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 ulong choose_memblock_flags(void);
98 /* Low level functions */
99 int memblock_add_range(struct memblock_type *type,
100 phys_addr_t base, phys_addr_t size,
101 int nid, unsigned long flags);
103 void __next_mem_range(u64 *idx, int nid, ulong flags,
104 struct memblock_type *type_a,
105 struct memblock_type *type_b, phys_addr_t *out_start,
106 phys_addr_t *out_end, int *out_nid);
108 void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
109 struct memblock_type *type_a,
110 struct memblock_type *type_b, phys_addr_t *out_start,
111 phys_addr_t *out_end, int *out_nid);
113 void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
114 phys_addr_t *out_end);
117 * for_each_mem_range - iterate through memblock areas from type_a and not
118 * included in type_b. Or just type_a if type_b is NULL.
119 * @i: u64 used as loop variable
120 * @type_a: ptr to memblock_type to iterate
121 * @type_b: ptr to memblock_type which excludes from the iteration
122 * @nid: node selector, %NUMA_NO_NODE for all nodes
123 * @flags: pick from blocks based on memory attributes
124 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
125 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
126 * @p_nid: ptr to int for nid of the range, can be %NULL
128 #define for_each_mem_range(i, type_a, type_b, nid, flags, \
129 p_start, p_end, p_nid) \
130 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
131 p_start, p_end, p_nid); \
132 i != (u64)ULLONG_MAX; \
133 __next_mem_range(&i, nid, flags, type_a, type_b, \
134 p_start, p_end, p_nid))
137 * for_each_mem_range_rev - reverse iterate through memblock areas from
138 * type_a and not included in type_b. Or just type_a if type_b is NULL.
139 * @i: u64 used as loop variable
140 * @type_a: ptr to memblock_type to iterate
141 * @type_b: ptr to memblock_type which excludes from the iteration
142 * @nid: node selector, %NUMA_NO_NODE for all nodes
143 * @flags: pick from blocks based on memory attributes
144 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
145 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
146 * @p_nid: ptr to int for nid of the range, can be %NULL
148 #define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
149 p_start, p_end, p_nid) \
150 for (i = (u64)ULLONG_MAX, \
151 __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
152 p_start, p_end, p_nid); \
153 i != (u64)ULLONG_MAX; \
154 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \
155 p_start, p_end, p_nid))
158 * for_each_reserved_mem_region - iterate over all reserved memblock areas
159 * @i: u64 used as loop variable
160 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
161 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
163 * Walks over reserved areas of memblock. Available as soon as memblock
166 #define for_each_reserved_mem_region(i, p_start, p_end) \
167 for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \
168 i != (u64)ULLONG_MAX; \
169 __next_reserved_mem_region(&i, p_start, p_end))
171 #ifdef CONFIG_MOVABLE_NODE
172 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
174 return m->flags & MEMBLOCK_HOTPLUG;
177 static inline bool __init_memblock movable_node_is_enabled(void)
179 return movable_node_enabled;
182 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
186 static inline bool movable_node_is_enabled(void)
192 static inline bool memblock_is_mirror(struct memblock_region *m)
194 return m->flags & MEMBLOCK_MIRROR;
197 static inline bool memblock_is_nomap(struct memblock_region *m)
199 return m->flags & MEMBLOCK_NOMAP;
202 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
203 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
204 unsigned long *end_pfn);
205 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
206 unsigned long *out_end_pfn, int *out_nid);
207 unsigned long memblock_next_valid_pfn(unsigned long pfn, unsigned long max_pfn);
210 * for_each_mem_pfn_range - early memory pfn range iterator
211 * @i: an integer used as loop variable
212 * @nid: node selector, %MAX_NUMNODES for all nodes
213 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
214 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
215 * @p_nid: ptr to int for nid of the range, can be %NULL
217 * Walks over configured memory ranges.
219 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
220 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
221 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
222 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
225 * for_each_free_mem_range - iterate through free memblock areas
226 * @i: u64 used as loop variable
227 * @nid: node selector, %NUMA_NO_NODE for all nodes
228 * @flags: pick from blocks based on memory attributes
229 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
230 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
231 * @p_nid: ptr to int for nid of the range, can be %NULL
233 * Walks over free (memory && !reserved) areas of memblock. Available as
234 * soon as memblock is initialized.
236 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
237 for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
238 nid, flags, p_start, p_end, p_nid)
241 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
242 * @i: u64 used as loop variable
243 * @nid: node selector, %NUMA_NO_NODE for all nodes
244 * @flags: pick from blocks based on memory attributes
245 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
246 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
247 * @p_nid: ptr to int for nid of the range, can be %NULL
249 * Walks over free (memory && !reserved) areas of memblock in reverse
250 * order. Available as soon as memblock is initialized.
252 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
254 for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
255 nid, flags, p_start, p_end, p_nid)
257 static inline void memblock_set_region_flags(struct memblock_region *r,
263 static inline void memblock_clear_region_flags(struct memblock_region *r,
269 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
270 int memblock_set_node(phys_addr_t base, phys_addr_t size,
271 struct memblock_type *type, int nid);
273 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
278 static inline int memblock_get_region_node(const struct memblock_region *r)
283 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
287 static inline int memblock_get_region_node(const struct memblock_region *r)
291 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
293 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
294 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
296 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
298 #ifdef CONFIG_MOVABLE_NODE
300 * Set the allocation direction to bottom-up or top-down.
302 static inline void __init memblock_set_bottom_up(bool enable)
304 memblock.bottom_up = enable;
308 * Check if the allocation direction is bottom-up or not.
309 * if this is true, that said, memblock will allocate memory
310 * in bottom-up direction.
312 static inline bool memblock_bottom_up(void)
314 return memblock.bottom_up;
317 static inline void __init memblock_set_bottom_up(bool enable) {}
318 static inline bool memblock_bottom_up(void) { return false; }
321 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
322 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
323 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
325 phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
326 phys_addr_t start, phys_addr_t end,
328 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
329 phys_addr_t max_addr);
330 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
331 phys_addr_t max_addr);
332 phys_addr_t memblock_phys_mem_size(void);
333 phys_addr_t memblock_reserved_size(void);
334 phys_addr_t memblock_mem_size(unsigned long limit_pfn);
335 phys_addr_t memblock_start_of_DRAM(void);
336 phys_addr_t memblock_end_of_DRAM(void);
337 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
338 void memblock_mem_limit_remove_map(phys_addr_t limit);
339 bool memblock_is_memory(phys_addr_t addr);
340 int memblock_is_map_memory(phys_addr_t addr);
341 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
342 bool memblock_is_reserved(phys_addr_t addr);
343 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
345 extern void __memblock_dump_all(void);
347 static inline void memblock_dump_all(void)
350 __memblock_dump_all();
354 * memblock_set_current_limit - Set the current allocation limit to allow
355 * limiting allocations to what is currently
356 * accessible during boot
357 * @limit: New limit value (physical address)
359 void memblock_set_current_limit(phys_addr_t limit);
362 phys_addr_t memblock_get_current_limit(void);
365 * pfn conversion functions
367 * While the memory MEMBLOCKs should always be page aligned, the reserved
368 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
369 * idea of what they return for such non aligned MEMBLOCKs.
373 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
374 * @reg: memblock_region structure
376 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
378 return PFN_UP(reg->base);
382 * memblock_region_memory_end_pfn - Return the end_pfn this region
383 * @reg: memblock_region structure
385 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
387 return PFN_DOWN(reg->base + reg->size);
391 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
392 * @reg: memblock_region structure
394 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
396 return PFN_DOWN(reg->base);
400 * memblock_region_reserved_end_pfn - Return the end_pfn this region
401 * @reg: memblock_region structure
403 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
405 return PFN_UP(reg->base + reg->size);
408 #define for_each_memblock(memblock_type, region) \
409 for (region = memblock.memblock_type.regions; \
410 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
413 #define for_each_memblock_type(memblock_type, rgn) \
414 for (idx = 0, rgn = &memblock_type->regions[0]; \
415 idx < memblock_type->cnt; \
416 idx++, rgn = &memblock_type->regions[idx])
418 #ifdef CONFIG_MEMTEST
419 extern void early_memtest(phys_addr_t start, phys_addr_t end);
421 static inline void early_memtest(phys_addr_t start, phys_addr_t end)
427 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
432 #endif /* CONFIG_HAVE_MEMBLOCK */
434 #endif /* __KERNEL__ */
436 #endif /* _LINUX_MEMBLOCK_H */