linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / include / asm-parisc / mmzone.h

diff --git a/include/asm-parisc/mmzone.h b/include/asm-parisc/mmzone.h
index c878136..ae039f4 100644 (file)
--- a/include/asm-parisc/mmzone.h
+++ b/include/asm-parisc/mmzone.h
@@ -14,12 +14,34 @@ extern struct node_map_data node_data[];
 
 #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