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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__
27struct arch_hw_breakpoint {
28 unsigned long address;
29 u16 type;
30 u16 len; /* length of the target data symbol */
31};
32
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
51#include <linux/kdebug.h>
52#include <asm/reg.h>
53#include <asm/debug.h>
54
55struct perf_event;
56struct pmu;
57struct perf_sample_data;
58
59#define HW_BREAKPOINT_ALIGN 0x7
60
61extern int hw_breakpoint_slots(int type);
62extern int arch_bp_generic_fields(int type, int *gen_bp_type);
63extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
64extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
65extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
66 unsigned long val, void *data);
67int arch_install_hw_breakpoint(struct perf_event *bp);
68void arch_uninstall_hw_breakpoint(struct perf_event *bp);
69void hw_breakpoint_pmu_read(struct perf_event *bp);
70extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
71
72extern struct pmu perf_ops_bp;
73extern void ptrace_triggered(struct perf_event *bp,
74 struct perf_sample_data *data, struct pt_regs *regs);
75static inline void hw_breakpoint_disable(void)
76{
77 struct arch_hw_breakpoint brk;
78
79 brk.address = 0;
80 brk.type = 0;
81 brk.len = 0;
82 __set_breakpoint(&brk);
83}
84extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
85
86#else /* CONFIG_HAVE_HW_BREAKPOINT */
87static inline void hw_breakpoint_disable(void) { }
88static inline void thread_change_pc(struct task_struct *tsk,
89 struct pt_regs *regs) { }
90#endif /* CONFIG_HAVE_HW_BREAKPOINT */
91#endif /* __KERNEL__ */
92#endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */
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,
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 */