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Yinghai Lu95f72d12010-07-12 14:36:09 +10001#ifndef _LINUX_MEMBLOCK_H
2#define _LINUX_MEMBLOCK_H
3#ifdef __KERNEL__
4
Yinghai Luf0b37fa2010-07-28 15:28:21 +10005#ifdef CONFIG_HAVE_MEMBLOCK
Yinghai Lu95f72d12010-07-12 14:36:09 +10006/*
7 * Logical memory blocks.
8 *
9 * Copyright (C) 2001 Peter Bergner, IBM Corp.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16
17#include <linux/init.h>
18#include <linux/mm.h>
19
Yinghai Lu37d8d4b2010-07-28 15:20:58 +100020#define INIT_MEMBLOCK_REGIONS 128
Philipp Hachtmann70210ed2014-01-29 18:16:01 +010021#define INIT_PHYSMEM_REGIONS 4
Yinghai Lu95f72d12010-07-12 14:36:09 +100022
Tang Chen66b16ed2014-01-21 15:49:23 -080023/* Definition of memblock flags. */
24#define MEMBLOCK_HOTPLUG 0x1 /* hotpluggable region */
25
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +100026struct memblock_region {
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +100027 phys_addr_t base;
28 phys_addr_t size;
Tang Chen66a20752014-01-21 15:49:20 -080029 unsigned long flags;
Tejun Heo7c0caeb2011-07-14 11:43:42 +020030#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
31 int nid;
32#endif
Yinghai Lu95f72d12010-07-12 14:36:09 +100033};
34
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +100035struct memblock_type {
Benjamin Herrenschmidtbf23c512010-07-06 15:39:06 -070036 unsigned long cnt; /* number of regions */
37 unsigned long max; /* size of the allocated array */
Tejun Heo1440c4e2011-12-08 10:22:08 -080038 phys_addr_t total_size; /* size of all regions */
Benjamin Herrenschmidtbf23c512010-07-06 15:39:06 -070039 struct memblock_region *regions;
Yinghai Lu95f72d12010-07-12 14:36:09 +100040};
41
42struct memblock {
Tang Chen79442ed2013-11-12 15:07:59 -080043 bool bottom_up; /* is bottom up direction? */
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +100044 phys_addr_t current_limit;
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +100045 struct memblock_type memory;
46 struct memblock_type reserved;
Philipp Hachtmann70210ed2014-01-29 18:16:01 +010047#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
48 struct memblock_type physmem;
49#endif
Yinghai Lu95f72d12010-07-12 14:36:09 +100050};
51
52extern struct memblock memblock;
Yinghai Lu5e63cf42010-07-28 15:07:21 +100053extern int memblock_debug;
Tang Chen55ac5902014-01-21 15:49:35 -080054#ifdef CONFIG_MOVABLE_NODE
55/* If movable_node boot option specified */
56extern bool movable_node_enabled;
57#endif /* CONFIG_MOVABLE_NODE */
Yinghai Lu5e63cf42010-07-28 15:07:21 +100058
59#define memblock_dbg(fmt, ...) \
60 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
Yinghai Lu95f72d12010-07-12 14:36:09 +100061
Grygorii Strashko87029ee2014-01-21 15:50:14 -080062phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
63 phys_addr_t start, phys_addr_t end,
64 int nid);
Tejun Heofc769a82011-07-12 09:58:10 +020065phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
66 phys_addr_t size, phys_addr_t align);
Yinghai Lu29f67382012-07-11 14:02:56 -070067phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
Philipp Hachtmann5e270e22014-01-23 15:53:11 -080068phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
Tejun Heo1aadc052011-12-08 10:22:08 -080069void memblock_allow_resize(void);
Tejun Heo7fb0bc32011-12-08 10:22:08 -080070int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
Tejun Heo581adcb2011-12-08 10:22:06 -080071int memblock_add(phys_addr_t base, phys_addr_t size);
72int memblock_remove(phys_addr_t base, phys_addr_t size);
73int memblock_free(phys_addr_t base, phys_addr_t size);
74int memblock_reserve(phys_addr_t base, phys_addr_t size);
Yinghai Lu6ede1fd2012-10-22 16:35:18 -070075void memblock_trim_memory(phys_addr_t align);
Tang Chen66b16ed2014-01-21 15:49:23 -080076int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
77int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
Philipp Hachtmannf1af9d32014-01-29 18:16:01 +010078
79/* Low level functions */
80int memblock_add_range(struct memblock_type *type,
81 phys_addr_t base, phys_addr_t size,
82 int nid, unsigned long flags);
83
84int memblock_remove_range(struct memblock_type *type,
85 phys_addr_t base,
86 phys_addr_t size);
87
88void __next_mem_range(u64 *idx, int nid, struct memblock_type *type_a,
89 struct memblock_type *type_b, phys_addr_t *out_start,
90 phys_addr_t *out_end, int *out_nid);
91
92void __next_mem_range_rev(u64 *idx, int nid, struct memblock_type *type_a,
93 struct memblock_type *type_b, phys_addr_t *out_start,
94 phys_addr_t *out_end, int *out_nid);
95
96/**
97 * for_each_mem_range - iterate through memblock areas from type_a and not
98 * included in type_b. Or just type_a if type_b is NULL.
99 * @i: u64 used as loop variable
100 * @type_a: ptr to memblock_type to iterate
101 * @type_b: ptr to memblock_type which excludes from the iteration
102 * @nid: node selector, %NUMA_NO_NODE for all nodes
103 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
104 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
105 * @p_nid: ptr to int for nid of the range, can be %NULL
106 */
107#define for_each_mem_range(i, type_a, type_b, nid, \
108 p_start, p_end, p_nid) \
109 for (i = 0, __next_mem_range(&i, nid, type_a, type_b, \
110 p_start, p_end, p_nid); \
111 i != (u64)ULLONG_MAX; \
112 __next_mem_range(&i, nid, type_a, type_b, \
113 p_start, p_end, p_nid))
114
115/**
116 * for_each_mem_range_rev - reverse iterate through memblock areas from
117 * type_a and not included in type_b. Or just type_a if type_b is NULL.
118 * @i: u64 used as loop variable
119 * @type_a: ptr to memblock_type to iterate
120 * @type_b: ptr to memblock_type which excludes from the iteration
121 * @nid: node selector, %NUMA_NO_NODE for all nodes
122 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
123 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
124 * @p_nid: ptr to int for nid of the range, can be %NULL
125 */
126#define for_each_mem_range_rev(i, type_a, type_b, nid, \
127 p_start, p_end, p_nid) \
128 for (i = (u64)ULLONG_MAX, \
129 __next_mem_range_rev(&i, nid, type_a, type_b, \
130 p_start, p_end, p_nid); \
131 i != (u64)ULLONG_MAX; \
132 __next_mem_range_rev(&i, nid, type_a, type_b, \
133 p_start, p_end, p_nid))
134
Tang Chen55ac5902014-01-21 15:49:35 -0800135#ifdef CONFIG_MOVABLE_NODE
136static inline bool memblock_is_hotpluggable(struct memblock_region *m)
137{
138 return m->flags & MEMBLOCK_HOTPLUG;
139}
140
141static inline bool movable_node_is_enabled(void)
142{
143 return movable_node_enabled;
144}
145#else
146static inline bool memblock_is_hotpluggable(struct memblock_region *m)
147{
148 return false;
149}
150static inline bool movable_node_is_enabled(void)
151{
152 return false;
153}
154#endif
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700155
Tejun Heo0ee332c2011-12-08 10:22:09 -0800156#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
Yinghai Lue76b63f2013-09-11 14:22:17 -0700157int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
158 unsigned long *end_pfn);
Tejun Heo0ee332c2011-12-08 10:22:09 -0800159void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
160 unsigned long *out_end_pfn, int *out_nid);
161
162/**
163 * for_each_mem_pfn_range - early memory pfn range iterator
164 * @i: an integer used as loop variable
165 * @nid: node selector, %MAX_NUMNODES for all nodes
166 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
167 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
168 * @p_nid: ptr to int for nid of the range, can be %NULL
169 *
Wanpeng Lif2d52fe2012-10-08 16:32:24 -0700170 * Walks over configured memory ranges.
Tejun Heo0ee332c2011-12-08 10:22:09 -0800171 */
172#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
173 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
174 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
175#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
176
Tejun Heo35fd0802011-07-12 11:15:59 +0200177/**
178 * for_each_free_mem_range - iterate through free memblock areas
179 * @i: u64 used as loop variable
Grygorii Strashkob1154232014-01-21 15:50:16 -0800180 * @nid: node selector, %NUMA_NO_NODE for all nodes
Tejun Heo35fd0802011-07-12 11:15:59 +0200181 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
182 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
183 * @p_nid: ptr to int for nid of the range, can be %NULL
184 *
185 * Walks over free (memory && !reserved) areas of memblock. Available as
186 * soon as memblock is initialized.
187 */
188#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
Philipp Hachtmannf1af9d32014-01-29 18:16:01 +0100189 for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
190 nid, p_start, p_end, p_nid)
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800191
192/**
193 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
194 * @i: u64 used as loop variable
Grygorii Strashkob1154232014-01-21 15:50:16 -0800195 * @nid: node selector, %NUMA_NO_NODE for all nodes
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800196 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
197 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
198 * @p_nid: ptr to int for nid of the range, can be %NULL
199 *
200 * Walks over free (memory && !reserved) areas of memblock in reverse
201 * order. Available as soon as memblock is initialized.
202 */
203#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
Philipp Hachtmannf1af9d32014-01-29 18:16:01 +0100204 for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
205 nid, p_start, p_end, p_nid)
Tejun Heo7bd0b0f2011-12-08 10:22:09 -0800206
Tang Chen66b16ed2014-01-21 15:49:23 -0800207static inline void memblock_set_region_flags(struct memblock_region *r,
208 unsigned long flags)
209{
210 r->flags |= flags;
211}
212
213static inline void memblock_clear_region_flags(struct memblock_region *r,
214 unsigned long flags)
215{
216 r->flags &= ~flags;
217}
218
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200219#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
Tang Chene7e8de52014-01-21 15:49:26 -0800220int memblock_set_node(phys_addr_t base, phys_addr_t size,
221 struct memblock_type *type, int nid);
Tejun Heo7c0caeb2011-07-14 11:43:42 +0200222
223static inline void memblock_set_region_node(struct memblock_region *r, int nid)
224{
225 r->nid = nid;
226}
227
228static inline int memblock_get_region_node(const struct memblock_region *r)
229{
230 return r->nid;
231}
232#else
233static inline void memblock_set_region_node(struct memblock_region *r, int nid)
234{
235}
236
237static inline int memblock_get_region_node(const struct memblock_region *r)
238{
239 return 0;
240}
241#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
242
Tejun Heo581adcb2011-12-08 10:22:06 -0800243phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
244phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
Benjamin Herrenschmidt9d1e2492010-07-06 15:39:17 -0700245
Tejun Heo581adcb2011-12-08 10:22:06 -0800246phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700247
Tang Chen79442ed2013-11-12 15:07:59 -0800248#ifdef CONFIG_MOVABLE_NODE
249/*
250 * Set the allocation direction to bottom-up or top-down.
251 */
252static inline void memblock_set_bottom_up(bool enable)
253{
254 memblock.bottom_up = enable;
255}
256
257/*
258 * Check if the allocation direction is bottom-up or not.
259 * if this is true, that said, memblock will allocate memory
260 * in bottom-up direction.
261 */
262static inline bool memblock_bottom_up(void)
263{
264 return memblock.bottom_up;
265}
266#else
267static inline void memblock_set_bottom_up(bool enable) {}
268static inline bool memblock_bottom_up(void) { return false; }
269#endif
270
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700271/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +1000272#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700273#define MEMBLOCK_ALLOC_ACCESSIBLE 0
274
Akinobu Mita2bfc2862014-06-04 16:06:53 -0700275phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
276 phys_addr_t start, phys_addr_t end);
Tejun Heo581adcb2011-12-08 10:22:06 -0800277phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
278 phys_addr_t max_addr);
279phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
280 phys_addr_t max_addr);
281phys_addr_t memblock_phys_mem_size(void);
Yinghai Lu595ad9a2013-01-24 12:20:09 -0800282phys_addr_t memblock_mem_size(unsigned long limit_pfn);
Tejun Heo581adcb2011-12-08 10:22:06 -0800283phys_addr_t memblock_start_of_DRAM(void);
284phys_addr_t memblock_end_of_DRAM(void);
285void memblock_enforce_memory_limit(phys_addr_t memory_limit);
286int memblock_is_memory(phys_addr_t addr);
287int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
288int memblock_is_reserved(phys_addr_t addr);
289int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000290
Tejun Heo4ff7b822011-12-08 10:22:06 -0800291extern void __memblock_dump_all(void);
292
293static inline void memblock_dump_all(void)
294{
295 if (memblock_debug)
296 __memblock_dump_all();
297}
Yinghai Lu95f72d12010-07-12 14:36:09 +1000298
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700299/**
300 * memblock_set_current_limit - Set the current allocation limit to allow
301 * limiting allocations to what is currently
302 * accessible during boot
303 * @limit: New limit value (physical address)
304 */
Tejun Heo581adcb2011-12-08 10:22:06 -0800305void memblock_set_current_limit(phys_addr_t limit);
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700306
Benjamin Herrenschmidt35a1f0b2010-07-06 15:38:58 -0700307
Laura Abbottfec51012014-02-27 01:23:43 +0100308phys_addr_t memblock_get_current_limit(void);
309
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000310/*
311 * pfn conversion functions
312 *
313 * While the memory MEMBLOCKs should always be page aligned, the reserved
314 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
315 * idea of what they return for such non aligned MEMBLOCKs.
316 */
317
318/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700319 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000320 * @reg: memblock_region structure
321 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700322static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000323{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700324 return PFN_UP(reg->base);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000325}
326
327/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700328 * memblock_region_memory_end_pfn - Return the end_pfn this region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000329 * @reg: memblock_region structure
330 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700331static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000332{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700333 return PFN_DOWN(reg->base + reg->size);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000334}
335
336/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700337 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000338 * @reg: memblock_region structure
339 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700340static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000341{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700342 return PFN_DOWN(reg->base);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000343}
344
345/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700346 * memblock_region_reserved_end_pfn - Return the end_pfn this region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000347 * @reg: memblock_region structure
348 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700349static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000350{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700351 return PFN_UP(reg->base + reg->size);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000352}
353
354#define for_each_memblock(memblock_type, region) \
355 for (region = memblock.memblock_type.regions; \
356 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
357 region++)
358
359
Tejun Heoc378ddd2011-07-14 11:46:03 +0200360#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
Tejun Heo67e24bc2011-07-14 11:42:03 +0200361#define __init_memblock __meminit
362#define __initdata_memblock __meminitdata
Yinghai Lu10d06432010-07-28 15:43:02 +1000363#else
364#define __init_memblock
365#define __initdata_memblock
366#endif
367
Yinghai Lu95dde502011-05-24 17:13:19 -0700368#else
369static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
370{
Tejun Heo1f5026a2011-07-12 09:58:09 +0200371 return 0;
Yinghai Lu95dde502011-05-24 17:13:19 -0700372}
373
Yinghai Luf0b37fa2010-07-28 15:28:21 +1000374#endif /* CONFIG_HAVE_MEMBLOCK */
375
Yinghai Lu95f72d12010-07-12 14:36:09 +1000376#endif /* __KERNEL__ */
377
378#endif /* _LINUX_MEMBLOCK_H */