[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 {
	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(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(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 __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))

#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 */

/* The numa aware allocator is only available if
 * CONFIG_ARCH_POPULATES_NODE_MAP is set
 */
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_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
fc769a8e TH	49	phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
fc769a8e TH	50	phys_addr_t size, phys_addr_t align);
7950c407 YL	51	int memblock_free_reserved_regions(void);
7950c407 YL	52	int memblock_reserve_reserved_regions(void);
5303b68f	53
1aadc056	54	void memblock_allow_resize(void);
581adcbe TH	55	int memblock_add(phys_addr_t base, phys_addr_t size);
	56	int memblock_remove(phys_addr_t base, phys_addr_t size);
	57	int memblock_free(phys_addr_t base, phys_addr_t size);
	58	int memblock_reserve(phys_addr_t base, phys_addr_t size);
e63075a3	59
581adcbe TH	60	void __next_free_mem_range(u64 idx, int nid, phys_addr_t out_start,
581adcbe TH	61	phys_addr_t out_end, int out_nid);
35fd0808 TH	62
	63	/**
	64	* for_each_free_mem_range - iterate through free memblock areas
	65	* @i: u64 used as loop variable
	66	* @nid: node selector, %MAX_NUMNODES for all nodes
	67	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	68	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	69	* @p_nid: ptr to int for nid of the range, can be %NULL
	70	*
	71	* Walks over free (memory && !reserved) areas of memblock. Available as
	72	* soon as memblock is initialized.
	73	*/
	74	#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
	75	for (i = 0, \
	76	__next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
	77	i != (u64)ULLONG_MAX; \
	78	__next_free_mem_range(&i, nid, p_start, p_end, p_nid))
	79
7c0caeb8	80	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
581adcbe	81	int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
7c0caeb8 TH	82
	83	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	84	{
	85	r->nid = nid;
	86	}
	87
	88	static inline int memblock_get_region_node(const struct memblock_region *r)
	89	{
	90	return r->nid;
	91	}
	92	#else
	93	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	94	{
	95	}
	96
	97	static inline int memblock_get_region_node(const struct memblock_region *r)
	98	{
	99	return 0;
	100	}
	101	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	102
c196f76f BH	103	/* The numa aware allocator is only available if
	104	* CONFIG_ARCH_POPULATES_NODE_MAP is set
	105	*/
581adcbe TH	106	phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end,
	107	phys_addr_t size, phys_addr_t align, int nid);
	108	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
	109	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	110
581adcbe	111	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3 BH	112
e63075a3 BH	113	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	114	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	115	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	116
581adcbe TH	117	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	118	phys_addr_t max_addr);
	119	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	120	phys_addr_t max_addr);
	121	phys_addr_t memblock_phys_mem_size(void);
	122	phys_addr_t memblock_start_of_DRAM(void);
	123	phys_addr_t memblock_end_of_DRAM(void);
	124	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	125	int memblock_is_memory(phys_addr_t addr);
	126	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	127	int memblock_is_reserved(phys_addr_t addr);
	128	int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
	129
4ff7b82f TH	130	extern void __memblock_dump_all(void);
	131
	132	static inline void memblock_dump_all(void)
	133	{
	134	if (memblock_debug)
	135	__memblock_dump_all();
	136	}
95f72d1e	137
e63075a3 BH	138	/**
	139	* memblock_set_current_limit - Set the current allocation limit to allow
	140	* limiting allocations to what is currently
	141	* accessible during boot
	142	* @limit: New limit value (physical address)
	143	*/
581adcbe	144	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	145
35a1f0bd	146
5b385f25 BH	147	/*
	148	* pfn conversion functions
	149	*
	150	* While the memory MEMBLOCKs should always be page aligned, the reserved
	151	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	152	* idea of what they return for such non aligned MEMBLOCKs.
	153	*/
	154
	155	/**
c7fc2de0	156	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	157	* @reg: memblock_region structure
5b385f25 BH	158	*/
c7fc2de0	159	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	160	{
c7fc2de0	161	return PFN_UP(reg->base);
5b385f25 BH	162	}
	163
	164	/**
c7fc2de0	165	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	166	* @reg: memblock_region structure
5b385f25 BH	167	*/
c7fc2de0	168	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	169	{
c7fc2de0	170	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	171	}
	172
	173	/**
c7fc2de0	174	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	175	* @reg: memblock_region structure
5b385f25 BH	176	*/
c7fc2de0	177	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	178	{
c7fc2de0	179	return PFN_DOWN(reg->base);
5b385f25 BH	180	}
	181
	182	/**
c7fc2de0	183	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	184	* @reg: memblock_region structure
5b385f25 BH	185	*/
c7fc2de0	186	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	187	{
c7fc2de0	188	return PFN_UP(reg->base + reg->size);
5b385f25 BH	189	}
	190
	191	#define for_each_memblock(memblock_type, region) \
	192	for (region = memblock.memblock_type.regions; \
	193	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	194	region++)
	195
	196
c378ddd5	197	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
67e24bcb TH	198	#define __init_memblock __meminit
67e24bcb TH	199	#define __initdata_memblock __meminitdata
10d06439 YL	200	#else
	201	#define __init_memblock
	202	#define __initdata_memblock
	203	#endif
	204
95dde501 YL	205	#else
	206	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	207	{
1f5026a7	208	return 0;
95dde501 YL	209	}
95dde501 YL	210
f0b37fad YL	211	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	212
95f72d1e YL	213	#endif /* __KERNEL__ */
	214
	215	#endif /* _LINUX_MEMBLOCK_H */