| 1 | #ifndef _LINUX_MEMBLOCK_H
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| 2 | #define _LINUX_MEMBLOCK_H
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| 3 | #ifdef __KERNEL__
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| 4 |
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| 5 | #ifdef CONFIG_HAVE_MEMBLOCK
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| 6 | |
| 7 | * Logical memory blocks.
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| 8 | *
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| 9 | * Copyright (C) 2001 Peter Bergner, IBM Corp.
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| 10 | *
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| 11 | * This program is free software; you can redistribute it and/or
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| 12 | * modify it under the terms of the GNU General Public License
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| 13 | * as published by the Free Software Foundation; either version
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| 14 | * 2 of the License, or (at your option) any later version.
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| 15 |
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| 16 |
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| 17 | #include <linux/init.h>
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| 18 | #include <linux/mm.h>
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| 19 |
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| 20 | #define INIT_MEMBLOCK_REGIONS 128
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| 21 | #define INIT_PHYSMEM_REGIONS 4
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| 22 |
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| 23 |
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| 24 | #define MEMBLOCK_HOTPLUG 0x1
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| 25 |
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| 26 | struct memblock_region {
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| 27 | phys_addr_t base;
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| 28 | phys_addr_t size;
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| 29 | unsigned long flags;
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| 30 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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| 31 | int nid;
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| 32 | #endif
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| 33 | };
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| 34 |
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| 35 | struct memblock_type {
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| 36 | unsigned long cnt;
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| 37 | unsigned long max;
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| 38 | phys_addr_t total_size;
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| 39 | struct memblock_region *regions;
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| 40 | };
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| 41 |
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| 42 | struct memblock {
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| 43 | bool bottom_up;
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| 44 | phys_addr_t current_limit;
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| 45 | struct memblock_type memory;
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| 46 | struct memblock_type reserved;
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| 47 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
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| 48 | struct memblock_type physmem;
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| 49 | #endif
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| 50 | };
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| 51 |
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| 52 | extern struct memblock memblock;
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| 53 | extern int memblock_debug;
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| 54 | #ifdef CONFIG_MOVABLE_NODE
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| 55 |
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| 56 | extern bool movable_node_enabled;
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| 57 | #endif
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| 58 |
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| 59 | #define memblock_dbg(fmt, ...) \
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| 60 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
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| 61 |
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| 62 | phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
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| 63 | phys_addr_t start, phys_addr_t end,
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| 64 | int nid);
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| 65 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
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| 66 | phys_addr_t size, phys_addr_t align);
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| 67 | phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
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| 68 | phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
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| 69 | void memblock_allow_resize(void);
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| 70 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
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| 71 | int memblock_add(phys_addr_t base, phys_addr_t size);
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| 72 | int memblock_remove(phys_addr_t base, phys_addr_t size);
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| 73 | int memblock_free(phys_addr_t base, phys_addr_t size);
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| 74 | int memblock_reserve(phys_addr_t base, phys_addr_t size);
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| 75 | void memblock_trim_memory(phys_addr_t align);
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| 76 | int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
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| 77 | int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
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| 78 |
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| 79 |
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| 80 | int memblock_add_range(struct memblock_type *type,
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| 81 | phys_addr_t base, phys_addr_t size,
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| 82 | int nid, unsigned long flags);
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| 83 |
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| 84 | int memblock_remove_range(struct memblock_type *type,
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| 85 | phys_addr_t base,
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| 86 | phys_addr_t size);
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| 87 |
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| 88 | void __next_mem_range(u64 *idx, int nid, struct memblock_type *type_a,
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| 89 | struct memblock_type *type_b, phys_addr_t *out_start,
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| 90 | phys_addr_t *out_end, int *out_nid);
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| 91 |
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| 92 | void __next_mem_range_rev(u64 *idx, int nid, struct memblock_type *type_a,
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| 93 | struct memblock_type *type_b, phys_addr_t *out_start,
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| 94 | phys_addr_t *out_end, int *out_nid);
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| 95 |
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| 96 | |
| 97 | * for_each_mem_range - iterate through memblock areas from type_a and not
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| 98 | * included in type_b. Or just type_a if type_b is NULL.
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| 99 | * @i: u64 used as loop variable
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| 100 | * @type_a: ptr to memblock_type to iterate
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| 101 | * @type_b: ptr to memblock_type which excludes from the iteration
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| 102 | * @nid: node selector, %NUMA_NO_NODE for all nodes
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| 103 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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| 104 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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| 105 | * @p_nid: ptr to int for nid of the range, can be %NULL
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| 106 |
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| 107 | #define for_each_mem_range(i, type_a, type_b, nid, \
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| 108 | p_start, p_end, p_nid) \
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| 109 | for (i = 0, __next_mem_range(&i, nid, type_a, type_b, \
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| 110 | p_start, p_end, p_nid); \
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| 111 | i != (u64)ULLONG_MAX; \
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| 112 | __next_mem_range(&i, nid, type_a, type_b, \
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| 113 | p_start, p_end, p_nid))
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| 114 |
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| 115 | |
| 116 | * for_each_mem_range_rev - reverse iterate through memblock areas from
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| 117 | * type_a and not included in type_b. Or just type_a if type_b is NULL.
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| 118 | * @i: u64 used as loop variable
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| 119 | * @type_a: ptr to memblock_type to iterate
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| 120 | * @type_b: ptr to memblock_type which excludes from the iteration
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| 121 | * @nid: node selector, %NUMA_NO_NODE for all nodes
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| 122 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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| 123 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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| 124 | * @p_nid: ptr to int for nid of the range, can be %NULL
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| 125 |
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| 126 | #define for_each_mem_range_rev(i, type_a, type_b, nid, \
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| 127 | p_start, p_end, p_nid) \
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| 128 | for (i = (u64)ULLONG_MAX, \
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| 129 | __next_mem_range_rev(&i, nid, type_a, type_b, \
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| 130 | p_start, p_end, p_nid); \
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| 131 | i != (u64)ULLONG_MAX; \
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| 132 | __next_mem_range_rev(&i, nid, type_a, type_b, \
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| 133 | p_start, p_end, p_nid))
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| 134 |
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| 135 | #ifdef CONFIG_MOVABLE_NODE
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| 136 | static inline bool memblock_is_hotpluggable(struct memblock_region *m)
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| 137 | {
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| 138 | return m->flags & MEMBLOCK_HOTPLUG;
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| 139 | }
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| 140 |
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| 141 | static inline bool movable_node_is_enabled(void)
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| 142 | {
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| 143 | return movable_node_enabled;
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| 144 | }
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| 145 | #else
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| 146 | static inline bool memblock_is_hotpluggable(struct memblock_region *m)
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| 147 | {
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| 148 | return false;
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| 149 | }
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| 150 | static inline bool movable_node_is_enabled(void)
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| 151 | {
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| 152 | return false;
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| 153 | }
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| 154 | #endif
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| 155 |
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| 156 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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| 157 | int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
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| 158 | unsigned long *end_pfn);
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| 159 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
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| 160 | unsigned long *out_end_pfn, int *out_nid);
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| 161 |
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| 162 | |
| 163 | * for_each_mem_pfn_range - early memory pfn range iterator
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| 164 | * @i: an integer used as loop variable
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| 165 | * @nid: node selector, %MAX_NUMNODES for all nodes
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| 166 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL
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| 167 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL
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| 168 | * @p_nid: ptr to int for nid of the range, can be %NULL
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| 169 | *
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| 170 | * Walks over configured memory ranges.
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| 171 |
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| 172 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
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| 173 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
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| 174 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
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| 175 | #endif
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| 176 |
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| 177 | |
| 178 | * for_each_free_mem_range - iterate through free memblock areas
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| 179 | * @i: u64 used as loop variable
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| 180 | * @nid: node selector, %NUMA_NO_NODE for all nodes
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| 181 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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| 182 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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| 183 | * @p_nid: ptr to int for nid of the range, can be %NULL
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| 184 | *
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| 185 | * Walks over free (memory && !reserved) areas of memblock. Available as
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| 186 | * soon as memblock is initialized.
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| 187 |
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| 188 | #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
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| 189 | for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
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| 190 | nid, p_start, p_end, p_nid)
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| 191 |
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| 192 | |
| 193 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
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| 194 | * @i: u64 used as loop variable
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| 195 | * @nid: node selector, %NUMA_NO_NODE for all nodes
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| 196 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
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| 197 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
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| 198 | * @p_nid: ptr to int for nid of the range, can be %NULL
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| 199 | *
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| 200 | * Walks over free (memory && !reserved) areas of memblock in reverse
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| 201 | * order. Available as soon as memblock is initialized.
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| 202 |
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| 203 | #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
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| 204 | for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
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| 205 | nid, p_start, p_end, p_nid)
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| 206 |
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| 207 | static inline void memblock_set_region_flags(struct memblock_region *r,
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| 208 | unsigned long flags)
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| 209 | {
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| 210 | r->flags |= flags;
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| 211 | }
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| 212 |
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| 213 | static inline void memblock_clear_region_flags(struct memblock_region *r,
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| 214 | unsigned long flags)
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| 215 | {
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| 216 | r->flags &= ~flags;
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| 217 | }
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| 218 |
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| 219 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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| 220 | int memblock_set_node(phys_addr_t base, phys_addr_t size,
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| 221 | struct memblock_type *type, int nid);
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| 222 |
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| 223 | static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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| 224 | {
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| 225 | r->nid = nid;
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| 226 | }
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| 227 |
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| 228 | static inline int memblock_get_region_node(const struct memblock_region *r)
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| 229 | {
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| 230 | return r->nid;
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| 231 | }
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| 232 | #else
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| 233 | static inline void memblock_set_region_node(struct memblock_region *r, int nid)
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| 234 | {
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| 235 | }
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| 236 |
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| 237 | static inline int memblock_get_region_node(const struct memblock_region *r)
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| 238 | {
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| 239 | return 0;
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| 240 | }
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| 241 | #endif
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| 242 |
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| 243 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
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| 244 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
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| 245 |
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| 246 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
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| 247 |
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| 248 | #ifdef CONFIG_MOVABLE_NODE
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| 249 | |
| 250 | * Set the allocation direction to bottom-up or top-down.
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| 251 |
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| 252 | static inline void memblock_set_bottom_up(bool enable)
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| 253 | {
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| 254 | memblock.bottom_up = enable;
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| 255 | }
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| 256 |
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| 257 | |
| 258 | * Check if the allocation direction is bottom-up or not.
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| 259 | * if this is true, that said, memblock will allocate memory
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| 260 | * in bottom-up direction.
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| 261 |
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| 262 | static inline bool memblock_bottom_up(void)
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| 263 | {
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| 264 | return memblock.bottom_up;
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| 265 | }
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| 266 | #else
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| 267 | static inline void memblock_set_bottom_up(bool enable) {}
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| 268 | static inline bool memblock_bottom_up(void) { return false; }
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| 269 | #endif
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| 270 |
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| 271 |
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| 272 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
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| 273 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0
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| 274 |
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| 275 | phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
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| 276 | phys_addr_t start, phys_addr_t end);
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| 277 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
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| 278 | phys_addr_t max_addr);
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| 279 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
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| 280 | phys_addr_t max_addr);
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| 281 | phys_addr_t memblock_phys_mem_size(void);
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| 282 | phys_addr_t memblock_mem_size(unsigned long limit_pfn);
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| 283 | phys_addr_t memblock_start_of_DRAM(void);
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| 284 | phys_addr_t memblock_end_of_DRAM(void);
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| 285 | void memblock_enforce_memory_limit(phys_addr_t memory_limit);
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| 286 | int memblock_is_memory(phys_addr_t addr);
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| 287 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
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| 288 | int memblock_is_reserved(phys_addr_t addr);
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| 289 | int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
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| 290 |
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| 291 | extern void __memblock_dump_all(void);
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| 292 |
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| 293 | static inline void memblock_dump_all(void)
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| 294 | {
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| 295 | if (memblock_debug)
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| 296 | __memblock_dump_all();
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| 297 | }
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| 298 |
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| 299 | |
| 300 | * memblock_set_current_limit - Set the current allocation limit to allow
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| 301 | * limiting allocations to what is currently
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| 302 | * accessible during boot
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| 303 | * @limit: New limit value (physical address)
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| 304 |
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| 305 | void memblock_set_current_limit(phys_addr_t limit);
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| 306 |
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| 307 |
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| 308 | phys_addr_t memblock_get_current_limit(void);
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| 309 |
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| 310 | |
| 311 | * pfn conversion functions
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| 312 | *
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| 313 | * While the memory MEMBLOCKs should always be page aligned, the reserved
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| 314 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear
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| 315 | * idea of what they return for such non aligned MEMBLOCKs.
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| 316 |
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| 317 |
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| 318 | |
| 319 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
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| 320 | * @reg: memblock_region structure
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| 321 |
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| 322 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
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| 323 | {
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| 324 | return PFN_UP(reg->base);
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| 325 | }
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| 326 |
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| 327 | |
| 328 | * memblock_region_memory_end_pfn - Return the end_pfn this region
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| 329 | * @reg: memblock_region structure
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| 330 |
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| 331 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
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| 332 | {
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| 333 | return PFN_DOWN(reg->base + reg->size);
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| 334 | }
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| 335 |
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| 336 | |
| 337 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
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| 338 | * @reg: memblock_region structure
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| 339 |
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| 340 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
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| 341 | {
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| 342 | return PFN_DOWN(reg->base);
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| 343 | }
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| 344 |
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| 345 | |
| 346 | * memblock_region_reserved_end_pfn - Return the end_pfn this region
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| 347 | * @reg: memblock_region structure
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| 348 |
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| 349 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
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| 350 | {
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| 351 | return PFN_UP(reg->base + reg->size);
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| 352 | }
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| 353 |
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| 354 | #define for_each_memblock(memblock_type, region) \
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| 355 | for (region = memblock.memblock_type.regions; \
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| 356 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
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| 357 | region++)
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| 358 |
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| 359 |
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| 360 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
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| 361 | #define __init_memblock __meminit
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| 362 | #define __initdata_memblock __meminitdata
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| 363 | #else
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| 364 | #define __init_memblock
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| 365 | #define __initdata_memblock
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| 366 | #endif
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| 367 |
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| 368 | #else
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| 369 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
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| 370 | {
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| 371 | return 0;
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| 372 | }
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| 373 |
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| 374 | #endif
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| 375 |
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| 376 | #endif
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| 377 |
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| 378 | #endif
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