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 and treat as
34 * reserved in the memory map; refer to memblock_mark_nomap() description
35 * for further details
36 */
37 enum memblock_flags {
38 MEMBLOCK_NONE = 0x0, /* No special request */
39 MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
40 MEMBLOCK_MIRROR = 0x2, /* mirrored region */
41 MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
42 };
43
44 /**
45 * struct memblock_region - represents a memory region
46 * @base: base address of the region
47 * @size: size of the region
48 * @flags: memory region attributes
49 * @nid: NUMA node id
50 */
51 struct memblock_region {
52 phys_addr_t base;
53 phys_addr_t size;
54 enum memblock_flags flags;
55 #ifdef CONFIG_NUMA
56 int nid;
57 #endif
58 };
59
60 /**
61 * struct memblock_type - collection of memory regions of certain type
62 * @cnt: number of regions
63 * @max: size of the allocated array
64 * @total_size: size of all regions
65 * @regions: array of regions
66 * @name: the memory type symbolic name
67 */
68 struct memblock_type {
69 unsigned long cnt;
70 unsigned long max;
71 phys_addr_t total_size;
72 struct memblock_region *regions;
73 char *name;
74 };
75
76 /**
77 * struct memblock - memblock allocator metadata
78 * @bottom_up: is bottom up direction?
79 * @current_limit: physical address of the current allocation limit
80 * @memory: usable memory regions
81 * @reserved: reserved memory regions
82 */
83 struct memblock {
84 bool bottom_up; /* is bottom up direction? */
85 phys_addr_t current_limit;
86 struct memblock_type memory;
87 struct memblock_type reserved;
88 };
89
90 extern struct memblock memblock;
91
92 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
93 #define __init_memblock __meminit
94 #define __initdata_memblock __meminitdata
95 void memblock_discard(void);
96 #else
97 #define __init_memblock
98 #define __initdata_memblock
memblock_discard(void)99 static inline void memblock_discard(void) {}
100 #endif
101
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 void memblock_free_all(void);
121 void memblock_free_ptr(void *ptr, size_t size);
122 void reset_node_managed_pages(pg_data_t *pgdat);
123 void reset_all_zones_managed_pages(void);
124
125 /* Low level functions */
126 void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
127 struct memblock_type *type_a,
128 struct memblock_type *type_b, phys_addr_t *out_start,
129 phys_addr_t *out_end, int *out_nid);
130
131 void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
132 struct memblock_type *type_a,
133 struct memblock_type *type_b, phys_addr_t *out_start,
134 phys_addr_t *out_end, int *out_nid);
135
136 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
137
138 #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)139 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
140 phys_addr_t *out_start,
141 phys_addr_t *out_end)
142 {
143 extern struct memblock_type physmem;
144
145 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
146 out_start, out_end, NULL);
147 }
148
149 /**
150 * for_each_physmem_range - iterate through physmem areas not included in type.
151 * @i: u64 used as loop variable
152 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
153 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
154 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
155 */
156 #define for_each_physmem_range(i, type, p_start, p_end) \
157 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
158 i != (u64)ULLONG_MAX; \
159 __next_physmem_range(&i, type, p_start, p_end))
160 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
161
162 /**
163 * __for_each_mem_range - iterate through memblock areas from type_a and not
164 * included in type_b. Or just type_a if type_b is NULL.
165 * @i: u64 used as loop variable
166 * @type_a: ptr to memblock_type to iterate
167 * @type_b: ptr to memblock_type which excludes from the iteration
168 * @nid: node selector, %NUMA_NO_NODE for all nodes
169 * @flags: pick from blocks based on memory attributes
170 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
171 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
172 * @p_nid: ptr to int for nid of the range, can be %NULL
173 */
174 #define __for_each_mem_range(i, type_a, type_b, nid, flags, \
175 p_start, p_end, p_nid) \
176 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
177 p_start, p_end, p_nid); \
178 i != (u64)ULLONG_MAX; \
179 __next_mem_range(&i, nid, flags, type_a, type_b, \
180 p_start, p_end, p_nid))
181
182 /**
183 * __for_each_mem_range_rev - reverse iterate through memblock areas from
184 * type_a and not included in type_b. Or just type_a if type_b is NULL.
185 * @i: u64 used as loop variable
186 * @type_a: ptr to memblock_type to iterate
187 * @type_b: ptr to memblock_type which excludes from the iteration
188 * @nid: node selector, %NUMA_NO_NODE for all nodes
189 * @flags: pick from blocks based on memory attributes
190 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
191 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
192 * @p_nid: ptr to int for nid of the range, can be %NULL
193 */
194 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
195 p_start, p_end, p_nid) \
196 for (i = (u64)ULLONG_MAX, \
197 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
198 p_start, p_end, p_nid); \
199 i != (u64)ULLONG_MAX; \
200 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
201 p_start, p_end, p_nid))
202
203 /**
204 * for_each_mem_range - iterate through memory areas.
205 * @i: u64 used as loop variable
206 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
207 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
208 */
209 #define for_each_mem_range(i, p_start, p_end) \
210 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
211 MEMBLOCK_HOTPLUG, p_start, p_end, NULL)
212
213 /**
214 * for_each_mem_range_rev - reverse iterate through memblock areas from
215 * type_a and not included in type_b. Or just type_a if type_b is NULL.
216 * @i: u64 used as loop variable
217 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
218 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
219 */
220 #define for_each_mem_range_rev(i, p_start, p_end) \
221 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
222 MEMBLOCK_HOTPLUG, p_start, p_end, NULL)
223
224 /**
225 * for_each_reserved_mem_range - iterate over all reserved memblock areas
226 * @i: u64 used as loop variable
227 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
228 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
229 *
230 * Walks over reserved areas of memblock. Available as soon as memblock
231 * is initialized.
232 */
233 #define for_each_reserved_mem_range(i, p_start, p_end) \
234 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
235 MEMBLOCK_NONE, p_start, p_end, NULL)
236
memblock_is_hotpluggable(struct memblock_region * m)237 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
238 {
239 return m->flags & MEMBLOCK_HOTPLUG;
240 }
241
memblock_is_mirror(struct memblock_region * m)242 static inline bool memblock_is_mirror(struct memblock_region *m)
243 {
244 return m->flags & MEMBLOCK_MIRROR;
245 }
246
memblock_is_nomap(struct memblock_region * m)247 static inline bool memblock_is_nomap(struct memblock_region *m)
248 {
249 return m->flags & MEMBLOCK_NOMAP;
250 }
251
252 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
253 unsigned long *end_pfn);
254 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
255 unsigned long *out_end_pfn, int *out_nid);
256
257 /**
258 * for_each_mem_pfn_range - early memory pfn range iterator
259 * @i: an integer used as loop variable
260 * @nid: node selector, %MAX_NUMNODES for all nodes
261 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
262 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
263 * @p_nid: ptr to int for nid of the range, can be %NULL
264 *
265 * Walks over configured memory ranges.
266 */
267 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
268 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
269 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
270
271 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
272 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
273 unsigned long *out_spfn,
274 unsigned long *out_epfn);
275 /**
276 * for_each_free_mem_pfn_range_in_zone - iterate through zone specific free
277 * memblock areas
278 * @i: u64 used as loop variable
279 * @zone: zone in which all of the memory blocks reside
280 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
281 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
282 *
283 * Walks over free (memory && !reserved) areas of memblock in a specific
284 * zone. Available once memblock and an empty zone is initialized. The main
285 * assumption is that the zone start, end, and pgdat have been associated.
286 * This way we can use the zone to determine NUMA node, and if a given part
287 * of the memblock is valid for the zone.
288 */
289 #define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end) \
290 for (i = 0, \
291 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end); \
292 i != U64_MAX; \
293 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
294
295 /**
296 * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific
297 * free memblock areas from a given point
298 * @i: u64 used as loop variable
299 * @zone: zone in which all of the memory blocks reside
300 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
301 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
302 *
303 * Walks over free (memory && !reserved) areas of memblock in a specific
304 * zone, continuing from current position. Available as soon as memblock is
305 * initialized.
306 */
307 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \
308 for (; i != U64_MAX; \
309 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
310
311 int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask);
312
313 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
314
315 /**
316 * for_each_free_mem_range - iterate through free memblock areas
317 * @i: u64 used as loop variable
318 * @nid: node selector, %NUMA_NO_NODE for all nodes
319 * @flags: pick from blocks based on memory attributes
320 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
321 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
322 * @p_nid: ptr to int for nid of the range, can be %NULL
323 *
324 * Walks over free (memory && !reserved) areas of memblock. Available as
325 * soon as memblock is initialized.
326 */
327 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
328 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
329 nid, flags, p_start, p_end, p_nid)
330
331 /**
332 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
333 * @i: u64 used as loop variable
334 * @nid: node selector, %NUMA_NO_NODE for all nodes
335 * @flags: pick from blocks based on memory attributes
336 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
337 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
338 * @p_nid: ptr to int for nid of the range, can be %NULL
339 *
340 * Walks over free (memory && !reserved) areas of memblock in reverse
341 * order. Available as soon as memblock is initialized.
342 */
343 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
344 p_nid) \
345 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
346 nid, flags, p_start, p_end, p_nid)
347
348 int memblock_set_node(phys_addr_t base, phys_addr_t size,
349 struct memblock_type *type, int nid);
350
351 #ifdef CONFIG_NUMA
memblock_set_region_node(struct memblock_region * r,int nid)352 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
353 {
354 r->nid = nid;
355 }
356
memblock_get_region_node(const struct memblock_region * r)357 static inline int memblock_get_region_node(const struct memblock_region *r)
358 {
359 return r->nid;
360 }
361 #else
memblock_set_region_node(struct memblock_region * r,int nid)362 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
363 {
364 }
365
memblock_get_region_node(const struct memblock_region * r)366 static inline int memblock_get_region_node(const struct memblock_region *r)
367 {
368 return 0;
369 }
370 #endif /* CONFIG_NUMA */
371
372 /* Flags for memblock allocation APIs */
373 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
374 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
375 #define MEMBLOCK_ALLOC_KASAN 1
376
377 /* We are using top down, so it is safe to use 0 here */
378 #define MEMBLOCK_LOW_LIMIT 0
379
380 #ifndef ARCH_LOW_ADDRESS_LIMIT
381 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
382 #endif
383
384 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
385 phys_addr_t start, phys_addr_t end);
386 phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
387 phys_addr_t align, phys_addr_t start,
388 phys_addr_t end, int nid, bool exact_nid);
389 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
390
memblock_phys_alloc(phys_addr_t size,phys_addr_t align)391 static inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
392 phys_addr_t align)
393 {
394 return memblock_phys_alloc_range(size, align, 0,
395 MEMBLOCK_ALLOC_ACCESSIBLE);
396 }
397
398 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align,
399 phys_addr_t min_addr, phys_addr_t max_addr,
400 int nid);
401 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
402 phys_addr_t min_addr, phys_addr_t max_addr,
403 int nid);
404 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
405 phys_addr_t min_addr, phys_addr_t max_addr,
406 int nid);
407
memblock_alloc(phys_addr_t size,phys_addr_t align)408 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
409 {
410 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
411 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
412 }
413
memblock_alloc_raw(phys_addr_t size,phys_addr_t align)414 static inline void *memblock_alloc_raw(phys_addr_t size,
415 phys_addr_t align)
416 {
417 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
418 MEMBLOCK_ALLOC_ACCESSIBLE,
419 NUMA_NO_NODE);
420 }
421
memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)422 static inline void *memblock_alloc_from(phys_addr_t size,
423 phys_addr_t align,
424 phys_addr_t min_addr)
425 {
426 return memblock_alloc_try_nid(size, align, min_addr,
427 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
428 }
429
memblock_alloc_low(phys_addr_t size,phys_addr_t align)430 static inline void *memblock_alloc_low(phys_addr_t size,
431 phys_addr_t align)
432 {
433 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
434 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
435 }
436
memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)437 static inline void *memblock_alloc_node(phys_addr_t size,
438 phys_addr_t align, int nid)
439 {
440 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
441 MEMBLOCK_ALLOC_ACCESSIBLE, nid);
442 }
443
memblock_free_early(phys_addr_t base,phys_addr_t size)444 static inline void memblock_free_early(phys_addr_t base,
445 phys_addr_t size)
446 {
447 memblock_free(base, size);
448 }
449
memblock_free_early_nid(phys_addr_t base,phys_addr_t size,int nid)450 static inline void memblock_free_early_nid(phys_addr_t base,
451 phys_addr_t size, int nid)
452 {
453 memblock_free(base, size);
454 }
455
memblock_free_late(phys_addr_t base,phys_addr_t size)456 static inline void memblock_free_late(phys_addr_t base, phys_addr_t size)
457 {
458 __memblock_free_late(base, size);
459 }
460
461 /*
462 * Set the allocation direction to bottom-up or top-down.
463 */
memblock_set_bottom_up(bool enable)464 static inline __init_memblock void memblock_set_bottom_up(bool enable)
465 {
466 memblock.bottom_up = enable;
467 }
468
469 /*
470 * Check if the allocation direction is bottom-up or not.
471 * if this is true, that said, memblock will allocate memory
472 * in bottom-up direction.
473 */
memblock_bottom_up(void)474 static inline __init_memblock bool memblock_bottom_up(void)
475 {
476 return memblock.bottom_up;
477 }
478
479 phys_addr_t memblock_phys_mem_size(void);
480 phys_addr_t memblock_reserved_size(void);
481 phys_addr_t memblock_start_of_DRAM(void);
482 phys_addr_t memblock_end_of_DRAM(void);
483 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
484 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
485 void memblock_mem_limit_remove_map(phys_addr_t limit);
486 bool memblock_is_memory(phys_addr_t addr);
487 bool memblock_is_map_memory(phys_addr_t addr);
488 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
489 bool memblock_is_reserved(phys_addr_t addr);
490 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
491
492 void memblock_dump_all(void);
493
494 /**
495 * memblock_set_current_limit - Set the current allocation limit to allow
496 * limiting allocations to what is currently
497 * accessible during boot
498 * @limit: New limit value (physical address)
499 */
500 void memblock_set_current_limit(phys_addr_t limit);
501
502
503 phys_addr_t memblock_get_current_limit(void);
504
505 /*
506 * pfn conversion functions
507 *
508 * While the memory MEMBLOCKs should always be page aligned, the reserved
509 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
510 * idea of what they return for such non aligned MEMBLOCKs.
511 */
512
513 /**
514 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region
515 * @reg: memblock_region structure
516 *
517 * Return: the lowest pfn intersecting with the memory region
518 */
memblock_region_memory_base_pfn(const struct memblock_region * reg)519 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
520 {
521 return PFN_UP(reg->base);
522 }
523
524 /**
525 * memblock_region_memory_end_pfn - get the end pfn of the memory region
526 * @reg: memblock_region structure
527 *
528 * Return: the end_pfn of the reserved region
529 */
memblock_region_memory_end_pfn(const struct memblock_region * reg)530 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
531 {
532 return PFN_DOWN(reg->base + reg->size);
533 }
534
535 /**
536 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
537 * @reg: memblock_region structure
538 *
539 * Return: the lowest pfn intersecting with the reserved region
540 */
memblock_region_reserved_base_pfn(const struct memblock_region * reg)541 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
542 {
543 return PFN_DOWN(reg->base);
544 }
545
546 /**
547 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region
548 * @reg: memblock_region structure
549 *
550 * Return: the end_pfn of the reserved region
551 */
memblock_region_reserved_end_pfn(const struct memblock_region * reg)552 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
553 {
554 return PFN_UP(reg->base + reg->size);
555 }
556
557 /**
558 * for_each_mem_region - itereate over memory regions
559 * @region: loop variable
560 */
561 #define for_each_mem_region(region) \
562 for (region = memblock.memory.regions; \
563 region < (memblock.memory.regions + memblock.memory.cnt); \
564 region++)
565
566 /**
567 * for_each_reserved_mem_region - itereate over reserved memory regions
568 * @region: loop variable
569 */
570 #define for_each_reserved_mem_region(region) \
571 for (region = memblock.reserved.regions; \
572 region < (memblock.reserved.regions + memblock.reserved.cnt); \
573 region++)
574
575 extern void *alloc_large_system_hash(const char *tablename,
576 unsigned long bucketsize,
577 unsigned long numentries,
578 int scale,
579 int flags,
580 unsigned int *_hash_shift,
581 unsigned int *_hash_mask,
582 unsigned long low_limit,
583 unsigned long high_limit);
584
585 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
586 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
587 * shift passed via *_hash_shift */
588 #define HASH_ZERO 0x00000004 /* Zero allocated hash table */
589
590 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
591 * sufficient vmalloc space.
592 */
593 #ifdef CONFIG_NUMA
594 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
595 extern int hashdist; /* Distribute hashes across NUMA nodes? */
596 #else
597 #define hashdist (0)
598 #endif
599
600 #ifdef CONFIG_MEMTEST
601 extern void early_memtest(phys_addr_t start, phys_addr_t end);
602 #else
early_memtest(phys_addr_t start,phys_addr_t end)603 static inline void early_memtest(phys_addr_t start, phys_addr_t end)
604 {
605 }
606 #endif
607
608 #endif /* __KERNEL__ */
609
610 #endif /* _LINUX_MEMBLOCK_H */
611
