[linux.git] / include / linux / bootmem.h

/*
 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
 */
#ifndef _LINUX_BOOTMEM_H
#define _LINUX_BOOTMEM_H

#include <linux/mmzone.h>
#include <asm/dma.h>

/*
 *  simple boot-time physical memory area allocator.
 */

extern unsigned long max_low_pfn;
extern unsigned long min_low_pfn;

/*
 * highest page
 */
extern unsigned long max_pfn;

#ifdef CONFIG_CRASH_DUMP
extern unsigned long saved_max_pfn;
#endif

/*
 * node_bootmem_map is a map pointer - the bits represent all physical 
 * memory pages (including holes) on the node.
 */
typedef struct bootmem_data {
	unsigned long node_min_pfn;
	unsigned long node_low_pfn;
	void *node_bootmem_map;
	unsigned long last_end_off;
	unsigned long hint_idx;
	struct list_head list;
} bootmem_data_t;

extern bootmem_data_t bootmem_node_data[];

extern unsigned long bootmem_bootmap_pages(unsigned long);

extern unsigned long init_bootmem_node(pg_data_t *pgdat,
				       unsigned long freepfn,
				       unsigned long startpfn,
				       unsigned long endpfn);
extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);

extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
extern unsigned long free_all_bootmem(void);

extern void free_bootmem_node(pg_data_t *pgdat,
			      unsigned long addr,
			      unsigned long size);
extern void free_bootmem(unsigned long addr, unsigned long size);

/*
 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
 * the architecture-specific code should honor this).
 *
 * If flags is 0, then the return value is always 0 (success). If
 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
 * memory already was reserved.
 */
#define BOOTMEM_DEFAULT		0
#define BOOTMEM_EXCLUSIVE	(1<<0)

extern int reserve_bootmem(unsigned long addr,
			   unsigned long size,
			   int flags);
extern int reserve_bootmem_node(pg_data_t *pgdat,
				unsigned long physaddr,
				unsigned long size,
				int flags);

extern void *__alloc_bootmem(unsigned long size,
			     unsigned long align,
			     unsigned long goal);
extern void *__alloc_bootmem_nopanic(unsigned long size,
				     unsigned long align,
				     unsigned long goal);
extern void *__alloc_bootmem_node(pg_data_t *pgdat,
				  unsigned long size,
				  unsigned long align,
				  unsigned long goal);
extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
				  unsigned long size,
				  unsigned long align,
				  unsigned long goal);
extern void *__alloc_bootmem_low(unsigned long size,
				 unsigned long align,
				 unsigned long goal);
extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
				      unsigned long size,
				      unsigned long align,
				      unsigned long goal);

#define alloc_bootmem(x) \
	__alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_nopanic(x) \
	__alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages(x) \
	__alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages_nopanic(x) \
	__alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_node(pgdat, x) \
	__alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages_node(pgdat, x) \
	__alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
	__alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))

#define alloc_bootmem_low(x) \
	__alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
#define alloc_bootmem_low_pages(x) \
	__alloc_bootmem_low(x, PAGE_SIZE, 0)
#define alloc_bootmem_low_pages_node(pgdat, x) \
	__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)

extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
				   int flags);

extern void *alloc_bootmem_section(unsigned long size,
				   unsigned long section_nr);

#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
extern void *alloc_remap(int nid, unsigned long size);
#else
static inline void *alloc_remap(int nid, unsigned long size)
{
	return NULL;
}
#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */

extern unsigned long __meminitdata nr_kernel_pages;
extern unsigned long __meminitdata nr_all_pages;

extern void *alloc_large_system_hash(const char *tablename,
				     unsigned long bucketsize,
				     unsigned long numentries,
				     int scale,
				     int flags,
				     unsigned int *_hash_shift,
				     unsigned int *_hash_mask,
				     unsigned long limit);

#define HASH_EARLY	0x00000001	/* Allocating during early boot? */

/* Only NUMA needs hash distribution. 64bit NUMA architectures have
 * sufficient vmalloc space.
 */
#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
#define HASHDIST_DEFAULT 1
#else
#define HASHDIST_DEFAULT 0
#endif
extern int hashdist;		/* Distribute hashes across NUMA nodes? */


#endif /* _LINUX_BOOTMEM_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
	3	*/
	4	#ifndef _LINUX_BOOTMEM_H
	5	#define _LINUX_BOOTMEM_H
	6
1da177e4	7	#include <linux/mmzone.h>
e786e86a	8	#include <asm/dma.h>
1da177e4 LT	9
	10	/*
	11	* simple boot-time physical memory area allocator.
	12	*/
	13
	14	extern unsigned long max_low_pfn;
	15	extern unsigned long min_low_pfn;
	16
	17	/*
	18	* highest page
	19	*/
	20	extern unsigned long max_pfn;
	21
92aa63a5 VG	22	#ifdef CONFIG_CRASH_DUMP
	23	extern unsigned long saved_max_pfn;
	24	#endif
	25
1da177e4 LT	26	/*
	27	* node_bootmem_map is a map pointer - the bits represent all physical
	28	* memory pages (including holes) on the node.
	29	*/
	30	typedef struct bootmem_data {
3560e249	31	unsigned long node_min_pfn;
1da177e4 LT	32	unsigned long node_low_pfn;
1da177e4 LT	33	void *node_bootmem_map;
5f2809e6 JW	34	unsigned long last_end_off;
5f2809e6 JW	35	unsigned long hint_idx;
679bc9fb	36	struct list_head list;
1da177e4 LT	37	} bootmem_data_t;
1da177e4 LT	38
b61bfa3c JW	39	extern bootmem_data_t bootmem_node_data[];
b61bfa3c JW	40
f71bf0ca	41	extern unsigned long bootmem_bootmap_pages(unsigned long);
223e8dc9 JW	42
	43	extern unsigned long init_bootmem_node(pg_data_t *pgdat,
	44	unsigned long freepfn,
	45	unsigned long startpfn,
	46	unsigned long endpfn);
f71bf0ca	47	extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
223e8dc9 JW	48
	49	extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
	50	extern unsigned long free_all_bootmem(void);
	51
	52	extern void free_bootmem_node(pg_data_t *pgdat,
	53	unsigned long addr,
	54	unsigned long size);
f71bf0ca	55	extern void free_bootmem(unsigned long addr, unsigned long size);
223e8dc9 JW	56
	57	/*
	58	* Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
	59	* the architecture-specific code should honor this).
	60	*
	61	* If flags is 0, then the return value is always 0 (success). If
	62	* flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
	63	* memory already was reserved.
	64	*/
	65	#define BOOTMEM_DEFAULT 0
	66	#define BOOTMEM_EXCLUSIVE (1<<0)
	67
c1329375 TH	68	extern int reserve_bootmem(unsigned long addr,
	69	unsigned long size,
	70	int flags);
2d0aae41 TH	71	extern int reserve_bootmem_node(pg_data_t *pgdat,
	72	unsigned long physaddr,
	73	unsigned long size,
	74	int flags);
	75
	76	extern void *__alloc_bootmem(unsigned long size,
f71bf0ca FBH	77	unsigned long align,
f71bf0ca FBH	78	unsigned long goal);
2d0aae41	79	extern void *__alloc_bootmem_nopanic(unsigned long size,
f71bf0ca FBH	80	unsigned long align,
f71bf0ca FBH	81	unsigned long goal);
223e8dc9 JW	82	extern void __alloc_bootmem_node(pg_data_t pgdat,
	83	unsigned long size,
	84	unsigned long align,
	85	unsigned long goal);
	86	extern void __alloc_bootmem_node_nopanic(pg_data_t pgdat,
	87	unsigned long size,
	88	unsigned long align,
	89	unsigned long goal);
2d0aae41 TH	90	extern void *__alloc_bootmem_low(unsigned long size,
	91	unsigned long align,
	92	unsigned long goal);
f71bf0ca FBH	93	extern void __alloc_bootmem_low_node(pg_data_t pgdat,
	94	unsigned long size,
	95	unsigned long align,
	96	unsigned long goal);
c1329375	97
1da177e4	98	#define alloc_bootmem(x) \
71fb2e8f	99	__alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
74768ed8 JB	100	#define alloc_bootmem_nopanic(x) \
74768ed8 JB	101	__alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
1da177e4	102	#define alloc_bootmem_pages(x) \
71fb2e8f	103	__alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
74768ed8 JB	104	#define alloc_bootmem_pages_nopanic(x) \
74768ed8 JB	105	__alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
1da177e4	106	#define alloc_bootmem_node(pgdat, x) \
71fb2e8f	107	__alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
1da177e4	108	#define alloc_bootmem_pages_node(pgdat, x) \
71fb2e8f	109	__alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
2d0aae41 TH	110	#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
	111	__alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
	112
	113	#define alloc_bootmem_low(x) \
	114	__alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
	115	#define alloc_bootmem_low_pages(x) \
	116	__alloc_bootmem_low(x, PAGE_SIZE, 0)
1da177e4	117	#define alloc_bootmem_low_pages_node(pgdat, x) \
71fb2e8f	118	__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
c6af5e9f JW	119
	120	extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
	121	int flags);
223e8dc9 JW	122
	123	extern void *alloc_bootmem_section(unsigned long size,
	124	unsigned long section_nr);
1da177e4	125
6f167ec7 DH	126	#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
	127	extern void *alloc_remap(int nid, unsigned long size);
	128	#else
	129	static inline void *alloc_remap(int nid, unsigned long size)
	130	{
	131	return NULL;
	132	}
f71bf0ca	133	#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
6f167ec7	134
9dec17eb	135	extern unsigned long __meminitdata nr_kernel_pages;
8da38d7b	136	extern unsigned long __meminitdata nr_all_pages;
1da177e4	137
f71bf0ca FBH	138	extern void alloc_large_system_hash(const char tablename,
	139	unsigned long bucketsize,
	140	unsigned long numentries,
	141	int scale,
	142	int flags,
	143	unsigned int *_hash_shift,
	144	unsigned int *_hash_mask,
	145	unsigned long limit);
1da177e4	146
04903664	147	#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
1da177e4	148
c2fdf3a9 AB	149	/* Only NUMA needs hash distribution. 64bit NUMA architectures have
c2fdf3a9 AB	150	* sufficient vmalloc space.
1da177e4	151	*/
c2fdf3a9	152	#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
1da177e4 LT	153	#define HASHDIST_DEFAULT 1
	154	#else
	155	#define HASHDIST_DEFAULT 0
	156	#endif
f034b5d4	157	extern int hashdist; /* Distribute hashes across NUMA nodes? */
1da177e4 LT	158
	159
	160	#endif /* _LINUX_BOOTMEM_H */