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 <platform_def.h> 8 9 #include <lib/psci/psci.h> 10 #include <plat/common/platform.h> 11 12 /* 1 cluster, all cores into */ 13 static const unsigned char stm32mp1_power_domain_tree_desc[] = { 14 PLATFORM_CLUSTER_COUNT, 15 PLATFORM_CORE_COUNT, 16 }; 17 18 /* This function returns the platform topology */ plat_get_power_domain_tree_desc(void)19const unsigned char *plat_get_power_domain_tree_desc(void) 20 { 21 return stm32mp1_power_domain_tree_desc; 22 } 23 24 /******************************************************************************* 25 * This function implements a part of the critical interface between the psci 26 * generic layer and the platform that allows the former to query the platform 27 * to convert an MPIDR to a unique linear index. An error code (-1) is returned 28 * in case the MPIDR is invalid. 29 ******************************************************************************/ plat_core_pos_by_mpidr(u_register_t mpidr)30int plat_core_pos_by_mpidr(u_register_t mpidr) 31 { 32 unsigned int cluster_id, cpu_id; 33 u_register_t mpidr_copy = mpidr; 34 35 mpidr_copy &= MPIDR_AFFINITY_MASK; 36 37 if ((mpidr_copy & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) != 0U) { 38 return -1; 39 } 40 41 cluster_id = (mpidr_copy >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 42 cpu_id = (mpidr_copy >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; 43 44 if (cluster_id >= PLATFORM_CLUSTER_COUNT) { 45 return -1; 46 } 47 48 /* 49 * Validate cpu_id by checking whether it represents a CPU in one 50 * of the two clusters present on the platform. 51 */ 52 if (cpu_id >= PLATFORM_CORE_COUNT) { 53 return -1; 54 } 55 56 return (int)cpu_id; 57 } 58