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
21 #define INIT_PHYSMEM_REGIONS 4
23 /* Definition of memblock flags. */
25 MEMBLOCK_NONE
= 0x0, /* No special request */
26 MEMBLOCK_HOTPLUG
= 0x1, /* hotpluggable region */
27 MEMBLOCK_MIRROR
= 0x2, /* mirrored region */
28 MEMBLOCK_NOMAP
= 0x4, /* don't add to kernel direct mapping */
31 struct memblock_region
{
35 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
40 struct memblock_type
{
41 unsigned long cnt
; /* number of regions */
42 unsigned long max
; /* size of the allocated array */
43 phys_addr_t total_size
; /* size of all regions */
44 struct memblock_region
*regions
;
49 bool bottom_up
; /* is bottom up direction? */
50 phys_addr_t current_limit
;
51 struct memblock_type memory
;
52 struct memblock_type reserved
;
53 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
54 struct memblock_type physmem
;
58 extern struct memblock memblock
;
59 extern int memblock_debug
;
61 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
62 #define __init_memblock __meminit
63 #define __initdata_memblock __meminitdata
65 #define __init_memblock
66 #define __initdata_memblock
69 #define memblock_dbg(fmt, ...) \
70 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
72 phys_addr_t
memblock_find_in_range_node(phys_addr_t size
, phys_addr_t align
,
73 phys_addr_t start
, phys_addr_t end
,
74 int nid
, ulong flags
);
75 phys_addr_t
memblock_find_in_range(phys_addr_t start
, phys_addr_t end
,
76 phys_addr_t size
, phys_addr_t align
);
77 phys_addr_t
get_allocated_memblock_reserved_regions_info(phys_addr_t
*addr
);
78 phys_addr_t
get_allocated_memblock_memory_regions_info(phys_addr_t
*addr
);
79 void memblock_allow_resize(void);
80 int memblock_add_node(phys_addr_t base
, phys_addr_t size
, int nid
);
81 int memblock_add(phys_addr_t base
, phys_addr_t size
);
82 int memblock_remove(phys_addr_t base
, phys_addr_t size
);
83 int memblock_free(phys_addr_t base
, phys_addr_t size
);
84 int memblock_reserve(phys_addr_t base
, phys_addr_t size
);
85 void memblock_trim_memory(phys_addr_t align
);
86 bool memblock_overlaps_region(struct memblock_type
*type
,
87 phys_addr_t base
, phys_addr_t size
);
88 int memblock_mark_hotplug(phys_addr_t base
, phys_addr_t size
);
89 int memblock_clear_hotplug(phys_addr_t base
, phys_addr_t size
);
90 int memblock_mark_mirror(phys_addr_t base
, phys_addr_t size
);
91 int memblock_mark_nomap(phys_addr_t base
, phys_addr_t size
);
92 int memblock_clear_nomap(phys_addr_t base
, phys_addr_t size
);
93 ulong
choose_memblock_flags(void);
95 /* Low level functions */
96 int memblock_add_range(struct memblock_type
*type
,
97 phys_addr_t base
, phys_addr_t size
,
98 int nid
, unsigned long flags
);
100 void __next_mem_range(u64
*idx
, int nid
, ulong flags
,
101 struct memblock_type
*type_a
,
102 struct memblock_type
*type_b
, phys_addr_t
*out_start
,
103 phys_addr_t
*out_end
, int *out_nid
);
105 void __next_mem_range_rev(u64
*idx
, int nid
, ulong flags
,
106 struct memblock_type
*type_a
,
107 struct memblock_type
*type_b
, phys_addr_t
*out_start
,
108 phys_addr_t
*out_end
, int *out_nid
);
110 void __next_reserved_mem_region(u64
*idx
, phys_addr_t
*out_start
,
111 phys_addr_t
*out_end
);
114 * for_each_mem_range - iterate through memblock areas from type_a and not
115 * included in type_b. Or just type_a if type_b is NULL.
116 * @i: u64 used as loop variable
117 * @type_a: ptr to memblock_type to iterate
118 * @type_b: ptr to memblock_type which excludes from the iteration
119 * @nid: node selector, %NUMA_NO_NODE for all nodes
120 * @flags: pick from blocks based on memory attributes
121 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
122 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
123 * @p_nid: ptr to int for nid of the range, can be %NULL
125 #define for_each_mem_range(i, type_a, type_b, nid, flags, \
126 p_start, p_end, p_nid) \
127 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
128 p_start, p_end, p_nid); \
129 i != (u64)ULLONG_MAX; \
130 __next_mem_range(&i, nid, flags, type_a, type_b, \
131 p_start, p_end, p_nid))
134 * for_each_mem_range_rev - reverse iterate through memblock areas from
135 * type_a and not included in type_b. Or just type_a if type_b is NULL.
136 * @i: u64 used as loop variable
137 * @type_a: ptr to memblock_type to iterate
138 * @type_b: ptr to memblock_type which excludes from the iteration
139 * @nid: node selector, %NUMA_NO_NODE for all nodes
140 * @flags: pick from blocks based on memory attributes
141 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
142 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
143 * @p_nid: ptr to int for nid of the range, can be %NULL
145 #define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
146 p_start, p_end, p_nid) \
147 for (i = (u64)ULLONG_MAX, \
148 __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
149 p_start, p_end, p_nid); \
150 i != (u64)ULLONG_MAX; \
151 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
152 p_start, p_end, p_nid))
155 * for_each_reserved_mem_region - iterate over all reserved memblock areas
156 * @i: u64 used as loop variable
157 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
158 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
160 * Walks over reserved areas of memblock. Available as soon as memblock
163 #define for_each_reserved_mem_region(i, p_start, p_end) \
164 for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \
165 i != (u64)ULLONG_MAX; \
166 __next_reserved_mem_region(&i, p_start, p_end))
168 static inline bool memblock_is_hotpluggable(struct memblock_region
*m
)
170 return m
->flags
& MEMBLOCK_HOTPLUG
;
173 static inline bool memblock_is_mirror(struct memblock_region
*m
)
175 return m
->flags
& MEMBLOCK_MIRROR
;
178 static inline bool memblock_is_nomap(struct memblock_region
*m
)
180 return m
->flags
& MEMBLOCK_NOMAP
;
183 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
184 int memblock_search_pfn_nid(unsigned long pfn
, unsigned long *start_pfn
,
185 unsigned long *end_pfn
);
186 void __next_mem_pfn_range(int *idx
, int nid
, unsigned long *out_start_pfn
,
187 unsigned long *out_end_pfn
, int *out_nid
);
188 unsigned long memblock_next_valid_pfn(unsigned long pfn
, unsigned long max_pfn
);
191 * for_each_mem_pfn_range - early memory pfn range iterator
192 * @i: an integer used as loop variable
193 * @nid: node selector, %MAX_NUMNODES for all nodes
194 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
195 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
196 * @p_nid: ptr to int for nid of the range, can be %NULL
198 * Walks over configured memory ranges.
200 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
201 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
202 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
203 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
206 * for_each_free_mem_range - iterate through free memblock areas
207 * @i: u64 used as loop variable
208 * @nid: node selector, %NUMA_NO_NODE for all nodes
209 * @flags: pick from blocks based on memory attributes
210 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
211 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
212 * @p_nid: ptr to int for nid of the range, can be %NULL
214 * Walks over free (memory && !reserved) areas of memblock. Available as
215 * soon as memblock is initialized.
217 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
218 for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
219 nid, flags, p_start, p_end, p_nid)
222 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
223 * @i: u64 used as loop variable
224 * @nid: node selector, %NUMA_NO_NODE for all nodes
225 * @flags: pick from blocks based on memory attributes
226 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
227 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
228 * @p_nid: ptr to int for nid of the range, can be %NULL
230 * Walks over free (memory && !reserved) areas of memblock in reverse
231 * order. Available as soon as memblock is initialized.
233 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
235 for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
236 nid, flags, p_start, p_end, p_nid)
238 static inline void memblock_set_region_flags(struct memblock_region
*r
,
244 static inline void memblock_clear_region_flags(struct memblock_region
*r
,
250 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
251 int memblock_set_node(phys_addr_t base
, phys_addr_t size
,
252 struct memblock_type
*type
, int nid
);
254 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
259 static inline int memblock_get_region_node(const struct memblock_region
*r
)
264 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
268 static inline int memblock_get_region_node(const struct memblock_region
*r
)
272 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
274 phys_addr_t
memblock_alloc_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
275 phys_addr_t
memblock_alloc_try_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
277 phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
);
280 * Set the allocation direction to bottom-up or top-down.
282 static inline void __init
memblock_set_bottom_up(bool enable
)
284 memblock
.bottom_up
= enable
;
288 * Check if the allocation direction is bottom-up or not.
289 * if this is true, that said, memblock will allocate memory
290 * in bottom-up direction.
292 static inline bool memblock_bottom_up(void)
294 return memblock
.bottom_up
;
297 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
298 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
299 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
301 phys_addr_t __init
memblock_alloc_range(phys_addr_t size
, phys_addr_t align
,
302 phys_addr_t start
, phys_addr_t end
,
304 phys_addr_t
memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
305 phys_addr_t max_addr
);
306 phys_addr_t
__memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
307 phys_addr_t max_addr
);
308 phys_addr_t
memblock_phys_mem_size(void);
309 phys_addr_t
memblock_reserved_size(void);
310 phys_addr_t
memblock_mem_size(unsigned long limit_pfn
);
311 phys_addr_t
memblock_start_of_DRAM(void);
312 phys_addr_t
memblock_end_of_DRAM(void);
313 void memblock_enforce_memory_limit(phys_addr_t memory_limit
);
314 void memblock_cap_memory_range(phys_addr_t base
, phys_addr_t size
);
315 void memblock_mem_limit_remove_map(phys_addr_t limit
);
316 bool memblock_is_memory(phys_addr_t addr
);
317 int memblock_is_map_memory(phys_addr_t addr
);
318 int memblock_is_region_memory(phys_addr_t base
, phys_addr_t size
);
319 bool memblock_is_reserved(phys_addr_t addr
);
320 bool memblock_is_region_reserved(phys_addr_t base
, phys_addr_t size
);
322 extern void __memblock_dump_all(void);
324 static inline void memblock_dump_all(void)
327 __memblock_dump_all();
331 * memblock_set_current_limit - Set the current allocation limit to allow
332 * limiting allocations to what is currently
333 * accessible during boot
334 * @limit: New limit value (physical address)
336 void memblock_set_current_limit(phys_addr_t limit
);
339 phys_addr_t
memblock_get_current_limit(void);
342 * pfn conversion functions
344 * While the memory MEMBLOCKs should always be page aligned, the reserved
345 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
346 * idea of what they return for such non aligned MEMBLOCKs.
350 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
351 * @reg: memblock_region structure
353 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region
*reg
)
355 return PFN_UP(reg
->base
);
359 * memblock_region_memory_end_pfn - Return the end_pfn this region
360 * @reg: memblock_region structure
362 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region
*reg
)
364 return PFN_DOWN(reg
->base
+ reg
->size
);
368 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
369 * @reg: memblock_region structure
371 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region
*reg
)
373 return PFN_DOWN(reg
->base
);
377 * memblock_region_reserved_end_pfn - Return the end_pfn this region
378 * @reg: memblock_region structure
380 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region
*reg
)
382 return PFN_UP(reg
->base
+ reg
->size
);
385 #define for_each_memblock(memblock_type, region) \
386 for (region = memblock.memblock_type.regions; \
387 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
390 #define for_each_memblock_type(memblock_type, rgn) \
391 for (idx = 0, rgn = &memblock_type->regions[0]; \
392 idx < memblock_type->cnt; \
393 idx++, rgn = &memblock_type->regions[idx])
395 #ifdef CONFIG_MEMTEST
396 extern void early_memtest(phys_addr_t start
, phys_addr_t end
);
398 static inline void early_memtest(phys_addr_t start
, phys_addr_t end
)
403 extern unsigned long memblock_reserved_memory_within(phys_addr_t start_addr
,
404 phys_addr_t end_addr
);
406 static inline phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
)
411 static inline unsigned long memblock_reserved_memory_within(phys_addr_t start_addr
,
412 phys_addr_t end_addr
)
417 #endif /* CONFIG_HAVE_MEMBLOCK */
419 #endif /* __KERNEL__ */
421 #endif /* _LINUX_MEMBLOCK_H */