1 /* 2 * Copyright (c) 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 31 #include <arch.h> 32 #include <psci.h> 33 #include <plat_arm.h> 34 #include <platform_def.h> 35 36 #define get_arm_cluster_core_count(mpidr)\ 37 (((mpidr) & 0x100) ? PLAT_ARM_CLUSTER1_CORE_COUNT :\ 38 PLAT_ARM_CLUSTER0_CORE_COUNT) 39 40 /* The power domain tree descriptor which need to be exported by ARM platforms */ 41 extern const unsigned char arm_power_domain_tree_desc[]; 42 43 44 /******************************************************************************* 45 * This function returns the ARM default topology tree information. 46 ******************************************************************************/ 47 const unsigned char *plat_get_power_domain_tree_desc(void) 48 { 49 return arm_power_domain_tree_desc; 50 } 51 52 /******************************************************************************* 53 * This function validates an MPIDR by checking whether it falls within the 54 * acceptable bounds. An error code (-1) is returned if an incorrect mpidr 55 * is passed. 56 ******************************************************************************/ 57 int arm_check_mpidr(u_register_t mpidr) 58 { 59 unsigned int cluster_id, cpu_id; 60 61 mpidr &= MPIDR_AFFINITY_MASK; 62 63 if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) 64 return -1; 65 66 cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; 67 cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; 68 69 if (cluster_id >= ARM_CLUSTER_COUNT) 70 return -1; 71 72 /* Validate cpu_id by checking whether it represents a CPU in 73 one of the two clusters present on the platform. */ 74 if (cpu_id >= get_arm_cluster_core_count(mpidr)) 75 return -1; 76 77 return 0; 78 } 79