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 unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
122 				     phys_addr_t base2, phys_addr_t size2);
123 bool memblock_overlaps_region(struct memblock_type *type,
124 			      phys_addr_t base, phys_addr_t size);
125 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
126 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
127 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
128 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
129 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
130 
131 void memblock_free_all(void);
132 void memblock_free(void *ptr, size_t size);
133 void reset_all_zones_managed_pages(void);
134 
135 /* Low level functions */
136 void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
137 		      struct memblock_type *type_a,
138 		      struct memblock_type *type_b, phys_addr_t *out_start,
139 		      phys_addr_t *out_end, int *out_nid);
140 
141 void __next_mem_range_rev(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 memblock_free_late(phys_addr_t base, phys_addr_t size);
147 
148 #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)149 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
150 					phys_addr_t *out_start,
151 					phys_addr_t *out_end)
152 {
153 	extern struct memblock_type physmem;
154 
155 	__next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type,
156 			 out_start, out_end, NULL);
157 }
158 
159 /**
160  * for_each_physmem_range - iterate through physmem areas not included in type.
161  * @i: u64 used as loop variable
162  * @type: ptr to memblock_type which excludes from the iteration, can be %NULL
163  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
164  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
165  */
166 #define for_each_physmem_range(i, type, p_start, p_end)			\
167 	for (i = 0, __next_physmem_range(&i, type, p_start, p_end);	\
168 	     i != (u64)ULLONG_MAX;					\
169 	     __next_physmem_range(&i, type, p_start, p_end))
170 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */
171 
172 /**
173  * __for_each_mem_range - iterate through memblock areas from type_a and not
174  * included in type_b. Or just type_a if type_b is NULL.
175  * @i: u64 used as loop variable
176  * @type_a: ptr to memblock_type to iterate
177  * @type_b: ptr to memblock_type which excludes from the iteration
178  * @nid: node selector, %NUMA_NO_NODE for all nodes
179  * @flags: pick from blocks based on memory attributes
180  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
181  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
182  * @p_nid: ptr to int for nid of the range, can be %NULL
183  */
184 #define __for_each_mem_range(i, type_a, type_b, nid, flags,		\
185 			   p_start, p_end, p_nid)			\
186 	for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b,	\
187 				     p_start, p_end, p_nid);		\
188 	     i != (u64)ULLONG_MAX;					\
189 	     __next_mem_range(&i, nid, flags, type_a, type_b,		\
190 			      p_start, p_end, p_nid))
191 
192 /**
193  * __for_each_mem_range_rev - reverse iterate through memblock areas from
194  * type_a and not included in type_b. Or just type_a if type_b is NULL.
195  * @i: u64 used as loop variable
196  * @type_a: ptr to memblock_type to iterate
197  * @type_b: ptr to memblock_type which excludes from the iteration
198  * @nid: node selector, %NUMA_NO_NODE for all nodes
199  * @flags: pick from blocks based on memory attributes
200  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
201  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
202  * @p_nid: ptr to int for nid of the range, can be %NULL
203  */
204 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags,		\
205 				 p_start, p_end, p_nid)			\
206 	for (i = (u64)ULLONG_MAX,					\
207 		     __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
208 					  p_start, p_end, p_nid);	\
209 	     i != (u64)ULLONG_MAX;					\
210 	     __next_mem_range_rev(&i, nid, flags, type_a, type_b,	\
211 				  p_start, p_end, p_nid))
212 
213 /**
214  * for_each_mem_range - iterate through memory areas.
215  * @i: u64 used as loop variable
216  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
217  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
218  */
219 #define for_each_mem_range(i, p_start, p_end) \
220 	__for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE,	\
221 			     MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \
222 			     p_start, p_end, NULL)
223 
224 /**
225  * for_each_mem_range_rev - reverse iterate through memblock areas from
226  * type_a and not included in type_b. Or just type_a if type_b is NULL.
227  * @i: u64 used as loop variable
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  */
231 #define for_each_mem_range_rev(i, p_start, p_end)			\
232 	__for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \
233 				 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\
234 				 p_start, p_end, NULL)
235 
236 /**
237  * for_each_reserved_mem_range - iterate over all reserved memblock areas
238  * @i: u64 used as loop variable
239  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
240  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
241  *
242  * Walks over reserved areas of memblock. Available as soon as memblock
243  * is initialized.
244  */
245 #define for_each_reserved_mem_range(i, p_start, p_end)			\
246 	__for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE,	\
247 			     MEMBLOCK_NONE, p_start, p_end, NULL)
248 
memblock_is_hotpluggable(struct memblock_region * m)249 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
250 {
251 	return m->flags & MEMBLOCK_HOTPLUG;
252 }
253 
memblock_is_mirror(struct memblock_region * m)254 static inline bool memblock_is_mirror(struct memblock_region *m)
255 {
256 	return m->flags & MEMBLOCK_MIRROR;
257 }
258 
memblock_is_nomap(struct memblock_region * m)259 static inline bool memblock_is_nomap(struct memblock_region *m)
260 {
261 	return m->flags & MEMBLOCK_NOMAP;
262 }
263 
memblock_is_driver_managed(struct memblock_region * m)264 static inline bool memblock_is_driver_managed(struct memblock_region *m)
265 {
266 	return m->flags & MEMBLOCK_DRIVER_MANAGED;
267 }
268 
269 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
270 			    unsigned long  *end_pfn);
271 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
272 			  unsigned long *out_end_pfn, int *out_nid);
273 
274 /**
275  * for_each_mem_pfn_range - early memory pfn range iterator
276  * @i: an integer used as loop variable
277  * @nid: node selector, %MAX_NUMNODES for all nodes
278  * @p_start: ptr to ulong for start pfn of the range, can be %NULL
279  * @p_end: ptr to ulong for end pfn of the range, can be %NULL
280  * @p_nid: ptr to int for nid of the range, can be %NULL
281  *
282  * Walks over configured memory ranges.
283  */
284 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid)		\
285 	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
286 	     i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
287 
288 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
289 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
290 				  unsigned long *out_spfn,
291 				  unsigned long *out_epfn);
292 /**
293  * for_each_free_mem_pfn_range_in_zone - iterate through zone specific free
294  * memblock areas
295  * @i: u64 used as loop variable
296  * @zone: zone in which all of the memory blocks reside
297  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
298  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
299  *
300  * Walks over free (memory && !reserved) areas of memblock in a specific
301  * zone. Available once memblock and an empty zone is initialized. The main
302  * assumption is that the zone start, end, and pgdat have been associated.
303  * This way we can use the zone to determine NUMA node, and if a given part
304  * of the memblock is valid for the zone.
305  */
306 #define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end)	\
307 	for (i = 0,							\
308 	     __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end);	\
309 	     i != U64_MAX;					\
310 	     __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
311 
312 /**
313  * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific
314  * free memblock areas from a given point
315  * @i: u64 used as loop variable
316  * @zone: zone in which all of the memory blocks reside
317  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
318  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
319  *
320  * Walks over free (memory && !reserved) areas of memblock in a specific
321  * zone, continuing from current position. Available as soon as memblock is
322  * initialized.
323  */
324 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \
325 	for (; i != U64_MAX;					  \
326 	     __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end))
327 
328 int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask);
329 
330 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
331 
332 /**
333  * for_each_free_mem_range - iterate through free memblock areas
334  * @i: u64 used as loop variable
335  * @nid: node selector, %NUMA_NO_NODE for all nodes
336  * @flags: pick from blocks based on memory attributes
337  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
338  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
339  * @p_nid: ptr to int for nid of the range, can be %NULL
340  *
341  * Walks over free (memory && !reserved) areas of memblock.  Available as
342  * soon as memblock is initialized.
343  */
344 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid)	\
345 	__for_each_mem_range(i, &memblock.memory, &memblock.reserved,	\
346 			     nid, flags, p_start, p_end, p_nid)
347 
348 /**
349  * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
350  * @i: u64 used as loop variable
351  * @nid: node selector, %NUMA_NO_NODE for all nodes
352  * @flags: pick from blocks based on memory attributes
353  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
354  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
355  * @p_nid: ptr to int for nid of the range, can be %NULL
356  *
357  * Walks over free (memory && !reserved) areas of memblock in reverse
358  * order.  Available as soon as memblock is initialized.
359  */
360 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end,	\
361 					p_nid)				\
362 	__for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
363 				 nid, flags, p_start, p_end, p_nid)
364 
365 int memblock_set_node(phys_addr_t base, phys_addr_t size,
366 		      struct memblock_type *type, int nid);
367 
368 #ifdef CONFIG_NUMA
memblock_set_region_node(struct memblock_region * r,int nid)369 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
370 {
371 	r->nid = nid;
372 }
373 
memblock_get_region_node(const struct memblock_region * r)374 static inline int memblock_get_region_node(const struct memblock_region *r)
375 {
376 	return r->nid;
377 }
378 #else
memblock_set_region_node(struct memblock_region * r,int nid)379 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
380 {
381 }
382 
memblock_get_region_node(const struct memblock_region * r)383 static inline int memblock_get_region_node(const struct memblock_region *r)
384 {
385 	return 0;
386 }
387 #endif /* CONFIG_NUMA */
388 
389 /* Flags for memblock allocation APIs */
390 #define MEMBLOCK_ALLOC_ANYWHERE	(~(phys_addr_t)0)
391 #define MEMBLOCK_ALLOC_ACCESSIBLE	0
392 #define MEMBLOCK_ALLOC_NOLEAKTRACE	1
393 
394 /* We are using top down, so it is safe to use 0 here */
395 #define MEMBLOCK_LOW_LIMIT 0
396 
397 #ifndef ARCH_LOW_ADDRESS_LIMIT
398 #define ARCH_LOW_ADDRESS_LIMIT  0xffffffffUL
399 #endif
400 
401 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
402 				      phys_addr_t start, phys_addr_t end);
403 phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
404 				      phys_addr_t align, phys_addr_t start,
405 				      phys_addr_t end, int nid, bool exact_nid);
406 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
407 
memblock_phys_alloc(phys_addr_t size,phys_addr_t align)408 static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
409 						       phys_addr_t align)
410 {
411 	return memblock_phys_alloc_range(size, align, 0,
412 					 MEMBLOCK_ALLOC_ACCESSIBLE);
413 }
414 
415 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align,
416 				 phys_addr_t min_addr, phys_addr_t max_addr,
417 				 int nid);
418 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
419 				 phys_addr_t min_addr, phys_addr_t max_addr,
420 				 int nid);
421 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align,
422 			     phys_addr_t min_addr, phys_addr_t max_addr,
423 			     int nid);
424 
memblock_alloc(phys_addr_t size,phys_addr_t align)425 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
426 {
427 	return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
428 				      MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
429 }
430 
memblock_alloc_raw(phys_addr_t size,phys_addr_t align)431 static inline void *memblock_alloc_raw(phys_addr_t size,
432 					       phys_addr_t align)
433 {
434 	return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT,
435 					  MEMBLOCK_ALLOC_ACCESSIBLE,
436 					  NUMA_NO_NODE);
437 }
438 
memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)439 static inline void *memblock_alloc_from(phys_addr_t size,
440 						phys_addr_t align,
441 						phys_addr_t min_addr)
442 {
443 	return memblock_alloc_try_nid(size, align, min_addr,
444 				      MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
445 }
446 
memblock_alloc_low(phys_addr_t size,phys_addr_t align)447 static inline void *memblock_alloc_low(phys_addr_t size,
448 					       phys_addr_t align)
449 {
450 	return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
451 				      ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE);
452 }
453 
memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)454 static inline void *memblock_alloc_node(phys_addr_t size,
455 						phys_addr_t align, int nid)
456 {
457 	return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT,
458 				      MEMBLOCK_ALLOC_ACCESSIBLE, nid);
459 }
460 
461 /*
462  * Set the allocation direction to bottom-up or top-down.
463  */
memblock_set_bottom_up(bool enable)464 static inline __init_memblock void memblock_set_bottom_up(bool enable)
465 {
466 	memblock.bottom_up = enable;
467 }
468 
469 /*
470  * Check if the allocation direction is bottom-up or not.
471  * if this is true, that said, memblock will allocate memory
472  * in bottom-up direction.
473  */
memblock_bottom_up(void)474 static inline __init_memblock bool memblock_bottom_up(void)
475 {
476 	return memblock.bottom_up;
477 }
478 
479 phys_addr_t memblock_phys_mem_size(void);
480 phys_addr_t memblock_reserved_size(void);
481 phys_addr_t memblock_start_of_DRAM(void);
482 phys_addr_t memblock_end_of_DRAM(void);
483 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
484 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
485 void memblock_mem_limit_remove_map(phys_addr_t limit);
486 bool memblock_is_memory(phys_addr_t addr);
487 bool memblock_is_map_memory(phys_addr_t addr);
488 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
489 bool memblock_is_reserved(phys_addr_t addr);
490 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
491 
492 void memblock_dump_all(void);
493 
494 /**
495  * memblock_set_current_limit - Set the current allocation limit to allow
496  *                         limiting allocations to what is currently
497  *                         accessible during boot
498  * @limit: New limit value (physical address)
499  */
500 void memblock_set_current_limit(phys_addr_t limit);
501 
502 
503 phys_addr_t memblock_get_current_limit(void);
504 
505 /*
506  * pfn conversion functions
507  *
508  * While the memory MEMBLOCKs should always be page aligned, the reserved
509  * MEMBLOCKs may not be. This accessor attempt to provide a very clear
510  * idea of what they return for such non aligned MEMBLOCKs.
511  */
512 
513 /**
514  * memblock_region_memory_base_pfn - get the lowest pfn of the memory region
515  * @reg: memblock_region structure
516  *
517  * Return: the lowest pfn intersecting with the memory region
518  */
memblock_region_memory_base_pfn(const struct memblock_region * reg)519 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
520 {
521 	return PFN_UP(reg->base);
522 }
523 
524 /**
525  * memblock_region_memory_end_pfn - get the end pfn of the memory region
526  * @reg: memblock_region structure
527  *
528  * Return: the end_pfn of the reserved region
529  */
memblock_region_memory_end_pfn(const struct memblock_region * reg)530 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
531 {
532 	return PFN_DOWN(reg->base + reg->size);
533 }
534 
535 /**
536  * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region
537  * @reg: memblock_region structure
538  *
539  * Return: the lowest pfn intersecting with the reserved region
540  */
memblock_region_reserved_base_pfn(const struct memblock_region * reg)541 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
542 {
543 	return PFN_DOWN(reg->base);
544 }
545 
546 /**
547  * memblock_region_reserved_end_pfn - get the end pfn of the reserved region
548  * @reg: memblock_region structure
549  *
550  * Return: the end_pfn of the reserved region
551  */
memblock_region_reserved_end_pfn(const struct memblock_region * reg)552 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
553 {
554 	return PFN_UP(reg->base + reg->size);
555 }
556 
557 /**
558  * for_each_mem_region - itereate over memory regions
559  * @region: loop variable
560  */
561 #define for_each_mem_region(region)					\
562 	for (region = memblock.memory.regions;				\
563 	     region < (memblock.memory.regions + memblock.memory.cnt);	\
564 	     region++)
565 
566 /**
567  * for_each_reserved_mem_region - itereate over reserved memory regions
568  * @region: loop variable
569  */
570 #define for_each_reserved_mem_region(region)				\
571 	for (region = memblock.reserved.regions;			\
572 	     region < (memblock.reserved.regions + memblock.reserved.cnt); \
573 	     region++)
574 
575 extern void *alloc_large_system_hash(const char *tablename,
576 				     unsigned long bucketsize,
577 				     unsigned long numentries,
578 				     int scale,
579 				     int flags,
580 				     unsigned int *_hash_shift,
581 				     unsigned int *_hash_mask,
582 				     unsigned long low_limit,
583 				     unsigned long high_limit);
584 
585 #define HASH_EARLY	0x00000001	/* Allocating during early boot? */
586 #define HASH_ZERO	0x00000002	/* Zero allocated hash table */
587 
588 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
589  * sufficient vmalloc space.
590  */
591 #ifdef CONFIG_NUMA
592 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
593 extern int hashdist;		/* Distribute hashes across NUMA nodes? */
594 #else
595 #define hashdist (0)
596 #endif
597 
598 #ifdef CONFIG_MEMTEST
599 void early_memtest(phys_addr_t start, phys_addr_t end);
600 void memtest_report_meminfo(struct seq_file *m);
601 #else
early_memtest(phys_addr_t start,phys_addr_t end)602 static inline void early_memtest(phys_addr_t start, phys_addr_t end) { }
memtest_report_meminfo(struct seq_file * m)603 static inline void memtest_report_meminfo(struct seq_file *m) { }
604 #endif
605 
606 
607 #endif /* _LINUX_MEMBLOCK_H */
608