1 /* 2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved. 3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, this list of 9 * conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 12 * of conditions and the following disclaimer in the documentation and/or other materials 13 * provided with the distribution. 14 * 15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 16 * to endorse or promote products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef __ASM_H 33 #define __ASM_H 34 35 #ifdef __cplusplus 36 #if __cplusplus 37 extern "C" { 38 #endif /* __cplusplus */ 39 #endif /* __cplusplus */ 40 41 #define FUNCTION(x) .global x; .text; .code 32; x: 42 #define MPIDR_CPUID_MASK 0xFFU 43 44 /* 45 * ------------------------------------------ 46 * stackTop | cpu n | ... | cpu 1 | cpu 0 | stackBottom 47 * ------------------------------------------ 48 * | stackSize | ... | stackSize | stackSize | 49 */ 50 .macro EXC_SP_SET stackBottom, stackSize, reg0, reg1 51 mrc p15, 0, \reg0, c0, c0, 5 52 and \reg0, \reg0, #MPIDR_CPUID_MASK /* get cpu id */ 53 mov \reg1, #\stackSize 54 mul \reg1, \reg1, \reg0 /* calculate current cpu stack offset */ 55 ldr \reg0, =\stackBottom 56 sub \reg0, \reg0, \reg1 /* calculate current cpu stack bottom */ 57 mov sp, \reg0 /* set sp */ 58 .endm 59 60 #ifdef __cplusplus 61 #if __cplusplus 62 } 63 #endif /* __cplusplus */ 64 #endif /* __cplusplus */ 65 66 #endif /* __ASM_H */ 67