plat/layerscape/board/ls1043/ls1043_topology.c

   1 /*
   2  * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #include <arch.h>
   8 #include <cassert.h>
   9 #include "plat_ls.h"
  10 #include "platform_def.h"
  11
  12 unsigned char ls1043_power_domain_tree_desc[LS1043_CLUSTER_COUNT + 1];
  13
  14
  15 CASSERT(LS1043_CLUSTER_COUNT && LS1043_CLUSTER_COUNT <= 256,
  16                 assert_invalid_ls1043_cluster_count);
  17
  18 /*******************************************************************************
  19  * This function dynamically constructs the topology according to
  20  * LS1043_CLUSTER_COUNT and returns it.
  21  ******************************************************************************/
  22 const unsigned char *plat_get_power_domain_tree_desc(void)
  23 {
  24         int i;
  25
  26         ls1043_power_domain_tree_desc[0] = LS1043_CLUSTER_COUNT;
  27
  28         for (i = 0; i < LS1043_CLUSTER_COUNT; i++)
  29                 ls1043_power_domain_tree_desc[i + 1] =
  30                                                 LS1043_MAX_CPUS_PER_CLUSTER;
  31
  32         return ls1043_power_domain_tree_desc;
  33 }
  34
  35 /*******************************************************************************
  36  * This function returns the core count within the cluster corresponding to
  37  * `mpidr`.
  38  ******************************************************************************/
  39 unsigned int plat_ls_get_cluster_core_count(u_register_t mpidr)
  40 {
  41         return LS1043_MAX_CPUS_PER_CLUSTER;
  42 }
  43
  44 /*******************************************************************************
  45  * This function implements a part of the critical interface between the psci
  46  * generic layer and the platform that allows the former to query the platform
  47  * to convert an MPIDR to a unique linear index. An error code (-1) is returned
  48  * in case the MPIDR is invalid.
  49  ******************************************************************************/
  50 int plat_core_pos_by_mpidr(u_register_t mpidr)
  51 {
  52         if (ls_check_mpidr(mpidr) == -1)
  53                 return -1;
  54
  55         return plat_ls_calc_core_pos(mpidr);
  56 }