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
15extern unsigned long max_low_pfn;
16extern unsigned long min_low_pfn;
17
18/*
19 * highest page
20 */
21extern unsigned long max_pfn;
22/*
23 * highest possible page
24 */
25extern 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 * @MEMBLOCK_RSRV_NOINIT: reserved memory region for which struct pages are not
44 * fully initialized. Users of this flag are responsible to properly initialize
45 * struct pages of this region
46 * @MEMBLOCK_RSRV_KERN: memory region that is reserved for kernel use,
47 * either explictitly with memblock_reserve_kern() or via memblock
48 * allocation APIs. All memblock allocations set this flag.
49 * @MEMBLOCK_KHO_SCRATCH: memory region that kexec can pass to the next
50 * kernel in handover mode. During early boot, we do not know about all
51 * memory reservations yet, so we get scratch memory from the previous
52 * kernel that we know is good to use. It is the only memory that
53 * allocations may happen from in this phase.
54 */
55enum memblock_flags {
56 MEMBLOCK_NONE = 0x0, /* No special request */
57 MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
58 MEMBLOCK_MIRROR = 0x2, /* mirrored region */
59 MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
60 MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */
61 MEMBLOCK_RSRV_NOINIT = 0x10, /* don't initialize struct pages */
62 MEMBLOCK_RSRV_KERN = 0x20, /* memory reserved for kernel use */
63 MEMBLOCK_KHO_SCRATCH = 0x40, /* scratch memory for kexec handover */
64};
65
66/**
67 * struct memblock_region - represents a memory region
68 * @base: base address of the region
69 * @size: size of the region
70 * @flags: memory region attributes
71 * @nid: NUMA node id
72 */
73struct memblock_region {
74 phys_addr_t base;
75 phys_addr_t size;
76 enum memblock_flags flags;
77#ifdef CONFIG_NUMA
78 int nid;
79#endif
80};
81
82/**
83 * struct memblock_type - collection of memory regions of certain type
84 * @cnt: number of regions
85 * @max: size of the allocated array
86 * @total_size: size of all regions
87 * @regions: array of regions
88 * @name: the memory type symbolic name
89 */
90struct memblock_type {
91 unsigned long cnt;
92 unsigned long max;
93 phys_addr_t total_size;
94 struct memblock_region *regions;
95 char *name;
96};
97
98/**
99 * struct memblock - memblock allocator metadata
100 * @bottom_up: is bottom up direction?
101 * @current_limit: physical address of the current allocation limit
102 * @memory: usable memory regions
103 * @reserved: reserved memory regions
104 */
105struct memblock {
106 bool bottom_up; /* is bottom up direction? */
107 phys_addr_t current_limit;
108 struct memblock_type memory;
109 struct memblock_type reserved;
110};
111
112extern struct memblock memblock;
113
114#ifndef CONFIG_ARCH_KEEP_MEMBLOCK
115#define __init_memblock __meminit
116#define __initdata_memblock __meminitdata
117void memblock_discard(void);
118#else
119#define __init_memblock
120#define __initdata_memblock
121static inline void memblock_discard(void) {}
122#endif
123
124void memblock_allow_resize(void);
125int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid,
126 enum memblock_flags flags);
127int memblock_add(phys_addr_t base, phys_addr_t size);
128int memblock_remove(phys_addr_t base, phys_addr_t size);
129int memblock_phys_free(phys_addr_t base, phys_addr_t size);
130int __memblock_reserve(phys_addr_t base, phys_addr_t size, int nid,
131 enum memblock_flags flags);
132
133static __always_inline int memblock_reserve(phys_addr_t base, phys_addr_t size)
134{
135 return __memblock_reserve(base, size, NUMA_NO_NODE, flags: 0);
136}
137
138static __always_inline int memblock_reserve_kern(phys_addr_t base, phys_addr_t size)
139{
140 return __memblock_reserve(base, size, NUMA_NO_NODE, flags: MEMBLOCK_RSRV_KERN);
141}
142
143#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
144int memblock_physmem_add(phys_addr_t base, phys_addr_t size);
145#endif
146void memblock_trim_memory(phys_addr_t align);
147unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
148 phys_addr_t base2, phys_addr_t size2);
149bool memblock_overlaps_region(struct memblock_type *type,
150 phys_addr_t base, phys_addr_t size);
151bool memblock_validate_numa_coverage(unsigned long threshold_bytes);
152int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
153int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
154int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
155int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
156int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
157int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size);
158int memblock_mark_kho_scratch(phys_addr_t base, phys_addr_t size);
159int memblock_clear_kho_scratch(phys_addr_t base, phys_addr_t size);
160
161void memblock_free(void *ptr, size_t size);
162void reset_all_zones_managed_pages(void);
163
164/* Low level functions */
165void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
166 struct memblock_type *type_a,
167 struct memblock_type *type_b, phys_addr_t *out_start,
168 phys_addr_t *out_end, int *out_nid);
169
170void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
171 struct memblock_type *type_a,
172 struct memblock_type *type_b, phys_addr_t *out_start,
173 phys_addr_t *out_end, int *out_nid);
174
175void memblock_free_late(phys_addr_t base, phys_addr_t size);
176
177#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
178static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
179 phys_addr_t *out_start,
180 phys_addr_t *out_end)
181{
182 extern struct memblock_type physmem;
183
184 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
185 out_start, out_end, NULL);
186}
187
188/**
189 * for_each_physmem_range - iterate through physmem areas not included in type.
190 * @i: u64 used as loop variable
191 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
192 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
193 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
194 */
195#define for_each_physmem_range(i, type, p_start, p_end) \
196 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
197 i != (u64)ULLONG_MAX; \
198 __next_physmem_range(&i, type, p_start, p_end))
199#endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
200
201/**
202 * __for_each_mem_range - iterate through memblock areas from type_a and not
203 * included in type_b. Or just type_a if type_b is NULL.
204 * @i: u64 used as loop variable
205 * @type_a: ptr to memblock_type to iterate
206 * @type_b: ptr to memblock_type which excludes from the iteration
207 * @nid: node selector, %NUMA_NO_NODE for all nodes
208 * @flags: pick from blocks based on memory attributes
209 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
210 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
211 * @p_nid: ptr to int for nid of the range, can be %NULL
212 */
213#define __for_each_mem_range(i, type_a, type_b, nid, flags, \
214 p_start, p_end, p_nid) \
215 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
216 p_start, p_end, p_nid); \
217 i != (u64)ULLONG_MAX; \
218 __next_mem_range(&i, nid, flags, type_a, type_b, \
219 p_start, p_end, p_nid))
220
221/**
222 * __for_each_mem_range_rev - reverse iterate through memblock areas from
223 * type_a and not included in type_b. Or just type_a if type_b is NULL.
224 * @i: u64 used as loop variable
225 * @type_a: ptr to memblock_type to iterate
226 * @type_b: ptr to memblock_type which excludes from the iteration
227 * @nid: node selector, %NUMA_NO_NODE for all nodes
228 * @flags: pick from blocks based on memory attributes
229 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
230 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
231 * @p_nid: ptr to int for nid of the range, can be %NULL
232 */
233#define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
234 p_start, p_end, p_nid) \
235 for (i = (u64)ULLONG_MAX, \
236 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
237 p_start, p_end, p_nid); \
238 i != (u64)ULLONG_MAX; \
239 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
240 p_start, p_end, p_nid))
241
242/**
243 * for_each_mem_range - iterate through memory areas.
244 * @i: u64 used as loop variable
245 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
246 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
247 */
248#define for_each_mem_range(i, p_start, p_end) \
249 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
250 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \
251 p_start, p_end, NULL)
252
253/**
254 * for_each_mem_range_rev - reverse iterate through memblock areas from
255 * type_a and not included in type_b. Or just type_a if type_b is NULL.
256 * @i: u64 used as loop variable
257 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
258 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
259 */
260#define for_each_mem_range_rev(i, p_start, p_end) \
261 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
262 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\
263 p_start, p_end, NULL)
264
265/**
266 * for_each_reserved_mem_range - iterate over all reserved memblock areas
267 * @i: u64 used as loop variable
268 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
269 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
270 *
271 * Walks over reserved areas of memblock. Available as soon as memblock
272 * is initialized.
273 */
274#define for_each_reserved_mem_range(i, p_start, p_end) \
275 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
276 MEMBLOCK_NONE, p_start, p_end, NULL)
277
278static inline bool memblock_is_hotpluggable(struct memblock_region *m)
279{
280 return m->flags & MEMBLOCK_HOTPLUG;
281}
282
283static inline bool memblock_is_mirror(struct memblock_region *m)
284{
285 return m->flags & MEMBLOCK_MIRROR;
286}
287
288static inline bool memblock_is_nomap(struct memblock_region *m)
289{
290 return m->flags & MEMBLOCK_NOMAP;
291}
292
293static inline bool memblock_is_reserved_noinit(struct memblock_region *m)
294{
295 return m->flags & MEMBLOCK_RSRV_NOINIT;
296}
297
298static inline bool memblock_is_driver_managed(struct memblock_region *m)
299{
300 return m->flags & MEMBLOCK_DRIVER_MANAGED;
301}
302
303static inline bool memblock_is_kho_scratch(struct memblock_region *m)
304{
305 return m->flags & MEMBLOCK_KHO_SCRATCH;
306}
307
308int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
309 unsigned long *end_pfn);
310void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
311 unsigned long *out_end_pfn, int *out_nid);
312
313/**
314 * for_each_mem_pfn_range - early memory pfn range iterator
315 * @i: an integer used as loop variable
316 * @nid: node selector, %MAX_NUMNODES for all nodes
317 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
318 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
319 * @p_nid: ptr to int for nid of the range, can be %NULL
320 *
321 * Walks over configured memory ranges.
322 */
323#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
324 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
325 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
326
327
328/**
329 * for_each_free_mem_range - iterate through free memblock areas
330 * @i: u64 used as loop variable
331 * @nid: node selector, %NUMA_NO_NODE for all nodes
332 * @flags: pick from blocks based on memory attributes
333 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
334 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
335 * @p_nid: ptr to int for nid of the range, can be %NULL
336 *
337 * Walks over free (memory && !reserved) areas of memblock. Available as
338 * soon as memblock is initialized.
339 */
340#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
341 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
342 nid, flags, p_start, p_end, p_nid)
343
344/**
345 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
346 * @i: u64 used as loop variable
347 * @nid: node selector, %NUMA_NO_NODE for all nodes
348 * @flags: pick from blocks based on memory attributes
349 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
350 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
351 * @p_nid: ptr to int for nid of the range, can be %NULL
352 *
353 * Walks over free (memory && !reserved) areas of memblock in reverse
354 * order. Available as soon as memblock is initialized.
355 */
356#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
357 p_nid) \
358 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
359 nid, flags, p_start, p_end, p_nid)
360
361int memblock_set_node(phys_addr_t base, phys_addr_t size,
362 struct memblock_type *type, int nid);
363
364#ifdef CONFIG_NUMA
365static inline void memblock_set_region_node(struct memblock_region *r, int nid)
366{
367 r->nid = nid;
368}
369
370static inline int memblock_get_region_node(const struct memblock_region *r)
371{
372 return r->nid;
373}
374#else
375static inline void memblock_set_region_node(struct memblock_region *r, int nid)
376{
377}
378
379static inline int memblock_get_region_node(const struct memblock_region *r)
380{
381 return 0;
382}
383#endif /* CONFIG_NUMA */
384
385/* Flags for memblock allocation APIs */
386#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
387#define MEMBLOCK_ALLOC_ACCESSIBLE 0
388/*
389 * MEMBLOCK_ALLOC_NOLEAKTRACE avoids kmemleak tracing. It implies
390 * MEMBLOCK_ALLOC_ACCESSIBLE
391 */
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
401phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
402 phys_addr_t start, phys_addr_t end);
403phys_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);
406phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
407
408static __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, start: 0,
412 MEMBLOCK_ALLOC_ACCESSIBLE);
413}
414
415void *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);
418void *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);
421void *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
425static __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
431void *__memblock_alloc_or_panic(phys_addr_t size, phys_addr_t align,
432 const char *func);
433
434#define memblock_alloc_or_panic(size, align) \
435 __memblock_alloc_or_panic(size, align, __func__)
436
437static inline void *memblock_alloc_raw(phys_addr_t size,
438 phys_addr_t align)
439{
440 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
441 MEMBLOCK_ALLOC_ACCESSIBLE,
442 NUMA_NO_NODE);
443}
444
445static __always_inline void *memblock_alloc_from(phys_addr_t size,
446 phys_addr_t align,
447 phys_addr_t min_addr)
448{
449 return memblock_alloc_try_nid(size, align, min_addr,
450 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
451}
452
453static inline void *memblock_alloc_low(phys_addr_t size,
454 phys_addr_t align)
455{
456 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
457 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
458}
459
460static inline void *memblock_alloc_node(phys_addr_t size,
461 phys_addr_t align, int nid)
462{
463 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
464 MEMBLOCK_ALLOC_ACCESSIBLE, nid);
465}
466
467/*
468 * Set the allocation direction to bottom-up or top-down.
469 */
470static inline __init_memblock void memblock_set_bottom_up(bool enable)
471{
472 memblock.bottom_up = enable;
473}
474
475/*
476 * Check if the allocation direction is bottom-up or not.
477 * if this is true, that said, memblock will allocate memory
478 * in bottom-up direction.
479 */
480static inline __init_memblock bool memblock_bottom_up(void)
481{
482 return memblock.bottom_up;
483}
484
485phys_addr_t memblock_phys_mem_size(void);
486phys_addr_t memblock_reserved_size(void);
487phys_addr_t memblock_reserved_kern_size(phys_addr_t limit, int nid);
488unsigned long memblock_estimated_nr_free_pages(void);
489phys_addr_t memblock_start_of_DRAM(void);
490phys_addr_t memblock_end_of_DRAM(void);
491void memblock_enforce_memory_limit(phys_addr_t memory_limit);
492void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
493void memblock_mem_limit_remove_map(phys_addr_t limit);
494bool memblock_is_memory(phys_addr_t addr);
495bool memblock_is_map_memory(phys_addr_t addr);
496bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
497bool memblock_is_reserved(phys_addr_t addr);
498bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
499
500void memblock_dump_all(void);
501
502/**
503 * memblock_set_current_limit - Set the current allocation limit to allow
504 * limiting allocations to what is currently
505 * accessible during boot
506 * @limit: New limit value (physical address)
507 */
508void memblock_set_current_limit(phys_addr_t limit);
509
510
511phys_addr_t memblock_get_current_limit(void);
512
513/*
514 * pfn conversion functions
515 *
516 * While the memory MEMBLOCKs should always be page aligned, the reserved
517 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
518 * idea of what they return for such non aligned MEMBLOCKs.
519 */
520
521/**
522 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region
523 * @reg: memblock_region structure
524 *
525 * Return: the lowest pfn intersecting with the memory region
526 */
527static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
528{
529 return PFN_UP(reg->base);
530}
531
532/**
533 * memblock_region_memory_end_pfn - get the end pfn of the memory region
534 * @reg: memblock_region structure
535 *
536 * Return: the end_pfn of the reserved region
537 */
538static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
539{
540 return PFN_DOWN(reg->base + reg->size);
541}
542
543/**
544 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
545 * @reg: memblock_region structure
546 *
547 * Return: the lowest pfn intersecting with the reserved region
548 */
549static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
550{
551 return PFN_DOWN(reg->base);
552}
553
554/**
555 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region
556 * @reg: memblock_region structure
557 *
558 * Return: the end_pfn of the reserved region
559 */
560static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
561{
562 return PFN_UP(reg->base + reg->size);
563}
564
565/**
566 * for_each_mem_region - iterate over memory regions
567 * @region: loop variable
568 */
569#define for_each_mem_region(region) \
570 for (region = memblock.memory.regions; \
571 region < (memblock.memory.regions + memblock.memory.cnt); \
572 region++)
573
574/**
575 * for_each_reserved_mem_region - itereate over reserved memory regions
576 * @region: loop variable
577 */
578#define for_each_reserved_mem_region(region) \
579 for (region = memblock.reserved.regions; \
580 region < (memblock.reserved.regions + memblock.reserved.cnt); \
581 region++)
582
583extern void *alloc_large_system_hash(const char *tablename,
584 unsigned long bucketsize,
585 unsigned long numentries,
586 int scale,
587 int flags,
588 unsigned int *_hash_shift,
589 unsigned int *_hash_mask,
590 unsigned long low_limit,
591 unsigned long high_limit);
592
593#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
594#define HASH_ZERO 0x00000002 /* Zero allocated hash table */
595
596/* Only NUMA needs hash distribution. 64bit NUMA architectures have
597 * sufficient vmalloc space.
598 */
599#ifdef CONFIG_NUMA
600#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
601extern int hashdist; /* Distribute hashes across NUMA nodes? */
602#else
603#define hashdist (0)
604#endif
605
606#ifdef CONFIG_MEMTEST
607void early_memtest(phys_addr_t start, phys_addr_t end);
608void memtest_report_meminfo(struct seq_file *m);
609#else
610static inline void early_memtest(phys_addr_t start, phys_addr_t end) { }
611static inline void memtest_report_meminfo(struct seq_file *m) { }
612#endif
613
614#ifdef CONFIG_MEMBLOCK_KHO_SCRATCH
615void memblock_set_kho_scratch_only(void);
616void memblock_clear_kho_scratch_only(void);
617void memmap_init_kho_scratch_pages(void);
618#else
619static inline void memblock_set_kho_scratch_only(void) { }
620static inline void memblock_clear_kho_scratch_only(void) { }
621static inline void memmap_init_kho_scratch_pages(void) {}
622#endif
623
624#endif /* _LINUX_MEMBLOCK_H */
625