16ec0c65bSUsama Arif/* 2*3960bcdaSJagdish Gediya * Copyright (c) 2024, ARM Limited and Contributors. All rights reserved. 36ec0c65bSUsama Arif * 46ec0c65bSUsama Arif * SPDX-License-Identifier: BSD-3-Clause 56ec0c65bSUsama Arif */ 66ec0c65bSUsama Arif 76ec0c65bSUsama Arif#include <arch.h> 86ec0c65bSUsama Arif#include <asm_macros.S> 96ec0c65bSUsama Arif#include <platform_def.h> 106ec0c65bSUsama Arif#include <cpu_macros.S> 116ec0c65bSUsama Arif 126ec0c65bSUsama Arif .globl plat_arm_calc_core_pos 136ec0c65bSUsama Arif .globl plat_reset_handler 146ec0c65bSUsama Arif 156ec0c65bSUsama Arif /* --------------------------------------------------------------------- 166ec0c65bSUsama Arif * unsigned int plat_arm_calc_core_pos(u_register_t mpidr) 176ec0c65bSUsama Arif * 186ec0c65bSUsama Arif * Function to calculate the core position on TC. 196ec0c65bSUsama Arif * 206ec0c65bSUsama Arif * (ClusterId * PLAT_MAX_CPUS_PER_CLUSTER * PLAT_MAX_PE_PER_CPU) + 216ec0c65bSUsama Arif * (CPUId * PLAT_MAX_PE_PER_CPU) + 226ec0c65bSUsama Arif * ThreadId 236ec0c65bSUsama Arif * 246ec0c65bSUsama Arif * which can be simplified as: 256ec0c65bSUsama Arif * 266ec0c65bSUsama Arif * ((ClusterId * PLAT_MAX_CPUS_PER_CLUSTER + CPUId) * PLAT_MAX_PE_PER_CPU) 276ec0c65bSUsama Arif * + ThreadId 286ec0c65bSUsama Arif * --------------------------------------------------------------------- 296ec0c65bSUsama Arif */ 306ec0c65bSUsama Ariffunc plat_arm_calc_core_pos 316ec0c65bSUsama Arif /* 326ec0c65bSUsama Arif * Check for MT bit in MPIDR. If not set, shift MPIDR to left to make it 336ec0c65bSUsama Arif * look as if in a multi-threaded implementation. 346ec0c65bSUsama Arif */ 356ec0c65bSUsama Arif tst x0, #MPIDR_MT_MASK 366ec0c65bSUsama Arif lsl x3, x0, #MPIDR_AFFINITY_BITS 376ec0c65bSUsama Arif csel x3, x3, x0, eq 386ec0c65bSUsama Arif 396ec0c65bSUsama Arif /* Extract individual affinity fields from MPIDR */ 406ec0c65bSUsama Arif ubfx x0, x3, #MPIDR_AFF0_SHIFT, #MPIDR_AFFINITY_BITS 416ec0c65bSUsama Arif ubfx x1, x3, #MPIDR_AFF1_SHIFT, #MPIDR_AFFINITY_BITS 426ec0c65bSUsama Arif ubfx x2, x3, #MPIDR_AFF2_SHIFT, #MPIDR_AFFINITY_BITS 436ec0c65bSUsama Arif 446ec0c65bSUsama Arif /* Compute linear position */ 456ec0c65bSUsama Arif mov x4, #PLAT_MAX_CPUS_PER_CLUSTER 466ec0c65bSUsama Arif madd x1, x2, x4, x1 476ec0c65bSUsama Arif mov x5, #PLAT_MAX_PE_PER_CPU 486ec0c65bSUsama Arif madd x0, x1, x5, x0 496ec0c65bSUsama Arif ret 506ec0c65bSUsama Arifendfunc plat_arm_calc_core_pos 516ec0c65bSUsama Arif 526ec0c65bSUsama Arif /* ----------------------------------------------------- 536ec0c65bSUsama Arif * void plat_reset_handler(void); 546ec0c65bSUsama Arif * ----------------------------------------------------- 556ec0c65bSUsama Arif */ 566ec0c65bSUsama Ariffunc plat_reset_handler 576ec0c65bSUsama Arif ret 586ec0c65bSUsama Arifendfunc plat_reset_handler 59