bootmem.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:5k
- /*
- * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
- */
- #ifndef _LINUX_BOOTMEM_H
- #define _LINUX_BOOTMEM_H
- #include <asm/pgtable.h>
- #include <asm/dma.h>
- #include <linux/cache.h>
- #include <linux/init.h>
- #include <linux/mmzone.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 */
- } bootmem_data_t;
- extern unsigned long __init bootmem_bootmap_pages (unsigned long);
- extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
- extern void __init free_bootmem (unsigned long addr, unsigned long size);
- extern void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
- #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
- extern void __init 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((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((x), PAGE_SIZE, 0)
- #define alloc_bootmem_limit(x, limit)
- __alloc_bootmem_limit((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
- #define alloc_bootmem_low_limit(x, limit)
- __alloc_bootmem_limit((x), SMP_CACHE_BYTES, 0, (limit))
- #define alloc_bootmem_pages_limit(x, limit)
- __alloc_bootmem_limit((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
- #define alloc_bootmem_low_pages_limit(x, limit)
- __alloc_bootmem_limit((x), PAGE_SIZE, 0, (limit))
- #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
- extern unsigned long __init free_all_bootmem (void);
- extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
- extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
- extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
- extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
- extern void * __init __alloc_bootmem_node_limit (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
- #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_node((pgdat), (x), PAGE_SIZE, 0)
- #define alloc_bootmem_node_limit(pgdat, x, limit)
- __alloc_bootmem_node_limit((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
- #define alloc_bootmem_pages_node_limit(pgdat, x, limit)
- __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
- #define alloc_bootmem_low_pages_node_limit(pgdat, x, limit)
- __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, 0, (limit))
- #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
- extern unsigned long __initdata nr_kernel_pages;
- extern unsigned long __initdata nr_all_pages;
- extern void *__init 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_HIGHMEM 0x00000001 /* Consider highmem? */
- #define HASH_EARLY 0x00000002 /* Allocating during early boot? */
- /* Only NUMA needs hash distribution.
- * IA64 is known to have sufficient vmalloc space.
- */
- #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
- #define HASHDIST_DEFAULT 1
- #else
- #define HASHDIST_DEFAULT 0
- #endif
- extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
- static inline void *__alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal)
- {
- return __alloc_bootmem_limit(size, align, goal, 0);
- }
- static inline void *__alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align,
- unsigned long goal)
- {
- return __alloc_bootmem_node_limit(pgdat, size, align, goal, 0);
- }
- #endif /* _LINUX_BOOTMEM_H */