[linux-2.6-block.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. */
#define 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);
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, 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, 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
 * @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,			\
			   p_start, p_end, p_nid)			\
	for (i = 0, __next_mem_range(&i, nid, type_a, type_b,		\
				     p_start, p_end, p_nid);		\
	     i != (u64)ULLONG_MAX;					\
	     __next_mem_range(&i, nid, 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
 * @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,			\
			       p_start, p_end, p_nid)			\
	for (i = (u64)ULLONG_MAX,					\
		     __next_mem_range_rev(&i, nid, type_a, type_b,	\
					 p_start, p_end, p_nid);	\
	     i != (u64)ULLONG_MAX;					\
	     __next_mem_range_rev(&i, nid, 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
 *
 * Walks over free (memory && !reserved) areas of memblock.  Available as
 * soon as memblock is initialized.
 */
#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid)		\
	for_each_mem_range(i, &memblock.memory, &memblock.reserved,	\
			   nid, 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
 *
 * 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, p_start, p_end, p_nid)	\
	for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved,	\
			       nid, 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);
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 TC	23	/* Definition of memblock flags. */
	24	#define MEMBLOCK_HOTPLUG 0x1 /* hotpluggable region */
	25
e3239ff9	26	struct memblock_region {
2898cc4c BH	27	phys_addr_t base;
2898cc4c BH	28	phys_addr_t size;
66a20757	29	unsigned long flags;
7c0caeb8 TH	30	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	31	int nid;
	32	#endif
95f72d1e YL	33	};
95f72d1e YL	34
e3239ff9	35	struct memblock_type {
bf23c51f BH	36	unsigned long cnt; /* number of regions */
bf23c51f BH	37	unsigned long max; /* size of the allocated array */
1440c4e2	38	phys_addr_t total_size; /* size of all regions */
bf23c51f	39	struct memblock_region *regions;
95f72d1e YL	40	};
	41
	42	struct memblock {
79442ed1	43	bool bottom_up; /* is bottom up direction? */
2898cc4c	44	phys_addr_t current_limit;
e3239ff9 BH	45	struct memblock_type memory;
e3239ff9 BH	46	struct memblock_type reserved;
70210ed9 PH	47	#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	48	struct memblock_type physmem;
	49	#endif
95f72d1e YL	50	};
	51
	52	extern struct memblock memblock;
5e63cf43	53	extern int memblock_debug;
55ac590c TC	54	#ifdef CONFIG_MOVABLE_NODE
	55	/* If movable_node boot option specified */
	56	extern bool movable_node_enabled;
	57	#endif /* CONFIG_MOVABLE_NODE */
5e63cf43 YL	58
	59	#define memblock_dbg(fmt, ...) \
	60	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
95f72d1e	61
87029ee9 GS	62	phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align,
	63	phys_addr_t start, phys_addr_t end,
	64	int nid);
fc769a8e TH	65	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
fc769a8e TH	66	phys_addr_t size, phys_addr_t align);
29f67386	67	phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
5e270e25	68	phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr);
1aadc056	69	void memblock_allow_resize(void);
7fb0bc3f	70	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
581adcbe TH	71	int memblock_add(phys_addr_t base, phys_addr_t size);
	72	int memblock_remove(phys_addr_t base, phys_addr_t size);
	73	int memblock_free(phys_addr_t base, phys_addr_t size);
	74	int memblock_reserve(phys_addr_t base, phys_addr_t size);
6ede1fd3	75	void memblock_trim_memory(phys_addr_t align);
66b16edf TC	76	int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
66b16edf TC	77	int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
f1af9d3a PH	78
	79	/* Low level functions */
	80	int memblock_add_range(struct memblock_type *type,
	81	phys_addr_t base, phys_addr_t size,
	82	int nid, unsigned long flags);
	83
	84	int memblock_remove_range(struct memblock_type *type,
	85	phys_addr_t base,
	86	phys_addr_t size);
	87
	88	void __next_mem_range(u64 idx, int nid, struct memblock_type type_a,
	89	struct memblock_type type_b, phys_addr_t out_start,
	90	phys_addr_t out_end, int out_nid);
	91
	92	void __next_mem_range_rev(u64 idx, int nid, struct memblock_type type_a,
	93	struct memblock_type type_b, phys_addr_t out_start,
	94	phys_addr_t out_end, int out_nid);
	95
	96	/**
	97	* for_each_mem_range - iterate through memblock areas from type_a and not
	98	* included in type_b. Or just type_a if type_b is NULL.
	99	* @i: u64 used as loop variable
	100	* @type_a: ptr to memblock_type to iterate
	101	* @type_b: ptr to memblock_type which excludes from the iteration
	102	* @nid: node selector, %NUMA_NO_NODE for all nodes
	103	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	104	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	105	* @p_nid: ptr to int for nid of the range, can be %NULL
	106	*/
	107	#define for_each_mem_range(i, type_a, type_b, nid, \
	108	p_start, p_end, p_nid) \
	109	for (i = 0, __next_mem_range(&i, nid, type_a, type_b, \
	110	p_start, p_end, p_nid); \
	111	i != (u64)ULLONG_MAX; \
	112	__next_mem_range(&i, nid, type_a, type_b, \
	113	p_start, p_end, p_nid))
	114
	115	/**
	116	* for_each_mem_range_rev - reverse iterate through memblock areas from
	117	* type_a and not 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
	122	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	123	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	124	* @p_nid: ptr to int for nid of the range, can be %NULL
	125	*/
	126	#define for_each_mem_range_rev(i, type_a, type_b, nid, \
	127	p_start, p_end, p_nid) \
	128	for (i = (u64)ULLONG_MAX, \
	129	__next_mem_range_rev(&i, nid, type_a, type_b, \
	130	p_start, p_end, p_nid); \
	131	i != (u64)ULLONG_MAX; \
	132	__next_mem_range_rev(&i, nid, type_a, type_b, \
	133	p_start, p_end, p_nid))
	134
55ac590c TC	135	#ifdef CONFIG_MOVABLE_NODE
	136	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	137	{
	138	return m->flags & MEMBLOCK_HOTPLUG;
	139	}
	140
	141	static inline bool movable_node_is_enabled(void)
	142	{
	143	return movable_node_enabled;
	144	}
	145	#else
	146	static inline bool memblock_is_hotpluggable(struct memblock_region *m)
	147	{
	148	return false;
	149	}
	150	static inline bool movable_node_is_enabled(void)
	151	{
	152	return false;
	153	}
	154	#endif
e63075a3	155
0ee332c1	156	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e76b63f8 YL	157	int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
e76b63f8 YL	158	unsigned long *end_pfn);
0ee332c1 TH	159	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
	160	unsigned long out_end_pfn, int out_nid);
	161
	162	/**
	163	* for_each_mem_pfn_range - early memory pfn range iterator
	164	* @i: an integer used as loop variable
	165	* @nid: node selector, %MAX_NUMNODES for all nodes
	166	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	167	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	168	* @p_nid: ptr to int for nid of the range, can be %NULL
	169	*
f2d52fe5	170	* Walks over configured memory ranges.
0ee332c1 TH	171	*/
	172	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	173	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	174	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	175	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	176
35fd0808 TH	177	/**
	178	* for_each_free_mem_range - iterate through free memblock areas
	179	* @i: u64 used as loop variable
b1154233	180	* @nid: node selector, %NUMA_NO_NODE for all nodes
35fd0808 TH	181	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	182	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	183	* @p_nid: ptr to int for nid of the range, can be %NULL
	184	*
	185	* Walks over free (memory && !reserved) areas of memblock. Available as
	186	* soon as memblock is initialized.
	187	*/
	188	#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
f1af9d3a PH	189	for_each_mem_range(i, &memblock.memory, &memblock.reserved, \
f1af9d3a PH	190	nid, p_start, p_end, p_nid)
7bd0b0f0 TH	191
	192	/**
	193	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	194	* @i: u64 used as loop variable
b1154233	195	* @nid: node selector, %NUMA_NO_NODE for all nodes
7bd0b0f0 TH	196	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	197	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	198	* @p_nid: ptr to int for nid of the range, can be %NULL
	199	*
	200	* Walks over free (memory && !reserved) areas of memblock in reverse
	201	* order. Available as soon as memblock is initialized.
	202	*/
	203	#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
f1af9d3a PH	204	for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \
f1af9d3a PH	205	nid, p_start, p_end, p_nid)
7bd0b0f0	206
66b16edf TC	207	static inline void memblock_set_region_flags(struct memblock_region *r,
	208	unsigned long flags)
	209	{
	210	r->flags \|= flags;
	211	}
	212
	213	static inline void memblock_clear_region_flags(struct memblock_region *r,
	214	unsigned long flags)
	215	{
	216	r->flags &= ~flags;
	217	}
	218
7c0caeb8	219	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e7e8de59 TC	220	int memblock_set_node(phys_addr_t base, phys_addr_t size,
e7e8de59 TC	221	struct memblock_type *type, int nid);
7c0caeb8 TH	222
	223	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	224	{
	225	r->nid = nid;
	226	}
	227
	228	static inline int memblock_get_region_node(const struct memblock_region *r)
	229	{
	230	return r->nid;
	231	}
	232	#else
	233	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	234	{
	235	}
	236
	237	static inline int memblock_get_region_node(const struct memblock_region *r)
	238	{
	239	return 0;
	240	}
	241	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	242
581adcbe TH	243	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
581adcbe TH	244	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	245
581adcbe	246	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3	247
79442ed1 TC	248	#ifdef CONFIG_MOVABLE_NODE
	249	/*
	250	* Set the allocation direction to bottom-up or top-down.
	251	*/
2cfb3665	252	static inline void __init memblock_set_bottom_up(bool enable)
79442ed1 TC	253	{
	254	memblock.bottom_up = enable;
	255	}
	256
	257	/*
	258	* Check if the allocation direction is bottom-up or not.
	259	* if this is true, that said, memblock will allocate memory
	260	* in bottom-up direction.
	261	*/
	262	static inline bool memblock_bottom_up(void)
	263	{
	264	return memblock.bottom_up;
	265	}
	266	#else
2cfb3665	267	static inline void __init memblock_set_bottom_up(bool enable) {}
79442ed1 TC	268	static inline bool memblock_bottom_up(void) { return false; }
	269	#endif
	270
e63075a3	271	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	272	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	273	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	274
2bfc2862 AM	275	phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
2bfc2862 AM	276	phys_addr_t start, phys_addr_t end);
581adcbe TH	277	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	278	phys_addr_t max_addr);
	279	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	280	phys_addr_t max_addr);
	281	phys_addr_t memblock_phys_mem_size(void);
595ad9af	282	phys_addr_t memblock_mem_size(unsigned long limit_pfn);
581adcbe TH	283	phys_addr_t memblock_start_of_DRAM(void);
	284	phys_addr_t memblock_end_of_DRAM(void);
	285	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	286	int memblock_is_memory(phys_addr_t addr);
	287	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	288	int memblock_is_reserved(phys_addr_t addr);
	289	int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
	290
4ff7b82f TH	291	extern void __memblock_dump_all(void);
	292
	293	static inline void memblock_dump_all(void)
	294	{
	295	if (memblock_debug)
	296	__memblock_dump_all();
	297	}
95f72d1e	298
e63075a3 BH	299	/**
	300	* memblock_set_current_limit - Set the current allocation limit to allow
	301	* limiting allocations to what is currently
	302	* accessible during boot
	303	* @limit: New limit value (physical address)
	304	*/
581adcbe	305	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	306
35a1f0bd	307
fec51014 LA	308	phys_addr_t memblock_get_current_limit(void);
fec51014 LA	309
5b385f25 BH	310	/*
	311	* pfn conversion functions
	312	*
	313	* While the memory MEMBLOCKs should always be page aligned, the reserved
	314	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	315	* idea of what they return for such non aligned MEMBLOCKs.
	316	*/
	317
	318	/**
c7fc2de0	319	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	320	* @reg: memblock_region structure
5b385f25 BH	321	*/
c7fc2de0	322	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	323	{
c7fc2de0	324	return PFN_UP(reg->base);
5b385f25 BH	325	}
	326
	327	/**
c7fc2de0	328	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	329	* @reg: memblock_region structure
5b385f25 BH	330	*/
c7fc2de0	331	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	332	{
c7fc2de0	333	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	334	}
	335
	336	/**
c7fc2de0	337	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	338	* @reg: memblock_region structure
5b385f25 BH	339	*/
c7fc2de0	340	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	341	{
c7fc2de0	342	return PFN_DOWN(reg->base);
5b385f25 BH	343	}
	344
	345	/**
c7fc2de0	346	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	347	* @reg: memblock_region structure
5b385f25 BH	348	*/
c7fc2de0	349	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	350	{
c7fc2de0	351	return PFN_UP(reg->base + reg->size);
5b385f25 BH	352	}
	353
	354	#define for_each_memblock(memblock_type, region) \
	355	for (region = memblock.memblock_type.regions; \
	356	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	357	region++)
	358
	359
c378ddd5	360	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
67e24bcb TH	361	#define __init_memblock __meminit
67e24bcb TH	362	#define __initdata_memblock __meminitdata
10d06439 YL	363	#else
	364	#define __init_memblock
	365	#define __initdata_memblock
	366	#endif
	367
4a20799d	368	#ifdef CONFIG_MEMTEST
7f70baee	369	extern void early_memtest(phys_addr_t start, phys_addr_t end);
4a20799d	370	#else
7f70baee	371	static inline void early_memtest(phys_addr_t start, phys_addr_t end)
4a20799d VM	372	{
	373	}
	374	#endif
	375
95dde501 YL	376	#else
	377	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	378	{
1f5026a7	379	return 0;
95dde501 YL	380	}
95dde501 YL	381
f0b37fad YL	382	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	383
95f72d1e YL	384	#endif /* __KERNEL__ */
	385
	386	#endif /* _LINUX_MEMBLOCK_H */