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101 lines
4.0 KiB
C
101 lines
4.0 KiB
C
/** @file
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EFI MM Control Protocol as defined in the PI 1.5 specification.
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This protocol is used initiate synchronous MMI activations. This protocol could be published by a
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processor driver to abstract the MMI IPI or a driver which abstracts the ASIC that is supporting the
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APM port. Because of the possibility of performing MMI IPI transactions, the ability to generate this
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event from a platform chipset agent is an optional capability for both IA-32 and x64-based systems.
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The EFI_MM_CONTROL_PROTOCOL is produced by a runtime driver. It provides an
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abstraction of the platform hardware that generates an MMI. There are often I/O ports that, when
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accessed, will generate the MMI. Also, the hardware optionally supports the periodic generation of
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these signals.
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Copyright (c) 2017, 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 _MM_CONTROL_H_
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#define _MM_CONTROL_H_
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#include <PiDxe.h>
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#define EFI_MM_CONTROL_PROTOCOL_GUID \
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{ \
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0x843dc720, 0xab1e, 0x42cb, {0x93, 0x57, 0x8a, 0x0, 0x78, 0xf3, 0x56, 0x1b} \
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}
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typedef struct _EFI_MM_CONTROL_PROTOCOL EFI_MM_CONTROL_PROTOCOL;
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typedef UINTN EFI_MM_PERIOD;
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/**
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Invokes MMI activation from either the preboot or runtime environment.
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This function generates an MMI.
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@param[in] This The EFI_MM_CONTROL_PROTOCOL instance.
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@param[in,out] CommandPort The value written to the command port.
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@param[in,out] DataPort The value written to the data port.
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@param[in] Periodic Optional mechanism to engender a periodic stream.
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@param[in] ActivationInterval Optional parameter to repeat at this period one
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time or, if the Periodic Boolean is set, periodically.
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@retval EFI_SUCCESS The MMI/PMI has been engendered.
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@retval EFI_DEVICE_ERROR The timing is unsupported.
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@retval EFI_INVALID_PARAMETER The activation period is unsupported.
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@retval EFI_INVALID_PARAMETER The last periodic activation has not been cleared.
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@retval EFI_NOT_STARTED The MM base service has not been initialized.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_MM_ACTIVATE)(
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IN CONST EFI_MM_CONTROL_PROTOCOL *This,
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IN OUT UINT8 *CommandPort OPTIONAL,
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IN OUT UINT8 *DataPort OPTIONAL,
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IN BOOLEAN Periodic OPTIONAL,
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IN UINTN ActivationInterval OPTIONAL
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);
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/**
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Clears any system state that was created in response to the Trigger() call.
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This function acknowledges and causes the deassertion of the MMI activation source.
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@param[in] This The EFI_MM_CONTROL_PROTOCOL instance.
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@param[in] Periodic Optional parameter to repeat at this period one time
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@retval EFI_SUCCESS The MMI/PMI has been engendered.
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@retval EFI_DEVICE_ERROR The source could not be cleared.
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@retval EFI_INVALID_PARAMETER The service did not support the Periodic input argument.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_MM_DEACTIVATE)(
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IN CONST EFI_MM_CONTROL_PROTOCOL *This,
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IN BOOLEAN Periodic OPTIONAL
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);
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///
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/// The EFI_MM_CONTROL_PROTOCOL is produced by a runtime driver. It provides an
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/// abstraction of the platform hardware that generates an MMI. There are often I/O ports that, when
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/// accessed, will generate the MMI. Also, the hardware optionally supports the periodic generation of
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/// these signals.
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///
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struct _EFI_MM_CONTROL_PROTOCOL {
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EFI_MM_ACTIVATE Trigger;
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EFI_MM_DEACTIVATE Clear;
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///
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/// Minimum interval at which the platform can set the period. A maximum is not
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/// specified in that the MM infrastructure code can emulate a maximum interval that is
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/// greater than the hardware capabilities by using software emulation in the MM
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/// infrastructure code.
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///
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EFI_MM_PERIOD MinimumTriggerPeriod;
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};
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extern EFI_GUID gEfiMmControlProtocolGuid;
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#endif
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