1 /* 2 * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 /* Project Includes */ 8 #include <arch.h> 9 #include <arch_helpers.h> 10 #include <lib/psci/psci.h> 11 12 /* Platform Includes */ 13 #include <plat_helpers.h> 14 #include <platform_def.h> 15 16 const unsigned char mtk_power_domain_tree_desc[] = { 17 /* Number of root nodes */ 18 PLATFORM_SYSTEM_COUNT, 19 /* Number of children for the root node */ 20 PLATFORM_CLUSTER_COUNT, 21 /* Number of children for the first cluster node */ 22 PLATFORM_CLUSTER0_CORE_COUNT, 23 }; 24 25 /******************************************************************************* 26 * This function returns the MT8192 default topology tree information. 27 ******************************************************************************/ 28 const unsigned char *plat_get_power_domain_tree_desc(void) 29 { 30 return mtk_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 ******************************************************************************/ 39 int plat_core_pos_by_mpidr(u_register_t mpidr) 40 { 41 unsigned int cluster_id, cpu_id; 42 43 if (read_mpidr() & MPIDR_MT_MASK) { 44 /* ARMv8.2 arch */ 45 if (mpidr & (MPIDR_AFFLVL_MASK << MPIDR_AFF0_SHIFT)) { 46 return -1; 47 } 48 return plat_mediatek_calc_core_pos(mpidr); 49 } 50 51 mpidr &= MPIDR_AFFINITY_MASK; 52 53 if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) { 54 return -1; 55 } 56 57 cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 58 cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; 59 60 if (cluster_id >= PLATFORM_CLUSTER_COUNT) { 61 return -1; 62 } 63 64 /* 65 * Validate cpu_id by checking whether it represents a CPU in 66 * one of the two clusters present on the platform. 67 */ 68 if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER) { 69 return -1; 70 } 71 72 return (cpu_id + (cluster_id * 8)); 73 } 74