[deliverable/linux.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 */
};

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;
};

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 */

#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);
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);

int memblock_remove_range(struct memblock_type *type,
			  phys_addr_t base,
			  phys_addr_t size);

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 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;
}

#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
 * @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
 * @flags: pick from blocks based on memory attributes
 *
 * 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
 * @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
 * @flags: pick from blocks based on memory attributes
 *
 * 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_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);
int memblock_is_memory(phys_addr_t addr);
int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
int 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++)


#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
#define __init_memblock __meminit
#define __initdata_memblock __meminitdata
#else
#define __init_memblock
#define __initdata_memblock
#endif

#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 */
fc6daaf9	28	};
66b16edf	29
e3239ff9	30	struct memblock_region {
2898cc4c BH	31	phys_addr_t base;
2898cc4c BH	32	phys_addr_t size;
66a20757	33	unsigned long flags;
7c0caeb8 TH	34	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	35	int nid;
	36	#endif
95f72d1e YL	37	};
95f72d1e YL	38
e3239ff9	39	struct memblock_type {
bf23c51f BH	40	unsigned long cnt; /* number of regions */
bf23c51f BH	41	unsigned long max; /* size of the allocated array */
1440c4e2	42	phys_addr_t total_size; /* size of all regions */
bf23c51f	43	struct memblock_region *regions;
95f72d1e YL	44	};
	45
	46	struct memblock {
79442ed1	47	bool bottom_up; /* is bottom up direction? */
2898cc4c	48	phys_addr_t current_limit;
e3239ff9 BH	49	struct memblock_type memory;
e3239ff9 BH	50	struct memblock_type reserved;
70210ed9 PH	51	#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	52	struct memblock_type physmem;
	53	#endif
95f72d1e YL	54	};
	55
	56	extern struct memblock memblock;
5e63cf43	57	extern int memblock_debug;
55ac590c TC	58	#ifdef CONFIG_MOVABLE_NODE
	59	/* If movable_node boot option specified */
	60	extern bool movable_node_enabled;
	61	#endif /* CONFIG_MOVABLE_NODE */
5e63cf43 YL	62
	63	#define memblock_dbg(fmt, ...) \
	64	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
95f72d1e	65
87029ee9 GS	66	phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
87029ee9 GS	67	phys_addr_t start, phys_addr_t end,
fc6daaf9	68	int nid, ulong flags);
fc769a8e TH	69	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
fc769a8e TH	70	phys_addr_t size, phys_addr_t align);
29f67386	71	phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
5e270e25	72	phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
1aadc056	73	void memblock_allow_resize(void);
7fb0bc3f	74	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
581adcbe TH	75	int memblock_add(phys_addr_t base, phys_addr_t size);
	76	int memblock_remove(phys_addr_t base, phys_addr_t size);
	77	int memblock_free(phys_addr_t base, phys_addr_t size);
	78	int memblock_reserve(phys_addr_t base, phys_addr_t size);
6ede1fd3	79	void memblock_trim_memory(phys_addr_t align);
95cf82ec TC	80	bool memblock_overlaps_region(struct memblock_type *type,
95cf82ec TC	81	phys_addr_t base, phys_addr_t size);
66b16edf TC	82	int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
66b16edf TC	83	int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
a3f5bafc TL	84	int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
a3f5bafc TL	85	ulong choose_memblock_flags(void);
f1af9d3a PH	86
	87	/* Low level functions */
	88	int memblock_add_range(struct memblock_type *type,
	89	phys_addr_t base, phys_addr_t size,
	90	int nid, unsigned long flags);
	91
	92	int memblock_remove_range(struct memblock_type *type,
	93	phys_addr_t base,
	94	phys_addr_t size);
	95
fc6daaf9 TL	96	void __next_mem_range(u64 *idx, int nid, ulong flags,
fc6daaf9 TL	97	struct memblock_type *type_a,
f1af9d3a PH	98	struct memblock_type type_b, phys_addr_t out_start,
	99	phys_addr_t out_end, int out_nid);
	100
fc6daaf9 TL	101	void __next_mem_range_rev(u64 *idx, int nid, ulong flags,
fc6daaf9 TL	102	struct memblock_type *type_a,
f1af9d3a PH	103	struct memblock_type type_b, phys_addr_t out_start,
	104	phys_addr_t out_end, int out_nid);
	105
8e7a7f86 RH	106	void __next_reserved_mem_region(u64 idx, phys_addr_t out_start,
	107	phys_addr_t *out_end);
	108
f1af9d3a PH	109	/**
	110	* for_each_mem_range - iterate through memblock areas from type_a and not
	111	* included in type_b. Or just type_a if type_b is NULL.
	112	* @i: u64 used as loop variable
	113	* @type_a: ptr to memblock_type to iterate
	114	* @type_b: ptr to memblock_type which excludes from the iteration
	115	* @nid: node selector, %NUMA_NO_NODE for all nodes
fc6daaf9	116	* @flags: pick from blocks based on memory attributes
f1af9d3a PH	117	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	118	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	119	* @p_nid: ptr to int for nid of the range, can be %NULL
	120	*/
fc6daaf9	121	#define for_each_mem_range(i, type_a, type_b, nid, flags, \
f1af9d3a	122	p_start, p_end, p_nid) \
fc6daaf9	123	for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	124	p_start, p_end, p_nid); \
f1af9d3a PH	125	i != (u64)ULLONG_MAX; \
fc6daaf9	126	__next_mem_range(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	127	p_start, p_end, p_nid))
	128
	129	/**
	130	* for_each_mem_range_rev - reverse iterate through memblock areas from
	131	* type_a and not included in type_b. Or just type_a if type_b is NULL.
	132	* @i: u64 used as loop variable
	133	* @type_a: ptr to memblock_type to iterate
	134	* @type_b: ptr to memblock_type which excludes from the iteration
	135	* @nid: node selector, %NUMA_NO_NODE for all nodes
fc6daaf9	136	* @flags: pick from blocks based on memory attributes
f1af9d3a PH	137	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	138	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	139	* @p_nid: ptr to int for nid of the range, can be %NULL
	140	*/
fc6daaf9	141	#define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
f1af9d3a PH	142	p_start, p_end, p_nid) \
f1af9d3a PH	143	for (i = (u64)ULLONG_MAX, \
fc6daaf9	144	__next_mem_range_rev(&i, nid, flags, type_a, type_b,\
f1af9d3a PH	145	p_start, p_end, p_nid); \
f1af9d3a PH	146	i != (u64)ULLONG_MAX; \
fc6daaf9	147	__next_mem_range_rev(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	148	p_start, p_end, p_nid))
f1af9d3a PH	149
8e7a7f86 RH	150	/**
	151	* for_each_reserved_mem_region - iterate over all reserved memblock areas
	152	* @i: u64 used as loop variable
	153	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	154	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	155	*
	156	* Walks over reserved areas of memblock. Available as soon as memblock
	157	* is initialized.
	158	*/
	159	#define for_each_reserved_mem_region(i, p_start, p_end) \
	160	for (i = 0UL, \
	161	__next_reserved_mem_region(&i, p_start, p_end); \
	162	i != (u64)ULLONG_MAX; \
	163	__next_reserved_mem_region(&i, p_start, p_end))
	164
55ac590c TC	165	#ifdef CONFIG_MOVABLE_NODE
	166	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	167	{
	168	return m->flags & MEMBLOCK_HOTPLUG;
	169	}
	170
	171	static inline bool movable_node_is_enabled(void)
	172	{
	173	return movable_node_enabled;
	174	}
	175	#else
	176	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	177	{
	178	return false;
	179	}
	180	static inline bool movable_node_is_enabled(void)
	181	{
	182	return false;
	183	}
	184	#endif
e63075a3	185
a3f5bafc TL	186	static inline bool memblock_is_mirror(struct memblock_region *m)
	187	{
	188	return m->flags & MEMBLOCK_MIRROR;
	189	}
	190
0ee332c1	191	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e76b63f8 YL	192	int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
e76b63f8 YL	193	unsigned long *end_pfn);
0ee332c1 TH	194	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
	195	unsigned long out_end_pfn, int out_nid);
	196
	197	/**
	198	* for_each_mem_pfn_range - early memory pfn range iterator
	199	* @i: an integer used as loop variable
	200	* @nid: node selector, %MAX_NUMNODES for all nodes
	201	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	202	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	203	* @p_nid: ptr to int for nid of the range, can be %NULL
	204	*
f2d52fe5	205	* Walks over configured memory ranges.
0ee332c1 TH	206	*/
	207	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	208	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	209	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	210	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	211
35fd0808 TH	212	/**
	213	* for_each_free_mem_range - iterate through free memblock areas
	214	* @i: u64 used as loop variable
b1154233	215	* @nid: node selector, %NUMA_NO_NODE for all nodes
35fd0808 TH	216	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	217	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	218	* @p_nid: ptr to int for nid of the range, can be %NULL
fc6daaf9	219	* @flags: pick from blocks based on memory attributes
35fd0808 TH	220	*
	221	* Walks over free (memory && !reserved) areas of memblock. Available as
	222	* soon as memblock is initialized.
	223	*/
fc6daaf9	224	#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
f1af9d3a	225	for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
fc6daaf9	226	nid, flags, p_start, p_end, p_nid)
7bd0b0f0 TH	227
	228	/**
	229	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	230	* @i: u64 used as loop variable
b1154233	231	* @nid: node selector, %NUMA_NO_NODE for all nodes
7bd0b0f0 TH	232	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	233	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	234	* @p_nid: ptr to int for nid of the range, can be %NULL
fc6daaf9	235	* @flags: pick from blocks based on memory attributes
7bd0b0f0 TH	236	*
	237	* Walks over free (memory && !reserved) areas of memblock in reverse
	238	* order. Available as soon as memblock is initialized.
	239	*/
fc6daaf9 TL	240	#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
fc6daaf9 TL	241	p_nid) \
f1af9d3a	242	for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
fc6daaf9	243	nid, flags, p_start, p_end, p_nid)
7bd0b0f0	244
66b16edf TC	245	static inline void memblock_set_region_flags(struct memblock_region *r,
	246	unsigned long flags)
	247	{
	248	r->flags \|= flags;
	249	}
	250
	251	static inline void memblock_clear_region_flags(struct memblock_region *r,
	252	unsigned long flags)
	253	{
	254	r->flags &= ~flags;
	255	}
	256
7c0caeb8	257	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e7e8de59 TC	258	int memblock_set_node(phys_addr_t base, phys_addr_t size,
e7e8de59 TC	259	struct memblock_type *type, int nid);
7c0caeb8 TH	260
	261	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	262	{
	263	r->nid = nid;
	264	}
	265
	266	static inline int memblock_get_region_node(const struct memblock_region *r)
	267	{
	268	return r->nid;
	269	}
	270	#else
	271	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	272	{
	273	}
	274
	275	static inline int memblock_get_region_node(const struct memblock_region *r)
	276	{
	277	return 0;
	278	}
	279	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	280
581adcbe TH	281	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
581adcbe TH	282	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	283
581adcbe	284	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3	285
79442ed1 TC	286	#ifdef CONFIG_MOVABLE_NODE
	287	/*
	288	* Set the allocation direction to bottom-up or top-down.
	289	*/
2cfb3665	290	static inline void __init memblock_set_bottom_up(bool enable)
79442ed1 TC	291	{
	292	memblock.bottom_up = enable;
	293	}
	294
	295	/*
	296	* Check if the allocation direction is bottom-up or not.
	297	* if this is true, that said, memblock will allocate memory
	298	* in bottom-up direction.
	299	*/
	300	static inline bool memblock_bottom_up(void)
	301	{
	302	return memblock.bottom_up;
	303	}
	304	#else
2cfb3665	305	static inline void __init memblock_set_bottom_up(bool enable) {}
79442ed1 TC	306	static inline bool memblock_bottom_up(void) { return false; }
	307	#endif
	308
e63075a3	309	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	310	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	311	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	312
2bfc2862	313	phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
fc6daaf9 TL	314	phys_addr_t start, phys_addr_t end,
fc6daaf9 TL	315	ulong flags);
581adcbe TH	316	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	317	phys_addr_t max_addr);
	318	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	319	phys_addr_t max_addr);
	320	phys_addr_t memblock_phys_mem_size(void);
595ad9af	321	phys_addr_t memblock_mem_size(unsigned long limit_pfn);
581adcbe TH	322	phys_addr_t memblock_start_of_DRAM(void);
	323	phys_addr_t memblock_end_of_DRAM(void);
	324	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	325	int memblock_is_memory(phys_addr_t addr);
	326	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	327	int memblock_is_reserved(phys_addr_t addr);
c5c5c9d1	328	bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
581adcbe	329
4ff7b82f TH	330	extern void __memblock_dump_all(void);
	331
	332	static inline void memblock_dump_all(void)
	333	{
	334	if (memblock_debug)
	335	__memblock_dump_all();
	336	}
95f72d1e	337
e63075a3 BH	338	/**
	339	* memblock_set_current_limit - Set the current allocation limit to allow
	340	* limiting allocations to what is currently
	341	* accessible during boot
	342	* @limit: New limit value (physical address)
	343	*/
581adcbe	344	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	345
35a1f0bd	346
fec51014 LA	347	phys_addr_t memblock_get_current_limit(void);
fec51014 LA	348
5b385f25 BH	349	/*
	350	* pfn conversion functions
	351	*
	352	* While the memory MEMBLOCKs should always be page aligned, the reserved
	353	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	354	* idea of what they return for such non aligned MEMBLOCKs.
	355	*/
	356
	357	/**
c7fc2de0	358	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	359	* @reg: memblock_region structure
5b385f25 BH	360	*/
c7fc2de0	361	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	362	{
c7fc2de0	363	return PFN_UP(reg->base);
5b385f25 BH	364	}
	365
	366	/**
c7fc2de0	367	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	368	* @reg: memblock_region structure
5b385f25 BH	369	*/
c7fc2de0	370	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	371	{
c7fc2de0	372	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	373	}
	374
	375	/**
c7fc2de0	376	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	377	* @reg: memblock_region structure
5b385f25 BH	378	*/
c7fc2de0	379	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	380	{
c7fc2de0	381	return PFN_DOWN(reg->base);
5b385f25 BH	382	}
	383
	384	/**
c7fc2de0	385	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	386	* @reg: memblock_region structure
5b385f25 BH	387	*/
c7fc2de0	388	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	389	{
c7fc2de0	390	return PFN_UP(reg->base + reg->size);
5b385f25 BH	391	}
	392
	393	#define for_each_memblock(memblock_type, region) \
	394	for (region = memblock.memblock_type.regions; \
	395	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	396	region++)
	397
	398
c378ddd5	399	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
67e24bcb TH	400	#define __init_memblock __meminit
67e24bcb TH	401	#define __initdata_memblock __meminitdata
10d06439 YL	402	#else
	403	#define __init_memblock
	404	#define __initdata_memblock
	405	#endif
	406
4a20799d	407	#ifdef CONFIG_MEMTEST
7f70baee	408	extern void early_memtest(phys_addr_t start, phys_addr_t end);
4a20799d	409	#else
7f70baee	410	static inline void early_memtest(phys_addr_t start, phys_addr_t end)
4a20799d VM	411	{
	412	}
	413	#endif
	414
95dde501 YL	415	#else
	416	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	417	{
1f5026a7	418	return 0;
95dde501 YL	419	}
95dde501 YL	420
f0b37fad YL	421	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	422
95f72d1e YL	423	#endif /* __KERNEL__ */
	424
	425	#endif /* _LINUX_MEMBLOCK_H */