arch/sh/include/asm/hw_breakpoint.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_HW_BREAKPOINT_H
   3 #define __ASM_SH_HW_BREAKPOINT_H
   4
   5 #include <uapi/asm/hw_breakpoint.h>
   6
   7 #define __ARCH_HW_BREAKPOINT_H
   8
   9 #include <linux/kdebug.h>
  10 #include <linux/types.h>
  11
  12 struct arch_hw_breakpoint {
  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_attr;
  44 struct perf_event;
  45 struct task_struct;
  46 struct pmu;
  47
  48 /* Maximum number of UBC channels */
  49 #define HBP_NUM         2
  50
  51 static inline int hw_breakpoint_slots(int type)
  52 {
  53         return HBP_NUM;
  54 }
  55
  56 /* arch/sh/kernel/hw_breakpoint.c */
  57 extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
  58 extern int hw_breakpoint_arch_parse(struct perf_event *bp,
  59                                     const struct perf_event_attr *attr,
  60                                     struct arch_hw_breakpoint *hw);
  61 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
  62                                            unsigned long val, void *data);
  63
  64 int arch_install_hw_breakpoint(struct perf_event *bp);
  65 void arch_uninstall_hw_breakpoint(struct perf_event *bp);
  66 void hw_breakpoint_pmu_read(struct perf_event *bp);
  67
  68 extern void arch_fill_perf_breakpoint(struct perf_event *bp);
  69 extern int register_sh_ubc(struct sh_ubc *);
  70
  71 extern struct pmu perf_ops_bp;
  72
  73 #endif /* __ASM_SH_HW_BREAKPOINT_H */