3cbfba02fe
https://svn.code.sf.net/p/edk2/code/trunk/edk2/, which are for MinnowBoard MAX open source project. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: David Wei <david.wei@intel.com> Reviewed-by: Mike Wu <mike.wu@intel.com> Reviewed-by: Hot Tian <hot.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16599 6f19259b-4bc3-4df7-8a09-765794883524
130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
/**
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**/
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/**
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Copyright (c) 2012 - 2014, Intel Corporation. All rights reserved
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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@file
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ActiveBios.h
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@brief
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This protocol is used to report and control what BIOS is mapped to the
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BIOS address space anchored at 4GB boundary.
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This protocol is EFI compatible.
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E.G. For current generation ICH, the 4GB-16MB to 4GB range can be mapped
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to PCI, SPI, or FWH.
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**/
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#ifndef _EFI_ACTIVE_BIOS_PROTOCOL_H_
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#define _EFI_ACTIVE_BIOS_PROTOCOL_H_
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//
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#define EFI_ACTIVE_BIOS_PROTOCOL_GUID \
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{ \
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0xebbe2d1b, 0x1647, 0x4bda, 0xab, 0x9a, 0x78, 0x63, 0xe3, 0x96, 0xd4, 0x1a \
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}
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extern EFI_GUID gEfiActiveBiosProtocolGuid;
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///
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/// Forward reference for ANSI C compatibility
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///
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typedef struct _EFI_ACTIVE_BIOS_PROTOCOL EFI_ACTIVE_BIOS_PROTOCOL;
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///
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/// Protocol definitions
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///
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typedef enum {
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ActiveBiosStateSpi,
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ActiveBiosStatePci, /// Obsolete since VLV
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ActiveBiosStateLpc,
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ActiveBiosStateMax
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} EFI_ACTIVE_BIOS_STATE;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_ACTIVE_BIOS_SET_ACTIVE_BIOS_STATE) (
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IN EFI_ACTIVE_BIOS_PROTOCOL * This,
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IN EFI_ACTIVE_BIOS_STATE DesiredState,
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IN UINTN Key
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)
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/**
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@brief
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Change the current active BIOS settings to the requested state.
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The caller is responsible for requesting a supported state from
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the EFI_ACTIVE_BIOS_STATE selections.
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This will fail if someone has locked the interface and the correct key is
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not provided.
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@param[in] This Pointer to the EFI_ACTIVE_BIOS_PROTOCOL instance.
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@param[in] DesiredState The requested state to configure the system for.
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@param[in] Key If the interface is locked, Key must be the Key
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returned from the LockState function call.
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@retval EFI_SUCCESS The function completed successfully
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@retval EFI_ACCESS_DENIED The interface is currently locked.
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**/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_ACTIVE_BIOS_LOCK_ACTIVE_BIOS_STATE) (
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IN EFI_ACTIVE_BIOS_PROTOCOL * This,
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IN BOOLEAN Lock,
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IN OUT UINTN *Key
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);
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/**
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@brief
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Lock the current active BIOS state from further changes. This allows a
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caller to implement a critical section. This is optionally supported
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functionality. Size conscious implementations may choose to require
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callers cooperate without support from this protocol.
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@param[in] This Pointer to the EFI_ACTIVE_BIOS_PROTOCOL instance.
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@param[in] Lock TRUE to lock the current state, FALSE to unlock.
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@param[in] Key If Lock is TRUE, then a key will be returned. If
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Lock is FALSE, the key returned from the prior call
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to lock the protocol must be provided to unlock the
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protocol. The value of Key is undefined except that
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it cannot be 0.
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@retval EFI_SUCCESS Command succeed.
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@exception EFI_UNSUPPORTED The function is not supported.
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@retval EFI_ACCESS_DENIED The interface is currently locked.
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@retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
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**/
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///
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/// Protocol definition
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///
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/// Note that some functions are optional. This means that they may be NULL.
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/// Caller is required to verify that an optional function is defined by checking
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/// that the value is not NULL.
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///
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struct _EFI_ACTIVE_BIOS_PROTOCOL {
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EFI_ACTIVE_BIOS_STATE State;
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EFI_ACTIVE_BIOS_SET_ACTIVE_BIOS_STATE SetState;
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EFI_ACTIVE_BIOS_LOCK_ACTIVE_BIOS_STATE LockState;
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};
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#endif
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