1 files changed, 75 insertions, 0 deletions
diff --git a/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJunoHelper.S b/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJunoHelper.S
new file mode 100755
index 000000000..fb5584f66
--- /dev/null
+++ b/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJunoHelper.S
@@ -0,0 +1,75 @@
+/** @file
+*
+*  Copyright (c) 2013-2014, 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
+*
+*  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 <AsmMacroIoLibV8.h>
+#include <Library/ArmLib.h>
+
+.text
+.align 3
+
+GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
+GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
+GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
+GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
+
+GCC_ASM_IMPORT(_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask)
+
+
+PrimaryCoreMpid:  .word
+
+//UINTN
+//ArmPlatformGetCorePosition (
+//  IN UINTN MpId
+//  );
+// With this function: CorePos = (ClusterId * 2) + CoreId
+ASM_PFX(ArmPlatformGetCorePosition):
+  and   x1, x0, #ARM_CORE_MASK
+  and   x0, x0, #ARM_CLUSTER_MASK
+  add   x0, x1, x0, LSR #7
+  ret
+
+//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+//  VOID
+//  );
+ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
+  ldr   x0, =PrimaryCoreMpid
+  ldrh  w0, [x0]
+  ret
+
+//UINTN
+//ArmPlatformIsPrimaryCore (
+//  IN UINTN MpId
+//  );
+ASM_PFX(ArmPlatformIsPrimaryCore):
+  LoadConstantToReg (_gPcd_FixedAtBuild_PcdArmPrimaryCoreMask, x1)
+  ldrh  w1, [x1]
+  and   x0, x0, x1
+
+  ldr   x1, =PrimaryCoreMpid
+  ldrh  w1, [x1]
+
+  cmp   w0, w1
+  mov   x0, #1
+  mov   x1, #0
+  csel  x0, x0, x1, eq
+  ret
+
+ASM_PFX(ArmPlatformPeiBootAction):
+  // The trusted firmware passes the primary CPU MPID through x0 register.
+  // Save it in a variable.
+  ldr  x1, =PrimaryCoreMpid
+  str  w0, [x1]
+  ret
+