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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-04-29 Carl the first version
*
*/
#include "rtconfig.h"
.globl rt_hw_cpu_id
rt_hw_cpu_id:
mrc p15, 0, r0, c0, c0, 5
ubfx r0, r0, #0, #12
cmp r0, #0
beq core0
cmp r0, #1
beq core1
cmp r0, #256
beq core2
ldr r1,= #257
cmp r0, r1
beq core3
b default
core0:
mov r0, #0
b return
core1:
mov r0, #1
b return
core2:
mov r0, #2
b return
core3:
mov r0, #3
b return
default:
and r0, r0, #15
return:
bx lr
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