[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

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 {
	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);
int memblock_free_reserved_regions(void);
int memblock_reserve_reserved_regions(void);

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);

#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
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.  Available after early_node_map is
 * populated.
 */
#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);

/* 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_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 {
2898cc4c	38	phys_addr_t current_limit;
e3239ff9 BH	39	struct memblock_type memory;
e3239ff9 BH	40	struct memblock_type reserved;
95f72d1e YL	41	};
	42
	43	extern struct memblock memblock;
5e63cf43	44	extern int memblock_debug;
5e63cf43 YL	45
	46	#define memblock_dbg(fmt, ...) \
	47	if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
95f72d1e	48
7bd0b0f0 TH	49	phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end,
7bd0b0f0 TH	50	phys_addr_t size, phys_addr_t align, int nid);
fc769a8e TH	51	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
fc769a8e TH	52	phys_addr_t size, phys_addr_t align);
7950c407 YL	53	int memblock_free_reserved_regions(void);
7950c407 YL	54	int memblock_reserve_reserved_regions(void);
5303b68f	55
1aadc056	56	void memblock_allow_resize(void);
7fb0bc3f	57	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
581adcbe TH	58	int memblock_add(phys_addr_t base, phys_addr_t size);
	59	int memblock_remove(phys_addr_t base, phys_addr_t size);
	60	int memblock_free(phys_addr_t base, phys_addr_t size);
	61	int memblock_reserve(phys_addr_t base, phys_addr_t size);
e63075a3	62
0ee332c1 TH	63	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	64	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
	65	unsigned long out_end_pfn, int out_nid);
	66
	67	/**
	68	* for_each_mem_pfn_range - early memory pfn range iterator
	69	* @i: an integer used as loop variable
	70	* @nid: node selector, %MAX_NUMNODES for all nodes
	71	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	72	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	73	* @p_nid: ptr to int for nid of the range, can be %NULL
	74	*
	75	* Walks over configured memory ranges. Available after early_node_map is
	76	* populated.
	77	*/
	78	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	79	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	80	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	81	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	82
581adcbe TH	83	void __next_free_mem_range(u64 idx, int nid, phys_addr_t out_start,
581adcbe TH	84	phys_addr_t out_end, int out_nid);
35fd0808 TH	85
	86	/**
	87	* for_each_free_mem_range - iterate through free memblock areas
	88	* @i: u64 used as loop variable
	89	* @nid: node selector, %MAX_NUMNODES for all nodes
	90	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	91	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	92	* @p_nid: ptr to int for nid of the range, can be %NULL
	93	*
	94	* Walks over free (memory && !reserved) areas of memblock. Available as
	95	* soon as memblock is initialized.
	96	*/
	97	#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
	98	for (i = 0, \
	99	__next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
	100	i != (u64)ULLONG_MAX; \
	101	__next_free_mem_range(&i, nid, p_start, p_end, p_nid))
	102
7bd0b0f0 TH	103	void __next_free_mem_range_rev(u64 idx, int nid, phys_addr_t out_start,
	104	phys_addr_t out_end, int out_nid);
	105
	106	/**
	107	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	108	* @i: u64 used as loop variable
	109	* @nid: node selector, %MAX_NUMNODES for all nodes
	110	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	111	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	112	* @p_nid: ptr to int for nid of the range, can be %NULL
	113	*
	114	* Walks over free (memory && !reserved) areas of memblock in reverse
	115	* order. Available as soon as memblock is initialized.
	116	*/
	117	#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
	118	for (i = (u64)ULLONG_MAX, \
	119	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \
	120	i != (u64)ULLONG_MAX; \
	121	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))
	122
7c0caeb8	123	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
581adcbe	124	int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
7c0caeb8 TH	125
	126	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	127	{
	128	r->nid = nid;
	129	}
	130
	131	static inline int memblock_get_region_node(const struct memblock_region *r)
	132	{
	133	return r->nid;
	134	}
	135	#else
	136	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	137	{
	138	}
	139
	140	static inline int memblock_get_region_node(const struct memblock_region *r)
	141	{
	142	return 0;
	143	}
	144	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	145
581adcbe TH	146	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
581adcbe TH	147	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	148
581adcbe	149	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3 BH	150
e63075a3 BH	151	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	152	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	153	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	154
581adcbe TH	155	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	156	phys_addr_t max_addr);
	157	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	158	phys_addr_t max_addr);
	159	phys_addr_t memblock_phys_mem_size(void);
	160	phys_addr_t memblock_start_of_DRAM(void);
	161	phys_addr_t memblock_end_of_DRAM(void);
	162	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	163	int memblock_is_memory(phys_addr_t addr);
	164	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	165	int memblock_is_reserved(phys_addr_t addr);
	166	int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
	167
4ff7b82f TH	168	extern void __memblock_dump_all(void);
	169
	170	static inline void memblock_dump_all(void)
	171	{
	172	if (memblock_debug)
	173	__memblock_dump_all();
	174	}
95f72d1e	175
e63075a3 BH	176	/**
	177	* memblock_set_current_limit - Set the current allocation limit to allow
	178	* limiting allocations to what is currently
	179	* accessible during boot
	180	* @limit: New limit value (physical address)
	181	*/
581adcbe	182	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	183
35a1f0bd	184
5b385f25 BH	185	/*
	186	* pfn conversion functions
	187	*
	188	* While the memory MEMBLOCKs should always be page aligned, the reserved
	189	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	190	* idea of what they return for such non aligned MEMBLOCKs.
	191	*/
	192
	193	/**
c7fc2de0	194	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	195	* @reg: memblock_region structure
5b385f25 BH	196	*/
c7fc2de0	197	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	198	{
c7fc2de0	199	return PFN_UP(reg->base);
5b385f25 BH	200	}
	201
	202	/**
c7fc2de0	203	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	204	* @reg: memblock_region structure
5b385f25 BH	205	*/
c7fc2de0	206	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	207	{
c7fc2de0	208	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	209	}
	210
	211	/**
c7fc2de0	212	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	213	* @reg: memblock_region structure
5b385f25 BH	214	*/
c7fc2de0	215	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	216	{
c7fc2de0	217	return PFN_DOWN(reg->base);
5b385f25 BH	218	}
	219
	220	/**
c7fc2de0	221	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	222	* @reg: memblock_region structure
5b385f25 BH	223	*/
c7fc2de0	224	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	225	{
c7fc2de0	226	return PFN_UP(reg->base + reg->size);
5b385f25 BH	227	}
	228
	229	#define for_each_memblock(memblock_type, region) \
	230	for (region = memblock.memblock_type.regions; \
	231	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	232	region++)
	233
	234
c378ddd5	235	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
67e24bcb TH	236	#define __init_memblock __meminit
67e24bcb TH	237	#define __initdata_memblock __meminitdata
10d06439 YL	238	#else
	239	#define __init_memblock
	240	#define __initdata_memblock
	241	#endif
	242
95dde501 YL	243	#else
	244	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	245	{
1f5026a7	246	return 0;
95dde501 YL	247	}
95dde501 YL	248
f0b37fad YL	249	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	250
95f72d1e YL	251	#endif /* __KERNEL__ */
	252
	253	#endif /* _LINUX_MEMBLOCK_H */