| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/numa.h> |
| 15 | |
| 16 | #include <asm/percpu.h> |
| 17 | #include <asm/mmzone.h> |
| 18 | |
| Bob Picco | 1be7d99 | 2005-10-04 15:13:50 -0400 | [diff] [blame] | 19 | #ifdef CONFIG_NUMA |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| Yasunori Goto | 7049027 | 2006-06-27 02:53:39 -0700 | [diff] [blame] | 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 | |
| Bob Picco | 1be7d99 | 2005-10-04 15:13:50 -0400 | [diff] [blame] | 61 | #endif /* CONFIG_NUMA */ |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | #endif /* _ASM_IA64_NODEDATA_H */ |