1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _LINUX_MEMBLOCK_H
3 #define _LINUX_MEMBLOCK_H
4
5 /*
6 * Logical memory blocks.
7 *
8 * Copyright (C) 2001 Peter Bergner, IBM Corp.
9 */
10
11 #include <linux/init.h>
12 #include <linux/mm.h>
13 #include <asm/dma.h>
14
15 extern unsigned long max_low_pfn;
16 extern unsigned long min_low_pfn;
17
18 /*
19 * highest page
20 */
21 extern unsigned long max_pfn;
22 /*
23 * highest possible page
24 */
25 extern unsigned long long max_possible_pfn;
26
27 /**
28 * enum memblock_flags - definition of memory region attributes
29 * @MEMBLOCK_NONE: no special request
30 * @MEMBLOCK_HOTPLUG: memory region indicated in the firmware-provided memory
31 * map during early boot as hot(un)pluggable system RAM (e.g., memory range
32 * that might get hotunplugged later). With "movable_node" set on the kernel
33 * commandline, try keeping this memory region hotunpluggable. Does not apply
34 * to memblocks added ("hotplugged") after early boot.
35 * @MEMBLOCK_MIRROR: mirrored region
36 * @MEMBLOCK_NOMAP: don't add to kernel direct mapping and treat as
37 * reserved in the memory map; refer to memblock_mark_nomap() description
38 * for further details
39 * @MEMBLOCK_DRIVER_MANAGED: memory region that is always detected and added
40 * via a driver, and never indicated in the firmware-provided memory map as
41 * system RAM. This corresponds to IORESOURCE_SYSRAM_DRIVER_MANAGED in the
42 * kernel resource tree.
43 */
44 enum memblock_flags {
45 MEMBLOCK_NONE = 0x0, /* No special request */
46 MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
47 MEMBLOCK_MIRROR = 0x2, /* mirrored region */
48 MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
49 MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */
50 };
51
52 /**
53 * struct memblock_region - represents a memory region
54 * @base: base address of the region
55 * @size: size of the region
56 * @flags: memory region attributes
57 * @nid: NUMA node id
58 */
59 struct memblock_region {
60 phys_addr_t base;
61 phys_addr_t size;
62 enum memblock_flags flags;
63 #ifdef CONFIG_NUMA
64 int nid;
65 #endif
66 };
67
68 /**
69 * struct memblock_type - collection of memory regions of certain type
70 * @cnt: number of regions
71 * @max: size of the allocated array
72 * @total_size: size of all regions
73 * @regions: array of regions
74 * @name: the memory type symbolic name
75 */
76 struct memblock_type {
77 unsigned long cnt;
78 unsigned long max;
79 phys_addr_t total_size;
80 struct memblock_region *regions;
81 char *name;
82 };
83
84 /**
85 * struct memblock - memblock allocator metadata
86 * @bottom_up: is bottom up direction?
87 * @current_limit: physical address of the current allocation limit
88 * @memory: usable memory regions
89 * @reserved: reserved memory regions
90 */
91 struct memblock {
92 bool bottom_up; /* is bottom up direction? */
93 phys_addr_t current_limit;
94 struct memblock_type memory;
95 struct memblock_type reserved;
96 };
97
98 extern struct memblock memblock;
99
100 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
101 #define __init_memblock __meminit
102 #define __initdata_memblock __meminitdata
103 void memblock_discard(void);
104 #else
105 #define __init_memblock
106 #define __initdata_memblock
memblock_discard(void)107 static inline void memblock_discard(void) {}
108 #endif
109
110 void memblock_allow_resize(void);
111 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid,
112 enum memblock_flags flags);
113 int memblock_add(phys_addr_t base, phys_addr_t size);
114 int memblock_remove(phys_addr_t base, phys_addr_t size);
115 int memblock_phys_free(phys_addr_t base, phys_addr_t size);
116 int memblock_reserve(phys_addr_t base, phys_addr_t size);
117 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
118 int memblock_physmem_add(phys_addr_t base, phys_addr_t size);
119 #endif
120 void memblock_trim_memory(phys_addr_t align);
121 unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
122 phys_addr_t base2, phys_addr_t size2);
123 bool memblock_overlaps_region(struct memblock_type *type,
124 phys_addr_t base, phys_addr_t size);
125 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
126 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
127 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
128 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
129 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
130
131 void memblock_free_all(void);
132 void memblock_free(void *ptr, size_t size);
133 void reset_all_zones_managed_pages(void);
134
135 /* Low level functions */
136 void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
137 struct memblock_type *type_a,
138 struct memblock_type *type_b, phys_addr_t *out_start,
139 phys_addr_t *out_end, int *out_nid);
140
141 void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
142 struct memblock_type *type_a,
143 struct memblock_type *type_b, phys_addr_t *out_start,
144 phys_addr_t *out_end, int *out_nid);
145
146 void memblock_free_late(phys_addr_t base, phys_addr_t size);
147
148 #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)149 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
150 phys_addr_t *out_start,
151 phys_addr_t *out_end)
152 {
153 extern struct memblock_type physmem;
154
155 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
156 out_start, out_end, NULL);
157 }
158
159 /**
160 * for_each_physmem_range - iterate through physmem areas not included in type.
161 * @i: u64 used as loop variable
162 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
163 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
164 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
165 */
166 #define for_each_physmem_range(i, type, p_start, p_end) \
167 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
168 i != (u64)ULLONG_MAX; \
169 __next_physmem_range(&i, type, p_start, p_end))
170 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
171
172 /**
173 * __for_each_mem_range - iterate through memblock areas from type_a and not
174 * included in type_b. Or just type_a if type_b is NULL.
175 * @i: u64 used as loop variable
176 * @type_a: ptr to memblock_type to iterate
177 * @type_b: ptr to memblock_type which excludes from the iteration
178 * @nid: node selector, %NUMA_NO_NODE for all nodes
179 * @flags: pick from blocks based on memory attributes
180 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
181 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
182 * @p_nid: ptr to int for nid of the range, can be %NULL
183 */
184 #define __for_each_mem_range(i, type_a, type_b, nid, flags, \
185 p_start, p_end, p_nid) \
186 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
187 p_start, p_end, p_nid); \
188 i != (u64)ULLONG_MAX; \
189 __next_mem_range(&i, nid, flags, type_a, type_b, \
190 p_start, p_end, p_nid))
191
192 /**
193 * __for_each_mem_range_rev - reverse iterate through memblock areas from
194 * type_a and not included in type_b. Or just type_a if type_b is NULL.
195 * @i: u64 used as loop variable
196 * @type_a: ptr to memblock_type to iterate
197 * @type_b: ptr to memblock_type which excludes from the iteration
198 * @nid: node selector, %NUMA_NO_NODE for all nodes
199 * @flags: pick from blocks based on memory attributes
200 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
201 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
202 * @p_nid: ptr to int for nid of the range, can be %NULL
203 */
204 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
205 p_start, p_end, p_nid) \
206 for (i = (u64)ULLONG_MAX, \
207 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
208 p_start, p_end, p_nid); \
209 i != (u64)ULLONG_MAX; \
210 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
211 p_start, p_end, p_nid))
212
213 /**
214 * for_each_mem_range - iterate through memory areas.
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(i, p_start, p_end) \
220 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
221 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \
222 p_start, p_end, NULL)
223
224 /**
225 * for_each_mem_range_rev - reverse iterate through memblock areas from
226 * type_a and not included in type_b. Or just type_a if type_b is NULL.
227 * @i: u64 used as loop variable
228 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
229 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
230 */
231 #define for_each_mem_range_rev(i, p_start, p_end) \
232 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
233 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\
234 p_start, p_end, NULL)
235
236 /**
237 * for_each_reserved_mem_range - iterate over all reserved memblock areas
238 * @i: u64 used as loop variable
239 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
240 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
241 *
242 * Walks over reserved areas of memblock. Available as soon as memblock
243 * is initialized.
244 */
245 #define for_each_reserved_mem_range(i, p_start, p_end) \
246 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
247 MEMBLOCK_NONE, p_start, p_end, NULL)
248
memblock_is_hotpluggable(struct memblock_region * m)249 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
250 {
251 return m->flags & MEMBLOCK_HOTPLUG;
252 }
253
memblock_is_mirror(struct memblock_region * m)254 static inline bool memblock_is_mirror(struct memblock_region *m)
255 {
256 return m->flags & MEMBLOCK_MIRROR;
257 }
258
memblock_is_nomap(struct memblock_region * m)259 static inline bool memblock_is_nomap(struct memblock_region *m)
260 {
261 return m->flags & MEMBLOCK_NOMAP;
262 }
263
memblock_is_driver_managed(struct memblock_region * m)264 static inline bool memblock_is_driver_managed(struct memblock_region *m)
265 {
266 return m->flags & MEMBLOCK_DRIVER_MANAGED;
267 }
268
269 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
270 unsigned long *end_pfn);
271 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
272 unsigned long *out_end_pfn, int *out_nid);
273
274 /**
275 * for_each_mem_pfn_range - early memory pfn range iterator
276 * @i: an integer used as loop variable
277 * @nid: node selector, %MAX_NUMNODES for all nodes
278 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
279 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
280 * @p_nid: ptr to int for nid of the range, can be %NULL
281 *
282 * Walks over configured memory ranges.
283 */
284 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
285 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
286 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
287
288 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
289 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
290 unsigned long *out_spfn,
291 unsigned long *out_epfn);
292 /**
293 * for_each_free_mem_pfn_range_in_zone - iterate through zone specific free
294 * memblock areas
295 * @i: u64 used as loop variable
296 * @zone: zone in which all of the memory blocks reside
297 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
298 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
299 *
300 * Walks over free (memory && !reserved) areas of memblock in a specific
301 * zone. Available once memblock and an empty zone is initialized. The main
302 * assumption is that the zone start, end, and pgdat have been associated.
303 * This way we can use the zone to determine NUMA node, and if a given part
304 * of the memblock is valid for the zone.
305 */
306 #define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end) \
307 for (i = 0, \
308 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end); \
309 i != U64_MAX; \
310 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
311
312 /**
313 * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific
314 * free memblock areas from a given point
315 * @i: u64 used as loop variable
316 * @zone: zone in which all of the memory blocks reside
317 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
318 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
319 *
320 * Walks over free (memory && !reserved) areas of memblock in a specific
321 * zone, continuing from current position. Available as soon as memblock is
322 * initialized.
323 */
324 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \
325 for (; i != U64_MAX; \
326 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
327
328 int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask);
329
330 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
331
332 /**
333 * for_each_free_mem_range - iterate through free memblock areas
334 * @i: u64 used as loop variable
335 * @nid: node selector, %NUMA_NO_NODE for all nodes
336 * @flags: pick from blocks based on memory attributes
337 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
338 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
339 * @p_nid: ptr to int for nid of the range, can be %NULL
340 *
341 * Walks over free (memory && !reserved) areas of memblock. Available as
342 * soon as memblock is initialized.
343 */
344 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
345 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
346 nid, flags, p_start, p_end, p_nid)
347
348 /**
349 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
350 * @i: u64 used as loop variable
351 * @nid: node selector, %NUMA_NO_NODE for all nodes
352 * @flags: pick from blocks based on memory attributes
353 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
354 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
355 * @p_nid: ptr to int for nid of the range, can be %NULL
356 *
357 * Walks over free (memory && !reserved) areas of memblock in reverse
358 * order. Available as soon as memblock is initialized.
359 */
360 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
361 p_nid) \
362 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
363 nid, flags, p_start, p_end, p_nid)
364
365 int memblock_set_node(phys_addr_t base, phys_addr_t size,
366 struct memblock_type *type, int nid);
367
368 #ifdef CONFIG_NUMA
memblock_set_region_node(struct memblock_region * r,int nid)369 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
370 {
371 r->nid = nid;
372 }
373
memblock_get_region_node(const struct memblock_region * r)374 static inline int memblock_get_region_node(const struct memblock_region *r)
375 {
376 return r->nid;
377 }
378 #else
memblock_set_region_node(struct memblock_region * r,int nid)379 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
380 {
381 }
382
memblock_get_region_node(const struct memblock_region * r)383 static inline int memblock_get_region_node(const struct memblock_region *r)
384 {
385 return 0;
386 }
387 #endif /* CONFIG_NUMA */
388
389 /* Flags for memblock allocation APIs */
390 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
391 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
392 #define MEMBLOCK_ALLOC_NOLEAKTRACE 1
393
394 /* We are using top down, so it is safe to use 0 here */
395 #define MEMBLOCK_LOW_LIMIT 0
396
397 #ifndef ARCH_LOW_ADDRESS_LIMIT
398 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
399 #endif
400
401 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
402 phys_addr_t start, phys_addr_t end);
403 phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
404 phys_addr_t align, phys_addr_t start,
405 phys_addr_t end, int nid, bool exact_nid);
406 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
407
memblock_phys_alloc(phys_addr_t size,phys_addr_t align)408 static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
409 phys_addr_t align)
410 {
411 return memblock_phys_alloc_range(size, align, 0,
412 MEMBLOCK_ALLOC_ACCESSIBLE);
413 }
414
415 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align,
416 phys_addr_t min_addr, phys_addr_t max_addr,
417 int nid);
418 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
419 phys_addr_t min_addr, phys_addr_t max_addr,
420 int nid);
421 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
422 phys_addr_t min_addr, phys_addr_t max_addr,
423 int nid);
424
memblock_alloc(phys_addr_t size,phys_addr_t align)425 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
426 {
427 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
428 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
429 }
430
memblock_alloc_raw(phys_addr_t size,phys_addr_t align)431 static inline void *memblock_alloc_raw(phys_addr_t size,
432 phys_addr_t align)
433 {
434 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
435 MEMBLOCK_ALLOC_ACCESSIBLE,
436 NUMA_NO_NODE);
437 }
438
memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)439 static inline void *memblock_alloc_from(phys_addr_t size,
440 phys_addr_t align,
441 phys_addr_t min_addr)
442 {
443 return memblock_alloc_try_nid(size, align, min_addr,
444 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
445 }
446
memblock_alloc_low(phys_addr_t size,phys_addr_t align)447 static inline void *memblock_alloc_low(phys_addr_t size,
448 phys_addr_t align)
449 {
450 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
451 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
452 }
453
memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)454 static inline void *memblock_alloc_node(phys_addr_t size,
455 phys_addr_t align, int nid)
456 {
457 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
458 MEMBLOCK_ALLOC_ACCESSIBLE, nid);
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_ZERO 0x00000002 /* Zero allocated hash table */
587
588 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
589 * sufficient vmalloc space.
590 */
591 #ifdef CONFIG_NUMA
592 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
593 extern int hashdist; /* Distribute hashes across NUMA nodes? */
594 #else
595 #define hashdist (0)
596 #endif
597
598 #ifdef CONFIG_MEMTEST
599 void early_memtest(phys_addr_t start, phys_addr_t end);
600 void memtest_report_meminfo(struct seq_file *m);
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) { }
memtest_report_meminfo(struct seq_file * m)603 static inline void memtest_report_meminfo(struct seq_file *m) { }
604 #endif
605
606
607 #endif /* _LINUX_MEMBLOCK_H */
608