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-rw-r--r--include/linux/mmiotrace.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/include/linux/mmiotrace.h b/include/linux/mmiotrace.h
index 6ec288f1fe2..d87a6cd8b68 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.