1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Author: Chong Qiao <qiaochong@loongson.cn> 4 * Huacai Chen <chenhuacai@loongson.cn> 5 * 6 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 7 */ 8 #ifndef _ASM_WATCH_H 9 #define _ASM_WATCH_H 10 11 #include <linux/bitops.h> 12 13 #include <asm/loongarchregs.h> 14 15 unsigned long watch_csrrd(unsigned int reg); 16 void watch_csrwr(unsigned long val, unsigned int reg); 17 18 void loongarch_probe_watch_registers(struct cpuinfo_loongarch *c); 19 void loongarch_clear_watch_registers(void); 20 void loongarch_install_watch_registers(struct task_struct *t); 21 void loongarch_clear_prev_watch_registers(struct task_struct *prev); 22 void loongarch_install_next_watch_registers(struct task_struct *next); 23 void loongarch_read_watch_registers(struct pt_regs *regs); 24 void loongarch_update_watch_registers(struct task_struct *t); 25 26 #ifdef CONFIG_HARDWARE_WATCHPOINTS 27 #define __process_watch(prev, next) do { \ 28 if (test_bit(TIF_LOAD_WATCH, &task_thread_info(prev)->flags) \ 29 || test_bit(TIF_SINGLESTEP, &task_thread_info(prev)->flags)) \ 30 loongarch_clear_prev_watch_registers(prev); \ 31 if (test_bit(TIF_LOAD_WATCH, &task_thread_info(prev)->flags) \ 32 || test_bit(TIF_SINGLESTEP, &task_thread_info(prev)->flags)) \ 33 loongarch_install_next_watch_registers(next); \ 34 } while (0) 35 #else 36 #define __process_watch(prev, next) do {} while (0) 37 #endif 38 39 #endif /* _ASM_WATCH_H */ 40