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
25extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
26extern 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
67extern void map_cpu_to_node(int cpu, int nid);
68extern void unmap_cpu_from_node(int cpu, int nid);
69
70
71#else /* !CONFIG_NUMA */
72#define map_cpu_to_node(cpu, nid)	do{}while(0)
73#define unmap_cpu_from_node(cpu, nid)	do{}while(0)
74
75#define paddr_to_nid(addr)	0
76
77#endif /* CONFIG_NUMA */
78
79#endif /* _ASM_IA64_NUMA_H */
80