Added to support X64 port (with SV5 ABI). May be able to remove after we port everything, but Sec, to EFI X64 ABI.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10683 6f19259b-4bc3-4df7-8a09-765794883524

UnixPkg/Library/UnixBaseLib/Unaligned.c

@@ -0,0 +1,222 @@
+/** @file
+  Unaligned access functions of BaseLib.
+
+  Copyright (c) 2006 - 2010, 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 "BaseLibInternals.h"
+
+
+/**
+  Reads a 16-bit value from memory that may be unaligned.
+
+  This function returns the 16-bit value pointed to by Buffer. The function
+  guarantees that the read operation does not produce an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 16-bit value that may be unaligned.
+
+  @return The 16-bit value read from Buffer.
+
+**/
+UINT16
+EFIAPI
+ReadUnaligned16 (
+  IN CONST UINT16              *Buffer
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer;
+}
+
+/**
+  Writes a 16-bit value to memory that may be unaligned.
+
+  This function writes the 16-bit value specified by Value to Buffer. Value is
+  returned. The function guarantees that the write operation does not produce
+  an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 16-bit value that may be unaligned.
+  @param  Value   16-bit value to write to Buffer.
+
+  @return The 16-bit value to write to Buffer.
+
+**/
+UINT16
+EFIAPI
+WriteUnaligned16 (
+  OUT UINT16                    *Buffer,
+  IN  UINT16                    Value
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer = Value;
+}
+
+/**
+  Reads a 24-bit value from memory that may be unaligned.
+
+  This function returns the 24-bit value pointed to by Buffer. The function
+  guarantees that the read operation does not produce an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 24-bit value that may be unaligned.
+
+  @return The 24-bit value read from Buffer.
+
+**/
+UINT32
+EFIAPI
+ReadUnaligned24 (
+  IN CONST UINT32              *Buffer
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer & 0xffffff;
+}
+
+/**
+  Writes a 24-bit value to memory that may be unaligned.
+
+  This function writes the 24-bit value specified by Value to Buffer. Value is
+  returned. The function guarantees that the write operation does not produce
+  an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 24-bit value that may be unaligned.
+  @param  Value   24-bit value to write to Buffer.
+
+  @return The 24-bit value to write to Buffer.
+
+**/
+UINT32
+EFIAPI
+WriteUnaligned24 (
+  OUT UINT32                    *Buffer,
+  IN  UINT32                    Value
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  *Buffer = BitFieldWrite32 (*Buffer, 0, 23, Value);
+  return Value;
+}
+
+/**
+  Reads a 32-bit value from memory that may be unaligned.
+
+  This function returns the 32-bit value pointed to by Buffer. The function
+  guarantees that the read operation does not produce an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 32-bit value that may be unaligned.
+
+  @return The 32-bit value read from Buffer.
+
+**/
+UINT32
+EFIAPI
+ReadUnaligned32 (
+  IN CONST UINT32              *Buffer
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer;
+}
+
+/**
+  Writes a 32-bit value to memory that may be unaligned.
+
+  This function writes the 32-bit value specified by Value to Buffer. Value is
+  returned. The function guarantees that the write operation does not produce
+  an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 32-bit value that may be unaligned.
+  @param  Value   The 32-bit value to write to Buffer.
+
+  @return The 32-bit value to write to Buffer.
+
+**/
+UINT32
+EFIAPI
+WriteUnaligned32 (
+  OUT UINT32                    *Buffer,
+  IN  UINT32                    Value
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer = Value;
+}
+
+/**
+  Reads a 64-bit value from memory that may be unaligned.
+
+  This function returns the 64-bit value pointed to by Buffer. The function
+  guarantees that the read operation does not produce an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 64-bit value that may be unaligned.
+
+  @return The 64-bit value read from Buffer.
+
+**/
+UINT64
+EFIAPI
+ReadUnaligned64 (
+  IN CONST UINT64              *Buffer
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer;
+}
+
+/**
+  Writes a 64-bit value to memory that may be unaligned.
+
+  This function writes the 64-bit value specified by Value to Buffer. Value is
+  returned. The function guarantees that the write operation does not produce
+  an alignment fault.
+
+  If the Buffer is NULL, then ASSERT().
+
+  @param  Buffer  A pointer to a 64-bit value that may be unaligned.
+  @param  Value   The 64-bit value to write to Buffer.
+
+  @return The 64-bit value to write to Buffer.
+
+**/
+UINT64
+EFIAPI
+WriteUnaligned64 (
+  OUT UINT64                    *Buffer,
+  IN  UINT64                    Value
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer = Value;
+}