diff options
Diffstat (limited to 'EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c')
-rw-r--r-- | EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c | 384 |
1 files changed, 192 insertions, 192 deletions
diff --git a/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c b/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c index 7cfc28e1e7..85a32b7362 100644 --- a/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c +++ b/EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c @@ -1,192 +1,192 @@ -/** @file - Implementation of the 6 PEI Ffs (FV) APIs in library form. - - Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> - - This program and the accompanying materials - are licensed and made available under the terms and conditions of the BSD License - which accompanies this distribution. The full text of the license may be found at - http://opensource.org/licenses/bsd-license.php - - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. - -**/ - -#include <PiPei.h> - -#include <Library/BaseLib.h> -#include <Library/PrePiLib.h> -#include <Library/DebugLib.h> - - - -/** - Allocates one or more 4KB pages of type EfiBootServicesData. - - Allocates the number of 4KB pages of MemoryType and returns a pointer to the - allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL - is returned. If there is not enough memory remaining to satisfy the request, then NULL is - returned. - - @param Pages The number of 4 KB pages to allocate. - - @return A pointer to the allocated buffer or NULL if allocation fails. - -**/ -VOID * -EFIAPI -AllocatePages ( - IN UINTN Pages - ) -{ - EFI_PEI_HOB_POINTERS Hob; - EFI_PHYSICAL_ADDRESS Offset; - - Hob.Raw = GetHobList (); - - // Check to see if on 4k boundary - Offset = Hob.HandoffInformationTable->EfiFreeMemoryTop & 0xFFF; - if (Offset != 0) { - // If not aligned, make the allocation aligned. - Hob.HandoffInformationTable->EfiFreeMemoryTop -= Offset; - } - - // - // Verify that there is sufficient memory to satisfy the allocation - // - if (Hob.HandoffInformationTable->EfiFreeMemoryTop - ((Pages * EFI_PAGE_SIZE) + sizeof (EFI_HOB_MEMORY_ALLOCATION)) < Hob.HandoffInformationTable->EfiFreeMemoryBottom) { - return 0; - } else { - // - // Update the PHIT to reflect the memory usage - // - Hob.HandoffInformationTable->EfiFreeMemoryTop -= Pages * EFI_PAGE_SIZE; - - // This routine used to create a memory allocation HOB a la PEI, but that's not - // necessary for us. - - // - // Create a memory allocation HOB. - // - BuildMemoryAllocationHob ( - Hob.HandoffInformationTable->EfiFreeMemoryTop, - Pages * EFI_PAGE_SIZE, - EfiBootServicesData - ); - return (VOID *)(UINTN)Hob.HandoffInformationTable->EfiFreeMemoryTop; - } -} - - -/** - Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment. - - Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an - alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is - returned. If there is not enough memory at the specified alignment remaining to satisfy the - request, then NULL is returned. - If Alignment is not a power of two and Alignment is not zero, then ASSERT(). - - @param Pages The number of 4 KB pages to allocate. - @param Alignment The requested alignment of the allocation. Must be a power of two. - If Alignment is zero, then byte alignment is used. - - @return A pointer to the allocated buffer or NULL if allocation fails. - -**/ -VOID * -EFIAPI -AllocateAlignedPages ( - IN UINTN Pages, - IN UINTN Alignment - ) -{ - VOID *Memory; - UINTN AlignmentMask; - - // - // Alignment must be a power of two or zero. - // - ASSERT ((Alignment & (Alignment - 1)) == 0); - - if (Pages == 0) { - return NULL; - } - // - // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow. - // - ASSERT (Pages <= (MAX_ADDRESS - EFI_SIZE_TO_PAGES (Alignment))); - // - // We would rather waste some memory to save PEI code size. - // - Memory = (VOID *)(UINTN)AllocatePages (Pages + EFI_SIZE_TO_PAGES (Alignment)); - if (Alignment == 0) { - AlignmentMask = Alignment; - } else { - AlignmentMask = Alignment - 1; - } - return (VOID *) (UINTN) (((UINTN) Memory + AlignmentMask) & ~AlignmentMask); -} - - - - -/** - Allocates a buffer of type EfiBootServicesData. - - Allocates the number bytes specified by AllocationSize of type EfiBootServicesData 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. - - @param AllocationSize The number of bytes to allocate. - - @return A pointer to the allocated buffer or NULL if allocation fails. - -**/ -VOID * -EFIAPI -AllocatePool ( - IN UINTN AllocationSize - ) -{ - EFI_HOB_MEMORY_POOL *Hob; - - Hob = GetHobList (); - - - // - // Verify that there is sufficient memory to satisfy the allocation - // - if (AllocationSize > 0x10000) { - // Please call AllcoatePages for big allocations - return 0; - } else { - - Hob = (EFI_HOB_MEMORY_POOL *)CreateHob (EFI_HOB_TYPE_MEMORY_POOL, (UINT16)(sizeof (EFI_HOB_TYPE_MEMORY_POOL) + AllocationSize)); - return (VOID *)(Hob + 1); - } -} - -/** - 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 - ) -{ - // Not implemented yet -} +/** @file
+ Implementation of the 6 PEI Ffs (FV) APIs in library form.
+
+ Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <PiPei.h>
+
+#include <Library/BaseLib.h>
+#include <Library/PrePiLib.h>
+#include <Library/DebugLib.h>
+
+
+
+/**
+ Allocates one or more 4KB pages of type EfiBootServicesData.
+
+ Allocates the number of 4KB pages of MemoryType and returns a pointer to the
+ allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL
+ is returned. If there is not enough memory remaining to satisfy the request, then NULL is
+ returned.
+
+ @param Pages The number of 4 KB pages to allocate.
+
+ @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID *
+EFIAPI
+AllocatePages (
+ IN UINTN Pages
+ )
+{
+ EFI_PEI_HOB_POINTERS Hob;
+ EFI_PHYSICAL_ADDRESS Offset;
+
+ Hob.Raw = GetHobList ();
+
+ // Check to see if on 4k boundary
+ Offset = Hob.HandoffInformationTable->EfiFreeMemoryTop & 0xFFF;
+ if (Offset != 0) {
+ // If not aligned, make the allocation aligned.
+ Hob.HandoffInformationTable->EfiFreeMemoryTop -= Offset;
+ }
+
+ //
+ // Verify that there is sufficient memory to satisfy the allocation
+ //
+ if (Hob.HandoffInformationTable->EfiFreeMemoryTop - ((Pages * EFI_PAGE_SIZE) + sizeof (EFI_HOB_MEMORY_ALLOCATION)) < Hob.HandoffInformationTable->EfiFreeMemoryBottom) {
+ return 0;
+ } else {
+ //
+ // Update the PHIT to reflect the memory usage
+ //
+ Hob.HandoffInformationTable->EfiFreeMemoryTop -= Pages * EFI_PAGE_SIZE;
+
+ // This routine used to create a memory allocation HOB a la PEI, but that's not
+ // necessary for us.
+
+ //
+ // Create a memory allocation HOB.
+ //
+ BuildMemoryAllocationHob (
+ Hob.HandoffInformationTable->EfiFreeMemoryTop,
+ Pages * EFI_PAGE_SIZE,
+ EfiBootServicesData
+ );
+ return (VOID *)(UINTN)Hob.HandoffInformationTable->EfiFreeMemoryTop;
+ }
+}
+
+
+/**
+ Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.
+
+ Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an
+ alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is
+ returned. If there is not enough memory at the specified alignment remaining to satisfy the
+ request, then NULL is returned.
+ If Alignment is not a power of two and Alignment is not zero, then ASSERT().
+
+ @param Pages The number of 4 KB pages to allocate.
+ @param Alignment The requested alignment of the allocation. Must be a power of two.
+ If Alignment is zero, then byte alignment is used.
+
+ @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID *
+EFIAPI
+AllocateAlignedPages (
+ IN UINTN Pages,
+ IN UINTN Alignment
+ )
+{
+ VOID *Memory;
+ UINTN AlignmentMask;
+
+ //
+ // Alignment must be a power of two or zero.
+ //
+ ASSERT ((Alignment & (Alignment - 1)) == 0);
+
+ if (Pages == 0) {
+ return NULL;
+ }
+ //
+ // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.
+ //
+ ASSERT (Pages <= (MAX_ADDRESS - EFI_SIZE_TO_PAGES (Alignment)));
+ //
+ // We would rather waste some memory to save PEI code size.
+ //
+ Memory = (VOID *)(UINTN)AllocatePages (Pages + EFI_SIZE_TO_PAGES (Alignment));
+ if (Alignment == 0) {
+ AlignmentMask = Alignment;
+ } else {
+ AlignmentMask = Alignment - 1;
+ }
+ return (VOID *) (UINTN) (((UINTN) Memory + AlignmentMask) & ~AlignmentMask);
+}
+
+
+
+
+/**
+ Allocates a buffer of type EfiBootServicesData.
+
+ Allocates the number bytes specified by AllocationSize of type EfiBootServicesData 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.
+
+ @param AllocationSize The number of bytes to allocate.
+
+ @return A pointer to the allocated buffer or NULL if allocation fails.
+
+**/
+VOID *
+EFIAPI
+AllocatePool (
+ IN UINTN AllocationSize
+ )
+{
+ EFI_HOB_MEMORY_POOL *Hob;
+
+ Hob = GetHobList ();
+
+
+ //
+ // Verify that there is sufficient memory to satisfy the allocation
+ //
+ if (AllocationSize > 0x10000) {
+ // Please call AllcoatePages for big allocations
+ return 0;
+ } else {
+
+ Hob = (EFI_HOB_MEMORY_POOL *)CreateHob (EFI_HOB_TYPE_MEMORY_POOL, (UINT16)(sizeof (EFI_HOB_TYPE_MEMORY_POOL) + AllocationSize));
+ return (VOID *)(Hob + 1);
+ }
+}
+
+/**
+ 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
+ )
+{
+ // Not implemented yet
+}
|