1 /* 2 * Copyright (c) 2016, 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 31 #include <arm_def.h> 32 #include <plat_arm.h> 33 #include "juno_def.h" 34 35 /* 36 * On Juno, the system power level is the highest power level. 37 * The first entry in the power domain descriptor specifies the 38 * number of system power domains i.e. 1. 39 */ 40 #define JUNO_PWR_DOMAINS_AT_MAX_PWR_LVL ARM_SYSTEM_COUNT 41 42 /* 43 * The Juno power domain tree descriptor. The cluster power domains 44 * are arranged so that when the PSCI generic code creates the power 45 * domain tree, the indices of the CPU power domain nodes it allocates 46 * match the linear indices returned by plat_core_pos_by_mpidr() 47 * i.e. CLUSTER1 CPUs are allocated indices from 0 to 3 and the higher 48 * indices for CLUSTER0 CPUs. 49 */ 50 const unsigned char juno_power_domain_tree_desc[] = { 51 /* No of root nodes */ 52 JUNO_PWR_DOMAINS_AT_MAX_PWR_LVL, 53 /* No of children for the root node */ 54 JUNO_CLUSTER_COUNT, 55 /* No of children for the first cluster node */ 56 JUNO_CLUSTER1_CORE_COUNT, 57 /* No of children for the second cluster node */ 58 JUNO_CLUSTER0_CORE_COUNT 59 }; 60 61 /******************************************************************************* 62 * This function returns the Juno topology tree information. 63 ******************************************************************************/ 64 const unsigned char *plat_get_power_domain_tree_desc(void) 65 { 66 return juno_power_domain_tree_desc; 67 } 68 69 /******************************************************************************* 70 * This function returns the core count within the cluster corresponding to 71 * `mpidr`. 72 ******************************************************************************/ 73 unsigned int plat_arm_get_cluster_core_count(u_register_t mpidr) 74 { 75 return (((mpidr) & 0x100) ? JUNO_CLUSTER1_CORE_COUNT :\ 76 JUNO_CLUSTER0_CORE_COUNT); 77 } 78