1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _LINUX_MEMBLOCK_H
3 #define _LINUX_MEMBLOCK_H
4 #ifdef __KERNEL__
5
6 /*
7 * Logical memory blocks.
8 *
9 * Copyright (C) 2001 Peter Bergner, IBM Corp.
10 */
11
12 #include <linux/init.h>
13 #include <linux/mm.h>
14 #include <asm/dma.h>
15
16 extern unsigned long max_low_pfn;
17 extern unsigned long min_low_pfn;
18
19 /*
20 * highest page
21 */
22 extern unsigned long max_pfn;
23 /*
24 * highest possible page
25 */
26 extern unsigned long long max_possible_pfn;
27
28 /**
29 * enum memblock_flags - definition of memory region attributes
30 * @MEMBLOCK_NONE: no special request
31 * @MEMBLOCK_HOTPLUG: hotpluggable region
32 * @MEMBLOCK_MIRROR: mirrored region
33 * @MEMBLOCK_NOMAP: don't add to kernel direct mapping
34 */
35 enum memblock_flags {
36 MEMBLOCK_NONE = 0x0, /* No special request */
37 MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
38 MEMBLOCK_MIRROR = 0x2, /* mirrored region */
39 MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
40 };
41
42 /**
43 * struct memblock_region - represents a memory region
44 * @base: base address of the region
45 * @size: size of the region
46 * @flags: memory region attributes
47 * @nid: NUMA node id
48 */
49 struct memblock_region {
50 phys_addr_t base;
51 phys_addr_t size;
52 enum memblock_flags flags;
53 #ifdef CONFIG_NEED_MULTIPLE_NODES
54 int nid;
55 #endif
56 };
57
58 /**
59 * struct memblock_type - collection of memory regions of certain type
60 * @cnt: number of regions
61 * @max: size of the allocated array
62 * @total_size: size of all regions
63 * @regions: array of regions
64 * @name: the memory type symbolic name
65 */
66 struct memblock_type {
67 unsigned long cnt;
68 unsigned long max;
69 phys_addr_t total_size;
70 struct memblock_region *regions;
71 char *name;
72 };
73
74 /**
75 * struct memblock - memblock allocator metadata
76 * @bottom_up: is bottom up direction?
77 * @current_limit: physical address of the current allocation limit
78 * @memory: usable memory regions
79 * @reserved: reserved memory regions
80 */
81 struct memblock {
82 bool bottom_up; /* is bottom up direction? */
83 phys_addr_t current_limit;
84 struct memblock_type memory;
85 struct memblock_type reserved;
86 };
87
88 extern struct memblock memblock;
89
90 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
91 #define __init_memblock __meminit
92 #define __initdata_memblock __meminitdata
93 void memblock_discard(void);
94 #else
95 #define __init_memblock
96 #define __initdata_memblock
memblock_discard(void)97 static inline void memblock_discard(void) {}
98 #endif
99
100 phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
101 phys_addr_t size, phys_addr_t align);
102 void memblock_allow_resize(void);
103 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
104 int memblock_add(phys_addr_t base, phys_addr_t size);
105 int memblock_remove(phys_addr_t base, phys_addr_t size);
106 int memblock_free(phys_addr_t base, phys_addr_t size);
107 int memblock_reserve(phys_addr_t base, phys_addr_t size);
108 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
109 int memblock_physmem_add(phys_addr_t base, phys_addr_t size);
110 #endif
111 void memblock_trim_memory(phys_addr_t align);
112 bool memblock_overlaps_region(struct memblock_type *type,
113 phys_addr_t base, phys_addr_t size);
114 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
115 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
116 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
117 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
118 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
119
120 unsigned long memblock_free_all(void);
121 void reset_node_managed_pages(pg_data_t *pgdat);
122 void reset_all_zones_managed_pages(void);
123
124 /* Low level functions */
125 void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
126 struct memblock_type *type_a,
127 struct memblock_type *type_b, phys_addr_t *out_start,
128 phys_addr_t *out_end, int *out_nid);
129
130 void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
131 struct memblock_type *type_a,
132 struct memblock_type *type_b, phys_addr_t *out_start,
133 phys_addr_t *out_end, int *out_nid);
134
135 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
136
137 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
__next_physmem_range(u64 * idx,struct memblock_type * type,phys_addr_t * out_start,phys_addr_t * out_end)138 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
139 phys_addr_t *out_start,
140 phys_addr_t *out_end)
141 {
142 extern struct memblock_type physmem;
143
144 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
145 out_start, out_end, NULL);
146 }
147
148 /**
149 * for_each_physmem_range - iterate through physmem areas not included in type.
150 * @i: u64 used as loop variable
151 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
152 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
153 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
154 */
155 #define for_each_physmem_range(i, type, p_start, p_end) \
156 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
157 i != (u64)ULLONG_MAX; \
158 __next_physmem_range(&i, type, p_start, p_end))
159 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
160
161 /**
162 * __for_each_mem_range - iterate through memblock areas from type_a and not
163 * included in type_b. Or just type_a if type_b is NULL.
164 * @i: u64 used as loop variable
165 * @type_a: ptr to memblock_type to iterate
166 * @type_b: ptr to memblock_type which excludes from the iteration
167 * @nid: node selector, %NUMA_NO_NODE for all nodes
168 * @flags: pick from blocks based on memory attributes
169 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
170 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
171 * @p_nid: ptr to int for nid of the range, can be %NULL
172 */
173 #define __for_each_mem_range(i, type_a, type_b, nid, flags, \
174 p_start, p_end, p_nid) \
175 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
176 p_start, p_end, p_nid); \
177 i != (u64)ULLONG_MAX; \
178 __next_mem_range(&i, nid, flags, type_a, type_b, \
179 p_start, p_end, p_nid))
180
181 /**
182 * __for_each_mem_range_rev - reverse iterate through memblock areas from
183 * type_a and not included in type_b. Or just type_a if type_b is NULL.
184 * @i: u64 used as loop variable
185 * @type_a: ptr to memblock_type to iterate
186 * @type_b: ptr to memblock_type which excludes from the iteration
187 * @nid: node selector, %NUMA_NO_NODE for all nodes
188 * @flags: pick from blocks based on memory attributes
189 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
190 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
191 * @p_nid: ptr to int for nid of the range, can be %NULL
192 */
193 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
194 p_start, p_end, p_nid) \
195 for (i = (u64)ULLONG_MAX, \
196 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
197 p_start, p_end, p_nid); \
198 i != (u64)ULLONG_MAX; \
199 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
200 p_start, p_end, p_nid))
201
202 /**
203 * for_each_mem_range - iterate through memory areas.
204 * @i: u64 used as loop variable
205 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
206 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
207 */
208 #define for_each_mem_range(i, p_start, p_end) \
209 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
210 MEMBLOCK_NONE, p_start, p_end, NULL)
211
212 /**
213 * for_each_mem_range_rev - reverse iterate through memblock areas from
214 * type_a and not included in type_b. Or just type_a if type_b is NULL.
215 * @i: u64 used as loop variable
216 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
217 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
218 */
219 #define for_each_mem_range_rev(i, p_start, p_end) \
220 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
221 MEMBLOCK_NONE, p_start, p_end, NULL)
222
223 /**
224 * for_each_reserved_mem_range - iterate over all reserved memblock areas
225 * @i: u64 used as loop variable
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 *
229 * Walks over reserved areas of memblock. Available as soon as memblock
230 * is initialized.
231 */
232 #define for_each_reserved_mem_range(i, p_start, p_end) \
233 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
234 MEMBLOCK_NONE, p_start, p_end, NULL)
235
memblock_is_hotpluggable(struct memblock_region * m)236 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
237 {
238 return m->flags & MEMBLOCK_HOTPLUG;
239 }
240
memblock_is_mirror(struct memblock_region * m)241 static inline bool memblock_is_mirror(struct memblock_region *m)
242 {
243 return m->flags & MEMBLOCK_MIRROR;
244 }
245
memblock_is_nomap(struct memblock_region * m)246 static inline bool memblock_is_nomap(struct memblock_region *m)
247 {
248 return m->flags & MEMBLOCK_NOMAP;
249 }
250
251 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
252 unsigned long *end_pfn);
253 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
254 unsigned long *out_end_pfn, int *out_nid);
255
256 /**
257 * for_each_mem_pfn_range - early memory pfn range iterator
258 * @i: an integer used as loop variable
259 * @nid: node selector, %MAX_NUMNODES for all nodes
260 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
261 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
262 * @p_nid: ptr to int for nid of the range, can be %NULL
263 *
264 * Walks over configured memory ranges.
265 */
266 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
267 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
268 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
269
270 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
271 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
272 unsigned long *out_spfn,
273 unsigned long *out_epfn);
274 /**
275 * for_each_free_mem_range_in_zone - iterate through zone specific free
276 * memblock areas
277 * @i: u64 used as loop variable
278 * @zone: zone in which all of the memory blocks reside
279 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
280 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
281 *
282 * Walks over free (memory && !reserved) areas of memblock in a specific
283 * zone. Available once memblock and an empty zone is initialized. The main
284 * assumption is that the zone start, end, and pgdat have been associated.
285 * This way we can use the zone to determine NUMA node, and if a given part
286 * of the memblock is valid for the zone.
287 */
288 #define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end) \
289 for (i = 0, \
290 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end); \
291 i != U64_MAX; \
292 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
293
294 /**
295 * for_each_free_mem_range_in_zone_from - iterate through zone specific
296 * free memblock areas from a given point
297 * @i: u64 used as loop variable
298 * @zone: zone in which all of the memory blocks reside
299 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
300 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
301 *
302 * Walks over free (memory && !reserved) areas of memblock in a specific
303 * zone, continuing from current position. Available as soon as memblock is
304 * initialized.
305 */
306 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \
307 for (; i != U64_MAX; \
308 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
309
310 int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask);
311
312 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
313
314 /**
315 * for_each_free_mem_range - iterate through free memblock areas
316 * @i: u64 used as loop variable
317 * @nid: node selector, %NUMA_NO_NODE for all nodes
318 * @flags: pick from blocks based on memory attributes
319 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
320 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
321 * @p_nid: ptr to int for nid of the range, can be %NULL
322 *
323 * Walks over free (memory && !reserved) areas of memblock. Available as
324 * soon as memblock is initialized.
325 */
326 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
327 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
328 nid, flags, p_start, p_end, p_nid)
329
330 /**
331 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
332 * @i: u64 used as loop variable
333 * @nid: node selector, %NUMA_NO_NODE for all nodes
334 * @flags: pick from blocks based on memory attributes
335 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
336 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
337 * @p_nid: ptr to int for nid of the range, can be %NULL
338 *
339 * Walks over free (memory && !reserved) areas of memblock in reverse
340 * order. Available as soon as memblock is initialized.
341 */
342 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
343 p_nid) \
344 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
345 nid, flags, p_start, p_end, p_nid)
346
347 int memblock_set_node(phys_addr_t base, phys_addr_t size,
348 struct memblock_type *type, int nid);
349
350 #ifdef CONFIG_NEED_MULTIPLE_NODES
memblock_set_region_node(struct memblock_region * r,int nid)351 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
352 {
353 r->nid = nid;
354 }
355
memblock_get_region_node(const struct memblock_region * r)356 static inline int memblock_get_region_node(const struct memblock_region *r)
357 {
358 return r->nid;
359 }
360 #else
memblock_set_region_node(struct memblock_region * r,int nid)361 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
362 {
363 }
364
memblock_get_region_node(const struct memblock_region * r)365 static inline int memblock_get_region_node(const struct memblock_region *r)
366 {
367 return 0;
368 }
369 #endif /* CONFIG_NEED_MULTIPLE_NODES */
370
371 /* Flags for memblock allocation APIs */
372 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
373 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
374 #define MEMBLOCK_ALLOC_KASAN 1
375
376 /* We are using top down, so it is safe to use 0 here */
377 #define MEMBLOCK_LOW_LIMIT 0
378
379 #ifndef ARCH_LOW_ADDRESS_LIMIT
380 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
381 #endif
382
383 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
384 phys_addr_t start, phys_addr_t end);
385 phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
386 phys_addr_t align, phys_addr_t start,
387 phys_addr_t end, int nid, bool exact_nid);
388 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
389
memblock_phys_alloc(phys_addr_t size,phys_addr_t align)390 static inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
391 phys_addr_t align)
392 {
393 return memblock_phys_alloc_range(size, align, 0,
394 MEMBLOCK_ALLOC_ACCESSIBLE);
395 }
396
397 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align,
398 phys_addr_t min_addr, phys_addr_t max_addr,
399 int nid);
400 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
401 phys_addr_t min_addr, phys_addr_t max_addr,
402 int nid);
403 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
404 phys_addr_t min_addr, phys_addr_t max_addr,
405 int nid);
406
memblock_alloc(phys_addr_t size,phys_addr_t align)407 static inline void * __init memblock_alloc(phys_addr_t size, phys_addr_t align)
408 {
409 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
410 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
411 }
412
memblock_alloc_raw(phys_addr_t size,phys_addr_t align)413 static inline void * __init memblock_alloc_raw(phys_addr_t size,
414 phys_addr_t align)
415 {
416 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
417 MEMBLOCK_ALLOC_ACCESSIBLE,
418 NUMA_NO_NODE);
419 }
420
memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)421 static inline void * __init memblock_alloc_from(phys_addr_t size,
422 phys_addr_t align,
423 phys_addr_t min_addr)
424 {
425 return memblock_alloc_try_nid(size, align, min_addr,
426 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
427 }
428
memblock_alloc_low(phys_addr_t size,phys_addr_t align)429 static inline void * __init memblock_alloc_low(phys_addr_t size,
430 phys_addr_t align)
431 {
432 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
433 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
434 }
435
memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)436 static inline void * __init memblock_alloc_node(phys_addr_t size,
437 phys_addr_t align, int nid)
438 {
439 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
440 MEMBLOCK_ALLOC_ACCESSIBLE, nid);
441 }
442
memblock_free_early(phys_addr_t base,phys_addr_t size)443 static inline void __init memblock_free_early(phys_addr_t base,
444 phys_addr_t size)
445 {
446 memblock_free(base, size);
447 }
448
memblock_free_early_nid(phys_addr_t base,phys_addr_t size,int nid)449 static inline void __init memblock_free_early_nid(phys_addr_t base,
450 phys_addr_t size, int nid)
451 {
452 memblock_free(base, size);
453 }
454
memblock_free_late(phys_addr_t base,phys_addr_t size)455 static inline void __init memblock_free_late(phys_addr_t base, phys_addr_t size)
456 {
457 __memblock_free_late(base, size);
458 }
459
460 /*
461 * Set the allocation direction to bottom-up or top-down.
462 */
memblock_set_bottom_up(bool enable)463 static inline void __init memblock_set_bottom_up(bool enable)
464 {
465 memblock.bottom_up = enable;
466 }
467
468 /*
469 * Check if the allocation direction is bottom-up or not.
470 * if this is true, that said, memblock will allocate memory
471 * in bottom-up direction.
472 */
memblock_bottom_up(void)473 static inline bool memblock_bottom_up(void)
474 {
475 return memblock.bottom_up;
476 }
477
478 phys_addr_t memblock_phys_mem_size(void);
479 phys_addr_t memblock_reserved_size(void);
480 phys_addr_t memblock_start_of_DRAM(void);
481 phys_addr_t memblock_end_of_DRAM(void);
482 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
483 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
484 void memblock_mem_limit_remove_map(phys_addr_t limit);
485 bool memblock_is_memory(phys_addr_t addr);
486 bool memblock_is_map_memory(phys_addr_t addr);
487 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
488 bool memblock_is_reserved(phys_addr_t addr);
489 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
490
491 void memblock_dump_all(void);
492
493 /**
494 * memblock_set_current_limit - Set the current allocation limit to allow
495 * limiting allocations to what is currently
496 * accessible during boot
497 * @limit: New limit value (physical address)
498 */
499 void memblock_set_current_limit(phys_addr_t limit);
500
501
502 phys_addr_t memblock_get_current_limit(void);
503
504 /*
505 * pfn conversion functions
506 *
507 * While the memory MEMBLOCKs should always be page aligned, the reserved
508 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
509 * idea of what they return for such non aligned MEMBLOCKs.
510 */
511
512 /**
513 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region
514 * @reg: memblock_region structure
515 *
516 * Return: the lowest pfn intersecting with the memory region
517 */
memblock_region_memory_base_pfn(const struct memblock_region * reg)518 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
519 {
520 return PFN_UP(reg->base);
521 }
522
523 /**
524 * memblock_region_memory_end_pfn - get the end pfn of the memory region
525 * @reg: memblock_region structure
526 *
527 * Return: the end_pfn of the reserved region
528 */
memblock_region_memory_end_pfn(const struct memblock_region * reg)529 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
530 {
531 return PFN_DOWN(reg->base + reg->size);
532 }
533
534 /**
535 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
536 * @reg: memblock_region structure
537 *
538 * Return: the lowest pfn intersecting with the reserved region
539 */
memblock_region_reserved_base_pfn(const struct memblock_region * reg)540 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
541 {
542 return PFN_DOWN(reg->base);
543 }
544
545 /**
546 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region
547 * @reg: memblock_region structure
548 *
549 * Return: the end_pfn of the reserved region
550 */
memblock_region_reserved_end_pfn(const struct memblock_region * reg)551 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
552 {
553 return PFN_UP(reg->base + reg->size);
554 }
555
556 /**
557 * for_each_mem_region - itereate over memory regions
558 * @region: loop variable
559 */
560 #define for_each_mem_region(region) \
561 for (region = memblock.memory.regions; \
562 region < (memblock.memory.regions + memblock.memory.cnt); \
563 region++)
564
565 /**
566 * for_each_reserved_mem_region - itereate over reserved memory regions
567 * @region: loop variable
568 */
569 #define for_each_reserved_mem_region(region) \
570 for (region = memblock.reserved.regions; \
571 region < (memblock.reserved.regions + memblock.reserved.cnt); \
572 region++)
573
574 extern void *alloc_large_system_hash(const char *tablename,
575 unsigned long bucketsize,
576 unsigned long numentries,
577 int scale,
578 int flags,
579 unsigned int *_hash_shift,
580 unsigned int *_hash_mask,
581 unsigned long low_limit,
582 unsigned long high_limit);
583
584 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
585 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
586 * shift passed via *_hash_shift */
587 #define HASH_ZERO 0x00000004 /* Zero allocated hash table */
588
589 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
590 * sufficient vmalloc space.
591 */
592 #ifdef CONFIG_NUMA
593 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
594 extern int hashdist; /* Distribute hashes across NUMA nodes? */
595 #else
596 #define hashdist (0)
597 #endif
598
599 #ifdef CONFIG_MEMTEST
600 extern void early_memtest(phys_addr_t start, phys_addr_t end);
601 #else
early_memtest(phys_addr_t start,phys_addr_t end)602 static inline void early_memtest(phys_addr_t start, phys_addr_t end)
603 {
604 }
605 #endif
606
607 #endif /* __KERNEL__ */
608
609 #endif /* _LINUX_MEMBLOCK_H */
610
