[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_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);

#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.
 */
#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);
29f67386	53	phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr);
1aadc056	54	void memblock_allow_resize(void);
7fb0bc3f	55	int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid);
581adcbe TH	56	int memblock_add(phys_addr_t base, phys_addr_t size);
	57	int memblock_remove(phys_addr_t base, phys_addr_t size);
	58	int memblock_free(phys_addr_t base, phys_addr_t size);
	59	int memblock_reserve(phys_addr_t base, phys_addr_t size);
e63075a3	60
0ee332c1 TH	61	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
	62	void __next_mem_pfn_range(int idx, int nid, unsigned long out_start_pfn,
	63	unsigned long out_end_pfn, int out_nid);
	64
	65	/**
	66	* for_each_mem_pfn_range - early memory pfn range iterator
	67	* @i: an integer used as loop variable
	68	* @nid: node selector, %MAX_NUMNODES for all nodes
	69	* @p_start: ptr to ulong for start pfn of the range, can be %NULL
	70	* @p_end: ptr to ulong for end pfn of the range, can be %NULL
	71	* @p_nid: ptr to int for nid of the range, can be %NULL
	72	*
f2d52fe5	73	* Walks over configured memory ranges.
0ee332c1 TH	74	*/
	75	#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \
	76	for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
	77	i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))
	78	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	79
581adcbe TH	80	void __next_free_mem_range(u64 idx, int nid, phys_addr_t out_start,
581adcbe TH	81	phys_addr_t out_end, int out_nid);
35fd0808 TH	82
	83	/**
	84	* for_each_free_mem_range - iterate through free memblock areas
	85	* @i: u64 used as loop variable
	86	* @nid: node selector, %MAX_NUMNODES for all nodes
	87	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	88	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	89	* @p_nid: ptr to int for nid of the range, can be %NULL
	90	*
	91	* Walks over free (memory && !reserved) areas of memblock. Available as
	92	* soon as memblock is initialized.
	93	*/
	94	#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
	95	for (i = 0, \
	96	__next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
	97	i != (u64)ULLONG_MAX; \
	98	__next_free_mem_range(&i, nid, p_start, p_end, p_nid))
	99
7bd0b0f0 TH	100	void __next_free_mem_range_rev(u64 idx, int nid, phys_addr_t out_start,
	101	phys_addr_t out_end, int out_nid);
	102
	103	/**
	104	* for_each_free_mem_range_reverse - rev-iterate through free memblock areas
	105	* @i: u64 used as loop variable
	106	* @nid: node selector, %MAX_NUMNODES for all nodes
	107	* @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
	108	* @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
	109	* @p_nid: ptr to int for nid of the range, can be %NULL
	110	*
	111	* Walks over free (memory && !reserved) areas of memblock in reverse
	112	* order. Available as soon as memblock is initialized.
	113	*/
	114	#define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \
	115	for (i = (u64)ULLONG_MAX, \
	116	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \
	117	i != (u64)ULLONG_MAX; \
	118	__next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid))
	119
7c0caeb8	120	#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
581adcbe	121	int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
7c0caeb8 TH	122
	123	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	124	{
	125	r->nid = nid;
	126	}
	127
	128	static inline int memblock_get_region_node(const struct memblock_region *r)
	129	{
	130	return r->nid;
	131	}
	132	#else
	133	static inline void memblock_set_region_node(struct memblock_region *r, int nid)
	134	{
	135	}
	136
	137	static inline int memblock_get_region_node(const struct memblock_region *r)
	138	{
	139	return 0;
	140	}
	141	#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
	142
581adcbe TH	143	phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
581adcbe TH	144	phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
9d1e2492	145
581adcbe	146	phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
e63075a3 BH	147
e63075a3 BH	148	/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
2898cc4c	149	#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
e63075a3 BH	150	#define MEMBLOCK_ALLOC_ACCESSIBLE 0
e63075a3 BH	151
581adcbe TH	152	phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	153	phys_addr_t max_addr);
	154	phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
	155	phys_addr_t max_addr);
	156	phys_addr_t memblock_phys_mem_size(void);
	157	phys_addr_t memblock_start_of_DRAM(void);
	158	phys_addr_t memblock_end_of_DRAM(void);
	159	void memblock_enforce_memory_limit(phys_addr_t memory_limit);
	160	int memblock_is_memory(phys_addr_t addr);
	161	int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
	162	int memblock_is_reserved(phys_addr_t addr);
	163	int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
	164
4ff7b82f TH	165	extern void __memblock_dump_all(void);
	166
	167	static inline void memblock_dump_all(void)
	168	{
	169	if (memblock_debug)
	170	__memblock_dump_all();
	171	}
95f72d1e	172
e63075a3 BH	173	/**
	174	* memblock_set_current_limit - Set the current allocation limit to allow
	175	* limiting allocations to what is currently
	176	* accessible during boot
	177	* @limit: New limit value (physical address)
	178	*/
581adcbe	179	void memblock_set_current_limit(phys_addr_t limit);
e63075a3	180
35a1f0bd	181
5b385f25 BH	182	/*
	183	* pfn conversion functions
	184	*
	185	* While the memory MEMBLOCKs should always be page aligned, the reserved
	186	* MEMBLOCKs may not be. This accessor attempt to provide a very clear
	187	* idea of what they return for such non aligned MEMBLOCKs.
	188	*/
	189
	190	/**
c7fc2de0	191	* memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
5b385f25 BH	192	* @reg: memblock_region structure
5b385f25 BH	193	*/
c7fc2de0	194	static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
5b385f25	195	{
c7fc2de0	196	return PFN_UP(reg->base);
5b385f25 BH	197	}
	198
	199	/**
c7fc2de0	200	* memblock_region_memory_end_pfn - Return the end_pfn this region
5b385f25 BH	201	* @reg: memblock_region structure
5b385f25 BH	202	*/
c7fc2de0	203	static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
5b385f25	204	{
c7fc2de0	205	return PFN_DOWN(reg->base + reg->size);
5b385f25 BH	206	}
	207
	208	/**
c7fc2de0	209	* memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
5b385f25 BH	210	* @reg: memblock_region structure
5b385f25 BH	211	*/
c7fc2de0	212	static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
5b385f25	213	{
c7fc2de0	214	return PFN_DOWN(reg->base);
5b385f25 BH	215	}
	216
	217	/**
c7fc2de0	218	* memblock_region_reserved_end_pfn - Return the end_pfn this region
5b385f25 BH	219	* @reg: memblock_region structure
5b385f25 BH	220	*/
c7fc2de0	221	static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
5b385f25	222	{
c7fc2de0	223	return PFN_UP(reg->base + reg->size);
5b385f25 BH	224	}
	225
	226	#define for_each_memblock(memblock_type, region) \
	227	for (region = memblock.memblock_type.regions; \
	228	region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
	229	region++)
	230
	231
c378ddd5	232	#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
67e24bcb TH	233	#define __init_memblock __meminit
67e24bcb TH	234	#define __initdata_memblock __meminitdata
10d06439 YL	235	#else
	236	#define __init_memblock
	237	#define __initdata_memblock
	238	#endif
	239
95dde501 YL	240	#else
	241	static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
	242	{
1f5026a7	243	return 0;
95dde501 YL	244	}
95dde501 YL	245
f0b37fad YL	246	#endif /* CONFIG_HAVE_MEMBLOCK */
f0b37fad YL	247
95f72d1e YL	248	#endif /* __KERNEL__ */
	249
	250	#endif /* _LINUX_MEMBLOCK_H */