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/** @file
This file declares Smm Gpi Smi Child Protocol
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name: SmmGpiDispatch.h
@par Revision Reference:
This Protocol is defined in Framework of EFI SMM Core Interface Spec
Version 0.9.
**/
#ifndef _EFI_SMM_GPI_DISPATCH_H_
#define _EFI_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 a
// a SMI. Bit 0 corresponds to logical GPI[0], 1 corresponds to logical GPI[1], etc.
//
// 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 Handle of this dispatch function.
@param DispatchContext Pointer to the dispatch function's context.
The DispatchContext fields are filled in by the dispatching driver prior to
invoking this dispatch function.
@return None
**/
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 Protocol instance pointer.
@param DispatchFunction Pointer to dispatch function to be invoked for
this SMI source
@param DispatchContext Pointer to the dispatch function's context.
The caller fills this context in before calling
the register function to indicate to the register
function the GPI(s) for which the dispatch function
should be invoked.
@param DispatchHandle Handle of dispatch function, for when interfacing
with the parent Sx state SMM driver.
@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
);
/**
Unregister a child SMI source dispatch function with a parent SMM driver
@param This Protocol instance pointer.
@param DispatchHandle Handle of dispatch function to deregister.
@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 Handle is invalid.
@retval other TBD
**/
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
//
/**
@par Protocol Description:
Provides the parent dispatch service for the General Purpose Input
(GPI) SMI source generator.
@param Register
Installs a child service to be dispatched by this protocol.
@param UnRegister
Removes a child service dispatched by this protocol.
@param NumSupportedGpis
Denotes the maximum value of inputs that can have handlers attached.
**/
struct _EFI_SMM_GPI_DISPATCH_PROTOCOL {
EFI_SMM_GPI_REGISTER Register;
EFI_SMM_GPI_UNREGISTER UnRegister;
UINTN NumSupportedGpis;
};
extern EFI_GUID gEfiSmmGpiDispatchProtocolGuid;
#endif
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