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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
Matt Tolentino2b976902005-06-23 00:08:06 -07008#ifdef CONFIG_NUMA
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
10#define VIRTUAL_BUG_ON(x)
11
12#include <asm/smp.h>
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014/* Simple perfect hash to map physical addresses to node numbers */
Eric Dumazetdcf36bf2006-03-25 16:31:46 +010015struct memnode {
16 int shift;
Amul Shah076422d22007-02-13 13:26:19 +010017 unsigned int mapsize;
18 u8 *map;
19 u8 embedded_map[64-16];
20} ____cacheline_aligned; /* total size = 64 bytes */
Eric Dumazetdcf36bf2006-03-25 16:31:46 +010021extern struct memnode memnode;
22#define memnode_shift memnode.shift
23#define memnodemap memnode.map
Amul Shah076422d22007-02-13 13:26:19 +010024#define memnodemapsize memnode.mapsize
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26extern struct pglist_data *node_data[];
27
28static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
29{
Andi Kleene90f22e2005-11-05 17:25:54 +010030 unsigned nid;
Amul Shah076422d22007-02-13 13:26:19 +010031 VIRTUAL_BUG_ON(!memnodemap);
32 VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 nid = memnodemap[addr >> memnode_shift];
Andi Kleene90f22e2005-11-05 17:25:54 +010034 VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 return nid;
36}
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#define NODE_DATA(nid) (node_data[nid])
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#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
Matt Tolentino2b976902005-06-23 00:08:06 -070044#ifdef CONFIG_DISCONTIGMEM
Matt Tolentino2b976902005-06-23 00:08:06 -070045#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Andi Kleencf050132006-01-11 22:46:27 +010047extern int pfn_valid(unsigned long pfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#endif
Matt Tolentino2b976902005-06-23 00:08:06 -070049
Rohit Seth53fee042007-02-13 13:26:22 +010050#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
Matt Tolentino2b976902005-06-23 00:08:06 -070055#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#endif