arch/xtensa/include/asm/hw_breakpoint.h

   1 /*
   2  * Xtensa hardware breakpoints/watchpoints handling functions
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2016 Cadence Design Systems Inc.
   9  */
  10
  11 #ifndef __ASM_XTENSA_HW_BREAKPOINT_H
  12 #define __ASM_XTENSA_HW_BREAKPOINT_H
  13
  14 #ifdef CONFIG_HAVE_HW_BREAKPOINT
  15
  16 #include <linux/kdebug.h>
  17 #include <linux/types.h>
  18 #include <uapi/linux/hw_breakpoint.h>
  19
  20 /* Breakpoint */
  21 #define XTENSA_BREAKPOINT_EXECUTE       0
  22
  23 /* Watchpoints */
  24 #define XTENSA_BREAKPOINT_LOAD          1
  25 #define XTENSA_BREAKPOINT_STORE         2
  26
  27 struct arch_hw_breakpoint {
  28         unsigned long address;
  29         u16 len;
  30         u16 type;
  31 };
  32
  33 struct perf_event_attr;
  34 struct perf_event;
  35 struct pt_regs;
  36 struct task_struct;
  37
  38 int hw_breakpoint_slots(int type);
  39 int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
  40 int hw_breakpoint_arch_parse(struct perf_event *bp,
  41                              const struct perf_event_attr *attr,
  42                              struct arch_hw_breakpoint *hw);
  43 int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
  44                                     unsigned long val, void *data);
  45
  46 int arch_install_hw_breakpoint(struct perf_event *bp);
  47 void arch_uninstall_hw_breakpoint(struct perf_event *bp);
  48 void hw_breakpoint_pmu_read(struct perf_event *bp);
  49 int check_hw_breakpoint(struct pt_regs *regs);
  50 void clear_ptrace_hw_breakpoint(struct task_struct *tsk);
  51
  52 #else
  53
  54 struct task_struct;
  55
  56 static inline void clear_ptrace_hw_breakpoint(struct task_struct *tsk)
  57 {
  58 }
  59
  60 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
  61 #endif /* __ASM_XTENSA_HW_BREAKPOINT_H */