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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * This file contains NUMA specific prototypes and definitions.
7 *
8 * 2002/08/05 Erich Focht <efocht@ess.nec.de>
9 *
10 */
11#ifndef _ASM_IA64_NUMA_H
12#define _ASM_IA64_NUMA_H
13
14#include <linux/config.h>
15
16#ifdef CONFIG_NUMA
17
18#include <linux/cache.h>
19#include <linux/cpumask.h>
20#include <linux/numa.h>
21#include <linux/smp.h>
22#include <linux/threads.h>
23
24#include <asm/mmzone.h>
25
Jack Steinera9de9832006-03-02 16:02:28 -060026extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
28
29/* Stuff below this line could be architecture independent */
30
31extern int num_node_memblks; /* total number of memory chunks */
32
33/*
34 * List of node memory chunks. Filled when parsing SRAT table to
35 * obtain information about memory nodes.
36*/
37
38struct node_memblk_s {
39 unsigned long start_paddr;
40 unsigned long size;
41 int nid; /* which logical node contains this chunk? */
42 int bank; /* which mem bank on this node */
43};
44
45struct node_cpuid_s {
46 u16 phys_id; /* id << 8 | eid */
47 int nid; /* logical node containing this CPU */
48};
49
50extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
51extern struct node_cpuid_s node_cpuid[NR_CPUS];
52
53/*
54 * ACPI 2.0 SLIT (System Locality Information Table)
55 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
56 *
57 * This is a matrix with "distances" between nodes, they should be
58 * proportional to the memory access latency ratios.
59 */
60
61extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
62#define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)])
63
64extern int paddr_to_nid(unsigned long paddr);
65
66#define local_nodeid (cpu_to_node_map[smp_processor_id()])
67
68#else /* !CONFIG_NUMA */
69
70#define paddr_to_nid(addr) 0
71
72#endif /* CONFIG_NUMA */
73
74#endif /* _ASM_IA64_NUMA_H */