1/* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include <asm.S> 29#include <arm.h> 30#include <arm32_macros.S> 31 32/* Let platforms override this if needed */ 33.weak get_core_pos 34 35FUNC get_core_pos , : 36 read_mpidr r0 37 /* Calculate CorePos = (ClusterId * 4) + CoreId */ 38 and r1, r0, #MPIDR_CPU_MASK 39 and r0, r0, #MPIDR_CLUSTER_MASK 40 add r0, r1, r0, LSR #6 41 bx lr 42END_FUNC get_core_pos 43 44/* uint32_t read_usr_sp(void) */ 45FUNC read_usr_sp , : 46 mrs r1, cpsr 47 cps #CPSR_MODE_SYS 48 mov r0, sp 49 msr cpsr, r1 50 bx lr 51END_FUNC read_usr_sp 52 53/* uint32_t read_usr_lr(void) */ 54FUNC read_usr_lr , : 55 mrs r1, cpsr 56 cps #CPSR_MODE_SYS 57 mov r0, lr 58 msr cpsr, r1 59 bx lr 60END_FUNC read_usr_lr 61