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/*
* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <cassert.h>
#include <plat_arm.h>
#include <platform_def.h>
#include "drivers/pwrc/fvp_pwrc.h"
/* The FVP power domain tree descriptor */
unsigned char fvp_power_domain_tree_desc[FVP_CLUSTER_COUNT + 1];
CASSERT(FVP_CLUSTER_COUNT && FVP_CLUSTER_COUNT <= 256, assert_invalid_fvp_cluster_count);
/*******************************************************************************
* This function dynamically constructs the topology according to
* FVP_CLUSTER_COUNT and returns it.
******************************************************************************/
const unsigned char *plat_get_power_domain_tree_desc(void)
{
int i;
/*
* The FVP power domain tree does not have a single system level power domain
* i.e. a single root node. The first entry in the power domain descriptor
* specifies the number of power domains at the highest power level. For the FVP
* this is the number of cluster power domains.
*/
fvp_power_domain_tree_desc[0] = FVP_CLUSTER_COUNT;
for (i = 0; i < FVP_CLUSTER_COUNT; i++)
fvp_power_domain_tree_desc[i + 1] = FVP_MAX_CPUS_PER_CLUSTER;
return fvp_power_domain_tree_desc;
}
/*******************************************************************************
* This function returns the core count within the cluster corresponding to
* `mpidr`.
******************************************************************************/
unsigned int plat_arm_get_cluster_core_count(u_register_t mpidr)
{
return FVP_MAX_CPUS_PER_CLUSTER;
}
/*******************************************************************************
* 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)
{
if (arm_check_mpidr(mpidr) == -1)
return -1;
if (fvp_pwrc_read_psysr(mpidr) == PSYSR_INVALID)
return -1;
return plat_arm_calc_core_pos(mpidr);
}
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