/* * 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_DUMPextern 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_boot_start;	unsigned long node_low_pfn;	void *node_bootmem_map;	unsigned long last_offset;	unsigned long last_pos;	unsigned long last_success;	/* Previous allocation point.  To speed					 * up searching */	struct list_head list;} bootmem_data_t; extern unsigned long bootmem_bootmap_pages(unsigned long);extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);extern void free_bootmem(unsigned long addr, unsigned long size);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_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);extern void *__alloc_bootmem_core(struct bootmem_data *bdata,				  unsigned long size,				  unsigned long align,				  unsigned long goal,				  unsigned long limit);extern void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size); #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODEextern void reserve_bootmem(unsigned long addr, unsigned long size);#define alloc_bootmem(x) \	__alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))#define alloc_bootmem_low(x) \	__alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)#define alloc_bootmem_pages(x) \	__alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))#define alloc_bootmem_low_pages(x) \	__alloc_bootmem_low(x, PAGE_SIZE, 0)#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ extern unsigned long free_all_bootmem(void);extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);extern void *__alloc_bootmem_node(pg_data_t *pgdat,				  unsigned long size,				  unsigned long align,				  unsigned long goal);extern unsigned long init_bootmem_node(pg_data_t *pgdat,				       unsigned long freepfn,				       unsigned long startpfn,				       unsigned long endpfn);extern void reserve_bootmem_node(pg_data_t *pgdat,				 unsigned long physaddr,				 unsigned long size);extern void free_bootmem_node(pg_data_t *pgdat,			      unsigned long addr,			      unsigned long size); #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE#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_low_pages_node(pgdat, x) \	__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ #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 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. * IA64 and x86_64 have sufficient vmalloc space. */#if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))#define HASHDIST_DEFAULT 1#else#define HASHDIST_DEFAULT 0#endifextern int hashdist;		/* Distribute hashes across NUMA nodes? */  #endif /* _LINUX_BOOTMEM_H */