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 29struct arch_hw_breakpoint { 30 bool extraneous_interrupt; 31 u8 len; /* length of the target data symbol */ 32 int type; 33 unsigned long address; 34}; 35 36#include <linux/kdebug.h> 37#include <asm/reg.h> 38#include <asm/system.h> 39 40struct perf_event; 41struct pmu; 42struct perf_sample_data; 43 44#define HW_BREAKPOINT_ALIGN 0x7 45/* Maximum permissible length of any HW Breakpoint */ 46#define HW_BREAKPOINT_LEN 0x8 47 48extern int hw_breakpoint_slots(int type); 49extern int arch_bp_generic_fields(int type, int *gen_bp_type); 50extern int arch_check_bp_in_kernelspace(struct perf_event *bp); 51extern int arch_validate_hwbkpt_settings(struct perf_event *bp); 52extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 53 unsigned long val, void *data); 54int arch_install_hw_breakpoint(struct perf_event *bp); 55void arch_uninstall_hw_breakpoint(struct perf_event *bp); 56void hw_breakpoint_pmu_read(struct perf_event *bp); 57extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); 58 59extern struct pmu perf_ops_bp; 60extern void ptrace_triggered(struct perf_event *bp, int nmi, 61 struct perf_sample_data *data, struct pt_regs *regs); 62static inline void hw_breakpoint_disable(void) 63{ 64 set_dabr(0); 65} 66extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs); 67 68#else /* CONFIG_HAVE_HW_BREAKPOINT */ 69static inline void hw_breakpoint_disable(void) { } 70static inline void thread_change_pc(struct task_struct *tsk, 71 struct pt_regs *regs) { } 72#endif /* CONFIG_HAVE_HW_BREAKPOINT */ 73#endif /* __KERNEL__ */ 74#endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */ 75