1 files changed, 136 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseMemoryLibOptDxe/Arm/ScanMemGeneric.c b/roms/edk2/MdePkg/Library/BaseMemoryLibOptDxe/Arm/ScanMemGeneric.c
new file mode 100644
index 000000000..e0b4f2707
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseMemoryLibOptDxe/Arm/ScanMemGeneric.c
@@ -0,0 +1,136 @@
+/** @file
+  Architecture Independent Base Memory Library Implementation.
+
+  The following BaseMemoryLib instances contain the same copy of this file:
+    BaseMemoryLib
+    PeiMemoryLib
+    UefiMemoryLib
+
+  Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "../MemLibInternals.h"
+
+/**
+  Scans a target buffer for a 16-bit value, and returns a pointer to the
+  matching 16-bit value in the target buffer.
+
+  @param  Buffer  The pointer to the target buffer to scan.
+  @param  Length  The count of 16-bit value to scan. Must be non-zero.
+  @param  Value   The value to search for in the target buffer.
+
+  @return The pointer to the first occurrence, or NULL if not found.
+
+**/
+CONST VOID *
+EFIAPI
+InternalMemScanMem16 (
+  IN      CONST VOID                *Buffer,
+  IN      UINTN                     Length,
+  IN      UINT16                    Value
+  )
+{
+  CONST UINT16                      *Pointer;
+
+  Pointer = (CONST UINT16*)Buffer;
+  do {
+    if (*Pointer == Value) {
+      return Pointer;
+    }
+    ++Pointer;
+  } while (--Length != 0);
+  return NULL;
+}
+
+/**
+  Scans a target buffer for a 32-bit value, and returns a pointer to the
+  matching 32-bit value in the target buffer.
+
+  @param  Buffer  The pointer to the target buffer to scan.
+  @param  Length  The count of 32-bit value to scan. Must be non-zero.
+  @param  Value   The value to search for in the target buffer.
+
+  @return The pointer to the first occurrence, or NULL if not found.
+
+**/
+CONST VOID *
+EFIAPI
+InternalMemScanMem32 (
+  IN      CONST VOID                *Buffer,
+  IN      UINTN                     Length,
+  IN      UINT32                    Value
+  )
+{
+  CONST UINT32                      *Pointer;
+
+  Pointer = (CONST UINT32*)Buffer;
+  do {
+    if (*Pointer == Value) {
+      return Pointer;
+    }
+    ++Pointer;
+  } while (--Length != 0);
+  return NULL;
+}
+
+/**
+  Scans a target buffer for a 64-bit value, and returns a pointer to the
+  matching 64-bit value in the target buffer.
+
+  @param  Buffer  The pointer to the target buffer to scan.
+  @param  Length  The count of 64-bit value to scan. Must be non-zero.
+  @param  Value   The value to search for in the target buffer.
+
+  @return The pointer to the first occurrence, or NULL if not found.
+
+**/
+CONST VOID *
+EFIAPI
+InternalMemScanMem64 (
+  IN      CONST VOID                *Buffer,
+  IN      UINTN                     Length,
+  IN      UINT64                    Value
+  )
+{
+  CONST UINT64                      *Pointer;
+
+  Pointer = (CONST UINT64*)Buffer;
+  do {
+    if (*Pointer == Value) {
+      return Pointer;
+    }
+    ++Pointer;
+  } while (--Length != 0);
+  return NULL;
+}
+
+/**
+  Checks whether the contents of a buffer are all zeros.
+
+  @param  Buffer  The pointer to the buffer to be checked.
+  @param  Length  The size of the buffer (in bytes) to be checked.
+
+  @retval TRUE    Contents of the buffer are all zeros.
+  @retval FALSE   Contents of the buffer are not all zeros.
+
+**/
+BOOLEAN
+EFIAPI
+InternalMemIsZeroBuffer (
+  IN CONST VOID  *Buffer,
+  IN UINTN       Length
+  )
+{
+  CONST UINT8 *BufferData;
+  UINTN       Index;
+
+  BufferData = Buffer;
+  for (Index = 0; Index < Length; Index++) {
+    if (BufferData[Index] != 0) {
+      return FALSE;
+    }
+  }
+  return TRUE;
+}