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1/* K8 NUMA support */
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_MMZONE_64_H
5#define _ASM_X86_MMZONE_64_H
6
7
8#ifdef CONFIG_NUMA
9
10#include <linux/mmdebug.h>
11
12#include <asm/smp.h>
13
14/* Simple perfect hash to map physical addresses to node numbers */
15struct memnode {
16 int shift;
17 unsigned int mapsize;
18 s16 *map;
19 s16 embedded_map[64 - 8];
20} ____cacheline_aligned; /* total size = 128 bytes */
21extern struct memnode memnode;
22#define memnode_shift memnode.shift
23#define memnodemap memnode.map
24#define memnodemapsize memnode.mapsize
25
26extern struct pglist_data *node_data[];
27
28static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
29{
30 unsigned nid;
31 VIRTUAL_BUG_ON(!memnodemap);
32 nid = memnodemap[addr >> memnode_shift];
33 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
34 return nid;
35}
36
37#define NODE_DATA(nid) (node_data[nid])
38
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)
42#endif
43#endif /* _ASM_X86_MMZONE_64_H */