text: /*
   * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
   *
   * SPDX-License-Identifier: BSD-3-Clause
   */
  
  #include <plat_arm.h>
  #include <platform.h>
  #include <assert.h>
  
  #if ARM_PLAT_MT
  #pragma weak plat_arm_get_cpu_pe_count
  #endif
  
  /******************************************************************************
   * 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) == 0) {
  #if ARM_PLAT_MT
  		assert((read_mpidr_el1() & MPIDR_MT_MASK) != 0);
  
  		/*
  		 * The DTB files don't provide the MT bit in the mpidr argument
  		 * so set it manually before calculating core position
  		 */
  		mpidr |= MPIDR_MT_MASK;
  #endif
  		return plat_arm_calc_core_pos(mpidr);
  	}
  	return -1;
  }
  
  #if ARM_PLAT_MT
  /******************************************************************************
   * This function returns the PE count within the physical cpu corresponding to
   * `mpidr`. Now one cpu only have one thread, so just return 1.
   *****************************************************************************/
  unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr)
  {
  	return 1;
  }
  #endif /* ARM_PLAT_MT */
  