1/* 2 * Copyright (c) 2015, Linaro Limited 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include <asm.S> 29#include <arm.h> 30#include <platform_config.h> 31 32/* Let platforms override this if needed */ 33.weak get_core_pos_mpidr 34 35/* size_t get_core_pos(void); */ 36FUNC get_core_pos , : 37 mrs x0, mpidr_el1 38 b get_core_pos_mpidr 39END_FUNC get_core_pos 40 41/* size_t get_core_pos_mpidr(uint32_t mpidr); */ 42FUNC get_core_pos_mpidr , : 43 /* Calculate CorePos = (ClusterId * (cores/cluster)) + CoreId */ 44 and x1, x0, #MPIDR_CPU_MASK 45 and x0, x0, #MPIDR_CLUSTER_MASK 46 add x0, x1, x0, LSR #(MPIDR_CLUSTER_SHIFT - CFG_CORE_CLUSTER_SHIFT) 47 ret 48END_FUNC get_core_pos_mpidr 49