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

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  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 */
 74 

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