[mirror_ubuntu-artful-kernel.git] / include / linux / memblock.h

#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_MOVABLE_NODE
/* If movable_node boot option specified */
extern bool movable_node_enabled;
#endif /* CONFIG_MOVABLE_NODE */

#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
#define __init_memblock __meminit
#define __initdata_memblock __meminitdata
#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);
phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
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);

/**
 * 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))

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

static inline bool __init_memblock movable_node_is_enabled(void)
{
	return movable_node_enabled;
}
#else
static inline bool memblock_is_hotpluggable(struct memblock_region *m)
{
	return false;
}
static inline bool movable_node_is_enabled(void)
{
	return false;
}
#endif

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

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

#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);
unsigned long memblock_next_valid_pfn(unsigned long pfn, unsigned long max_pfn);

/**
 * 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)

static inline void memblock_set_region_flags(struct memblock_region *r,
					     unsigned long flags)
{
	r->flags |= flags;
}

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

#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;
}

static inline int memblock_get_region_node(const struct memblock_region *r)
{
	return r->nid;
}
#else
static inline void memblock_set_region_node(struct memblock_region *r, int nid)
{
}

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

#ifdef CONFIG_MOVABLE_NODE
/*
 * Set the allocation direction to bottom-up or top-down.
 */
static inline void __init memblock_set_bottom_up(bool enable)
{
	memblock.bottom_up = enable;
}

/*
 * 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;
}
#else
static inline void __init memblock_set_bottom_up(bool enable) {}
static inline bool memblock_bottom_up(void) { return false; }
#endif

/* 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_mem_limit_remove_map(phys_addr_t limit);
bool memblock_is_memory(phys_addr_t addr);
int memblock_is_map_memory(phys_addr_t addr);
int 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();
}

/**
 * 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);
}

/**
 * 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);
}

/**
 * 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);
}

/**
 * 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);
}

#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(memblock_type, rgn)			\
	for (idx = 0, rgn = &memblock_type->regions[0];			\
	     idx < memblock_type->cnt;					\
	     idx++, rgn = &memblock_type->regions[idx])

#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)
{
}
#endif

#else
static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
{
	return 0;
}

#endif /* CONFIG_HAVE_MEMBLOCK */

#endif /* __KERNEL__ */

#endif /* _LINUX_MEMBLOCK_H */
Commit	Line	Data
95f72d1e YL	1	#ifndef _LINUX_MEMBLOCK_H
	2	#define _LINUX_MEMBLOCK_H
	3	#ifdef __KERNEL__
	4
f0b37fad	5	#ifdef CONFIG_HAVE_MEMBLOCK
95f72d1e YL	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
37d8d4bf	20	#define INIT_MEMBLOCK_REGIONS 128
70210ed9	21	#define INIT_PHYSMEM_REGIONS 4
95f72d1e	22
66b16edf	23	/* Definition of memblock flags. */
fc6daaf9 TL	24	enum {
	25	MEMBLOCK_NONE = 0x0, /* No special request */
	26	MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
a3f5bafc	27	MEMBLOCK_MIRROR = 0x2, /* mirrored region */
bf3d3cc5	28	MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
fc6daaf9	29	};
66b16edf	30
e3239ff9	31	struct memblock_region {
2898cc4c BH	32	phys_addr_t base;
2898cc4c BH	33	phys_addr_t size;
66a20757	34	unsigned long flags;
7c0caeb8 TH	35	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	36	int nid;
	37	#endif
95f72d1e YL	38	};
95f72d1e YL	39
e3239ff9	40	struct memblock_type {
bf23c51f BH	41	unsigned long cnt; /* number of regions */
bf23c51f BH	42	unsigned long max; /* size of the allocated array */
1440c4e2	43	phys_addr_t total_size; /* size of all regions */
bf23c51f	44	struct memblock_region *regions;
0262d9c8	45	char *name;
95f72d1e YL	46	};
	47
	48	struct memblock {
79442ed1	49	bool bottom_up; /* is bottom up direction? */
2898cc4c	50	phys_addr_t current_limit;
e3239ff9 BH	51	struct memblock_type memory;
e3239ff9 BH	52	struct memblock_type reserved;
70210ed9 PH	53	#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	54	struct memblock_type physmem;
	55	#endif
95f72d1e YL	56	};
	57
	58	extern struct memblock memblock;
5e63cf43	59	extern int memblock_debug;
55ac590c TC	60	#ifdef CONFIG_MOVABLE_NODE
	61	/* If movable_node boot option specified */
	62	extern bool movable_node_enabled;
	63	#endif /* CONFIG_MOVABLE_NODE */
5e63cf43	64
036fbb21 KS	65	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
	66	#define __init_memblock __meminit
	67	#define __initdata_memblock __meminitdata
	68	#else
	69	#define __init_memblock
	70	#define __initdata_memblock
	71	#endif
	72
5e63cf43 YL	73	#define memblock_dbg(fmt, ...) \
5e63cf43 YL	74	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
95f72d1e	75
87029ee9	76	phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
ba6c19fd CG	77	phys_addr_t start, phys_addr_t end,
ba6c19fd CG	78	int nid, ulong flags);
fc769a8e TH	79	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
fc769a8e TH	80	phys_addr_t size, phys_addr_t align);
29f67386	81	phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
5e270e25	82	phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
1aadc056	83	void memblock_allow_resize(void);
7fb0bc3f	84	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
581adcbe TH	85	int memblock_add(phys_addr_t base, phys_addr_t size);
	86	int memblock_remove(phys_addr_t base, phys_addr_t size);
	87	int memblock_free(phys_addr_t base, phys_addr_t size);
	88	int memblock_reserve(phys_addr_t base, phys_addr_t size);
6ede1fd3	89	void memblock_trim_memory(phys_addr_t align);
95cf82ec TC	90	bool memblock_overlaps_region(struct memblock_type *type,
95cf82ec TC	91	phys_addr_t base, phys_addr_t size);
66b16edf TC	92	int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
66b16edf TC	93	int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
a3f5bafc	94	int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
bf3d3cc5	95	int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
4c546b8a	96	int memblock_clear_nomap(phys_addr_t base, phys_addr_t size);
a3f5bafc	97	ulong choose_memblock_flags(void);
f1af9d3a PH	98
	99	/* Low level functions */
	100	int memblock_add_range(struct memblock_type *type,
	101	phys_addr_t base, phys_addr_t size,
	102	int nid, unsigned long flags);
	103
fc6daaf9 TL	104	void __next_mem_range(u64 *idx, int nid, ulong flags,
fc6daaf9 TL	105	struct memblock_type *type_a,
f1af9d3a PH	106	struct memblock_type type_b, phys_addr_t out_start,
	107	phys_addr_t out_end, int out_nid);
	108
fc6daaf9 TL	109	void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
fc6daaf9 TL	110	struct memblock_type *type_a,
f1af9d3a PH	111	struct memblock_type type_b, phys_addr_t out_start,
	112	phys_addr_t out_end, int out_nid);
	113
8e7a7f86	114	void __next_reserved_mem_region(u64 idx, phys_addr_t out_start,
ba6c19fd	115	phys_addr_t *out_end);
8e7a7f86	116
f1af9d3a PH	117	/**
	118	* for_each_mem_range - iterate through memblock areas from type_a and not
	119	* included in type_b. Or just type_a if type_b is NULL.
	120	* @i: u64 used as loop variable
	121	* @type_a: ptr to memblock_type to iterate
	122	* @type_b: ptr to memblock_type which excludes from the iteration
	123	* @nid: node selector, %NUMA_NO_NODE for all nodes
fc6daaf9	124	* @flags: pick from blocks based on memory attributes
f1af9d3a PH	125	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	126	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	127	* @p_nid: ptr to int for nid of the range, can be %NULL
	128	*/
fc6daaf9	129	#define for_each_mem_range(i, type_a, type_b, nid, flags, \
f1af9d3a	130	p_start, p_end, p_nid) \
fc6daaf9	131	for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	132	p_start, p_end, p_nid); \
f1af9d3a PH	133	i != (u64)ULLONG_MAX; \
fc6daaf9	134	__next_mem_range(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	135	p_start, p_end, p_nid))
	136
	137	/**
	138	* for_each_mem_range_rev - reverse iterate through memblock areas from
	139	* type_a and not included in type_b. Or just type_a if type_b is NULL.
	140	* @i: u64 used as loop variable
	141	* @type_a: ptr to memblock_type to iterate
	142	* @type_b: ptr to memblock_type which excludes from the iteration
	143	* @nid: node selector, %NUMA_NO_NODE for all nodes
fc6daaf9	144	* @flags: pick from blocks based on memory attributes
f1af9d3a PH	145	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	146	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	147	* @p_nid: ptr to int for nid of the range, can be %NULL
	148	*/
fc6daaf9	149	#define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
f1af9d3a PH	150	p_start, p_end, p_nid) \
f1af9d3a PH	151	for (i = (u64)ULLONG_MAX, \
fc6daaf9	152	__next_mem_range_rev(&i, nid, flags, type_a, type_b,\
ba6c19fd	153	p_start, p_end, p_nid); \
f1af9d3a	154	i != (u64)ULLONG_MAX; \
fc6daaf9	155	__next_mem_range_rev(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	156	p_start, p_end, p_nid))
f1af9d3a PH	157
8e7a7f86 RH	158	/**
	159	* for_each_reserved_mem_region - iterate over all reserved memblock areas
	160	* @i: u64 used as loop variable
	161	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	162	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	163	*
	164	* Walks over reserved areas of memblock. Available as soon as memblock
	165	* is initialized.
	166	*/
	167	#define for_each_reserved_mem_region(i, p_start, p_end) \
ba6c19fd	168	for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \
8e7a7f86 RH	169	i != (u64)ULLONG_MAX; \
	170	__next_reserved_mem_region(&i, p_start, p_end))
	171
55ac590c TC	172	#ifdef CONFIG_MOVABLE_NODE
	173	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	174	{
	175	return m->flags & MEMBLOCK_HOTPLUG;
	176	}
	177
036fbb21	178	static inline bool __init_memblock movable_node_is_enabled(void)
55ac590c TC	179	{
	180	return movable_node_enabled;
	181	}
	182	#else
	183	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	184	{
	185	return false;
	186	}
	187	static inline bool movable_node_is_enabled(void)
	188	{
	189	return false;
	190	}
	191	#endif
e63075a3	192
a3f5bafc TL	193	static inline bool memblock_is_mirror(struct memblock_region *m)
	194	{
	195	return m->flags & MEMBLOCK_MIRROR;
	196	}
	197
bf3d3cc5 AB	198	static inline bool memblock_is_nomap(struct memblock_region *m)
	199	{
	200	return m->flags & MEMBLOCK_NOMAP;
	201	}
	202
0ee332c1	203	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e76b63f8 YL	204	int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
e76b63f8 YL	205	unsigned long *end_pfn);
0ee332c1 TH	206	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
0ee332c1 TH	207	unsigned long out_end_pfn, int out_nid);
b92df1de	208	unsigned long memblock_next_valid_pfn(unsigned long pfn, unsigned long max_pfn);
0ee332c1 TH	209
	210	/**
	211	* for_each_mem_pfn_range - early memory pfn range iterator
	212	* @i: an integer used as loop variable
	213	* @nid: node selector, %MAX_NUMNODES for all nodes
	214	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	215	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	216	* @p_nid: ptr to int for nid of the range, can be %NULL
	217	*
f2d52fe5	218	* Walks over configured memory ranges.
0ee332c1 TH	219	*/
	220	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	221	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	222	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	223	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	224
35fd0808 TH	225	/**
	226	* for_each_free_mem_range - iterate through free memblock areas
	227	* @i: u64 used as loop variable
b1154233	228	* @nid: node selector, %NUMA_NO_NODE for all nodes
d30b5545	229	* @flags: pick from blocks based on memory attributes
35fd0808 TH	230	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	231	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	232	* @p_nid: ptr to int for nid of the range, can be %NULL
	233	*
	234	* Walks over free (memory && !reserved) areas of memblock. Available as
	235	* soon as memblock is initialized.
	236	*/
fc6daaf9	237	#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
f1af9d3a	238	for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
fc6daaf9	239	nid, flags, p_start, p_end, p_nid)
7bd0b0f0 TH	240
	241	/**
	242	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	243	* @i: u64 used as loop variable
b1154233	244	* @nid: node selector, %NUMA_NO_NODE for all nodes
d30b5545	245	* @flags: pick from blocks based on memory attributes
7bd0b0f0 TH	246	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	247	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	248	* @p_nid: ptr to int for nid of the range, can be %NULL
	249	*
	250	* Walks over free (memory && !reserved) areas of memblock in reverse
	251	* order. Available as soon as memblock is initialized.
	252	*/
fc6daaf9 TL	253	#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
fc6daaf9 TL	254	p_nid) \
f1af9d3a	255	for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
fc6daaf9	256	nid, flags, p_start, p_end, p_nid)
7bd0b0f0	257
66b16edf TC	258	static inline void memblock_set_region_flags(struct memblock_region *r,
	259	unsigned long flags)
	260	{
	261	r->flags \|= flags;
	262	}
	263
	264	static inline void memblock_clear_region_flags(struct memblock_region *r,
	265	unsigned long flags)
	266	{
	267	r->flags &= ~flags;
	268	}
	269
7c0caeb8	270	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e7e8de59 TC	271	int memblock_set_node(phys_addr_t base, phys_addr_t size,
e7e8de59 TC	272	struct memblock_type *type, int nid);
7c0caeb8 TH	273
	274	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	275	{
	276	r->nid = nid;
	277	}
	278
	279	static inline int memblock_get_region_node(const struct memblock_region *r)
	280	{
	281	return r->nid;
	282	}
	283	#else
	284	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	285	{
	286	}
	287
	288	static inline int memblock_get_region_node(const struct memblock_region *r)
	289	{
	290	return 0;
	291	}
	292	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	293
581adcbe TH	294	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
581adcbe TH	295	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	296
581adcbe	297	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3	298
79442ed1 TC	299	#ifdef CONFIG_MOVABLE_NODE
	300	/*
	301	* Set the allocation direction to bottom-up or top-down.
	302	*/
2cfb3665	303	static inline void __init memblock_set_bottom_up(bool enable)
79442ed1 TC	304	{
	305	memblock.bottom_up = enable;
	306	}
	307
	308	/*
	309	* Check if the allocation direction is bottom-up or not.
	310	* if this is true, that said, memblock will allocate memory
	311	* in bottom-up direction.
	312	*/
	313	static inline bool memblock_bottom_up(void)
	314	{
	315	return memblock.bottom_up;
	316	}
	317	#else
2cfb3665	318	static inline void __init memblock_set_bottom_up(bool enable) {}
79442ed1 TC	319	static inline bool memblock_bottom_up(void) { return false; }
	320	#endif
	321
e63075a3	322	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	323	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	324	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	325
2bfc2862	326	phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
fc6daaf9 TL	327	phys_addr_t start, phys_addr_t end,
fc6daaf9 TL	328	ulong flags);
581adcbe TH	329	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	330	phys_addr_t max_addr);
	331	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	332	phys_addr_t max_addr);
	333	phys_addr_t memblock_phys_mem_size(void);
8907de5d	334	phys_addr_t memblock_reserved_size(void);
595ad9af	335	phys_addr_t memblock_mem_size(unsigned long limit_pfn);
581adcbe TH	336	phys_addr_t memblock_start_of_DRAM(void);
	337	phys_addr_t memblock_end_of_DRAM(void);
	338	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
a571d4eb	339	void memblock_mem_limit_remove_map(phys_addr_t limit);
b4ad0c7e	340	bool memblock_is_memory(phys_addr_t addr);
bf3d3cc5	341	int memblock_is_map_memory(phys_addr_t addr);
581adcbe	342	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
b4ad0c7e	343	bool memblock_is_reserved(phys_addr_t addr);
c5c5c9d1	344	bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
581adcbe	345
4ff7b82f TH	346	extern void __memblock_dump_all(void);
	347
	348	static inline void memblock_dump_all(void)
	349	{
	350	if (memblock_debug)
	351	__memblock_dump_all();
	352	}
95f72d1e	353
e63075a3 BH	354	/**
	355	* memblock_set_current_limit - Set the current allocation limit to allow
	356	* limiting allocations to what is currently
	357	* accessible during boot
	358	* @limit: New limit value (physical address)
	359	*/
581adcbe	360	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	361
35a1f0bd	362
fec51014 LA	363	phys_addr_t memblock_get_current_limit(void);
fec51014 LA	364
5b385f25 BH	365	/*
	366	* pfn conversion functions
	367	*
	368	* While the memory MEMBLOCKs should always be page aligned, the reserved
	369	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	370	* idea of what they return for such non aligned MEMBLOCKs.
	371	*/
	372
	373	/**
c7fc2de0	374	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	375	* @reg: memblock_region structure
5b385f25 BH	376	*/
c7fc2de0	377	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	378	{
c7fc2de0	379	return PFN_UP(reg->base);
5b385f25 BH	380	}
	381
	382	/**
c7fc2de0	383	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	384	* @reg: memblock_region structure
5b385f25 BH	385	*/
c7fc2de0	386	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	387	{
c7fc2de0	388	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	389	}
	390
	391	/**
c7fc2de0	392	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	393	* @reg: memblock_region structure
5b385f25 BH	394	*/
c7fc2de0	395	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	396	{
c7fc2de0	397	return PFN_DOWN(reg->base);
5b385f25 BH	398	}
	399
	400	/**
c7fc2de0	401	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	402	* @reg: memblock_region structure
5b385f25 BH	403	*/
c7fc2de0	404	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	405	{
c7fc2de0	406	return PFN_UP(reg->base + reg->size);
5b385f25 BH	407	}
	408
	409	#define for_each_memblock(memblock_type, region) \
ba6c19fd	410	for (region = memblock.memblock_type.regions; \
5b385f25 BH	411	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	412	region++)
	413
8c9c1701	414	#define for_each_memblock_type(memblock_type, rgn) \
ba6c19fd CG	415	for (idx = 0, rgn = &memblock_type->regions[0]; \
	416	idx < memblock_type->cnt; \
	417	idx++, rgn = &memblock_type->regions[idx])
5b385f25	418
4a20799d	419	#ifdef CONFIG_MEMTEST
7f70baee	420	extern void early_memtest(phys_addr_t start, phys_addr_t end);
4a20799d	421	#else
7f70baee	422	static inline void early_memtest(phys_addr_t start, phys_addr_t end)
4a20799d VM	423	{
	424	}
	425	#endif
	426
95dde501 YL	427	#else
	428	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	429	{
1f5026a7	430	return 0;
95dde501 YL	431	}
95dde501 YL	432
f0b37fad YL	433	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	434
95f72d1e YL	435	#endif /* __KERNEL__ */
	436
	437	#endif /* _LINUX_MEMBLOCK_H */