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Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/DxeMemoryAllocationLib/MemoryAllocationLib.c')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/DxeMemoryAllocationLib/MemoryAllocationLib.c | 1079 |
1 files changed, 1079 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/DxeMemoryAllocationLib/MemoryAllocationLib.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/DxeMemoryAllocationLib/MemoryAllocationLib.c new file mode 100644 index 0000000..21a781c --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/DxeMemoryAllocationLib/MemoryAllocationLib.c @@ -0,0 +1,1079 @@ +/*++ + +Copyright (c) 2004 - 2006, Intel Corporation +All rights reserved. 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. + + +Module Name: + + MemoryAllocationLib.c + +Abstract: + + Support routines for memory allocation routines for use with drivers. + +--*/ + +#include "EdkIIGlueDxe.h" + + +/** + 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 = (gBS->AllocatePages) (AllocateAnyPages, MemoryType, Pages, &Memory); + if (EFI_ERROR (Status)) { + Memory = 0; + } + return (VOID *) (UINTN) Memory; +} + +/** + Allocates one or more 4KB pages of type EfiBootServicesData. + + Allocates the number of 4KB pages of type EfiBootServicesData 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 +GlueAllocatePages ( + IN UINTN Pages + ) +{ + return InternalAllocatePages (EfiBootServicesData, 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 InternalAllocatePages (EfiReservedMemoryType, Pages); +} + +/** + 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 Buffer was not allocated with a page allocation function in the Memory Allocation Library, + then ASSERT(). + If Pages is zero, then ASSERT(). + + @param Buffer Pointer to the buffer of pages to free. + @param Pages The number of 4 KB pages to free. + +**/ +VOID +EFIAPI +GlueFreePages ( + IN VOID *Buffer, + IN UINTN Pages + ) +{ + EFI_STATUS Status; + + ASSERT (Pages != 0); + 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(). + + @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) { + // + // Caculate 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 = (gBS->AllocatePages) (AllocateAnyPages, MemoryType, RealPages, &Memory); + if (EFI_ERROR (Status)) { + return NULL; + } + AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask; + UnalignedPages = EFI_SIZE_TO_PAGES ((UINTN) Memory - AlignedMemory); + if (UnalignedPages > 0) { + // + // Free first unaligned page(s). + // + Status = (gBS->FreePages) (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 = (gBS->FreePages) (Memory, UnalignedPages); + ASSERT_EFI_ERROR (Status); + } + } else { + // + // Do not over-allocate pages in this case. + // + Status = (gBS->AllocatePages) (AllocateAnyPages, MemoryType, Pages, &Memory); + if (EFI_ERROR (Status)) { + return NULL; + } + AlignedMemory = (UINTN) Memory; + } + return (VOID *) AlignedMemory; +} + +/** + 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 + ) +{ + return InternalAllocateAlignedPages (EfiBootServicesData, 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(). + + @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(). + + @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 InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment); +} + +/** + 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 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 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); + 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 = (gBS->AllocatePool) (MemoryType, AllocationSize, &Memory); + if (EFI_ERROR (Status)) { + Memory = NULL; + } + return Memory; +} + +/** + 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 +GlueAllocatePool ( + IN UINTN AllocationSize + ) +{ + return InternalAllocatePool (EfiBootServicesData, 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 EfieservedMemoryType. + + Allocates the number bytes specified by AllocationSize of type EfieservedMemoryType 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 InternalAllocatePool (EfiReservedMemoryType, AllocationSize); +} + +/** + Allocates and zeros a buffer of a certian pool type. + + Allocates the number bytes specified by AllocationSize of a certian 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 EfiBootServicesData. + + Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, clears the + buffer with zeros, and returns a pointer to the allocated buffer. If AllocationSize is 0, then a + 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 +GlueAllocateZeroPool ( + IN UINTN AllocationSize + ) +{ + return InternalAllocateZeroPool (EfiBootServicesData, 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 InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize); +} + +/** + Copies a buffer to an allocated buffer of a certian pool type. + + Allocates the number bytes specified by AllocationSize of a certian pool type, copies + AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the + allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there + is not enough memory remaining to satisfy the request, then NULL is returned. + If Buffer is NULL, then ASSERT(). + If AllocationSize is greater than (MAX_ADDRESS ?Buffer + 1), then ASSERT(). + + @param PoolType The type of pool to allocate. + @param AllocationSize The number of bytes to allocate and zero. + @param Buffer The buffer to copy to the allocated buffer. + + @return A pointer to the allocated buffer or NULL if allocation fails. + +**/ +VOID * +InternalAllocateCopyPool ( + IN EFI_MEMORY_TYPE PoolType, + IN UINTN AllocationSize, + IN CONST VOID *Buffer + ) +{ + VOID *Memory; + + ASSERT (Buffer != NULL); + ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1)); + + Memory = InternalAllocatePool (PoolType, AllocationSize); + if (Memory != NULL) { + Memory = CopyMem (Memory, Buffer, AllocationSize); + } + return Memory; +} + +/** + Copies a buffer to an allocated buffer of type EfiBootServicesData. + + Allocates the number bytes specified by AllocationSize of type EfiBootServicesData, copies + AllocationSize bytes from Buffer to the newly allocated buffer, and returns a pointer to the + allocated buffer. If AllocationSize is 0, then a valid buffer of 0 size is returned. If there + is not enough memory remaining to satisfy the request, then NULL is returned. + If Buffer is NULL, then ASSERT(). + If AllocationSize is greater than (MAX_ADDRESS ?Buffer + 1), then ASSERT(). + + @param AllocationSize The number of bytes to allocate and zero. + @param Buffer The buffer to copy to the allocated buffer. + + @return A pointer to the allocated buffer or NULL if allocation fails. + +**/ +VOID * +EFIAPI +GlueAllocateCopyPool ( + 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 +GlueFreePool ( + IN VOID *Buffer + ) +{ + EFI_STATUS Status; + + Status = (gBS->FreePool) (Buffer); + ASSERT_EFI_ERROR (Status); +} + +/** + Allocates a buffer of a certain pool type at a specified alignment. + + Allocates the number bytes specified by AllocationSize of a certain pool type with an alignment + specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, then a valid + buffer of 0 size 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 PoolType The type of pool to allocate. + @param AllocationSize The number of bytes 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. + If Alignment is zero, then byte alignment is used. + + @return A pointer to the allocated buffer or NULL if allocation fails. + +**/ +VOID * +InternalAllocateAlignedPool ( + IN EFI_MEMORY_TYPE PoolType, + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + VOID *RawAddress; + UINTN AlignedAddress; + UINTN AlignmentMask; + UINTN OverAllocationSize; + UINTN RealAllocationSize; + VOID **FreePointer; + + // + // Alignment must be a power of two or zero. + // + ASSERT ((Alignment & (Alignment - 1)) == 0); + + if (Alignment == 0) { + AlignmentMask = Alignment; + } else { + AlignmentMask = Alignment - 1; + } + // + // Calculate the extra memory size, over-allocate memory pool and get the aligned memory address. + // + OverAllocationSize = sizeof (RawAddress) + AlignmentMask; + RealAllocationSize = AllocationSize + OverAllocationSize; + // + // Make sure that AllocationSize plus OverAllocationSize does not overflow. + // + ASSERT (RealAllocationSize > AllocationSize); + + RawAddress = InternalAllocatePool (PoolType, RealAllocationSize); + if (RawAddress == NULL) { + return NULL; + } + AlignedAddress = ((UINTN) RawAddress + OverAllocationSize) & ~AlignmentMask; + // + // Save the original memory address just before the aligned address. + // + FreePointer = (VOID **)(AlignedAddress - sizeof (RawAddress)); + *FreePointer = RawAddress; + + return (VOID *) AlignedAddress; +} + +/** + Allocates a buffer of type EfiBootServicesData at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfiBootServicesData with an + alignment specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, + then a valid buffer of 0 size 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 AllocationSize The number of bytes 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 +AllocateAlignedPool ( + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedPool (EfiBootServicesData, AllocationSize, Alignment); +} + +/** + Allocates a buffer of type EfiRuntimeServicesData at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData with an + alignment specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, + then a valid buffer of 0 size 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 AllocationSize The number of bytes 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 +AllocateAlignedRuntimePool ( + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedPool (EfiRuntimeServicesData, AllocationSize, Alignment); +} + +/** + Allocates a buffer of type EfieservedMemoryType at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfieservedMemoryType with an + alignment specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, + then a valid buffer of 0 size 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 AllocationSize The number of bytes 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 +AllocateAlignedReservedPool ( + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedPool (EfiReservedMemoryType, AllocationSize, Alignment); +} + +/** + Allocates and zeros a buffer of a certain pool type at a specified alignment. + + Allocates the number bytes specified by AllocationSize of a certain pool type with an alignment + specified by Alignment, 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 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 PoolType The type of pool to allocate. + @param AllocationSize The number of bytes 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 * +InternalAllocateAlignedZeroPool ( + IN EFI_MEMORY_TYPE PoolType, + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + VOID *Memory; + Memory = InternalAllocateAlignedPool (PoolType, AllocationSize, Alignment); + if (Memory != NULL) { + Memory = ZeroMem (Memory, AllocationSize); + } + return Memory; +} + +/** + Allocates and zeros a buffer of type EfiBootServicesData at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfiBootServicesData with an + alignment specified by Alignment, 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 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 AllocationSize The number of bytes 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 +AllocateAlignedZeroPool ( + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedZeroPool (EfiBootServicesData, AllocationSize, Alignment); +} + +/** + Allocates and zeros a buffer of type EfiRuntimeServicesData at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData with an + alignment specified by Alignment, 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 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 AllocationSize The number of bytes 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 +AllocateAlignedRuntimeZeroPool ( + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedZeroPool (EfiRuntimeServicesData, AllocationSize, Alignment); +} + +/** + Allocates and zeros a buffer of type EfieservedMemoryType at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfieservedMemoryType with an + alignment specified by Alignment, 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 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 AllocationSize The number of bytes 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 +AllocateAlignedReservedZeroPool ( + IN UINTN AllocationSize, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedZeroPool (EfiReservedMemoryType, AllocationSize, Alignment); +} + +/** + Copies a buffer to an allocated buffer of a certain pool type at a specified alignment. + + Allocates the number bytes specified by AllocationSize of a certain pool type with an alignment + specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, then a valid + buffer of 0 size 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 PoolType The type of pool to allocate. + @param AllocationSize The number of bytes to allocate. + @param Buffer The buffer to copy to the allocated buffer. + @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 * +InternalAllocateAlignedCopyPool ( + IN EFI_MEMORY_TYPE PoolType, + IN UINTN AllocationSize, + IN CONST VOID *Buffer, + IN UINTN Alignment + ) +{ + VOID *Memory; + + ASSERT (Buffer != NULL); + ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1)); + + Memory = InternalAllocateAlignedPool (PoolType, AllocationSize, Alignment); + if (Memory != NULL) { + Memory = CopyMem (Memory, Buffer, AllocationSize); + } + return Memory; +} + +/** + Copies a buffer to an allocated buffer of type EfiBootServicesData at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfiBootServicesData type with an + alignment specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, + then a valid buffer of 0 size 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 AllocationSize The number of bytes to allocate. + @param Buffer The buffer to copy to the allocated buffer. + @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 +AllocateAlignedCopyPool ( + IN UINTN AllocationSize, + IN CONST VOID *Buffer, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedCopyPool (EfiBootServicesData, AllocationSize, Buffer, Alignment); +} + +/** + Copies a buffer to an allocated buffer of type EfiRuntimeServicesData at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfiRuntimeServicesData type with an + alignment specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, + then a valid buffer of 0 size 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 AllocationSize The number of bytes to allocate. + @param Buffer The buffer to copy to the allocated buffer. + @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 +AllocateAlignedRuntimeCopyPool ( + IN UINTN AllocationSize, + IN CONST VOID *Buffer, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer, Alignment); +} + +/** + Copies a buffer to an allocated buffer of type EfiReservedMemoryType at a specified alignment. + + Allocates the number bytes specified by AllocationSize of type EfiReservedMemoryType type with an + alignment specified by Alignment. The allocated buffer is returned. If AllocationSize is 0, + then a valid buffer of 0 size 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 AllocationSize The number of bytes to allocate. + @param Buffer The buffer to copy to the allocated buffer. + @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 +AllocateAlignedReservedCopyPool ( + IN UINTN AllocationSize, + IN CONST VOID *Buffer, + IN UINTN Alignment + ) +{ + return InternalAllocateAlignedCopyPool (EfiReservedMemoryType, AllocationSize, Buffer, Alignment); +} + +/** + Frees a buffer that was previously allocated with one of the aligned 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 + aligned pool allocation services of the Memory Allocation Library. + If Buffer was not allocated with an aligned pool allocation function in the Memory Allocation + Library, then ASSERT(). + + @param Buffer Pointer to the buffer to free. + +**/ +VOID +EFIAPI +FreeAlignedPool ( + IN VOID *Buffer + ) +{ + VOID *RawAddress; + VOID **FreePointer; + EFI_STATUS Status; + + // + // Get the pre-saved original address in the over-allocate pool. + // + FreePointer = (VOID **)((UINTN) Buffer - sizeof (RawAddress)); + RawAddress = *FreePointer; + + Status = (gBS->FreePool) (RawAddress); + ASSERT_EFI_ERROR (Status); +} |