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
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>
11 #ifndef _ASM_IA64_NODEDATA_H
12 #define _ASM_IA64_NODEDATA_H
14 #include <linux/numa.h>
16 #include <asm/percpu.h>
17 #include <asm/mmzone.h>
22 * Node Data. One of these structures is located on each node of a NUMA system.
26 struct ia64_node_data
{
27 short active_cpu_count
;
29 struct pglist_data
*pg_data_ptrs
[MAX_NUMNODES
];
34 * Return a pointer to the node_data structure for the executing cpu.
36 #define local_node_data (local_cpu_data->node_data)
39 * Given a node id, return a pointer to the pg_data_t for the node.
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
47 #define NODE_DATA(nid) (local_node_data->pg_data_ptrs[nid])
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.
57 #define LOCAL_DATA_ADDR(pgdat) \
58 ((struct ia64_node_data *)((u64)(pgdat) + \
59 L1_CACHE_ALIGN(sizeof(struct pglist_data))))
61 #endif /* CONFIG_NUMA */
63 #endif /* _ASM_IA64_NODEDATA_H */
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