nodedata.h (1898B)
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 */