--- /dev/null
+#\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 <AutoGen.h>\r
+#.include AsmMacroIoLib.inc\r
+\r
+#include <Chipset/ArmCortexA9.h>\r
+\r
+.text\r
+.align 2\r
+\r
+GCC_ASM_EXPORT(ArmGetCpuCountPerCluster)\r
+\r
+# IN None\r
+# OUT r0 = SCU Base Address\r
+ASM_PFX(ArmGetScuBaseAddress):\r
+ # Read Configuration Base Address Register. ArmCBar cannot be called to get\r
+ # the Configuration BAR as a stack is not necessary setup. The SCU is at the\r
+ # offset 0x0000 from the Private Memory Region.\r
+ mrc p15, 4, r0, c15, c0, 0\r
+ bx lr\r
+\r
+# IN None\r
+# OUT r0 = number of cores present in the system\r
+ASM_PFX(ArmGetCpuCountPerCluster):\r
+ stmfd SP!, {r1-r2}\r
+\r
+ # Read CP15 MIDR\r
+ mrc p15, 0, r1, c0, c0, 0\r
+\r
+ # Check if the CPU is A15\r
+ mov r1, r1, LSR #4\r
+ LoadConstantToReg (ARM_CPU_TYPE_MASK, r0)\r
+ and r1, r1, r0\r
+\r
+ LoadConstantToReg (ARM_CPU_TYPE_A15, r0)\r
+ cmp r1, r0\r
+ beq _Read_cp15_reg\r
+\r
+_CPU_is_not_A15:\r
+ mov r2, lr @ Save link register\r
+ bl ArmGetScuBaseAddress @ Read SCU Base Address\r
+ mov lr, r2 @ Restore link register val\r
+ ldr r0, [r0, #A9_SCU_CONFIG_OFFSET] @ Read SCU Config reg to get CPU count\r
+ b _Return\r
+\r
+_Read_cp15_reg:\r
+ mrc p15, 1, r0, c9, c0, 2 @ Read C9 register of CP15 to get CPU count\r
+ lsr r0, #24\r
+\r
+_Return:\r
+ and r0, r0, #3\r
+ # Add '1' to the number of CPU on the Cluster\r
+ add r0, r0, #1\r
+ ldmfd SP!, {r1-r2}\r
+ bx lr\r
+\r
+ASM_FUNCTION_REMOVE_IF_UNREFERENCED \r