1 /*
2  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
3  *
4  * PowerPC64 port:
5  * Copyright (C) 2002 Anton Blanchard, IBM Corp.
6  */
7 #ifndef _ASM_MMZONE_H_
8 #define _ASM_MMZONE_H_
9 #ifdef __KERNEL__
10 
11 #include <linux/cpumask.h>
12 
13 /*
14  * generic non-linear memory support:
15  *
16  * 1) we will not split memory into more chunks than will fit into the
17  *    flags field of the struct page
18  */
19 
20 #ifdef CONFIG_NEED_MULTIPLE_NODES
21 
22 extern struct pglist_data *node_data[];
23 /*
24  * Return a pointer to the node data for node n.
25  */
26 #define NODE_DATA(nid)		(node_data[nid])
27 
28 /*
29  * Following are specific to this numa platform.
30  */
31 
32 extern int numa_cpu_lookup_table[];
33 extern cpumask_var_t node_to_cpumask_map[];
34 #ifdef CONFIG_MEMORY_HOTPLUG
35 extern unsigned long max_pfn;
36 u64 memory_hotplug_max(void);
37 #else
38 #define memory_hotplug_max() memblock_end_of_DRAM()
39 #endif
40 
41 /*
42  * Following are macros that each numa implmentation must define.
43  */
44 
45 #define node_start_pfn(nid)	(NODE_DATA(nid)->node_start_pfn)
46 #define node_end_pfn(nid)	(NODE_DATA(nid)->node_end_pfn)
47 
48 #else
49 #define memory_hotplug_max() memblock_end_of_DRAM()
50 #endif /* CONFIG_NEED_MULTIPLE_NODES */
51 
52 #endif /* __KERNEL__ */
53 #endif /* _ASM_MMZONE_H_ */
54