Initial import.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bbahnsen
886
MdePkg/Library/DxeMemoryAllocationLib/MemoryAllocationLib.c
Normal file
886
MdePkg/Library/DxeMemoryAllocationLib/MemoryAllocationLib.c
Normal file
@ -0,0 +1,886 @@
|
||||
/** @file
|
||||
Support routines for memory allocation routines for use with drivers.
|
||||
|
||||
Copyright (c) 2006, Intel Corporation<BR>
|
||||
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: MemoryAllocationLib.c
|
||||
|
||||
**/
|
||||
|
||||
|
||||
|
||||
/**
|
||||
Allocates the number of 4KB pages specified by Pages of a certain memory type.
|
||||
|
||||
@param MemoryType The type of memory to allocate.
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.<BR>
|
||||
If Pages is 0, then NULL is returned.<BR>
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocatePages (
|
||||
IN EFI_MEMORY_TYPE MemoryType,
|
||||
IN UINTN Pages
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
EFI_PHYSICAL_ADDRESS Memory;
|
||||
|
||||
if (Pages == 0) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
|
||||
if (EFI_ERROR (Status)) {
|
||||
Memory = 0;
|
||||
}
|
||||
return (VOID *) (UINTN) Memory;
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData.
|
||||
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.<BR>
|
||||
If Pages is 0, then NULL is returned.<BR>
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocatePages (
|
||||
IN UINTN Pages
|
||||
)
|
||||
{
|
||||
return InternalAllocatePages (EfiBootServicesData, Pages);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData.
|
||||
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.<BR>
|
||||
If Pages is 0, then NULL is returned.<BR>
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateRuntimePages (
|
||||
IN UINTN Pages
|
||||
)
|
||||
{
|
||||
return InternalAllocatePages (EfiRuntimeServicesData, Pages);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType.
|
||||
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.<BR>
|
||||
If Pages is 0, then NULL is returned.<BR>
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateReservedPages (
|
||||
IN UINTN Pages
|
||||
)
|
||||
{
|
||||
return InternalAllocatePages (EfiReservedMemoryType, Pages);
|
||||
}
|
||||
|
||||
/**
|
||||
Frees one or more 4KB pages that were previously allocated with
|
||||
one of the page allocation functions in the Memory Allocation Library.
|
||||
|
||||
@param Buffer Pointer to the buffer of pages to free.
|
||||
@param Pages The number of 4 KB pages to free.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
FreePages (
|
||||
IN VOID *Buffer,
|
||||
IN UINTN Pages
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
|
||||
ASSERT (Pages != 0);
|
||||
Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates the number of 4KB pages specified by Pages of a certian memory type
|
||||
with an alignment specified by Alignment.
|
||||
|
||||
@param MemoryType The type of memory to allocate.
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return The allocated buffer is returned.<BR>
|
||||
If Pages is 0, then NULL is returned.<BR>
|
||||
If there is not enough memory at the specified alignment remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocateAlignedPages (
|
||||
IN EFI_MEMORY_TYPE MemoryType,
|
||||
IN UINTN Pages,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
EFI_PHYSICAL_ADDRESS Memory;
|
||||
UINTN AlignedMemory;
|
||||
UINTN AlignmentMask;
|
||||
UINTN UnalignedPages;
|
||||
UINTN RealPages;
|
||||
|
||||
//
|
||||
// Alignment must be a power of two or zero.
|
||||
//
|
||||
ASSERT ((Alignment & (Alignment - 1)) == 0);
|
||||
|
||||
if (Pages == 0) {
|
||||
return NULL;
|
||||
}
|
||||
if (Alignment > EFI_PAGE_SIZE) {
|
||||
//
|
||||
// Caculate the total number of pages since alignment is larger than page size.
|
||||
//
|
||||
AlignmentMask = Alignment - 1;
|
||||
RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);
|
||||
Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return NULL;
|
||||
}
|
||||
AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;
|
||||
UnalignedPages = EFI_SIZE_TO_PAGES ((UINTN) Memory - AlignedMemory);
|
||||
if (UnalignedPages > 0) {
|
||||
//
|
||||
// Free first unaligned page(s).
|
||||
//
|
||||
Status = gBS->FreePages (Memory, UnalignedPages);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
}
|
||||
Memory = (EFI_PHYSICAL_ADDRESS) (AlignedMemory + EFI_PAGES_TO_SIZE (Pages));
|
||||
UnalignedPages = RealPages - Pages - UnalignedPages;
|
||||
if (UnalignedPages > 0) {
|
||||
//
|
||||
// Free last unaligned page(s).
|
||||
//
|
||||
Status = gBS->FreePages (Memory, UnalignedPages);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
}
|
||||
} else {
|
||||
//
|
||||
// Do not over-allocate pages in this case.
|
||||
//
|
||||
Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return NULL;
|
||||
}
|
||||
AlignedMemory = (UINTN) Memory;
|
||||
}
|
||||
return (VOID *) AlignedMemory;
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData
|
||||
with an alignment specified by Alignment.
|
||||
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return The allocated buffer is returned.<BR>
|
||||
If Pages is 0, then NULL is returned.<BR>
|
||||
If there is not enough memory at the specified alignment remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedPages (
|
||||
IN UINTN Pages,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedPages (EfiBootServicesData, Pages, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData
|
||||
with an alignment specified by Alignment.
|
||||
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return The allocated buffer is returned. If Pages is 0, then NULL is returned.
|
||||
If there is not enough memory at the specified alignment remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedRuntimePages (
|
||||
IN UINTN Pages,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.
|
||||
|
||||
@param Pages The number of 4 KB pages to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return The allocated buffer is returned. If Pages is 0, then NULL is returned.
|
||||
If there is not enough memory at the specified alignment remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedReservedPages (
|
||||
IN UINTN Pages,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Frees one or more 4KB pages that were previously allocated with
|
||||
one of the aligned page allocation functions in the Memory Allocation Library.
|
||||
|
||||
@param Buffer Pointer to the buffer of pages to free.
|
||||
@param Pages The number of 4 KB pages to free.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
FreeAlignedPages (
|
||||
IN VOID *Buffer,
|
||||
IN UINTN Pages
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
|
||||
ASSERT (Pages != 0);
|
||||
Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of a certain memory type.
|
||||
|
||||
@param MemoryType The type of memory to allocate.
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocatePool (
|
||||
IN EFI_MEMORY_TYPE MemoryType,
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
VOID *Memory;
|
||||
|
||||
Status = gBS->AllocatePool (MemoryType, AllocationSize, &Memory);
|
||||
if (EFI_ERROR (Status)) {
|
||||
Memory = NULL;
|
||||
}
|
||||
return Memory;
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of type EfiBootServicesData.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocatePool (
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
return InternalAllocatePool (EfiBootServicesData, AllocationSize);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of type EfiRuntimeServicesData.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateRuntimePool (
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of type EfiReservedMemoryType.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateReservedPool (
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
return InternalAllocatePool (EfiReservedMemoryType, AllocationSize);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of a certian pool type.
|
||||
|
||||
@param PoolType The type of memory to allocate.
|
||||
@param AllocationSize The number of bytes to allocate and zero.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocateZeroPool (
|
||||
IN EFI_MEMORY_TYPE PoolType,
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
VOID *Memory;
|
||||
Memory = InternalAllocatePool (PoolType, AllocationSize);
|
||||
if (Memory != NULL) {
|
||||
Memory = ZeroMem (Memory, AllocationSize);
|
||||
}
|
||||
return Memory;
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of type EfiBootServicesData.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate and zero.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateZeroPool (
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
return InternalAllocateZeroPool (EfiBootServicesData, AllocationSize);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of type EfiRuntimeServicesData.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate and zero.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateRuntimeZeroPool (
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of type EfiReservedMemoryType.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate and zero.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateReservedZeroPool (
|
||||
IN UINTN AllocationSize
|
||||
)
|
||||
{
|
||||
return InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of a certian memory type.
|
||||
|
||||
@param MemoryType The type of pool to allocate.
|
||||
@param AllocationSize The number of bytes to allocate and zero.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocateCopyPool (
|
||||
IN EFI_MEMORY_TYPE PoolType,
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer
|
||||
)
|
||||
{
|
||||
VOID *Memory;
|
||||
|
||||
Memory = InternalAllocatePool (PoolType, AllocationSize);
|
||||
if (Memory != NULL) {
|
||||
Memory = CopyMem (Memory, Buffer, AllocationSize);
|
||||
}
|
||||
return Memory;
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiBootServicesData.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateCopyPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer
|
||||
)
|
||||
{
|
||||
return InternalAllocateCopyPool (EfiBootServicesData, AllocationSize, Buffer);
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateRuntimeCopyPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer
|
||||
)
|
||||
{
|
||||
return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiReservedMemoryType.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateReservedCopyPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer
|
||||
)
|
||||
{
|
||||
return InternalAllocateCopyPool (EfiReservedMemoryType, AllocationSize, Buffer);
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiReservedMemoryType at a specified alignment.
|
||||
|
||||
@param Buffer Pointer to the buffer to free.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
FreePool (
|
||||
IN VOID *Buffer
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
|
||||
Status = gBS->FreePool (Buffer);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of a certain pool type at a specified alignment.
|
||||
|
||||
@param PoolType The type of pool to allocate.
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two. If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocateAlignedPool (
|
||||
IN EFI_MEMORY_TYPE PoolType,
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
VOID *RawAddress;
|
||||
UINTN AlignedAddress;
|
||||
UINTN AlignmentMask;
|
||||
UINTN OverAllocationSize;
|
||||
VOID **FreePointer;
|
||||
EFI_STATUS Status;
|
||||
|
||||
//
|
||||
// Alignment must be a power of two or zero.
|
||||
//
|
||||
ASSERT ((Alignment & (Alignment - 1)) == 0);
|
||||
|
||||
if (Alignment == 0) {
|
||||
AlignmentMask = Alignment;
|
||||
} else {
|
||||
AlignmentMask = Alignment - 1;
|
||||
}
|
||||
//
|
||||
// Calculate the extra memory size, over-allocate memory pool and get the aligned memory address.
|
||||
//
|
||||
OverAllocationSize = sizeof (RawAddress) + AlignmentMask;
|
||||
Status = gBS->AllocatePool (PoolType, AllocationSize + OverAllocationSize, &RawAddress);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return NULL;
|
||||
}
|
||||
AlignedAddress = ((UINTN) RawAddress + OverAllocationSize) & ~AlignmentMask;
|
||||
//
|
||||
// Save the original memory address just before the aligned address.
|
||||
//
|
||||
FreePointer = (VOID **)(AlignedAddress - sizeof (RawAddress));
|
||||
*FreePointer = RawAddress;
|
||||
|
||||
return (VOID *) AlignedAddress;
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of type EfiBootServicesData at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two. If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedPool (EfiBootServicesData, AllocationSize, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of type EfiRuntimeServicesData at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedRuntimePool (
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedPool (EfiRuntimeServicesData, AllocationSize, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates a buffer of type EfiReservedMemoryType at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedReservedPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedPool (EfiReservedMemoryType, AllocationSize, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of type EfiBootServicesData at a specified alignment.
|
||||
|
||||
@param PoolType The type of pool to allocate.
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocateAlignedZeroPool (
|
||||
IN EFI_MEMORY_TYPE PoolType,
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
VOID *Memory;
|
||||
Memory = InternalAllocateAlignedPool (PoolType, AllocationSize, Alignment);
|
||||
if (Memory != NULL) {
|
||||
Memory = ZeroMem (Memory, AllocationSize);
|
||||
}
|
||||
return Memory;
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of type EfiBootServicesData at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedZeroPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedZeroPool (EfiBootServicesData, AllocationSize, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of type EfiRuntimeServicesData at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedRuntimeZeroPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedZeroPool (EfiRuntimeServicesData, AllocationSize, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Allocates and zeros a buffer of type EfiReservedMemoryType at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedReservedZeroPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedZeroPool (EfiReservedMemoryType, AllocationSize, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiBootServicesData at a specified alignment.
|
||||
|
||||
@param PoolType The type of pool to allocate.
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
InternalAllocateAlignedCopyPool (
|
||||
IN EFI_MEMORY_TYPE PoolType,
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
VOID *Memory;
|
||||
|
||||
Memory = InternalAllocateAlignedPool (PoolType, AllocationSize, Alignment);
|
||||
if (Memory != NULL) {
|
||||
Memory = CopyMem (Memory, Buffer, AllocationSize);
|
||||
}
|
||||
return Memory;
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiBootServicesData at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedCopyPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedCopyPool (EfiBootServicesData, AllocationSize, Buffer, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiRuntimeServicesData at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedRuntimeCopyPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Copies a buffer to an allocated buffer of type EfiReservedMemoryType at a specified alignment.
|
||||
|
||||
@param AllocationSize The number of bytes to allocate.
|
||||
@param Buffer The buffer to copy to the allocated buffer.
|
||||
@param Alignment The requested alignment of the allocation. Must be a power of two.
|
||||
If Alignment is zero, then byte alignment is used.
|
||||
|
||||
@return A pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned.
|
||||
If there is not enough memory remaining to satisfy the request, then NULL is returned.
|
||||
|
||||
**/
|
||||
VOID *
|
||||
EFIAPI
|
||||
AllocateAlignedReservedCopyPool (
|
||||
IN UINTN AllocationSize,
|
||||
IN CONST VOID *Buffer,
|
||||
IN UINTN Alignment
|
||||
)
|
||||
{
|
||||
return InternalAllocateAlignedCopyPool (EfiReservedMemoryType, AllocationSize, Buffer, Alignment);
|
||||
}
|
||||
|
||||
/**
|
||||
Frees a buffer that was previously allocated with one of the aligned pool allocation functions
|
||||
in the Memory Allocation Library.
|
||||
|
||||
@param Buffer Pointer to the buffer to free.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
FreeAlignedPool (
|
||||
IN VOID *Buffer
|
||||
)
|
||||
{
|
||||
VOID *RawAddress;
|
||||
VOID **FreePointer;
|
||||
EFI_STATUS Status;
|
||||
|
||||
//
|
||||
// Get the pre-saved original address in the over-allocate pool.
|
||||
//
|
||||
FreePointer = (VOID **)((UINTN) Buffer - sizeof (RawAddress));
|
||||
RawAddress = *FreePointer;
|
||||
|
||||
Status = gBS->FreePool (RawAddress);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
}
|
||||
Reference in New Issue
Block a user