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/*
* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <platform_def.h>
#include <arch.h>
#include <lib/psci/psci.h>
/*
* The HiKey power domain tree descriptor. The cluster power domains
* are arranged so that when the PSCI generic code creates the power
* domain tree, the indices of the CPU power domain nodes it allocates
* match the linear indices returned by plat_core_pos_by_mpidr().
*/
const unsigned char hikey_power_domain_tree_desc[] = {
/* Number of root nodes */
1,
/* Number of clusters */
PLATFORM_CLUSTER_COUNT,
/* Number of children for the first cluster node */
PLATFORM_CORE_COUNT_PER_CLUSTER,
/* Number of children for the second cluster node */
PLATFORM_CORE_COUNT_PER_CLUSTER,
};
/*******************************************************************************
* This function returns the HiKey topology tree information.
******************************************************************************/
const unsigned char *plat_get_power_domain_tree_desc(void)
{
return hikey_power_domain_tree_desc;
}
/*******************************************************************************
* This function implements a part of the critical interface between the psci
* generic layer and the platform that allows the former to query the platform
* to convert an MPIDR to a unique linear index. An error code (-1) is returned
* in case the MPIDR is invalid.
******************************************************************************/
int plat_core_pos_by_mpidr(u_register_t mpidr)
{
unsigned int cluster_id, cpu_id;
mpidr &= MPIDR_AFFINITY_MASK;
if (mpidr & ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK))
return -1;
cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;
if (cluster_id >= PLATFORM_CLUSTER_COUNT)
return -1;
/*
* Validate cpu_id by checking whether it represents a CPU in
* one of the two clusters present on the platform.
*/
if (cpu_id >= PLATFORM_CORE_COUNT_PER_CLUSTER)
return -1;
return (cpu_id + (cluster_id * 4));
}
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