1 /* 2 * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 #include <arch.h> 31 #include <platform_def.h> 32 #include <psci.h> 33 34 #if ENABLE_PLAT_COMPAT 35 unsigned int plat_get_aff_count(unsigned int aff_lvl, unsigned long mpidr) 36 { 37 /* Report 1 (absent) instance at levels higher that the cluster level */ 38 if (aff_lvl > MPIDR_AFFLVL1) 39 return PLATFORM_SYSTEM_COUNT; 40 41 if (aff_lvl == MPIDR_AFFLVL1) 42 return PLATFORM_CLUSTER_COUNT; 43 44 return mpidr & 0x100 ? PLATFORM_CLUSTER1_CORE_COUNT : 45 PLATFORM_CLUSTER0_CORE_COUNT; 46 } 47 48 unsigned int plat_get_aff_state(unsigned int aff_lvl, unsigned long mpidr) 49 { 50 return aff_lvl <= MPIDR_AFFLVL2 ? PSCI_AFF_PRESENT : PSCI_AFF_ABSENT; 51 } 52 53 int mt_setup_topology(void) 54 { 55 /* [TODO] Make topology configurable via SCC */ 56 return 0; 57 } 58 #else 59 60 const unsigned char mtk_power_domain_tree_desc[] = { 61 /* No of root nodes */ 62 PLATFORM_SYSTEM_COUNT, 63 /* No of children for the root node */ 64 PLATFORM_CLUSTER_COUNT, 65 /* No of children for the first cluster node */ 66 PLATFORM_CLUSTER0_CORE_COUNT, 67 /* No of children for the second cluster node */ 68 PLATFORM_CLUSTER1_CORE_COUNT 69 }; 70 71 /******************************************************************************* 72 * This function returns the MT8173 default topology tree information. 73 ******************************************************************************/ 74 const unsigned char *plat_get_power_domain_tree_desc(void) 75 { 76 return mtk_power_domain_tree_desc; 77 } 78 79 /******************************************************************************* 80 * This function implements a part of the critical interface between the psci 81 * generic layer and the platform that allows the former to query the platform 82 * to convert an MPIDR to a unique linear index. An error code (-1) is returned 83 * in case the MPIDR is invalid. 84 ******************************************************************************/ 85 int plat_core_pos_by_mpidr(u_register_t mpidr) 86 { 87 unsigned int cluster_id, cpu_id; 88 89 mpidr &= MPIDR_AFFINITY_MASK; 90 91 if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) 92 return -1; 93 94 cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 95 cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; 96 97 if (cluster_id >= PLATFORM_CLUSTER_COUNT) 98 return -1; 99 100 /* 101 * Validate cpu_id by checking whether it represents a CPU in 102 * one of the two clusters present on the platform. 103 */ 104 if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER) 105 return -1; 106 107 return (cpu_id + (cluster_id * 4)); 108 } 109 #endif 110