xref: /openbmc/u-boot/include/lmb.h (revision 0e31666d)
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 void lmb_init(struct lmb *lmb);
32 extern void lmb_init_and_reserve(struct lmb *lmb, phys_addr_t base,
33 				 phys_size_t size, void *fdt_blob);
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 phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base,
42 				  phys_size_t size);
43 extern phys_size_t lmb_get_unreserved_size(struct lmb *lmb, phys_addr_t addr);
44 extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
45 extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
46 
47 extern void lmb_dump_all(struct lmb *lmb);
48 
49 static inline phys_size_t
50 lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
51 {
52 	return type->region[region_nr].size;
53 }
54 
55 void board_lmb_reserve(struct lmb *lmb);
56 void arch_lmb_reserve(struct lmb *lmb);
57 
58 #endif /* __KERNEL__ */
59 
60 #endif /* _LINUX_LMB_H */
61