sgi_topology.c

/*
 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <plat_arm.h>
#include <sgi_variant.h>

/* Topology */
/*
 * The power domain tree descriptor. The cluster power domains are
 * arranged so that when the PSCI generic code creates the power domain tree,
 * the indices of the CPU power domain nodes it allocates match the linear
 * indices returned by plat_core_pos_by_mpidr().
 */
const unsigned char sgi_pd_tree_desc[] = {
	PLAT_ARM_CLUSTER_COUNT,
	CSS_SGI_MAX_CPUS_PER_CLUSTER,
	CSS_SGI_MAX_CPUS_PER_CLUSTER
};

/* SGI-Clark.Helios platform consists of 16 physical CPUS and 32 threads */
const unsigned char sgi_clark_helios_pd_tree_desc[] = {
	PLAT_ARM_CLUSTER_COUNT,
	CSS_SGI_MAX_CPUS_PER_CLUSTER,
	CSS_SGI_MAX_CPUS_PER_CLUSTER,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU,
	CSS_SGI_MAX_PE_PER_CPU
};

/*******************************************************************************
 * This function returns the topology tree information.
 ******************************************************************************/
const unsigned char *plat_get_power_domain_tree_desc(void)
{
	if (sgi_plat_info.platform_id == SGI_CLARK_SID_VER_PART_NUM &&
	    sgi_plat_info.config_id == SGI_CLARK_HELIOS_CONFIG_ID)
		return sgi_clark_helios_pd_tree_desc;
	else
		return sgi_pd_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 CSS_SGI_MAX_CPUS_PER_CLUSTER;
}

/*******************************************************************************
 * The array mapping platform core position (implemented by plat_my_core_pos())
 * to the SCMI power domain ID implemented by SCP.
 ******************************************************************************/
const uint32_t plat_css_core_pos_to_scmi_dmn_id_map[32] = {
	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,		\
	16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
};

/******************************************************************************
 * Return the number of PE's supported by the CPU.
 *****************************************************************************/
unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr)
{
	return CSS_SGI_MAX_PE_PER_CPU;
}