74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/*
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* Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <arm_config.h>
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#include <cassert.h>
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#include <plat_arm.h>
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#include <platform_def.h>
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#include "drivers/pwrc/fvp_pwrc.h"
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/* The FVP power domain tree descriptor */
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unsigned char fvp_power_domain_tree_desc[FVP_CLUSTER_COUNT + 1];
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CASSERT(FVP_CLUSTER_COUNT && FVP_CLUSTER_COUNT <= 256, assert_invalid_fvp_cluster_count);
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/*******************************************************************************
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* This function dynamically constructs the topology according to
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* FVP_CLUSTER_COUNT and returns it.
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******************************************************************************/
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const unsigned char *plat_get_power_domain_tree_desc(void)
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{
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int i;
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/*
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* The FVP power domain tree does not have a single system level power domain
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* i.e. a single root node. The first entry in the power domain descriptor
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* specifies the number of power domains at the highest power level. For the FVP
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* this is the number of cluster power domains.
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*/
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fvp_power_domain_tree_desc[0] = FVP_CLUSTER_COUNT;
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for (i = 0; i < FVP_CLUSTER_COUNT; i++)
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fvp_power_domain_tree_desc[i + 1] = FVP_MAX_CPUS_PER_CLUSTER;
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return fvp_power_domain_tree_desc;
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}
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/*******************************************************************************
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* This function returns the core count within the cluster corresponding to
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* `mpidr`.
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******************************************************************************/
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unsigned int plat_arm_get_cluster_core_count(u_register_t mpidr)
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{
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return FVP_MAX_CPUS_PER_CLUSTER;
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}
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/*******************************************************************************
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* This function implements a part of the critical interface between the psci
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* generic layer and the platform that allows the former to query the platform
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* to convert an MPIDR to a unique linear index. An error code (-1) is returned
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* in case the MPIDR is invalid.
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******************************************************************************/
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int plat_core_pos_by_mpidr(u_register_t mpidr)
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{
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if (fvp_pwrc_read_psysr(mpidr) == PSYSR_INVALID)
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return -1;
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/*
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* Core position calculation for FVP platform depends on the MT bit in
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* MPIDR. This function cannot assume that the supplied MPIDR has the MT
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* bit set even if the implementation has. For example, PSCI clients
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* might supply MPIDR values without the MT bit set. Therefore, we
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* inject the current PE's MT bit so as to get the calculation correct.
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* This of course assumes that none or all CPUs on the platform has MT
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* bit set.
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*/
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mpidr |= (read_mpidr_el1() & MPIDR_MT_MASK);
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return plat_arm_calc_core_pos(mpidr);
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}
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