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 phys_addr_t total_size; /* size of all regions */
34 struct memblock_region *regions;
38 phys_addr_t current_limit;
39 struct memblock_type memory;
40 struct memblock_type reserved;
43 extern struct memblock memblock;
44 extern int memblock_debug;
46 #define memblock_dbg(fmt, ...) \
47 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
49 phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
50 phys_addr_t size, phys_addr_t align);
51 int memblock_free_reserved_regions(void);
52 int memblock_reserve_reserved_regions(void);
54 void memblock_allow_resize(void);
55 int memblock_add(phys_addr_t base, phys_addr_t size);
56 int memblock_remove(phys_addr_t base, phys_addr_t size);
57 int memblock_free(phys_addr_t base, phys_addr_t size);
58 int memblock_reserve(phys_addr_t base, phys_addr_t size);
60 void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start,
61 phys_addr_t *out_end, int *out_nid);
64 * for_each_free_mem_range - iterate through free memblock areas
65 * @i: u64 used as loop variable
66 * @nid: node selector, %MAX_NUMNODES for all nodes
67 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
68 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
69 * @p_nid: ptr to int for nid of the range, can be %NULL
71 * Walks over free (memory && !reserved) areas of memblock. Available as
72 * soon as memblock is initialized.
74 #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
76 __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
77 i != (u64)ULLONG_MAX; \
78 __next_free_mem_range(&i, nid, p_start, p_end, p_nid))
80 #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
81 int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
83 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
88 static inline int memblock_get_region_node(const struct memblock_region *r)
93 static inline void memblock_set_region_node(struct memblock_region *r, int nid)
97 static inline int memblock_get_region_node(const struct memblock_region *r)
101 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
103 /* The numa aware allocator is only available if
104 * CONFIG_ARCH_POPULATES_NODE_MAP is set
106 phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end,
107 phys_addr_t size, phys_addr_t align, int nid);
108 phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
109 phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
111 phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
113 /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
114 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
115 #define MEMBLOCK_ALLOC_ACCESSIBLE 0
117 phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
118 phys_addr_t max_addr);
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_phys_mem_size(void);
122 phys_addr_t memblock_start_of_DRAM(void);
123 phys_addr_t memblock_end_of_DRAM(void);
124 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
125 int memblock_is_memory(phys_addr_t addr);
126 int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
127 int memblock_is_reserved(phys_addr_t addr);
128 int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
130 extern void __memblock_dump_all(void);
132 static inline void memblock_dump_all(void)
135 __memblock_dump_all();
139 * memblock_set_current_limit - Set the current allocation limit to allow
140 * limiting allocations to what is currently
141 * accessible during boot
142 * @limit: New limit value (physical address)
144 void memblock_set_current_limit(phys_addr_t limit);
148 * pfn conversion functions
150 * While the memory MEMBLOCKs should always be page aligned, the reserved
151 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
152 * idea of what they return for such non aligned MEMBLOCKs.
156 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
157 * @reg: memblock_region structure
159 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
161 return PFN_UP(reg->base);
165 * memblock_region_memory_end_pfn - Return the end_pfn this region
166 * @reg: memblock_region structure
168 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
170 return PFN_DOWN(reg->base + reg->size);
174 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
175 * @reg: memblock_region structure
177 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
179 return PFN_DOWN(reg->base);
183 * memblock_region_reserved_end_pfn - Return the end_pfn this region
184 * @reg: memblock_region structure
186 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
188 return PFN_UP(reg->base + reg->size);
191 #define for_each_memblock(memblock_type, region) \
192 for (region = memblock.memblock_type.regions; \
193 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
197 #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
198 #define __init_memblock __meminit
199 #define __initdata_memblock __meminitdata
201 #define __init_memblock
202 #define __initdata_memblock
206 static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
211 #endif /* CONFIG_HAVE_MEMBLOCK */
213 #endif /* __KERNEL__ */
215 #endif /* _LINUX_MEMBLOCK_H */