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
);
60 void memblock_trim_memory(phys_addr_t align
);
62 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
63 int memblock_search_pfn_nid(unsigned long pfn
, unsigned long *start_pfn
,
64 unsigned long *end_pfn
);
65 void __next_mem_pfn_range(int *idx
, int nid
, unsigned long *out_start_pfn
,
66 unsigned long *out_end_pfn
, int *out_nid
);
69 * for_each_mem_pfn_range - early memory pfn range iterator
70 * @i: an integer used as loop variable
71 * @nid: node selector, %MAX_NUMNODES for all nodes
72 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
73 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
74 * @p_nid: ptr to int for nid of the range, can be %NULL
76 * Walks over configured memory ranges.
78 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
79 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
80 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
81 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
83 void __next_free_mem_range(u64
*idx
, int nid
, phys_addr_t
*out_start
,
84 phys_addr_t
*out_end
, int *out_nid
);
87 * for_each_free_mem_range - iterate through free memblock areas
88 * @i: u64 used as loop variable
89 * @nid: node selector, %MAX_NUMNODES for all nodes
90 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
91 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
92 * @p_nid: ptr to int for nid of the range, can be %NULL
94 * Walks over free (memory && !reserved) areas of memblock. Available as
95 * soon as memblock is initialized.
97 #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
99 __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
100 i != (u64)ULLONG_MAX; \
101 __next_free_mem_range(&i, nid, p_start, p_end, p_nid))
103 void __next_free_mem_range_rev(u64
*idx
, int nid
, phys_addr_t
*out_start
,
104 phys_addr_t
*out_end
, int *out_nid
);
107 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
108 * @i: u64 used as loop variable
109 * @nid: node selector, %MAX_NUMNODES for all nodes
110 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
111 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
112 * @p_nid: ptr to int for nid of the range, can be %NULL
114 * Walks over free (memory && !reserved) areas of memblock in reverse
115 * order. Available as soon as memblock is initialized.
117 #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
118 for (i = (u64)ULLONG_MAX, \
119 __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \
120 i != (u64)ULLONG_MAX; \
121 __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))
123 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
124 int memblock_set_node(phys_addr_t base
, phys_addr_t size
, int nid
);
126 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
131 static inline int memblock_get_region_node(const struct memblock_region
*r
)
136 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
140 static inline int memblock_get_region_node(const struct memblock_region
*r
)
144 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
146 phys_addr_t
memblock_alloc_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
147 phys_addr_t
memblock_alloc_try_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
149 phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
);
151 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
152 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
153 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
155 phys_addr_t
memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
156 phys_addr_t max_addr
);
157 phys_addr_t
__memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
158 phys_addr_t max_addr
);
159 phys_addr_t
memblock_phys_mem_size(void);
160 phys_addr_t
memblock_mem_size(unsigned long limit_pfn
);
161 phys_addr_t
memblock_start_of_DRAM(void);
162 phys_addr_t
memblock_end_of_DRAM(void);
163 void memblock_enforce_memory_limit(phys_addr_t memory_limit
);
164 int memblock_is_memory(phys_addr_t addr
);
165 int memblock_is_region_memory(phys_addr_t base
, phys_addr_t size
);
166 int memblock_is_reserved(phys_addr_t addr
);
167 int memblock_is_region_reserved(phys_addr_t base
, phys_addr_t size
);
169 extern void __memblock_dump_all(void);
171 static inline void memblock_dump_all(void)
174 __memblock_dump_all();
178 * memblock_set_current_limit - Set the current allocation limit to allow
179 * limiting allocations to what is currently
180 * accessible during boot
181 * @limit: New limit value (physical address)
183 void memblock_set_current_limit(phys_addr_t limit
);
187 * pfn conversion functions
189 * While the memory MEMBLOCKs should always be page aligned, the reserved
190 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
191 * idea of what they return for such non aligned MEMBLOCKs.
195 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
196 * @reg: memblock_region structure
198 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region
*reg
)
200 return PFN_UP(reg
->base
);
204 * memblock_region_memory_end_pfn - Return the end_pfn this region
205 * @reg: memblock_region structure
207 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region
*reg
)
209 return PFN_DOWN(reg
->base
+ reg
->size
);
213 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
214 * @reg: memblock_region structure
216 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region
*reg
)
218 return PFN_DOWN(reg
->base
);
222 * memblock_region_reserved_end_pfn - Return the end_pfn this region
223 * @reg: memblock_region structure
225 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region
*reg
)
227 return PFN_UP(reg
->base
+ reg
->size
);
230 #define for_each_memblock(memblock_type, region) \
231 for (region = memblock.memblock_type.regions; \
232 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
236 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
237 #define __init_memblock __meminit
238 #define __initdata_memblock __meminitdata
240 #define __init_memblock
241 #define __initdata_memblock
245 static inline phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
)
250 #endif /* CONFIG_HAVE_MEMBLOCK */
252 #endif /* __KERNEL__ */
254 #endif /* _LINUX_MEMBLOCK_H */