kernel/arch/sh/include/asm/hw_breakpoint.h

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