| Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 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_helpers.h> |
| 32 | #include <platform_def.h> |
| 33 | #include <psci.h> |
| 34 | |
| 35 | /******************************************************************************* |
| 36 | * This function implements a part of the critical interface between the psci |
| 37 | * generic layer and the platform to allow the former to detect the platform |
| 38 | * topology. psci queries the platform to determine how many affinity instances |
| 39 | * are present at a particular level for a given mpidr. |
| 40 | ******************************************************************************/ |
| 41 | unsigned int plat_get_aff_count(unsigned int aff_lvl, |
| 42 | unsigned long mpidr) |
| 43 | { |
| 44 | switch (aff_lvl) { |
| 45 | case MPIDR_AFFLVL2: |
| 46 | /* Last supported affinity level */ |
| 47 | return 1; |
| 48 | |
| 49 | case MPIDR_AFFLVL1: |
| 50 | /* Return # of clusters */ |
| 51 | return PLATFORM_CLUSTER_COUNT; |
| 52 | |
| 53 | case MPIDR_AFFLVL0: |
| 54 | /* # of cpus per cluster */ |
| 55 | return PLATFORM_MAX_CPUS_PER_CLUSTER; |
| 56 | |
| 57 | default: |
| 58 | return PSCI_AFF_ABSENT; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | /******************************************************************************* |
| 63 | * This function implements a part of the critical interface between the psci |
| 64 | * generic layer and the platform to allow the former to detect the state of a |
| 65 | * affinity instance in the platform topology. psci queries the platform to |
| 66 | * determine whether an affinity instance is present or absent. |
| 67 | ******************************************************************************/ |
| 68 | unsigned int plat_get_aff_state(unsigned int aff_lvl, |
| 69 | unsigned long mpidr) |
| 70 | { |
| 71 | return (aff_lvl <= MPIDR_AFFLVL2) ? PSCI_AFF_PRESENT : PSCI_AFF_ABSENT; |
| 72 | } |