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
10 #define VIRTUAL_BUG_ON(x)
14 /* Should really switch to dynamic allocation at some point */
15 #define NODEMAPSIZE 0x4fff
17 /* Simple perfect hash to map physical addresses to node numbers */
21 } ____cacheline_aligned;
22 extern struct memnode memnode;
23 #define memnode_shift memnode.shift
24 #define memnodemap memnode.map
26 extern struct pglist_data *node_data[];
28 static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
31 VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
32 nid = memnodemap[addr >> memnode_shift];
33 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
37 #define NODE_DATA(nid) (node_data[nid])
39 #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
40 #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
41 NODE_DATA(nid)->node_spanned_pages)
43 #ifdef CONFIG_DISCONTIGMEM
44 #define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
46 extern int pfn_valid(unsigned long pfn);