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   @par Revision Reference:
  14   This Protocol is defined in Framework for EFI SMM Core Interface Spec
  15   Version 0.9.
  16
  17 **/
  18
  19 #ifndef _EFI_SMM_SW_DISPATCH_H_
  20 #define _EFI_SMM_SW_DISPATCH_H_
  21
  22
  23 //
  24 // Global ID for the SW SMI Protocol
  25 //
  26 #define EFI_SMM_SW_DISPATCH_PROTOCOL_GUID \
  27   { \
  28     0xe541b773, 0xdd11, 0x420c, {0xb0, 0x26, 0xdf, 0x99, 0x36, 0x53, 0xf8, 0xbf } \
  29   }
  30
  31 typedef struct _EFI_SMM_SW_DISPATCH_PROTOCOL  EFI_SMM_SW_DISPATCH_PROTOCOL;
  32
  33 //
  34 // Related Definitions
  35 //
  36 //
  37 // A particular chipset may not support all possible software SMI input values.
  38 // For example, the ICH supports only values 00h to 0FFh.  The parent only allows a single
  39 // child registration for each SwSmiInputValue.
  40 //
  41 typedef struct {
  42   UINTN SwSmiInputValue;
  43 } EFI_SMM_SW_DISPATCH_CONTEXT;
  44
  45 //
  46 // Member functions
  47 //
  48 /**
  49   Dispatch function for a Software SMI handler.
  50
  51   @param  DispatchHandle        Handle of this dispatch function.
  52   @param  DispatchContext       Pointer to the dispatch function's context.
  53                                 The SwSmiInputValue field is filled in
  54                                 by the software dispatch driver prior to
  55                                 invoking this dispatch function.
  56                                 The dispatch function will only be called
  57                                 for input values for which it is registered.
  58
  59   @return None
  60
  61 **/
  62 typedef
  63 VOID
  64 (EFIAPI *EFI_SMM_SW_DISPATCH)(
  65   IN  EFI_HANDLE                    DispatchHandle,
  66   IN  EFI_SMM_SW_DISPATCH_CONTEXT   *DispatchContext
  67   );
  68
  69 /**
  70   Register a child SMI source dispatch function with a parent SMM driver
  71
  72   @param  This                  Pointer to the EFI_SMM_SW_DISPATCH_PROTOCOL instance.
  73   @param  DispatchFunction      Function to install.
  74   @param  DispatchContext       Pointer to the dispatch function's context.
  75                                 The caller fills this context in before calling
  76                                 the register function to indicate to the register
  77                                 function which Software SMI input value the
  78                                 dispatch function should be invoked for.
  79   @param  DispatchHandle        Handle generated by the dispatcher to track the function instance.
  80
  81   @retval EFI_SUCCESS           The dispatch function has been successfully
  82                                 registered and the SMI source has been enabled.
  83   @retval EFI_DEVICE_ERROR      The SW driver was unable to enable the SMI source.
  84   @retval EFI_OUT_OF_RESOURCES  Not enough memory (system or SMM) to manage this
  85                                 child.
  86   @retval EFI_INVALID_PARAMETER DispatchContext is invalid. The SW SMI input value
  87                                 is not within valid range.
  88
  89 **/
  90 typedef
  91 EFI_STATUS
  92 (EFIAPI *EFI_SMM_SW_REGISTER)(
  93   IN EFI_SMM_SW_DISPATCH_PROTOCOL          *This,
  94   IN EFI_SMM_SW_DISPATCH                   DispatchFunction,
  95   IN EFI_SMM_SW_DISPATCH_CONTEXT           *DispatchContext,
  96   OUT EFI_HANDLE                           *DispatchHandle
  97   );
  98
  99 /**
 100   Unregister a child SMI source dispatch function with a parent SMM driver
 101
 102   @param  This                  Pointer to the EFI_SMM_SW_DISPATCH_PROTOCOL instance.
 103   @param  DispatchHandle        Handle of the service to remove.
 104
 105   @retval EFI_SUCCESS           The dispatch function has been successfully
 106                                 unregistered and the SMI source has been disabled
 107                                 if there are no other registered child dispatch
 108                                 functions for this SMI source.
 109   @retval EFI_INVALID_PARAMETER Handle is invalid.
 110
 111 **/
 112 typedef
 113 EFI_STATUS
 114 (EFIAPI *EFI_SMM_SW_UNREGISTER)(
 115   IN EFI_SMM_SW_DISPATCH_PROTOCOL          *This,
 116   IN EFI_HANDLE                            DispatchHandle
 117   );
 118
 119
 120 //
 121 // Interface structure for the SMM Software SMI Dispatch Protocol
 122 //
 123 /**
 124   Provides the parent dispatch service for a given SMI source generator.
 125 **/
 126 ///
 127 /// Inconsistent with specification here:
 128 /// In framework spec SmmCis, this definition is named as _EFI_SMM_ICHN_DISPATCH_PROTOCOL by mistake.
 129 ///
 130 struct _EFI_SMM_SW_DISPATCH_PROTOCOL {
 131   ///
 132   /// Installs a child service to be dispatched by this protocol.
 133   ///
 134   EFI_SMM_SW_REGISTER   Register;
 135
 136   ///
 137   /// Removes a child service dispatched by this protocol.
 138   ///
 139   EFI_SMM_SW_UNREGISTER UnRegister;
 140
 141   ///
 142   /// A read-only field that describes the maximum value that can be used
 143   /// in the EFI_SMM_SW_DISPATCH_PROTOCOL.Register() service.
 144   ///
 145   UINTN                 MaximumSwiValue;
 146 };
 147
 148 extern EFI_GUID gEfiSmmSwDispatchProtocolGuid;
 149
 150 #endif