e50a226b2f
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Shumin Qiu <shumin.qiu@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17045 6f19259b-4bc3-4df7-8a09-765794883524
824 lines
28 KiB
C
824 lines
28 KiB
C
/** @file
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Support routines for memory allocation routines based
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on boot services for Dxe phase drivers.
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Copyright (c) 2006 - 2015, 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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#include <PiDxe.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include "DxeCoreMemoryAllocationServices.h"
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/**
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Allocates one or more 4KB pages of a certain memory type.
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Allocates the number of 4KB pages of a certain memory type and returns a pointer to the allocated
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buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL is returned.
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If there is not enough memory remaining to satisfy the request, then NULL is returned.
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@param MemoryType The type of memory to allocate.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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InternalAllocatePages (
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IN EFI_MEMORY_TYPE MemoryType,
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IN UINTN Pages
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)
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{
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS Memory;
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if (Pages == 0) {
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return NULL;
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}
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Status = CoreAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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return (VOID *) (UINTN) Memory;
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}
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/**
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Allocates one or more 4KB pages of type EfiBootServicesData.
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Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer to the
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allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL
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is returned. If there is not enough memory remaining to satisfy the request, then NULL is
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returned.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocatePages (
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IN UINTN Pages
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)
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{
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return InternalAllocatePages (EfiBootServicesData, Pages);
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}
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/**
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Allocates one or more 4KB pages of type EfiRuntimeServicesData.
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Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the
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allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL
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is returned. If there is not enough memory remaining to satisfy the request, then NULL is
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returned.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateRuntimePages (
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IN UINTN Pages
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)
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{
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return InternalAllocatePages (EfiRuntimeServicesData, Pages);
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}
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/**
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Allocates one or more 4KB pages of type EfiReservedMemoryType.
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Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a pointer to the
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allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL
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is returned. If there is not enough memory remaining to satisfy the request, then NULL is
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returned.
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@param Pages The number of 4 KB pages to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateReservedPages (
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IN UINTN Pages
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)
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{
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return InternalAllocatePages (EfiReservedMemoryType, Pages);
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}
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/**
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Frees one or more 4KB pages that were previously allocated with one of the page allocation
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functions in the Memory Allocation Library.
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Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer
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must have been allocated on a previous call to the page allocation services of the Memory
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Allocation Library. If it is not possible to free allocated pages, then this function will
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perform no actions.
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If Buffer was not allocated with a page allocation function in the Memory Allocation Library,
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then ASSERT().
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If Pages is zero, then ASSERT().
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@param Buffer Pointer to the buffer of pages to free.
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@param Pages The number of 4 KB pages to free.
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**/
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VOID
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EFIAPI
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FreePages (
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IN VOID *Buffer,
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IN UINTN Pages
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)
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{
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EFI_STATUS Status;
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ASSERT (Pages != 0);
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Status = CoreFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Allocates one or more 4KB pages of a certain memory type at a specified alignment.
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Allocates the number of 4KB pages specified by Pages of a certain memory type with an alignment
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specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is returned.
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If there is not enough memory at the specified alignment remaining to satisfy the request, then
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NULL is returned.
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If Alignment is not a power of two and Alignment is not zero, then ASSERT().
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If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
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@param MemoryType The type of memory to allocate.
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@param Pages The number of 4 KB pages to allocate.
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@param Alignment The requested alignment of the allocation. Must be a power of two.
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If Alignment is zero, then byte alignment is used.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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InternalAllocateAlignedPages (
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IN EFI_MEMORY_TYPE MemoryType,
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IN UINTN Pages,
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IN UINTN Alignment
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)
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{
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS Memory;
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UINTN AlignedMemory;
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UINTN AlignmentMask;
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UINTN UnalignedPages;
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UINTN RealPages;
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//
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// Alignment must be a power of two or zero.
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//
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ASSERT ((Alignment & (Alignment - 1)) == 0);
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if (Pages == 0) {
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return NULL;
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}
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if (Alignment > EFI_PAGE_SIZE) {
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//
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// Calculate the total number of pages since alignment is larger than page size.
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//
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AlignmentMask = Alignment - 1;
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RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);
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//
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// Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.
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//
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ASSERT (RealPages > Pages);
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Status = CoreAllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;
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UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);
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if (UnalignedPages > 0) {
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//
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// Free first unaligned page(s).
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//
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Status = CoreFreePages (Memory, UnalignedPages);
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ASSERT_EFI_ERROR (Status);
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}
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Memory = (EFI_PHYSICAL_ADDRESS) (AlignedMemory + EFI_PAGES_TO_SIZE (Pages));
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UnalignedPages = RealPages - Pages - UnalignedPages;
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if (UnalignedPages > 0) {
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//
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// Free last unaligned page(s).
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//
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Status = CoreFreePages (Memory, UnalignedPages);
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ASSERT_EFI_ERROR (Status);
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}
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} else {
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//
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// Do not over-allocate pages in this case.
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//
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Status = CoreAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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AlignedMemory = (UINTN) Memory;
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}
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return (VOID *) AlignedMemory;
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}
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/**
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Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.
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Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an
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alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is
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returned. If there is not enough memory at the specified alignment remaining to satisfy the
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request, then NULL is returned.
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If Alignment is not a power of two and Alignment is not zero, then ASSERT().
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If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
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@param Pages The number of 4 KB pages to allocate.
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@param Alignment The requested alignment of the allocation. Must be a power of two.
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If Alignment is zero, then byte alignment is used.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateAlignedPages (
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IN UINTN Pages,
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IN UINTN Alignment
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)
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{
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return InternalAllocateAlignedPages (EfiBootServicesData, Pages, Alignment);
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}
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/**
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Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.
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Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData with an
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alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is
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returned. If there is not enough memory at the specified alignment remaining to satisfy the
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request, then NULL is returned.
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If Alignment is not a power of two and Alignment is not zero, then ASSERT().
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If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
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@param Pages The number of 4 KB pages to allocate.
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@param Alignment The requested alignment of the allocation. Must be a power of two.
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If Alignment is zero, then byte alignment is used.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateAlignedRuntimePages (
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IN UINTN Pages,
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IN UINTN Alignment
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)
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{
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return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);
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}
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/**
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Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.
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Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType with an
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alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is
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returned. If there is not enough memory at the specified alignment remaining to satisfy the
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request, then NULL is returned.
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If Alignment is not a power of two and Alignment is not zero, then ASSERT().
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If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
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@param Pages The number of 4 KB pages to allocate.
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@param Alignment The requested alignment of the allocation. Must be a power of two.
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If Alignment is zero, then byte alignment is used.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateAlignedReservedPages (
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IN UINTN Pages,
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IN UINTN Alignment
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)
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{
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return InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);
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}
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/**
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Frees one or more 4KB pages that were previously allocated with one of the aligned page
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allocation functions in the Memory Allocation Library.
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Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer
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must have been allocated on a previous call to the aligned page allocation services of the Memory
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Allocation Library. If it is not possible to free allocated pages, then this function will
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perform no actions.
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If Buffer was not allocated with an aligned page allocation function in the Memory Allocation
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Library, then ASSERT().
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If Pages is zero, then ASSERT().
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@param Buffer Pointer to the buffer of pages to free.
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@param Pages The number of 4 KB pages to free.
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**/
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VOID
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EFIAPI
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FreeAlignedPages (
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IN VOID *Buffer,
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IN UINTN Pages
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)
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{
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EFI_STATUS Status;
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ASSERT (Pages != 0);
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Status = CoreFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Allocates a buffer of a certain pool type.
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Allocates the number bytes specified by AllocationSize of a certain pool type and returns a
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pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is
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returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.
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@param MemoryType The type of memory to allocate.
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@param AllocationSize The number of bytes to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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InternalAllocatePool (
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IN EFI_MEMORY_TYPE MemoryType,
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IN UINTN AllocationSize
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)
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{
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EFI_STATUS Status;
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VOID *Memory;
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Memory = NULL;
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Status = CoreAllocatePool (MemoryType, AllocationSize, &Memory);
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if (EFI_ERROR (Status)) {
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Memory = NULL;
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}
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return Memory;
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}
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/**
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Allocates a buffer of type EfiBootServicesData.
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Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a
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pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is
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returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.
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@param AllocationSize The number of bytes to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocatePool (
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IN UINTN AllocationSize
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)
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{
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return InternalAllocatePool (EfiBootServicesData, AllocationSize);
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}
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/**
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Allocates a buffer of type EfiRuntimeServicesData.
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Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData and returns
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a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is
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returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.
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@param AllocationSize The number of bytes to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateRuntimePool (
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IN UINTN AllocationSize
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)
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{
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return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);
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}
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/**
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Allocates a buffer of type EfiReservedMemoryType.
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Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType and returns
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a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is
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returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.
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@param AllocationSize The number of bytes to allocate.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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EFIAPI
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AllocateReservedPool (
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IN UINTN AllocationSize
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)
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{
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return InternalAllocatePool (EfiReservedMemoryType, AllocationSize);
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}
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/**
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Allocates and zeros a buffer of a certain pool type.
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Allocates the number bytes specified by AllocationSize of a certain pool type, clears the buffer
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with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a valid
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buffer of 0 size is returned. If there is not enough memory remaining to satisfy the request,
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then NULL is returned.
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@param PoolType The type of memory to allocate.
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@param AllocationSize The number of bytes to allocate and zero.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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VOID *
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InternalAllocateZeroPool (
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IN EFI_MEMORY_TYPE PoolType,
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IN UINTN AllocationSize
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)
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{
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VOID *Memory;
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Memory = InternalAllocatePool (PoolType, AllocationSize);
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if (Memory != NULL) {
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Memory = ZeroMem (Memory, AllocationSize);
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}
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return Memory;
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}
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/**
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Allocates and zeros a buffer of type EfiBootServicesData.
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|
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|
Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the
|
|
buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a
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|
valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the
|
|
request, then NULL is returned.
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|
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@param AllocationSize The number of bytes to allocate and zero.
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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|
VOID *
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EFIAPI
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AllocateZeroPool (
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IN UINTN AllocationSize
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)
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|
{
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return InternalAllocateZeroPool (EfiBootServicesData, AllocationSize);
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}
|
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|
|
/**
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|
Allocates and zeros a buffer of type EfiRuntimeServicesData.
|
|
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|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, clears the
|
|
buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a
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|
valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the
|
|
request, then NULL is returned.
|
|
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@param AllocationSize The number of bytes to allocate and zero.
|
|
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
|
|
VOID *
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EFIAPI
|
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AllocateRuntimeZeroPool (
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IN UINTN AllocationSize
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)
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{
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return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);
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}
|
|
|
|
/**
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|
Allocates and zeros a buffer of type EfiReservedMemoryType.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, clears the
|
|
buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a
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valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the
|
|
request, then NULL is returned.
|
|
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@param AllocationSize The number of bytes to allocate and zero.
|
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@return A pointer to the allocated buffer or NULL if allocation fails.
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**/
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|
VOID *
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EFIAPI
|
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AllocateReservedZeroPool (
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IN UINTN AllocationSize
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)
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{
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return InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);
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}
|
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|
|
/**
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|
Copies a buffer to an allocated buffer of a certain pool type.
|
|
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|
Allocates the number bytes specified by AllocationSize of a certain pool type, copies
|
|
AllocationSize bytes from Buffer to the newly allocated buffer, and returns 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.
|
|
If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param PoolType 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 or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
InternalAllocateCopyPool (
|
|
IN EFI_MEMORY_TYPE PoolType,
|
|
IN UINTN AllocationSize,
|
|
IN CONST VOID *Buffer
|
|
)
|
|
{
|
|
VOID *Memory;
|
|
|
|
ASSERT (Buffer != NULL);
|
|
ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));
|
|
|
|
Memory = InternalAllocatePool (PoolType, AllocationSize);
|
|
if (Memory != NULL) {
|
|
Memory = CopyMem (Memory, Buffer, AllocationSize);
|
|
}
|
|
return Memory;
|
|
}
|
|
|
|
/**
|
|
Copies a buffer to an allocated buffer of type EfiBootServicesData.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, copies
|
|
AllocationSize bytes from Buffer to the newly allocated buffer, and returns 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.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@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 or NULL if allocation fails.
|
|
|
|
**/
|
|
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.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, copies
|
|
AllocationSize bytes from Buffer to the newly allocated buffer, and returns 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.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@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 or NULL if allocation fails.
|
|
|
|
**/
|
|
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.
|
|
|
|
Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, copies
|
|
AllocationSize bytes from Buffer to the newly allocated buffer, and returns 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.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@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 or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
AllocateReservedCopyPool (
|
|
IN UINTN AllocationSize,
|
|
IN CONST VOID *Buffer
|
|
)
|
|
{
|
|
return InternalAllocateCopyPool (EfiReservedMemoryType, AllocationSize, Buffer);
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of a specified memory type.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of the type
|
|
specified by PoolType. If OldBuffer is not NULL, then the smaller of OldSize and
|
|
NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize 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.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize and OldSize
|
|
is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param PoolType The type of pool to allocate.
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an optional
|
|
parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
InternalReallocatePool (
|
|
IN EFI_MEMORY_TYPE PoolType,
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
VOID *NewBuffer;
|
|
|
|
NewBuffer = InternalAllocateZeroPool (PoolType, NewSize);
|
|
if (NewBuffer != NULL && OldBuffer != NULL) {
|
|
CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));
|
|
FreePool (OldBuffer);
|
|
}
|
|
return NewBuffer;
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of type EfiBootServicesData.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of type
|
|
EfiBootServicesData. If OldBuffer is not NULL, then the smaller of OldSize and
|
|
NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize 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.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize and OldSize
|
|
is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an optional
|
|
parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ReallocatePool (
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
return InternalReallocatePool (EfiBootServicesData, OldSize, NewSize, OldBuffer);
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of type EfiRuntimeServicesData.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of type
|
|
EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize and
|
|
NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize 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.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize and OldSize
|
|
is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an optional
|
|
parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ReallocateRuntimePool (
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);
|
|
}
|
|
|
|
/**
|
|
Reallocates a buffer of type EfiReservedMemoryType.
|
|
|
|
Allocates and zeros the number bytes specified by NewSize from memory of type
|
|
EfiReservedMemoryType. If OldBuffer is not NULL, then the smaller of OldSize and
|
|
NewSize bytes are copied from OldBuffer to the newly allocated buffer, and
|
|
OldBuffer is freed. A pointer to the newly allocated buffer is returned.
|
|
If NewSize 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.
|
|
|
|
If the allocation of the new buffer is successful and the smaller of NewSize and OldSize
|
|
is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().
|
|
|
|
@param OldSize The size, in bytes, of OldBuffer.
|
|
@param NewSize The size, in bytes, of the buffer to reallocate.
|
|
@param OldBuffer The buffer to copy to the allocated buffer. This is an optional
|
|
parameter that may be NULL.
|
|
|
|
@return A pointer to the allocated buffer or NULL if allocation fails.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ReallocateReservedPool (
|
|
IN UINTN OldSize,
|
|
IN UINTN NewSize,
|
|
IN VOID *OldBuffer OPTIONAL
|
|
)
|
|
{
|
|
return InternalReallocatePool (EfiReservedMemoryType, OldSize, NewSize, OldBuffer);
|
|
}
|
|
|
|
/**
|
|
Frees a buffer that was previously allocated with one of the pool allocation functions in the
|
|
Memory Allocation Library.
|
|
|
|
Frees the buffer specified by Buffer. Buffer must have been allocated on a previous call to the
|
|
pool allocation services of the Memory Allocation Library. If it is not possible to free pool
|
|
resources, then this function will perform no actions.
|
|
|
|
If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,
|
|
then ASSERT().
|
|
|
|
@param Buffer Pointer to the buffer to free.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
FreePool (
|
|
IN VOID *Buffer
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
Status = CoreFreePool (Buffer);
|
|
ASSERT_EFI_ERROR (Status);
|
|
}
|
|
|