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#ifndef MMIOTRACE_H
#define MMIOTRACE_H
#include <asm/types.h>
#ifdef __KERNEL__
#include <linux/list.h>
struct kmmio_probe;
struct pt_regs;
typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *,
struct pt_regs *, unsigned long addr);
typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
unsigned long condition, struct pt_regs *);
struct kmmio_probe {
struct list_head list;
unsigned long addr; /* start location of the probe point */
unsigned long len; /* length of the probe region */
kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */
kmmio_post_handler_t post_handler; /* Called after addr is executed */
};
/* kmmio is active by some kmmio_probes? */
static inline int is_kmmio_active(void)
{
extern unsigned int kmmio_count;
return kmmio_count;
}
extern void reference_kmmio(void);
extern void unreference_kmmio(void);
extern int register_kmmio_probe(struct kmmio_probe *p);
extern void unregister_kmmio_probe(struct kmmio_probe *p);
/* Called from page fault handler. */
extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
#endif /* __KERNEL__ */
/*
* If you change anything here, you must bump MMIO_VERSION.
* This is the relay data format for user space.
*/
#define MMIO_VERSION 0x04
/* mm_io_header.type */
#define MMIO_OPCODE_MASK 0xff
#define MMIO_OPCODE_SHIFT 0
#define MMIO_WIDTH_MASK 0xff00
#define MMIO_WIDTH_SHIFT 8
#define MMIO_MAGIC (0x6f000000 | (MMIO_VERSION<<16))
#define MMIO_MAGIC_MASK 0xffff0000
enum mm_io_opcode { /* payload type: */
MMIO_READ = 0x1, /* struct mm_io_rw */
MMIO_WRITE = 0x2, /* struct mm_io_rw */
MMIO_PROBE = 0x3, /* struct mm_io_map */
MMIO_UNPROBE = 0x4, /* struct mm_io_map */
MMIO_MARKER = 0x5, /* raw char data */
MMIO_UNKNOWN_OP = 0x6, /* struct mm_io_rw */
};
struct mm_io_header {
__u32 type; /* see MMIO_* macros above */
__u32 sec; /* timestamp */
__u32 nsec;
__u32 pid; /* PID of the process, or 0 for kernel core */
__u16 data_len; /* length of the following payload */
};
struct mm_io_rw {
__u64 address; /* virtual address of register */
__u64 value;
__u64 pc; /* optional program counter */
};
struct mm_io_map {
__u64 phys; /* base address in PCI space */
__u64 addr; /* base virtual address */
__u64 len; /* mapping size */
__u64 pc; /* optional program counter */
};
/*
* These structures are used to allow a single relay_write()
* call to write a full packet.
*/
struct mm_io_header_rw {
struct mm_io_header header;
struct mm_io_rw rw;
} __attribute__((packed));
struct mm_io_header_map {
struct mm_io_header header;
struct mm_io_map map;
} __attribute__((packed));
#endif /* MMIOTRACE_H */
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