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
6 * Copyright (c) 2000,2003 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>
11 #ifndef _ASM_IA64_MMZONE_H
12 #define _ASM_IA64_MMZONE_H
14 #include <linux/config.h>
16 #include <asm/meminit.h>
18 #ifdef CONFIG_DISCONTIGMEM
20 #ifdef CONFIG_IA64_DIG /* DIG systems are small */
21 # define MAX_PHYSNODE_ID 8
23 # define NR_NODE_MEMBLKS (NR_NODES * 8)
24 #else /* sn2 is the biggest case, so we use that if !DIG */
25 # define MAX_PHYSNODE_ID 2048
27 # define NR_NODE_MEMBLKS (NR_NODES * 4)
30 extern unsigned long max_low_pfn;
32 #define pfn_valid(pfn) (((pfn) < max_low_pfn) && ia64_pfn_valid(pfn))
33 #define page_to_pfn(page) ((unsigned long) (page - vmem_map))
34 #define pfn_to_page(pfn) (vmem_map + (pfn))
36 #else /* CONFIG_DISCONTIGMEM */
37 # define NR_NODE_MEMBLKS 4
38 #endif /* CONFIG_DISCONTIGMEM */
39 #endif /* _ASM_IA64_MMZONE_H */