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_PAGE_ORDER 10
21 #define MAX_ORDER_NR_PAGES (1 << MAX_PAGE_ORDER)
22
23 #define pageblock_order MAX_PAGE_ORDER
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
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