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: 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 */
55 enum 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 */
73 struct 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 */
90 struct 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 */
105 struct 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
112 extern struct memblock memblock;
113
114 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
115 #define __init_memblock __meminit
116 #define __initdata_memblock __meminitdata
117 void memblock_discard(void);
118 #else
119 #define __init_memblock
120 #define __initdata_memblock
memblock_discard(void)121 static inline void memblock_discard(void) {}
122 #endif
123
124 void memblock_allow_resize(void);
125 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid,
126 enum memblock_flags flags);
127 int memblock_add(phys_addr_t base, phys_addr_t size);
128 int memblock_remove(phys_addr_t base, phys_addr_t size);
129 int memblock_phys_free(phys_addr_t base, phys_addr_t size);
130 int __memblock_reserve(phys_addr_t base, phys_addr_t size, int nid,
131 enum memblock_flags flags);
132
memblock_reserve(phys_addr_t base,phys_addr_t size)133 static __always_inline int memblock_reserve(phys_addr_t base, phys_addr_t size)
134 {
135 return __memblock_reserve(base, size, NUMA_NO_NODE, 0);
136 }
137
memblock_reserve_kern(phys_addr_t base,phys_addr_t size)138 static __always_inline int memblock_reserve_kern(phys_addr_t base, phys_addr_t size)
139 {
140 return __memblock_reserve(base, size, NUMA_NO_NODE, MEMBLOCK_RSRV_KERN);
141 }
142
143 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
144 int memblock_physmem_add(phys_addr_t base, phys_addr_t size);
145 #endif
146 void memblock_trim_memory(phys_addr_t align);
147 unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
148 phys_addr_t base2, phys_addr_t size2);
149 bool memblock_overlaps_region(struct memblock_type *type,
150 phys_addr_t base, phys_addr_t size);
151 bool memblock_validate_numa_coverage(unsigned long threshold_bytes);
152 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
153 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
154 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
155 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
156 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
157 int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size);
158 int memblock_reserved_mark_kern(phys_addr_t base, phys_addr_t size);
159 int memblock_mark_kho_scratch(phys_addr_t base, phys_addr_t size);
160 int memblock_clear_kho_scratch(phys_addr_t base, phys_addr_t size);
161
162 void memblock_free(void *ptr, size_t size);
163 void reset_all_zones_managed_pages(void);
164
165 /* Low level functions */
166 void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
167 struct memblock_type *type_a,
168 struct memblock_type *type_b, phys_addr_t *out_start,
169 phys_addr_t *out_end, int *out_nid);
170
171 void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
172 struct memblock_type *type_a,
173 struct memblock_type *type_b, phys_addr_t *out_start,
174 phys_addr_t *out_end, int *out_nid);
175
176 void memblock_free_late(phys_addr_t base, phys_addr_t size);
177
178 #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)179 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
180 phys_addr_t *out_start,
181 phys_addr_t *out_end)
182 {
183 extern struct memblock_type physmem;
184
185 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
186 out_start, out_end, NULL);
187 }
188
189 /**
190 * for_each_physmem_range - iterate through physmem areas not included in type.
191 * @i: u64 used as loop variable
192 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
193 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
194 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
195 */
196 #define for_each_physmem_range(i, type, p_start, p_end) \
197 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \
198 i != (u64)ULLONG_MAX; \
199 __next_physmem_range(&i, type, p_start, p_end))
200 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
201
202 /**
203 * __for_each_mem_range - iterate through memblock areas from type_a and not
204 * included in type_b. Or just type_a if type_b is NULL.
205 * @i: u64 used as loop variable
206 * @type_a: ptr to memblock_type to iterate
207 * @type_b: ptr to memblock_type which excludes from the iteration
208 * @nid: node selector, %NUMA_NO_NODE for all nodes
209 * @flags: pick from blocks based on memory attributes
210 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
211 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
212 * @p_nid: ptr to int for nid of the range, can be %NULL
213 */
214 #define __for_each_mem_range(i, type_a, type_b, nid, flags, \
215 p_start, p_end, p_nid) \
216 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
217 p_start, p_end, p_nid); \
218 i != (u64)ULLONG_MAX; \
219 __next_mem_range(&i, nid, flags, type_a, type_b, \
220 p_start, p_end, p_nid))
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 * @type_a: ptr to memblock_type to iterate
227 * @type_b: ptr to memblock_type which excludes from the iteration
228 * @nid: node selector, %NUMA_NO_NODE for all nodes
229 * @flags: pick from blocks based on memory attributes
230 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
231 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
232 * @p_nid: ptr to int for nid of the range, can be %NULL
233 */
234 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
235 p_start, p_end, p_nid) \
236 for (i = (u64)ULLONG_MAX, \
237 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
238 p_start, p_end, p_nid); \
239 i != (u64)ULLONG_MAX; \
240 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
241 p_start, p_end, p_nid))
242
243 /**
244 * for_each_mem_range - iterate through memory areas.
245 * @i: u64 used as loop variable
246 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
247 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
248 */
249 #define for_each_mem_range(i, p_start, p_end) \
250 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \
251 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \
252 p_start, p_end, NULL)
253
254 /**
255 * for_each_mem_range_rev - reverse iterate through memblock areas from
256 * type_a and not included in type_b. Or just type_a if type_b is NULL.
257 * @i: u64 used as loop variable
258 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
259 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
260 */
261 #define for_each_mem_range_rev(i, p_start, p_end) \
262 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
263 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\
264 p_start, p_end, NULL)
265
266 /**
267 * for_each_reserved_mem_range - iterate over all reserved memblock areas
268 * @i: u64 used as loop variable
269 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
270 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
271 *
272 * Walks over reserved areas of memblock. Available as soon as memblock
273 * is initialized.
274 */
275 #define for_each_reserved_mem_range(i, p_start, p_end) \
276 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \
277 MEMBLOCK_NONE, p_start, p_end, NULL)
278
memblock_is_hotpluggable(struct memblock_region * m)279 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
280 {
281 return m->flags & MEMBLOCK_HOTPLUG;
282 }
283
memblock_is_mirror(struct memblock_region * m)284 static inline bool memblock_is_mirror(struct memblock_region *m)
285 {
286 return m->flags & MEMBLOCK_MIRROR;
287 }
288
memblock_is_nomap(struct memblock_region * m)289 static inline bool memblock_is_nomap(struct memblock_region *m)
290 {
291 return m->flags & MEMBLOCK_NOMAP;
292 }
293
memblock_is_reserved_noinit(struct memblock_region * m)294 static inline bool memblock_is_reserved_noinit(struct memblock_region *m)
295 {
296 return m->flags & MEMBLOCK_RSRV_NOINIT;
297 }
298
memblock_is_driver_managed(struct memblock_region * m)299 static inline bool memblock_is_driver_managed(struct memblock_region *m)
300 {
301 return m->flags & MEMBLOCK_DRIVER_MANAGED;
302 }
303
memblock_is_kho_scratch(struct memblock_region * m)304 static inline bool memblock_is_kho_scratch(struct memblock_region *m)
305 {
306 return m->flags & MEMBLOCK_KHO_SCRATCH;
307 }
308
309 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
310 unsigned long *end_pfn);
311 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
312 unsigned long *out_end_pfn, int *out_nid);
313
314 /**
315 * for_each_mem_pfn_range - early memory pfn range iterator
316 * @i: an integer used as loop variable
317 * @nid: node selector, %MAX_NUMNODES for all nodes
318 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
319 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
320 * @p_nid: ptr to int for nid of the range, can be %NULL
321 *
322 * Walks over configured memory ranges.
323 */
324 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
325 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
326 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
327
328
329 /**
330 * for_each_free_mem_range - iterate through free memblock areas
331 * @i: u64 used as loop variable
332 * @nid: node selector, %NUMA_NO_NODE for all nodes
333 * @flags: pick from blocks based on memory attributes
334 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
335 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
336 * @p_nid: ptr to int for nid of the range, can be %NULL
337 *
338 * Walks over free (memory && !reserved) areas of memblock. Available as
339 * soon as memblock is initialized.
340 */
341 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
342 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
343 nid, flags, p_start, p_end, p_nid)
344
345 /**
346 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
347 * @i: u64 used as loop variable
348 * @nid: node selector, %NUMA_NO_NODE for all nodes
349 * @flags: pick from blocks based on memory attributes
350 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
351 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
352 * @p_nid: ptr to int for nid of the range, can be %NULL
353 *
354 * Walks over free (memory && !reserved) areas of memblock in reverse
355 * order. Available as soon as memblock is initialized.
356 */
357 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
358 p_nid) \
359 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
360 nid, flags, p_start, p_end, p_nid)
361
362 int memblock_set_node(phys_addr_t base, phys_addr_t size,
363 struct memblock_type *type, int nid);
364
365 #ifdef CONFIG_NUMA
memblock_set_region_node(struct memblock_region * r,int nid)366 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
367 {
368 r->nid = nid;
369 }
370
memblock_get_region_node(const struct memblock_region * r)371 static inline int memblock_get_region_node(const struct memblock_region *r)
372 {
373 return r->nid;
374 }
375 #else
memblock_set_region_node(struct memblock_region * r,int nid)376 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
377 {
378 }
379
memblock_get_region_node(const struct memblock_region * r)380 static inline int memblock_get_region_node(const struct memblock_region *r)
381 {
382 return 0;
383 }
384 #endif /* CONFIG_NUMA */
385
386 /* Flags for memblock allocation APIs */
387 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
388 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
389 /*
390 * MEMBLOCK_ALLOC_NOLEAKTRACE avoids kmemleak tracing. It implies
391 * MEMBLOCK_ALLOC_ACCESSIBLE
392 */
393 #define MEMBLOCK_ALLOC_NOLEAKTRACE 1
394
395 /* We are using top down, so it is safe to use 0 here */
396 #define MEMBLOCK_LOW_LIMIT 0
397
398 #ifndef ARCH_LOW_ADDRESS_LIMIT
399 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
400 #endif
401
402 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
403 phys_addr_t start, phys_addr_t end);
404 phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
405 phys_addr_t align, phys_addr_t start,
406 phys_addr_t end, int nid, bool exact_nid);
407 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
408
memblock_phys_alloc(phys_addr_t size,phys_addr_t align)409 static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
410 phys_addr_t align)
411 {
412 return memblock_phys_alloc_range(size, align, 0,
413 MEMBLOCK_ALLOC_ACCESSIBLE);
414 }
415
416 void *memblock_alloc_exact_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_raw(phys_addr_t size, phys_addr_t align,
420 phys_addr_t min_addr, phys_addr_t max_addr,
421 int nid);
422 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
423 phys_addr_t min_addr, phys_addr_t max_addr,
424 int nid);
425
memblock_alloc(phys_addr_t size,phys_addr_t align)426 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
427 {
428 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
429 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
430 }
431
432 void *__memblock_alloc_or_panic(phys_addr_t size, phys_addr_t align,
433 const char *func);
434
435 #define memblock_alloc_or_panic(size, align) \
436 __memblock_alloc_or_panic(size, align, __func__)
437
memblock_alloc_raw(phys_addr_t size,phys_addr_t align)438 static inline void *memblock_alloc_raw(phys_addr_t size,
439 phys_addr_t align)
440 {
441 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
442 MEMBLOCK_ALLOC_ACCESSIBLE,
443 NUMA_NO_NODE);
444 }
445
memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)446 static __always_inline void *memblock_alloc_from(phys_addr_t size,
447 phys_addr_t align,
448 phys_addr_t min_addr)
449 {
450 return memblock_alloc_try_nid(size, align, min_addr,
451 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
452 }
453
memblock_alloc_low(phys_addr_t size,phys_addr_t align)454 static inline void *memblock_alloc_low(phys_addr_t size,
455 phys_addr_t align)
456 {
457 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
458 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
459 }
460
memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)461 static inline void *memblock_alloc_node(phys_addr_t size,
462 phys_addr_t align, int nid)
463 {
464 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
465 MEMBLOCK_ALLOC_ACCESSIBLE, nid);
466 }
467
468 /*
469 * Set the allocation direction to bottom-up or top-down.
470 */
memblock_set_bottom_up(bool enable)471 static inline __init_memblock void memblock_set_bottom_up(bool enable)
472 {
473 memblock.bottom_up = enable;
474 }
475
476 /*
477 * Check if the allocation direction is bottom-up or not.
478 * if this is true, that said, memblock will allocate memory
479 * in bottom-up direction.
480 */
memblock_bottom_up(void)481 static inline __init_memblock bool memblock_bottom_up(void)
482 {
483 return memblock.bottom_up;
484 }
485
486 phys_addr_t memblock_phys_mem_size(void);
487 phys_addr_t memblock_reserved_size(void);
488 phys_addr_t memblock_reserved_kern_size(phys_addr_t limit, int nid);
489 unsigned long memblock_estimated_nr_free_pages(void);
490 phys_addr_t memblock_start_of_DRAM(void);
491 phys_addr_t memblock_end_of_DRAM(void);
492 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
493 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
494 void memblock_mem_limit_remove_map(phys_addr_t limit);
495 bool memblock_is_memory(phys_addr_t addr);
496 bool memblock_is_map_memory(phys_addr_t addr);
497 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
498 bool memblock_is_reserved(phys_addr_t addr);
499 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
500
501 void memblock_dump_all(void);
502
503 /**
504 * memblock_set_current_limit - Set the current allocation limit to allow
505 * limiting allocations to what is currently
506 * accessible during boot
507 * @limit: New limit value (physical address)
508 */
509 void memblock_set_current_limit(phys_addr_t limit);
510
511
512 phys_addr_t memblock_get_current_limit(void);
513
514 /*
515 * pfn conversion functions
516 *
517 * While the memory MEMBLOCKs should always be page aligned, the reserved
518 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
519 * idea of what they return for such non aligned MEMBLOCKs.
520 */
521
522 /**
523 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region
524 * @reg: memblock_region structure
525 *
526 * Return: the lowest pfn intersecting with the memory region
527 */
memblock_region_memory_base_pfn(const struct memblock_region * reg)528 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
529 {
530 return PFN_UP(reg->base);
531 }
532
533 /**
534 * memblock_region_memory_end_pfn - get the end pfn of the memory region
535 * @reg: memblock_region structure
536 *
537 * Return: the end_pfn of the reserved region
538 */
memblock_region_memory_end_pfn(const struct memblock_region * reg)539 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
540 {
541 return PFN_DOWN(reg->base + reg->size);
542 }
543
544 /**
545 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
546 * @reg: memblock_region structure
547 *
548 * Return: the lowest pfn intersecting with the reserved region
549 */
memblock_region_reserved_base_pfn(const struct memblock_region * reg)550 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
551 {
552 return PFN_DOWN(reg->base);
553 }
554
555 /**
556 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region
557 * @reg: memblock_region structure
558 *
559 * Return: the end_pfn of the reserved region
560 */
memblock_region_reserved_end_pfn(const struct memblock_region * reg)561 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
562 {
563 return PFN_UP(reg->base + reg->size);
564 }
565
566 /**
567 * for_each_mem_region - iterate over memory regions
568 * @region: loop variable
569 */
570 #define for_each_mem_region(region) \
571 for (region = memblock.memory.regions; \
572 region < (memblock.memory.regions + memblock.memory.cnt); \
573 region++)
574
575 /**
576 * for_each_reserved_mem_region - itereate over reserved memory regions
577 * @region: loop variable
578 */
579 #define for_each_reserved_mem_region(region) \
580 for (region = memblock.reserved.regions; \
581 region < (memblock.reserved.regions + memblock.reserved.cnt); \
582 region++)
583
584 extern void *alloc_large_system_hash(const char *tablename,
585 unsigned long bucketsize,
586 unsigned long numentries,
587 int scale,
588 int flags,
589 unsigned int *_hash_shift,
590 unsigned int *_hash_mask,
591 unsigned long low_limit,
592 unsigned long high_limit);
593
594 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
595 #define HASH_ZERO 0x00000002 /* Zero allocated hash table */
596
597 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
598 * sufficient vmalloc space.
599 */
600 #ifdef CONFIG_NUMA
601 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
602 extern bool hashdist; /* Distribute hashes across NUMA nodes? */
603 #else
604 #define hashdist (false)
605 #endif
606
607 #ifdef CONFIG_MEMTEST
608 void early_memtest(phys_addr_t start, phys_addr_t end);
609 void memtest_report_meminfo(struct seq_file *m);
610 #else
early_memtest(phys_addr_t start,phys_addr_t end)611 static inline void early_memtest(phys_addr_t start, phys_addr_t end) { }
memtest_report_meminfo(struct seq_file * m)612 static inline void memtest_report_meminfo(struct seq_file *m) { }
613 #endif
614
615 #ifdef CONFIG_MEMBLOCK_KHO_SCRATCH
616 void memblock_set_kho_scratch_only(void);
617 void memblock_clear_kho_scratch_only(void);
618 void memmap_init_kho_scratch_pages(void);
619 #else
memblock_set_kho_scratch_only(void)620 static inline void memblock_set_kho_scratch_only(void) { }
memblock_clear_kho_scratch_only(void)621 static inline void memblock_clear_kho_scratch_only(void) { }
memmap_init_kho_scratch_pages(void)622 static inline void memmap_init_kho_scratch_pages(void) {}
623 #endif
624
625 #endif /* _LINUX_MEMBLOCK_H */
626