--- /dev/null
+/** @file\r
+ Support routines for memory allocation routines based \r
+ on SMM Services Table services for SMM phase drivers.\r
+ \r
+ The PI System Management Mode Core Interface Specification only allows the use\r
+ of EfiRuntimeServicesCode and EfiRuntimeServicesData memory types for memory \r
+ allocations through the SMM Services Table. The functions in the Memory \r
+ Allocation Library use EfiBootServicesData as the default memory allocation\r
+ type. For this SMM specific instance of the Memory Allocation Library, \r
+ EfiRuntimeServicesData is used as the default memory type for all allocations.\r
+ In addition, allocation for the Reserved memory types are not supported and \r
+ will always return NULL.\r
+\r
+ Copyright (c) 2006 - 2010, Intel Corporation<BR>\r
+ All rights reserved. This program and the accompanying materials \r
+ are licensed and made available under the terms and conditions of the BSD License \r
+ which accompanies this distribution. The full text of the license may be found at \r
+ http://opensource.org/licenses/bsd-license.php \r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
+\r
+**/\r
+\r
+#include <PiSmm.h>\r
+\r
+#include <Library/MemoryAllocationLib.h>\r
+#include <Library/SmmServicesTableLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
+#include <Library/DebugLib.h>\r
+\r
+/**\r
+ Allocates one or more 4KB pages of a certain memory type.\r
+\r
+ Allocates the number of 4KB pages of a certain memory type and returns a pointer to the allocated\r
+ buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL is returned.\r
+ If there is not enough memory remaining to satisfy the request, then NULL is returned.\r
+\r
+ @param MemoryType The type of memory to allocate.\r
+ @param Pages The number of 4 KB pages to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+InternalAllocatePages (\r
+ IN EFI_MEMORY_TYPE MemoryType, \r
+ IN UINTN Pages\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_PHYSICAL_ADDRESS Memory; \r
+\r
+ if (Pages == 0) {\r
+ return NULL;\r
+ }\r
+\r
+ Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r
+ if (EFI_ERROR (Status)) {\r
+ return NULL;\r
+ }\r
+ return (VOID *) (UINTN) Memory;\r
+}\r
+\r
+/**\r
+ Allocates one or more 4KB pages of type EfiBootServicesData.\r
+\r
+ Allocates the number of 4KB pages of type EfiBootServicesData and returns a pointer to the\r
+ allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r
+ is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r
+ returned.\r
+\r
+ @param Pages The number of 4 KB pages to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocatePages (\r
+ IN UINTN Pages\r
+ )\r
+{\r
+ return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r
+}\r
+\r
+/**\r
+ Allocates one or more 4KB pages of type EfiRuntimeServicesData.\r
+\r
+ Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the\r
+ allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r
+ is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r
+ returned.\r
+\r
+ @param Pages The number of 4 KB pages to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateRuntimePages (\r
+ IN UINTN Pages\r
+ )\r
+{\r
+ return InternalAllocatePages (EfiRuntimeServicesData, Pages);\r
+}\r
+\r
+/**\r
+ Allocates one or more 4KB pages of type EfiReservedMemoryType.\r
+\r
+ Allocates the number of 4KB pages of type EfiReservedMemoryType and returns a pointer to the\r
+ allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL\r
+ is returned. If there is not enough memory remaining to satisfy the request, then NULL is\r
+ returned.\r
+\r
+ @param Pages The number of 4 KB pages to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateReservedPages (\r
+ IN UINTN Pages\r
+ )\r
+{\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Frees one or more 4KB pages that were previously allocated with one of the page allocation\r
+ functions in the Memory Allocation Library.\r
+\r
+ Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r
+ must have been allocated on a previous call to the page allocation services of the Memory\r
+ Allocation Library. If it is not possible to free allocated pages, then this function will\r
+ perform no actions.\r
+ \r
+ If Buffer was not allocated with a page allocation function in the Memory Allocation Library,\r
+ then ASSERT().\r
+ If Pages is zero, then ASSERT().\r
+ \r
+ @param Buffer Pointer to the buffer of pages to free.\r
+ @param Pages The number of 4 KB pages to free.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+FreePages (\r
+ IN VOID *Buffer,\r
+ IN UINTN Pages\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ ASSERT (Pages != 0);\r
+ Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r
+ ASSERT_EFI_ERROR (Status);\r
+}\r
+\r
+/**\r
+ Allocates one or more 4KB pages of a certain memory type at a specified alignment.\r
+\r
+ Allocates the number of 4KB pages specified by Pages of a certain memory type with an alignment\r
+ specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is returned.\r
+ If there is not enough memory at the specified alignment remaining to satisfy the request, then\r
+ NULL is returned.\r
+ If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r
+\r
+ @param MemoryType The type of memory to allocate.\r
+ @param Pages The number of 4 KB pages to allocate.\r
+ @param Alignment The requested alignment of the allocation. Must be a power of two.\r
+ If Alignment is zero, then byte alignment is used.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+InternalAllocateAlignedPages (\r
+ IN EFI_MEMORY_TYPE MemoryType, \r
+ IN UINTN Pages,\r
+ IN UINTN Alignment\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_PHYSICAL_ADDRESS Memory;\r
+ UINTN AlignedMemory;\r
+ UINTN AlignmentMask;\r
+ UINTN UnalignedPages;\r
+ UINTN RealPages;\r
+\r
+ //\r
+ // Alignment must be a power of two or zero.\r
+ //\r
+ ASSERT ((Alignment & (Alignment - 1)) == 0);\r
+ \r
+ if (Pages == 0) {\r
+ return NULL;\r
+ }\r
+ if (Alignment > EFI_PAGE_SIZE) {\r
+ //\r
+ // Caculate the total number of pages since alignment is larger than page size.\r
+ //\r
+ AlignmentMask = Alignment - 1;\r
+ RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);\r
+ //\r
+ // Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.\r
+ //\r
+ ASSERT (RealPages > Pages);\r
+ \r
+ Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);\r
+ if (EFI_ERROR (Status)) {\r
+ return NULL;\r
+ }\r
+ AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;\r
+ UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);\r
+ if (UnalignedPages > 0) {\r
+ //\r
+ // Free first unaligned page(s).\r
+ //\r
+ Status = gSmst->SmmFreePages (Memory, UnalignedPages);\r
+ ASSERT_EFI_ERROR (Status);\r
+ }\r
+ Memory = (EFI_PHYSICAL_ADDRESS) (AlignedMemory + EFI_PAGES_TO_SIZE (Pages));\r
+ UnalignedPages = RealPages - Pages - UnalignedPages;\r
+ if (UnalignedPages > 0) {\r
+ //\r
+ // Free last unaligned page(s).\r
+ //\r
+ Status = gSmst->SmmFreePages (Memory, UnalignedPages);\r
+ ASSERT_EFI_ERROR (Status);\r
+ }\r
+ } else {\r
+ //\r
+ // Do not over-allocate pages in this case.\r
+ //\r
+ Status = gSmst->SmmAllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r
+ if (EFI_ERROR (Status)) {\r
+ return NULL;\r
+ }\r
+ AlignedMemory = (UINTN) Memory;\r
+ }\r
+ return (VOID *) AlignedMemory;\r
+}\r
+\r
+/**\r
+ Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.\r
+\r
+ Allocates the number of 4KB pages specified by Pages of type EfiBootServicesData with an\r
+ alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r
+ returned. If there is not enough memory at the specified alignment remaining to satisfy the\r
+ request, then NULL is returned.\r
+ \r
+ If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r
+\r
+ @param Pages The number of 4 KB pages to allocate.\r
+ @param Alignment The requested alignment of the allocation. Must be a power of two.\r
+ If Alignment is zero, then byte alignment is used.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateAlignedPages (\r
+ IN UINTN Pages,\r
+ IN UINTN Alignment\r
+ )\r
+{\r
+ return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r
+}\r
+\r
+/**\r
+ Allocates one or more 4KB pages of type EfiRuntimeServicesData at a specified alignment.\r
+\r
+ Allocates the number of 4KB pages specified by Pages of type EfiRuntimeServicesData with an\r
+ alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r
+ returned. If there is not enough memory at the specified alignment remaining to satisfy the\r
+ request, then NULL is returned.\r
+ \r
+ If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r
+\r
+ @param Pages The number of 4 KB pages to allocate.\r
+ @param Alignment The requested alignment of the allocation. Must be a power of two.\r
+ If Alignment is zero, then byte alignment is used.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateAlignedRuntimePages (\r
+ IN UINTN Pages,\r
+ IN UINTN Alignment\r
+ )\r
+{\r
+ return InternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);\r
+}\r
+\r
+/**\r
+ Allocates one or more 4KB pages of type EfiReservedMemoryType at a specified alignment.\r
+\r
+ Allocates the number of 4KB pages specified by Pages of type EfiReservedMemoryType with an\r
+ alignment specified by Alignment. The allocated buffer is returned. If Pages is 0, then NULL is\r
+ returned. If there is not enough memory at the specified alignment remaining to satisfy the\r
+ request, then NULL is returned.\r
+ \r
+ If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r
+\r
+ @param Pages The number of 4 KB pages to allocate.\r
+ @param Alignment The requested alignment of the allocation. Must be a power of two.\r
+ If Alignment is zero, then byte alignment is used.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateAlignedReservedPages (\r
+ IN UINTN Pages,\r
+ IN UINTN Alignment\r
+ )\r
+{\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Frees one or more 4KB pages that were previously allocated with one of the aligned page\r
+ allocation functions in the Memory Allocation Library.\r
+\r
+ Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer. Buffer\r
+ must have been allocated on a previous call to the aligned page allocation services of the Memory\r
+ Allocation Library. If it is not possible to free allocated pages, then this function will \r
+ perform no actions.\r
+ \r
+ If Buffer was not allocated with an aligned page allocation function in the Memory Allocation\r
+ Library, then ASSERT().\r
+ If Pages is zero, then ASSERT().\r
+ \r
+ @param Buffer Pointer to the buffer of pages to free.\r
+ @param Pages The number of 4 KB pages to free.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+FreeAlignedPages (\r
+ IN VOID *Buffer,\r
+ IN UINTN Pages\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ ASSERT (Pages != 0);\r
+ Status = gSmst->SmmFreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);\r
+ ASSERT_EFI_ERROR (Status);\r
+}\r
+\r
+/**\r
+ Allocates a buffer of a certain pool type.\r
+\r
+ Allocates the number bytes specified by AllocationSize of a certain pool type and returns a\r
+ pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r
+ returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r
+\r
+ @param MemoryType The type of memory to allocate.\r
+ @param AllocationSize The number of bytes to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+InternalAllocatePool (\r
+ IN EFI_MEMORY_TYPE MemoryType, \r
+ IN UINTN AllocationSize\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ VOID *Memory;\r
+\r
+ Status = gSmst->SmmAllocatePool (MemoryType, AllocationSize, &Memory);\r
+ if (EFI_ERROR (Status)) {\r
+ Memory = NULL;\r
+ }\r
+ return Memory;\r
+}\r
+\r
+/**\r
+ Allocates a buffer of type EfiBootServicesData.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiBootServicesData and returns a\r
+ pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r
+ returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r
+\r
+ @param AllocationSize The number of bytes to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocatePool (\r
+ IN UINTN AllocationSize\r
+ )\r
+{\r
+ return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r
+}\r
+\r
+/**\r
+ Allocates a buffer of type EfiRuntimeServicesData.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData and returns\r
+ a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r
+ returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r
+\r
+ @param AllocationSize The number of bytes to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateRuntimePool (\r
+ IN UINTN AllocationSize\r
+ )\r
+{\r
+ return InternalAllocatePool (EfiRuntimeServicesData, AllocationSize);\r
+}\r
+\r
+/**\r
+ Allocates a buffer of type EfiReservedMemoryType.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType and returns\r
+ a pointer to the allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is\r
+ returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.\r
+\r
+ @param AllocationSize The number of bytes to allocate.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateReservedPool (\r
+ IN UINTN AllocationSize\r
+ )\r
+{\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Allocates and zeros a buffer of a certain pool type.\r
+\r
+ Allocates the number bytes specified by AllocationSize of a certain pool type, clears the buffer\r
+ with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a valid\r
+ buffer of 0 size is returned. If there is not enough memory remaining to satisfy the request,\r
+ then NULL is returned.\r
+\r
+ @param PoolType The type of memory to allocate.\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+InternalAllocateZeroPool (\r
+ IN EFI_MEMORY_TYPE PoolType, \r
+ IN UINTN AllocationSize\r
+ ) \r
+{\r
+ VOID *Memory;\r
+\r
+ Memory = InternalAllocatePool (PoolType, AllocationSize);\r
+ if (Memory != NULL) {\r
+ Memory = ZeroMem (Memory, AllocationSize);\r
+ }\r
+ return Memory;\r
+}\r
+\r
+/**\r
+ Allocates and zeros a buffer of type EfiBootServicesData.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the\r
+ buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r
+ valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r
+ request, then NULL is returned.\r
+\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateZeroPool (\r
+ IN UINTN AllocationSize\r
+ )\r
+{\r
+ return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r
+}\r
+\r
+/**\r
+ Allocates and zeros a buffer of type EfiRuntimeServicesData.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, clears the\r
+ buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r
+ valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r
+ request, then NULL is returned.\r
+\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateRuntimeZeroPool (\r
+ IN UINTN AllocationSize\r
+ )\r
+{\r
+ return InternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);\r
+}\r
+\r
+/**\r
+ Allocates and zeros a buffer of type EfiReservedMemoryType.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, clears the\r
+ buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a\r
+ valid buffer of 0 size is returned. If there is not enough memory remaining to satisfy the\r
+ request, then NULL is returned.\r
+\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateReservedZeroPool (\r
+ IN UINTN AllocationSize\r
+ )\r
+{\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Copies a buffer to an allocated buffer of a certain pool type.\r
+\r
+ Allocates the number bytes specified by AllocationSize of a certain pool type, copies\r
+ AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r
+ allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r
+ is not enough memory remaining to satisfy the request, then NULL is returned.\r
+ If Buffer is NULL, then ASSERT().\r
+ If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r
+\r
+ @param PoolType The type of pool to allocate.\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+ @param Buffer The buffer to copy to the allocated buffer.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+InternalAllocateCopyPool (\r
+ IN EFI_MEMORY_TYPE PoolType, \r
+ IN UINTN AllocationSize,\r
+ IN CONST VOID *Buffer\r
+ ) \r
+{\r
+ VOID *Memory;\r
+\r
+ ASSERT (Buffer != NULL);\r
+ ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));\r
+\r
+ Memory = InternalAllocatePool (PoolType, AllocationSize);\r
+ if (Memory != NULL) {\r
+ Memory = CopyMem (Memory, Buffer, AllocationSize);\r
+ }\r
+ return Memory;\r
+} \r
+\r
+/**\r
+ Copies a buffer to an allocated buffer of type EfiBootServicesData.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, copies\r
+ AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r
+ allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r
+ is not enough memory remaining to satisfy the request, then NULL is returned.\r
+ \r
+ If Buffer is NULL, then ASSERT().\r
+ If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r
+\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+ @param Buffer The buffer to copy to the allocated buffer.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateCopyPool (\r
+ IN UINTN AllocationSize,\r
+ IN CONST VOID *Buffer\r
+ )\r
+{\r
+ return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);\r
+}\r
+\r
+/**\r
+ Copies a buffer to an allocated buffer of type EfiRuntimeServicesData.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData, copies\r
+ AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r
+ allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r
+ is not enough memory remaining to satisfy the request, then NULL is returned.\r
+ \r
+ If Buffer is NULL, then ASSERT().\r
+ If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r
+\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+ @param Buffer The buffer to copy to the allocated buffer.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateRuntimeCopyPool (\r
+ IN UINTN AllocationSize,\r
+ IN CONST VOID *Buffer\r
+ )\r
+{\r
+ return InternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);\r
+}\r
+\r
+/**\r
+ Copies a buffer to an allocated buffer of type EfiReservedMemoryType.\r
+\r
+ Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType, copies\r
+ AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the\r
+ allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there\r
+ is not enough memory remaining to satisfy the request, then NULL is returned.\r
+ \r
+ If Buffer is NULL, then ASSERT().\r
+ If AllocationSize is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r
+\r
+ @param AllocationSize The number of bytes to allocate and zero.\r
+ @param Buffer The buffer to copy to the allocated buffer.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+AllocateReservedCopyPool (\r
+ IN UINTN AllocationSize,\r
+ IN CONST VOID *Buffer\r
+ )\r
+{\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Reallocates a buffer of a specified memory type.\r
+\r
+ Allocates and zeros the number bytes specified by NewSize from memory of the type\r
+ specified by PoolType. If OldBuffer is not NULL, then the smaller of OldSize and \r
+ NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r
+ OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r
+ If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r
+ enough memory remaining to satisfy the request, then NULL is returned.\r
+ \r
+ If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r
+ is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r
+\r
+ @param PoolType The type of pool to allocate.\r
+ @param OldSize The size, in bytes, of OldBuffer.\r
+ @param NewSize The size, in bytes, of the buffer to reallocate.\r
+ @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r
+ parameter that may be NULL.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+InternalReallocatePool (\r
+ IN EFI_MEMORY_TYPE PoolType, \r
+ IN UINTN OldSize,\r
+ IN UINTN NewSize,\r
+ IN VOID *OldBuffer OPTIONAL\r
+ )\r
+{\r
+ VOID *NewBuffer;\r
+\r
+ NewBuffer = InternalAllocateZeroPool (PoolType, NewSize);\r
+ if (NewBuffer != NULL && OldBuffer != NULL) {\r
+ CopyMem (NewBuffer, OldBuffer, MIN (OldSize, NewSize));\r
+ FreePool (OldBuffer);\r
+ }\r
+ return NewBuffer;\r
+}\r
+\r
+/**\r
+ Reallocates a buffer of type EfiBootServicesData.\r
+\r
+ Allocates and zeros the number bytes specified by NewSize from memory of type\r
+ EfiBootServicesData. If OldBuffer is not NULL, then the smaller of OldSize and \r
+ NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r
+ OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r
+ If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r
+ enough memory remaining to satisfy the request, then NULL is returned.\r
+ \r
+ If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r
+ is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r
+\r
+ @param OldSize The size, in bytes, of OldBuffer.\r
+ @param NewSize The size, in bytes, of the buffer to reallocate.\r
+ @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r
+ parameter that may be NULL.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+ReallocatePool (\r
+ IN UINTN OldSize,\r
+ IN UINTN NewSize,\r
+ IN VOID *OldBuffer OPTIONAL\r
+ )\r
+{\r
+ return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r
+}\r
+\r
+/**\r
+ Reallocates a buffer of type EfiRuntimeServicesData.\r
+\r
+ Allocates and zeros the number bytes specified by NewSize from memory of type\r
+ EfiRuntimeServicesData. If OldBuffer is not NULL, then the smaller of OldSize and \r
+ NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r
+ OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r
+ If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r
+ enough memory remaining to satisfy the request, then NULL is returned.\r
+\r
+ If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r
+ is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r
+\r
+ @param OldSize The size, in bytes, of OldBuffer.\r
+ @param NewSize The size, in bytes, of the buffer to reallocate.\r
+ @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r
+ parameter that may be NULL.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+ReallocateRuntimePool (\r
+ IN UINTN OldSize,\r
+ IN UINTN NewSize,\r
+ IN VOID *OldBuffer OPTIONAL\r
+ )\r
+{\r
+ return InternalReallocatePool (EfiRuntimeServicesData, OldSize, NewSize, OldBuffer);\r
+}\r
+\r
+/**\r
+ Reallocates a buffer of type EfiReservedMemoryType.\r
+\r
+ Allocates and zeros the number bytes specified by NewSize from memory of type\r
+ EfiReservedMemoryType. If OldBuffer is not NULL, then the smaller of OldSize and \r
+ NewSize bytes are copied from OldBuffer to the newly allocated buffer, and \r
+ OldBuffer is freed. A pointer to the newly allocated buffer is returned. \r
+ If NewSize is 0, then a valid buffer of 0 size is returned. If there is not \r
+ enough memory remaining to satisfy the request, then NULL is returned.\r
+\r
+ If the allocation of the new buffer is successful and the smaller of NewSize and OldSize\r
+ is greater than (MAX_ADDRESS - OldBuffer + 1), then ASSERT().\r
+\r
+ @param OldSize The size, in bytes, of OldBuffer.\r
+ @param NewSize The size, in bytes, of the buffer to reallocate.\r
+ @param OldBuffer The buffer to copy to the allocated buffer. This is an optional \r
+ parameter that may be NULL.\r
+\r
+ @return A pointer to the allocated buffer or NULL if allocation fails.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+ReallocateReservedPool (\r
+ IN UINTN OldSize,\r
+ IN UINTN NewSize,\r
+ IN VOID *OldBuffer OPTIONAL\r
+ )\r
+{\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Frees a buffer that was previously allocated with one of the pool allocation functions in the\r
+ Memory Allocation Library.\r
+\r
+ Frees the buffer specified by Buffer. Buffer must have been allocated on a previous call to the\r
+ pool allocation services of the Memory Allocation Library. If it is not possible to free pool\r
+ resources, then this function will perform no actions.\r
+ \r
+ If Buffer was not allocated with a pool allocation function in the Memory Allocation Library,\r
+ then ASSERT().\r
+\r
+ @param Buffer Pointer to the buffer to free.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+FreePool (\r
+ IN VOID *Buffer\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ Status = gSmst->SmmFreePool (Buffer);\r
+ ASSERT_EFI_ERROR (Status);\r
+}\r
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