IntelFrameworkPkg/Include/Protocol/SmmSxDispatch.h

   1 /** @file
   2   Provides the parent dispatch service for a given Sx-state 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:  SmmSxDispatch.h
  14
  15   @par Revision Reference:
  16   This Protocol is defined in Framework of EFI SMM Core Interface Spec
  17   Version 0.9.
  18
  19 **/
  20
  21 #ifndef _EFI_SMM_SX_DISPATCH_H_
  22 #define _EFI_SMM_SX_DISPATCH_H_
  23
  24 #include <PiDxe.h>
  25
  26 //
  27 // Global ID for the Sx SMI Protocol
  28 //
  29 #define EFI_SMM_SX_DISPATCH_PROTOCOL_GUID \
  30   { \
  31     0x14fc52be, 0x1dc, 0x426c, {0x91, 0xae, 0xa2, 0x3c, 0x3e, 0x22, 0xa, 0xe8 } \
  32   }
  33
  34 typedef struct _EFI_SMM_SX_DISPATCH_PROTOCOL  EFI_SMM_SX_DISPATCH_PROTOCOL;
  35 //
  36 // Related Definitions
  37 //
  38 typedef enum {
  39   SxS0,
  40   SxS1,
  41   SxS2,
  42   SxS3,
  43   SxS4,
  44   SxS5,
  45   EfiMaximumSleepType
  46 } EFI_SLEEP_TYPE;
  47
  48 typedef enum {
  49   SxEntry,
  50   SxExit,
  51   EfiMaximumPhase
  52 } EFI_SLEEP_PHASE;
  53
  54 typedef struct {
  55   EFI_SLEEP_TYPE  Type;
  56   EFI_SLEEP_PHASE Phase;
  57 } EFI_SMM_SX_DISPATCH_CONTEXT;
  58
  59 //
  60 // Member functions
  61 //
  62 /**
  63   Dispatch function for a Sx state SMI handler.
  64
  65   @param  DispatchHandle        Handle of this dispatch function.
  66   @param  DispatchContext       Pointer to the dispatch function's context.
  67                                 The Type and Phase fields are filled in by the Sx dispatch driver
  68                                 prior to invoking this dispatch function. For this interface,
  69                                 the Sx driver will call the dispatch function for all Sx type
  70                                 and phases, so the Sx state handler(s) must check the Type and
  71                                 Phase field of EFI_SMM_SX_DISPATCH_CONTEXT and act accordingly.
  72
  73   @return None
  74
  75 **/
  76 typedef
  77 VOID
  78 (EFIAPI *EFI_SMM_SX_DISPATCH)(
  79   IN  EFI_HANDLE                    DispatchHandle,
  80   IN  EFI_SMM_SX_DISPATCH_CONTEXT   *DispatchContext
  81   );
  82
  83 /**
  84   Register a child SMI source dispatch function with a parent SMM driver
  85
  86   @param  This                  Pointer to the EFI_SMM_SX_DISPATCH_PROTOCOL instance.
  87   @param  DispatchFunction      Function to install.
  88   @param  DispatchContext       Pointer to the dispatch function's context.
  89                                 The caller fills this context in before calling
  90                                 the register function to indicate to the register
  91                                 function which Sx state type and phase the caller
  92                                 wishes to be called back on. For this intertace,
  93                                 the Sx driver will call the registered handlers for
  94                                 all Sx type and phases, so the Sx state handler(s)
  95                                 must check the Type and Phase field of the Dispatch
  96                                 context and act accordingly.
  97   @param  DispatchHandle        Handle of dispatch function, for when interfacing
  98                                 with the parent Sx state SMM driver.
  99
 100   @retval EFI_SUCCESS           The dispatch function has been successfully
 101                                 registered and the SMI source has been enabled.
 102   @retval EFI_UNSUPPORTED       The Sx driver or hardware does not support that
 103                                 Sx Type/Phase.
 104   @retval EFI_DEVICE_ERROR      The Sx driver was unable to enable the SMI source.
 105   @retval EFI_OUT_OF_RESOURCES  Not enough memory (system or SMM) to manage this
 106                                 child.
 107   @retval EFI_INVALID_PARAMETER DispatchContext is invalid. Type & Phase are not
 108                                 within valid range.
 109
 110 **/
 111 typedef
 112 EFI_STATUS
 113 (EFIAPI *EFI_SMM_SX_REGISTER)(
 114   IN EFI_SMM_SX_DISPATCH_PROTOCOL          *This,
 115   IN EFI_SMM_SX_DISPATCH                   DispatchFunction,
 116   IN EFI_SMM_SX_DISPATCH_CONTEXT           *DispatchContext,
 117   OUT EFI_HANDLE                           *DispatchHandle
 118   );
 119
 120 /**
 121   Unregisters an Sx-state service
 122
 123   @param  This                  Pointer to the EFI_SMM_SX_DISPATCH_PROTOCOL instance.
 124   @param  DispatchHandle        Handle of the service to remove.
 125
 126   @retval EFI_SUCCESS           The dispatch function has been successfully unregistered and the
 127                                 SMI source has been disabled if there are no other registered child
 128                                 dispatch functions for this SMI source.
 129   @retval EFI_INVALID_PARAMETER Handle is invalid.
 130
 131 **/
 132 typedef
 133 EFI_STATUS
 134 (EFIAPI *EFI_SMM_SX_UNREGISTER)(
 135   IN EFI_SMM_SX_DISPATCH_PROTOCOL          *This,
 136   IN EFI_HANDLE                            DispatchHandle
 137   );
 138
 139 //
 140 // Interface structure for the SMM Child Dispatch Protocol
 141 //
 142 /**
 143   Provides the parent dispatch service for a given Sx-state source generator.
 144 **/
 145 struct _EFI_SMM_SX_DISPATCH_PROTOCOL {
 146   EFI_SMM_SX_REGISTER   Register;     ///< Installs a child service to be dispatched by this protocol.
 147   EFI_SMM_SX_UNREGISTER UnRegister;   ///< Removes a child service dispatched by this protocol.
 148 };
 149
 150 extern EFI_GUID gEfiSmmSxDispatchProtocolGuid;
 151
 152 #endif