X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=OldMdePkg%2FLibrary%2FBaseLib%2FUnaligned.c;fp=OldMdePkg%2FLibrary%2FBaseLib%2FUnaligned.c;h=18c486d50f644b690c422e79c6e38a2a513b65b7;hp=0000000000000000000000000000000000000000;hb=586cd1f1f4129ab7ec24543d4968801e17cc870b;hpb=144d783d40c8a02113350feabd1b9a55b692313f

diff --git a/OldMdePkg/Library/BaseLib/Unaligned.c b/OldMdePkg/Library/BaseLib/Unaligned.c
new file mode 100644
index 0000000000..18c486d50f
--- /dev/null
+++ b/OldMdePkg/Library/BaseLib/Unaligned.c
@@ -0,0 +1,220 @@
+/** @file
+  Unaligned access functions of BaseLib.
+
+  Copyright (c) 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:  Unaligned.c
+
+**/
+
+/**
+  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  Pointer to a 16-bit value that may be unaligned.
+
+  @return *Uint16
+
+**/
+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  Pointer to a 16-bit value that may be unaligned.
+  @param  Value   16-bit value to write to Buffer.
+
+  @return Value
+
+**/
+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  Pointer to a 24-bit value that may be unaligned.
+
+  @return The value read.
+
+**/
+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  Pointer to a 24-bit value that may be unaligned.
+  @param  Value   24-bit value to write to Buffer.
+
+  @return The value written.
+
+**/
+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  Pointer to a 32-bit value that may be unaligned.
+
+  @return *Uint32
+
+**/
+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  Pointer to a 32-bit value that may be unaligned.
+  @param  Value   32-bit value to write to Buffer.
+
+  @return Value
+
+**/
+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  Pointer to a 64-bit value that may be unaligned.
+
+  @return *Uint64
+
+**/
+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  Pointer to a 64-bit value that may be unaligned.
+  @param  Value   64-bit value to write to Buffer.
+
+  @return Value
+
+**/
+UINT64
+EFIAPI
+WriteUnaligned64 (
+  OUT     UINT64                    *Buffer,
+  IN      UINT64                    Value
+  )
+{
+  ASSERT (Buffer != NULL);
+
+  return *Buffer = Value;
+}