[mirror_ubuntu-bionic-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 */
};

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);

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