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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; |
30 | u16 len; /* length of the target data symbol */ | |
5aae8a53 P |
31 | }; |
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> |
52 | #include <asm/reg.h> | |
ae3a197e | 53 | #include <asm/debug.h> |
5aae8a53 | 54 | |
5aae8a53 P |
55 | struct perf_event; |
56 | struct pmu; | |
57 | struct perf_sample_data; | |
58 | ||
59 | #define HW_BREAKPOINT_ALIGN 0x7 | |
5aae8a53 | 60 | |
d09ec738 | 61 | extern int hw_breakpoint_slots(int type); |
5aae8a53 P |
62 | extern int arch_bp_generic_fields(int type, int *gen_bp_type); |
63 | extern int arch_check_bp_in_kernelspace(struct perf_event *bp); | |
64 | extern int arch_validate_hwbkpt_settings(struct perf_event *bp); | |
65 | extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, | |
66 | unsigned long val, void *data); | |
67 | int arch_install_hw_breakpoint(struct perf_event *bp); | |
68 | void arch_uninstall_hw_breakpoint(struct perf_event *bp); | |
69 | void hw_breakpoint_pmu_read(struct perf_event *bp); | |
70 | extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); | |
71 | ||
72 | extern struct pmu perf_ops_bp; | |
29dfc4fd | 73 | extern void ptrace_triggered(struct perf_event *bp, |
5aae8a53 P |
74 | struct perf_sample_data *data, struct pt_regs *regs); |
75 | static inline void hw_breakpoint_disable(void) | |
76 | { | |
9422de3e MN |
77 | struct arch_hw_breakpoint brk; |
78 | ||
79 | brk.address = 0; | |
80 | brk.type = 0; | |
81 | brk.len = 0; | |
b9818c33 | 82 | set_breakpoint(&brk); |
5aae8a53 | 83 | } |
06532a67 | 84 | extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs); |
5aae8a53 P |
85 | |
86 | #else /* CONFIG_HAVE_HW_BREAKPOINT */ | |
87 | static inline void hw_breakpoint_disable(void) { } | |
06532a67 P |
88 | static inline void thread_change_pc(struct task_struct *tsk, |
89 | struct pt_regs *regs) { } | |
5aae8a53 P |
90 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
91 | #endif /* __KERNEL__ */ | |
92 | #endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */ |