1 #ifndef _LINUX_MMIOTRACE_H
2 #define _LINUX_MMIOTRACE_H
3
4 #include <linux/types.h>
5 #include <linux/list.h>
6
7 struct kmmio_probe;
8 struct pt_regs;
9
10 typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *,
11 struct pt_regs *, unsigned long addr);
12 typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
13 unsigned long condition, struct pt_regs *);
14
15 struct kmmio_probe {
16 /* kmmio internal list: */
17 struct list_head list;
18 /* start location of the probe point: */
19 unsigned long addr;
20 /* length of the probe region: */
21 unsigned long len;
22 /* Called before addr is executed: */
23 kmmio_pre_handler_t pre_handler;
24 /* Called after addr is executed: */
25 kmmio_post_handler_t post_handler;
26 void *private;
27 };
28
29 extern unsigned int kmmio_count;
30
31 extern int register_kmmio_probe(struct kmmio_probe *p);
32 extern void unregister_kmmio_probe(struct kmmio_probe *p);
33 extern int kmmio_init(void);
34 extern void kmmio_cleanup(void);
35
36 #ifdef CONFIG_MMIOTRACE
37 /* kmmio is active by some kmmio_probes? */
38 static inline int is_kmmio_active(void)
39 {
40 return kmmio_count;
41 }
42
43 /* Called from page fault handler. */
44 extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
45
46 /* Called from ioremap.c */
47 extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
48 void __iomem *addr);
49 extern void mmiotrace_iounmap(volatile void __iomem *addr);
50
51 /* For anyone to insert markers. Remember trailing newline. */
52 extern int mmiotrace_printk(const char *fmt, ...)
53 __attribute__ ((format (printf, 1, 2)));
54 #else /* !CONFIG_MMIOTRACE: */
55 static inline int is_kmmio_active(void)
56 {
57 return 0;
58 }
59
60 static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
61 {
62 return 0;
63 }
64
65 static inline void mmiotrace_ioremap(resource_size_t offset,
66 unsigned long size, void __iomem *addr)
67 {
68 }
69
70 static inline void mmiotrace_iounmap(volatile void __iomem *addr)
71 {
72 }
73
74 static inline int mmiotrace_printk(const char *fmt, ...)
75 __attribute__ ((format (printf, 1, 0)));
76
77 static inline int mmiotrace_printk(const char *fmt, ...)
78 {
79 return 0;
80 }
81 #endif /* CONFIG_MMIOTRACE */
82
83 enum mm_io_opcode {
84 MMIO_READ = 0x1, /* struct mmiotrace_rw */
85 MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
86 MMIO_PROBE = 0x3, /* struct mmiotrace_map */
87 MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
88 MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
89 };
90
91 struct mmiotrace_rw {
92 resource_size_t phys; /* PCI address of register */
93 unsigned long value;
94 unsigned long pc; /* optional program counter */
95 int map_id;
96 unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */
97 unsigned char width; /* size of register access in bytes */
98 };
99
100 struct mmiotrace_map {
101 resource_size_t phys; /* base address in PCI space */
102 unsigned long virt; /* base virtual address */
103 unsigned long len; /* mapping size */
104 int map_id;
105 unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */
106 };
107
108 /* in kernel/trace/trace_mmiotrace.c */
109 extern void enable_mmiotrace(void);
110 extern void disable_mmiotrace(void);
111 extern void mmio_trace_rw(struct mmiotrace_rw *rw);
112 extern void mmio_trace_mapping(struct mmiotrace_map *map);
113 extern int mmio_trace_printk(const char *fmt, va_list args);
114
115 #endif /* _LINUX_MMIOTRACE_H */
116
|
This page was automatically generated by the
LXR engine.
|