ArmPkg: Added Aarch64 support

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Harry Liebel <Harry.Liebel@arm.com>
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14486 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Library/BaseMemoryLibStm/AArch64/SetMem.c

@@ -0,0 +1,84 @@
+/** @file
+
+  Copyright (c) 2012-2013, ARM Ltd. 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 "MemLibInternals.h"
+
+/**
+  Set Buffer to Value for Size bytes.
+
+  @param  Buffer   Memory to set.
+  @param  Length   Number of bytes to set
+  @param  Value    Value of the set operation.
+
+  @return Buffer
+
+**/
+VOID *
+EFIAPI
+InternalMemSetMem (
+  OUT     VOID                      *Buffer,
+  IN      UINTN                     Length,
+  IN      UINT8                     Value
+  )
+{
+  //
+  // Declare the local variables that actually move the data elements as
+  // volatile to prevent the optimizer from replacing this function with
+  // the intrinsic memset()
+  //
+  volatile UINT8                    *Pointer8;
+  volatile UINT32                   *Pointer32;
+  volatile UINT64                   *Pointer64;
+  UINT32                            Value32;
+  UINT64                            Value64;
+
+  if ((((UINTN)Buffer & 0x7) == 0) && (Length >= 8)) {
+    // Generate the 64bit value
+    Value32 = (Value << 24) | (Value << 16) | (Value << 8) | Value;
+    Value64 = (((UINT64)Value32) << 32) | Value32;
+
+    Pointer64 = (UINT64*)Buffer;
+    while (Length >= 8) {
+      *(Pointer64++) = Value64;
+      Length -= 8;
+    }
+
+    // Finish with bytes if needed
+    Pointer8 = (UINT8*)Pointer64;
+    while (Length-- > 0) {
+      *(Pointer8++) = Value;
+    }
+  } else if ((((UINTN)Buffer & 0x3) == 0) && (Length >= 4)) {
+    // Generate the 32bit value
+    Value32 = (Value << 24) | (Value << 16) | (Value << 8) | Value;
+
+    Pointer32 = (UINT32*)Buffer;
+    while (Length >= 4) {
+      *(Pointer32++) = Value32;
+      Length -= 4;
+    }
+
+    // Finish with bytes if needed
+    Pointer8 = (UINT8*)Pointer32;
+    while (Length-- > 0) {
+      *(Pointer8++) = Value;
+    }
+  } else {
+    Pointer8 = (UINT8*)Buffer;
+    while (Length-- > 0) {
+      *(Pointer8++) = Value;
+    }
+  }
+  return Buffer;
+}