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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 struct arch_hw_breakpoint
{
28 unsigned long address
;
30 u16 len
; /* length of the target data symbol */
33 /* Note: Don't change the the first 6 bits below as they are in the same order
34 * as the dabr and dabrx.
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
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 | \
50 #ifdef CONFIG_HAVE_HW_BREAKPOINT
51 #include <linux/kdebug.h>
53 #include <asm/debug.h>
55 struct perf_event_attr
;
58 struct perf_sample_data
;
61 #define HW_BREAKPOINT_ALIGN 0x7
63 extern int hw_breakpoint_slots(int type
);
64 extern int arch_bp_generic_fields(int type
, int *gen_bp_type
);
65 extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint
*hw
);
66 extern int hw_breakpoint_arch_parse(struct perf_event
*bp
,
67 const struct perf_event_attr
*attr
,
68 struct arch_hw_breakpoint
*hw
);
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
);
73 void arch_unregister_hw_breakpoint(struct perf_event
*bp
);
74 void hw_breakpoint_pmu_read(struct perf_event
*bp
);
75 extern void flush_ptrace_hw_breakpoint(struct task_struct
*tsk
);
77 extern struct pmu perf_ops_bp
;
78 extern void ptrace_triggered(struct perf_event
*bp
,
79 struct perf_sample_data
*data
, struct pt_regs
*regs
);
80 static inline void hw_breakpoint_disable(void)
82 struct arch_hw_breakpoint brk
;
87 if (ppc_breakpoint_available())
88 __set_breakpoint(&brk
);
90 extern void thread_change_pc(struct task_struct
*tsk
, struct pt_regs
*regs
);
91 int hw_breakpoint_handler(struct die_args
*args
);
93 #else /* CONFIG_HAVE_HW_BREAKPOINT */
94 static inline void hw_breakpoint_disable(void) { }
95 static inline void thread_change_pc(struct task_struct
*tsk
,
96 struct pt_regs
*regs
) { }
97 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
98 #endif /* __KERNEL__ */
99 #endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */