diff options
Diffstat (limited to 'include/linux/bootmem.h')
| -rw-r--r-- | include/linux/bootmem.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h new file mode 100644 index 00000000..ab344a52 --- /dev/null +++ b/include/linux/bootmem.h @@ -0,0 +1,174 @@ +/* + * 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); + +unsigned long free_all_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 */ |