ArmPlatformPkg/ArmPlatformLib: Added support for ArmPlatformIsPrimaryCore()

Checking if a core if the primary/boot core used to be done with the macro
IS_PRIMARY_CORE().
Some platforms exposes configuration registers to change the primary core.
Replacing the macro IS_PRIMARY_CORE() by ArmPlatformIsPrimaryCore() allows
some flexibility in the way to check the primary core.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Ryan Harkin <ryan.harkin@linaro.org>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14344 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/Arm/RTSMHelper.S

@@ -1,10 +1,10 @@
 #
-#  Copyright (c) 2011, ARM Limited. All rights reserved.
+#  Copyright (c) 2011-2013, ARM Limited. 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                                            
+#  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.             
@@ -15,7 +15,6 @@
 #include <Base.h>
 #include <Library/PcdLib.h>
 #include <AutoGen.h>
-#.include AsmMacroIoLib.inc
 
 #include <Chipset/ArmCortexA9.h>
 
@@ -23,6 +22,10 @@
 .align 2
 
 GCC_ASM_EXPORT(ArmGetCpuCountPerCluster)
+GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
+
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCore)
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
 
 # IN None
 # OUT r0 = SCU Base Address
@@ -68,4 +71,19 @@ _Return:
   ldmfd SP!, {r1-r2}
   bx lr
 
+//UINTN
+//ArmPlatformIsPrimaryCore (
+//  IN UINTN MpId
+//  );
+ASM_PFX(ArmPlatformIsPrimaryCore):
+  LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, r1)
+  ldr   r1, [r1]
+  and   r0, r0, r1
+  LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCore, r1)
+  ldr   r1, [r1]
+  cmp   r0, r1
+  moveq r0, #1
+  movne r0, #0
+  bx 	lr
+
 ASM_FUNCTION_REMOVE_IF_UNREFERENCED