| /* |
| * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <assert.h> |
| |
| #include <plat/arm/common/plat_arm.h> |
| #include <plat/common/platform.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 */ |