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 /* Should really switch to dynamic allocation at some point */
16 #define NODEMAPSIZE 0x4fff
18 /* Simple perfect hash to map physical addresses to node numbers */
22 } ____cacheline_aligned;
23 extern struct memnode memnode;
24 #define memnode_shift memnode.shift
25 #define memnodemap memnode.map
27 extern struct pglist_data *node_data[];
29 static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
32 VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
33 nid = memnodemap[addr >> memnode_shift];
34 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
38 #define NODE_DATA(nid) (node_data[nid])
40 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
41 #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
42 NODE_DATA(nid)->node_spanned_pages)
44 #ifdef CONFIG_DISCONTIGMEM
45 #define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
46 #define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr))
48 extern int pfn_valid(unsigned long pfn);