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/*
* Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdint.h>
#include <platform_def.h>
#include <arch.h>
#include "qemu_private.h"
/* The power domain tree descriptor */
static unsigned char power_domain_tree_desc[] = {
/* Number of root nodes */
PLATFORM_CLUSTER_COUNT,
/* Number of children for the first node */
PLATFORM_CLUSTER0_CORE_COUNT,
/* Number of children for the second node */
PLATFORM_CLUSTER1_CORE_COUNT,
};
/*******************************************************************************
* This function returns the ARM default topology tree information.
******************************************************************************/
const unsigned char *plat_get_power_domain_tree_desc(void)
{
return 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;
if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER)
return -1;
return plat_qemu_calc_core_pos(mpidr);
}
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