diff options
Diffstat (limited to 'arch/powerpc/include/asm/hw_breakpoint.h')
| -rw-r--r-- | arch/powerpc/include/asm/hw_breakpoint.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h new file mode 100644 index 000000000000..1c33ec17ca36 --- /dev/null +++ b/arch/powerpc/include/asm/hw_breakpoint.h @@ -0,0 +1,74 @@ +/* + * PowerPC BookIII S hardware breakpoint definitions + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright 2010, IBM Corporation. + * Author: K.Prasad <prasad@linux.vnet.ibm.com> + * + */ + +#ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H +#define _PPC_BOOK3S_64_HW_BREAKPOINT_H + +#ifdef __KERNEL__ +#ifdef CONFIG_HAVE_HW_BREAKPOINT + +struct arch_hw_breakpoint { + bool extraneous_interrupt; + u8 len; /* length of the target data symbol */ + int type; + unsigned long address; +}; + +#include <linux/kdebug.h> +#include <asm/reg.h> +#include <asm/system.h> + +struct perf_event; +struct pmu; +struct perf_sample_data; + +#define HW_BREAKPOINT_ALIGN 0x7 +/* Maximum permissible length of any HW Breakpoint */ +#define HW_BREAKPOINT_LEN 0x8 + +extern int hw_breakpoint_slots(int type); +extern int arch_bp_generic_fields(int type, int *gen_bp_type); +extern int arch_check_bp_in_kernelspace(struct perf_event *bp); +extern int arch_validate_hwbkpt_settings(struct perf_event *bp); +extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, + unsigned long val, void *data); +int arch_install_hw_breakpoint(struct perf_event *bp); +void arch_uninstall_hw_breakpoint(struct perf_event *bp); +void hw_breakpoint_pmu_read(struct perf_event *bp); +extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); + +extern struct pmu perf_ops_bp; +extern void ptrace_triggered(struct perf_event *bp, int nmi, + struct perf_sample_data *data, struct pt_regs *regs); +static inline void hw_breakpoint_disable(void) +{ + set_dabr(0); +} +extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs); + +#else /* CONFIG_HAVE_HW_BREAKPOINT */ +static inline void hw_breakpoint_disable(void) { } +static inline void thread_change_pc(struct task_struct *tsk, + struct pt_regs *regs) { } +#endif /* CONFIG_HAVE_HW_BREAKPOINT */ +#endif /* __KERNEL__ */ +#endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */ |