IntelFrameworkPkg/Include/Protocol/SmmPowerButtonDispatch.h

   1 /** @file
   2   Provides the parent dispatch service for the power button SMI source generator.
   3
   4   @par Revision Reference:
   5   This Protocol is defined in Framework of EFI SMM Core Interface Spec
   6   Version 0.9.
   7
   8 Copyright (c) 2007, Intel Corporation
   9 All rights reserved. This program and the accompanying materials
  10 are licensed and made available under the terms and conditions of the BSD License
  11 which accompanies this distribution.  The full text of the license may be found at
  12 http://opensource.org/licenses/bsd-license.php
  13
  14 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  15 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  16
  17 **/
  18
  19 #ifndef _EFI_SMM_POWER_BUTTON_DISPATCH_H_
  20 #define _EFI_SMM_POWER_BUTTON_DISPATCH_H_
  21
  22 #include <PiDxe.h>
  23
  24 //
  25 // Global ID for the Power Button SMI Protocol
  26 //
  27 #define EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL_GUID \
  28   { \
  29     0xb709efa0, 0x47a6, 0x4b41, {0xb9, 0x31, 0x12, 0xec, 0xe7, 0xa8, 0xee, 0x56 } \
  30   }
  31
  32 typedef struct _EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL  EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL;
  33
  34 //
  35 // Related Definitions
  36 //
  37 //
  38 // Power Button. Example, Use for changing LEDs before ACPI OS is on.
  39 //    - DXE/BDS Phase
  40 //    - OS Install Phase
  41 //
  42 typedef enum {
  43   PowerButtonEntry,
  44   PowerButtonExit
  45 } EFI_POWER_BUTTON_PHASE;
  46
  47 typedef struct {
  48   EFI_POWER_BUTTON_PHASE  Phase;
  49 } EFI_SMM_POWER_BUTTON_DISPATCH_CONTEXT;
  50
  51 //
  52 // Member functions
  53 //
  54 /**
  55   Dispatch function for a Power Button SMI handler.
  56
  57   @param[in]  DispatchHandle        Handle of this dispatch function.
  58   @param[in]  DispatchContext       Pointer to the dispatch function's context.
  59                                     The DispatchContext fields are filled in
  60                                     by the dispatching driver prior to
  61                                     invoking this dispatch function.
  62
  63 **/
  64 typedef
  65 VOID
  66 (EFIAPI *EFI_SMM_POWER_BUTTON_DISPATCH)(
  67   IN  EFI_HANDLE                             DispatchHandle,
  68   IN  EFI_SMM_POWER_BUTTON_DISPATCH_CONTEXT  *DispatchContext
  69   );
  70
  71 /**
  72   Provides the parent dispatch service for a given SMI source generator
  73
  74   @param[in]   This                  Pointer to the EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL instance.
  75   @param[in]   DispatchFunction      Function to install.
  76   @param[in]   DispatchContext       Pointer to the dispatch function's context.
  77                                      The caller fills this context in before calling
  78                                      the register function to indicate to the register
  79                                      function the Power Button SMI phase for which the dispatch
  80                                      function should be invoked.
  81   @param[out]  DispatchHandle        Handle generated by the dispatcher to track the function instance.
  82
  83   @retval      EFI_SUCCESS           The dispatch function has been successfully
  84                                      registered and the SMI source has been enabled.
  85   @retval      EFI_DEVICE_ERROR      The driver was unable to enable the SMI source.
  86   @retval      EFI_OUT_OF_RESOURCES  Not enough memory (system or SMM) to manage this
  87                                      child.
  88   @retval      EFI_INVALID_PARAMETER DispatchContext is invalid. The Power Button SMI
  89                                      phase is not within valid range.
  90
  91 **/
  92 typedef
  93 EFI_STATUS
  94 (EFIAPI *EFI_SMM_POWER_BUTTON_REGISTER)(
  95   IN EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL           *This,
  96   IN EFI_SMM_POWER_BUTTON_DISPATCH                    DispatchFunction,
  97   IN EFI_SMM_POWER_BUTTON_DISPATCH_CONTEXT            *DispatchContext,
  98   OUT EFI_HANDLE                                      *DispatchHandle
  99   );
 100
 101 /**
 102   Unregisters a power-button service.
 103
 104   @param[in]  This                  Pointer to the EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL instance.
 105   @param[in]  DispatchHandle        Handle of the service to remove.
 106
 107   @retval     EFI_SUCCESS           The dispatch function has been successfully
 108                                     unregistered and the SMI source has been
 109                                     disabled if there are no other registered
 110                                     child dispatch functions for this SMI
 111                                     source.
 112   @retval     EFI_INVALID_PARAMETER Handle is invalid.
 113
 114 **/
 115 typedef
 116 EFI_STATUS
 117 (EFIAPI *EFI_SMM_POWER_BUTTON_UNREGISTER)(
 118   IN EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL            *This,
 119   IN EFI_HANDLE                                        DispatchHandle
 120   );
 121
 122 /**
 123   @par Protocol Description:
 124   Provides the parent dispatch service for the SMM power button SMI source generator.
 125
 126 **/
 127 struct _EFI_SMM_POWER_BUTTON_DISPATCH_PROTOCOL {
 128   ///
 129   ///  Installs a child service to be dispatched by this protocol.
 130   ///
 131   EFI_SMM_POWER_BUTTON_REGISTER   Register;
 132
 133   ///
 134   ///  Removes a child service dispatched by this protocol.
 135   ///
 136   EFI_SMM_POWER_BUTTON_UNREGISTER UnRegister;
 137 };
 138
 139 extern EFI_GUID gEfiSmmPowerButtonDispatchProtocolGuid;
 140
 141 #endif