1 #ifndef _LINUX_MEMBLOCK_H
2 #define _LINUX_MEMBLOCK_H
5 #ifdef CONFIG_HAVE_MEMBLOCK
7 * Logical memory blocks.
9 * Copyright (C) 2001 Peter Bergner, IBM Corp.
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.
17 #include <linux/init.h>
20 #define INIT_MEMBLOCK_REGIONS 128
21 #define INIT_PHYSMEM_REGIONS 4
23 /* Definition of memblock flags. */
25 MEMBLOCK_NONE
= 0x0, /* No special request */
26 MEMBLOCK_HOTPLUG
= 0x1, /* hotpluggable region */
27 MEMBLOCK_MIRROR
= 0x2, /* mirrored region */
28 MEMBLOCK_NOMAP
= 0x4, /* don't add to kernel direct mapping */
31 struct memblock_region
{
35 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
40 struct memblock_type
{
41 unsigned long cnt
; /* number of regions */
42 unsigned long max
; /* size of the allocated array */
43 phys_addr_t total_size
; /* size of all regions */
44 struct memblock_region
*regions
;
49 bool bottom_up
; /* is bottom up direction? */
50 phys_addr_t current_limit
;
51 struct memblock_type memory
;
52 struct memblock_type reserved
;
53 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
54 struct memblock_type physmem
;
58 extern struct memblock memblock
;
59 extern int memblock_debug
;
61 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
62 #define __init_memblock __meminit
63 #define __initdata_memblock __meminitdata
64 void memblock_discard(void);
66 #define __init_memblock
67 #define __initdata_memblock
70 #define memblock_dbg(fmt, ...) \
71 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
73 phys_addr_t
memblock_find_in_range_node(phys_addr_t size
, phys_addr_t align
,
74 phys_addr_t start
, phys_addr_t end
,
75 int nid
, ulong flags
);
76 phys_addr_t
memblock_find_in_range(phys_addr_t start
, phys_addr_t end
,
77 phys_addr_t size
, phys_addr_t align
);
78 void memblock_allow_resize(void);
79 int memblock_add_node(phys_addr_t base
, phys_addr_t size
, int nid
);
80 int memblock_add(phys_addr_t base
, phys_addr_t size
);
81 int memblock_remove(phys_addr_t base
, phys_addr_t size
);
82 int memblock_free(phys_addr_t base
, phys_addr_t size
);
83 int memblock_reserve(phys_addr_t base
, phys_addr_t size
);
84 void memblock_trim_memory(phys_addr_t align
);
85 bool memblock_overlaps_region(struct memblock_type
*type
,
86 phys_addr_t base
, phys_addr_t size
);
87 int memblock_mark_hotplug(phys_addr_t base
, phys_addr_t size
);
88 int memblock_clear_hotplug(phys_addr_t base
, phys_addr_t size
);
89 int memblock_mark_mirror(phys_addr_t base
, phys_addr_t size
);
90 int memblock_mark_nomap(phys_addr_t base
, phys_addr_t size
);
91 int memblock_clear_nomap(phys_addr_t base
, phys_addr_t size
);
92 ulong
choose_memblock_flags(void);
94 /* Low level functions */
95 int memblock_add_range(struct memblock_type
*type
,
96 phys_addr_t base
, phys_addr_t size
,
97 int nid
, unsigned long flags
);
99 void __next_mem_range(u64
*idx
, int nid
, ulong flags
,
100 struct memblock_type
*type_a
,
101 struct memblock_type
*type_b
, phys_addr_t
*out_start
,
102 phys_addr_t
*out_end
, int *out_nid
);
104 void __next_mem_range_rev(u64
*idx
, int nid
, ulong flags
,
105 struct memblock_type
*type_a
,
106 struct memblock_type
*type_b
, phys_addr_t
*out_start
,
107 phys_addr_t
*out_end
, int *out_nid
);
109 void __next_reserved_mem_region(u64
*idx
, phys_addr_t
*out_start
,
110 phys_addr_t
*out_end
);
112 void __memblock_free_early(phys_addr_t base
, phys_addr_t size
);
113 void __memblock_free_late(phys_addr_t base
, phys_addr_t size
);
116 * for_each_mem_range - iterate through memblock areas from type_a and not
117 * 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 * @flags: pick from blocks based on memory attributes
123 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
124 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
125 * @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 p_start, p_end, p_nid); \
131 i != (u64)ULLONG_MAX; \
132 __next_mem_range(&i, nid, flags, type_a, type_b, \
133 p_start, p_end, p_nid))
136 * for_each_mem_range_rev - reverse iterate through memblock areas from
137 * type_a and not included in type_b. Or just type_a if type_b is NULL.
138 * @i: u64 used as loop variable
139 * @type_a: ptr to memblock_type to iterate
140 * @type_b: ptr to memblock_type which excludes from the iteration
141 * @nid: node selector, %NUMA_NO_NODE for all nodes
142 * @flags: pick from blocks based on memory attributes
143 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
144 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
145 * @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 p_start, p_end, p_nid) \
149 for (i = (u64)ULLONG_MAX, \
150 __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
151 p_start, p_end, p_nid); \
152 i != (u64)ULLONG_MAX; \
153 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
154 p_start, p_end, p_nid))
157 * for_each_reserved_mem_region - iterate over all reserved memblock areas
158 * @i: u64 used as loop variable
159 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
160 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
162 * Walks over reserved areas of memblock. Available as soon as memblock
165 #define for_each_reserved_mem_region(i, p_start, p_end) \
166 for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \
167 i != (u64)ULLONG_MAX; \
168 __next_reserved_mem_region(&i, p_start, p_end))
170 static inline bool memblock_is_hotpluggable(struct memblock_region
*m
)
172 return m
->flags
& MEMBLOCK_HOTPLUG
;
175 static inline bool memblock_is_mirror(struct memblock_region
*m
)
177 return m
->flags
& MEMBLOCK_MIRROR
;
180 static inline bool memblock_is_nomap(struct memblock_region
*m
)
182 return m
->flags
& MEMBLOCK_NOMAP
;
185 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
186 int memblock_search_pfn_nid(unsigned long pfn
, unsigned long *start_pfn
,
187 unsigned long *end_pfn
);
188 void __next_mem_pfn_range(int *idx
, int nid
, unsigned long *out_start_pfn
,
189 unsigned long *out_end_pfn
, int *out_nid
);
190 unsigned long memblock_next_valid_pfn(unsigned long pfn
, unsigned long max_pfn
);
193 * for_each_mem_pfn_range - early memory pfn range iterator
194 * @i: an integer used as loop variable
195 * @nid: node selector, %MAX_NUMNODES for all nodes
196 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
197 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
198 * @p_nid: ptr to int for nid of the range, can be %NULL
200 * Walks over configured memory ranges.
202 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
203 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
204 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
205 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
208 * for_each_free_mem_range - iterate through free memblock areas
209 * @i: u64 used as loop variable
210 * @nid: node selector, %NUMA_NO_NODE for all nodes
211 * @flags: pick from blocks based on memory attributes
212 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
213 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
214 * @p_nid: ptr to int for nid of the range, can be %NULL
216 * Walks over free (memory && !reserved) areas of memblock. Available as
217 * soon as memblock is initialized.
219 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
220 for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
221 nid, flags, p_start, p_end, p_nid)
224 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
225 * @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 * @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
232 * Walks over free (memory && !reserved) areas of memblock in reverse
233 * order. Available as soon as memblock is initialized.
235 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
237 for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
238 nid, flags, p_start, p_end, p_nid)
240 static inline void memblock_set_region_flags(struct memblock_region
*r
,
246 static inline void memblock_clear_region_flags(struct memblock_region
*r
,
252 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
253 int memblock_set_node(phys_addr_t base
, phys_addr_t size
,
254 struct memblock_type
*type
, int nid
);
256 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
261 static inline int memblock_get_region_node(const struct memblock_region
*r
)
266 static inline void memblock_set_region_node(struct memblock_region
*r
, int nid
)
270 static inline int memblock_get_region_node(const struct memblock_region
*r
)
274 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
276 phys_addr_t
memblock_alloc_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
277 phys_addr_t
memblock_alloc_try_nid(phys_addr_t size
, phys_addr_t align
, int nid
);
279 phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
);
282 * Set the allocation direction to bottom-up or top-down.
284 static inline void __init
memblock_set_bottom_up(bool enable
)
286 memblock
.bottom_up
= enable
;
290 * Check if the allocation direction is bottom-up or not.
291 * if this is true, that said, memblock will allocate memory
292 * in bottom-up direction.
294 static inline bool memblock_bottom_up(void)
296 return memblock
.bottom_up
;
299 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
300 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
301 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
303 phys_addr_t __init
memblock_alloc_range(phys_addr_t size
, phys_addr_t align
,
304 phys_addr_t start
, phys_addr_t end
,
306 phys_addr_t
memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
307 phys_addr_t max_addr
);
308 phys_addr_t
__memblock_alloc_base(phys_addr_t size
, phys_addr_t align
,
309 phys_addr_t max_addr
);
310 phys_addr_t
memblock_phys_mem_size(void);
311 phys_addr_t
memblock_reserved_size(void);
312 phys_addr_t
memblock_mem_size(unsigned long limit_pfn
);
313 phys_addr_t
memblock_start_of_DRAM(void);
314 phys_addr_t
memblock_end_of_DRAM(void);
315 void memblock_enforce_memory_limit(phys_addr_t memory_limit
);
316 void memblock_cap_memory_range(phys_addr_t base
, phys_addr_t size
);
317 void memblock_mem_limit_remove_map(phys_addr_t limit
);
318 bool memblock_is_memory(phys_addr_t addr
);
319 int memblock_is_map_memory(phys_addr_t addr
);
320 int memblock_is_region_memory(phys_addr_t base
, phys_addr_t size
);
321 bool memblock_is_reserved(phys_addr_t addr
);
322 bool memblock_is_region_reserved(phys_addr_t base
, phys_addr_t size
);
324 extern void __memblock_dump_all(void);
326 static inline void memblock_dump_all(void)
329 __memblock_dump_all();
333 * memblock_set_current_limit - Set the current allocation limit to allow
334 * limiting allocations to what is currently
335 * accessible during boot
336 * @limit: New limit value (physical address)
338 void memblock_set_current_limit(phys_addr_t limit
);
341 phys_addr_t
memblock_get_current_limit(void);
344 * pfn conversion functions
346 * While the memory MEMBLOCKs should always be page aligned, the reserved
347 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
348 * idea of what they return for such non aligned MEMBLOCKs.
352 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
353 * @reg: memblock_region structure
355 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region
*reg
)
357 return PFN_UP(reg
->base
);
361 * memblock_region_memory_end_pfn - Return the end_pfn this region
362 * @reg: memblock_region structure
364 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region
*reg
)
366 return PFN_DOWN(reg
->base
+ reg
->size
);
370 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
371 * @reg: memblock_region structure
373 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region
*reg
)
375 return PFN_DOWN(reg
->base
);
379 * memblock_region_reserved_end_pfn - Return the end_pfn this region
380 * @reg: memblock_region structure
382 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region
*reg
)
384 return PFN_UP(reg
->base
+ reg
->size
);
387 #define for_each_memblock(memblock_type, region) \
388 for (region = memblock.memblock_type.regions; \
389 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
392 #define for_each_memblock_type(memblock_type, rgn) \
393 for (idx = 0, rgn = &memblock_type->regions[0]; \
394 idx < memblock_type->cnt; \
395 idx++, rgn = &memblock_type->regions[idx])
397 #ifdef CONFIG_MEMTEST
398 extern void early_memtest(phys_addr_t start
, phys_addr_t end
);
400 static inline void early_memtest(phys_addr_t start
, phys_addr_t end
)
405 extern unsigned long memblock_reserved_memory_within(phys_addr_t start_addr
,
406 phys_addr_t end_addr
);
408 static inline phys_addr_t
memblock_alloc(phys_addr_t size
, phys_addr_t align
)
413 static inline unsigned long memblock_reserved_memory_within(phys_addr_t start_addr
,
414 phys_addr_t end_addr
)
419 #endif /* CONFIG_HAVE_MEMBLOCK */
421 #endif /* __KERNEL__ */
423 #endif /* _LINUX_MEMBLOCK_H */