/** @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")); | |
} | |
} | |
} |