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