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/** @file
This file declares SMM Base abstraction protocol.
This is the base level of compatiblity for SMM drivers.
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name: SmmBase.h
@par Revision Reference:
This Protocol is defined in Framework of EFI SMM Core Interface Spec
Version 0.9.
**/
#ifndef _SMM_BASE_H_
#define _SMM_BASE_H_
#define EFI_SMM_BASE_PROTOCOL_GUID \
{ \
0x1390954D, 0xda95, 0x4227, {0x93, 0x28, 0x72, 0x82, 0xc2, 0x17, 0xda, 0xa8 } \
}
typedef struct _EFI_SMM_BASE_PROTOCOL EFI_SMM_BASE_PROTOCOL;
//
// SMM Handler Definition
//
#define EFI_HANDLER_SUCCESS 0x0000
#define EFI_HANDLER_CRITICAL_EXIT 0x0001
#define EFI_HANDLER_SOURCE_QUIESCED 0x0002
#define EFI_HANDLER_SOURCE_PENDING 0x0003
/**
Entry Point to Callback service
@param SmmImageHandle A handle allocated by the SMM infrastructure code
to uniquely designate a specific DXE SMM driver.
@param CommunicationBuffer A pointer to a collection of data in memory
that will be conveyed from a non-SMM environment into an SMM environment.
The buffer must be contiguous, physically mapped, and be a physical address.
@param SourceSize The size of the CommunicationBuffer.
@return Status code
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_CALLBACK_ENTRY_POINT) (
IN EFI_HANDLE SmmImageHandle,
IN OUT VOID *CommunicationBuffer OPTIONAL,
IN OUT UINTN *SourceSize OPTIONAL
);
//
// SMM Base Protocol Definition
//
/**
Register a given driver into SMRAM.This is the equivalent of performing
the LoadImage/StartImage into System Management Mode.
@param This Protocol instance pointer.
@param FilePath Location of the image to be installed as the handler.
@param SourceBuffer Optional source buffer in case of the image file
being in memory.
@param SourceSize Size of the source image file, if in memory.
@param ImageHandle Pointer to the handle that reflects the driver
loaded into SMM.
@param LegacyIA32Binary The binary image to load is legacy 16 bit code.
@retval EFI_SUCCESS The operation was successful.
@retval EFI_OUT_OF_RESOURCES There were no additional SMRAM resources to load the handler
@retval EFI_UNSUPPORTED This platform does not support 16-bit handlers.
@retval EFI_UNSUPPORTED In runtime.
@retval EFI_INVALID_PARAMETER The handlers was not the correct image type
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_REGISTER_HANDLER) (
IN EFI_SMM_BASE_PROTOCOL *This,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN VOID *SourceBuffer OPTIONAL,
IN UINTN SourceSize,
OUT EFI_HANDLE *ImageHandle,
IN BOOLEAN LegacyIA32Binary OPTIONAL
)
;
/**
Remove a given driver SMRAM. This is the equivalent of performing
the UnloadImage System Management Mode.
@param This Protocol instance pointer.
@param ImageHandle Pointer to the handle that reflects the driver
loaded into SMM.
@retval EFI_SUCCESS The operation was successful
@retval EFI_INVALID_PARAMETER The handler did not exist
@retval EFI_UNSUPPORTED In runtime.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_UNREGISTER_HANDLER) (
IN EFI_SMM_BASE_PROTOCOL *This,
IN EFI_HANDLE ImageHandle
)
;
/**
The SMM Inter-module Communicate Service Communicate() function
provides a services to send/received messages from a registered
EFI service. The BASE protocol driver is responsible for doing
any of the copies such that the data lives in boot-service accessible RAM.
@param This Protocol instance pointer.
@param ImageHandle Pointer to the handle that reflects the driver
loaded into SMM.
@param CommunicationBuffer Pointer to the buffer to convey into SMRAM.
@param SourceSize Size of the contents of buffer..
@retval EFI_SUCCESS The message was successfully posted
@retval EFI_INVALID_PARAMETER The buffer was NULL
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_COMMUNICATE) (
IN EFI_SMM_BASE_PROTOCOL *This,
IN EFI_HANDLE ImageHandle,
IN OUT VOID *CommunicationBuffer,
IN OUT UINTN *SourceSize
)
;
/**
Register a callback to execute within SMM.
This allows receipt of messages created with the Boot Service COMMUNICATE.
@param This Protocol instance pointer.
@param CallbackAddress Address of the callback service
@param MakeFirst If present, will stipulate that the handler is posted
to be the first module executed in the dispatch table.
@param MakeLast If present, will stipulate that the handler is posted
to be last executed in the dispatch table.
@param FloatingPointSave This is an optional parameter which informs the
EFI_SMM_ACCESS_PROTOCOL Driver core if it needs to save
the floating point register state. If any of the handlers
require this, then the state will be saved for all of the handlers.
@retval EFI_SUCCESS The operation was successful
@retval EFI_OUT_OF_RESOURCES Not enough space in the dispatch queue
@retval EFI_UNSUPPORTED In runtime.
@retval EFI_UNSUPPORTED Not in SMM.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_CALLBACK_SERVICE) (
IN EFI_SMM_BASE_PROTOCOL *This,
IN EFI_HANDLE SmmImageHandle,
IN EFI_SMM_CALLBACK_ENTRY_POINT CallbackAddress,
IN BOOLEAN MakeLast OPTIONAL,
IN BOOLEAN FloatingPointSave OPTIONAL
)
;
/**
The SmmAllocatePool() function allocates a memory region of Size bytes from memory of
type PoolType and returns the address of the allocated memory in the location referenced
by Buffer. This function allocates pages from EFI SMRAM Memory as needed to grow the
requested pool type. All allocations are eight-byte aligned.
@param This Protocol instance pointer.
@param PoolType The type of pool to allocate.
The only supported type is EfiRuntimeServicesData;
the interface will internally map this runtime request to SMRAM.
@param Size The number of bytes to allocate from the pool.
@param Buffer A pointer to a pointer to the allocated buffer if the call
succeeds; undefined otherwise.
@retval EFI_SUCCESS The requested number of bytes was allocated.
@retval EFI_OUT_OF_RESOURCES The pool requested could not be allocated.
@retval EFI_INVALID_PARAMETER PoolType was invalid.
@retval EFI_UNSUPPORTED In runtime.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_ALLOCATE_POOL) (
IN EFI_SMM_BASE_PROTOCOL *This,
IN EFI_MEMORY_TYPE PoolType,
IN UINTN Size,
OUT VOID **Buffer
)
;
/**
The SmmFreePool() function returns the memory specified by Buffer to the system.
On return, the memory's type is EFI SMRAM Memory. The Buffer that is freed must
have been allocated by SmmAllocatePool().
@param This Protocol instance pointer.
@param Buffer Pointer to the buffer allocation.
@retval EFI_SUCCESS The memory was returned to the system.
@retval EFI_INVALID_PARAMETER Buffer was invalid.
@retval EFI_UNSUPPORTED In runtime.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_FREE_POOL) (
IN EFI_SMM_BASE_PROTOCOL *This,
IN VOID *Buffer
)
;
/**
This routine tells caller if execution context is SMM or not.
@param This Protocol instance pointer.
@param InSmm Whether the caller is inside SMM for IA-32 or servicing a PMI for the Itanium processor family.
@retval EFI_SUCCESS The operation was successful
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_INSIDE_OUT) (
IN EFI_SMM_BASE_PROTOCOL *This,
OUT BOOLEAN *InSmm
)
;
/**
The GetSmstLocation() function returns the locatin of the System Management
Service Table. The use of the API is such that a driver can discover the
location of the SMST in its entry point and then cache it in some driver
global variable so that the SMST can be invoked in subsequent callbacks.
@param This Protocol instance pointer.
@param Smst Pointer to the SMST.
@retval EFI_SUCCESS The operation was successful
@retval EFI_INVALID_PARAMETER Smst was invalid.
@retval EFI_UNSUPPORTED Not in SMM.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_GET_SMST_LOCATION) (
IN EFI_SMM_BASE_PROTOCOL *This,
IN OUT EFI_SMM_SYSTEM_TABLE **Smst
)
;
/**
@par Protocol Description:
This protocol is used to install SMM handlers for support of subsequent SMI/PMI
activations. This protocol is available on both IA-32 and Itanium-based systems.
@param Register
Registers a handler to run in System Management RAM (SMRAM).
@param UnRegister
Removes a handler from execution in SMRAM.
@param Communicate
Sends/receives a message for a registered handler.
@param RegisterCallback
Registers a callback from the constructor.
@param InSmm
Detects whether the caller is inside or outside of SMM. SName
@param SmmAllocatePool
Allocates SMRAM.
@param SmmFreePool
Deallocates SMRAM.
@param GetSmstLocation
Retrieves the location of the System Management System Table (SMST).
**/
struct _EFI_SMM_BASE_PROTOCOL {
EFI_SMM_REGISTER_HANDLER Register;
EFI_SMM_UNREGISTER_HANDLER UnRegister;
EFI_SMM_COMMUNICATE Communicate;
EFI_SMM_CALLBACK_SERVICE RegisterCallback;
EFI_SMM_INSIDE_OUT InSmm;
EFI_SMM_ALLOCATE_POOL SmmAllocatePool;
EFI_SMM_FREE_POOL SmmFreePool;
EFI_SMM_GET_SMST_LOCATION GetSmstLocation;
};
extern EFI_GUID gEfiSmmBaseProtocolGuid;
#endif
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