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