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138 lines
5.0 KiB
C
138 lines
5.0 KiB
C
/** @file
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This file declares Smm Gpi Smi Child Protocol.
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The EFI_SMM_GPI_DISPATCH_PROTOCOL is defined in Framework of EFI SMM Core Interface Spec
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Version 0.9. It provides the ability to install child handlers for the given event types.
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Several inputs can be enabled. This purpose of this interface is to generate an
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SMI in response to any of these inputs having a true value provided.
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Copyright (c) 2007 - 2009, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _SMM_GPI_DISPATCH_H_
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#define _SMM_GPI_DISPATCH_H_
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#include <PiDxe.h>
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//
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// Global ID for the GPI SMI Protocol
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//
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#define EFI_SMM_GPI_DISPATCH_PROTOCOL_GUID \
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{ \
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0xe0744b81, 0x9513, 0x49cd, {0x8c, 0xea, 0xe9, 0x24, 0x5e, 0x70, 0x39, 0xda } \
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}
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typedef struct _EFI_SMM_GPI_DISPATCH_PROTOCOL EFI_SMM_GPI_DISPATCH_PROTOCOL;
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//
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// Related Definitions
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//
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//
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// GpiMask is a bit mask of 32 possible general purpose inputs that can generate a
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// a SMI. Bit 0 corresponds to logical GPI[0], 1 corresponds to logical GPI[1], etc.
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//
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// The logical GPI index to physical pin on device is described by the GPI device name
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// found on the same handle as the GpiSmi child dispatch protocol. The GPI device name
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// is defined as protocol with a GUID name and NULL protocol pointer.
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//
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typedef struct {
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UINTN GpiNum;
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} EFI_SMM_GPI_DISPATCH_CONTEXT;
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//
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// Member functions
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//
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/**
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Dispatch function for a GPI SMI handler.
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@param DispatchHandle Handle of this dispatch function.
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@param DispatchContext Pointer to the dispatch function's context.
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The DispatchContext fields are filled in by the dispatching driver prior to
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invoking this dispatch function.
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**/
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typedef
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VOID
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(EFIAPI *EFI_SMM_GPI_DISPATCH)(
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IN EFI_HANDLE DispatchHandle,
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IN EFI_SMM_GPI_DISPATCH_CONTEXT *DispatchContext
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);
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/**
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Register a child SMI source dispatch function with a parent SMM driver
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@param This Pointer to the EFI_SMM_GPI_DISPATCH_PROTOCOL instance.
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@param DispatchFunction Function to install.
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@param DispatchContext Pointer to the dispatch function's context.
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The caller fills this context in before calling
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the register function to indicate to the register
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function the GPI(s) for which the dispatch function
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should be invoked.
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@param DispatchHandle Handle generated by the dispatcher to track the
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function instance.
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@retval EFI_SUCCESS The dispatch function has been successfully
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registered and the SMI source has been enabled.
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@retval EFI_DEVICE_ERROR The driver was unable to enable the SMI source.
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@retval EFI_OUT_OF_RESOURCES Not enough memory (system or SMM) to manage this
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child.
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@retval EFI_INVALID_PARAMETER DispatchContext is invalid. The GPI input value
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is not within valid range.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SMM_GPI_REGISTER)(
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IN EFI_SMM_GPI_DISPATCH_PROTOCOL *This,
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IN EFI_SMM_GPI_DISPATCH DispatchFunction,
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IN EFI_SMM_GPI_DISPATCH_CONTEXT *DispatchContext,
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OUT EFI_HANDLE *DispatchHandle
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);
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/**
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Unregisters a General Purpose Input (GPI) service.
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@param This Pointer to the EFI_SMM_GPI_DISPATCH_PROTOCOL instance.
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@param DispatchHandle Handle of the service to remove.
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@retval EFI_SUCCESS The dispatch function has been successfully
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unregistered and the SMI source has been disabled
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if there are no other registered child dispatch
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functions for this SMI source.
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@retval EFI_INVALID_PARAMETER DispatchHandle is invalid.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SMM_GPI_UNREGISTER)(
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IN EFI_SMM_GPI_DISPATCH_PROTOCOL *This,
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IN EFI_HANDLE DispatchHandle
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);
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//
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// Interface structure for the SMM GPI SMI Dispatch Protocol
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//
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struct _EFI_SMM_GPI_DISPATCH_PROTOCOL {
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EFI_SMM_GPI_REGISTER Register;
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EFI_SMM_GPI_UNREGISTER UnRegister;
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///
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/// Denotes the maximum value of inputs that can have handlers attached.
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///
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UINTN NumSupportedGpis;
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};
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extern EFI_GUID gEfiSmmGpiDispatchProtocolGuid;
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#endif
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