1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _TOOLS_MMZONE_H
3 #define _TOOLS_MMZONE_H
4 
5 #include <linux/atomic.h>
6 #include <linux/memory_hotplug.h>
7 
8 struct pglist_data *first_online_pgdat(void);
9 struct pglist_data *next_online_pgdat(struct pglist_data *pgdat);
10 
11 #define for_each_online_pgdat(pgdat)			\
12 	for (pgdat = first_online_pgdat();		\
13 	     pgdat;					\
14 	     pgdat = next_online_pgdat(pgdat))
15 
16 enum zone_type {
17 	__MAX_NR_ZONES
18 };
19 
20 #define MAX_NR_ZONES __MAX_NR_ZONES
21 #define MAX_PAGE_ORDER 10
22 #define MAX_ORDER_NR_PAGES (1 << MAX_PAGE_ORDER)
23 
24 #define pageblock_order		MAX_PAGE_ORDER
25 #define pageblock_nr_pages	BIT(pageblock_order)
26 #define pageblock_align(pfn)	ALIGN((pfn), pageblock_nr_pages)
27 #define pageblock_start_pfn(pfn)	ALIGN_DOWN((pfn), pageblock_nr_pages)
28 
29 struct zone {
30 	atomic_long_t		managed_pages;
31 };
32 
33 typedef struct pglist_data {
34 	struct zone node_zones[MAX_NR_ZONES];
35 
36 } pg_data_t;
37 
38 #endif
39