| Jens Wiklander | 52c798e | 2015-12-07 14:37:10 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015-2016, 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 <platform_def.h> |
| 33 | #include "qemu_private.h" |
| 34 | #include <sys/types.h> |
| 35 | |
| 36 | /* The power domain tree descriptor */ |
| 37 | static unsigned char power_domain_tree_desc[] = { |
| 38 | /* Number of root nodes */ |
| 39 | PLATFORM_CLUSTER_COUNT, |
| 40 | /* Number of children for the first node */ |
| 41 | PLATFORM_CLUSTER0_CORE_COUNT, |
| 42 | /* Number of children for the second node */ |
| 43 | PLATFORM_CLUSTER1_CORE_COUNT, |
| 44 | }; |
| 45 | |
| 46 | /******************************************************************************* |
| 47 | * This function returns the ARM default topology tree information. |
| 48 | ******************************************************************************/ |
| 49 | const unsigned char *plat_get_power_domain_tree_desc(void) |
| 50 | { |
| 51 | return power_domain_tree_desc; |
| 52 | } |
| 53 | |
| 54 | /******************************************************************************* |
| 55 | * This function implements a part of the critical interface between the psci |
| 56 | * generic layer and the platform that allows the former to query the platform |
| 57 | * to convert an MPIDR to a unique linear index. An error code (-1) is returned |
| 58 | * in case the MPIDR is invalid. |
| 59 | ******************************************************************************/ |
| 60 | int plat_core_pos_by_mpidr(u_register_t mpidr) |
| 61 | { |
| 62 | unsigned int cluster_id, cpu_id; |
| 63 | |
| 64 | mpidr &= MPIDR_AFFINITY_MASK; |
| 65 | if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)) |
| 66 | return -1; |
| 67 | |
| 68 | cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK; |
| 69 | cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK; |
| 70 | |
| 71 | if (cluster_id >= PLATFORM_CLUSTER_COUNT) |
| 72 | return -1; |
| 73 | |
| 74 | if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER) |
| 75 | return -1; |
| 76 | |
| 77 | return plat_qemu_calc_core_pos(mpidr); |
| 78 | } |