Adjust coding style for MemoryAllocationLib.

[mirror_edk2.git] / MdePkg / Library / DxeMemoryAllocationLib / MemoryAllocationLib.c

/** @file\r
  Support routines for memory allocation routines for use with drivers.\r
\r
  Copyright (c) 2006, 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
  Module Name:  MemoryAllocationLib.c\r
\r
**/\r
\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 = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);\r
  if (EFI_ERROR (Status)) {\r
    Memory = 0;\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 (EfiBootServicesData, 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 InternalAllocatePages (EfiReservedMemoryType, Pages);\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.\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 = gBS->FreePages ((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         = gBS->AllocatePages (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 ((UINTN) Memory - AlignedMemory);\r
    if (UnalignedPages > 0) {\r
      //\r
      // Free first unaligned page(s).\r
      //\r
      Status = gBS->FreePages (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 = gBS->FreePages (Memory, UnalignedPages);\r
      ASSERT_EFI_ERROR (Status);\r
    }\r
  } else {\r
    //\r
    // Do not over-allocate pages in this case.\r
    //\r
    Status = gBS->AllocatePages (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
  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 (EfiBootServicesData, 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
  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
  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 InternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);\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.\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 = gBS->FreePages ((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 = gBS->AllocatePool (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 (EfiBootServicesData, 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 EfieservedMemoryType.\r
\r
  Allocates the number bytes specified by AllocationSize of type EfieservedMemoryType 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 InternalAllocatePool (EfiReservedMemoryType, AllocationSize);\r
}\r
\r
/**\r
  Allocates and zeros a buffer of a certian pool type.\r
\r
  Allocates the number bytes specified by AllocationSize of a certian 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 (EfiBootServicesData, 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 InternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);\r
}\r
\r
/**\r
  Copies a buffer to an allocated buffer of a certian pool type.\r
\r
  Allocates the number bytes specified by AllocationSize of a certian 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