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 <stdint.h> 8 9 #include <platform_def.h> 10 11 #include <arch.h> 12 13 #include "qemu_private.h" 14 15 /* The power domain tree descriptor */ 16 static unsigned char power_domain_tree_desc[] = { 17 /* Number of root nodes */ 18 PLATFORM_CLUSTER_COUNT, 19 /* Number of children for the first node */ 20 PLATFORM_CLUSTER0_CORE_COUNT, 21 /* Number of children for the second node */ 22 PLATFORM_CLUSTER1_CORE_COUNT, 23 }; 24 25 /******************************************************************************* 26 * This function returns the ARM default topology tree information. 27 ******************************************************************************/ plat_get_power_domain_tree_desc(void)28const unsigned char *plat_get_power_domain_tree_desc(void) 29 { 30 return power_domain_tree_desc; 31 } 32 33 /******************************************************************************* 34 * This function implements a part of the critical interface between the psci 35 * generic layer and the platform that allows the former to query the platform 36 * to convert an MPIDR to a unique linear index. An error code (-1) is returned 37 * in case the MPIDR is invalid. 38 ******************************************************************************/ plat_core_pos_by_mpidr(u_register_t mpidr)39int plat_core_pos_by_mpidr(u_register_t mpidr) 40 { 41 unsigned int cluster_id, cpu_id; 42 43 mpidr &= MPIDR_AFFINITY_MASK; 44 if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) 45 return -1; 46 47 cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 48 cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; 49 50 if (cluster_id >= PLATFORM_CLUSTER_COUNT) 51 return -1; 52 53 if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER) 54 return -1; 55 56 return plat_qemu_calc_core_pos(mpidr); 57 } 58