IntelFrameworkPkg/Include/Protocol/SmmSwDispatch.h

   1 /** @file
   2   Provides the parent dispatch service for a given SMI source generator.
   3
   4   Copyright (c) 2007 - 2009, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13   Module Name:  SmmSwDispatch.h
  14
  15   @par Revision Reference:
  16   This Protocol is defined in Framework for EFI SMM Core Interface Spec
  17   Version 0.9.
  18
  19 **/
  20
  21 #ifndef _EFI_SMM_SW_DISPATCH_H_
  22 #define _EFI_SMM_SW_DISPATCH_H_
  23
  24
  25 //
  26 // Global ID for the SW SMI Protocol
  27 //
  28 #define EFI_SMM_SW_DISPATCH_PROTOCOL_GUID \
  29   { \
  30     0xe541b773, 0xdd11, 0x420c, {0xb0, 0x26, 0xdf, 0x99, 0x36, 0x53, 0xf8, 0xbf } \
  31   }
  32
  33 typedef struct _EFI_SMM_SW_DISPATCH_PROTOCOL  EFI_SMM_SW_DISPATCH_PROTOCOL;
  34
  35 //
  36 // Related Definitions
  37 //
  38 //
  39 // A particular chipset may not support all possible software SMI input values.
  40 // For example, the ICH supports only values 00h to 0FFh.  The parent only allows a single
  41 // child registration for each SwSmiInputValue.
  42 //
  43 typedef struct {
  44   UINTN SwSmiInputValue;
  45 } EFI_SMM_SW_DISPATCH_CONTEXT;
  46
  47 //
  48 // Member functions
  49 //
  50 /**
  51   Dispatch function for a Software SMI handler.
  52
  53   @param  DispatchHandle        Handle of this dispatch function.
  54   @param  DispatchContext       Pointer to the dispatch function's context.
  55                                 The SwSmiInputValue field is filled in
  56                                 by the software dispatch driver prior to
  57                                 invoking this dispatch function.
  58                                 The dispatch function will only be called
  59                                 for input values for which it is registered.
  60
  61   @return None
  62
  63 **/
  64 typedef
  65 VOID
  66 (EFIAPI *EFI_SMM_SW_DISPATCH)(
  67   IN  EFI_HANDLE                    DispatchHandle,
  68   IN  EFI_SMM_SW_DISPATCH_CONTEXT   *DispatchContext
  69   );
  70
  71 /**
  72   Register a child SMI source dispatch function with a parent SMM driver
  73
  74   @param  This                  Pointer to the EFI_SMM_SW_DISPATCH_PROTOCOL instance.
  75   @param  DispatchFunction      Function to install.
  76   @param  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 which Software SMI input value the
  80                                 dispatch function should be invoked for.
  81   @param  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 SW 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 SW SMI input value
  89                                 is not within valid range.
  90
  91 **/
  92 typedef
  93 EFI_STATUS
  94 (EFIAPI *EFI_SMM_SW_REGISTER)(
  95   IN EFI_SMM_SW_DISPATCH_PROTOCOL          *This,
  96   IN EFI_SMM_SW_DISPATCH                   DispatchFunction,
  97   IN EFI_SMM_SW_DISPATCH_CONTEXT           *DispatchContext,
  98   OUT EFI_HANDLE                           *DispatchHandle
  99   );
 100
 101 /**
 102   Unregister a child SMI source dispatch function with a parent SMM driver
 103
 104   @param  This                  Pointer to the EFI_SMM_SW_DISPATCH_PROTOCOL instance.
 105   @param  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 disabled
 109                                 if there are no other registered child dispatch
 110                                 functions for this SMI source.
 111   @retval EFI_INVALID_PARAMETER Handle is invalid.
 112
 113 **/
 114 typedef
 115 EFI_STATUS
 116 (EFIAPI *EFI_SMM_SW_UNREGISTER)(
 117   IN EFI_SMM_SW_DISPATCH_PROTOCOL          *This,
 118   IN EFI_HANDLE                            DispatchHandle
 119   );
 120
 121
 122 //
 123 // Interface structure for the SMM Software SMI Dispatch Protocol
 124 //
 125 /**
 126   Provides the parent dispatch service for a given SMI source generator.
 127 **/
 128 ///
 129 /// Inconsistent with specification here:
 130 /// In framework spec SmmCis, this definition is named as _EFI_SMM_ICHN_DISPATCH_PROTOCOL by mistake.
 131 ///
 132 struct _EFI_SMM_SW_DISPATCH_PROTOCOL {
 133   ///
 134   /// Installs a child service to be dispatched by this protocol.
 135   ///
 136   EFI_SMM_SW_REGISTER   Register;
 137
 138   ///
 139   /// Removes a child service dispatched by this protocol.
 140   ///
 141   EFI_SMM_SW_UNREGISTER UnRegister;
 142
 143   ///
 144   /// A read-only field that describes the maximum value that can be used
 145   /// in the EFI_SMM_SW_DISPATCH_PROTOCOL.Register() service.
 146   ///
 147   UINTN                 MaximumSwiValue;
 148 };
 149
 150 extern EFI_GUID gEfiSmmSwDispatchProtocolGuid;
 151
 152 #endif