/* * 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; #ifndef CONFIG_NO_BOOTMEM/* * 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[];#endif 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_low_memory_core_early(int nodeid);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);extern void free_bootmem_late(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);void *__alloc_bootmem_node_high(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);void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,				  unsigned long size,				  unsigned long align,				  unsigned long goal,				  unsigned long limit);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); #ifdef CONFIG_NO_BOOTMEM/* We are using top down, so it is safe to use 0 here */#define BOOTMEM_LOW_LIMIT 0#else#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)#endif #define alloc_bootmem(x) \	__alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_align(x, align) \	__alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_nopanic(x) \	__alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_pages(x) \	__alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_pages_nopanic(x) \	__alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_node(pgdat, x) \	__alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_node_nopanic(pgdat, x) \	__alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_pages_node(pgdat, x) \	__alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)#define alloc_bootmem_pages_node_nopanic(pgdat, x) \	__alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT) #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); #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAPextern void *alloc_remap(int nid, unsigned long size);#elsestatic inline void *alloc_remap(int nid, unsigned long size){	return NULL;}#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */ 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 low_limit,				     unsigned long high_limit); #define HASH_EARLY	0x00000001	/* Allocating during early boot? */#define HASH_SMALL	0x00000002	/* sub-page allocation allowed, min					 * shift passed via *_hash_shift */ /* 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#endifextern int hashdist;		/* Distribute hashes across NUMA nodes? */  #endif /* _LINUX_BOOTMEM_H */