MmControl.h File Reference

Data Structures
struct	_EFI_MM_CONTROL_PROTOCOL

Macros
#define	EFI_MM_CONTROL_PROTOCOL_GUID

Typedefs
typedef struct _EFI_MM_CONTROL_PROTOCOL	EFI_MM_CONTROL_PROTOCOL
typedef UINTN	EFI_MM_PERIOD
typedef EFI_STATUS(EFIAPI *	EFI_MM_ACTIVATE )(IN CONST EFI_MM_CONTROL_PROTOCOL *This, IN OUT UINT8 *CommandPort, IN OUT UINT8 *DataPort, IN BOOLEAN Periodic, IN UINTN ActivationInterval)
typedef EFI_STATUS(EFIAPI *	EFI_MM_DEACTIVATE )(IN CONST EFI_MM_CONTROL_PROTOCOL *This, IN BOOLEAN Periodic)

Variables
EFI_GUID	gEfiMmControlProtocolGuid

Detailed Description

EFI MM Control Protocol as defined in the PI 1.5 specification.

This protocol is used initiate synchronous MMI activations. This protocol could be published by a processor driver to abstract the MMI IPI or a driver which abstracts the ASIC that is supporting the APM port. Because of the possibility of performing MMI IPI transactions, the ability to generate this event from a platform chipset agent is an optional capability for both IA-32 and x64-based systems.

The EFI_MM_CONTROL_PROTOCOL is produced by a runtime driver. It provides an abstraction of the platform hardware that generates an MMI. There are often I/O ports that, when accessed, will generate the MMI. Also, the hardware optionally supports the periodic generation of these signals.

Copyright (c) 2017, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Macro Definition Documentation

#define EFI_MM_CONTROL_PROTOCOL_GUID

Value:

{ \
    0x843dc720, 0xab1e, 0x42cb, {0x93, 0x57, 0x8a, 0x0, 0x78, 0xf3, 0x56, 0x1b}  \
  }

Typedef Documentation

typedef EFI_STATUS(EFIAPI * EFI_MM_ACTIVATE)(IN CONST EFI_MM_CONTROL_PROTOCOL *This, IN OUT UINT8 *CommandPort, IN OUT UINT8 *DataPort, IN BOOLEAN Periodic, IN UINTN ActivationInterval)

Invokes MMI activation from either the preboot or runtime environment.

This function generates an MMI.

Parameters

[in]	This	The EFI_MM_CONTROL_PROTOCOL instance.
[in,out]	CommandPort	The value written to the command port.
[in,out]	DataPort	The value written to the data port.
[in]	Periodic	Optional mechanism to engender a periodic stream.
[in]	ActivationInterval	Optional parameter to repeat at this period one time or, if the Periodic Boolean is set, periodically.

Return values

EFI_SUCCESS	The MMI/PMI has been engendered.
EFI_DEVICE_ERROR	The timing is unsupported.
EFI_INVALID_PARAMETER	The activation period is unsupported.
EFI_INVALID_PARAMETER	The last periodic activation has not been cleared.
EFI_NOT_STARTED	The MM base service has not been initialized.

typedef struct _EFI_MM_CONTROL_PROTOCOL EFI_MM_CONTROL_PROTOCOL

typedef EFI_STATUS(EFIAPI * EFI_MM_DEACTIVATE)(IN CONST EFI_MM_CONTROL_PROTOCOL *This, IN BOOLEAN Periodic)

Clears any system state that was created in response to the Trigger() call.

This function acknowledges and causes the deassertion of the MMI activation source.

Parameters

[in]	This	The EFI_MM_CONTROL_PROTOCOL instance.
[in]	Periodic	Optional parameter to repeat at this period one time

Return values

EFI_SUCCESS	The MMI/PMI has been engendered.
EFI_DEVICE_ERROR	The source could not be cleared.
EFI_INVALID_PARAMETER	The service did not support the Periodic input argument.

typedef UINTN EFI_MM_PERIOD

Variable Documentation

EFI_GUID gEfiMmControlProtocolGuid