1/* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30#include <asm_macros.S> 31#include <platform_def.h> 32 33 .weak plat_arm_calc_core_pos 34 .weak plat_my_core_pos 35 36 /* ----------------------------------------------------- 37 * unsigned int plat_my_core_pos(void) 38 * This function uses the plat_arm_calc_core_pos() 39 * definition to get the index of the calling CPU. 40 * ----------------------------------------------------- 41 */ 42func plat_my_core_pos 43 ldcopr r0, MPIDR 44 b plat_arm_calc_core_pos 45endfunc plat_my_core_pos 46 47 /* ----------------------------------------------------- 48 * unsigned int plat_arm_calc_core_pos(uint64_t mpidr) 49 * Helper function to calculate the core position. 50 * With this function: CorePos = (ClusterId * 4) + 51 * CoreId 52 * ----------------------------------------------------- 53 */ 54func plat_arm_calc_core_pos 55 and r1, r0, #MPIDR_CPU_MASK 56 and r0, r0, #MPIDR_CLUSTER_MASK 57 add r0, r1, r0, LSR #6 58 bx lr 59endfunc plat_arm_calc_core_pos 60