arm-trusted-firmware/plat/arm/board/fvp/fvp_topology.c

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/*
* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
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*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <cassert.h>
#include <plat_arm.h>
#include <platform_def.h>
#include "drivers/pwrc/fvp_pwrc.h"
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/* 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;
}
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/*******************************************************************************
* 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.
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******************************************************************************/
int plat_core_pos_by_mpidr(u_register_t mpidr)
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{
if (arm_check_mpidr(mpidr) == -1)
return -1;
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if (fvp_pwrc_read_psysr(mpidr) == PSYSR_INVALID)
return -1;
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return plat_arm_calc_core_pos(mpidr);
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}