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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
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
15#ifdef CONFIG_NUMA
16
17#include <linux/cache.h>
18#include <linux/cpumask.h>
19#include <linux/numa.h>
20#include <linux/smp.h>
21#include <linux/threads.h>
22
23#include <asm/mmzone.h>
24
Jack Steinera9de9832006-03-02 16:02:28 -060025extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
Linus Torvalds1da177e2005-04-16 15:20:36 -070026extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
27
28/* Stuff below this line could be architecture independent */
29
30extern int num_node_memblks; /* total number of memory chunks */
31
32/*
33 * List of node memory chunks. Filled when parsing SRAT table to
34 * obtain information about memory nodes.
35*/
36
37struct node_memblk_s {
38 unsigned long start_paddr;
39 unsigned long size;
40 int nid; /* which logical node contains this chunk? */
41 int bank; /* which mem bank on this node */
42};
43
44struct node_cpuid_s {
45 u16 phys_id; /* id << 8 | eid */
46 int nid; /* logical node containing this CPU */
47};
48
49extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
50extern struct node_cpuid_s node_cpuid[NR_CPUS];
51
52/*
53 * ACPI 2.0 SLIT (System Locality Information Table)
54 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
55 *
56 * This is a matrix with "distances" between nodes, they should be
57 * proportional to the memory access latency ratios.
58 */
59
60extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
61#define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)])
62
63extern int paddr_to_nid(unsigned long paddr);
64
65#define local_nodeid (cpu_to_node_map[smp_processor_id()])
66
KAMEZAWA Hiroyuki3212fe12006-09-25 16:25:31 -070067extern void map_cpu_to_node(int cpu, int nid);
68extern void unmap_cpu_from_node(int cpu, int nid);
69
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#else /* !CONFIG_NUMA */
KAMEZAWA Hiroyukibbf2bef2006-09-27 01:49:25 -070072#define map_cpu_to_node(cpu, nid) do{}while(0)
73#define unmap_cpu_from_node(cpu, nid) do{}while(0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75#define paddr_to_nid(addr) 0
76
77#endif /* CONFIG_NUMA */
78
79#endif /* _ASM_IA64_NUMA_H */