[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

struct memblock_region {
	phys_addr_t base;
	phys_addr_t size;
#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;
};

extern struct memblock memblock;
extern int memblock_debug;

#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 start, phys_addr_t end,
				phys_addr_t size, phys_addr_t align, 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);
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);

#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 */

void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start,
			   phys_addr_t *out_end, int *out_nid);

/**
 * for_each_free_mem_range - iterate through free memblock areas
 * @i: u64 used as loop variable
 * @nid: node selector, %MAX_NUMNODES 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 (i = 0,							\
	     __next_free_mem_range(&i, nid, p_start, p_end, p_nid);	\
	     i != (u64)ULLONG_MAX;					\
	     __next_free_mem_range(&i, nid, p_start, p_end, p_nid))

void __next_free_mem_range_rev(u64 *idx, int nid, phys_addr_t *out_start,
			       phys_addr_t *out_end, int *out_nid);

/**
 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
 * @i: u64 used as loop variable
 * @nid: node selector, %MAX_NUMNODES 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 (i = (u64)ULLONG_MAX,					\
	     __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid);	\
	     i != (u64)ULLONG_MAX;					\
	     __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))

#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
int memblock_set_node(phys_addr_t base, phys_addr_t size, 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 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 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 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);


/*
 * 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

#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
95f72d1e	21
e3239ff9	22	struct memblock_region {
2898cc4c BH	23	phys_addr_t base;
2898cc4c BH	24	phys_addr_t size;
7c0caeb8 TH	25	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	26	int nid;
	27	#endif
95f72d1e YL	28	};
95f72d1e YL	29
e3239ff9	30	struct memblock_type {
bf23c51f BH	31	unsigned long cnt; /* number of regions */
bf23c51f BH	32	unsigned long max; /* size of the allocated array */
1440c4e2	33	phys_addr_t total_size; /* size of all regions */
bf23c51f	34	struct memblock_region *regions;
95f72d1e YL	35	};
	36
	37	struct memblock {
79442ed1	38	bool bottom_up; /* is bottom up direction? */
2898cc4c	39	phys_addr_t current_limit;
e3239ff9 BH	40	struct memblock_type memory;
e3239ff9 BH	41	struct memblock_type reserved;
95f72d1e YL	42	};
	43
	44	extern struct memblock memblock;
5e63cf43	45	extern int memblock_debug;
5e63cf43 YL	46
	47	#define memblock_dbg(fmt, ...) \
	48	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
95f72d1e	49
7bd0b0f0 TH	50	phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end,
7bd0b0f0 TH	51	phys_addr_t size, phys_addr_t align, int nid);
fc769a8e TH	52	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
fc769a8e TH	53	phys_addr_t size, phys_addr_t align);
29f67386	54	phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
1aadc056	55	void memblock_allow_resize(void);
7fb0bc3f	56	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
581adcbe TH	57	int memblock_add(phys_addr_t base, phys_addr_t size);
	58	int memblock_remove(phys_addr_t base, phys_addr_t size);
	59	int memblock_free(phys_addr_t base, phys_addr_t size);
	60	int memblock_reserve(phys_addr_t base, phys_addr_t size);
6ede1fd3	61	void memblock_trim_memory(phys_addr_t align);
e63075a3	62
0ee332c1	63	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
e76b63f8 YL	64	int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
e76b63f8 YL	65	unsigned long *end_pfn);
0ee332c1 TH	66	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
	67	unsigned long out_end_pfn, int out_nid);
	68
	69	/**
	70	* for_each_mem_pfn_range - early memory pfn range iterator
	71	* @i: an integer used as loop variable
	72	* @nid: node selector, %MAX_NUMNODES for all nodes
	73	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	74	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	75	* @p_nid: ptr to int for nid of the range, can be %NULL
	76	*
f2d52fe5	77	* Walks over configured memory ranges.
0ee332c1 TH	78	*/
	79	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	80	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	81	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	82	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	83
581adcbe TH	84	void __next_free_mem_range(u64 idx, int nid, phys_addr_t out_start,
581adcbe TH	85	phys_addr_t out_end, int out_nid);
35fd0808 TH	86
	87	/**
	88	* for_each_free_mem_range - iterate through free memblock areas
	89	* @i: u64 used as loop variable
	90	* @nid: node selector, %MAX_NUMNODES for all nodes
	91	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	92	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	93	* @p_nid: ptr to int for nid of the range, can be %NULL
	94	*
	95	* Walks over free (memory && !reserved) areas of memblock. Available as
	96	* soon as memblock is initialized.
	97	*/
	98	#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
	99	for (i = 0, \
	100	__next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
	101	i != (u64)ULLONG_MAX; \
	102	__next_free_mem_range(&i, nid, p_start, p_end, p_nid))
	103
7bd0b0f0 TH	104	void __next_free_mem_range_rev(u64 idx, int nid, phys_addr_t out_start,
	105	phys_addr_t out_end, int out_nid);
	106
	107	/**
	108	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	109	* @i: u64 used as loop variable
	110	* @nid: node selector, %MAX_NUMNODES for all nodes
	111	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	112	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	113	* @p_nid: ptr to int for nid of the range, can be %NULL
	114	*
	115	* Walks over free (memory && !reserved) areas of memblock in reverse
	116	* order. Available as soon as memblock is initialized.
	117	*/
	118	#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
	119	for (i = (u64)ULLONG_MAX, \
	120	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \
	121	i != (u64)ULLONG_MAX; \
	122	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))
	123
7c0caeb8	124	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
581adcbe	125	int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
7c0caeb8 TH	126
	127	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	128	{
	129	r->nid = nid;
	130	}
	131
	132	static inline int memblock_get_region_node(const struct memblock_region *r)
	133	{
	134	return r->nid;
	135	}
	136	#else
	137	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	138	{
	139	}
	140
	141	static inline int memblock_get_region_node(const struct memblock_region *r)
	142	{
	143	return 0;
	144	}
	145	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	146
581adcbe TH	147	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
581adcbe TH	148	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	149
581adcbe	150	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3	151
79442ed1 TC	152	#ifdef CONFIG_MOVABLE_NODE
	153	/*
	154	* Set the allocation direction to bottom-up or top-down.
	155	*/
	156	static inline void memblock_set_bottom_up(bool enable)
	157	{
	158	memblock.bottom_up = enable;
	159	}
	160
	161	/*
	162	* Check if the allocation direction is bottom-up or not.
	163	* if this is true, that said, memblock will allocate memory
	164	* in bottom-up direction.
	165	*/
	166	static inline bool memblock_bottom_up(void)
	167	{
	168	return memblock.bottom_up;
	169	}
	170	#else
	171	static inline void memblock_set_bottom_up(bool enable) {}
	172	static inline bool memblock_bottom_up(void) { return false; }
	173	#endif
	174
e63075a3	175	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	176	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	177	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	178
581adcbe TH	179	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	180	phys_addr_t max_addr);
	181	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	182	phys_addr_t max_addr);
	183	phys_addr_t memblock_phys_mem_size(void);
595ad9af	184	phys_addr_t memblock_mem_size(unsigned long limit_pfn);
581adcbe TH	185	phys_addr_t memblock_start_of_DRAM(void);
	186	phys_addr_t memblock_end_of_DRAM(void);
	187	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	188	int memblock_is_memory(phys_addr_t addr);
	189	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	190	int memblock_is_reserved(phys_addr_t addr);
	191	int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
	192
4ff7b82f TH	193	extern void __memblock_dump_all(void);
	194
	195	static inline void memblock_dump_all(void)
	196	{
	197	if (memblock_debug)
	198	__memblock_dump_all();
	199	}
95f72d1e	200
e63075a3 BH	201	/**
	202	* memblock_set_current_limit - Set the current allocation limit to allow
	203	* limiting allocations to what is currently
	204	* accessible during boot
	205	* @limit: New limit value (physical address)
	206	*/
581adcbe	207	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	208
35a1f0bd	209
5b385f25 BH	210	/*
	211	* pfn conversion functions
	212	*
	213	* While the memory MEMBLOCKs should always be page aligned, the reserved
	214	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	215	* idea of what they return for such non aligned MEMBLOCKs.
	216	*/
	217
	218	/**
c7fc2de0	219	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	220	* @reg: memblock_region structure
5b385f25 BH	221	*/
c7fc2de0	222	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	223	{
c7fc2de0	224	return PFN_UP(reg->base);
5b385f25 BH	225	}
	226
	227	/**
c7fc2de0	228	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	229	* @reg: memblock_region structure
5b385f25 BH	230	*/
c7fc2de0	231	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	232	{
c7fc2de0	233	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	234	}
	235
	236	/**
c7fc2de0	237	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	238	* @reg: memblock_region structure
5b385f25 BH	239	*/
c7fc2de0	240	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	241	{
c7fc2de0	242	return PFN_DOWN(reg->base);
5b385f25 BH	243	}
	244
	245	/**
c7fc2de0	246	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	247	* @reg: memblock_region structure
5b385f25 BH	248	*/
c7fc2de0	249	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	250	{
c7fc2de0	251	return PFN_UP(reg->base + reg->size);
5b385f25 BH	252	}
	253
	254	#define for_each_memblock(memblock_type, region) \
	255	for (region = memblock.memblock_type.regions; \
	256	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	257	region++)
	258
	259
c378ddd5	260	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
67e24bcb TH	261	#define __init_memblock __meminit
67e24bcb TH	262	#define __initdata_memblock __meminitdata
10d06439 YL	263	#else
	264	#define __init_memblock
	265	#define __initdata_memblock
	266	#endif
	267
95dde501 YL	268	#else
	269	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	270	{
1f5026a7	271	return 0;
95dde501 YL	272	}
95dde501 YL	273
f0b37fad YL	274	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	275
95f72d1e YL	276	#endif /* __KERNEL__ */
	277
	278	#endif /* _LINUX_MEMBLOCK_H */