MemoryAlloc.c File Reference

#include <Uefi.h>
#include <Guid/MemoryAttributesTable.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BaseOverflowLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/OcMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>

Go to the source code of this file.

Functions
EFI_STATUS	OcAllocatePagesFromTop (IN EFI_MEMORY_TYPE MemoryType, IN UINTN Pages, IN OUT EFI_PHYSICAL_ADDRESS *Memory, IN EFI_GET_MEMORY_MAP GetMemoryMap OPTIONAL, IN EFI_ALLOCATE_PAGES AllocatePages OPTIONAL, IN CHECK_ALLOCATION_RANGE CheckRange OPTIONAL)
UINT64	OcCountRuntimePages (IN UINTN MemoryMapSize, IN EFI_MEMORY_DESCRIPTOR *MemoryMap, IN UINTN DescriptorSize, OUT UINTN *DescriptorCount OPTIONAL)
UINTN	OcCountFreePages (OUT UINTN *LowerMemory OPTIONAL)

Detailed Description

Copyright (C) 2019, vit9696. All rights reserved.

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.

Definition in file MemoryAlloc.c.

Function Documentation

OcAllocatePagesFromTop()

EFI_STATUS OcAllocatePagesFromTop	(	IN EFI_MEMORY_TYPE	MemoryType,
		IN UINTN	Pages,
		IN OUT EFI_PHYSICAL_ADDRESS *	Memory,
		IN EFI_GET_MEMORY_MAP GetMemoryMap	OPTIONAL,
		IN EFI_ALLOCATE_PAGES AllocatePages	OPTIONAL,
		IN CHECK_ALLOCATION_RANGE CheckRange	OPTIONAL )

Allocate pages from the top of physical memory up to address specified in Memory. Unlike AllocateMaxAddress, this method guarantees to choose top most address.

Parameters

[in]	MemoryType	Allocated memory type.
[in]	Pages	Amount of pages to allocate.
[in,out]	Memory	Top address for input, allocated address for output.
[in]	GetMemoryMap	Custom GetMemoryMap implementation to use, optional.
[in]	AllocatePages	Custom AllocatePages implementation to use, optional.
[in]	CheckRange	Handler allowing to not allocate select ranges, optional.

Return values

EFI_SUCCESS

on successful allocation.

Definition at line 27 of file MemoryAlloc.c.

OcCountFreePages()

UINTN OcCountFreePages

(

OUT UINTN *LowerMemory

OPTIONAL

)

Calculate number of free pages in the memory map.

Parameters

[out]

LowerMemory

Number of free pages below 4 GB, optional.

Return values

Number

of free pages.

Definition at line 148 of file MemoryAlloc.c.

OcCountRuntimePages()

UINT64 OcCountRuntimePages	(	IN UINTN	MemoryMapSize,
		IN EFI_MEMORY_DESCRIPTOR *	MemoryMap,
		IN UINTN	DescriptorSize,
		OUT UINTN *DescriptorCount	OPTIONAL )

Calculate number of runtime pages in the memory map.

Parameters

[in]	MemoryMapSize	Memory map size in bytes.
[in]	MemoryMap	Memory map to inspect.
[in]	DescriptorSize	Memory map descriptor size in bytes.
[out]	DescriptorCount	Number of relevant descriptors, optional.

Return values

Number

of runtime pages.

Definition at line 111 of file MemoryAlloc.c.