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/** @file
This file declares the Smm Gpi Smi Child Protocol.
The EFI_SMM_GPI_DISPATCH_PROTOCOL is defined in Framework of EFI SMM Core Interface Spec
Version 0.9. It provides the ability to install child handlers for the given event types.
Several inputs can be enabled. This purpose of this interface is to generate an
SMI in response to any of these inputs having a true value provided.
Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _SMM_GPI_DISPATCH_H_
#define _SMM_GPI_DISPATCH_H_
//
// Global ID for the GPI SMI Protocol
//
#define EFI_SMM_GPI_DISPATCH_PROTOCOL_GUID \
{ \
0xe0744b81, 0x9513, 0x49cd, {0x8c, 0xea, 0xe9, 0x24, 0x5e, 0x70, 0x39, 0xda } \
}
typedef struct _EFI_SMM_GPI_DISPATCH_PROTOCOL EFI_SMM_GPI_DISPATCH_PROTOCOL;
//
// Related Definitions
//
//
// GpiMask is a bit mask of 32 possible general purpose inputs that can generate
// an SMI. Bit 0 corresponds to logical GPI[0], 1 corresponds to logical GPI[1], and so on.
//
// The logical GPI index to physical pin on device is described by the GPI device name
// found on the same handle as the GpiSmi child dispatch protocol. The GPI device name
// is defined as protocol with a GUID name and NULL protocol pointer.
//
typedef struct {
UINTN GpiNum;
} EFI_SMM_GPI_DISPATCH_CONTEXT;
//
// Member functions
//
/**
Dispatch function for a GPI SMI handler.
@param DispatchHandle The handle of this dispatch function.
@param DispatchContext The pointer to the dispatch function's context.
The DispatchContext fields are filled in by the
dispatching driver prior to invoking this dispatch
function.
**/
typedef
VOID
(EFIAPI *EFI_SMM_GPI_DISPATCH)(
IN EFI_HANDLE DispatchHandle,
IN EFI_SMM_GPI_DISPATCH_CONTEXT *DispatchContext
);
/**
Register a child SMI source dispatch function with a parent SMM driver
@param This The pointer to the EFI_SMM_GPI_DISPATCH_PROTOCOL instance.
@param DispatchFunction Function to install.
@param DispatchContext The pointer to the dispatch function's context.
Indicates to the register
function the GPI(s) for which the dispatch function
should be invoked.
@param DispatchHandle The handle generated by the dispatcher to track the
function instance.
@retval EFI_SUCCESS The dispatch function has been successfully
registered, and the SMI source has been enabled.
@retval EFI_DEVICE_ERROR The driver was unable to enable the SMI source.
@retval EFI_OUT_OF_RESOURCES Not enough memory (system or SMM) to manage this
child.
@retval EFI_INVALID_PARAMETER DispatchContext is invalid. The GPI input value
is not within valid range.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_GPI_REGISTER)(
IN EFI_SMM_GPI_DISPATCH_PROTOCOL *This,
IN EFI_SMM_GPI_DISPATCH DispatchFunction,
IN EFI_SMM_GPI_DISPATCH_CONTEXT *DispatchContext,
OUT EFI_HANDLE *DispatchHandle
);
/**
Unregisters a General Purpose Input (GPI) service.
@param This The pointer to the EFI_SMM_GPI_DISPATCH_PROTOCOL instance.
@param DispatchHandle The handle of the service to remove.
@retval EFI_SUCCESS The dispatch function has been successfully
unregistered, and the SMI source has been disabled,
if there are no other registered child dispatch
functions for this SMI source.
@retval EFI_INVALID_PARAMETER DispatchHandle is invalid.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_GPI_UNREGISTER)(
IN EFI_SMM_GPI_DISPATCH_PROTOCOL *This,
IN EFI_HANDLE DispatchHandle
);
//
// Interface structure for the SMM GPI SMI Dispatch Protocol
//
struct _EFI_SMM_GPI_DISPATCH_PROTOCOL {
EFI_SMM_GPI_REGISTER Register;
EFI_SMM_GPI_UNREGISTER UnRegister;
///
/// Denotes the maximum value of inputs that can have handlers attached.
///
UINTN NumSupportedGpis;
};
extern EFI_GUID gEfiSmmGpiDispatchProtocolGuid;
#endif
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