projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | ||
| 1da177e4 LT |
14 | #include <linux/numa.h> |
| 15 | ||
| 16 | #include <asm/percpu.h> | |
| 17 | #include <asm/mmzone.h> | |
| 18 | ||
| 1be7d993 | 19 | #ifdef CONFIG_NUMA |
| 1da177e4 LT |
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 | ||
| 7049027c YG |
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 | ||
| 1be7d993 | 61 | #endif /* CONFIG_NUMA */ |
| 1da177e4 LT |
62 | |
| 63 | #endif /* _ASM_IA64_NODEDATA_H */ |