/* * 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); 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); 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 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? */ #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 #endif extern int hashdist; /* Distribute hashes across NUMA nodes? */ #endif /* _LINUX_BOOTMEM_H */