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/arch/powerpc/include/asm/hw_breakpoint.h

https://github.com/aicjofs/android_kernel_lge_v500_20d
C Header | 74 lines | 43 code | 9 blank | 22 comment | 0 complexity | 3f029b2e0a9d6c254b03470927a10c81 MD5 | raw file
 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/debug.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,
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 */