1 /* 2 * Copyright (c) 2013-2016, 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 <arch.h> 32 #include <cassert.h> 33 #include <plat_arm.h> 34 #include <platform_def.h> 35 #include "drivers/pwrc/fvp_pwrc.h" 36 37 /* The FVP power domain tree descriptor */ 38 unsigned char fvp_power_domain_tree_desc[FVP_CLUSTER_COUNT + 1]; 39 40 41 CASSERT(FVP_CLUSTER_COUNT && FVP_CLUSTER_COUNT <= 256, assert_invalid_fvp_cluster_count); 42 43 /******************************************************************************* 44 * This function dynamically constructs the topology according to 45 * FVP_CLUSTER_COUNT and returns it. 46 ******************************************************************************/ 47 const unsigned char *plat_get_power_domain_tree_desc(void) 48 { 49 int i; 50 51 /* 52 * The FVP power domain tree does not have a single system level power domain 53 * i.e. a single root node. The first entry in the power domain descriptor 54 * specifies the number of power domains at the highest power level. For the FVP 55 * this is the number of cluster power domains. 56 */ 57 fvp_power_domain_tree_desc[0] = FVP_CLUSTER_COUNT; 58 59 for (i = 0; i < FVP_CLUSTER_COUNT; i++) 60 fvp_power_domain_tree_desc[i + 1] = FVP_MAX_CPUS_PER_CLUSTER; 61 62 return fvp_power_domain_tree_desc; 63 } 64 65 /******************************************************************************* 66 * This function returns the core count within the cluster corresponding to 67 * `mpidr`. 68 ******************************************************************************/ 69 unsigned int plat_arm_get_cluster_core_count(u_register_t mpidr) 70 { 71 return FVP_MAX_CPUS_PER_CLUSTER; 72 } 73 74 /******************************************************************************* 75 * This function implements a part of the critical interface between the psci 76 * generic layer and the platform that allows the former to query the platform 77 * to convert an MPIDR to a unique linear index. An error code (-1) is returned 78 * in case the MPIDR is invalid. 79 ******************************************************************************/ 80 int plat_core_pos_by_mpidr(u_register_t mpidr) 81 { 82 if (arm_check_mpidr(mpidr) == -1) 83 return -1; 84 85 if (fvp_pwrc_read_psysr(mpidr) == PSYSR_INVALID) 86 return -1; 87 88 return plat_arm_calc_core_pos(mpidr); 89 } 90