2 * PowerPC BookIII S hardware breakpoint definitions
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.
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.
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.
18 * Copyright 2010, IBM Corporation.
19 * Author: K.Prasad <prasad@linux.vnet.ibm.com>
23 #ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H
24 #define _PPC_BOOK3S_64_HW_BREAKPOINT_H
27 #ifdef CONFIG_HAVE_HW_BREAKPOINT
29 struct arch_hw_breakpoint {
30 unsigned long address;
32 u8 len; /* length of the target data symbol */
33 bool extraneous_interrupt;
36 #include <linux/kdebug.h>
38 #include <asm/debug.h>
42 struct perf_sample_data;
44 #define HW_BREAKPOINT_ALIGN 0x7
45 /* Maximum permissible length of any HW Breakpoint */
46 #define HW_BREAKPOINT_LEN 0x8
48 extern int hw_breakpoint_slots(int type);
49 extern int arch_bp_generic_fields(int type, int *gen_bp_type);
50 extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
51 extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
52 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
53 unsigned long val, void *data);
54 int arch_install_hw_breakpoint(struct perf_event *bp);
55 void arch_uninstall_hw_breakpoint(struct perf_event *bp);
56 void hw_breakpoint_pmu_read(struct perf_event *bp);
57 extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
59 extern struct pmu perf_ops_bp;
60 extern void ptrace_triggered(struct perf_event *bp,
61 struct perf_sample_data *data, struct pt_regs *regs);
62 static inline void hw_breakpoint_disable(void)
66 extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
68 #else /* CONFIG_HAVE_HW_BREAKPOINT */
69 static inline void hw_breakpoint_disable(void) { }
70 static 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 */