hw_breakpoint.h

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#ifndef __ASM_SH_HW_BREAKPOINT_H
#define __ASM_SH_HW_BREAKPOINT_H

#include <uapi/asm/hw_breakpoint.h>

#define __ARCH_HW_BREAKPOINT_H

#include <linux/kdebug.h>
#include <linux/types.h>

struct arch_hw_breakpoint {
    char        *name; /* Contains name of the symbol to set bkpt */
    unsigned long   address;
    u16     len;
    u16     type;
};

enum {
    SH_BREAKPOINT_READ  = (1 << 1),
    SH_BREAKPOINT_WRITE = (1 << 2),
    SH_BREAKPOINT_RW    = SH_BREAKPOINT_READ | SH_BREAKPOINT_WRITE,

    SH_BREAKPOINT_LEN_1 = (1 << 12),
    SH_BREAKPOINT_LEN_2 = (1 << 13),
    SH_BREAKPOINT_LEN_4 = SH_BREAKPOINT_LEN_1 | SH_BREAKPOINT_LEN_2,
    SH_BREAKPOINT_LEN_8 = (1 << 14),
};

struct sh_ubc {
    const char  *name;
    unsigned int    num_events;
    unsigned int    trap_nr;
    void        (*enable)(struct arch_hw_breakpoint *, int);
    void        (*disable)(struct arch_hw_breakpoint *, int);
    void        (*enable_all)(unsigned long);
    void        (*disable_all)(void);
    unsigned long   (*active_mask)(void);
    unsigned long   (*triggered_mask)(void);
    void        (*clear_triggered_mask)(unsigned long);
    struct clk  *clk;   /* optional interface clock / MSTP bit */
};

struct perf_event;
struct task_struct;
struct pmu;

/* Maximum number of UBC channels */
#define HBP_NUM     2

static inline int hw_breakpoint_slots(int type)
{
    return HBP_NUM;
}

/* arch/sh/kernel/hw_breakpoint.c */
extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
                       unsigned long val, void *data);

int arch_install_hw_breakpoint(struct perf_event *bp);
void arch_uninstall_hw_breakpoint(struct perf_event *bp);
void hw_breakpoint_pmu_read(struct perf_event *bp);

extern void arch_fill_perf_breakpoint(struct perf_event *bp);
extern int register_sh_ubc(struct sh_ubc *);

extern struct pmu perf_ops_bp;

#endif /* __ASM_SH_HW_BREAKPOINT_H */