-//\r
-// Copyright (c) 2011, ARM Limited. All rights reserved.\r
-//\r
-// This program and the accompanying materials\r
-// are licensed and made available under the terms and conditions of the BSD License\r
-// which accompanies this distribution. The full text of the license may be found at\r
-// http://opensource.org/licenses/bsd-license.php\r
-//\r
-// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-//\r
-//\r
-\r
-#include <AsmMacroIoLib.h>\r
-#include <Base.h>\r
-#include <Library/PcdLib.h>\r
-#include <Library/ArmPlatformLib.h>\r
-#include <ArmPlatform.h>\r
-#include <AutoGen.h>\r
-\r
- INCLUDE AsmMacroIoLib.inc\r
-\r
- EXPORT ArmPlatformIsMemoryInitialized\r
-\r
- PRESERVE8\r
- AREA CTA9x4Helper, CODE, READONLY\r
-\r
-/**\r
- Called at the early stage of the Boot phase to know if the memory has already been initialized\r
-\r
- Running the code from the reset vector does not mean we start from cold boot. In some case, we\r
- can go through this code with the memory already initialized.\r
- Because this function is called at the early stage, the implementation must not use the stack.\r
- Its implementation must probably done in assembly to ensure this requirement.\r
-\r
- @return Return the condition value into the 'Z' flag\r
-\r
-**/\r
-ArmPlatformIsMemoryInitialized\r
- // Check if the memory has been already mapped, if so skipped the memory initialization\r
- LoadConstantToReg (ARM_VE_SYS_CFGRW1_REG ,r0)\r
- ldr r0, [r0, #0]\r
- \r
- // 0x40000000 = Value of Physical Configuration Switch SW[0]\r
- and r0, r0, #0x40000000\r
- tst r0, #0x40000000\r
- bx lr\r
- \r