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,
144 struct memblock_type *type, int nid);
146 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
151 static inline int memblock_get_region_node(const struct memblock_region *r)
156 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
160 static inline int memblock_get_region_node(const struct memblock_region *r)
164 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
166 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
167 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
169 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
171 #ifdef CONFIG_MOVABLE_NODE
173 * Set the allocation direction to bottom-up or top-down.
175 static inline void memblock_set_bottom_up(bool enable)
177 memblock.bottom_up = enable;
181 * Check if the allocation direction is bottom-up or not.
182 * if this is true, that said, memblock will allocate memory
183 * in bottom-up direction.
185 static inline bool memblock_bottom_up(void)
187 return memblock.bottom_up;
190 static inline void memblock_set_bottom_up(bool enable) {}
191 static inline bool memblock_bottom_up(void) { return false; }
194 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
195 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
196 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
198 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
199 phys_addr_t max_addr);
200 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
201 phys_addr_t max_addr);
202 phys_addr_t memblock_phys_mem_size(void);
203 phys_addr_t memblock_mem_size(unsigned long limit_pfn);
204 phys_addr_t memblock_start_of_DRAM(void);
205 phys_addr_t memblock_end_of_DRAM(void);
206 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
207 int memblock_is_memory(phys_addr_t addr);
208 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
209 int memblock_is_reserved(phys_addr_t addr);
210 int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
212 extern void __memblock_dump_all(void);
214 static inline void memblock_dump_all(void)
217 __memblock_dump_all();
221 * memblock_set_current_limit - Set the current allocation limit to allow
222 * limiting allocations to what is currently
223 * accessible during boot
224 * @limit: New limit value (physical address)
226 void memblock_set_current_limit(phys_addr_t limit);
230 * pfn conversion functions
232 * While the memory MEMBLOCKs should always be page aligned, the reserved
233 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
234 * idea of what they return for such non aligned MEMBLOCKs.
238 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
239 * @reg: memblock_region structure
241 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
243 return PFN_UP(reg->base);
247 * memblock_region_memory_end_pfn - Return the end_pfn this region
248 * @reg: memblock_region structure
250 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
252 return PFN_DOWN(reg->base + reg->size);
256 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
257 * @reg: memblock_region structure
259 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
261 return PFN_DOWN(reg->base);
265 * memblock_region_reserved_end_pfn - Return the end_pfn this region
266 * @reg: memblock_region structure
268 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
270 return PFN_UP(reg->base + reg->size);
273 #define for_each_memblock(memblock_type, region) \
274 for (region = memblock.memblock_type.regions; \
275 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
279 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
280 #define __init_memblock __meminit
281 #define __initdata_memblock __meminitdata
283 #define __init_memblock
284 #define __initdata_memblock
288 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
293 #endif /* CONFIG_HAVE_MEMBLOCK */
295 #endif /* __KERNEL__ */
297 #endif /* _LINUX_MEMBLOCK_H */