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

#ifndef _LINUX_MEMBLOCK_H
#define _LINUX_MEMBLOCK_H
#ifdef __KERNEL__

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

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

#define INIT_MEMBLOCK_REGIONS	128
#define INIT_PHYSMEM_REGIONS	4

/* Definition of memblock flags. */
enum {
	MEMBLOCK_NONE		= 0x0,	/* No special request */
	MEMBLOCK_HOTPLUG	= 0x1,	/* hotpluggable region */
};

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);
int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);

/* 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);

/**
 * 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))

#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

#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);
int 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 */
	27	};
66b16edf	28
e3239ff9	29	struct memblock_region {
2898cc4c BH	30	phys_addr_t base;
2898cc4c BH	31	phys_addr_t size;
66a20757	32	unsigned long flags;
7c0caeb8 TH	33	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	34	int nid;
	35	#endif
95f72d1e YL	36	};
95f72d1e YL	37
e3239ff9	38	struct memblock_type {
bf23c51f BH	39	unsigned long cnt; /* number of regions */
bf23c51f BH	40	unsigned long max; /* size of the allocated array */
1440c4e2	41	phys_addr_t total_size; /* size of all regions */
bf23c51f	42	struct memblock_region *regions;
95f72d1e YL	43	};
	44
	45	struct memblock {
79442ed1	46	bool bottom_up; /* is bottom up direction? */
2898cc4c	47	phys_addr_t current_limit;
e3239ff9 BH	48	struct memblock_type memory;
e3239ff9 BH	49	struct memblock_type reserved;
70210ed9 PH	50	#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	51	struct memblock_type physmem;
	52	#endif
95f72d1e YL	53	};
	54
	55	extern struct memblock memblock;
5e63cf43	56	extern int memblock_debug;
55ac590c TC	57	#ifdef CONFIG_MOVABLE_NODE
	58	/* If movable_node boot option specified */
	59	extern bool movable_node_enabled;
	60	#endif /* CONFIG_MOVABLE_NODE */
5e63cf43 YL	61
	62	#define memblock_dbg(fmt, ...) \
	63	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
95f72d1e	64
87029ee9 GS	65	phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
87029ee9 GS	66	phys_addr_t start, phys_addr_t end,
fc6daaf9	67	int nid, ulong flags);
fc769a8e TH	68	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
fc769a8e TH	69	phys_addr_t size, phys_addr_t align);
29f67386	70	phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
5e270e25	71	phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
1aadc056	72	void memblock_allow_resize(void);
7fb0bc3f	73	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
581adcbe TH	74	int memblock_add(phys_addr_t base, phys_addr_t size);
	75	int memblock_remove(phys_addr_t base, phys_addr_t size);
	76	int memblock_free(phys_addr_t base, phys_addr_t size);
	77	int memblock_reserve(phys_addr_t base, phys_addr_t size);
6ede1fd3	78	void memblock_trim_memory(phys_addr_t align);
66b16edf TC	79	int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
66b16edf TC	80	int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
f1af9d3a PH	81
	82	/* Low level functions */
	83	int memblock_add_range(struct memblock_type *type,
	84	phys_addr_t base, phys_addr_t size,
	85	int nid, unsigned long flags);
	86
	87	int memblock_remove_range(struct memblock_type *type,
	88	phys_addr_t base,
	89	phys_addr_t size);
	90
fc6daaf9 TL	91	void __next_mem_range(u64 *idx, int nid, ulong flags,
fc6daaf9 TL	92	struct memblock_type *type_a,
f1af9d3a PH	93	struct memblock_type type_b, phys_addr_t out_start,
	94	phys_addr_t out_end, int out_nid);
	95
fc6daaf9 TL	96	void __next_mem_range_rev(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
	101	/**
	102	* for_each_mem_range - iterate through memblock areas from type_a and not
	103	* included in type_b. Or just type_a if type_b is NULL.
	104	* @i: u64 used as loop variable
	105	* @type_a: ptr to memblock_type to iterate
	106	* @type_b: ptr to memblock_type which excludes from the iteration
	107	* @nid: node selector, %NUMA_NO_NODE for all nodes
fc6daaf9	108	* @flags: pick from blocks based on memory attributes
f1af9d3a PH	109	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	110	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	111	* @p_nid: ptr to int for nid of the range, can be %NULL
	112	*/
fc6daaf9	113	#define for_each_mem_range(i, type_a, type_b, nid, flags, \
f1af9d3a	114	p_start, p_end, p_nid) \
fc6daaf9	115	for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	116	p_start, p_end, p_nid); \
f1af9d3a PH	117	i != (u64)ULLONG_MAX; \
fc6daaf9	118	__next_mem_range(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	119	p_start, p_end, p_nid))
	120
	121	/**
	122	* for_each_mem_range_rev - reverse iterate through memblock areas from
	123	* type_a and not included in type_b. Or just type_a if type_b is NULL.
	124	* @i: u64 used as loop variable
	125	* @type_a: ptr to memblock_type to iterate
	126	* @type_b: ptr to memblock_type which excludes from the iteration
	127	* @nid: node selector, %NUMA_NO_NODE for all nodes
fc6daaf9	128	* @flags: pick from blocks based on memory attributes
f1af9d3a PH	129	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	130	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	131	* @p_nid: ptr to int for nid of the range, can be %NULL
	132	*/
fc6daaf9	133	#define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \
f1af9d3a PH	134	p_start, p_end, p_nid) \
f1af9d3a PH	135	for (i = (u64)ULLONG_MAX, \
fc6daaf9	136	__next_mem_range_rev(&i, nid, flags, type_a, type_b,\
f1af9d3a PH	137	p_start, p_end, p_nid); \
f1af9d3a PH	138	i != (u64)ULLONG_MAX; \
fc6daaf9	139	__next_mem_range_rev(&i, nid, flags, type_a, type_b, \
f1af9d3a PH	140	p_start, p_end, p_nid))
f1af9d3a PH	141
55ac590c TC	142	#ifdef CONFIG_MOVABLE_NODE
	143	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	144	{
	145	return m->flags & MEMBLOCK_HOTPLUG;
	146	}
	147
	148	static inline bool movable_node_is_enabled(void)
	149	{
	150	return movable_node_enabled;
	151	}
	152	#else
	153	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	154	{
	155	return false;
	156	}
	157	static inline bool movable_node_is_enabled(void)
	158	{
	159	return false;
	160	}
	161	#endif
e63075a3	162
0ee332c1	163	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e76b63f8 YL	164	int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
e76b63f8 YL	165	unsigned long *end_pfn);
0ee332c1 TH	166	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
	167	unsigned long out_end_pfn, int out_nid);
	168
	169	/**
	170	* for_each_mem_pfn_range - early memory pfn range iterator
	171	* @i: an integer used as loop variable
	172	* @nid: node selector, %MAX_NUMNODES for all nodes
	173	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	174	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	175	* @p_nid: ptr to int for nid of the range, can be %NULL
	176	*
f2d52fe5	177	* Walks over configured memory ranges.
0ee332c1 TH	178	*/
	179	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	180	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	181	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	182	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	183
35fd0808 TH	184	/**
	185	* for_each_free_mem_range - iterate through free memblock areas
	186	* @i: u64 used as loop variable
b1154233	187	* @nid: node selector, %NUMA_NO_NODE for all nodes
35fd0808 TH	188	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	189	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	190	* @p_nid: ptr to int for nid of the range, can be %NULL
fc6daaf9	191	* @flags: pick from blocks based on memory attributes
35fd0808 TH	192	*
	193	* Walks over free (memory && !reserved) areas of memblock. Available as
	194	* soon as memblock is initialized.
	195	*/
fc6daaf9	196	#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \
f1af9d3a	197	for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
fc6daaf9	198	nid, flags, p_start, p_end, p_nid)
7bd0b0f0 TH	199
	200	/**
	201	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	202	* @i: u64 used as loop variable
b1154233	203	* @nid: node selector, %NUMA_NO_NODE for all nodes
7bd0b0f0 TH	204	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	205	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	206	* @p_nid: ptr to int for nid of the range, can be %NULL
fc6daaf9	207	* @flags: pick from blocks based on memory attributes
7bd0b0f0 TH	208	*
	209	* Walks over free (memory && !reserved) areas of memblock in reverse
	210	* order. Available as soon as memblock is initialized.
	211	*/
fc6daaf9 TL	212	#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \
fc6daaf9 TL	213	p_nid) \
f1af9d3a	214	for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
fc6daaf9	215	nid, flags, p_start, p_end, p_nid)
7bd0b0f0	216
66b16edf TC	217	static inline void memblock_set_region_flags(struct memblock_region *r,
	218	unsigned long flags)
	219	{
	220	r->flags \|= flags;
	221	}
	222
	223	static inline void memblock_clear_region_flags(struct memblock_region *r,
	224	unsigned long flags)
	225	{
	226	r->flags &= ~flags;
	227	}
	228
7c0caeb8	229	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e7e8de59 TC	230	int memblock_set_node(phys_addr_t base, phys_addr_t size,
e7e8de59 TC	231	struct memblock_type *type, int nid);
7c0caeb8 TH	232
	233	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	234	{
	235	r->nid = nid;
	236	}
	237
	238	static inline int memblock_get_region_node(const struct memblock_region *r)
	239	{
	240	return r->nid;
	241	}
	242	#else
	243	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	244	{
	245	}
	246
	247	static inline int memblock_get_region_node(const struct memblock_region *r)
	248	{
	249	return 0;
	250	}
	251	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	252
581adcbe TH	253	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
581adcbe TH	254	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	255
581adcbe	256	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3	257
79442ed1 TC	258	#ifdef CONFIG_MOVABLE_NODE
	259	/*
	260	* Set the allocation direction to bottom-up or top-down.
	261	*/
2cfb3665	262	static inline void __init memblock_set_bottom_up(bool enable)
79442ed1 TC	263	{
	264	memblock.bottom_up = enable;
	265	}
	266
	267	/*
	268	* Check if the allocation direction is bottom-up or not.
	269	* if this is true, that said, memblock will allocate memory
	270	* in bottom-up direction.
	271	*/
	272	static inline bool memblock_bottom_up(void)
	273	{
	274	return memblock.bottom_up;
	275	}
	276	#else
2cfb3665	277	static inline void __init memblock_set_bottom_up(bool enable) {}
79442ed1 TC	278	static inline bool memblock_bottom_up(void) { return false; }
	279	#endif
	280
e63075a3	281	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	282	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	283	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	284
2bfc2862	285	phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
fc6daaf9 TL	286	phys_addr_t start, phys_addr_t end,
fc6daaf9 TL	287	ulong flags);
581adcbe TH	288	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	289	phys_addr_t max_addr);
	290	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	291	phys_addr_t max_addr);
	292	phys_addr_t memblock_phys_mem_size(void);
595ad9af	293	phys_addr_t memblock_mem_size(unsigned long limit_pfn);
581adcbe TH	294	phys_addr_t memblock_start_of_DRAM(void);
	295	phys_addr_t memblock_end_of_DRAM(void);
	296	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	297	int memblock_is_memory(phys_addr_t addr);
	298	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	299	int memblock_is_reserved(phys_addr_t addr);
	300	int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
	301
4ff7b82f TH	302	extern void __memblock_dump_all(void);
	303
	304	static inline void memblock_dump_all(void)
	305	{
	306	if (memblock_debug)
	307	__memblock_dump_all();
	308	}
95f72d1e	309
e63075a3 BH	310	/**
	311	* memblock_set_current_limit - Set the current allocation limit to allow
	312	* limiting allocations to what is currently
	313	* accessible during boot
	314	* @limit: New limit value (physical address)
	315	*/
581adcbe	316	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	317
35a1f0bd	318
fec51014 LA	319	phys_addr_t memblock_get_current_limit(void);
fec51014 LA	320
5b385f25 BH	321	/*
	322	* pfn conversion functions
	323	*
	324	* While the memory MEMBLOCKs should always be page aligned, the reserved
	325	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	326	* idea of what they return for such non aligned MEMBLOCKs.
	327	*/
	328
	329	/**
c7fc2de0	330	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	331	* @reg: memblock_region structure
5b385f25 BH	332	*/
c7fc2de0	333	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	334	{
c7fc2de0	335	return PFN_UP(reg->base);
5b385f25 BH	336	}
	337
	338	/**
c7fc2de0	339	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	340	* @reg: memblock_region structure
5b385f25 BH	341	*/
c7fc2de0	342	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	343	{
c7fc2de0	344	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	345	}
	346
	347	/**
c7fc2de0	348	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	349	* @reg: memblock_region structure
5b385f25 BH	350	*/
c7fc2de0	351	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	352	{
c7fc2de0	353	return PFN_DOWN(reg->base);
5b385f25 BH	354	}
	355
	356	/**
c7fc2de0	357	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	358	* @reg: memblock_region structure
5b385f25 BH	359	*/
c7fc2de0	360	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	361	{
c7fc2de0	362	return PFN_UP(reg->base + reg->size);
5b385f25 BH	363	}
	364
	365	#define for_each_memblock(memblock_type, region) \
	366	for (region = memblock.memblock_type.regions; \
	367	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	368	region++)
	369
	370
c378ddd5	371	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
67e24bcb TH	372	#define __init_memblock __meminit
67e24bcb TH	373	#define __initdata_memblock __meminitdata
10d06439 YL	374	#else
	375	#define __init_memblock
	376	#define __initdata_memblock
	377	#endif
	378
4a20799d	379	#ifdef CONFIG_MEMTEST
7f70baee	380	extern void early_memtest(phys_addr_t start, phys_addr_t end);
4a20799d	381	#else
7f70baee	382	static inline void early_memtest(phys_addr_t start, phys_addr_t end)
4a20799d VM	383	{
	384	}
	385	#endif
	386
95dde501 YL	387	#else
	388	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	389	{
1f5026a7	390	return 0;
95dde501 YL	391	}
95dde501 YL	392
f0b37fad YL	393	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	394
95f72d1e YL	395	#endif /* __KERNEL__ */
	396
	397	#endif /* _LINUX_MEMBLOCK_H */