1 /* 2 * Xtensa hardware breakpoints/watchpoints handling functions 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 2016 Cadence Design Systems Inc. 9 */ 10 11 #ifndef __ASM_XTENSA_HW_BREAKPOINT_H 12 #define __ASM_XTENSA_HW_BREAKPOINT_H 13 14 #ifdef CONFIG_HAVE_HW_BREAKPOINT 15 16 #include <linux/kdebug.h> 17 #include <linux/types.h> 18 #include <uapi/linux/hw_breakpoint.h> 19 20 /* Breakpoint */ 21 #define XTENSA_BREAKPOINT_EXECUTE 0 22 23 /* Watchpoints */ 24 #define XTENSA_BREAKPOINT_LOAD 1 25 #define XTENSA_BREAKPOINT_STORE 2 26 27 struct arch_hw_breakpoint { 28 unsigned long address; 29 u16 len; 30 u16 type; 31 }; 32 33 struct perf_event_attr; 34 struct perf_event; 35 struct pt_regs; 36 struct task_struct; 37 38 int hw_breakpoint_slots(int type); 39 int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw); 40 int hw_breakpoint_arch_parse(struct perf_event *bp, 41 const struct perf_event_attr *attr, 42 struct arch_hw_breakpoint *hw); 43 int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 44 unsigned long val, void *data); 45 46 int arch_install_hw_breakpoint(struct perf_event *bp); 47 void arch_uninstall_hw_breakpoint(struct perf_event *bp); 48 void hw_breakpoint_pmu_read(struct perf_event *bp); 49 int check_hw_breakpoint(struct pt_regs *regs); 50 void clear_ptrace_hw_breakpoint(struct task_struct *tsk); 51 52 #else 53 54 struct task_struct; 55 56 static inline void clear_ptrace_hw_breakpoint(struct task_struct *tsk) 57 { 58 } 59 60 #endif /* CONFIG_HAVE_HW_BREAKPOINT */ 61 #endif /* __ASM_XTENSA_HW_BREAKPOINT_H */ 62