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