| Usama Arif | 82e9509 | 2019-06-18 16:46:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2019, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <platform_def.h> |
| 8 | |
| 9 | /* The A5DS power domain tree descriptor */ |
| 10 | static const unsigned char a5ds_power_domain_tree_desc[] = { |
| 11 | 1, |
| 12 | /* No of children for the root node */ |
| 13 | A5DS_CLUSTER_COUNT, |
| 14 | /* No of children for the first cluster node */ |
| 15 | A5DS_CORE_COUNT, |
| 16 | }; |
| 17 | |
| 18 | /******************************************************************************* |
| 19 | * This function returns the topology according to A5DS_CLUSTER_COUNT. |
| 20 | ******************************************************************************/ |
| 21 | const unsigned char *plat_get_power_domain_tree_desc(void) |
| 22 | { |
| 23 | return a5ds_power_domain_tree_desc; |
| 24 | } |
| 25 | |
| 26 | /******************************************************************************* |
| 27 | * Get core position using mpidr |
| 28 | ******************************************************************************/ |
| 29 | int plat_core_pos_by_mpidr(u_register_t mpidr) |
| 30 | { |
| 31 | unsigned int cluster_id, cpu_id; |
| 32 | |
| 33 | mpidr &= MPIDR_AFFINITY_MASK; |
| 34 | |
| 35 | if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) |
| 36 | return -1; |
| 37 | |
| 38 | cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; |
| 39 | cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; |
| 40 | |
| 41 | if (cluster_id >= A5DS_CLUSTER_COUNT) |
| 42 | return -1; |
| 43 | |
| 44 | /* |
| 45 | * Validate cpu_id by checking whether it represents a CPU in |
| 46 | * one of the two clusters present on the platform. |
| 47 | */ |
| 48 | if (cpu_id >= A5DS_MAX_CPUS_PER_CLUSTER) |
| 49 | return -1; |
| 50 | |
| 51 | return (cpu_id + (cluster_id * 4)); |
| 52 | |
| 53 | } |