1/* 2 * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <asm_macros.S> 32#include <cpu_data.h> 33 34.globl init_cpu_data_ptr 35.globl _cpu_data_by_mpidr 36.globl _cpu_data_by_index 37 38/* ----------------------------------------------------------------- 39 * void init_cpu_data_ptr(void) 40 * 41 * Initialise the TPIDR_EL3 register to refer to the cpu_data_t 42 * for the calling CPU. This must be called before cm_get_cpu_data() 43 * 44 * This can be called without a valid stack. 45 * clobbers: x0, x1, x9, x10 46 * ----------------------------------------------------------------- 47 */ 48func init_cpu_data_ptr 49 mov x10, x30 50 mrs x0, mpidr_el1 51 bl _cpu_data_by_mpidr 52 msr tpidr_el3, x0 53 ret x10 54 55 56/* ----------------------------------------------------------------- 57 * cpu_data_t *_cpu_data_by_mpidr(uint64_t mpidr) 58 * 59 * Return the cpu_data structure for the CPU with given MPIDR 60 * 61 * This can be called without a valid stack. It assumes that 62 * platform_get_core_pos() does not clobber register x9. 63 * clobbers: x0, x1, x9 64 * ----------------------------------------------------------------- 65 */ 66func _cpu_data_by_mpidr 67 mov x9, x30 68 bl platform_get_core_pos 69 mov x30, x9 70 b _cpu_data_by_index 71 72 73/* ----------------------------------------------------------------- 74 * cpu_data_t *_cpu_data_by_index(uint32_t cpu_index) 75 * 76 * Return the cpu_data structure for the CPU with given linear index 77 * 78 * This can be called without a valid stack. 79 * clobbers: x0, x1 80 * ----------------------------------------------------------------- 81 */ 82func _cpu_data_by_index 83 adr x1, percpu_data 84 add x0, x1, x0, LSL #CPU_DATA_LOG2SIZE 85 ret 86