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
22 /* Definition of memblock flags. */
23 #define MEMBLOCK_HOTPLUG 0x1 /* hotpluggable region */
25 struct memblock_region {
29 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
34 struct memblock_type {
35 unsigned long cnt; /* number of regions */
36 unsigned long max; /* size of the allocated array */
37 phys_addr_t total_size; /* size of all regions */
38 struct memblock_region *regions;
42 bool bottom_up; /* is bottom up direction? */
43 phys_addr_t current_limit;
44 struct memblock_type memory;
45 struct memblock_type reserved;
48 extern struct memblock memblock;
49 extern int memblock_debug;
51 #define memblock_dbg(fmt, ...) \
52 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
54 phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end,
55 phys_addr_t size, phys_addr_t align, int nid);
56 phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
57 phys_addr_t size, phys_addr_t align);
58 phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
59 void memblock_allow_resize(void);
60 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
61 int memblock_add(phys_addr_t base, phys_addr_t size);
62 int memblock_remove(phys_addr_t base, phys_addr_t size);
63 int memblock_free(phys_addr_t base, phys_addr_t size);
64 int memblock_reserve(phys_addr_t base, phys_addr_t size);
65 void memblock_trim_memory(phys_addr_t align);
66 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
67 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
69 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
70 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
71 unsigned long *end_pfn);
72 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
73 unsigned long *out_end_pfn, int *out_nid);
76 * for_each_mem_pfn_range - early memory pfn range iterator
77 * @i: an integer used as loop variable
78 * @nid: node selector, %MAX_NUMNODES for all nodes
79 * @p_start: ptr to ulong for start pfn of the range, can be %NULL
80 * @p_end: ptr to ulong for end pfn of the range, can be %NULL
81 * @p_nid: ptr to int for nid of the range, can be %NULL
83 * Walks over configured memory ranges.
85 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
86 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
87 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
88 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
90 void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start,
91 phys_addr_t *out_end, int *out_nid);
94 * for_each_free_mem_range - iterate through free memblock areas
95 * @i: u64 used as loop variable
96 * @nid: node selector, %MAX_NUMNODES for all nodes
97 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
98 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
99 * @p_nid: ptr to int for nid of the range, can be %NULL
101 * Walks over free (memory && !reserved) areas of memblock. Available as
102 * soon as memblock is initialized.
104 #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
106 __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
107 i != (u64)ULLONG_MAX; \
108 __next_free_mem_range(&i, nid, p_start, p_end, p_nid))
110 void __next_free_mem_range_rev(u64 *idx, int nid, phys_addr_t *out_start,
111 phys_addr_t *out_end, int *out_nid);
114 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
115 * @i: u64 used as loop variable
116 * @nid: node selector, %MAX_NUMNODES for all nodes
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 * Walks over free (memory && !reserved) areas of memblock in reverse
122 * order. Available as soon as memblock is initialized.
124 #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
125 for (i = (u64)ULLONG_MAX, \
126 __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \
127 i != (u64)ULLONG_MAX; \
128 __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))
130 static inline void memblock_set_region_flags(struct memblock_region *r,
136 static inline void memblock_clear_region_flags(struct memblock_region *r,
142 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
143 int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
145 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
150 static inline int memblock_get_region_node(const struct memblock_region *r)
155 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
159 static inline int memblock_get_region_node(const struct memblock_region *r)
163 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
165 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
166 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
168 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
170 #ifdef CONFIG_MOVABLE_NODE
172 * Set the allocation direction to bottom-up or top-down.
174 static inline void memblock_set_bottom_up(bool enable)
176 memblock.bottom_up = enable;
180 * Check if the allocation direction is bottom-up or not.
181 * if this is true, that said, memblock will allocate memory
182 * in bottom-up direction.
184 static inline bool memblock_bottom_up(void)
186 return memblock.bottom_up;
189 static inline void memblock_set_bottom_up(bool enable) {}
190 static inline bool memblock_bottom_up(void) { return false; }
193 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
194 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
195 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
197 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
198 phys_addr_t max_addr);
199 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
200 phys_addr_t max_addr);
201 phys_addr_t memblock_phys_mem_size(void);
202 phys_addr_t memblock_mem_size(unsigned long limit_pfn);
203 phys_addr_t memblock_start_of_DRAM(void);
204 phys_addr_t memblock_end_of_DRAM(void);
205 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
206 int memblock_is_memory(phys_addr_t addr);
207 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
208 int memblock_is_reserved(phys_addr_t addr);
209 int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
211 extern void __memblock_dump_all(void);
213 static inline void memblock_dump_all(void)
216 __memblock_dump_all();
220 * memblock_set_current_limit - Set the current allocation limit to allow
221 * limiting allocations to what is currently
222 * accessible during boot
223 * @limit: New limit value (physical address)
225 void memblock_set_current_limit(phys_addr_t limit);
229 * pfn conversion functions
231 * While the memory MEMBLOCKs should always be page aligned, the reserved
232 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
233 * idea of what they return for such non aligned MEMBLOCKs.
237 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
238 * @reg: memblock_region structure
240 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
242 return PFN_UP(reg->base);
246 * memblock_region_memory_end_pfn - Return the end_pfn this region
247 * @reg: memblock_region structure
249 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
251 return PFN_DOWN(reg->base + reg->size);
255 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
256 * @reg: memblock_region structure
258 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
260 return PFN_DOWN(reg->base);
264 * memblock_region_reserved_end_pfn - Return the end_pfn this region
265 * @reg: memblock_region structure
267 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
269 return PFN_UP(reg->base + reg->size);
272 #define for_each_memblock(memblock_type, region) \
273 for (region = memblock.memblock_type.regions; \
274 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
278 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
279 #define __init_memblock __meminit
280 #define __initdata_memblock __meminitdata
282 #define __init_memblock
283 #define __initdata_memblock
287 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
292 #endif /* CONFIG_HAVE_MEMBLOCK */
294 #endif /* __KERNEL__ */
296 #endif /* _LINUX_MEMBLOCK_H */