arch/sh/include/asm/hw_breakpoint.h

   1 #ifndef __ASM_SH_HW_BREAKPOINT_H
   2 #define __ASM_SH_HW_BREAKPOINT_H
   3
   4 #ifdef __KERNEL__
   5 #define __ARCH_HW_BREAKPOINT_H
   6
   7 #include <linux/kdebug.h>
   8 #include <linux/types.h>
   9
  10 struct arch_hw_breakpoint {
  11         char            *name; /* Contains name of the symbol to set bkpt */
  12         unsigned long   address;
  13         u16             len;
  14         u16             type;
  15 };
  16
  17 enum {
  18         SH_BREAKPOINT_READ      = (1 << 1),
  19         SH_BREAKPOINT_WRITE     = (1 << 2),
  20         SH_BREAKPOINT_RW        = SH_BREAKPOINT_READ | SH_BREAKPOINT_WRITE,
  21
  22         SH_BREAKPOINT_LEN_1     = (1 << 12),
  23         SH_BREAKPOINT_LEN_2     = (1 << 13),
  24         SH_BREAKPOINT_LEN_4     = SH_BREAKPOINT_LEN_1 | SH_BREAKPOINT_LEN_2,
  25         SH_BREAKPOINT_LEN_8     = (1 << 14),
  26 };
  27
  28 struct sh_ubc {
  29         const char      *name;
  30         unsigned int    num_events;
  31         unsigned int    trap_nr;
  32         void            (*enable)(struct arch_hw_breakpoint *, int);
  33         void            (*disable)(struct arch_hw_breakpoint *, int);
  34         void            (*enable_all)(unsigned long);
  35         void            (*disable_all)(void);
  36         unsigned long   (*active_mask)(void);
  37         unsigned long   (*triggered_mask)(void);
  38         void            (*clear_triggered_mask)(unsigned long);
  39         struct clk      *clk;   /* optional interface clock / MSTP bit */
  40 };
  41
  42 struct perf_event;
  43 struct task_struct;
  44 struct pmu;
  45
  46 /* Maximum number of UBC channels */
  47 #define HBP_NUM         2
  48
  49 static inline int hw_breakpoint_slots(int type)
  50 {
  51         return HBP_NUM;
  52 }
  53
  54 /* arch/sh/kernel/hw_breakpoint.c */
  55 extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
  56 extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
  57 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
  58                                            unsigned long val, void *data);
  59
  60 int arch_install_hw_breakpoint(struct perf_event *bp);
  61 void arch_uninstall_hw_breakpoint(struct perf_event *bp);
  62 void hw_breakpoint_pmu_read(struct perf_event *bp);
  63
  64 extern void arch_fill_perf_breakpoint(struct perf_event *bp);
  65 extern int register_sh_ubc(struct sh_ubc *);
  66
  67 extern struct pmu perf_ops_bp;
  68
  69 #endif /* __KERNEL__ */
  70 #endif /* __ASM_SH_HW_BREAKPOINT_H */