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-rw-r--r--include/asm-ia64/numa.h82
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diff --git a/include/asm-ia64/numa.h b/include/asm-ia64/numa.h
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1/*
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
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
25#define NUMA_NO_NODE -1
26
27extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
28extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
29extern pg_data_t *pgdat_list[MAX_NUMNODES];
30
31/* Stuff below this line could be architecture independent */
32
33extern int num_node_memblks; /* total number of memory chunks */
34
35/*
36 * List of node memory chunks. Filled when parsing SRAT table to
37 * obtain information about memory nodes.
38*/
39
40struct node_memblk_s {
41 unsigned long start_paddr;
42 unsigned long size;
43 int nid; /* which logical node contains this chunk? */
44 int bank; /* which mem bank on this node */
45};
46
47struct node_cpuid_s {
48 u16 phys_id; /* id << 8 | eid */
49 int nid; /* logical node containing this CPU */
50};
51
52extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
53extern struct node_cpuid_s node_cpuid[NR_CPUS];
54
55/*
56 * ACPI 2.0 SLIT (System Locality Information Table)
57 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
58 *
59 * This is a matrix with "distances" between nodes, they should be
60 * proportional to the memory access latency ratios.
61 */
62
63extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
64#define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)])
65
66extern int paddr_to_nid(unsigned long paddr);
67
68#define local_nodeid (cpu_to_node_map[smp_processor_id()])
69
70extern void map_cpu_to_node(int cpu, int nid);
71extern void unmap_cpu_from_node(int cpu, int nid);
72
73
74#else /* !CONFIG_NUMA */
75#define map_cpu_to_node(cpu, nid) do{}while(0)
76#define unmap_cpu_from_node(cpu, nid) do{}while(0)
77
78#define paddr_to_nid(addr) 0
79
80#endif /* CONFIG_NUMA */
81
82#endif /* _ASM_IA64_NUMA_H */