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Release 4.16 include/linux/memblock.h

Directory: include/linux
#ifndef _LINUX_MEMBLOCK_H

#define _LINUX_MEMBLOCK_H
#ifdef __KERNEL__

#ifdef CONFIG_HAVE_MEMBLOCK
/*
 * Logical memory blocks.
 *
 * Copyright (C) 2001 Peter Bergner, IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/init.h>
#include <linux/mm.h>


#define INIT_MEMBLOCK_REGIONS	128

#define INIT_PHYSMEM_REGIONS	4

/* Definition of memblock flags. */

enum {
	
MEMBLOCK_NONE		= 0x0,	/* No special request */
	
MEMBLOCK_HOTPLUG	= 0x1,	/* hotpluggable region */
	
MEMBLOCK_MIRROR		= 0x2,	/* mirrored region */
	
MEMBLOCK_NOMAP		= 0x4,	/* don't add to kernel direct mapping */
};


struct memblock_region {
	
phys_addr_t base;
	
phys_addr_t size;
	
unsigned long flags;
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	
int nid;
#endif
};


struct memblock_type {
	
unsigned long cnt;	/* number of regions */
	
unsigned long max;	/* size of the allocated array */
	
phys_addr_t total_size;	/* size of all regions */
	
struct memblock_region *regions;
	
char *name;
};


struct memblock {
	
bool bottom_up;  /* is bottom up direction? */
	
phys_addr_t current_limit;
	
struct memblock_type memory;
	
struct memblock_type reserved;
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	
struct memblock_type physmem;
#endif
};

extern struct memblock memblock;
extern int memblock_debug;

#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK

#define __init_memblock __meminit

#define __initdata_memblock __meminitdata
void memblock_discard(void);
#else

#define __init_memblock

#define __initdata_memblock
#endif


#define memblock_dbg(fmt, ...) \
	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)

phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
					phys_addr_t start, phys_addr_t end,
					int nid, ulong flags);
phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
				   phys_addr_t size, phys_addr_t align);
void memblock_allow_resize(void);
int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
int memblock_add(phys_addr_t base, phys_addr_t size);
int memblock_remove(phys_addr_t base, phys_addr_t size);
int memblock_free(phys_addr_t base, phys_addr_t size);
int memblock_reserve(phys_addr_t base, phys_addr_t size);
void memblock_trim_memory(phys_addr_t align);
bool memblock_overlaps_region(struct memblock_type *type,
			      phys_addr_t base, phys_addr_t size);
int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
ulong choose_memblock_flags(void);

/* Low level functions */
int memblock_add_range(struct memblock_type *type,
		       phys_addr_t base, phys_addr_t size,
		       int nid, unsigned long flags);

void __next_mem_range(u64 *idx, int nid, ulong flags,
		      struct memblock_type *type_a,
		      struct memblock_type *type_b, phys_addr_t *out_start,
		      phys_addr_t *out_end, int *out_nid);

void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
			  struct memblock_type *type_a,
			  struct memblock_type *type_b, phys_addr_t *out_start,
			  phys_addr_t *out_end, int *out_nid);

void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
				phys_addr_t *out_end);

void __memblock_free_early(phys_addr_t base, phys_addr_t size);
void __memblock_free_late(phys_addr_t base, phys_addr_t size);

/**
 * for_each_mem_range - iterate through memblock areas from type_a and not
 * included in type_b. Or just type_a if type_b is NULL.
 * @i: u64 used as loop variable
 * @type_a: ptr to memblock_type to iterate
 * @type_b: ptr to memblock_type which excludes from the iteration
 * @nid: node selector, %NUMA_NO_NODE for all nodes
 * @flags: pick from blocks based on memory attributes
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 * @p_nid: ptr to int for nid of the range, can be %NULL
 */
#define for_each_mem_range(i, type_a, type_b, nid, flags,               \
			   
p_start, p_end, p_nid)			\
	for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b,    \
                                     p_start, p_end, p_nid);            \
             i != (u64)ULLONG_MAX;                                      \
             __next_mem_range(&i, nid, flags, type_a, type_b,           \
                              p_start, p_end, p_nid))

/**
 * for_each_mem_range_rev - reverse iterate through memblock areas from
 * type_a and not included in type_b. Or just type_a if type_b is NULL.
 * @i: u64 used as loop variable
 * @type_a: ptr to memblock_type to iterate
 * @type_b: ptr to memblock_type which excludes from the iteration
 * @nid: node selector, %NUMA_NO_NODE for all nodes
 * @flags: pick from blocks based on memory attributes
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 * @p_nid: ptr to int for nid of the range, can be %NULL
 */
#define for_each_mem_range_rev(i, type_a, type_b, nid, flags,               \
			       
p_start, p_end, p_nid)			\
	for (i = (u64)ULLONG_MAX,                                       \
                     __next_mem_range_rev(&i, nid, flags, type_a, type_b,\
                                          p_start, p_end, p_nid);       \
             i != (u64)ULLONG_MAX;                                      \
             __next_mem_range_rev(&i, nid, flags, type_a, type_b,       \
                                  p_start, p_end, p_nid))

/**
 * for_each_reserved_mem_region - iterate over all reserved memblock areas
 * @i: u64 used as loop variable
 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
 *
 * Walks over reserved areas of memblock. Available as soon as memblock
 * is initialized.
 */

#define for_each_reserved_mem_region(i, p_start, p_end)			\
	for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end);   \
             i != (u64)ULLONG_MAX;                                      \
             __next_reserved_mem_region(&i, p_start, p_end))


static inline bool memblock_is_hotpluggable(struct memblock_region *m) { return m->flags & MEMBLOCK_HOTPLUG; }

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static inline bool memblock_is_mirror(struct memblock_region *m) { return m->flags & MEMBLOCK_MIRROR; }

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static inline bool memblock_is_nomap(struct memblock_region *m) { return m->flags & MEMBLOCK_NOMAP; }

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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, unsigned long *end_pfn); void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, unsigned long *out_end_pfn, int *out_nid); /** * for_each_mem_pfn_range - early memory pfn range iterator * @i: an integer used as loop variable * @nid: node selector, %MAX_NUMNODES for all nodes * @p_start: ptr to ulong for start pfn of the range, can be %NULL * @p_end: ptr to ulong for end pfn of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL * * Walks over configured memory ranges. */ #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ /** * for_each_free_mem_range - iterate through free memblock areas * @i: u64 used as loop variable * @nid: node selector, %NUMA_NO_NODE for all nodes * @flags: pick from blocks based on memory attributes * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL * * Walks over free (memory && !reserved) areas of memblock. Available as * soon as memblock is initialized. */ #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ nid, flags, p_start, p_end, p_nid) /** * for_each_free_mem_range_reverse - rev-iterate through free memblock areas * @i: u64 used as loop variable * @nid: node selector, %NUMA_NO_NODE for all nodes * @flags: pick from blocks based on memory attributes * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL * * Walks over free (memory && !reserved) areas of memblock in reverse * order. Available as soon as memblock is initialized. */ #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ p_nid) \ for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ nid, flags, p_start, p_end, p_nid) /** * for_each_resv_unavail_range - iterate through reserved and unavailable memory * @i: u64 used as loop variable * @flags: pick from blocks based on memory attributes * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * * Walks over unavailable but reserved (reserved && !memory) areas of memblock. * Available as soon as memblock is initialized. * Note: because this memory does not belong to any physical node, flags and * nid arguments do not make sense and thus not exported as arguments. */ #define for_each_resv_unavail_range(i, p_start, p_end) \ for_each_mem_range(i, &memblock.reserved, &memblock.memory, \ NUMA_NO_NODE, MEMBLOCK_NONE, p_start, p_end, NULL)
static inline void memblock_set_region_flags(struct memblock_region *r, unsigned long flags) { r->flags |= flags; }

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static inline void memblock_clear_region_flags(struct memblock_region *r, unsigned long flags) { r->flags &= ~flags; }

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#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP int memblock_set_node(phys_addr_t base, phys_addr_t size, struct memblock_type *type, int nid);
static inline void memblock_set_region_node(struct memblock_region *r, int nid) { r->nid = nid; }

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static inline int memblock_get_region_node(const struct memblock_region *r) { return r->nid; }

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#else
static inline void memblock_set_region_node(struct memblock_region *r, int nid) { }

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static inline int memblock_get_region_node(const struct memblock_region *r) { return 0; }

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#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); /* * Set the allocation direction to bottom-up or top-down. */
static inline void __init memblock_set_bottom_up(bool enable) { memblock.bottom_up = enable; }

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/* * Check if the allocation direction is bottom-up or not. * if this is true, that said, memblock will allocate memory * in bottom-up direction. */
static inline bool memblock_bottom_up(void) { return memblock.bottom_up; }

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/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) #define MEMBLOCK_ALLOC_ACCESSIBLE 0 phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, ulong flags); phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr); phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr); phys_addr_t memblock_phys_mem_size(void); phys_addr_t memblock_reserved_size(void); phys_addr_t memblock_mem_size(unsigned long limit_pfn); phys_addr_t memblock_start_of_DRAM(void); phys_addr_t memblock_end_of_DRAM(void); void memblock_enforce_memory_limit(phys_addr_t memory_limit); void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size); void memblock_mem_limit_remove_map(phys_addr_t limit); bool memblock_is_memory(phys_addr_t addr); bool memblock_is_map_memory(phys_addr_t addr); bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size); bool memblock_is_reserved(phys_addr_t addr); bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); extern void __memblock_dump_all(void);
static inline void memblock_dump_all(void) { if (memblock_debug) __memblock_dump_all(); }

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/** * memblock_set_current_limit - Set the current allocation limit to allow * limiting allocations to what is currently * accessible during boot * @limit: New limit value (physical address) */ void memblock_set_current_limit(phys_addr_t limit); phys_addr_t memblock_get_current_limit(void); /* * pfn conversion functions * * While the memory MEMBLOCKs should always be page aligned, the reserved * MEMBLOCKs may not be. This accessor attempt to provide a very clear * idea of what they return for such non aligned MEMBLOCKs. */ /** * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region * @reg: memblock_region structure */
static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) { return PFN_UP(reg->base); }

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/** * memblock_region_memory_end_pfn - Return the end_pfn this region * @reg: memblock_region structure */
static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) { return PFN_DOWN(reg->base + reg->size); }

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/** * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region * @reg: memblock_region structure */
static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) { return PFN_DOWN(reg->base); }

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/** * memblock_region_reserved_end_pfn - Return the end_pfn this region * @reg: memblock_region structure */
static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) { return PFN_UP(reg->base + reg->size); }

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#define for_each_memblock(memblock_type, region) \ for (region = memblock.memblock_type.regions; \ region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ region++) #define for_each_memblock_type(i, memblock_type, rgn) \ for (i = 0, rgn = &memblock_type->regions[0]; \ i < memblock_type->cnt; \ i++, rgn = &memblock_type->regions[i]) #ifdef CONFIG_MEMTEST extern void early_memtest(phys_addr_t start, phys_addr_t end); #else
static inline void early_memtest(phys_addr_t start, phys_addr_t end) { }

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#endif extern unsigned long memblock_reserved_memory_within(phys_addr_t start_addr, phys_addr_t end_addr); #else
static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) { return 0; }

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static inline unsigned long memblock_reserved_memory_within(phys_addr_t start_addr, phys_addr_t end_addr) { return 0; }

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#endif /* CONFIG_HAVE_MEMBLOCK */ #endif /* __KERNEL__ */ #endif /* _LINUX_MEMBLOCK_H */

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Yinghai Lu1259.44%1014.29%
David S. Miller1239.29%22.86%
Tony Luck806.04%22.86%
Ard Biesheuvel403.02%11.43%
Pavel Tatashin392.95%22.86%
Michal Hocko292.19%11.43%
Vladimir Murzin282.11%22.86%
Robin Holt282.11%11.43%
Kirill A. Shutemov211.59%11.43%
AKASHI Takahiro201.51%22.86%
Akinobu Mita171.28%11.43%
Alexander Kuleshov90.68%11.43%
Dennis Chen70.53%11.43%
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Srikar Dronamraju60.45%11.43%
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