1 /* 2 * Copyright (c) 2023 Institute of Parallel And Distributed Systems (IPADS), Shanghai Jiao Tong University (SJTU) 3 * Licensed under the Mulan PSL v2. 4 * You can use this software according to the terms and conditions of the Mulan PSL v2. 5 * You may obtain a copy of Mulan PSL v2 at: 6 * http://license.coscl.org.cn/MulanPSL2 7 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR 8 * IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR 9 * PURPOSE. 10 * See the Mulan PSL v2 for more details. 11 */ 12 13 #ifndef CHCORE_DEBUG_LOCK 14 #define CHCORE_DEBUG_LOCK 15 chcore_spin_lock(volatile int * lk)16static inline void chcore_spin_lock(volatile int *lk) 17 { 18 for (;;) { 19 if (!__atomic_test_and_set(lk, __ATOMIC_ACQUIRE)) 20 break; 21 while (*lk) 22 __asm__ __volatile__("nop" ::: "memory"); 23 24 // __asm__ __volatile__("wfe" ::: "memory"); 25 } 26 } 27 chcore_spin_unlock(volatile int * lk)28static inline void chcore_spin_unlock(volatile int *lk) 29 { 30 __asm__ __volatile__("dmb ish" ::: "memory"); 31 *lk = 0; 32 33 // __asm__ __volatile__("sev" ::: "memory"); 34 } 35 36 #endif 37