8 #include <linux/list.h>
13 typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *,
14 struct pt_regs *, unsigned long addr);
15 typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
16 unsigned long condition, struct pt_regs *);
19 struct list_head list; /* kmmio internal list */
20 unsigned long addr; /* start location of the probe point */
21 unsigned long len; /* length of the probe region */
22 kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */
23 kmmio_post_handler_t post_handler; /* Called after addr is executed */
27 /* kmmio is active by some kmmio_probes? */
28 static inline int is_kmmio_active(void)
30 extern unsigned int kmmio_count;
34 extern void reference_kmmio(void);
35 extern void unreference_kmmio(void);
36 extern int register_kmmio_probe(struct kmmio_probe *p);
37 extern void unregister_kmmio_probe(struct kmmio_probe *p);
39 /* Called from page fault handler. */
40 extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
42 /* Called from ioremap.c */
43 #ifdef CONFIG_MMIOTRACE
45 mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr);
46 extern void mmiotrace_iounmap(volatile void __iomem *addr);
49 mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr)
52 static inline void mmiotrace_iounmap(volatile void __iomem *addr)
55 #endif /* CONFIG_MMIOTRACE_HOOKS */
57 /* in kernel/trace/trace_mmiotrace.c */
58 extern int __init init_mmiotrace(void);
59 extern void enable_mmiotrace(void);
60 extern void disable_mmiotrace(void);
61 extern void mmio_trace_record(u32 type, unsigned long addr, unsigned long arg);
63 #endif /* __KERNEL__ */
67 * If you change anything here, you must bump MMIO_VERSION.
68 * This is the relay data format for user space.
70 #define MMIO_VERSION 0x04
72 /* mm_io_header.type */
73 #define MMIO_OPCODE_MASK 0xff
74 #define MMIO_OPCODE_SHIFT 0
75 #define MMIO_WIDTH_MASK 0xff00
76 #define MMIO_WIDTH_SHIFT 8
77 #define MMIO_MAGIC (0x6f000000 | (MMIO_VERSION<<16))
78 #define MMIO_MAGIC_MASK 0xffff0000
80 enum mm_io_opcode { /* payload type: */
81 MMIO_READ = 0x1, /* struct mm_io_rw */
82 MMIO_WRITE = 0x2, /* struct mm_io_rw */
83 MMIO_PROBE = 0x3, /* struct mm_io_map */
84 MMIO_UNPROBE = 0x4, /* struct mm_io_map */
85 MMIO_MARKER = 0x5, /* raw char data */
86 MMIO_UNKNOWN_OP = 0x6, /* struct mm_io_rw */
90 __u32 type; /* see MMIO_* macros above */
91 __u32 sec; /* timestamp */
93 __u32 pid; /* PID of the process, or 0 for kernel core */
94 __u16 data_len; /* length of the following payload */
98 __u64 address; /* virtual address of register */
100 __u64 pc; /* optional program counter */
104 __u64 phys; /* base address in PCI space */
105 __u64 addr; /* base virtual address */
106 __u64 len; /* mapping size */
107 __u64 pc; /* optional program counter */
112 * These structures are used to allow a single relay_write()
113 * call to write a full packet.
116 struct mm_io_header_rw {
117 struct mm_io_header header;
119 } __attribute__((packed));
121 struct mm_io_header_map {
122 struct mm_io_header header;
123 struct mm_io_map map;
124 } __attribute__((packed));
126 #endif /* MMIOTRACE_H */