patch-2.4.20 linux-2.4.20/include/asm-parisc/mmzone.h

• Lines: 32
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-parisc/mmzone.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/include/asm-parisc/mmzone.h linux-2.4.20/include/asm-parisc/mmzone.h
@@ -0,0 +1,31 @@
+#ifndef _PARISC_MMZONE_H
+#define _PARISC_MMZONE_H
+
+struct node_map_data {
+    pg_data_t pg_data;
+    struct page *adj_node_mem_map;
+};
+
+extern struct node_map_data node_data[];
+extern unsigned char *chunkmap;
+
+#define BADCHUNK                ((unsigned char)0xff)
+#define CHUNKSZ                 (256*1024*1024)
+#define CHUNKSHIFT              28
+#define CHUNKMASK               (~(CHUNKSZ - 1))
+#define CHUNKNUM(paddr)         ((paddr) >> CHUNKSHIFT)
+
+#define NODE_DATA(nid)          (&node_data[nid].pg_data)
+#define NODE_MEM_MAP(nid)       (NODE_DATA(nid)->node_mem_map)
+#define ADJ_NODE_MEM_MAP(nid)   (node_data[nid].adj_node_mem_map)
+
+#define phys_to_page(paddr) \
+	(ADJ_NODE_MEM_MAP(chunkmap[CHUNKNUM((paddr))]) \
+	+ ((paddr) >> PAGE_SHIFT))
+
+#define virt_to_page(kvaddr) phys_to_page(__pa(kvaddr))
+
+/* This is kind of bogus, need to investigate performance of doing it right */
+#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)
+
+#endif /* !_PARISC_MMZONE_H */