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 struct memblock_region {
25 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
30 struct memblock_type {
31 unsigned long cnt; /* number of regions */
32 unsigned long max; /* size of the allocated array */
33 struct memblock_region *regions;
37 phys_addr_t current_limit;
38 phys_addr_t memory_size; /* Updated by memblock_analyze() */
39 struct memblock_type memory;
40 struct memblock_type reserved;
43 extern struct memblock memblock;
44 extern int memblock_debug;
45 extern int memblock_can_resize;
47 #define memblock_dbg(fmt, ...) \
48 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
50 phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
51 phys_addr_t size, phys_addr_t align);
52 int memblock_free_reserved_regions(void);
53 int memblock_reserve_reserved_regions(void);
55 void memblock_init(void);
56 void memblock_analyze(void);
57 int memblock_add(phys_addr_t base, phys_addr_t size);
58 int memblock_remove(phys_addr_t base, phys_addr_t size);
59 int memblock_free(phys_addr_t base, phys_addr_t size);
60 int memblock_reserve(phys_addr_t base, phys_addr_t size);
62 void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start,
63 phys_addr_t *out_end, int *out_nid);
66 * for_each_free_mem_range - iterate through free memblock areas
67 * @i: u64 used as loop variable
68 * @nid: node selector, %MAX_NUMNODES for all nodes
69 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
70 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
71 * @p_nid: ptr to int for nid of the range, can be %NULL
73 * Walks over free (memory && !reserved) areas of memblock. Available as
74 * soon as memblock is initialized.
76 #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
78 __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
79 i != (u64)ULLONG_MAX; \
80 __next_free_mem_range(&i, nid, p_start, p_end, p_nid))
82 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
83 int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
85 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
90 static inline int memblock_get_region_node(const struct memblock_region *r)
95 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
99 static inline int memblock_get_region_node(const struct memblock_region *r)
103 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
105 /* The numa aware allocator is only available if
106 * CONFIG_ARCH_POPULATES_NODE_MAP is set
108 phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end,
109 phys_addr_t size, phys_addr_t align, int nid);
110 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
111 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
113 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
115 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
116 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
117 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
119 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
120 phys_addr_t max_addr);
121 phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
122 phys_addr_t max_addr);
123 phys_addr_t memblock_phys_mem_size(void);
124 phys_addr_t memblock_start_of_DRAM(void);
125 phys_addr_t memblock_end_of_DRAM(void);
126 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
127 int memblock_is_memory(phys_addr_t addr);
128 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
129 int memblock_is_reserved(phys_addr_t addr);
130 int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
132 void memblock_dump_all(void);
135 * memblock_set_current_limit - Set the current allocation limit to allow
136 * limiting allocations to what is currently
137 * accessible during boot
138 * @limit: New limit value (physical address)
140 void memblock_set_current_limit(phys_addr_t limit);
144 * pfn conversion functions
146 * While the memory MEMBLOCKs should always be page aligned, the reserved
147 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
148 * idea of what they return for such non aligned MEMBLOCKs.
152 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
153 * @reg: memblock_region structure
155 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
157 return PFN_UP(reg->base);
161 * memblock_region_memory_end_pfn - Return the end_pfn this region
162 * @reg: memblock_region structure
164 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
166 return PFN_DOWN(reg->base + reg->size);
170 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
171 * @reg: memblock_region structure
173 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
175 return PFN_DOWN(reg->base);
179 * memblock_region_reserved_end_pfn - Return the end_pfn this region
180 * @reg: memblock_region structure
182 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
184 return PFN_UP(reg->base + reg->size);
187 #define for_each_memblock(memblock_type, region) \
188 for (region = memblock.memblock_type.regions; \
189 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
193 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
194 #define __init_memblock __meminit
195 #define __initdata_memblock __meminitdata
197 #define __init_memblock
198 #define __initdata_memblock
202 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
207 #endif /* CONFIG_HAVE_MEMBLOCK */
209 #endif /* __KERNEL__ */
211 #endif /* _LINUX_MEMBLOCK_H */