1*d8820789SHadi Asyrafi /* 2*d8820789SHadi Asyrafi * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. 3*d8820789SHadi Asyrafi * 4*d8820789SHadi Asyrafi * SPDX-License-Identifier: BSD-3-Clause 5*d8820789SHadi Asyrafi */ 6*d8820789SHadi Asyrafi 7*d8820789SHadi Asyrafi #include <arch.h> 8*d8820789SHadi Asyrafi #include <platform_def.h> 9*d8820789SHadi Asyrafi #include <lib/psci/psci.h> 10*d8820789SHadi Asyrafi 11*d8820789SHadi Asyrafi static const unsigned char plat_power_domain_tree_desc[] = {1, 4}; 12*d8820789SHadi Asyrafi 13*d8820789SHadi Asyrafi /******************************************************************************* 14*d8820789SHadi Asyrafi * This function returns the default topology tree information. 15*d8820789SHadi Asyrafi ******************************************************************************/ 16*d8820789SHadi Asyrafi const unsigned char *plat_get_power_domain_tree_desc(void) 17*d8820789SHadi Asyrafi { 18*d8820789SHadi Asyrafi return plat_power_domain_tree_desc; 19*d8820789SHadi Asyrafi } 20*d8820789SHadi Asyrafi 21*d8820789SHadi Asyrafi /******************************************************************************* 22*d8820789SHadi Asyrafi * This function implements a part of the critical interface between the psci 23*d8820789SHadi Asyrafi * generic layer and the platform that allows the former to query the platform 24*d8820789SHadi Asyrafi * to convert an MPIDR to a unique linear index. An error code (-1) is returned 25*d8820789SHadi Asyrafi * in case the MPIDR is invalid. 26*d8820789SHadi Asyrafi ******************************************************************************/ 27*d8820789SHadi Asyrafi int plat_core_pos_by_mpidr(u_register_t mpidr) 28*d8820789SHadi Asyrafi { 29*d8820789SHadi Asyrafi unsigned int cluster_id, cpu_id; 30*d8820789SHadi Asyrafi 31*d8820789SHadi Asyrafi mpidr &= MPIDR_AFFINITY_MASK; 32*d8820789SHadi Asyrafi 33*d8820789SHadi Asyrafi if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) 34*d8820789SHadi Asyrafi return -1; 35*d8820789SHadi Asyrafi 36*d8820789SHadi Asyrafi cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 37*d8820789SHadi Asyrafi cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; 38*d8820789SHadi Asyrafi 39*d8820789SHadi Asyrafi if (cluster_id >= PLATFORM_CLUSTER_COUNT) 40*d8820789SHadi Asyrafi return -1; 41*d8820789SHadi Asyrafi 42*d8820789SHadi Asyrafi /* 43*d8820789SHadi Asyrafi * Validate cpu_id by checking whether it represents a CPU in 44*d8820789SHadi Asyrafi * one of the two clusters present on the platform. 45*d8820789SHadi Asyrafi */ 46*d8820789SHadi Asyrafi if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER) 47*d8820789SHadi Asyrafi return -1; 48*d8820789SHadi Asyrafi 49*d8820789SHadi Asyrafi return (cpu_id + (cluster_id * 4)); 50*d8820789SHadi Asyrafi } 51*d8820789SHadi Asyrafi 52