diff options
Diffstat (limited to 'include/linux/mmiotrace.h')
| -rw-r--r-- | include/linux/mmiotrace.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/linux/mmiotrace.h b/include/linux/mmiotrace.h index 6ec288f1fe24..d87a6cd8b686 100644 --- a/include/linux/mmiotrace.h +++ b/include/linux/mmiotrace.h @@ -3,6 +3,44 @@ #include <asm/types.h> +#ifdef __KERNEL__ + +#include <linux/list.h> + +struct kmmio_probe; +struct pt_regs; + +typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *, + struct pt_regs *, unsigned long addr); +typedef void (*kmmio_post_handler_t)(struct kmmio_probe *, + unsigned long condition, struct pt_regs *); + +struct kmmio_probe { + struct list_head list; + unsigned long addr; /* start location of the probe point */ + unsigned long len; /* length of the probe region */ + kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */ + kmmio_post_handler_t post_handler; /* Called after addr is executed */ +}; + +/* kmmio is active by some kmmio_probes? */ +static inline int is_kmmio_active(void) +{ + extern unsigned int kmmio_count; + return kmmio_count; +} + +extern void reference_kmmio(void); +extern void unreference_kmmio(void); +extern int register_kmmio_probe(struct kmmio_probe *p); +extern void unregister_kmmio_probe(struct kmmio_probe *p); + +/* Called from page fault handler. */ +extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); + +#endif /* __KERNEL__ */ + + /* * If you change anything here, you must bump MMIO_VERSION. * This is the relay data format for user space. |