1#ifndef _LINUX_MMIOTRACE_H
2#define _LINUX_MMIOTRACE_H
3
4#include <linux/types.h>
5#include <linux/list.h>
6
7struct kmmio_probe;
8struct pt_regs;
9
10typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *,
11 struct pt_regs *, unsigned long addr);
12typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
13 unsigned long condition, struct pt_regs *);
14
15struct kmmio_probe {
16
17 struct list_head list;
18
19 unsigned long addr;
20
21 unsigned long len;
22
23 kmmio_pre_handler_t pre_handler;
24
25 kmmio_post_handler_t post_handler;
26 void *private;
27};
28
29extern unsigned int kmmio_count;
30
31extern int register_kmmio_probe(struct kmmio_probe *p);
32extern void unregister_kmmio_probe(struct kmmio_probe *p);
33extern int kmmio_init(void);
34extern void kmmio_cleanup(void);
35
36#ifdef CONFIG_MMIOTRACE
37
38static inline int is_kmmio_active(void)
39{
40 return kmmio_count;
41}
42
43
44extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
45
46
47extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
48 void __iomem *addr);
49extern void mmiotrace_iounmap(volatile void __iomem *addr);
50
51
52extern int mmiotrace_printk(const char *fmt, ...)
53 __attribute__ ((format (printf, 1, 2)));
54#else
55static inline int is_kmmio_active(void)
56{
57 return 0;
58}
59
60static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
61{
62 return 0;
63}
64
65static inline void mmiotrace_ioremap(resource_size_t offset,
66 unsigned long size, void __iomem *addr)
67{
68}
69
70static inline void mmiotrace_iounmap(volatile void __iomem *addr)
71{
72}
73
74static inline int mmiotrace_printk(const char *fmt, ...)
75 __attribute__ ((format (printf, 1, 0)));
76
77static inline int mmiotrace_printk(const char *fmt, ...)
78{
79 return 0;
80}
81#endif
82
83enum mm_io_opcode {
84 MMIO_READ = 0x1,
85 MMIO_WRITE = 0x2,
86 MMIO_PROBE = 0x3,
87 MMIO_UNPROBE = 0x4,
88 MMIO_UNKNOWN_OP = 0x5,
89};
90
91struct mmiotrace_rw {
92 resource_size_t phys;
93 unsigned long value;
94 unsigned long pc;
95 int map_id;
96 unsigned char opcode;
97 unsigned char width;
98};
99
100struct mmiotrace_map {
101 resource_size_t phys;
102 unsigned long virt;
103 unsigned long len;
104 int map_id;
105 unsigned char opcode;
106};
107
108
109extern void enable_mmiotrace(void);
110extern void disable_mmiotrace(void);
111extern void mmio_trace_rw(struct mmiotrace_rw *rw);
112extern void mmio_trace_mapping(struct mmiotrace_map *map);
113extern int mmio_trace_printk(const char *fmt, va_list args);
114
115#endif
116