| 1 | #ifndef _LINUX_MEMBLOCK_H |
| 2 | #define _LINUX_MEMBLOCK_H |
| 3 | #ifdef __KERNEL__ |
| 4 | |
| 5 | #ifdef CONFIG_HAVE_MEMBLOCK |
| 6 | /* |
| 7 | * Logical memory blocks. |
| 8 | * |
| 9 | * Copyright (C) 2001 Peter Bergner, IBM Corp. |
| 10 | * |
| 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. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/mm.h> |
| 19 | |
| 20 | #define INIT_MEMBLOCK_REGIONS 128 |
| 21 | |
| 22 | struct memblock_region { |
| 23 | phys_addr_t base; |
| 24 | phys_addr_t size; |
| 25 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 26 | int nid; |
| 27 | #endif |
| 28 | }; |
| 29 | |
| 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; |
| 35 | }; |
| 36 | |
| 37 | struct memblock { |
| 38 | phys_addr_t current_limit; |
| 39 | struct memblock_type memory; |
| 40 | struct memblock_type reserved; |
| 41 | }; |
| 42 | |
| 43 | extern struct memblock memblock; |
| 44 | extern int memblock_debug; |
| 45 | |
| 46 | #define memblock_dbg(fmt, ...) \ |
| 47 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
| 48 | |
| 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); |
| 53 | |
| 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); |
| 59 | |
| 60 | void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start, |
| 61 | phys_addr_t *out_end, int *out_nid); |
| 62 | |
| 63 | /** |
| 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 |
| 70 | * |
| 71 | * Walks over free (memory && !reserved) areas of memblock. Available as |
| 72 | * soon as memblock is initialized. |
| 73 | */ |
| 74 | #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \ |
| 75 | for (i = 0, \ |
| 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)) |
| 79 | |
| 80 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 81 | int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid); |
| 82 | |
| 83 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) |
| 84 | { |
| 85 | r->nid = nid; |
| 86 | } |
| 87 | |
| 88 | static inline int memblock_get_region_node(const struct memblock_region *r) |
| 89 | { |
| 90 | return r->nid; |
| 91 | } |
| 92 | #else |
| 93 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) |
| 94 | { |
| 95 | } |
| 96 | |
| 97 | static inline int memblock_get_region_node(const struct memblock_region *r) |
| 98 | { |
| 99 | return 0; |
| 100 | } |
| 101 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ |
| 102 | |
| 103 | /* The numa aware allocator is only available if |
| 104 | * CONFIG_ARCH_POPULATES_NODE_MAP is set |
| 105 | */ |
| 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); |
| 110 | |
| 111 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
| 112 | |
| 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 |
| 116 | |
| 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); |
| 129 | |
| 130 | extern void __memblock_dump_all(void); |
| 131 | |
| 132 | static inline void memblock_dump_all(void) |
| 133 | { |
| 134 | if (memblock_debug) |
| 135 | __memblock_dump_all(); |
| 136 | } |
| 137 | |
| 138 | /** |
| 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) |
| 143 | */ |
| 144 | void memblock_set_current_limit(phys_addr_t limit); |
| 145 | |
| 146 | |
| 147 | /* |
| 148 | * pfn conversion functions |
| 149 | * |
| 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. |
| 153 | */ |
| 154 | |
| 155 | /** |
| 156 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
| 157 | * @reg: memblock_region structure |
| 158 | */ |
| 159 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
| 160 | { |
| 161 | return PFN_UP(reg->base); |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
| 166 | * @reg: memblock_region structure |
| 167 | */ |
| 168 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
| 169 | { |
| 170 | return PFN_DOWN(reg->base + reg->size); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
| 175 | * @reg: memblock_region structure |
| 176 | */ |
| 177 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
| 178 | { |
| 179 | return PFN_DOWN(reg->base); |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
| 184 | * @reg: memblock_region structure |
| 185 | */ |
| 186 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
| 187 | { |
| 188 | return PFN_UP(reg->base + reg->size); |
| 189 | } |
| 190 | |
| 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); \ |
| 194 | region++) |
| 195 | |
| 196 | |
| 197 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
| 198 | #define __init_memblock __meminit |
| 199 | #define __initdata_memblock __meminitdata |
| 200 | #else |
| 201 | #define __init_memblock |
| 202 | #define __initdata_memblock |
| 203 | #endif |
| 204 | |
| 205 | #else |
| 206 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) |
| 207 | { |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
| 212 | |
| 213 | #endif /* __KERNEL__ */ |
| 214 | |
| 215 | #endif /* _LINUX_MEMBLOCK_H */ |