54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/*
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* Copyright (c) 2019, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <platform_def.h>
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/* The A5DS power domain tree descriptor */
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static const unsigned char a5ds_power_domain_tree_desc[] = {
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1,
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/* No of children for the root node */
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A5DS_CLUSTER_COUNT,
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/* No of children for the first cluster node */
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A5DS_CORE_COUNT,
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};
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/*******************************************************************************
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* This function returns the topology according to A5DS_CLUSTER_COUNT.
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******************************************************************************/
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const unsigned char *plat_get_power_domain_tree_desc(void)
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{
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return a5ds_power_domain_tree_desc;
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}
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/*******************************************************************************
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* Get core position using mpidr
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******************************************************************************/
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int plat_core_pos_by_mpidr(u_register_t mpidr)
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{
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unsigned int cluster_id, cpu_id;
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mpidr &= MPIDR_AFFINITY_MASK;
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if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK))
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return -1;
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cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
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cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;
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if (cluster_id >= A5DS_CLUSTER_COUNT)
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return -1;
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/*
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* Validate cpu_id by checking whether it represents a CPU in
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* one of the two clusters present on the platform.
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*/
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if (cpu_id >= A5DS_MAX_CPUS_PER_CLUSTER)
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return -1;
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return (cpu_id + (cluster_id * 4));
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}
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