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/** @file
PC/AT CMOS access routines
Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/PlatformInitLib.h>
#include <Library/DebugLib.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
PlatformCmosRead8 (
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
PlatformCmosWrite8 (
IN UINTN Index,
IN UINT8 Value
)
{
IoWrite8 (0x70, (UINT8)Index);
IoWrite8 (0x71, Value);
return Value;
}
/**
Dump the CMOS content
*/
VOID
EFIAPI
PlatformDebugDumpCmos (
VOID
)
{
UINT32 Loop;
DEBUG ((DEBUG_INFO, "CMOS:\n"));
for (Loop = 0; Loop < 0x80; Loop++) {
if ((Loop % 0x10) == 0) {
DEBUG ((DEBUG_INFO, "%02x:", Loop));
}
DEBUG ((DEBUG_INFO, " %02x", PlatformCmosRead8 (Loop)));
if ((Loop % 0x10) == 0xf) {
DEBUG ((DEBUG_INFO, "\n"));
}
}
}
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