1 /* SPDX-License-Identifier: GPL-2.0+ */
2 #ifndef _LINUX_LMB_H
3 #define _LINUX_LMB_H
4 #ifdef __KERNEL__
5
6 #include <asm/types.h>
7 /*
8 * Logical memory blocks.
9 *
10 * Copyright (C) 2001 Peter Bergner, IBM Corp.
11 */
12
13 #define MAX_LMB_REGIONS 8
14
15 struct lmb_property {
16 phys_addr_t base;
17 phys_size_t size;
18 };
19
20 struct lmb_region {
21 unsigned long cnt;
22 phys_size_t size;
23 struct lmb_property region[MAX_LMB_REGIONS+1];
24 };
25
26 struct lmb {
27 struct lmb_region memory;
28 struct lmb_region reserved;
29 };
30
31 extern struct lmb lmb;
32
33 extern void lmb_init(struct lmb *lmb);
34 extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
35 extern long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size);
36 extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
37 extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
38 phys_addr_t max_addr);
39 extern phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
40 phys_addr_t max_addr);
41 extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
42 extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
43
44 extern void lmb_dump_all(struct lmb *lmb);
45
46 static inline phys_size_t
lmb_size_bytes(struct lmb_region * type,unsigned long region_nr)47 lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
48 {
49 return type->region[region_nr].size;
50 }
51
52 void board_lmb_reserve(struct lmb *lmb);
53 void arch_lmb_reserve(struct lmb *lmb);
54
55 #endif /* __KERNEL__ */
56
57 #endif /* _LINUX_LMB_H */
58