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 */
15struct memnode {
16	int shift;
17	unsigned int mapsize;
18	u8 *map;
19	u8 embedded_map[64-16];
20} ____cacheline_aligned; /* total size = 64 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	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#ifdef CONFIG_DISCONTIGMEM
45#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
46
47extern int pfn_valid(unsigned long pfn);
48#endif
49
50#ifdef CONFIG_NUMA_EMU
51#define FAKE_NODE_MIN_SIZE	(64*1024*1024)
52#define FAKE_NODE_MIN_HASH_MASK	(~(FAKE_NODE_MIN_SIZE - 1uL))
53#endif
54
55#endif
56#endif
57