xref: /openbmc/u-boot/include/lmb.h (revision 2d48caa4)
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