[linux-2.6-block.git] / arch / powerpc / include / asm / hw_breakpoint.h

/*
 * PowerPC BookIII S hardware breakpoint definitions
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Copyright 2010, IBM Corporation.
 * Author: K.Prasad <prasad@linux.vnet.ibm.com>
 *
 */

#ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H
#define _PPC_BOOK3S_64_HW_BREAKPOINT_H

#ifdef	__KERNEL__
struct arch_hw_breakpoint {
	unsigned long	address;
	u16		type;
	u16		len; /* length of the target data symbol */
};

/* Note: Don't change the the first 6 bits below as they are in the same order
 * as the dabr and dabrx.
 */
#define HW_BRK_TYPE_READ		0x01
#define HW_BRK_TYPE_WRITE		0x02
#define HW_BRK_TYPE_TRANSLATE		0x04
#define HW_BRK_TYPE_USER		0x08
#define HW_BRK_TYPE_KERNEL		0x10
#define HW_BRK_TYPE_HYP			0x20
#define HW_BRK_TYPE_EXTRANEOUS_IRQ	0x80

/* bits that overlap with the bottom 3 bits of the dabr */
#define HW_BRK_TYPE_RDWR	(HW_BRK_TYPE_READ | HW_BRK_TYPE_WRITE)
#define HW_BRK_TYPE_DABR	(HW_BRK_TYPE_RDWR | HW_BRK_TYPE_TRANSLATE)
#define HW_BRK_TYPE_PRIV_ALL	(HW_BRK_TYPE_USER | HW_BRK_TYPE_KERNEL | \
				 HW_BRK_TYPE_HYP)

#ifdef CONFIG_HAVE_HW_BREAKPOINT
#include <linux/kdebug.h>
#include <asm/reg.h>
#include <asm/debug.h>

struct perf_event_attr;
struct perf_event;
struct pmu;
struct perf_sample_data;
struct task_struct;

#define HW_BREAKPOINT_ALIGN 0x7

extern int hw_breakpoint_slots(int type);
extern int arch_bp_generic_fields(int type, int *gen_bp_type);
extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
extern int hw_breakpoint_arch_parse(struct perf_event *bp,
				    const struct perf_event_attr *attr,
				    struct arch_hw_breakpoint *hw);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
						unsigned long val, void *data);
int arch_install_hw_breakpoint(struct perf_event *bp);
void arch_uninstall_hw_breakpoint(struct perf_event *bp);
void arch_unregister_hw_breakpoint(struct perf_event *bp);
void hw_breakpoint_pmu_read(struct perf_event *bp);
extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);

extern struct pmu perf_ops_bp;
extern void ptrace_triggered(struct perf_event *bp,
			struct perf_sample_data *data, struct pt_regs *regs);
static inline void hw_breakpoint_disable(void)
{
	struct arch_hw_breakpoint brk;

	brk.address = 0;
	brk.type = 0;
	brk.len = 0;
	if (ppc_breakpoint_available())
		__set_breakpoint(&brk);
}
extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
int hw_breakpoint_handler(struct die_args *args);

#else	/* CONFIG_HAVE_HW_BREAKPOINT */
static inline void hw_breakpoint_disable(void) { }
static inline void thread_change_pc(struct task_struct *tsk,
					struct pt_regs *regs) { }
#endif	/* CONFIG_HAVE_HW_BREAKPOINT */
#endif	/* __KERNEL__ */
#endif	/* _PPC_BOOK3S_64_HW_BREAKPOINT_H */
Commit	Line	Data
5aae8a53 P	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__
5aae8a53	27	struct arch_hw_breakpoint {
5aae8a53	28	unsigned long address;
9422de3e MN	29	u16 type;
9422de3e MN	30	u16 len; /* length of the target data symbol */
5aae8a53 P	31	};
5aae8a53 P	32
9422de3e MN	33	/* Note: Don't change the the first 6 bits below as they are in the same order
	34	* as the dabr and dabrx.
	35	*/
	36	#define HW_BRK_TYPE_READ 0x01
	37	#define HW_BRK_TYPE_WRITE 0x02
	38	#define HW_BRK_TYPE_TRANSLATE 0x04
	39	#define HW_BRK_TYPE_USER 0x08
	40	#define HW_BRK_TYPE_KERNEL 0x10
	41	#define HW_BRK_TYPE_HYP 0x20
	42	#define HW_BRK_TYPE_EXTRANEOUS_IRQ 0x80
	43
	44	/* bits that overlap with the bottom 3 bits of the dabr */
	45	#define HW_BRK_TYPE_RDWR (HW_BRK_TYPE_READ \| HW_BRK_TYPE_WRITE)
	46	#define HW_BRK_TYPE_DABR (HW_BRK_TYPE_RDWR \| HW_BRK_TYPE_TRANSLATE)
	47	#define HW_BRK_TYPE_PRIV_ALL (HW_BRK_TYPE_USER \| HW_BRK_TYPE_KERNEL \| \
	48	HW_BRK_TYPE_HYP)
	49
	50	#ifdef CONFIG_HAVE_HW_BREAKPOINT
5aae8a53 P	51	#include <linux/kdebug.h>
5aae8a53 P	52	#include <asm/reg.h>
ae3a197e	53	#include <asm/debug.h>
5aae8a53	54
5d5176ba	55	struct perf_event_attr;
5aae8a53 P	56	struct perf_event;
	57	struct pmu;
	58	struct perf_sample_data;
62b84265	59	struct task_struct;
5aae8a53 P	60
5aae8a53 P	61	#define HW_BREAKPOINT_ALIGN 0x7
5aae8a53	62
d09ec738	63	extern int hw_breakpoint_slots(int type);
5aae8a53	64	extern int arch_bp_generic_fields(int type, int *gen_bp_type);
8e983ff9	65	extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
5d5176ba FW	66	extern int hw_breakpoint_arch_parse(struct perf_event *bp,
	67	const struct perf_event_attr *attr,
	68	struct arch_hw_breakpoint *hw);
5aae8a53 P	69	extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
	70	unsigned long val, void *data);
	71	int arch_install_hw_breakpoint(struct perf_event *bp);
	72	void arch_uninstall_hw_breakpoint(struct perf_event *bp);
b0d876da	73	void arch_unregister_hw_breakpoint(struct perf_event *bp);
5aae8a53 P	74	void hw_breakpoint_pmu_read(struct perf_event *bp);
	75	extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
	76
	77	extern struct pmu perf_ops_bp;
29dfc4fd	78	extern void ptrace_triggered(struct perf_event *bp,
5aae8a53 P	79	struct perf_sample_data data, struct pt_regs regs);
	80	static inline void hw_breakpoint_disable(void)
	81	{
9422de3e MN	82	struct arch_hw_breakpoint brk;
	83
	84	brk.address = 0;
	85	brk.type = 0;
	86	brk.len = 0;
5d6a03eb NR	87	if (ppc_breakpoint_available())
5d6a03eb NR	88	__set_breakpoint(&brk);
5aae8a53	89	}
06532a67	90	extern void thread_change_pc(struct task_struct tsk, struct pt_regs regs);
b0d876da	91	int hw_breakpoint_handler(struct die_args *args);
5aae8a53 P	92
	93	#else /* CONFIG_HAVE_HW_BREAKPOINT */
	94	static inline void hw_breakpoint_disable(void) { }
06532a67 P	95	static inline void thread_change_pc(struct task_struct *tsk,
06532a67 P	96	struct pt_regs *regs) { }
5aae8a53 P	97	#endif /* CONFIG_HAVE_HW_BREAKPOINT */
	98	#endif /* __KERNEL__ */
	99	#endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */