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 */
30 struct memblock_region {
34 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
39 struct memblock_type {
40 unsigned long cnt; /* number of regions */
41 unsigned long max; /* size of the allocated array */
42 phys_addr_t total_size; /* size of all regions */
43 struct memblock_region *regions;
47 bool bottom_up; /* is bottom up direction? */
48 phys_addr_t current_limit;
49 struct memblock_type memory;
50 struct memblock_type reserved;
51 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
52 struct memblock_type physmem;
56 extern struct memblock memblock;
57 extern int memblock_debug;
58 #ifdef CONFIG_MOVABLE_NODE
59 /* If movable_node boot option specified */
60 extern bool movable_node_enabled;
61 #endif /* CONFIG_MOVABLE_NODE */
63 #define memblock_dbg(fmt, ...) \
64 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
66 phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
67 phys_addr_t start, phys_addr_t end,
68 int nid, ulong flags);
69 phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
70 phys_addr_t size, phys_addr_t align);
71 phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
72 phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
73 void memblock_allow_resize(void);
74 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
75 int memblock_add(phys_addr_t base, phys_addr_t size);
76 int memblock_remove(phys_addr_t base, phys_addr_t size);
77 int memblock_free(phys_addr_t base, phys_addr_t size);
78 int memblock_reserve(phys_addr_t base, phys_addr_t size);
79 void memblock_trim_memory(phys_addr_t align);
80 bool memblock_overlaps_region(struct memblock_type *type,
81 phys_addr_t base, phys_addr_t size);
82 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
83 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
84 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
85 ulong choose_memblock_flags(void);
87 /* Low level functions */
88 int memblock_add_range(struct memblock_type *type,
89 phys_addr_t base, phys_addr_t size,
90 int nid, unsigned long flags);
92 int memblock_remove_range(struct memblock_type *type,
96 void __next_mem_range(u64 *idx, int nid, ulong flags,
97 struct memblock_type *type_a,
98 struct memblock_type *type_b, phys_addr_t *out_start,
99 phys_addr_t *out_end, int *out_nid);
101 void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
102 struct memblock_type *type_a,
103 struct memblock_type *type_b, phys_addr_t *out_start,
104 phys_addr_t *out_end, int *out_nid);
106 void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
107 phys_addr_t *out_end);
110 * for_each_mem_range - iterate through memblock areas from type_a and not
111 * included in type_b. Or just type_a if type_b is NULL.
112 * @i: u64 used as loop variable
113 * @type_a: ptr to memblock_type to iterate
114 * @type_b: ptr to memblock_type which excludes from the iteration
115 * @nid: node selector, %NUMA_NO_NODE for all nodes
116 * @flags: pick from blocks based on memory attributes
117 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
118 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
119 * @p_nid: ptr to int for nid of the range, can be %NULL
121 #define for_each_mem_range(i, type_a, type_b, nid, flags, \
122 p_start, p_end, p_nid) \
123 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
124 p_start, p_end, p_nid); \
125 i != (u64)ULLONG_MAX; \
126 __next_mem_range(&i, nid, flags, type_a, type_b, \
127 p_start, p_end, p_nid))
130 * for_each_mem_range_rev - reverse iterate through memblock areas from
131 * type_a and not included in type_b. Or just type_a if type_b is NULL.
132 * @i: u64 used as loop variable
133 * @type_a: ptr to memblock_type to iterate
134 * @type_b: ptr to memblock_type which excludes from the iteration
135 * @nid: node selector, %NUMA_NO_NODE for all nodes
136 * @flags: pick from blocks based on memory attributes
137 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
138 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
139 * @p_nid: ptr to int for nid of the range, can be %NULL
141 #define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
142 p_start, p_end, p_nid) \
143 for (i = (u64)ULLONG_MAX, \
144 __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
145 p_start, p_end, p_nid); \
146 i != (u64)ULLONG_MAX; \
147 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
148 p_start, p_end, p_nid))
151 * for_each_reserved_mem_region - iterate over all reserved memblock areas
152 * @i: u64 used as loop variable
153 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
154 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
156 * Walks over reserved areas of memblock. Available as soon as memblock
159 #define for_each_reserved_mem_region(i, p_start, p_end) \
161 __next_reserved_mem_region(&i, p_start, p_end); \
162 i != (u64)ULLONG_MAX; \
163 __next_reserved_mem_region(&i, p_start, p_end))
165 #ifdef CONFIG_MOVABLE_NODE
166 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
168 return m->flags & MEMBLOCK_HOTPLUG;
171 static inline bool movable_node_is_enabled(void)
173 return movable_node_enabled;
176 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
180 static inline bool movable_node_is_enabled(void)
186 static inline bool memblock_is_mirror(struct memblock_region *m)
188 return m->flags & MEMBLOCK_MIRROR;
191 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
192 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
193 unsigned long *end_pfn);
194 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
195 unsigned long *out_end_pfn, int *out_nid);
198 * for_each_mem_pfn_range - early memory pfn range iterator
199 * @i: an integer used as loop variable
200 * @nid: node selector, %MAX_NUMNODES for all nodes
201 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
202 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
203 * @p_nid: ptr to int for nid of the range, can be %NULL
205 * Walks over configured memory ranges.
207 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
208 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
209 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
210 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
213 * for_each_free_mem_range - iterate through free memblock areas
214 * @i: u64 used as loop variable
215 * @nid: node selector, %NUMA_NO_NODE for all nodes
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 * @p_nid: ptr to int for nid of the range, can be %NULL
219 * @flags: pick from blocks based on memory attributes
221 * Walks over free (memory && !reserved) areas of memblock. Available as
222 * soon as memblock is initialized.
224 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
225 for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
226 nid, flags, p_start, p_end, p_nid)
229 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
230 * @i: u64 used as loop variable
231 * @nid: node selector, %NUMA_NO_NODE for all nodes
232 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
233 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
234 * @p_nid: ptr to int for nid of the range, can be %NULL
235 * @flags: pick from blocks based on memory attributes
237 * Walks over free (memory && !reserved) areas of memblock in reverse
238 * order. Available as soon as memblock is initialized.
240 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
242 for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
243 nid, flags, p_start, p_end, p_nid)
245 static inline void memblock_set_region_flags(struct memblock_region *r,
251 static inline void memblock_clear_region_flags(struct memblock_region *r,
257 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
258 int memblock_set_node(phys_addr_t base, phys_addr_t size,
259 struct memblock_type *type, int nid);
261 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
266 static inline int memblock_get_region_node(const struct memblock_region *r)
271 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
275 static inline int memblock_get_region_node(const struct memblock_region *r)
279 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
281 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
282 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
284 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
286 #ifdef CONFIG_MOVABLE_NODE
288 * Set the allocation direction to bottom-up or top-down.
290 static inline void __init memblock_set_bottom_up(bool enable)
292 memblock.bottom_up = enable;
296 * Check if the allocation direction is bottom-up or not.
297 * if this is true, that said, memblock will allocate memory
298 * in bottom-up direction.
300 static inline bool memblock_bottom_up(void)
302 return memblock.bottom_up;
305 static inline void __init memblock_set_bottom_up(bool enable) {}
306 static inline bool memblock_bottom_up(void) { return false; }
309 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
310 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
311 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
313 phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
314 phys_addr_t start, phys_addr_t end,
316 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
317 phys_addr_t max_addr);
318 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
319 phys_addr_t max_addr);
320 phys_addr_t memblock_phys_mem_size(void);
321 phys_addr_t memblock_mem_size(unsigned long limit_pfn);
322 phys_addr_t memblock_start_of_DRAM(void);
323 phys_addr_t memblock_end_of_DRAM(void);
324 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
325 int memblock_is_memory(phys_addr_t addr);
326 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
327 int memblock_is_reserved(phys_addr_t addr);
328 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
330 extern void __memblock_dump_all(void);
332 static inline void memblock_dump_all(void)
335 __memblock_dump_all();
339 * memblock_set_current_limit - Set the current allocation limit to allow
340 * limiting allocations to what is currently
341 * accessible during boot
342 * @limit: New limit value (physical address)
344 void memblock_set_current_limit(phys_addr_t limit);
347 phys_addr_t memblock_get_current_limit(void);
350 * pfn conversion functions
352 * While the memory MEMBLOCKs should always be page aligned, the reserved
353 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
354 * idea of what they return for such non aligned MEMBLOCKs.
358 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
359 * @reg: memblock_region structure
361 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
363 return PFN_UP(reg->base);
367 * memblock_region_memory_end_pfn - Return the end_pfn this region
368 * @reg: memblock_region structure
370 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
372 return PFN_DOWN(reg->base + reg->size);
376 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
377 * @reg: memblock_region structure
379 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
381 return PFN_DOWN(reg->base);
385 * memblock_region_reserved_end_pfn - Return the end_pfn this region
386 * @reg: memblock_region structure
388 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
390 return PFN_UP(reg->base + reg->size);
393 #define for_each_memblock(memblock_type, region) \
394 for (region = memblock.memblock_type.regions; \
395 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
399 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
400 #define __init_memblock __meminit
401 #define __initdata_memblock __meminitdata
403 #define __init_memblock
404 #define __initdata_memblock
407 #ifdef CONFIG_MEMTEST
408 extern void early_memtest(phys_addr_t start, phys_addr_t end);
410 static inline void early_memtest(phys_addr_t start, phys_addr_t end)
416 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
421 #endif /* CONFIG_HAVE_MEMBLOCK */
423 #endif /* __KERNEL__ */
425 #endif /* _LINUX_MEMBLOCK_H */