#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
+/*
+ * Change "struct page" to physical address.
+ */
+#define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
+
/* Memory mapped IO */
extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);