• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
25 struct pglist_data;
26 struct 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