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 * @MEMBLOCK_RSRV_KERN: memory region that is reserved for kernel use,
46 * either explictitly with memblock_reserve_kern() or via memblock
47 * allocation APIs. All memblock allocations set this flag.
48 * @MEMBLOCK_KHO_SCRATCH: memory region that kexec can pass to the next
49 * kernel in handover mode. During early boot, we do not know about all
50 * memory reservations yet, so we get scratch memory from the previous
51 * kernel that we know is good to use. It is the only memory that
52 * allocations may happen from in this phase.
53 */
54 enum memblock_flags {
55 MEMBLOCK_NONE = 0x0, /* No special request */
56 MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
57 MEMBLOCK_MIRROR = 0x2, /* mirrored region */
58 MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
59 MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */
60 MEMBLOCK_RSRV_NOINIT = 0x10, /* don't initialize struct pages */
61 MEMBLOCK_RSRV_KERN = 0x20, /* memory reserved for kernel use */
62 MEMBLOCK_KHO_SCRATCH = 0x40, /* scratch memory for kexec handover */
63 };
64
65 /**
66 * struct memblock_region - represents a memory region
67 * @base: base address of the region
68 * @size: size of the region
69 * @flags: memory region attributes
70 * @nid: NUMA node id
71 */
72 struct memblock_region {
73 phys_addr_t base;
74 phys_addr_t size;
75 enum memblock_flags flags;
76 #ifdef CONFIG_NUMA
77 int nid;
78 #endif
79 };
80
81 /**
82 * struct memblock_type - collection of memory regions of certain type
83 * @cnt: number of regions
84 * @max: size of the allocated array
85 * @total_size: size of all regions
86 * @regions: array of regions
87 * @name: the memory type symbolic name
88 */
89 struct memblock_type {
90 unsigned long cnt;
91 unsigned long max;
92 phys_addr_t total_size;
93 struct memblock_region *regions;
94 char *name;
95 };
96
97 /**
98 * struct memblock - memblock allocator metadata
99 * @bottom_up: is bottom up direction?
100 * @current_limit: physical address of the current allocation limit
101 * @memory: usable memory regions
102 * @reserved: reserved memory regions
103 */
104 struct memblock {
105 bool bottom_up; /* is bottom up direction? */
106 phys_addr_t current_limit;
107 struct memblock_type memory;
108 struct memblock_type reserved;
109 };
110
111 extern struct memblock memblock;
112
113 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
114 #define __init_memblock __meminit
115 #define __initdata_memblock __meminitdata
116 void memblock_discard(void);
117 #else
118 #define __init_memblock
119 #define __initdata_memblock
memblock_discard(void)120 static inline void memblock_discard(void) {}
121 #endif
122
123 void memblock_allow_resize(void);
124 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid,
125 enum memblock_flags flags);
126 int memblock_add(phys_addr_t base, phys_addr_t size);
127 int memblock_remove(phys_addr_t base, phys_addr_t size);
128 int memblock_phys_free(phys_addr_t base, phys_addr_t size);
129 int __memblock_reserve(phys_addr_t base, phys_addr_t size, int nid,
130 enum memblock_flags flags);
131
memblock_reserve(phys_addr_t base,phys_addr_t size)132 static __always_inline int memblock_reserve(phys_addr_t base, phys_addr_t size)
133 {
134 return __memblock_reserve(base, size, NUMA_NO_NODE, 0);
135 }
136
memblock_reserve_kern(phys_addr_t base,phys_addr_t size)137 static __always_inline int memblock_reserve_kern(phys_addr_t base, phys_addr_t size)
138 {
139 return __memblock_reserve(base, size, NUMA_NO_NODE, MEMBLOCK_RSRV_KERN);
140 }
141
142 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
143 int memblock_physmem_add(phys_addr_t base, phys_addr_t size);
144 #endif
145 void memblock_trim_memory(phys_addr_t align);
146 unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
147 phys_addr_t base2, phys_addr_t size2);
148 bool memblock_overlaps_region(struct memblock_type *type,
149 phys_addr_t base, phys_addr_t size);
150 bool memblock_validate_numa_coverage(unsigned long threshold_bytes);
151 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
152 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
153 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
154 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
155 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
156 int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size);
157 int memblock_mark_kho_scratch(phys_addr_t base, phys_addr_t size);
158 int memblock_clear_kho_scratch(phys_addr_t base, phys_addr_t size);
159
160 void memblock_free(void *ptr, size_t size);
161 void reset_all_zones_managed_pages(void);
162
163 /* Low level functions */
164 void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
165 struct memblock_type *type_a,
166 struct memblock_type *type_b, phys_addr_t *out_start,
167 phys_addr_t *out_end, int *out_nid);
168
169 void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
170 struct memblock_type *type_a,
171 struct memblock_type *type_b, phys_addr_t *out_start,
172 phys_addr_t *out_end, int *out_nid);
173
174 void memblock_free_late(phys_addr_t base, phys_addr_t size);
175
176 #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)177 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
178 phys_addr_t *out_start,
179 phys_addr_t *out_end)
180 {
181 extern struct memblock_type physmem;
182
183 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
184 out_start, out_end, NULL);
185 }
186
187 /**
188 * for_each_physmem_range - iterate through physmem areas not included in type.
189 * @i: u64 used as loop variable
190 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
191 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
192 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
193 */
194 #define for_each_physmem_range(i, type, p_start, p_end) \
195 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
196 i != (u64)ULLONG_MAX; \
197 __next_physmem_range(&i, type, p_start, p_end))
198 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
199
200 /**
201 * __for_each_mem_range - iterate through memblock areas from type_a and not
202 * included in type_b. Or just type_a if type_b is NULL.
203 * @i: u64 used as loop variable
204 * @type_a: ptr to memblock_type to iterate
205 * @type_b: ptr to memblock_type which excludes from the iteration
206 * @nid: node selector, %NUMA_NO_NODE for all nodes
207 * @flags: pick from blocks based on memory attributes
208 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
209 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
210 * @p_nid: ptr to int for nid of the range, can be %NULL
211 */
212 #define __for_each_mem_range(i, type_a, type_b, nid, flags, \
213 p_start, p_end, p_nid) \
214 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
215 p_start, p_end, p_nid); \
216 i != (u64)ULLONG_MAX; \
217 __next_mem_range(&i, nid, flags, type_a, type_b, \
218 p_start, p_end, p_nid))
219
220 /**
221 * __for_each_mem_range_rev - reverse iterate through memblock areas from
222 * type_a and not included in type_b. Or just type_a if type_b is NULL.
223 * @i: u64 used as loop variable
224 * @type_a: ptr to memblock_type to iterate
225 * @type_b: ptr to memblock_type which excludes from the iteration
226 * @nid: node selector, %NUMA_NO_NODE for all nodes
227 * @flags: pick from blocks based on memory attributes
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 * @p_nid: ptr to int for nid of the range, can be %NULL
231 */
232 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
233 p_start, p_end, p_nid) \
234 for (i = (u64)ULLONG_MAX, \
235 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
236 p_start, p_end, p_nid); \
237 i != (u64)ULLONG_MAX; \
238 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
239 p_start, p_end, p_nid))
240
241 /**
242 * for_each_mem_range - iterate through memory 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 #define for_each_mem_range(i, p_start, p_end) \
248 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
249 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \
250 p_start, p_end, NULL)
251
252 /**
253 * for_each_mem_range_rev - reverse iterate through memblock areas from
254 * type_a and not included in type_b. Or just type_a if type_b is NULL.
255 * @i: u64 used as loop variable
256 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
257 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
258 */
259 #define for_each_mem_range_rev(i, p_start, p_end) \
260 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
261 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\
262 p_start, p_end, NULL)
263
264 /**
265 * for_each_reserved_mem_range - iterate over all reserved memblock areas
266 * @i: u64 used as loop variable
267 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
268 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
269 *
270 * Walks over reserved areas of memblock. Available as soon as memblock
271 * is initialized.
272 */
273 #define for_each_reserved_mem_range(i, p_start, p_end) \
274 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
275 MEMBLOCK_NONE, p_start, p_end, NULL)
276
memblock_is_hotpluggable(struct memblock_region * m)277 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
278 {
279 return m->flags & MEMBLOCK_HOTPLUG;
280 }
281
memblock_is_mirror(struct memblock_region * m)282 static inline bool memblock_is_mirror(struct memblock_region *m)
283 {
284 return m->flags & MEMBLOCK_MIRROR;
285 }
286
memblock_is_nomap(struct memblock_region * m)287 static inline bool memblock_is_nomap(struct memblock_region *m)
288 {
289 return m->flags & MEMBLOCK_NOMAP;
290 }
291
memblock_is_reserved_noinit(struct memblock_region * m)292 static inline bool memblock_is_reserved_noinit(struct memblock_region *m)
293 {
294 return m->flags & MEMBLOCK_RSRV_NOINIT;
295 }
296
memblock_is_driver_managed(struct memblock_region * m)297 static inline bool memblock_is_driver_managed(struct memblock_region *m)
298 {
299 return m->flags & MEMBLOCK_DRIVER_MANAGED;
300 }
301
memblock_is_kho_scratch(struct memblock_region * m)302 static inline bool memblock_is_kho_scratch(struct memblock_region *m)
303 {
304 return m->flags & MEMBLOCK_KHO_SCRATCH;
305 }
306
307 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
308 unsigned long *end_pfn);
309 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
310 unsigned long *out_end_pfn, int *out_nid);
311
312 /**
313 * for_each_mem_pfn_range - early memory pfn range iterator
314 * @i: an integer used as loop variable
315 * @nid: node selector, %MAX_NUMNODES for all nodes
316 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
317 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
318 * @p_nid: ptr to int for nid of the range, can be %NULL
319 *
320 * Walks over configured memory ranges.
321 */
322 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
323 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
324 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
325
326 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
327 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
328 unsigned long *out_spfn,
329 unsigned long *out_epfn);
330
331 /**
332 * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific
333 * free memblock areas from a given point
334 * @i: u64 used as loop variable
335 * @zone: zone in which all of the memory blocks reside
336 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
337 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
338 *
339 * Walks over free (memory && !reserved) areas of memblock in a specific
340 * zone, continuing from current position. Available as soon as memblock is
341 * initialized.
342 */
343 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \
344 for (; i != U64_MAX; \
345 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
346
347 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
348
349 /**
350 * for_each_free_mem_range - iterate through free memblock areas
351 * @i: u64 used as loop variable
352 * @nid: node selector, %NUMA_NO_NODE for all nodes
353 * @flags: pick from blocks based on memory attributes
354 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
355 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
356 * @p_nid: ptr to int for nid of the range, can be %NULL
357 *
358 * Walks over free (memory && !reserved) areas of memblock. Available as
359 * soon as memblock is initialized.
360 */
361 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
362 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
363 nid, flags, p_start, p_end, p_nid)
364
365 /**
366 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
367 * @i: u64 used as loop variable
368 * @nid: node selector, %NUMA_NO_NODE for all nodes
369 * @flags: pick from blocks based on memory attributes
370 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
371 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
372 * @p_nid: ptr to int for nid of the range, can be %NULL
373 *
374 * Walks over free (memory && !reserved) areas of memblock in reverse
375 * order. Available as soon as memblock is initialized.
376 */
377 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
378 p_nid) \
379 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
380 nid, flags, p_start, p_end, p_nid)
381
382 int memblock_set_node(phys_addr_t base, phys_addr_t size,
383 struct memblock_type *type, int nid);
384
385 #ifdef CONFIG_NUMA
memblock_set_region_node(struct memblock_region * r,int nid)386 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
387 {
388 r->nid = nid;
389 }
390
memblock_get_region_node(const struct memblock_region * r)391 static inline int memblock_get_region_node(const struct memblock_region *r)
392 {
393 return r->nid;
394 }
395 #else
memblock_set_region_node(struct memblock_region * r,int nid)396 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
397 {
398 }
399
memblock_get_region_node(const struct memblock_region * r)400 static inline int memblock_get_region_node(const struct memblock_region *r)
401 {
402 return 0;
403 }
404 #endif /* CONFIG_NUMA */
405
406 /* Flags for memblock allocation APIs */
407 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
408 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
409 /*
410 * MEMBLOCK_ALLOC_NOLEAKTRACE avoids kmemleak tracing. It implies
411 * MEMBLOCK_ALLOC_ACCESSIBLE
412 */
413 #define MEMBLOCK_ALLOC_NOLEAKTRACE 1
414
415 /* We are using top down, so it is safe to use 0 here */
416 #define MEMBLOCK_LOW_LIMIT 0
417
418 #ifndef ARCH_LOW_ADDRESS_LIMIT
419 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
420 #endif
421
422 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
423 phys_addr_t start, phys_addr_t end);
424 phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
425 phys_addr_t align, phys_addr_t start,
426 phys_addr_t end, int nid, bool exact_nid);
427 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
428
memblock_phys_alloc(phys_addr_t size,phys_addr_t align)429 static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
430 phys_addr_t align)
431 {
432 return memblock_phys_alloc_range(size, align, 0,
433 MEMBLOCK_ALLOC_ACCESSIBLE);
434 }
435
436 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align,
437 phys_addr_t min_addr, phys_addr_t max_addr,
438 int nid);
439 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
440 phys_addr_t min_addr, phys_addr_t max_addr,
441 int nid);
442 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
443 phys_addr_t min_addr, phys_addr_t max_addr,
444 int nid);
445
memblock_alloc(phys_addr_t size,phys_addr_t align)446 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
447 {
448 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
449 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
450 }
451
452 void *__memblock_alloc_or_panic(phys_addr_t size, phys_addr_t align,
453 const char *func);
454
455 #define memblock_alloc_or_panic(size, align) \
456 __memblock_alloc_or_panic(size, align, __func__)
457
memblock_alloc_raw(phys_addr_t size,phys_addr_t align)458 static inline void *memblock_alloc_raw(phys_addr_t size,
459 phys_addr_t align)
460 {
461 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
462 MEMBLOCK_ALLOC_ACCESSIBLE,
463 NUMA_NO_NODE);
464 }
465
memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)466 static inline void *memblock_alloc_from(phys_addr_t size,
467 phys_addr_t align,
468 phys_addr_t min_addr)
469 {
470 return memblock_alloc_try_nid(size, align, min_addr,
471 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
472 }
473
memblock_alloc_low(phys_addr_t size,phys_addr_t align)474 static inline void *memblock_alloc_low(phys_addr_t size,
475 phys_addr_t align)
476 {
477 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
478 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
479 }
480
memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)481 static inline void *memblock_alloc_node(phys_addr_t size,
482 phys_addr_t align, int nid)
483 {
484 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
485 MEMBLOCK_ALLOC_ACCESSIBLE, nid);
486 }
487
488 /*
489 * Set the allocation direction to bottom-up or top-down.
490 */
memblock_set_bottom_up(bool enable)491 static inline __init_memblock void memblock_set_bottom_up(bool enable)
492 {
493 memblock.bottom_up = enable;
494 }
495
496 /*
497 * Check if the allocation direction is bottom-up or not.
498 * if this is true, that said, memblock will allocate memory
499 * in bottom-up direction.
500 */
memblock_bottom_up(void)501 static inline __init_memblock bool memblock_bottom_up(void)
502 {
503 return memblock.bottom_up;
504 }
505
506 phys_addr_t memblock_phys_mem_size(void);
507 phys_addr_t memblock_reserved_size(void);
508 phys_addr_t memblock_reserved_kern_size(phys_addr_t limit, int nid);
509 unsigned long memblock_estimated_nr_free_pages(void);
510 phys_addr_t memblock_start_of_DRAM(void);
511 phys_addr_t memblock_end_of_DRAM(void);
512 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
513 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
514 void memblock_mem_limit_remove_map(phys_addr_t limit);
515 bool memblock_is_memory(phys_addr_t addr);
516 bool memblock_is_map_memory(phys_addr_t addr);
517 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
518 bool memblock_is_reserved(phys_addr_t addr);
519 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
520
521 void memblock_dump_all(void);
522
523 /**
524 * memblock_set_current_limit - Set the current allocation limit to allow
525 * limiting allocations to what is currently
526 * accessible during boot
527 * @limit: New limit value (physical address)
528 */
529 void memblock_set_current_limit(phys_addr_t limit);
530
531
532 phys_addr_t memblock_get_current_limit(void);
533
534 /*
535 * pfn conversion functions
536 *
537 * While the memory MEMBLOCKs should always be page aligned, the reserved
538 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
539 * idea of what they return for such non aligned MEMBLOCKs.
540 */
541
542 /**
543 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region
544 * @reg: memblock_region structure
545 *
546 * Return: the lowest pfn intersecting with the memory region
547 */
memblock_region_memory_base_pfn(const struct memblock_region * reg)548 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
549 {
550 return PFN_UP(reg->base);
551 }
552
553 /**
554 * memblock_region_memory_end_pfn - get the end pfn of the memory region
555 * @reg: memblock_region structure
556 *
557 * Return: the end_pfn of the reserved region
558 */
memblock_region_memory_end_pfn(const struct memblock_region * reg)559 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
560 {
561 return PFN_DOWN(reg->base + reg->size);
562 }
563
564 /**
565 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
566 * @reg: memblock_region structure
567 *
568 * Return: the lowest pfn intersecting with the reserved region
569 */
memblock_region_reserved_base_pfn(const struct memblock_region * reg)570 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
571 {
572 return PFN_DOWN(reg->base);
573 }
574
575 /**
576 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region
577 * @reg: memblock_region structure
578 *
579 * Return: the end_pfn of the reserved region
580 */
memblock_region_reserved_end_pfn(const struct memblock_region * reg)581 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
582 {
583 return PFN_UP(reg->base + reg->size);
584 }
585
586 /**
587 * for_each_mem_region - iterate over memory regions
588 * @region: loop variable
589 */
590 #define for_each_mem_region(region) \
591 for (region = memblock.memory.regions; \
592 region < (memblock.memory.regions + memblock.memory.cnt); \
593 region++)
594
595 /**
596 * for_each_reserved_mem_region - itereate over reserved memory regions
597 * @region: loop variable
598 */
599 #define for_each_reserved_mem_region(region) \
600 for (region = memblock.reserved.regions; \
601 region < (memblock.reserved.regions + memblock.reserved.cnt); \
602 region++)
603
604 extern void *alloc_large_system_hash(const char *tablename,
605 unsigned long bucketsize,
606 unsigned long numentries,
607 int scale,
608 int flags,
609 unsigned int *_hash_shift,
610 unsigned int *_hash_mask,
611 unsigned long low_limit,
612 unsigned long high_limit);
613
614 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
615 #define HASH_ZERO 0x00000002 /* Zero allocated hash table */
616
617 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
618 * sufficient vmalloc space.
619 */
620 #ifdef CONFIG_NUMA
621 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
622 extern int hashdist; /* Distribute hashes across NUMA nodes? */
623 #else
624 #define hashdist (0)
625 #endif
626
627 #ifdef CONFIG_MEMTEST
628 void early_memtest(phys_addr_t start, phys_addr_t end);
629 void memtest_report_meminfo(struct seq_file *m);
630 #else
early_memtest(phys_addr_t start,phys_addr_t end)631 static inline void early_memtest(phys_addr_t start, phys_addr_t end) { }
memtest_report_meminfo(struct seq_file * m)632 static inline void memtest_report_meminfo(struct seq_file *m) { }
633 #endif
634
635 #ifdef CONFIG_MEMBLOCK_KHO_SCRATCH
636 void memblock_set_kho_scratch_only(void);
637 void memblock_clear_kho_scratch_only(void);
638 void memmap_init_kho_scratch_pages(void);
639 #else
memblock_set_kho_scratch_only(void)640 static inline void memblock_set_kho_scratch_only(void) { }
memblock_clear_kho_scratch_only(void)641 static inline void memblock_clear_kho_scratch_only(void) { }
memmap_init_kho_scratch_pages(void)642 static inline void memmap_init_kho_scratch_pages(void) {}
643 #endif
644
645 #endif /* _LINUX_MEMBLOCK_H */
646