blob: 893f28ff24137b6f5b8a434ab54301b485f6ecc3 [file] [log] [blame]
/*
* Copyright (c) 2015-2017, 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>
extern const unsigned char tegra_power_domain_tree_desc[];
#pragma weak plat_core_pos_by_mpidr
/*******************************************************************************
* This function returns the Tegra default topology tree information.
******************************************************************************/
const unsigned char *plat_get_power_domain_tree_desc(void)
{
return tegra_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;
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 PSCI_E_NOT_PRESENT;
/*
* Validate cpu_id by checking whether it represents a CPU in
* one of the two clusters present on the platform.
*/
if (cpu_id >= PLATFORM_MAX_CPUS_PER_CLUSTER)
return PSCI_E_NOT_PRESENT;
return (cpu_id + (cluster_id * 4));
}