diff options
Diffstat (limited to 'include/linux/bootmem.h')
| -rw-r--r-- | include/linux/bootmem.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h new file mode 100644 index 000000000000..0dd8ca1a3d5a --- /dev/null +++ b/include/linux/bootmem.h @@ -0,0 +1,96 @@ +/* + * 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; + +/* + * 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 (unsigned long size, unsigned long align, unsigned long goal); +#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) +#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 (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal); +#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) +#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ + +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? */ + + +#endif /* _LINUX_BOOTMEM_H */ |