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/** @file
Data structure and functions to allocate and free memory space.
Copyright (c) 2006 - 2017, 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 _IMEM_H_
#define _IMEM_H_
//
// +---------------------------------------------------+
// | 0..(EfiMaxMemoryType - 1) - Normal memory type |
// +---------------------------------------------------+
// | EfiMaxMemoryType..0x6FFFFFFF - Invalid |
// +---------------------------------------------------+
// | 0x70000000..0x7FFFFFFF - OEM reserved |
// +---------------------------------------------------+
// | 0x80000000..0xFFFFFFFF - OS reserved |
// +---------------------------------------------------+
//
#define MEMORY_TYPE_OS_RESERVED_MIN 0x80000000
#define MEMORY_TYPE_OS_RESERVED_MAX 0xFFFFFFFF
#define MEMORY_TYPE_OEM_RESERVED_MIN 0x70000000
#define MEMORY_TYPE_OEM_RESERVED_MAX 0x7FFFFFFF
//
// MEMORY_MAP_ENTRY
//
#define MEMORY_MAP_SIGNATURE SIGNATURE_32('m','m','a','p')
typedef struct {
UINTN Signature;
LIST_ENTRY Link;
BOOLEAN FromPages;
EFI_MEMORY_TYPE Type;
UINT64 Start;
UINT64 End;
UINT64 VirtualStart;
UINT64 Attribute;
} MEMORY_MAP;
//
// Internal prototypes
//
/**
Internal function. Used by the pool functions to allocate pages
to back pool allocation requests.
@param PoolType The type of memory for the new pool pages
@param NumberOfPages No of pages to allocate
@param Alignment Bits to align.
@param NeedGuard Flag to indicate Guard page is needed or not
@return The allocated memory, or NULL
**/
VOID *
CoreAllocatePoolPages (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN NumberOfPages,
IN UINTN Alignment,
IN BOOLEAN NeedGuard
);
/**
Internal function. Frees pool pages allocated via AllocatePoolPages ()
@param Memory The base address to free
@param NumberOfPages The number of pages to free
**/
VOID
CoreFreePoolPages (
IN EFI_PHYSICAL_ADDRESS Memory,
IN UINTN NumberOfPages
);
/**
Internal function to allocate pool of a particular type.
Caller must have the memory lock held
@param PoolType Type of pool to allocate
@param Size The amount of pool to allocate
@param NeedGuard Flag to indicate Guard page is needed or not
@return The allocate pool, or NULL
**/
VOID *
CoreAllocatePoolI (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN Size,
IN BOOLEAN NeedGuard
);
/**
Internal function to free a pool entry.
Caller must have the memory lock held
@param Buffer The allocated pool entry to free
@param PoolType Pointer to pool type
@retval EFI_INVALID_PARAMETER Buffer not valid
@retval EFI_SUCCESS Buffer successfully freed.
**/
EFI_STATUS
CoreFreePoolI (
IN VOID *Buffer,
OUT EFI_MEMORY_TYPE *PoolType OPTIONAL
);
/**
Enter critical section by gaining lock on gMemoryLock.
**/
VOID
CoreAcquireMemoryLock (
VOID
);
/**
Exit critical section by releasing lock on gMemoryLock.
**/
VOID
CoreReleaseMemoryLock (
VOID
);
/**
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
@param NeedGuard Flag to indicate Guard page is needed or not
@return Status. On success, Memory is filled in with the base address allocated
@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
CoreInternalAllocatePages (
IN EFI_ALLOCATE_TYPE Type,
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN NumberOfPages,
IN OUT EFI_PHYSICAL_ADDRESS *Memory,
IN BOOLEAN NeedGuard
);
//
// Internal Global data
//
extern EFI_LOCK gMemoryLock;
extern LIST_ENTRY gMemoryMap;
extern LIST_ENTRY mGcdMemorySpaceMap;
#endif
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