105 строки
2.6 KiB
C
105 строки
2.6 KiB
C
#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 */
|