regulator: Add support for RICOH PMIC RC5T583 regulator
[linux-2.6.git] / include / linux / hw_breakpoint.h
1 #ifndef _LINUX_HW_BREAKPOINT_H
2 #define _LINUX_HW_BREAKPOINT_H
3
4 enum {
5         HW_BREAKPOINT_LEN_1 = 1,
6         HW_BREAKPOINT_LEN_2 = 2,
7         HW_BREAKPOINT_LEN_4 = 4,
8         HW_BREAKPOINT_LEN_8 = 8,
9 };
10
11 enum {
12         HW_BREAKPOINT_EMPTY     = 0,
13         HW_BREAKPOINT_R         = 1,
14         HW_BREAKPOINT_W         = 2,
15         HW_BREAKPOINT_RW        = HW_BREAKPOINT_R | HW_BREAKPOINT_W,
16         HW_BREAKPOINT_X         = 4,
17         HW_BREAKPOINT_INVALID   = HW_BREAKPOINT_RW | HW_BREAKPOINT_X,
18 };
19
20 enum bp_type_idx {
21         TYPE_INST       = 0,
22 #ifdef CONFIG_HAVE_MIXED_BREAKPOINTS_REGS
23         TYPE_DATA       = 0,
24 #else
25         TYPE_DATA       = 1,
26 #endif
27         TYPE_MAX
28 };
29
30 #ifdef __KERNEL__
31
32 #include <linux/perf_event.h>
33
34 #ifdef CONFIG_HAVE_HW_BREAKPOINT
35
36 extern int __init init_hw_breakpoint(void);
37
38 static inline void hw_breakpoint_init(struct perf_event_attr *attr)
39 {
40         memset(attr, 0, sizeof(*attr));
41
42         attr->type = PERF_TYPE_BREAKPOINT;
43         attr->size = sizeof(*attr);
44         /*
45          * As it's for in-kernel or ptrace use, we want it to be pinned
46          * and to call its callback every hits.
47          */
48         attr->pinned = 1;
49         attr->sample_period = 1;
50 }
51
52 static inline void ptrace_breakpoint_init(struct perf_event_attr *attr)
53 {
54         hw_breakpoint_init(attr);
55         attr->exclude_kernel = 1;
56 }
57
58 static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
59 {
60         return bp->attr.bp_addr;
61 }
62
63 static inline int hw_breakpoint_type(struct perf_event *bp)
64 {
65         return bp->attr.bp_type;
66 }
67
68 static inline unsigned long hw_breakpoint_len(struct perf_event *bp)
69 {
70         return bp->attr.bp_len;
71 }
72
73 extern struct perf_event *
74 register_user_hw_breakpoint(struct perf_event_attr *attr,
75                             perf_overflow_handler_t triggered,
76                             void *context,
77                             struct task_struct *tsk);
78
79 /* FIXME: only change from the attr, and don't unregister */
80 extern int
81 modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr);
82
83 /*
84  * Kernel breakpoints are not associated with any particular thread.
85  */
86 extern struct perf_event *
87 register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
88                                 perf_overflow_handler_t triggered,
89                                 void *context,
90                                 int cpu);
91
92 extern struct perf_event * __percpu *
93 register_wide_hw_breakpoint(struct perf_event_attr *attr,
94                             perf_overflow_handler_t triggered,
95                             void *context);
96
97 extern int register_perf_hw_breakpoint(struct perf_event *bp);
98 extern int __register_perf_hw_breakpoint(struct perf_event *bp);
99 extern void unregister_hw_breakpoint(struct perf_event *bp);
100 extern void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events);
101
102 extern int dbg_reserve_bp_slot(struct perf_event *bp);
103 extern int dbg_release_bp_slot(struct perf_event *bp);
104 extern int reserve_bp_slot(struct perf_event *bp);
105 extern void release_bp_slot(struct perf_event *bp);
106
107 extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
108
109 static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
110 {
111         return &bp->hw.info;
112 }
113
114 #else /* !CONFIG_HAVE_HW_BREAKPOINT */
115
116 static inline int __init init_hw_breakpoint(void) { return 0; }
117
118 static inline struct perf_event *
119 register_user_hw_breakpoint(struct perf_event_attr *attr,
120                             perf_overflow_handler_t triggered,
121                             void *context,
122                             struct task_struct *tsk)    { return NULL; }
123 static inline int
124 modify_user_hw_breakpoint(struct perf_event *bp,
125                           struct perf_event_attr *attr) { return -ENOSYS; }
126 static inline struct perf_event *
127 register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
128                                 perf_overflow_handler_t  triggered,
129                                 void *context,
130                                 int cpu)                { return NULL; }
131 static inline struct perf_event * __percpu *
132 register_wide_hw_breakpoint(struct perf_event_attr *attr,
133                             perf_overflow_handler_t triggered,
134                             void *context)              { return NULL; }
135 static inline int
136 register_perf_hw_breakpoint(struct perf_event *bp)      { return -ENOSYS; }
137 static inline int
138 __register_perf_hw_breakpoint(struct perf_event *bp)    { return -ENOSYS; }
139 static inline void unregister_hw_breakpoint(struct perf_event *bp)      { }
140 static inline void
141 unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events) { }
142 static inline int
143 reserve_bp_slot(struct perf_event *bp)                  {return -ENOSYS; }
144 static inline void release_bp_slot(struct perf_event *bp)               { }
145
146 static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk)  { }
147
148 static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
149 {
150         return NULL;
151 }
152
153 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
154 #endif /* __KERNEL__ */
155
156 #endif /* _LINUX_HW_BREAKPOINT_H */