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 * Copyright (c) 2000 Silicon Graphics, Inc.  All rights reserved.
7 * Copyright (c) 2002 NEC Corp.
8 * Copyright (c) 2002 Erich Focht <efocht@ess.nec.de>
9 * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com>
10 */
11#ifndef _ASM_IA64_NODEDATA_H
12#define _ASM_IA64_NODEDATA_H
13
14#include <linux/numa.h>
15
16#include <asm/percpu.h>
17#include <asm/mmzone.h>
18
19#ifdef CONFIG_NUMA
20
21/*
22 * Node Data. One of these structures is located on each node of a NUMA system.
23 */
24
25struct pglist_data;
26struct ia64_node_data {
27	short			active_cpu_count;
28	short			node;
29	struct pglist_data	*pg_data_ptrs[MAX_NUMNODES];
30};
31
32
33/*
34 * Return a pointer to the node_data structure for the executing cpu.
35 */
36#define local_node_data		(local_cpu_data->node_data)
37
38/*
39 * Given a node id, return a pointer to the pg_data_t for the node.
40 *
41 * NODE_DATA 	- should be used in all code not related to system
42 *		  initialization. It uses pernode data structures to minimize
43 *		  offnode memory references. However, these structure are not
44 *		  present during boot. This macro can be used once cpu_init
45 *		  completes.
46 */
47#define NODE_DATA(nid)		(local_node_data->pg_data_ptrs[nid])
48
49/*
50 * LOCAL_DATA_ADDR - This is to calculate the address of other node's
51 *		     "local_node_data" at hot-plug phase. The local_node_data
52 *		     is pointed by per_cpu_page. Kernel usually use it for
53 *		     just executing cpu. However, when new node is hot-added,
54 *		     the addresses of local data for other nodes are necessary
55 *		     to update all of them.
56 */
57#define LOCAL_DATA_ADDR(pgdat)  			\
58	((struct ia64_node_data *)((u64)(pgdat) + 	\
59				   L1_CACHE_ALIGN(sizeof(struct pglist_data))))
60
61#endif /* CONFIG_NUMA */
62
63#endif /* _ASM_IA64_NODEDATA_H */
64