Minor code enhancement.

[mirror_edk2.git] / IntelFrameworkPkg / Include / Protocol / SmmSxDispatch.h

/** @file\r
  Provides the parent dispatch service for a given Sx-state source generator.\r
\r
  Copyright (c) 2007 - 2009, Intel Corporation\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
  @par Revision Reference:\r
  This Protocol is defined in Framework of EFI SMM Core Interface Spec\r
  Version 0.9.\r
\r
**/\r
\r
#ifndef _EFI_SMM_SX_DISPATCH_H_\r
#define _EFI_SMM_SX_DISPATCH_H_\r
\r
//\r
// Share some common definitions with PI SMM\r
//\r
#include <Protocol/SmmSxDispatch2.h>\r
\r
//\r
// Global ID for the Sx SMI Protocol\r
//\r
#define EFI_SMM_SX_DISPATCH_PROTOCOL_GUID \\r
  { \\r
    0x14fc52be, 0x1dc, 0x426c, {0x91, 0xae, 0xa2, 0x3c, 0x3e, 0x22, 0xa, 0xe8 } \\r
  }\r
\r
typedef struct _EFI_SMM_SX_DISPATCH_PROTOCOL  EFI_SMM_SX_DISPATCH_PROTOCOL;\r
\r
typedef struct {\r
  EFI_SLEEP_TYPE  Type;\r
  EFI_SLEEP_PHASE Phase;\r
} EFI_SMM_SX_DISPATCH_CONTEXT;\r
\r
//\r
// Member functions\r
//\r
/**\r
  Dispatch function for a Sx state SMI handler.\r
\r
  @param  DispatchHandle        Handle of this dispatch function.\r
  @param  DispatchContext       Pointer to the dispatch function's context.\r
                                The Type and Phase fields are filled in by the Sx dispatch driver\r
                                prior to invoking this dispatch function. For this interface,\r
                                the Sx driver will call the dispatch function for all Sx type\r
                                and phases, so the Sx state handler(s) must check the Type and\r
                                Phase field of EFI_SMM_SX_DISPATCH_CONTEXT and act accordingly.\r
\r
  @return None\r
\r
**/\r
typedef\r
VOID\r
(EFIAPI *EFI_SMM_SX_DISPATCH)(\r
  IN  EFI_HANDLE                    DispatchHandle,\r
  IN  EFI_SMM_SX_DISPATCH_CONTEXT   *DispatchContext\r
  );\r
\r
/**\r
  Register a child SMI source dispatch function with a parent SMM driver\r
\r
  @param  This                  Pointer to the EFI_SMM_SX_DISPATCH_PROTOCOL instance.\r
  @param  DispatchFunction      Function to install.\r
  @param  DispatchContext       Pointer to the dispatch function's context.\r
                                The caller fills in this context before calling\r
                                the register function to indicates to the register\r
                                function which Sx state type and phase the caller\r
                                wishes to be called back on. For this interface,\r
                                the Sx driver will call the registered handlers for\r
                                all Sx type and phases, so the Sx state handler(s)\r
                                must check the Type and Phase field of the Dispatch\r
                                context and act accordingly.\r
  @param  DispatchHandle        Handle of dispatch function, for interfacing\r
                                with the parent Sx state SMM driver.\r
\r
  @retval EFI_SUCCESS           The dispatch function has been successfully\r
                                registered and the SMI source has been enabled.\r
  @retval EFI_UNSUPPORTED       The Sx driver or hardware does not support that\r
                                Sx Type/Phase.\r
  @retval EFI_DEVICE_ERROR      The Sx driver was unable to enable the SMI source.\r
  @retval EFI_OUT_OF_RESOURCES  Not enough memory (system or SMM) to manage this\r
                                child.\r
  @retval EFI_INVALID_PARAMETER DispatchContext is invalid. Type & Phase are not\r
                                within valid range.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SMM_SX_REGISTER)(\r
  IN EFI_SMM_SX_DISPATCH_PROTOCOL          *This,\r
  IN EFI_SMM_SX_DISPATCH                   DispatchFunction,\r
  IN EFI_SMM_SX_DISPATCH_CONTEXT           *DispatchContext,\r
  OUT EFI_HANDLE                           *DispatchHandle\r
  );\r
\r
/**\r
  Unregisters an Sx-state service\r
\r
  @param  This                  Pointer to the EFI_SMM_SX_DISPATCH_PROTOCOL instance.\r
  @param  DispatchHandle        Handle of the service to remove.\r
\r
  @retval EFI_SUCCESS           The dispatch function has been successfully unregistered and the\r
                                SMI source has been disabled if there are no other registered child\r
                                dispatch functions for this SMI source.\r
  @retval EFI_INVALID_PARAMETER Handle is invalid.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SMM_SX_UNREGISTER)(\r
  IN EFI_SMM_SX_DISPATCH_PROTOCOL          *This,\r
  IN EFI_HANDLE                            DispatchHandle\r
  );\r
\r
//\r
// Interface structure for the SMM Child Dispatch Protocol\r
//\r
/**\r
  Provides the parent dispatch service for a given Sx-state source generator.\r
**/\r
struct _EFI_SMM_SX_DISPATCH_PROTOCOL {\r
  EFI_SMM_SX_REGISTER   Register;     ///< Installs a child service to be dispatched by this protocol.\r
  EFI_SMM_SX_UNREGISTER UnRegister;   ///< Removes a child service dispatched by this protocol.\r
};\r
\r
extern EFI_GUID gEfiSmmSxDispatchProtocolGuid;\r
\r
#endif\r