8 (
- IN UINTN Index
- )
- {
- IoWrite8 (0x70, (UINT8)Index);
- return IoRead8 (0x71);
- }
- /**
- Writes 8-bits of CMOS data.
- Writes 8-bits of CMOS data to the location specified by Index
- with the value specified by Value and returns Value.
- @param Index The CMOS location to write.
- @param Value The value to write to CMOS.
- @return The value written to CMOS.
- **/
- UINT8
- EFIAPI
- CmosWrite8 (
- IN UINTN Index,
- IN UINT8 Value
- )
- {
- IoWrite8 (0x70, (UINT8)Index);
- IoWrite8 (0x71, Value);
- return Value;
- }
|