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 __printf(1, 2) int mmiotrace_printk(const char *fmt, ...);
53#else
54static inline int is_kmmio_active(void)
55{
56 return 0;
57}
58
59static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr)
60{
61 return 0;
62}
63
64static inline void mmiotrace_ioremap(resource_size_t offset,
65 unsigned long size, void __iomem *addr)
66{
67}
68
69static inline void mmiotrace_iounmap(volatile void __iomem *addr)
70{
71}
72
73static inline __printf(1, 2) int mmiotrace_printk(const char *fmt, ...)
74{
75 return 0;
76}
77#endif
78
79enum mm_io_opcode {
80 MMIO_READ = 0x1,
81 MMIO_WRITE = 0x2,
82 MMIO_PROBE = 0x3,
83 MMIO_UNPROBE = 0x4,
84 MMIO_UNKNOWN_OP = 0x5,
85};
86
87struct mmiotrace_rw {
88 resource_size_t phys;
89 unsigned long value;
90 unsigned long pc;
91 int map_id;
92 unsigned char opcode;
93 unsigned char width;
94};
95
96struct mmiotrace_map {
97 resource_size_t phys;
98 unsigned long virt;
99 unsigned long len;
100 int map_id;
101 unsigned char opcode;
102};
103
104
105extern void enable_mmiotrace(void);
106extern void disable_mmiotrace(void);
107extern void mmio_trace_rw(struct mmiotrace_rw *rw);
108extern void mmio_trace_mapping(struct mmiotrace_map *map);
109extern int mmio_trace_printk(const char *fmt, va_list args);
110
111#endif
112