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;
60 #ifdef CONFIG_MOVABLE_NODE
61 /* If movable_node boot option specified */
62 extern bool movable_node_enabled;
63 #endif /* CONFIG_MOVABLE_NODE */
65 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
66 #define __init_memblock __meminit
67 #define __initdata_memblock __meminitdata
69 #define __init_memblock
70 #define __initdata_memblock
73 #define memblock_dbg(fmt, ...) \
74 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
76 phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
77 phys_addr_t start, phys_addr_t end,
78 int nid, ulong flags);
79 phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
80 phys_addr_t size, phys_addr_t align);
81 phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
82 phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
83 void memblock_allow_resize(void);
84 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
85 int memblock_add(phys_addr_t base, phys_addr_t size);
86 int memblock_remove(phys_addr_t base, phys_addr_t size);
87 int memblock_free(phys_addr_t base, phys_addr_t size);
88 int memblock_reserve(phys_addr_t base, phys_addr_t size);
89 void memblock_trim_memory(phys_addr_t align);
90 bool memblock_overlaps_region(struct memblock_type *type,
91 phys_addr_t base, phys_addr_t size);
92 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
93 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
94 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
95 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
96 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
97 ulong choose_memblock_flags(void);
99 /* Low level functions */
100 int memblock_add_range(struct memblock_type *type,
101 phys_addr_t base, phys_addr_t size,
102 int nid, unsigned long flags);
104 void __next_mem_range(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_mem_range_rev(u64 *idx, int nid, ulong flags,
110 struct memblock_type *type_a,
111 struct memblock_type *type_b, phys_addr_t *out_start,
112 phys_addr_t *out_end, int *out_nid);
114 void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
115 phys_addr_t *out_end);
118 * for_each_mem_range - iterate through memblock areas from type_a and not
119 * included in type_b. Or just type_a if type_b is NULL.
120 * @i: u64 used as loop variable
121 * @type_a: ptr to memblock_type to iterate
122 * @type_b: ptr to memblock_type which excludes from the iteration
123 * @nid: node selector, %NUMA_NO_NODE for all nodes
124 * @flags: pick from blocks based on memory attributes
125 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
126 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
127 * @p_nid: ptr to int for nid of the range, can be %NULL
129 #define for_each_mem_range(i, type_a, type_b, nid, flags, \
130 p_start, p_end, p_nid) \
131 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
132 p_start, p_end, p_nid); \
133 i != (u64)ULLONG_MAX; \
134 __next_mem_range(&i, nid, flags, type_a, type_b, \
135 p_start, p_end, p_nid))
138 * for_each_mem_range_rev - reverse iterate through memblock areas from
139 * type_a and not included in type_b. Or just type_a if type_b is NULL.
140 * @i: u64 used as loop variable
141 * @type_a: ptr to memblock_type to iterate
142 * @type_b: ptr to memblock_type which excludes from the iteration
143 * @nid: node selector, %NUMA_NO_NODE for all nodes
144 * @flags: pick from blocks based on memory attributes
145 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
146 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
147 * @p_nid: ptr to int for nid of the range, can be %NULL
149 #define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
150 p_start, p_end, p_nid) \
151 for (i = (u64)ULLONG_MAX, \
152 __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
153 p_start, p_end, p_nid); \
154 i != (u64)ULLONG_MAX; \
155 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
156 p_start, p_end, p_nid))
159 * for_each_reserved_mem_region - iterate over all reserved memblock areas
160 * @i: u64 used as loop variable
161 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
162 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
164 * Walks over reserved areas of memblock. Available as soon as memblock
167 #define for_each_reserved_mem_region(i, p_start, p_end) \
168 for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \
169 i != (u64)ULLONG_MAX; \
170 __next_reserved_mem_region(&i, p_start, p_end))
172 #ifdef CONFIG_MOVABLE_NODE
173 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
175 return m->flags & MEMBLOCK_HOTPLUG;
178 static inline bool __init_memblock movable_node_is_enabled(void)
180 return movable_node_enabled;
183 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
187 static inline bool movable_node_is_enabled(void)
193 static inline bool memblock_is_mirror(struct memblock_region *m)
195 return m->flags & MEMBLOCK_MIRROR;
198 static inline bool memblock_is_nomap(struct memblock_region *m)
200 return m->flags & MEMBLOCK_NOMAP;
203 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
204 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
205 unsigned long *end_pfn);
206 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
207 unsigned long *out_end_pfn, int *out_nid);
208 unsigned long memblock_next_valid_pfn(unsigned long pfn, unsigned long max_pfn);
211 * for_each_mem_pfn_range - early memory pfn range iterator
212 * @i: an integer used as loop variable
213 * @nid: node selector, %MAX_NUMNODES for all nodes
214 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
215 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
216 * @p_nid: ptr to int for nid of the range, can be %NULL
218 * Walks over configured memory ranges.
220 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
221 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
222 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
223 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
226 * for_each_free_mem_range - iterate through free memblock areas
227 * @i: u64 used as loop variable
228 * @nid: node selector, %NUMA_NO_NODE for all nodes
229 * @flags: pick from blocks based on memory attributes
230 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
231 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
232 * @p_nid: ptr to int for nid of the range, can be %NULL
234 * Walks over free (memory && !reserved) areas of memblock. Available as
235 * soon as memblock is initialized.
237 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
238 for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
239 nid, flags, p_start, p_end, p_nid)
242 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
243 * @i: u64 used as loop variable
244 * @nid: node selector, %NUMA_NO_NODE for all nodes
245 * @flags: pick from blocks based on memory attributes
246 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
247 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
248 * @p_nid: ptr to int for nid of the range, can be %NULL
250 * Walks over free (memory && !reserved) areas of memblock in reverse
251 * order. Available as soon as memblock is initialized.
253 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
255 for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
256 nid, flags, p_start, p_end, p_nid)
258 static inline void memblock_set_region_flags(struct memblock_region *r,
264 static inline void memblock_clear_region_flags(struct memblock_region *r,
270 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
271 int memblock_set_node(phys_addr_t base, phys_addr_t size,
272 struct memblock_type *type, int nid);
274 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
279 static inline int memblock_get_region_node(const struct memblock_region *r)
284 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
288 static inline int memblock_get_region_node(const struct memblock_region *r)
292 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
294 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
295 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
297 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
299 #ifdef CONFIG_MOVABLE_NODE
301 * Set the allocation direction to bottom-up or top-down.
303 static inline void __init memblock_set_bottom_up(bool enable)
305 memblock.bottom_up = enable;
309 * Check if the allocation direction is bottom-up or not.
310 * if this is true, that said, memblock will allocate memory
311 * in bottom-up direction.
313 static inline bool memblock_bottom_up(void)
315 return memblock.bottom_up;
318 static inline void __init memblock_set_bottom_up(bool enable) {}
319 static inline bool memblock_bottom_up(void) { return false; }
322 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
323 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
324 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
326 phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
327 phys_addr_t start, phys_addr_t end,
329 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
330 phys_addr_t max_addr);
331 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
332 phys_addr_t max_addr);
333 phys_addr_t memblock_phys_mem_size(void);
334 phys_addr_t memblock_reserved_size(void);
335 phys_addr_t memblock_mem_size(unsigned long limit_pfn);
336 phys_addr_t memblock_start_of_DRAM(void);
337 phys_addr_t memblock_end_of_DRAM(void);
338 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
339 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
340 void memblock_mem_limit_remove_map(phys_addr_t limit);
341 bool memblock_is_memory(phys_addr_t addr);
342 int memblock_is_map_memory(phys_addr_t addr);
343 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
344 bool memblock_is_reserved(phys_addr_t addr);
345 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
347 extern void __memblock_dump_all(void);
349 static inline void memblock_dump_all(void)
352 __memblock_dump_all();
356 * memblock_set_current_limit - Set the current allocation limit to allow
357 * limiting allocations to what is currently
358 * accessible during boot
359 * @limit: New limit value (physical address)
361 void memblock_set_current_limit(phys_addr_t limit);
364 phys_addr_t memblock_get_current_limit(void);
367 * pfn conversion functions
369 * While the memory MEMBLOCKs should always be page aligned, the reserved
370 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
371 * idea of what they return for such non aligned MEMBLOCKs.
375 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
376 * @reg: memblock_region structure
378 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
380 return PFN_UP(reg->base);
384 * memblock_region_memory_end_pfn - Return the end_pfn this region
385 * @reg: memblock_region structure
387 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
389 return PFN_DOWN(reg->base + reg->size);
393 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
394 * @reg: memblock_region structure
396 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
398 return PFN_DOWN(reg->base);
402 * memblock_region_reserved_end_pfn - Return the end_pfn this region
403 * @reg: memblock_region structure
405 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
407 return PFN_UP(reg->base + reg->size);
410 #define for_each_memblock(memblock_type, region) \
411 for (region = memblock.memblock_type.regions; \
412 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
415 #define for_each_memblock_type(memblock_type, rgn) \
416 for (idx = 0, rgn = &memblock_type->regions[0]; \
417 idx < memblock_type->cnt; \
418 idx++, rgn = &memblock_type->regions[idx])
420 #ifdef CONFIG_MEMTEST
421 extern void early_memtest(phys_addr_t start, phys_addr_t end);
423 static inline void early_memtest(phys_addr_t start, phys_addr_t end)
428 extern unsigned long memblock_reserved_memory_within(phys_addr_t start_addr,
429 phys_addr_t end_addr);
431 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
436 static inline unsigned long memblock_reserved_memory_within(phys_addr_t start_addr,
437 phys_addr_t end_addr)
442 #endif /* CONFIG_HAVE_MEMBLOCK */
444 #endif /* __KERNEL__ */
446 #endif /* _LINUX_MEMBLOCK_H */