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 * @MEMBLOCK_RSRV_NOINIT: memory region for which struct pages are
44 * not initialized (only for reserved regions).
45 */
46 enum memblock_flags {
47 MEMBLOCK_NONE = 0x0, /* No special request */
48 MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
49 MEMBLOCK_MIRROR = 0x2, /* mirrored region */
50 MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
51 MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */
52 MEMBLOCK_RSRV_NOINIT = 0x10, /* don't initialize struct pages */
53 };
54
55 /**
56 * struct memblock_region - represents a memory region
57 * @base: base address of the region
58 * @size: size of the region
59 * @flags: memory region attributes
60 * @nid: NUMA node id
61 */
62 struct memblock_region {
63 phys_addr_t base;
64 phys_addr_t size;
65 enum memblock_flags flags;
66 #ifdef CONFIG_NUMA
67 int nid;
68 #endif
69 };
70
71 /**
72 * struct memblock_type - collection of memory regions of certain type
73 * @cnt: number of regions
74 * @max: size of the allocated array
75 * @total_size: size of all regions
76 * @regions: array of regions
77 * @name: the memory type symbolic name
78 */
79 struct memblock_type {
80 unsigned long cnt;
81 unsigned long max;
82 phys_addr_t total_size;
83 struct memblock_region *regions;
84 char *name;
85 };
86
87 /**
88 * struct memblock - memblock allocator metadata
89 * @bottom_up: is bottom up direction?
90 * @current_limit: physical address of the current allocation limit
91 * @memory: usable memory regions
92 * @reserved: reserved memory regions
93 */
94 struct memblock {
95 bool bottom_up; /* is bottom up direction? */
96 phys_addr_t current_limit;
97 struct memblock_type memory;
98 struct memblock_type reserved;
99 };
100
101 extern struct memblock memblock;
102
103 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
104 #define __init_memblock __meminit
105 #define __initdata_memblock __meminitdata
106 void memblock_discard(void);
107 #else
108 #define __init_memblock
109 #define __initdata_memblock
memblock_discard(void)110 static inline void memblock_discard(void) {}
111 #endif
112
113 void memblock_allow_resize(void);
114 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid,
115 enum memblock_flags flags);
116 int memblock_add(phys_addr_t base, phys_addr_t size);
117 int memblock_remove(phys_addr_t base, phys_addr_t size);
118 int memblock_phys_free(phys_addr_t base, phys_addr_t size);
119 int memblock_reserve(phys_addr_t base, phys_addr_t size);
120 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
121 int memblock_physmem_add(phys_addr_t base, phys_addr_t size);
122 #endif
123 void memblock_trim_memory(phys_addr_t align);
124 unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
125 phys_addr_t base2, phys_addr_t size2);
126 bool memblock_overlaps_region(struct memblock_type *type,
127 phys_addr_t base, phys_addr_t size);
128 bool memblock_validate_numa_coverage(unsigned long threshold_bytes);
129 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
130 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
131 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
132 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
133 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
134 int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size);
135
136 void memblock_free_all(void);
137 void memblock_free(void *ptr, size_t size);
138 void reset_all_zones_managed_pages(void);
139
140 /* Low level functions */
141 void __next_mem_range(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 __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
147 struct memblock_type *type_a,
148 struct memblock_type *type_b, phys_addr_t *out_start,
149 phys_addr_t *out_end, int *out_nid);
150
151 void memblock_free_late(phys_addr_t base, phys_addr_t size);
152
153 #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)154 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
155 phys_addr_t *out_start,
156 phys_addr_t *out_end)
157 {
158 extern struct memblock_type physmem;
159
160 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
161 out_start, out_end, NULL);
162 }
163
164 /**
165 * for_each_physmem_range - iterate through physmem areas not included in type.
166 * @i: u64 used as loop variable
167 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
168 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
169 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
170 */
171 #define for_each_physmem_range(i, type, p_start, p_end) \
172 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
173 i != (u64)ULLONG_MAX; \
174 __next_physmem_range(&i, type, p_start, p_end))
175 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
176
177 /**
178 * __for_each_mem_range - iterate through memblock areas from type_a and not
179 * included in type_b. Or just type_a if type_b is NULL.
180 * @i: u64 used as loop variable
181 * @type_a: ptr to memblock_type to iterate
182 * @type_b: ptr to memblock_type which excludes from the iteration
183 * @nid: node selector, %NUMA_NO_NODE for all nodes
184 * @flags: pick from blocks based on memory attributes
185 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
186 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
187 * @p_nid: ptr to int for nid of the range, can be %NULL
188 */
189 #define __for_each_mem_range(i, type_a, type_b, nid, flags, \
190 p_start, p_end, p_nid) \
191 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
192 p_start, p_end, p_nid); \
193 i != (u64)ULLONG_MAX; \
194 __next_mem_range(&i, nid, flags, type_a, type_b, \
195 p_start, p_end, p_nid))
196
197 /**
198 * __for_each_mem_range_rev - reverse iterate through memblock areas from
199 * type_a and not included in type_b. Or just type_a if type_b is NULL.
200 * @i: u64 used as loop variable
201 * @type_a: ptr to memblock_type to iterate
202 * @type_b: ptr to memblock_type which excludes from the iteration
203 * @nid: node selector, %NUMA_NO_NODE for all nodes
204 * @flags: pick from blocks based on memory attributes
205 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
206 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
207 * @p_nid: ptr to int for nid of the range, can be %NULL
208 */
209 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
210 p_start, p_end, p_nid) \
211 for (i = (u64)ULLONG_MAX, \
212 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
213 p_start, p_end, p_nid); \
214 i != (u64)ULLONG_MAX; \
215 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
216 p_start, p_end, p_nid))
217
218 /**
219 * for_each_mem_range - iterate through memory areas.
220 * @i: u64 used as loop variable
221 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
222 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
223 */
224 #define for_each_mem_range(i, p_start, p_end) \
225 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
226 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \
227 p_start, p_end, NULL)
228
229 /**
230 * for_each_mem_range_rev - reverse iterate through memblock areas from
231 * type_a and not included in type_b. Or just type_a if type_b is NULL.
232 * @i: u64 used as loop variable
233 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
234 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
235 */
236 #define for_each_mem_range_rev(i, p_start, p_end) \
237 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
238 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\
239 p_start, p_end, NULL)
240
241 /**
242 * for_each_reserved_mem_range - iterate over all reserved memblock areas
243 * @i: u64 used as loop variable
244 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
245 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
246 *
247 * Walks over reserved areas of memblock. Available as soon as memblock
248 * is initialized.
249 */
250 #define for_each_reserved_mem_range(i, p_start, p_end) \
251 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
252 MEMBLOCK_NONE, p_start, p_end, NULL)
253
memblock_is_hotpluggable(struct memblock_region * m)254 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
255 {
256 return m->flags & MEMBLOCK_HOTPLUG;
257 }
258
memblock_is_mirror(struct memblock_region * m)259 static inline bool memblock_is_mirror(struct memblock_region *m)
260 {
261 return m->flags & MEMBLOCK_MIRROR;
262 }
263
memblock_is_nomap(struct memblock_region * m)264 static inline bool memblock_is_nomap(struct memblock_region *m)
265 {
266 return m->flags & MEMBLOCK_NOMAP;
267 }
268
memblock_is_reserved_noinit(struct memblock_region * m)269 static inline bool memblock_is_reserved_noinit(struct memblock_region *m)
270 {
271 return m->flags & MEMBLOCK_RSRV_NOINIT;
272 }
273
memblock_is_driver_managed(struct memblock_region * m)274 static inline bool memblock_is_driver_managed(struct memblock_region *m)
275 {
276 return m->flags & MEMBLOCK_DRIVER_MANAGED;
277 }
278
279 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
280 unsigned long *end_pfn);
281 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
282 unsigned long *out_end_pfn, int *out_nid);
283
284 /**
285 * for_each_mem_pfn_range - early memory pfn range iterator
286 * @i: an integer used as loop variable
287 * @nid: node selector, %MAX_NUMNODES for all nodes
288 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
289 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
290 * @p_nid: ptr to int for nid of the range, can be %NULL
291 *
292 * Walks over configured memory ranges.
293 */
294 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
295 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
296 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
297
298 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
299 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
300 unsigned long *out_spfn,
301 unsigned long *out_epfn);
302
303 /**
304 * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific
305 * free memblock areas from a given point
306 * @i: u64 used as loop variable
307 * @zone: zone in which all of the memory blocks reside
308 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
309 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
310 *
311 * Walks over free (memory && !reserved) areas of memblock in a specific
312 * zone, continuing from current position. Available as soon as memblock is
313 * initialized.
314 */
315 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \
316 for (; i != U64_MAX; \
317 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
318
319 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
320
321 /**
322 * for_each_free_mem_range - iterate through free memblock areas
323 * @i: u64 used as loop variable
324 * @nid: node selector, %NUMA_NO_NODE for all nodes
325 * @flags: pick from blocks based on memory attributes
326 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
327 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
328 * @p_nid: ptr to int for nid of the range, can be %NULL
329 *
330 * Walks over free (memory && !reserved) areas of memblock. Available as
331 * soon as memblock is initialized.
332 */
333 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
334 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
335 nid, flags, p_start, p_end, p_nid)
336
337 /**
338 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
339 * @i: u64 used as loop variable
340 * @nid: node selector, %NUMA_NO_NODE for all nodes
341 * @flags: pick from blocks based on memory attributes
342 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
343 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
344 * @p_nid: ptr to int for nid of the range, can be %NULL
345 *
346 * Walks over free (memory && !reserved) areas of memblock in reverse
347 * order. Available as soon as memblock is initialized.
348 */
349 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
350 p_nid) \
351 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
352 nid, flags, p_start, p_end, p_nid)
353
354 int memblock_set_node(phys_addr_t base, phys_addr_t size,
355 struct memblock_type *type, int nid);
356
357 #ifdef CONFIG_NUMA
memblock_set_region_node(struct memblock_region * r,int nid)358 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
359 {
360 r->nid = nid;
361 }
362
memblock_get_region_node(const struct memblock_region * r)363 static inline int memblock_get_region_node(const struct memblock_region *r)
364 {
365 return r->nid;
366 }
367 #else
memblock_set_region_node(struct memblock_region * r,int nid)368 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
369 {
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 0;
375 }
376 #endif /* CONFIG_NUMA */
377
378 /* Flags for memblock allocation APIs */
379 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
380 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
381 #define MEMBLOCK_ALLOC_NOLEAKTRACE 1
382
383 /* We are using top down, so it is safe to use 0 here */
384 #define MEMBLOCK_LOW_LIMIT 0
385
386 #ifndef ARCH_LOW_ADDRESS_LIMIT
387 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
388 #endif
389
390 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
391 phys_addr_t start, phys_addr_t end);
392 phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
393 phys_addr_t align, phys_addr_t start,
394 phys_addr_t end, int nid, bool exact_nid);
395 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
396
memblock_phys_alloc(phys_addr_t size,phys_addr_t align)397 static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
398 phys_addr_t align)
399 {
400 return memblock_phys_alloc_range(size, align, 0,
401 MEMBLOCK_ALLOC_ACCESSIBLE);
402 }
403
404 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align,
405 phys_addr_t min_addr, phys_addr_t max_addr,
406 int nid);
407 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
408 phys_addr_t min_addr, phys_addr_t max_addr,
409 int nid);
410 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
411 phys_addr_t min_addr, phys_addr_t max_addr,
412 int nid);
413
memblock_alloc(phys_addr_t size,phys_addr_t align)414 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
415 {
416 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
417 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
418 }
419
memblock_alloc_raw(phys_addr_t size,phys_addr_t align)420 static inline void *memblock_alloc_raw(phys_addr_t size,
421 phys_addr_t align)
422 {
423 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
424 MEMBLOCK_ALLOC_ACCESSIBLE,
425 NUMA_NO_NODE);
426 }
427
memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)428 static inline void *memblock_alloc_from(phys_addr_t size,
429 phys_addr_t align,
430 phys_addr_t min_addr)
431 {
432 return memblock_alloc_try_nid(size, align, min_addr,
433 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
434 }
435
memblock_alloc_low(phys_addr_t size,phys_addr_t align)436 static inline void *memblock_alloc_low(phys_addr_t size,
437 phys_addr_t align)
438 {
439 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
440 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
441 }
442
memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)443 static inline void *memblock_alloc_node(phys_addr_t size,
444 phys_addr_t align, int nid)
445 {
446 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
447 MEMBLOCK_ALLOC_ACCESSIBLE, nid);
448 }
449
450 /*
451 * Set the allocation direction to bottom-up or top-down.
452 */
memblock_set_bottom_up(bool enable)453 static inline __init_memblock void memblock_set_bottom_up(bool enable)
454 {
455 memblock.bottom_up = enable;
456 }
457
458 /*
459 * Check if the allocation direction is bottom-up or not.
460 * if this is true, that said, memblock will allocate memory
461 * in bottom-up direction.
462 */
memblock_bottom_up(void)463 static inline __init_memblock bool memblock_bottom_up(void)
464 {
465 return memblock.bottom_up;
466 }
467
468 phys_addr_t memblock_phys_mem_size(void);
469 phys_addr_t memblock_reserved_size(void);
470 phys_addr_t memblock_start_of_DRAM(void);
471 phys_addr_t memblock_end_of_DRAM(void);
472 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
473 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
474 void memblock_mem_limit_remove_map(phys_addr_t limit);
475 bool memblock_is_memory(phys_addr_t addr);
476 bool memblock_is_map_memory(phys_addr_t addr);
477 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
478 bool memblock_is_reserved(phys_addr_t addr);
479 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
480
481 void memblock_dump_all(void);
482
483 /**
484 * memblock_set_current_limit - Set the current allocation limit to allow
485 * limiting allocations to what is currently
486 * accessible during boot
487 * @limit: New limit value (physical address)
488 */
489 void memblock_set_current_limit(phys_addr_t limit);
490
491
492 phys_addr_t memblock_get_current_limit(void);
493
494 /*
495 * pfn conversion functions
496 *
497 * While the memory MEMBLOCKs should always be page aligned, the reserved
498 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
499 * idea of what they return for such non aligned MEMBLOCKs.
500 */
501
502 /**
503 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region
504 * @reg: memblock_region structure
505 *
506 * Return: the lowest pfn intersecting with the memory region
507 */
memblock_region_memory_base_pfn(const struct memblock_region * reg)508 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
509 {
510 return PFN_UP(reg->base);
511 }
512
513 /**
514 * memblock_region_memory_end_pfn - get the end pfn of the memory region
515 * @reg: memblock_region structure
516 *
517 * Return: the end_pfn of the reserved region
518 */
memblock_region_memory_end_pfn(const struct memblock_region * reg)519 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
520 {
521 return PFN_DOWN(reg->base + reg->size);
522 }
523
524 /**
525 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
526 * @reg: memblock_region structure
527 *
528 * Return: the lowest pfn intersecting with the reserved region
529 */
memblock_region_reserved_base_pfn(const struct memblock_region * reg)530 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
531 {
532 return PFN_DOWN(reg->base);
533 }
534
535 /**
536 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region
537 * @reg: memblock_region structure
538 *
539 * Return: the end_pfn of the reserved region
540 */
memblock_region_reserved_end_pfn(const struct memblock_region * reg)541 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
542 {
543 return PFN_UP(reg->base + reg->size);
544 }
545
546 /**
547 * for_each_mem_region - iterate over memory regions
548 * @region: loop variable
549 */
550 #define for_each_mem_region(region) \
551 for (region = memblock.memory.regions; \
552 region < (memblock.memory.regions + memblock.memory.cnt); \
553 region++)
554
555 /**
556 * for_each_reserved_mem_region - itereate over reserved memory regions
557 * @region: loop variable
558 */
559 #define for_each_reserved_mem_region(region) \
560 for (region = memblock.reserved.regions; \
561 region < (memblock.reserved.regions + memblock.reserved.cnt); \
562 region++)
563
564 extern void *alloc_large_system_hash(const char *tablename,
565 unsigned long bucketsize,
566 unsigned long numentries,
567 int scale,
568 int flags,
569 unsigned int *_hash_shift,
570 unsigned int *_hash_mask,
571 unsigned long low_limit,
572 unsigned long high_limit);
573
574 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
575 #define HASH_ZERO 0x00000002 /* Zero allocated hash table */
576
577 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
578 * sufficient vmalloc space.
579 */
580 #ifdef CONFIG_NUMA
581 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
582 extern int hashdist; /* Distribute hashes across NUMA nodes? */
583 #else
584 #define hashdist (0)
585 #endif
586
587 #ifdef CONFIG_MEMTEST
588 void early_memtest(phys_addr_t start, phys_addr_t end);
589 void memtest_report_meminfo(struct seq_file *m);
590 #else
early_memtest(phys_addr_t start,phys_addr_t end)591 static inline void early_memtest(phys_addr_t start, phys_addr_t end) { }
memtest_report_meminfo(struct seq_file * m)592 static inline void memtest_report_meminfo(struct seq_file *m) { }
593 #endif
594
595
596 #endif /* _LINUX_MEMBLOCK_H */
597