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/** @file
Provides the parent dispatch service for a given SMI source generator.
Copyright (c) 2007 - 2009, 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.
@par Revision Reference:
This Protocol is defined in Framework for EFI SMM Core Interface Spec
Version 0.9.
**/
#ifndef _EFI_SMM_SW_DISPATCH_H_
#define _EFI_SMM_SW_DISPATCH_H_
//
// Global ID for the SW SMI Protocol
//
#define EFI_SMM_SW_DISPATCH_PROTOCOL_GUID \
{ \
0xe541b773, 0xdd11, 0x420c, {0xb0, 0x26, 0xdf, 0x99, 0x36, 0x53, 0xf8, 0xbf } \
}
typedef struct _EFI_SMM_SW_DISPATCH_PROTOCOL EFI_SMM_SW_DISPATCH_PROTOCOL;
//
// Related Definitions
//
//
// A particular chipset may not support all possible software SMI input values.
// For example, the ICH supports only values 00h to 0FFh. The parent only allows a single
// child registration for each SwSmiInputValue.
//
typedef struct {
UINTN SwSmiInputValue;
} EFI_SMM_SW_DISPATCH_CONTEXT;
//
// Member functions
//
/**
Dispatch function for a Software SMI handler.
@param DispatchHandle Handle of this dispatch function.
@param DispatchContext Pointer to the dispatch function's context.
The SwSmiInputValue field is filled in
by the software dispatch driver prior to
invoking this dispatch function.
The dispatch function will only be called
for input values for which it is registered.
@return None
**/
typedef
VOID
(EFIAPI *EFI_SMM_SW_DISPATCH)(
IN EFI_HANDLE DispatchHandle,
IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext
);
/**
Register a child SMI source dispatch function with a parent SMM driver
@param This Pointer to the EFI_SMM_SW_DISPATCH_PROTOCOL instance.
@param DispatchFunction Function to install.
@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 which Software SMI input value the
dispatch function should be invoked for.
@param DispatchHandle 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 SW 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 SW SMI input value
is not within valid range.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_SW_REGISTER)(
IN EFI_SMM_SW_DISPATCH_PROTOCOL *This,
IN EFI_SMM_SW_DISPATCH DispatchFunction,
IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext,
OUT EFI_HANDLE *DispatchHandle
);
/**
Unregister a child SMI source dispatch function with a parent SMM driver
@param This Pointer to the EFI_SMM_SW_DISPATCH_PROTOCOL instance.
@param DispatchHandle 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 Handle is invalid.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_SW_UNREGISTER)(
IN EFI_SMM_SW_DISPATCH_PROTOCOL *This,
IN EFI_HANDLE DispatchHandle
);
//
// Interface structure for the SMM Software SMI Dispatch Protocol
//
/**
Provides the parent dispatch service for a given SMI source generator.
**/
///
/// Inconsistent with specification here:
/// In framework spec SmmCis, this definition is named as _EFI_SMM_ICHN_DISPATCH_PROTOCOL by mistake.
///
struct _EFI_SMM_SW_DISPATCH_PROTOCOL {
///
/// Installs a child service to be dispatched by this protocol.
///
EFI_SMM_SW_REGISTER Register;
///
/// Removes a child service dispatched by this protocol.
///
EFI_SMM_SW_UNREGISTER UnRegister;
///
/// A read-only field that describes the maximum value that can be used
/// in the EFI_SMM_SW_DISPATCH_PROTOCOL.Register() service.
///
UINTN MaximumSwiValue;
};
extern EFI_GUID gEfiSmmSwDispatchProtocolGuid;
#endif
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