-#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_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
-#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 local_mapnr(kvaddr) \
-({ \
- unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT; \
- (__pfn - node_start_pfn(pfn_to_nid(__pfn))); \
-})
-
-#define pfn_to_page(pfn) \
-({ \
- unsigned long __pfn = (pfn); \
- int __node = pfn_to_nid(__pfn); \
- &node_mem_map(__node)[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; \
-})
+#define BADCHUNK ((unsigned char)0xff)
+#define CHUNKSZ (256*1024*1024)
+#define CHUNKSHIFT 28
+#define CHUNKMASK (~(CHUNKSZ - 1))
+#define CHUNKNUM(paddr) ((paddr) >> CHUNKSHIFT)