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0ac727136e
The implementation borrows the DxeCore Memory Allocation services as the primitive for memory allocation instead of using UEFI boot servces in an indirect way. It is assumed that this library instance must be linked with DxeCore in this package. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5737 6f19259b-4bc3-4df7-8a09-765794883524
670 lines
22 KiB
C
670 lines
22 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 - 2008, Intel Corporation<BR>
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All rights reserved. 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.
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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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@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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// Caculate 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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@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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@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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@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.
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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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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 EfieservedMemoryType.
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Allocates the number bytes specified by AllocationSize of type EfieservedMemoryType 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 certian pool type.
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Allocates the number bytes specified by AllocationSize of a certian 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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Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the
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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
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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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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
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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
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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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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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/**
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Allocates and zeros a buffer of type EfiReservedMemoryType.
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Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, clears the
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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
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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 certian pool type.
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Allocates the number bytes specified by AllocationSize of a certian pool type, copies
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AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the
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allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there
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is not enough memory remaining to satisfy the request, then NULL is returned.
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If Buffer is NULL, then ASSERT().
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If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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@param PoolType The type of pool to allocate.
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@param AllocationSize The number of bytes to allocate and zero.
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@param Buffer The buffer to copy to the allocated buffer.
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|
|
|
@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);
|
|
}
|
|
|
|
/**
|
|
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 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);
|
|
}
|
|
|