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_64_MMZONE_H
5 #define _ASM_X86_64_MMZONE_H 1
6
7
8 #ifdef CONFIG_NUMA
9
10 #define VIRTUAL_BUG_ON(x)
11
12 #include <asm/smp.h>
13
14 /* Simple perfect hash to map physical addresses to node numbers */
15 struct memnode {
16 int shift;
17 unsigned int mapsize;
18 s16 *map;
19 s16 embedded_map[64-8];
20 } ____cacheline_aligned; /* total size = 128 bytes */
21 extern struct memnode memnode;
22 #define memnode_shift memnode.shift
23 #define memnodemap memnode.map
24 #define memnodemapsize memnode.mapsize
25
26 extern struct pglist_data *node_data[];
27
28 static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
29 {
30 unsigned nid;
31 VIRTUAL_BUG_ON(!memnodemap);
32 VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize);
33 nid = memnodemap[addr >> memnode_shift];
34 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
35 return nid;
36 }
37
38 #define NODE_DATA(nid) (node_data[nid])
39
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)
43
44 extern int early_pfn_to_nid(unsigned long pfn);
45
46 #ifdef CONFIG_NUMA_EMU
47 #define FAKE_NODE_MIN_SIZE (64*1024*1024)
48 #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1uL))
49 #endif
50
51 #endif
52 #endif
53
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