-#\r
-# Copyright (c) 2011-2012, 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