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;
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 */
26 /* kmmio is active by some kmmio_probes? */
27 static inline int is_kmmio_active(void)
29 extern unsigned int kmmio_count;
33 extern void reference_kmmio(void);
34 extern void unreference_kmmio(void);
35 extern int register_kmmio_probe(struct kmmio_probe *p);
36 extern void unregister_kmmio_probe(struct kmmio_probe *p);
38 /* Called from page fault handler. */
39 extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
41 #endif /* __KERNEL__ */
45 * If you change anything here, you must bump MMIO_VERSION.
46 * This is the relay data format for user space.
48 #define MMIO_VERSION 0x04
50 /* mm_io_header.type */
51 #define MMIO_OPCODE_MASK 0xff
52 #define MMIO_OPCODE_SHIFT 0
53 #define MMIO_WIDTH_MASK 0xff00
54 #define MMIO_WIDTH_SHIFT 8
55 #define MMIO_MAGIC (0x6f000000 | (MMIO_VERSION<<16))
56 #define MMIO_MAGIC_MASK 0xffff0000
58 enum mm_io_opcode { /* payload type: */
59 MMIO_READ = 0x1, /* struct mm_io_rw */
60 MMIO_WRITE = 0x2, /* struct mm_io_rw */
61 MMIO_PROBE = 0x3, /* struct mm_io_map */
62 MMIO_UNPROBE = 0x4, /* struct mm_io_map */
63 MMIO_MARKER = 0x5, /* raw char data */
64 MMIO_UNKNOWN_OP = 0x6, /* struct mm_io_rw */
68 __u32 type; /* see MMIO_* macros above */
69 __u32 sec; /* timestamp */
71 __u32 pid; /* PID of the process, or 0 for kernel core */
72 __u16 data_len; /* length of the following payload */
76 __u64 address; /* virtual address of register */
78 __u64 pc; /* optional program counter */
82 __u64 phys; /* base address in PCI space */
83 __u64 addr; /* base virtual address */
84 __u64 len; /* mapping size */
85 __u64 pc; /* optional program counter */
90 * These structures are used to allow a single relay_write()
91 * call to write a full packet.
94 struct mm_io_header_rw {
95 struct mm_io_header header;
97 } __attribute__((packed));
99 struct mm_io_header_map {
100 struct mm_io_header header;
101 struct mm_io_map map;
102 } __attribute__((packed));
104 #endif /* MMIOTRACE_H */