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8b7d89d0 PP |
1 | #ifndef MMIOTRACE_H |
2 | #define MMIOTRACE_H | |
3 | ||
970e6fa0 | 4 | #include <linux/types.h> |
0fd0e3da PP |
5 | |
6 | #include <linux/list.h> | |
7 | ||
8 | struct kmmio_probe; | |
9 | struct pt_regs; | |
10 | ||
11 | typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *, | |
12 | struct pt_regs *, unsigned long addr); | |
13 | typedef void (*kmmio_post_handler_t)(struct kmmio_probe *, | |
14 | unsigned long condition, struct pt_regs *); | |
15 | ||
16 | struct kmmio_probe { | |
d61fc448 | 17 | struct list_head list; /* kmmio internal list */ |
0fd0e3da PP |
18 | unsigned long addr; /* start location of the probe point */ |
19 | unsigned long len; /* length of the probe region */ | |
20 | kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */ | |
21 | kmmio_post_handler_t post_handler; /* Called after addr is executed */ | |
d61fc448 | 22 | void *user_data; |
0fd0e3da PP |
23 | }; |
24 | ||
25 | /* kmmio is active by some kmmio_probes? */ | |
26 | static inline int is_kmmio_active(void) | |
27 | { | |
28 | extern unsigned int kmmio_count; | |
29 | return kmmio_count; | |
30 | } | |
31 | ||
0fd0e3da PP |
32 | extern int register_kmmio_probe(struct kmmio_probe *p); |
33 | extern void unregister_kmmio_probe(struct kmmio_probe *p); | |
34 | ||
35 | /* Called from page fault handler. */ | |
36 | extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); | |
37 | ||
d61fc448 PP |
38 | /* Called from ioremap.c */ |
39 | #ifdef CONFIG_MMIOTRACE | |
40 | extern void | |
41 | mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr); | |
42 | extern void mmiotrace_iounmap(volatile void __iomem *addr); | |
43 | #else | |
44 | static inline void | |
45 | mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr) | |
46 | { | |
47 | } | |
48 | static inline void mmiotrace_iounmap(volatile void __iomem *addr) | |
49 | { | |
50 | } | |
51 | #endif /* CONFIG_MMIOTRACE_HOOKS */ | |
52 | ||
bd8ac686 PP |
53 | enum mm_io_opcode { |
54 | MMIO_READ = 0x1, /* struct mmiotrace_rw */ | |
55 | MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ | |
56 | MMIO_PROBE = 0x3, /* struct mmiotrace_map */ | |
57 | MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ | |
8b7d89d0 | 58 | MMIO_MARKER = 0x5, /* raw char data */ |
bd8ac686 | 59 | MMIO_UNKNOWN_OP = 0x6, /* struct mmiotrace_rw */ |
8b7d89d0 PP |
60 | }; |
61 | ||
bd8ac686 PP |
62 | struct mmiotrace_rw { |
63 | unsigned long phys; /* PCI address of register */ | |
64 | unsigned long value; | |
65 | unsigned long pc; /* optional program counter */ | |
66 | int map_id; | |
67 | unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ | |
68 | unsigned char width; /* size of register access in bytes */ | |
8b7d89d0 PP |
69 | }; |
70 | ||
bd8ac686 PP |
71 | struct mmiotrace_map { |
72 | unsigned long phys; /* base address in PCI space */ | |
73 | unsigned long virt; /* base virtual address */ | |
74 | unsigned long len; /* mapping size */ | |
75 | int map_id; | |
76 | unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ | |
8b7d89d0 PP |
77 | }; |
78 | ||
bd8ac686 PP |
79 | /* in kernel/trace/trace_mmiotrace.c */ |
80 | extern void enable_mmiotrace(void); | |
81 | extern void disable_mmiotrace(void); | |
82 | extern void mmio_trace_rw(struct mmiotrace_rw *rw); | |
83 | extern void mmio_trace_mapping(struct mmiotrace_map *map); | |
8b7d89d0 | 84 | |
8b7d89d0 | 85 | #endif /* MMIOTRACE_H */ |