mirror of https://github.com/acidanthera/audk.git
145 lines
5.3 KiB
C
145 lines
5.3 KiB
C
/** @file
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SMM Sx Dispatch Protocol as defined in PI 1.2 Specification
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Volume 4 System Management Mode Core Interface.
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Provides the parent dispatch service for a given Sx-state source generator.
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Copyright (c) 2009, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _SMM_SX_DISPATCH2_H_
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#define _SMM_SX_DISPATCH2_H_
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#include <Pi/PiSmmCis.h>
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///
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/// Note:
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/// To avoid name conflict between PI and Framework SMM spec, the following names defined
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/// in PI 1.2 SMM spec are renamed. These renamings are not yet in a public PI spec and errta.
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///
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/// EFI_SMM_SX_REGISTER -> EFI_SMM_SX_REGISTER2
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/// EFI_SMM_SX_UNREGISTER -> EFI_SMM_SX_UNREGISTER2
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///
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#define EFI_SMM_SX_DISPATCH2_PROTOCOL_GUID \
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{ \
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0x456d2859, 0xa84b, 0x4e47, {0xa2, 0xee, 0x32, 0x76, 0xd8, 0x86, 0x99, 0x7d } \
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}
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///
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/// Sleep states S0-S5
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///
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typedef enum {
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SxS0,
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SxS1,
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SxS2,
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SxS3,
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SxS4,
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SxS5,
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EfiMaximumSleepType
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} EFI_SLEEP_TYPE;
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///
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/// Sleep state phase: entry or exit
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///
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typedef enum {
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SxEntry,
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SxExit,
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EfiMaximumPhase
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} EFI_SLEEP_PHASE;
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///
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/// The dispatch function's context
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///
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typedef struct {
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EFI_SLEEP_TYPE Type;
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EFI_SLEEP_PHASE Phase;
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} EFI_SMM_SX_REGISTER_CONTEXT;
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typedef struct _EFI_SMM_SX_DISPATCH2_PROTOCOL EFI_SMM_SX_DISPATCH2_PROTOCOL;
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/**
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Provides the parent dispatch service for a given Sx source generator.
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This service registers a function (DispatchFunction) which will be called when the sleep state
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event specified by RegisterContext is detected. On return, DispatchHandle contains a
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unique handle which may be used later to unregister the function using UnRegister().
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The DispatchFunction will be called with Context set to the same value as was passed into
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this function in RegisterContext and with CommBuffer and CommBufferSize set to
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NULL and 0 respectively.
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@param[in] This Pointer to the EFI_SMM_SX_DISPATCH2_PROTOCOL instance.
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@param[in] DispatchFunction Function to register for handler when the specified sleep state event occurs.
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@param[in] RegisterContext Pointer to the dispatch function's context.
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The caller fills this context in before calling
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the register function to indicate to the register
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function which Sx state type and phase the caller
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wishes to be called back on. For this intertace,
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the Sx driver will call the registered handlers for
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all Sx type and phases, so the Sx state handler(s)
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must check the Type and Phase field of the Dispatch
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context and act accordingly.
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@param[out] DispatchHandle Handle of dispatch function, for when interfacing
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with the parent Sx state SMM driver.
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@retval EFI_SUCCESS The dispatch function has been successfully
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registered and the SMI source has been enabled.
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@retval EFI_UNSUPPORTED The Sx driver or hardware does not support that
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Sx Type/Phase.
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@retval EFI_DEVICE_ERROR The Sx driver was unable to enable the SMI source.
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@retval EFI_INVALID_PARAMETER RegisterContext is invalid. Type & Phase are not
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within valid range.
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@retval EFI_OUT_OF_RESOURCES There is not enough memory (system or SMM) to manage this
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child.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SMM_SX_REGISTER2)(
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IN CONST EFI_SMM_SX_DISPATCH2_PROTOCOL *This,
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IN EFI_SMM_HANDLER_ENTRY_POINT2 DispatchFunction,
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IN CONST EFI_SMM_SX_REGISTER_CONTEXT *RegisterContext,
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OUT EFI_HANDLE *DispatchHandle
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);
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/**
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Unregisters an Sx-state service.
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This service removes the handler associated with DispatchHandle so that it will no longer be
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called in response to sleep event.
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@param[in] This Pointer to the EFI_SMM_SX_DISPATCH2_PROTOCOL instance.
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@param[in] DispatchHandle Handle of the service to remove.
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@retval EFI_SUCCESS The service has been successfully removed.
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@retval EFI_INVALID_PARAMETER The DispatchHandle was not valid.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SMM_SX_UNREGISTER2)(
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IN CONST EFI_SMM_SX_DISPATCH2_PROTOCOL *This,
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IN EFI_HANDLE DispatchHandle
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);
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///
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/// Interface structure for the SMM Sx Dispatch Protocol
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///
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/// The EFI_SMM_SX_DISPATCH2_PROTOCOL provides the ability to install child handlers to
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/// respond to sleep state related events.
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///
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struct _EFI_SMM_SX_DISPATCH2_PROTOCOL {
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EFI_SMM_SX_REGISTER2 Register;
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EFI_SMM_SX_UNREGISTER2 UnRegister;
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};
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extern EFI_GUID gEfiSmmSxDispatch2ProtocolGuid;
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#endif
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