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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-08-07 09:55:03 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-08-07 09:55:03 +0100 |
| commit | 4fb8af10d0fd09372d52966b76922b9e82bbc950 (patch) | |
| tree | d240e4d40357583e3f3eb228dccf20122a5b31ed /arch/ia64/include/asm/nodedata.h | |
| parent | f44f82e8a20b98558486eb14497b2f71c78fa325 (diff) | |
| parent | 64a99d2a8c3ed5c4e39f3ae1cc682aa8fd3977fc (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes
Diffstat (limited to 'arch/ia64/include/asm/nodedata.h')
| -rw-r--r-- | arch/ia64/include/asm/nodedata.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/nodedata.h b/arch/ia64/include/asm/nodedata.h new file mode 100644 index 000000000000..2fb337b0e9b7 --- /dev/null +++ b/arch/ia64/include/asm/nodedata.h @@ -0,0 +1,63 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (c) 2000 Silicon Graphics, Inc. All rights reserved. + * Copyright (c) 2002 NEC Corp. + * Copyright (c) 2002 Erich Focht <efocht@ess.nec.de> + * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com> + */ +#ifndef _ASM_IA64_NODEDATA_H +#define _ASM_IA64_NODEDATA_H + +#include <linux/numa.h> + +#include <asm/percpu.h> +#include <asm/mmzone.h> + +#ifdef CONFIG_NUMA + +/* + * Node Data. One of these structures is located on each node of a NUMA system. + */ + +struct pglist_data; +struct ia64_node_data { + short active_cpu_count; + short node; + struct pglist_data *pg_data_ptrs[MAX_NUMNODES]; +}; + + +/* + * Return a pointer to the node_data structure for the executing cpu. + */ +#define local_node_data (local_cpu_data->node_data) + +/* + * Given a node id, return a pointer to the pg_data_t for the node. + * + * NODE_DATA - should be used in all code not related to system + * initialization. It uses pernode data structures to minimize + * offnode memory references. However, these structure are not + * present during boot. This macro can be used once cpu_init + * completes. + */ +#define NODE_DATA(nid) (local_node_data->pg_data_ptrs[nid]) + +/* + * LOCAL_DATA_ADDR - This is to calculate the address of other node's + * "local_node_data" at hot-plug phase. The local_node_data + * is pointed by per_cpu_page. Kernel usually use it for + * just executing cpu. However, when new node is hot-added, + * the addresses of local data for other nodes are necessary + * to update all of them. + */ +#define LOCAL_DATA_ADDR(pgdat) \ + ((struct ia64_node_data *)((u64)(pgdat) + \ + L1_CACHE_ALIGN(sizeof(struct pglist_data)))) + +#endif /* CONFIG_NUMA */ + +#endif /* _ASM_IA64_NODEDATA_H */ |