1 #ifndef _LINUX_MEMBLOCK_H
2 #define _LINUX_MEMBLOCK_H
5 #ifdef CONFIG_HAVE_MEMBLOCK
7 * Logical memory blocks.
9 * Copyright (C) 2001 Peter Bergner, IBM Corp.
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #include <linux/init.h>
20 #define INIT_MEMBLOCK_REGIONS 128
22 struct memblock_region
{
25 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
30 struct memblock_type
{
31 unsigned long cnt
; /* number of regions */
32 unsigned long max
; /* size of the allocated array */
33 phys_addr_t total_size
; /* size of all regions */
34 struct memblock_region
*regions
;
38 phys_addr_t current_limit
;
39 struct memblock_type memory
;
40 struct memblock_type reserved
;
43 extern struct memblock memblock
;
44 extern int memblock_debug
;
46 #define memblock_dbg(fmt, ...) \
47 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
49 phys_addr_t
memblock_find_in_range_node(phys_addr_t start
, phys_addr_t end
,
50 phys_addr_t size
, phys_addr_t align
, int nid
);
51 phys_addr_t
memblock_find_in_range(phys_addr_t start
, phys_addr_t end
,
52 phys_addr_t size
, phys_addr_t align
);
53 phys_addr_t
get_allocated_memblock_reserved_regions_info(phys_addr_t
*addr
);
54 void memblock_allow_resize(void);
55 int memblock_add_node(phys_addr_t base
, phys_addr_t size
, int nid
);
56 int memblock_add(phys_addr_t base
, phys_addr_t size
);
57 int memblock_remove(phys_addr_t base
, phys_addr_t size
);
58 int memblock_free(phys_addr_t base
, phys_addr_t size
);
59 int memblock_reserve(phys_addr_t base
, phys_addr_t size
);
61 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
62 void __next_mem_pfn_range(int *idx
, int nid
, unsigned long *out_start_pfn
,
63 unsigned long *out_end_pfn
, int *out_nid
);
66 * for_each_mem_pfn_range - early memory pfn range iterator
67 * @i: an integer used as loop variable
68 * @nid: node selector, %MAX_NUMNODES for all nodes
69 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
70 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
71 * @p_nid: ptr to int for nid of the range, can be %NULL
73 * Walks over configured memory ranges.
75 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
76 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
77 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
78 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
80 void __next_free_mem_range(u64
*idx
, int nid
, phys_addr_t
*out_start
,
81 phys_addr_t
*out_end
, int *out_nid
);
84 * for_each_free_mem_range - iterate through free memblock areas
85 * @i: u64 used as loop variable
86 * @nid: node selector, %MAX_NUMNODES for all nodes
87 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
88 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
89 * @p_nid: ptr to int for nid of the range, can be %NULL
91 * Walks over free (memory && !reserved) areas of memblock. Available as
92 * soon as memblock is initialized.
94 #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
96 __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
97 i != (u64)ULLONG_MAX; \
98 __next_free_mem_range(&i, nid, p_start, p_end, p_nid))
100 void __next_free_mem_range_rev(u64
*idx
, int nid
, phys_addr_t
*out_start
,
101 phys_addr_t
*out_end
, int *out_nid
);
104 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
105 * @i: u64 used as loop variable
106 * @nid: node selector, %MAX_NUMNODES for all nodes
107 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
108 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
109 * @p_nid: ptr to int for nid of the range, can be %NULL
111 * Walks over free (memory && !reserved) areas of memblock in reverse
112 * order. Available as soon as memblock is initialized.
114 #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
115 for (i = (u64)ULLONG_MAX, \
116 __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \
117 i != (u64)ULLONG_MAX; \
118 __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))
120 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
121 int memblock_set_node(phys_addr_t base
, phys_addr_t size
, int nid
);
123 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
128 static inline int memblock_get_region_node(const struct memblock_region
*r
)
133 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
137 static inline int memblock_get_region_node(const struct memblock_region
*r
)
141 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
143 phys_addr_t
memblock_alloc_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
144 phys_addr_t
memblock_alloc_try_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
146 phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
);
148 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
149 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
150 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
152 phys_addr_t
memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
153 phys_addr_t max_addr
);
154 phys_addr_t
__memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
155 phys_addr_t max_addr
);
156 phys_addr_t
memblock_phys_mem_size(void);
157 phys_addr_t
memblock_start_of_DRAM(void);
158 phys_addr_t
memblock_end_of_DRAM(void);
159 void memblock_enforce_memory_limit(phys_addr_t memory_limit
);
160 int memblock_is_memory(phys_addr_t addr
);
161 int memblock_is_region_memory(phys_addr_t base
, phys_addr_t size
);
162 int memblock_is_reserved(phys_addr_t addr
);
163 int memblock_is_region_reserved(phys_addr_t base
, phys_addr_t size
);
165 extern void __memblock_dump_all(void);
167 static inline void memblock_dump_all(void)
170 __memblock_dump_all();
174 * memblock_set_current_limit - Set the current allocation limit to allow
175 * limiting allocations to what is currently
176 * accessible during boot
177 * @limit: New limit value (physical address)
179 void memblock_set_current_limit(phys_addr_t limit
);
183 * pfn conversion functions
185 * While the memory MEMBLOCKs should always be page aligned, the reserved
186 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
187 * idea of what they return for such non aligned MEMBLOCKs.
191 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
192 * @reg: memblock_region structure
194 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region
*reg
)
196 return PFN_UP(reg
->base
);
200 * memblock_region_memory_end_pfn - Return the end_pfn this region
201 * @reg: memblock_region structure
203 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region
*reg
)
205 return PFN_DOWN(reg
->base
+ reg
->size
);
209 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
210 * @reg: memblock_region structure
212 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region
*reg
)
214 return PFN_DOWN(reg
->base
);
218 * memblock_region_reserved_end_pfn - Return the end_pfn this region
219 * @reg: memblock_region structure
221 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region
*reg
)
223 return PFN_UP(reg
->base
+ reg
->size
);
226 #define for_each_memblock(memblock_type, region) \
227 for (region = memblock.memblock_type.regions; \
228 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
232 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
233 #define __init_memblock __meminit
234 #define __initdata_memblock __meminitdata
236 #define __init_memblock
237 #define __initdata_memblock
241 static inline phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
)
246 #endif /* CONFIG_HAVE_MEMBLOCK */
248 #endif /* __KERNEL__ */
250 #endif /* _LINUX_MEMBLOCK_H */