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                                 Indicates to the register
  76                                 function the Software SMI input value for which to invoke the
  77                                 dispatch function.
  78   @param  DispatchHandle        Handle generated by the dispatcher to track the function instance.
  79
  80   @retval EFI_SUCCESS           The dispatch function has been successfully
  81                                 registered and the SMI source has been enabled.
  82   @retval EFI_DEVICE_ERROR      The SW driver could not enable the SMI source.
  83   @retval EFI_OUT_OF_RESOURCES  Not enough memory (system or SMM) to manage this
  84                                 child.
  85   @retval EFI_INVALID_PARAMETER DispatchContext is invalid. The SW SMI input value
  86                                 is not within valid range.
  87
  88 **/
  89 typedef
  90 EFI_STATUS
  91 (EFIAPI *EFI_SMM_SW_REGISTER)(
  92   IN EFI_SMM_SW_DISPATCH_PROTOCOL          *This,
  93   IN EFI_SMM_SW_DISPATCH                   DispatchFunction,
  94   IN EFI_SMM_SW_DISPATCH_CONTEXT           *DispatchContext,
  95   OUT EFI_HANDLE                           *DispatchHandle
  96   );
  97
  98 /**
  99   Unregister a child SMI source dispatch function with a parent SMM driver
 100
 101   @param  This                  Pointer to the EFI_SMM_SW_DISPATCH_PROTOCOL instance.
 102   @param  DispatchHandle        Handle of the service to remove.
 103
 104   @retval EFI_SUCCESS           The dispatch function has been successfully
 105                                 unregistered and the SMI source has been disabled
 106                                 if there are no other registered child dispatch
 107                                 functions for this SMI source.
 108   @retval EFI_INVALID_PARAMETER Handle is invalid.
 109
 110 **/
 111 typedef
 112 EFI_STATUS
 113 (EFIAPI *EFI_SMM_SW_UNREGISTER)(
 114   IN EFI_SMM_SW_DISPATCH_PROTOCOL          *This,
 115   IN EFI_HANDLE                            DispatchHandle
 116   );
 117
 118
 119 //
 120 // Interface structure for the SMM Software SMI Dispatch Protocol
 121 //
 122 /**
 123   Provides the parent dispatch service for a given SMI source generator.
 124 **/
 125 ///
 126 /// Inconsistent with specification here:
 127 /// In framework spec SmmCis, this definition is named as _EFI_SMM_ICHN_DISPATCH_PROTOCOL by mistake.
 128 ///
 129 struct _EFI_SMM_SW_DISPATCH_PROTOCOL {
 130   ///
 131   /// Installs a child service to be dispatched by this protocol.
 132   ///
 133   EFI_SMM_SW_REGISTER   Register;
 134
 135   ///
 136   /// Removes a child service dispatched by this protocol.
 137   ///
 138   EFI_SMM_SW_UNREGISTER UnRegister;
 139
 140   ///
 141   /// A read-only field that describes the maximum value that can be used
 142   /// in the EFI_SMM_SW_DISPATCH_PROTOCOL.Register() service.
 143   ///
 144   UINTN                 MaximumSwiValue;
 145 };
 146
 147 extern EFI_GUID gEfiSmmSwDispatchProtocolGuid;
 148
 149 #endif