1 /* 2 * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arm_def.h> 8 #include <css_pm.h> 9 #include <plat_arm.h> 10 #include <platform.h> 11 #include "juno_def.h" 12 13 /* 14 * On Juno, the system power level is the highest power level. 15 * The first entry in the power domain descriptor specifies the 16 * number of system power domains i.e. 1. 17 */ 18 #define JUNO_PWR_DOMAINS_AT_MAX_PWR_LVL ARM_SYSTEM_COUNT 19 20 /* 21 * The Juno power domain tree descriptor. The cluster power domains 22 * are arranged so that when the PSCI generic code creates the power 23 * domain tree, the indices of the CPU power domain nodes it allocates 24 * match the linear indices returned by plat_core_pos_by_mpidr() 25 * i.e. CLUSTER1 CPUs are allocated indices from 0 to 3 and the higher 26 * indices for CLUSTER0 CPUs. 27 */ 28 static const unsigned char juno_power_domain_tree_desc[] = { 29 /* No of root nodes */ 30 JUNO_PWR_DOMAINS_AT_MAX_PWR_LVL, 31 /* No of children for the root node */ 32 JUNO_CLUSTER_COUNT, 33 /* No of children for the first cluster node */ 34 JUNO_CLUSTER1_CORE_COUNT, 35 /* No of children for the second cluster node */ 36 JUNO_CLUSTER0_CORE_COUNT 37 }; 38 39 /******************************************************************************* 40 * This function returns the Juno topology tree information. 41 ******************************************************************************/ 42 const unsigned char *plat_get_power_domain_tree_desc(void) 43 { 44 return juno_power_domain_tree_desc; 45 } 46 47 /******************************************************************************* 48 * This function returns the core count within the cluster corresponding to 49 * `mpidr`. 50 ******************************************************************************/ 51 unsigned int plat_arm_get_cluster_core_count(u_register_t mpidr) 52 { 53 return (((mpidr & (u_register_t) 0x100) != 0U) ? 54 JUNO_CLUSTER1_CORE_COUNT : JUNO_CLUSTER0_CORE_COUNT); 55 } 56 57 /* 58 * The array mapping platform core position (implemented by plat_my_core_pos()) 59 * to the SCMI power domain ID implemented by SCP. 60 */ 61 const uint32_t plat_css_core_pos_to_scmi_dmn_id_map[PLATFORM_CORE_COUNT] = { 62 2, 3, 4, 5, 0, 1 }; 63