memblock.h 14.0 KB
Newer Older
Y
Yinghai Lu 已提交
1 2 3 4
#ifndef _LINUX_MEMBLOCK_H
#define _LINUX_MEMBLOCK_H
#ifdef __KERNEL__

5
#ifdef CONFIG_HAVE_MEMBLOCK
Y
Yinghai Lu 已提交
6 7 8 9 10 11 12 13 14 15 16 17 18 19
/*
 * Logical memory blocks.
 *
 * Copyright (C) 2001 Peter Bergner, IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/init.h>
#include <linux/mm.h>

Y
Yinghai Lu 已提交
20
#define INIT_MEMBLOCK_REGIONS	128
21
#define INIT_PHYSMEM_REGIONS	4
Y
Yinghai Lu 已提交
22

23
/* Definition of memblock flags. */
24 25 26
enum {
	MEMBLOCK_NONE		= 0x0,	/* No special request */
	MEMBLOCK_HOTPLUG	= 0x1,	/* hotpluggable region */
27
	MEMBLOCK_MIRROR		= 0x2,	/* mirrored region */
28
	MEMBLOCK_NOMAP		= 0x4,	/* don't add to kernel direct mapping */
29
};
30

31
struct memblock_region {
32 33
	phys_addr_t base;
	phys_addr_t size;
34
	unsigned long flags;
T
Tejun Heo 已提交
35 36 37
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	int nid;
#endif
Y
Yinghai Lu 已提交
38 39
};

40
struct memblock_type {
41 42
	unsigned long cnt;	/* number of regions */
	unsigned long max;	/* size of the allocated array */
43
	phys_addr_t total_size;	/* size of all regions */
44
	struct memblock_region *regions;
Y
Yinghai Lu 已提交
45 46 47
};

struct memblock {
48
	bool bottom_up;  /* is bottom up direction? */
49
	phys_addr_t current_limit;
50 51
	struct memblock_type memory;
	struct memblock_type reserved;
52 53 54
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	struct memblock_type physmem;
#endif
Y
Yinghai Lu 已提交
55 56 57
};

extern struct memblock memblock;
58
extern int memblock_debug;
59 60 61 62
#ifdef CONFIG_MOVABLE_NODE
/* If movable_node boot option specified */
extern bool movable_node_enabled;
#endif /* CONFIG_MOVABLE_NODE */
63

64 65 66 67 68 69 70 71
#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
#define __init_memblock __meminit
#define __initdata_memblock __meminitdata
#else
#define __init_memblock
#define __initdata_memblock
#endif

72 73
#define memblock_dbg(fmt, ...) \
	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
Y
Yinghai Lu 已提交
74

75 76
phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
					    phys_addr_t start, phys_addr_t end,
77
					    int nid, ulong flags);
78 79
phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
				   phys_addr_t size, phys_addr_t align);
80
phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
81
phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
82
void memblock_allow_resize(void);
83
int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
84 85 86 87
int memblock_add(phys_addr_t base, phys_addr_t size);
int memblock_remove(phys_addr_t base, phys_addr_t size);
int memblock_free(phys_addr_t base, phys_addr_t size);
int memblock_reserve(phys_addr_t base, phys_addr_t size);
88
void memblock_trim_memory(phys_addr_t align);
89 90
bool memblock_overlaps_region(struct memblock_type *type,
			      phys_addr_t base, phys_addr_t size);
91 92
int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
93
int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
94
int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
95
ulong choose_memblock_flags(void);
96 97 98 99 100 101

/* Low level functions */
int memblock_add_range(struct memblock_type *type,
		       phys_addr_t base, phys_addr_t size,
		       int nid, unsigned long flags);

102 103
void __next_mem_range(u64 *idx, int nid, ulong flags,
		      struct memblock_type *type_a,
104 105 106
		      struct memblock_type *type_b, phys_addr_t *out_start,
		      phys_addr_t *out_end, int *out_nid);

107 108
void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
			  struct memblock_type *type_a,
109 110 111
			  struct memblock_type *type_b, phys_addr_t *out_start,
			  phys_addr_t *out_end, int *out_nid);

112 113 114
void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
			       phys_addr_t *out_end);

115 116 117 118 119 120 121
/**
 * for_each_mem_range - iterate through memblock areas from type_a and not
 * included in type_b. Or just type_a if type_b is NULL.
 * @i: u64 used as loop variable
 * @type_a: ptr to memblock_type to iterate
 * @type_b: ptr to memblock_type which excludes from the iteration
 * @nid: node selector, %NUMA_NO_NODE for all nodes
122
 * @flags: pick from blocks based on memory attributes
123 124 125 126
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 * @p_nid: ptr to int for nid of the range, can be %NULL
 */
127
#define for_each_mem_range(i, type_a, type_b, nid, flags,		\
128
			   p_start, p_end, p_nid)			\
129
	for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b,	\
130 131
				     p_start, p_end, p_nid);		\
	     i != (u64)ULLONG_MAX;					\
132
	     __next_mem_range(&i, nid, flags, type_a, type_b,		\
133 134 135 136 137 138 139 140 141
			      p_start, p_end, p_nid))

/**
 * for_each_mem_range_rev - reverse iterate through memblock areas from
 * type_a and not included in type_b. Or just type_a if type_b is NULL.
 * @i: u64 used as loop variable
 * @type_a: ptr to memblock_type to iterate
 * @type_b: ptr to memblock_type which excludes from the iteration
 * @nid: node selector, %NUMA_NO_NODE for all nodes
142
 * @flags: pick from blocks based on memory attributes
143 144 145 146
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 * @p_nid: ptr to int for nid of the range, can be %NULL
 */
147
#define for_each_mem_range_rev(i, type_a, type_b, nid, flags,		\
148 149
			       p_start, p_end, p_nid)			\
	for (i = (u64)ULLONG_MAX,					\
150
		     __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
151 152
					 p_start, p_end, p_nid);	\
	     i != (u64)ULLONG_MAX;					\
153
	     __next_mem_range_rev(&i, nid, flags, type_a, type_b,	\
154 155
				  p_start, p_end, p_nid))

156 157 158 159 160 161 162 163 164 165 166 167 168 169 170
/**
 * for_each_reserved_mem_region - iterate over all reserved memblock areas
 * @i: u64 used as loop variable
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 *
 * Walks over reserved areas of memblock. Available as soon as memblock
 * is initialized.
 */
#define for_each_reserved_mem_region(i, p_start, p_end)			\
	for (i = 0UL,							\
	     __next_reserved_mem_region(&i, p_start, p_end);		\
	     i != (u64)ULLONG_MAX;					\
	     __next_reserved_mem_region(&i, p_start, p_end))

171 172 173 174 175 176
#ifdef CONFIG_MOVABLE_NODE
static inline bool memblock_is_hotpluggable(struct memblock_region *m)
{
	return m->flags & MEMBLOCK_HOTPLUG;
}

177
static inline bool __init_memblock movable_node_is_enabled(void)
178 179 180 181 182 183 184 185 186 187 188 189 190
{
	return movable_node_enabled;
}
#else
static inline bool memblock_is_hotpluggable(struct memblock_region *m)
{
	return false;
}
static inline bool movable_node_is_enabled(void)
{
	return false;
}
#endif
191

192 193 194 195 196
static inline bool memblock_is_mirror(struct memblock_region *m)
{
	return m->flags & MEMBLOCK_MIRROR;
}

197 198 199 200 201
static inline bool memblock_is_nomap(struct memblock_region *m)
{
	return m->flags & MEMBLOCK_NOMAP;
}

T
Tejun Heo 已提交
202
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
203 204
int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
			    unsigned long  *end_pfn);
T
Tejun Heo 已提交
205 206 207 208 209 210 211 212 213 214 215
void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
			  unsigned long *out_end_pfn, int *out_nid);

/**
 * for_each_mem_pfn_range - early memory pfn range iterator
 * @i: an integer used as loop variable
 * @nid: node selector, %MAX_NUMNODES for all nodes
 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
 * @p_nid: ptr to int for nid of the range, can be %NULL
 *
216
 * Walks over configured memory ranges.
T
Tejun Heo 已提交
217 218 219 220 221 222
 */
#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid)		\
	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	     i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */

223 224 225
/**
 * for_each_free_mem_range - iterate through free memblock areas
 * @i: u64 used as loop variable
226
 * @nid: node selector, %NUMA_NO_NODE for all nodes
227
 * @flags: pick from blocks based on memory attributes
228 229 230 231 232 233 234
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 * @p_nid: ptr to int for nid of the range, can be %NULL
 *
 * Walks over free (memory && !reserved) areas of memblock.  Available as
 * soon as memblock is initialized.
 */
235
#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid)	\
236
	for_each_mem_range(i, &memblock.memory, &memblock.reserved,	\
237
			   nid, flags, p_start, p_end, p_nid)
238 239 240 241

/**
 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
 * @i: u64 used as loop variable
242
 * @nid: node selector, %NUMA_NO_NODE for all nodes
243
 * @flags: pick from blocks based on memory attributes
244 245 246 247 248 249 250
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 * @p_nid: ptr to int for nid of the range, can be %NULL
 *
 * Walks over free (memory && !reserved) areas of memblock in reverse
 * order.  Available as soon as memblock is initialized.
 */
251 252
#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end,	\
					p_nid)				\
253
	for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved,	\
254
			       nid, flags, p_start, p_end, p_nid)
255

256 257 258 259 260 261 262 263 264 265 266 267
static inline void memblock_set_region_flags(struct memblock_region *r,
					     unsigned long flags)
{
	r->flags |= flags;
}

static inline void memblock_clear_region_flags(struct memblock_region *r,
					       unsigned long flags)
{
	r->flags &= ~flags;
}

T
Tejun Heo 已提交
268
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
269 270
int memblock_set_node(phys_addr_t base, phys_addr_t size,
		      struct memblock_type *type, int nid);
T
Tejun Heo 已提交
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291

static inline void memblock_set_region_node(struct memblock_region *r, int nid)
{
	r->nid = nid;
}

static inline int memblock_get_region_node(const struct memblock_region *r)
{
	return r->nid;
}
#else
static inline void memblock_set_region_node(struct memblock_region *r, int nid)
{
}

static inline int memblock_get_region_node(const struct memblock_region *r)
{
	return 0;
}
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */

292 293
phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
294

295
phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
296

297 298 299 300
#ifdef CONFIG_MOVABLE_NODE
/*
 * Set the allocation direction to bottom-up or top-down.
 */
301
static inline void __init memblock_set_bottom_up(bool enable)
302 303 304 305 306 307 308 309 310 311 312 313 314 315
{
	memblock.bottom_up = enable;
}

/*
 * Check if the allocation direction is bottom-up or not.
 * if this is true, that said, memblock will allocate memory
 * in bottom-up direction.
 */
static inline bool memblock_bottom_up(void)
{
	return memblock.bottom_up;
}
#else
316
static inline void __init memblock_set_bottom_up(bool enable) {}
317 318 319
static inline bool memblock_bottom_up(void) { return false; }
#endif

320
/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
321
#define MEMBLOCK_ALLOC_ANYWHERE	(~(phys_addr_t)0)
322 323
#define MEMBLOCK_ALLOC_ACCESSIBLE	0

324
phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
325 326
					phys_addr_t start, phys_addr_t end,
					ulong flags);
327 328 329 330 331
phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
				phys_addr_t max_addr);
phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
				  phys_addr_t max_addr);
phys_addr_t memblock_phys_mem_size(void);
Y
Yinghai Lu 已提交
332
phys_addr_t memblock_mem_size(unsigned long limit_pfn);
333 334 335
phys_addr_t memblock_start_of_DRAM(void);
phys_addr_t memblock_end_of_DRAM(void);
void memblock_enforce_memory_limit(phys_addr_t memory_limit);
336
bool memblock_is_memory(phys_addr_t addr);
337
int memblock_is_map_memory(phys_addr_t addr);
338
int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
339
bool memblock_is_reserved(phys_addr_t addr);
340
bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
341

T
Tejun Heo 已提交
342 343 344 345 346 347 348
extern void __memblock_dump_all(void);

static inline void memblock_dump_all(void)
{
	if (memblock_debug)
		__memblock_dump_all();
}
Y
Yinghai Lu 已提交
349

350 351 352 353 354 355
/**
 * memblock_set_current_limit - Set the current allocation limit to allow
 *                         limiting allocations to what is currently
 *                         accessible during boot
 * @limit: New limit value (physical address)
 */
356
void memblock_set_current_limit(phys_addr_t limit);
357

358

359 360
phys_addr_t memblock_get_current_limit(void);

361 362 363 364 365 366 367 368 369
/*
 * pfn conversion functions
 *
 * While the memory MEMBLOCKs should always be page aligned, the reserved
 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
 * idea of what they return for such non aligned MEMBLOCKs.
 */

/**
370
 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
371 372
 * @reg: memblock_region structure
 */
373
static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
374
{
375
	return PFN_UP(reg->base);
376 377 378
}

/**
379
 * memblock_region_memory_end_pfn - Return the end_pfn this region
380 381
 * @reg: memblock_region structure
 */
382
static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
383
{
384
	return PFN_DOWN(reg->base + reg->size);
385 386 387
}

/**
388
 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
389 390
 * @reg: memblock_region structure
 */
391
static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
392
{
393
	return PFN_DOWN(reg->base);
394 395 396
}

/**
397
 * memblock_region_reserved_end_pfn - Return the end_pfn this region
398 399
 * @reg: memblock_region structure
 */
400
static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
401
{
402
	return PFN_UP(reg->base + reg->size);
403 404 405 406 407 408 409
}

#define for_each_memblock(memblock_type, region)					\
	for (region = memblock.memblock_type.regions;				\
	     region < (memblock.memblock_type.regions + memblock.memblock_type.cnt);	\
	     region++)

410 411 412 413 414
#define for_each_memblock_type(memblock_type, rgn)			\
	idx = 0;							\
	rgn = &memblock_type->regions[idx];				\
	for (idx = 0; idx < memblock_type->cnt;				\
	     idx++,rgn = &memblock_type->regions[idx])
415

V
Vladimir Murzin 已提交
416
#ifdef CONFIG_MEMTEST
417
extern void early_memtest(phys_addr_t start, phys_addr_t end);
V
Vladimir Murzin 已提交
418
#else
419
static inline void early_memtest(phys_addr_t start, phys_addr_t end)
V
Vladimir Murzin 已提交
420 421 422 423
{
}
#endif

424 425 426
#else
static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
{
T
Tejun Heo 已提交
427
	return 0;
428 429
}

430 431
#endif /* CONFIG_HAVE_MEMBLOCK */

Y
Yinghai Lu 已提交
432 433 434
#endif /* __KERNEL__ */

#endif /* _LINUX_MEMBLOCK_H */