1 /* 2 * Copyright (c) 2015-2017, 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 31 #include <plat_arm.h> 32 33 #if ARM_PLAT_MT 34 #pragma weak plat_arm_get_cpu_pe_count 35 #endif 36 37 /****************************************************************************** 38 * This function implements a part of the critical interface between the psci 39 * generic layer and the platform that allows the former to query the platform 40 * to convert an MPIDR to a unique linear index. An error code (-1) is 41 * returned in case the MPIDR is invalid. 42 *****************************************************************************/ 43 int plat_core_pos_by_mpidr(u_register_t mpidr) 44 { 45 if (arm_check_mpidr(mpidr) == 0) 46 return plat_arm_calc_core_pos(mpidr); 47 48 return -1; 49 } 50 51 #if ARM_PLAT_MT 52 /****************************************************************************** 53 * This function returns the PE count within the physical cpu corresponding to 54 * `mpidr`. Now one cpu only have one thread, so just return 1. 55 *****************************************************************************/ 56 unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr) 57 { 58 return 1; 59 } 60 #endif /* ARM_PLAT_MT */ 61