[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 */
	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;
};

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);
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);

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