diff options
Diffstat (limited to 'MdePkg/Library/SmmMemoryAllocationLib/MemoryAllocationLib.c')
| -rw-r--r-- | MdePkg/Library/SmmMemoryAllocationLib/MemoryAllocationLib.c | 982 |
1 files changed, 0 insertions, 982 deletions
diff --git a/MdePkg/Library/SmmMemoryAllocationLib/MemoryAllocationLib.c b/MdePkg/Library/SmmMemoryAllocationLib/MemoryAllocationLib.c deleted file mode 100644 index 30670bf071..0000000000 --- a/MdePkg/Library/SmmMemoryAllocationLib/MemoryAllocationLib.c +++ /dev/null @@ -1,982 +0,0 @@ -/** @file
- Support routines for memory allocation routines based
- on SMM Services Table services for SMM phase drivers.
-
- The PI System Management Mode Core Interface Specification only allows the use
- of EfiRuntimeServicesCode and EfiRuntimeServicesData memory types for memory
- allocations through the SMM Services Table as the SMRAM space should be
- reserved after BDS phase. The functions in the Memory Allocation Library use
- EfiBootServicesData as the default memory allocation type. For this SMM
- specific instance of the Memory Allocation Library, EfiRuntimeServicesData
- is used as the default memory type for all allocations. In addition,
- allocation for the Reserved memory types are not supported and will always
- return NULL.
-
- Copyright (c) 2006 - 2015, Intel Corporation. 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 <PiSmm.h>
-
-#include <Protocol/SmmAccess2.h>
-#include <Library/MemoryAllocationLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/SmmServicesTableLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/DebugLib.h>
-
-EFI_SMRAM_DESCRIPTOR *mSmramRanges;
-UINTN mSmramRangeCount;
-
-/**
- The constructor function caches SMRAM ranges that are present in the system.
-
- It will ASSERT() if SMM Access2 Protocol doesn't exist.
- It will ASSERT() if SMRAM ranges can't be got.
- It will ASSERT() if Resource can't be allocated for cache SMRAM range.
- It will always return EFI_SUCCESS.
-
- @param ImageHandle The firmware allocated handle for the EFI image.
- @param SystemTable A pointer to the EFI System Table.
-
- @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
-
-**/
-EFI_STATUS
-EFIAPI
-SmmMemoryAllocationLibConstructor (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- EFI_STATUS Status;
- EFI_SMM_ACCESS2_PROTOCOL *SmmAccess;
- UINTN Size;
-
- //
- // Locate SMM Access2 Protocol
- //
- Status = gBS->LocateProtocol (
- &gEfiSmmAccess2ProtocolGuid,
- NULL,
- (VOID **)&SmmAccess
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // Get SMRAM range information
- //
- Size = 0;
- Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);
- ASSERT (Status == EFI_BUFFER_TOO_SMALL);
-
- mSmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocatePool (Size);
- ASSERT (mSmramRanges != NULL);
-
- Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmramRanges);
- ASSERT_EFI_ERROR (Status);
-
- mSmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);
-
- return EFI_SUCCESS;
-}
-
-/**
- If SMM driver exits with an error, it must call this routine
- to free the allocated resource before the exiting.
-
- @param[in] ImageHandle The firmware allocated handle for the EFI image.
- @param[in] SystemTable A pointer to the EFI System Table.
-
- @retval EFI_SUCCESS The deconstructor always returns EFI_SUCCESS.
-**/
-EFI_STATUS
-EFIAPI
-SmmMemoryAllocationLibDestructor (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- FreePool (mSmramRanges);
-
- return EFI_SUCCESS;
-}
-
-/**
- Check whether the start address of buffer is within any of the SMRAM ranges.
-
- @param[in] Buffer The pointer to the buffer to be checked.
-
- @retval TURE The buffer is in SMRAM ranges.
- @retval FALSE The buffer is out of SMRAM ranges.
-**/
-BOOLEAN
-EFIAPI
-BufferInSmram (
- IN VOID *Buffer
- )
-{
- UINTN Index;
-
- for (Index = 0; Index < mSmramRangeCount; Index ++) {
- if (((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer >= mSmramRanges[Index].CpuStart) &&
- ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer < (mSmramRanges[Index].CpuStart + mSmramRanges[Index].PhysicalSize))) {
- return TRUE;
- }
- }
-
- return FALSE;
-}
-
-/**
- Allocates one or more 4KB pages of a certain memory type.
-
- Allocates the number of 4KB pages of a certain memory type 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 MemoryType The type of memory to allocate.
- @param Pages The number of 4 KB pages to allocate.
-
- @return A pointer to the allocated buffer or NULL if allocation fails.
-
-**/
-VOID *
-InternalAllocatePages (
- IN EFI_MEMORY_TYPE MemoryType,
- IN UINTN Pages
- )
-{
- EFI_STATUS Status;
- EFI_PHYSICAL_ADDRESS Memory;
-
- if (Pages == 0) {
- return NULL;
- }
-
- Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
- if (EFI_ERROR (Status)) {
- return NULL;
- }
- return (VOID *) (UINTN) Memory;
-}
-
-/**
- Allocates one or more 4KB pages of type EfiRuntimeServicesData.
-
- Allocates the number of 4KB pages of type EfiRuntimeServicesData 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
- )
-{
- return InternalAllocatePages (EfiRuntimeServicesData, Pages);
-}
-
-/**
- Allocates one or more 4KB pages of type EfiRuntimeServicesData.
-
- Allocates the number of 4KB pages of type EfiRuntimeServicesData 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
-AllocateRuntimePages (
- IN UINTN Pages
- )
-{
- return InternalAllocatePages (EfiRuntimeServicesData, Pages);
-}
-
-/**
- Allocates one or more 4KB pages of type EfiReservedMemoryType.
-
- Allocates the number of 4KB pages of type EfiReservedMemoryType 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
-AllocateReservedPages (
- IN UINTN Pages
- )
-{
- return NULL;
-}
-
-/**
- Frees one or more 4KB pages that were previously allocated with one of the page allocation
- functions in the Memory Allocation Library.
-
- Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer.
- Buffer must have been allocated on a previous call to the page allocation services
- of the Memory Allocation Library. If it is not possible to free allocated pages,
- then this function will perform no actions.
-
- If Buffer was not allocated with a page allocation function in the Memory Allocation
- Library, then ASSERT().
- If Pages is zero, then ASSERT().
-
- @param Buffer The pointer to the buffer of pages to free.
- @param Pages The number of 4 KB pages to free.
-
-**/
-VOID
-EFIAPI
-FreePages (
- IN VOID *Buffer,
- IN UINTN Pages
- )
-{
- EFI_STATUS Status;
-
- ASSERT (Pages != 0);
- if (BufferInSmram (Buffer)) {
- //
- // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.
- // So, gSmst->SmmFreePages() service is used to free it.
- //
- Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
- } else {
- //
- // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.
- // So, gBS->FreePages() service is used to free it.
- //
- Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
- }
- ASSERT_EFI_ERROR (Status);
-}
-
-/**
- Allocates one or more 4KB pages of a certain memory type at a specified alignment.
-
- Allocates the number of 4KB pages specified by Pages of a certain memory type
- 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().
- If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, then ASSERT().
-
- @param MemoryType The type of memory to allocate.
- @param Pages The number of 4 KB pages to allocate.
- @param Alignment The requested alignment of the allocation.
- Must be a power of two.
- If Alignment is zero, then byte alignment is used.
-
- @return A pointer to the allocated buffer or NULL if allocation fails.
-
-**/
-VOID *
-InternalAllocateAlignedPages (
- IN EFI_MEMORY_TYPE MemoryType,
- IN UINTN Pages,
- IN UINTN Alignment
- )
-{
- EFI_STATUS Status;
- EFI_PHYSICAL_ADDRESS Memory;
- UINTN AlignedMemory;
- UINTN AlignmentMask;
- UINTN UnalignedPages;
- UINTN RealPages;
-
- //
- // Alignment must be a power of two or zero.
- //
- ASSERT ((Alignment & (Alignment - 1)) == 0);
-
- if (Pages == 0) {
- return NULL;
- }
- if (Alignment > EFI_PAGE_SIZE) {
- //
- // Calculate the total number of pages since alignment is larger than page size.
- //
- AlignmentMask = Alignment - 1;
- RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);
- //
- // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.
- //
- ASSERT (RealPages > Pages);
-
- Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);
- if (EFI_ERROR (Status)) {
- return NULL;
- }
- AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;
- UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);
- if (UnalignedPages > 0) {
- //
- // Free first unaligned page(s).
- //
- Status = gSmst->SmmFreePages (Memory, UnalignedPages);
- ASSERT_EFI_ERROR (Status);
- }
- Memory = (EFI_PHYSICAL_ADDRESS) (AlignedMemory + EFI_PAGES_TO_SIZE (Pages));
- UnalignedPages = RealPages - Pages - UnalignedPages;
- if (UnalignedPages > 0) {
- //
- // Free last unaligned page(s).
- //
- Status = gSmst->SmmFreePages (Memory, UnalignedPages);
- ASSERT_EFI_ERROR (Status);
- }
- } else {
- //
- // Do not over-allocate pages in this case.
- //
- Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
- if (EFI_ERROR (Status)) {
- return NULL;
- }
- AlignedMemory = (UINTN) Memory;
- }
- return (VOID *) AlignedMemory;
-}
-
-/**
- Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.
-
- Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData
- 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().
- If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, 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
- )
-{
- return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);
-}
-
-/**
- Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.
-
- Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData
- 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().
- If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, 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
-AllocateAlignedRuntimePages (
- IN UINTN Pages,
- IN UINTN Alignment
- )
-{
- return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);
-}
-
-/**
- Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.
-
- Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType
- 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().
- If Pages plus EFI_SIZE_TO_PAGES (Alignment) overflows, 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
-AllocateAlignedReservedPages (
- IN UINTN Pages,
- IN UINTN Alignment
- )
-{
- return NULL;
-}
-
-/**
- Frees one or more 4KB pages that were previously allocated with one of the aligned page
- allocation functions in the Memory Allocation Library.
-
- Frees the number of 4KB pages specified by Pages from the buffer specified by
- Buffer. Buffer must have been allocated on a previous call to the aligned page
- allocation services of the Memory Allocation Library. If it is not possible to
- free allocated pages, then this function will perform no actions.
-
- If Buffer was not allocated with an aligned page allocation function in the
- Memory Allocation Library, then ASSERT().
- If Pages is zero, then ASSERT().
-
- @param Buffer The pointer to the buffer of pages to free.
- @param Pages The number of 4 KB pages to free.
-
-**/
-VOID
-EFIAPI
-FreeAlignedPages (
- IN VOID *Buffer,
- IN UINTN Pages
- )
-{
- EFI_STATUS Status;
-
- ASSERT (Pages != 0);
- if (BufferInSmram (Buffer)) {
- //
- // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePages() service.
- // So, gSmst->SmmFreePages() service is used to free it.
- //
- Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
- } else {
- //
- // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePages() service.
- // So, gBS->FreePages() service is used to free it.
- //
- Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
- }
- ASSERT_EFI_ERROR (Status);
-}
-
-/**
- Allocates a buffer of a certain pool type.
-
- Allocates the number bytes specified by AllocationSize of a certain pool type
- 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 MemoryType The type of memory to allocate.
- @param AllocationSize The number of bytes to allocate.
-
- @return A pointer to the allocated buffer or NULL if allocation fails.
-
-**/
-VOID *
-InternalAllocatePool (
- IN EFI_MEMORY_TYPE MemoryType,
- IN UINTN AllocationSize
- )
-{
- EFI_STATUS Status;
- VOID *Memory;
-
- Status = gSmst->SmmAllocatePool (MemoryType, AllocationSize, &Memory);
- if (EFI_ERROR (Status)) {
- Memory = NULL;
- }
- return Memory;
-}
-
-/**
- Allocates a buffer of type EfiRuntimeServicesData.
-
- Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData
- 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
- )
-{
- return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);
-}
-
-/**
- Allocates a buffer of type EfiRuntimeServicesData.
-
- Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData
- 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
-AllocateRuntimePool (
- IN UINTN AllocationSize
- )
-{
- return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);
-}
-
-/**
- Allocates a buffer of type EfiReservedMemoryType.
-
- Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType
- 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
-AllocateReservedPool (
- IN UINTN AllocationSize
- )
-{
- return NULL;
-}
-
-/**
- Allocates and zeros a buffer of a certain pool type.
-
- Allocates the number bytes specified by AllocationSize of a certain pool type,
- clears the buffer with zeros, 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 PoolType The type of memory to allocate.
- @param AllocationSize The number of bytes to allocate and zero.
-
- @return A pointer to the allocated buffer or NULL if allocation fails.
-
-**/
-VOID *
-InternalAllocateZeroPool (
- IN EFI_MEMORY_TYPE PoolType,
- IN UINTN AllocationSize
- )
-{
- VOID *Memory;
-
- Memory = InternalAllocatePool (PoolType, AllocationSize);
- if (Memory != NULL) {
- Memory = ZeroMem (Memory, AllocationSize);
- }
- return Memory;
-}
-
-/**
- Allocates and zeros a buffer of type EfiRuntimeServicesData.
-
- 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 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 and zero.
-
- @return A pointer to the allocated buffer or NULL if allocation fails.
-
-**/
-VOID *
-EFIAPI
-AllocateZeroPool (
- IN UINTN AllocationSize
- )
-{
- return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);
-}
-
-/**
- Allocates and zeros a buffer of type EfiRuntimeServicesData.
-
- 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 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 and zero.
-
- @return A pointer to the allocated buffer or NULL if allocation fails.
-
-**/
-VOID *
-EFIAPI
-AllocateRuntimeZeroPool (
- IN UINTN AllocationSize
- )
-{
- return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);
-}
-
-/**
- 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 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 and zero.
-
- @return A pointer to the allocated buffer or NULL if allocation fails.
-
-**/
-VOID *
-EFIAPI
-AllocateReservedZeroPool (
- IN UINTN AllocationSize
- )
-{
- return NULL;
-}
-
-/**
- Copies a buffer to an allocated buffer of a certain pool type.
-
- 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 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
-AllocateCopyPool (
- IN UINTN AllocationSize,
- IN CONST VOID *Buffer
- )
-{
- return InternalAllocateCopyPool (EfiRuntimeServicesData, 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 NULL;
-}
-
-/**
- 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 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
-ReallocatePool (
- IN UINTN OldSize,
- IN UINTN NewSize,
- IN VOID *OldBuffer OPTIONAL
- )
-{
- return InternalReallocatePool (EfiRuntimeServicesData, 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 NULL;
-}
-
-/**
- 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 The pointer to the buffer to free.
-
-**/
-VOID
-EFIAPI
-FreePool (
- IN VOID *Buffer
- )
-{
- EFI_STATUS Status;
-
- if (BufferInSmram (Buffer)) {
- //
- // When Buffer is in SMRAM range, it should be allocated by gSmst->SmmAllocatePool() service.
- // So, gSmst->SmmFreePool() service is used to free it.
- //
- Status = gSmst->SmmFreePool (Buffer);
- } else {
- //
- // When Buffer is out of SMRAM range, it should be allocated by gBS->AllocatePool() service.
- // So, gBS->FreePool() service is used to free it.
- //
- Status = gBS->FreePool (Buffer);
- }
- ASSERT_EFI_ERROR (Status);
-}
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