/** @file
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Platform CMOS Access Library Header File.
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Copyright (c) 2019, 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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#ifndef _PLATFORM_CMOS_ACCESS_LIB_H_
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#define _PLATFORM_CMOS_ACCESS_LIB_H_
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///
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/// Flag indicating checksum calculation doesn't include this location.
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/// NOTE: If a location isn't shown in platform CMOS entry table,
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/// it means checksum calculation doesn't include the location.
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///
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#define CMOS_EXCLUDE_FROM_CHECKSUM BIT0
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///
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/// Flag indicating initialization doesn't cover this location.
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/// NOTE: If a location isn't shown in platform CMOS entry table,
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/// it means the location is initialized with CMOS_DEFAULT_VALUE (0).
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///
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#define CMOS_EXCLUDE_FROM_INIT_DATA BIT1
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///
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/// Flag indicating the location cannot be accessed.
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/// NOTE: 0x0 ~ 0xD is implictly inaccessible.
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///
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#define CMOS_EXCLUDE_FROM_ACCESS (BIT3 | CMOS_EXCLUDE_FROM_CHECKSUM | CMOS_EXCLUDE_FROM_INIT_DATA)
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///
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/// Flag indicating the checksum location
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/// NOTE: At most two entries can have this flag set.
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///
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#define CMOS_CHECKSUM_LOCATION (BIT2 | CMOS_EXCLUDE_FROM_CHECKSUM | CMOS_EXCLUDE_FROM_INIT_DATA)
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#define CMOS_DEFAULT_VALUE 0x00
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typedef struct {
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UINT8 Address;
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UINT8 DefaultValue;
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UINT8 Attributes;
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} CMOS_ENTRY;
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/**
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Return the platform CMOS entries.
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@param [out] EntryCount Return the count of platform CMOS entries.
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@return Platform CMOS entries.
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**/
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CMOS_ENTRY *
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EFIAPI
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PlatformCmosGetEntry (
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OUT UINTN *EntryCount
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);
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/**
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Return the NMI enable status.
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**/
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BOOLEAN
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EFIAPI
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PlatformCmosGetNmiState (
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VOID
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);
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#endif // _PLATFORM_CMOS_ACCESS_LIB_H_
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