mirror of https://github.com/acidanthera/audk.git
189 lines
5.1 KiB
C
189 lines
5.1 KiB
C
/** @file
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Data structure and functions to allocate and free memory space.
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Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
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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 _IMEM_H_
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#define _IMEM_H_
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//
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// +---------------------------------------------------+
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// | 0..(EfiMaxMemoryType - 1) - Normal memory type |
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// +---------------------------------------------------+
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// | EfiMaxMemoryType..0x6FFFFFFF - Invalid |
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// +---------------------------------------------------+
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// | 0x70000000..0x7FFFFFFF - OEM reserved |
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// +---------------------------------------------------+
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// | 0x80000000..0xFFFFFFFF - OS reserved |
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// +---------------------------------------------------+
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//
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#define MEMORY_TYPE_OS_RESERVED_MIN 0x80000000
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#define MEMORY_TYPE_OS_RESERVED_MAX 0xFFFFFFFF
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#define MEMORY_TYPE_OEM_RESERVED_MIN 0x70000000
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#define MEMORY_TYPE_OEM_RESERVED_MAX 0x7FFFFFFF
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//
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// MEMORY_MAP_ENTRY
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//
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#define MEMORY_MAP_SIGNATURE SIGNATURE_32('m','m','a','p')
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typedef struct {
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UINTN Signature;
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LIST_ENTRY Link;
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BOOLEAN FromPages;
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EFI_MEMORY_TYPE Type;
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UINT64 Start;
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UINT64 End;
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UINT64 VirtualStart;
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UINT64 Attribute;
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} MEMORY_MAP;
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//
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// Internal prototypes
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//
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/**
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Internal function. Used by the pool functions to allocate pages
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to back pool allocation requests.
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@param PoolType The type of memory for the new pool pages
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@param NumberOfPages No of pages to allocate
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@param Alignment Bits to align.
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@param NeedGuard Flag to indicate Guard page is needed or not
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@return The allocated memory, or NULL
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**/
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VOID *
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CoreAllocatePoolPages (
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IN EFI_MEMORY_TYPE PoolType,
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IN UINTN NumberOfPages,
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IN UINTN Alignment,
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IN BOOLEAN NeedGuard
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);
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/**
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Internal function. Frees pool pages allocated via AllocatePoolPages ()
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@param Memory The base address to free
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@param NumberOfPages The number of pages to free
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**/
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VOID
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CoreFreePoolPages (
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IN EFI_PHYSICAL_ADDRESS Memory,
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IN UINTN NumberOfPages
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);
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/**
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Internal function to allocate pool of a particular type.
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Caller must have the memory lock held
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@param PoolType Type of pool to allocate
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@param Size The amount of pool to allocate
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@param NeedGuard Flag to indicate Guard page is needed or not
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@return The allocate pool, or NULL
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**/
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VOID *
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CoreAllocatePoolI (
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IN EFI_MEMORY_TYPE PoolType,
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IN UINTN Size,
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IN BOOLEAN NeedGuard
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);
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/**
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Internal function to free a pool entry.
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Caller must have the memory lock held
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@param Buffer The allocated pool entry to free
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@param PoolType Pointer to pool type
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@retval EFI_INVALID_PARAMETER Buffer not valid
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@retval EFI_SUCCESS Buffer successfully freed.
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**/
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EFI_STATUS
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CoreFreePoolI (
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IN VOID *Buffer,
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OUT EFI_MEMORY_TYPE *PoolType OPTIONAL
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);
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/**
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Enter critical section by gaining lock on gMemoryLock.
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**/
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VOID
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CoreAcquireMemoryLock (
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VOID
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);
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/**
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Exit critical section by releasing lock on gMemoryLock.
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**/
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VOID
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CoreReleaseMemoryLock (
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VOID
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);
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/**
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Allocates pages from the memory map.
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@param Type The type of allocation to perform
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@param MemoryType The type of memory to turn the allocated pages
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into
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@param NumberOfPages The number of pages to allocate
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@param Memory A pointer to receive the base allocated memory
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address
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@param NeedGuard Flag to indicate Guard page is needed or not
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@return Status. On success, Memory is filled in with the base address allocated
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@retval EFI_INVALID_PARAMETER Parameters violate checking rules defined in
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spec.
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@retval EFI_NOT_FOUND Could not allocate pages match the requirement.
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@retval EFI_OUT_OF_RESOURCES No enough pages to allocate.
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@retval EFI_SUCCESS Pages successfully allocated.
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**/
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EFI_STATUS
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EFIAPI
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CoreInternalAllocatePages (
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IN EFI_ALLOCATE_TYPE Type,
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IN EFI_MEMORY_TYPE MemoryType,
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IN UINTN NumberOfPages,
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IN OUT EFI_PHYSICAL_ADDRESS *Memory,
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IN BOOLEAN NeedGuard
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);
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//
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// Internal Global data
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//
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extern EFI_LOCK gMemoryLock;
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extern LIST_ENTRY gMemoryMap;
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extern LIST_ENTRY mGcdMemorySpaceMap;
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#endif
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