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hw_breakpoint.h

hw_breakpoint.h 2.5 KB
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  1. /*
    2. 

  2.  * PowerPC BookIII S hardware breakpoint definitions
    3. 

  3.  *
    4. 

  4.  * This program is free software; you can redistribute it and/or modify
    5. 

  5.  * it under the terms of the GNU General Public License as published by
    6. 

  6.  * the Free Software Foundation; either version 2 of the License, or
    7. 

  7.  * (at your option) any later version.
    8. 

  8.  *
    9. 

  9.  * This program is distributed in the hope that it will be useful,
    10. 

  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11. 

  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12. 

  12.  * GNU General Public License for more details.
    13. 

  13.  *
    14. 

  14.  * You should have received a copy of the GNU General Public License
    15. 

  15.  * along with this program; if not, write to the Free Software
    16. 

  16.  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    17. 

  17.  *
    18. 

  18.  * Copyright 2010, IBM Corporation.
    19. 

  19.  * Author: K.Prasad <prasad@linux.vnet.ibm.com>
    20. 

  20.  *
    21. 

  21.  */
    22. 

  22. 

  23. #ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H
    24. 

  24. #define _PPC_BOOK3S_64_HW_BREAKPOINT_H
    25. 

  25. 

  26. #ifdef	__KERNEL__
    27. 

  27. #ifdef CONFIG_HAVE_HW_BREAKPOINT
    28. 

  28. 

  29. struct arch_hw_breakpoint {
    30. 

  30. 	unsigned long	address;
    31. 

  31. 	unsigned long	dabrx;
    32. 

  32. 	int		type;
    33. 

  33. 	u8		len; /* length of the target data symbol */
    34. 

  34. 	bool		extraneous_interrupt;
    35. 

  35. };
    36. 

  36. 

  37. #include <linux/kdebug.h>
    38. 

  38. #include <asm/reg.h>
    39. 

  39. #include <asm/debug.h>
    40. 

  40. 

  41. struct perf_event;
    42. 

  42. struct pmu;
    43. 

  43. struct perf_sample_data;
    44. 

  44. 

  45. #define HW_BREAKPOINT_ALIGN 0x7
    46. 

  46. /* Maximum permissible length of any HW Breakpoint */
    47. 

  47. #define HW_BREAKPOINT_LEN 0x8
    48. 

  48. 

  49. extern int hw_breakpoint_slots(int type);
    50. 

  50. extern int arch_bp_generic_fields(int type, int *gen_bp_type);
    51. 

  51. extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
    52. 

  52. extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
    53. 

  53. extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
    54. 

  54. 						unsigned long val, void *data);
    55. 

  55. int arch_install_hw_breakpoint(struct perf_event *bp);
    56. 

  56. void arch_uninstall_hw_breakpoint(struct perf_event *bp);
    57. 

  57. void hw_breakpoint_pmu_read(struct perf_event *bp);
    58. 

  58. extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
    59. 

  59. 

  60. extern struct pmu perf_ops_bp;
    61. 

  61. extern void ptrace_triggered(struct perf_event *bp,
    62. 

  62. 			struct perf_sample_data *data, struct pt_regs *regs);
    63. 

  63. static inline void hw_breakpoint_disable(void)
    64. 

  64. {
    65. 

  65. 	set_dabr(0, 0);
    66. 

  66. }
    67. 

  67. extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
    68. 

  68. 

  69. #else	/* CONFIG_HAVE_HW_BREAKPOINT */
    70. 

  70. static inline void hw_breakpoint_disable(void) { }
    71. 

  71. static inline void thread_change_pc(struct task_struct *tsk,
    72. 

  72. 					struct pt_regs *regs) { }
    73. 

  73. #endif	/* CONFIG_HAVE_HW_BREAKPOINT */
    74. 

  74. #endif	/* __KERNEL__ */
    75. 

  75. #endif	/* _PPC_BOOK3S_64_HW_BREAKPOINT_H */
    76.