#define NODE_DATA(nid) (&node_data[nid].pg_data)
+/*
+ * Given a kernel address, find the home node of the underlying memory.
+ */
+#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)
+
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) \
({ \
pg_data_t *__pgdat = NODE_DATA(nid); \
__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
})
+#define node_localnr(pfn, nid) ((pfn) - node_start_pfn(nid))
+
+#define pfn_to_page(pfn) \
+({ \
+ unsigned long __pfn = (pfn); \
+ int __node = pfn_to_nid(__pfn); \
+ &NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \
+})
+
+#define page_to_pfn(pg) \
+({ \
+ struct page *__page = pg; \
+ struct zone *__zone = page_zone(__page); \
+ BUG_ON(__zone == NULL); \
+ (unsigned long)(__page - __zone->zone_mem_map) \
+ + __zone->zone_start_pfn; \
+})
/* We have these possible memory map layouts:
* Astro: 0-3.75, 67.75-68, 4-64