From f2abdc918bc19de53fe612458bf6c26298b65c1c Mon Sep 17 00:00:00 2001
From: yshang1 <yshang1@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 19 Jul 2007 08:36:30 +0000
Subject: Move RuntimeDxe to /Core of MdeModulePkg.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3363 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Core/RuntimeDxe/Crc32.c | 150 +++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 MdeModulePkg/Core/RuntimeDxe/Crc32.c

(limited to 'MdeModulePkg/Core/RuntimeDxe/Crc32.c')

diff --git a/MdeModulePkg/Core/RuntimeDxe/Crc32.c b/MdeModulePkg/Core/RuntimeDxe/Crc32.c
new file mode 100644
index 0000000000..910738eb52
--- /dev/null
+++ b/MdeModulePkg/Core/RuntimeDxe/Crc32.c
@@ -0,0 +1,150 @@
+/*++
+
+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:
+
+  Crc32.c
+
+Abstract:
+
+  CalculateCrc32 Boot Services as defined in DXE CIS.
+
+  This Boot Services is in the Runtime Driver because this service is
+  also required by SetVirtualAddressMap() when the EFI System Table and
+  EFI Runtime Services Table are converted from physical address to 
+  virtual addresses.  This requires that the 32-bit CRC be recomputed.
+
+Revision History:
+
+--*/
+
+//
+// The package level header files this module uses
+//
+#include <PiDxe.h>
+
+UINT32  mCrcTable[256];
+
+EFI_STATUS
+EFIAPI
+RuntimeDriverCalculateCrc32 (
+  IN  VOID    *Data,
+  IN  UINTN   DataSize,
+  OUT UINT32  *CrcOut
+  )
+/*++
+
+Routine Description:
+
+  Calculate CRC32 for target data
+
+Arguments:
+
+  Data     - The target data.
+  DataSize - The target data size.
+  CrcOut   - The CRC32 for target data.
+
+Returns:
+
+  EFI_SUCCESS           - The CRC32 for target data is calculated successfully.
+  EFI_INVALID_PARAMETER - Some parameter is not valid, so the CRC32 is not 
+                          calculated.
+
+--*/
+{
+  UINT32  Crc;
+  UINTN   Index;
+  UINT8   *Ptr;
+
+  if (Data == NULL || DataSize == 0 || CrcOut == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Crc = 0xffffffff;
+  for (Index = 0, Ptr = Data; Index < DataSize; Index++, Ptr++) {
+    Crc = (Crc >> 8) ^ mCrcTable[(UINT8) Crc ^ *Ptr];
+  }
+
+  *CrcOut = Crc ^ 0xffffffff;
+  return EFI_SUCCESS;
+}
+
+STATIC
+UINT32
+ReverseBits (
+  UINT32  Value
+  )
+/*++
+
+Routine Description:
+
+  Reverse bits for 32bit data.
+
+Arguments:
+
+  Value - the data to be reversed.
+
+Returns:
+
+  UINT32 data reversed.
+
+--*/
+{
+  UINTN   Index;
+  UINT32  NewValue;
+
+  NewValue = 0;
+  for (Index = 0; Index < 32; Index++) {
+    if (Value & (1 << Index)) {
+      NewValue = NewValue | (1 << (31 - Index));
+    }
+  }
+
+  return NewValue;
+}
+
+VOID
+RuntimeDriverInitializeCrc32Table (
+  VOID
+  )
+/*++
+
+Routine Description:
+
+  Initialize CRC32 table.
+
+Arguments:
+
+  None.
+
+Returns:
+
+  None.
+
+--*/
+{
+  UINTN   TableEntry;
+  UINTN   Index;
+  UINT32  Value;
+
+  for (TableEntry = 0; TableEntry < 256; TableEntry++) {
+    Value = ReverseBits ((UINT32) TableEntry);
+    for (Index = 0; Index < 8; Index++) {
+      if (Value & 0x80000000) {
+        Value = (Value << 1) ^ 0x04c11db7;
+      } else {
+        Value = Value << 1;
+      }
+    }
+
+    mCrcTable[TableEntry] = ReverseBits (Value);
+  }
+}
-- 
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