1 /* 2 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <plat_arm.h> 8 #include <platform.h> 9 #include <assert.h> 10 11 #if ARM_PLAT_MT 12 #pragma weak plat_arm_get_cpu_pe_count 13 #endif 14 15 /****************************************************************************** 16 * This function implements a part of the critical interface between the psci 17 * generic layer and the platform that allows the former to query the platform 18 * to convert an MPIDR to a unique linear index. An error code (-1) is 19 * returned in case the MPIDR is invalid. 20 *****************************************************************************/ 21 int plat_core_pos_by_mpidr(u_register_t mpidr) 22 { 23 if (arm_check_mpidr(mpidr) == 0) { 24 #if ARM_PLAT_MT 25 assert((read_mpidr_el1() & MPIDR_MT_MASK) != 0); 26 27 /* 28 * The DTB files don't provide the MT bit in the mpidr argument 29 * so set it manually before calculating core position 30 */ 31 mpidr |= MPIDR_MT_MASK; 32 #endif 33 return plat_arm_calc_core_pos(mpidr); 34 } 35 return -1; 36 } 37 38 #if ARM_PLAT_MT 39 /****************************************************************************** 40 * This function returns the PE count within the physical cpu corresponding to 41 * `mpidr`. Now one cpu only have one thread, so just return 1. 42 *****************************************************************************/ 43 unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr) 44 { 45 return 1; 46 } 47 #endif /* ARM_PLAT_MT */ 48