1#ifndef _LINUX_MEMBLOCK_H
2#define _LINUX_MEMBLOCK_H
3#ifdef __KERNEL__
4
5#ifdef CONFIG_HAVE_MEMBLOCK
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17#include <linux/init.h>
18#include <linux/mm.h>
19
20#define INIT_MEMBLOCK_REGIONS 128
21#define INIT_PHYSMEM_REGIONS 4
22
23
24enum {
25 MEMBLOCK_NONE = 0x0,
26 MEMBLOCK_HOTPLUG = 0x1,
27 MEMBLOCK_MIRROR = 0x2,
28 MEMBLOCK_NOMAP = 0x4,
29};
30
31struct memblock_region {
32 phys_addr_t base;
33 phys_addr_t size;
34 unsigned long flags;
35#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
36 int nid;
37#endif
38};
39
40struct memblock_type {
41 unsigned long cnt;
42 unsigned long max;
43 phys_addr_t total_size;
44 struct memblock_region *regions;
45 char *name;
46};
47
48struct memblock {
49 bool bottom_up;
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;
55#endif
56};
57
58extern struct memblock memblock;
59extern int memblock_debug;
60
61#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
62#define __init_memblock __meminit
63#define __initdata_memblock __meminitdata
64void memblock_discard(void);
65#else
66#define __init_memblock
67#define __initdata_memblock
68#endif
69
70#define memblock_dbg(fmt, ...) \
71 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
72
73phys_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);
76phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
77 phys_addr_t size, phys_addr_t align);
78void memblock_allow_resize(void);
79int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
80int memblock_add(phys_addr_t base, phys_addr_t size);
81int memblock_remove(phys_addr_t base, phys_addr_t size);
82int memblock_free(phys_addr_t base, phys_addr_t size);
83int memblock_reserve(phys_addr_t base, phys_addr_t size);
84void memblock_trim_memory(phys_addr_t align);
85bool memblock_overlaps_region(struct memblock_type *type,
86 phys_addr_t base, phys_addr_t size);
87int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
88int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
89int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
90int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
91int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
92ulong choose_memblock_flags(void);
93
94
95int memblock_add_range(struct memblock_type *type,
96 phys_addr_t base, phys_addr_t size,
97 int nid, unsigned long flags);
98
99void __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);
103
104void __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);
108
109void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
110 phys_addr_t *out_end);
111
112void __memblock_free_early(phys_addr_t base, phys_addr_t size);
113void __memblock_free_late(phys_addr_t base, phys_addr_t size);
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126
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))
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146
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))
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164
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))
169
170static inline bool memblock_is_hotpluggable(struct memblock_region *m)
171{
172 return m->flags & MEMBLOCK_HOTPLUG;
173}
174
175static inline bool memblock_is_mirror(struct memblock_region *m)
176{
177 return m->flags & MEMBLOCK_MIRROR;
178}
179
180static inline bool memblock_is_nomap(struct memblock_region *m)
181{
182 return m->flags & MEMBLOCK_NOMAP;
183}
184
185#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
186int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
187 unsigned long *end_pfn);
188void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
189 unsigned long *out_end_pfn, int *out_nid);
190unsigned long memblock_next_valid_pfn(unsigned long pfn, unsigned long max_pfn);
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201
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
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218
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)
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234
235#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
236 p_nid) \
237 for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
238 nid, flags, p_start, p_end, p_nid)
239
240static inline void memblock_set_region_flags(struct memblock_region *r,
241 unsigned long flags)
242{
243 r->flags |= flags;
244}
245
246static inline void memblock_clear_region_flags(struct memblock_region *r,
247 unsigned long flags)
248{
249 r->flags &= ~flags;
250}
251
252#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
253int memblock_set_node(phys_addr_t base, phys_addr_t size,
254 struct memblock_type *type, int nid);
255
256static inline void memblock_set_region_node(struct memblock_region *r, int nid)
257{
258 r->nid = nid;
259}
260
261static inline int memblock_get_region_node(const struct memblock_region *r)
262{
263 return r->nid;
264}
265#else
266static inline void memblock_set_region_node(struct memblock_region *r, int nid)
267{
268}
269
270static inline int memblock_get_region_node(const struct memblock_region *r)
271{
272 return 0;
273}
274#endif
275
276phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
277phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
278
279phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
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283
284static inline void __init memblock_set_bottom_up(bool enable)
285{
286 memblock.bottom_up = enable;
287}
288
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293
294static inline bool memblock_bottom_up(void)
295{
296 return memblock.bottom_up;
297}
298
299
300#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
301#define MEMBLOCK_ALLOC_ACCESSIBLE 0
302
303phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
304 phys_addr_t start, phys_addr_t end,
305 ulong flags);
306phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
307 phys_addr_t max_addr);
308phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
309 phys_addr_t max_addr);
310phys_addr_t memblock_phys_mem_size(void);
311phys_addr_t memblock_reserved_size(void);
312phys_addr_t memblock_mem_size(unsigned long limit_pfn);
313phys_addr_t memblock_start_of_DRAM(void);
314phys_addr_t memblock_end_of_DRAM(void);
315void memblock_enforce_memory_limit(phys_addr_t memory_limit);
316void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
317void memblock_mem_limit_remove_map(phys_addr_t limit);
318bool memblock_is_memory(phys_addr_t addr);
319int memblock_is_map_memory(phys_addr_t addr);
320int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
321bool memblock_is_reserved(phys_addr_t addr);
322bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
323
324extern void __memblock_dump_all(void);
325
326static inline void memblock_dump_all(void)
327{
328 if (memblock_debug)
329 __memblock_dump_all();
330}
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337
338void memblock_set_current_limit(phys_addr_t limit);
339
340
341phys_addr_t memblock_get_current_limit(void);
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355static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
356{
357 return PFN_UP(reg->base);
358}
359
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364static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
365{
366 return PFN_DOWN(reg->base + reg->size);
367}
368
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373static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
374{
375 return PFN_DOWN(reg->base);
376}
377
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381
382static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
383{
384 return PFN_UP(reg->base + reg->size);
385}
386
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); \
390 region++)
391
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])
396
397#ifdef CONFIG_MEMTEST
398extern void early_memtest(phys_addr_t start, phys_addr_t end);
399#else
400static inline void early_memtest(phys_addr_t start, phys_addr_t end)
401{
402}
403#endif
404
405extern unsigned long memblock_reserved_memory_within(phys_addr_t start_addr,
406 phys_addr_t end_addr);
407#else
408static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
409{
410 return 0;
411}
412
413static inline unsigned long memblock_reserved_memory_within(phys_addr_t start_addr,
414 phys_addr_t end_addr)
415{
416 return 0;
417}
418
419#endif
420
421#endif
422
423#endif
424