path: root/include/lmb.h (plain)
blob: 6b6959fd8604d9f28d219de691928980b316eef7

1	#ifndef _LINUX_LMB_H
2	#define _LINUX_LMB_H
3	#ifdef __KERNEL__
4
5	#include <asm/types.h>
6	/*
7	* Logical memory blocks.
8	*
9	* Copyright (C) 2001 Peter Bergner, IBM Corp.
10	*
11	* SPDX-License-Identifier: GPL-2.0+
12	*/
13
14	#define MAX_LMB_REGIONS 8
15
16	struct lmb_property {
17	phys_addr_t base;
18	phys_size_t size;
19	};
20
21	struct lmb_region {
22	unsigned long cnt;
23	phys_size_t size;
24	struct lmb_property region[MAX_LMB_REGIONS+1];
25	};
26
27	struct lmb {
28	struct lmb_region memory;
29	struct lmb_region reserved;
30	};
31
32	extern struct lmb lmb;
33
34	extern void lmb_init(struct lmb *lmb);
35	extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
36	extern long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size);
37	extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
38	extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
39	phys_addr_t max_addr);
40	extern phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
41	phys_addr_t max_addr);
42	extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
43	extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
44
45	extern void lmb_dump_all(struct lmb *lmb);
46
47	static inline phys_size_t
48	lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
49	{
50	return type->region[region_nr].size;
51	}
52
53	void board_lmb_reserve(struct lmb *lmb);
54	void arch_lmb_reserve(struct lmb *lmb);
55
56	#endif /* __KERNEL__ */
57
58	#endif /* _LINUX_LMB_H */
59