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 <assert.h> 8 9 #include <plat/common/platform.h> 10 11 #include <plat_arm.h> 12 13 #if ARM_PLAT_MT 14 #pragma weak plat_arm_get_cpu_pe_count 15 #endif 16 17 /****************************************************************************** 18 * This function implements a part of the critical interface between the psci 19 * generic layer and the platform that allows the former to query the platform 20 * to convert an MPIDR to a unique linear index. An error code (-1) is 21 * returned in case the MPIDR is invalid. 22 *****************************************************************************/ 23 int plat_core_pos_by_mpidr(u_register_t mpidr) 24 { 25 if (arm_check_mpidr(mpidr) == 0) { 26 #if ARM_PLAT_MT 27 assert((read_mpidr_el1() & MPIDR_MT_MASK) != 0); 28 29 /* 30 * The DTB files don't provide the MT bit in the mpidr argument 31 * so set it manually before calculating core position 32 */ 33 mpidr |= MPIDR_MT_MASK; 34 #endif 35 return plat_arm_calc_core_pos(mpidr); 36 } 37 return -1; 38 } 39 40 #if ARM_PLAT_MT 41 /****************************************************************************** 42 * This function returns the PE count within the physical cpu corresponding to 43 * `mpidr`. Now one cpu only have one thread, so just return 1. 44 *****************************************************************************/ 45 unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr) 46 { 47 return 1; 48 } 49 #endif /* ARM_PLAT_MT */ 50