1 /* 2 * PowerPC BookIII S hardware breakpoint definitions 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 * 18 * Copyright 2010, IBM Corporation. 19 * Author: K.Prasad <prasad@linux.vnet.ibm.com> 20 * 21 */ 22 23 #ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H 24 #define _PPC_BOOK3S_64_HW_BREAKPOINT_H 25 26 #ifdef __KERNEL__ 27 #ifdef CONFIG_HAVE_HW_BREAKPOINT 28 29 struct arch_hw_breakpoint { 30 unsigned long address; 31 unsigned long dabrx; 32 int type; 33 u8 len; /* length of the target data symbol */ 34 bool extraneous_interrupt; 35 }; 36 37 #include <linux/kdebug.h> 38 #include <asm/reg.h> 39 #include <asm/debug.h> 40 41 struct perf_event; 42 struct pmu; 43 struct perf_sample_data; 44 45 #define HW_BREAKPOINT_ALIGN 0x7 46 /* Maximum permissible length of any HW Breakpoint */ 47 #define HW_BREAKPOINT_LEN 0x8 48 49 extern int hw_breakpoint_slots(int type); 50 extern int arch_bp_generic_fields(int type, int *gen_bp_type); 51 extern int arch_check_bp_in_kernelspace(struct perf_event *bp); 52 extern int arch_validate_hwbkpt_settings(struct perf_event *bp); 53 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 54 unsigned long val, void *data); 55 int arch_install_hw_breakpoint(struct perf_event *bp); 56 void arch_uninstall_hw_breakpoint(struct perf_event *bp); 57 void hw_breakpoint_pmu_read(struct perf_event *bp); 58 extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); 59 60 extern struct pmu perf_ops_bp; 61 extern void ptrace_triggered(struct perf_event *bp, 62 struct perf_sample_data *data, struct pt_regs *regs); 63 static inline void hw_breakpoint_disable(void) 64 { 65 set_dabr(0, 0); 66 } 67 extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs); 68 69 #else /* CONFIG_HAVE_HW_BREAKPOINT */ 70 static inline void hw_breakpoint_disable(void) { } 71 static inline void thread_change_pc(struct task_struct *tsk, 72 struct pt_regs *regs) { } 73 #endif /* CONFIG_HAVE_HW_BREAKPOINT */ 74 #endif /* __KERNEL__ */ 75 #endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */ 76