1*4882a593Smuzhiyun #ifndef _LINUX_LMB_H
2*4882a593Smuzhiyun #define _LINUX_LMB_H
3*4882a593Smuzhiyun #ifdef __KERNEL__
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <asm/types.h>
6*4882a593Smuzhiyun /*
7*4882a593Smuzhiyun * Logical memory blocks.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Copyright (C) 2001 Peter Bergner, IBM Corp.
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #define MAX_LMB_REGIONS 16
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun struct lmb_property {
17*4882a593Smuzhiyun phys_addr_t base;
18*4882a593Smuzhiyun phys_size_t size;
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun struct lmb_region {
22*4882a593Smuzhiyun unsigned long cnt;
23*4882a593Smuzhiyun phys_size_t size;
24*4882a593Smuzhiyun struct lmb_property region[MAX_LMB_REGIONS+1];
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun struct lmb {
28*4882a593Smuzhiyun struct lmb_region memory;
29*4882a593Smuzhiyun struct lmb_region reserved;
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun extern struct lmb lmb;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun extern void lmb_init(struct lmb *lmb);
35*4882a593Smuzhiyun extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
36*4882a593Smuzhiyun extern long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size);
37*4882a593Smuzhiyun extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
38*4882a593Smuzhiyun extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
39*4882a593Smuzhiyun phys_addr_t max_addr);
40*4882a593Smuzhiyun extern phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
41*4882a593Smuzhiyun phys_addr_t max_addr);
42*4882a593Smuzhiyun extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
43*4882a593Smuzhiyun extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun extern void lmb_dump_all(struct lmb *lmb);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun static inline phys_size_t
lmb_size_bytes(struct lmb_region * type,unsigned long region_nr)48*4882a593Smuzhiyun lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun return type->region[region_nr].size;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun void board_lmb_reserve(struct lmb *lmb);
54*4882a593Smuzhiyun void arch_lmb_reserve(struct lmb *lmb);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun #endif /* __KERNEL__ */
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun #endif /* _LINUX_LMB_H */
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