LXR linux/arch/sh/include/asm/hw

   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
  12struct arch_hw_breakpoint {
  13        unsigned long   address;
  14        u16             len;
  15        u16             type;
  16};
  17
  18enum {
  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
  29struct 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
  43struct perf_event_attr;
  44struct perf_event;
  45struct task_struct;
  46struct pmu;
  47
  48/* Maximum number of UBC channels */
  49#define HBP_NUM         2
  50
  51static inline int hw_breakpoint_slots(int type)
  52{
  53        return HBP_NUM;
  54}
  55
  56/* arch/sh/kernel/hw_breakpoint.c */
  57extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
  58extern int hw_breakpoint_arch_parse(struct perf_event *bp,
  59                                    const struct perf_event_attr *attr,
  60                                    struct arch_hw_breakpoint *hw);
  61extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
  62                                           unsigned long val, void *data);
  63
  64int arch_install_hw_breakpoint(struct perf_event *bp);
  65void arch_uninstall_hw_breakpoint(struct perf_event *bp);
  66void hw_breakpoint_pmu_read(struct perf_event *bp);
  67
  68extern void arch_fill_perf_breakpoint(struct perf_event *bp);
  69extern int register_sh_ubc(struct sh_ubc *);
  70
  71extern struct pmu perf_ops_bp;
  72
  73#endif /* __ASM_SH_HW_BREAKPOINT_H */
  74