2 /* Copyright 2002,2003 by Andi Kleen, SuSE Labs */
3 /* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */
4 #ifndef _ASM_X86_64_MMZONE_H
5 #define _ASM_X86_64_MMZONE_H 1
7 #include <linux/config.h>
11 #define VIRTUAL_BUG_ON(x)
15 #define NODEMAPSIZE 0xfff
17 /* Simple perfect hash to map physical addresses to node numbers */
18 extern int memnode_shift;
19 extern u8 memnodemap[NODEMAPSIZE];
21 extern struct pglist_data *node_data[];
23 static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
26 VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
27 nid = memnodemap[addr >> memnode_shift];
28 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
32 #define NODE_DATA(nid) (node_data[nid])
34 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
35 #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
36 NODE_DATA(nid)->node_spanned_pages)
38 #ifdef CONFIG_DISCONTIGMEM
39 #define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
40 #define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr))
42 extern struct page *pfn_to_page(unsigned long pfn);
43 extern unsigned long page_to_pfn(struct page *page);
44 extern int pfn_valid(unsigned long pfn);
47 #define local_mapnr(kvaddr) \
48 ( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)) )