blob: c435d8b41796fccd9c4d366e7f68f3101ce88592 [file] [log] [blame]
/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <asm_macros.S>
#include <platform_def.h>
.globl plat_is_my_cpu_primary
.globl plat_arm_calc_core_pos
/* -----------------------------------------------------
* unsigned int plat_is_my_cpu_primary (void);
*
* Find out whether the current cpu is the primary
* cpu (applicable only after a cold boot)
* -----------------------------------------------------
*/
func plat_is_my_cpu_primary
mov x9, x30
bl plat_my_core_pos
ldr x1, =SGI_BOOT_CFG_ADDR
ldr x1, [x1]
ubfx x1, x1, #PLAT_CSS_PRIMARY_CPU_SHIFT, \
#PLAT_CSS_PRIMARY_CPU_BIT_WIDTH
cmp x0, x1
cset w0, eq
ret x9
endfunc plat_is_my_cpu_primary
/* -----------------------------------------------------
* unsigned int plat_arm_calc_core_pos(uint64_t mpidr)
* Helper function to calculate the core position.
* -----------------------------------------------------
*/
func plat_arm_calc_core_pos
mrs x2, mpidr_el1
ands x2, x2, #MPIDR_MT_MASK
beq 1f
lsr x0, x0, #MPIDR_AFF1_SHIFT
1:
and x1, x0, #MPIDR_CPU_MASK
and x0, x0, #MPIDR_CLUSTER_MASK
add x0, x1, x0, LSR #6
and x0, x0, #MPIDR_AFFLVL_MASK
ret
endfunc plat_arm_calc_core_pos