/** @file
  Contains function prototypes for Memory Services in the SMM Core.

  This header file borrows the PiSmmCore Memory Allocation services as the primitive
  for memory allocation. 

  Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>
  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.             

**/

#ifndef _PI_SMM_CORE_MEMORY_ALLOCATION_SERVICES_H_
#define _PI_SMM_CORE_MEMORY_ALLOCATION_SERVICES_H_

//
// It should be aligned with the definition in PiSmmCore.
//
typedef struct {
  UINTN                           Signature;

  ///
  /// The ImageHandle passed into the entry point of the SMM IPL.  This ImageHandle
  /// is used by the SMM Core to fill in the ParentImageHandle field of the Loaded
  /// Image Protocol for each SMM Driver that is dispatched by the SMM Core.
  ///
  EFI_HANDLE                      SmmIplImageHandle;

  ///
  /// The number of SMRAM ranges passed from the SMM IPL to the SMM Core.  The SMM
  /// Core uses these ranges of SMRAM to initialize the SMM Core memory manager.
  ///
  UINTN                           SmramRangeCount;

  ///
  /// A table of SMRAM ranges passed from the SMM IPL to the SMM Core.  The SMM
  /// Core uses these ranges of SMRAM to initialize the SMM Core memory manager.
  ///
  EFI_SMRAM_DESCRIPTOR            *SmramRanges;

  ///
  /// The SMM Foundation Entry Point.  The SMM Core fills in this field when the 
  /// SMM Core is initialized.  The SMM IPL is responsbile for registering this entry 
  /// point with the SMM Configuration Protocol.  The SMM Configuration Protocol may 
  /// not be available at the time the SMM IPL and SMM Core are started, so the SMM IPL
  /// sets up a protocol notification on the SMM Configuration Protocol and registers 
  /// the SMM Foundation Entry Point as soon as the SMM Configuration Protocol is 
  /// available.
  ///
  EFI_SMM_ENTRY_POINT             SmmEntryPoint;
  
  ///
  /// Boolean flag set to TRUE while an SMI is being processed by the SMM Core.
  /// 
  BOOLEAN                         SmmEntryPointRegistered;

  ///
  /// Boolean flag set to TRUE while an SMI is being processed by the SMM Core.
  /// 
  BOOLEAN                         InSmm;

  ///
  /// This field is set by the SMM Core then the SMM Core is initialized.  This field is
  /// used by the SMM Base 2 Protocol and SMM Communication Protocol implementations in
  /// the SMM IPL.  
  ///
  EFI_SMM_SYSTEM_TABLE2           *Smst;

  ///
  /// This field is used by the SMM Communicatioon Protocol to pass a buffer into 
  /// a software SMI handler and for the software SMI handler to pass a buffer back to
  /// the caller of the SMM Communication Protocol.  
  ///
  VOID                            *CommunicationBuffer;

  ///
  /// This field is used by the SMM Communicatioon Protocol to pass the size of a buffer,
  /// in bytes, into a software SMI handler and for the software SMI handler to pass the 
  /// size, in bytes, of a buffer back to the caller of the SMM Communication Protocol.
  ///
  UINTN                           BufferSize;

  ///
  /// This field is used by the SMM Communication Protocol to pass the return status from
  /// a software SMI handler back to the caller of the SMM Communication Protocol.
  ///
  EFI_STATUS                      ReturnStatus;

  EFI_PHYSICAL_ADDRESS            PiSmmCoreImageBase;
  UINT64                          PiSmmCoreImageSize;
  EFI_PHYSICAL_ADDRESS            PiSmmCoreEntryPoint;
} SMM_CORE_PRIVATE_DATA;

/**
  Called to initialize the memory service.

  @param   SmramRangeCount       Number of SMRAM Regions
  @param   SmramRanges           Pointer to SMRAM Descriptors

**/
VOID
SmmInitializeMemoryServices (
  IN UINTN                 SmramRangeCount,
  IN EFI_SMRAM_DESCRIPTOR  *SmramRanges
  );

/**
  Allocates pages from the memory map.

  @param  Type                   The type of allocation to perform
  @param  MemoryType             The type of memory to turn the allocated pages
                                 into
  @param  NumberOfPages          The number of pages to allocate
  @param  Memory                 A pointer to receive the base allocated memory
                                 address

  @retval EFI_INVALID_PARAMETER  Parameters violate checking rules defined in spec.
  @retval EFI_NOT_FOUND          Could not allocate pages match the requirement.
  @retval EFI_OUT_OF_RESOURCES   No enough pages to allocate.
  @retval EFI_SUCCESS            Pages successfully allocated.

**/
EFI_STATUS
EFIAPI
SmmAllocatePages (
  IN      EFI_ALLOCATE_TYPE         Type,
  IN      EFI_MEMORY_TYPE           MemoryType,
  IN      UINTN                     NumberOfPages,
  OUT     EFI_PHYSICAL_ADDRESS      *Memory
  );

/**
  Frees previous allocated pages.

  @param  Memory                 Base address of memory being freed
  @param  NumberOfPages          The number of pages to free

  @retval EFI_NOT_FOUND          Could not find the entry that covers the range
  @retval EFI_INVALID_PARAMETER  Address not aligned
  @return EFI_SUCCESS            Pages successfully freed.

**/
EFI_STATUS
EFIAPI
SmmFreePages (
  IN      EFI_PHYSICAL_ADDRESS      Memory,
  IN      UINTN                     NumberOfPages
  );

/**
  Allocate pool of a particular type.

  @param  PoolType               Type of pool to allocate
  @param  Size                   The amount of pool to allocate
  @param  Buffer                 The address to return a pointer to the allocated
                                 pool

  @retval EFI_INVALID_PARAMETER  PoolType not valid
  @retval EFI_OUT_OF_RESOURCES   Size exceeds max pool size or allocation failed.
  @retval EFI_SUCCESS            Pool successfully allocated.

**/
EFI_STATUS
EFIAPI
SmmAllocatePool (
  IN      EFI_MEMORY_TYPE           PoolType,
  IN      UINTN                     Size,
  OUT     VOID                      **Buffer
  );

/**
  Frees pool.

  @param  Buffer                 The allocated pool entry to free

  @retval EFI_INVALID_PARAMETER  Buffer is not a valid value.
  @retval EFI_SUCCESS            Pool successfully freed.

**/
EFI_STATUS
EFIAPI
SmmFreePool (
  IN      VOID                      *Buffer
  );

#endif
