/* * 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_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_NODE extern 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_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. * 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 #endif extern int hashdist; /* Distribute hashes across NUMA nodes? */ #endif /* _LINUX_BOOTMEM_H */