diff options
Diffstat (limited to 'kernel/include/linux/bootmem.h')
| -rw-r--r-- | kernel/include/linux/bootmem.h | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/kernel/include/linux/bootmem.h b/kernel/include/linux/bootmem.h new file mode 100644 index 000000000..0995c2de8 --- /dev/null +++ b/kernel/include/linux/bootmem.h @@ -0,0 +1,368 @@ +/* + * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999 + */ +#ifndef _LINUX_BOOTMEM_H +#define _LINUX_BOOTMEM_H + +#include <linux/mmzone.h> +#include <linux/mm_types.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_all_bootmem(void); +extern void reset_node_managed_pages(pg_data_t *pgdat); +extern void reset_all_zones_managed_pages(void); + +extern void free_bootmem_node(pg_data_t *pgdat, + unsigned long addr, + unsigned long size); +extern void free_bootmem(unsigned long physaddr, unsigned long size); +extern void free_bootmem_late(unsigned long physaddr, unsigned long size); + +/* + * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE, + * the architecture-specific code should honor this). + * + * If flags is BOOTMEM_DEFAULT, 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); +void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat, + unsigned long size, + unsigned long align, + unsigned long goal, + unsigned long limit); +extern void *__alloc_bootmem_low(unsigned long size, + unsigned long align, + unsigned long goal); +void *__alloc_bootmem_low_nopanic(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_nopanic(x) \ + __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 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) + + +#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) + +/* FIXME: use MEMBLOCK_ALLOC_* variants here */ +#define BOOTMEM_ALLOC_ACCESSIBLE 0 +#define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0) + +/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */ +void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size, + phys_addr_t align, phys_addr_t min_addr, + phys_addr_t max_addr, int nid); +void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align, + phys_addr_t min_addr, phys_addr_t max_addr, int nid); +void __memblock_free_early(phys_addr_t base, phys_addr_t size); +void __memblock_free_late(phys_addr_t base, phys_addr_t size); + +static inline void * __init memblock_virt_alloc( + phys_addr_t size, phys_addr_t align) +{ + return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT, + BOOTMEM_ALLOC_ACCESSIBLE, + NUMA_NO_NODE); +} + +static inline void * __init memblock_virt_alloc_nopanic( + phys_addr_t size, phys_addr_t align) +{ + return memblock_virt_alloc_try_nid_nopanic(size, align, + BOOTMEM_LOW_LIMIT, + BOOTMEM_ALLOC_ACCESSIBLE, + NUMA_NO_NODE); +} + +#ifndef ARCH_LOW_ADDRESS_LIMIT +#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL +#endif + +static inline void * __init memblock_virt_alloc_low( + phys_addr_t size, phys_addr_t align) +{ + return memblock_virt_alloc_try_nid(size, align, + BOOTMEM_LOW_LIMIT, + ARCH_LOW_ADDRESS_LIMIT, + NUMA_NO_NODE); +} +static inline void * __init memblock_virt_alloc_low_nopanic( + phys_addr_t size, phys_addr_t align) +{ + return memblock_virt_alloc_try_nid_nopanic(size, align, + BOOTMEM_LOW_LIMIT, + ARCH_LOW_ADDRESS_LIMIT, + NUMA_NO_NODE); +} + +static inline void * __init memblock_virt_alloc_from_nopanic( + phys_addr_t size, phys_addr_t align, phys_addr_t min_addr) +{ + return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr, + BOOTMEM_ALLOC_ACCESSIBLE, + NUMA_NO_NODE); +} + +static inline void * __init memblock_virt_alloc_node( + phys_addr_t size, int nid) +{ + return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT, + BOOTMEM_ALLOC_ACCESSIBLE, nid); +} + +static inline void * __init memblock_virt_alloc_node_nopanic( + phys_addr_t size, int nid) +{ + return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT, + BOOTMEM_ALLOC_ACCESSIBLE, + nid); +} + +static inline void __init memblock_free_early( + phys_addr_t base, phys_addr_t size) +{ + __memblock_free_early(base, size); +} + +static inline void __init memblock_free_early_nid( + phys_addr_t base, phys_addr_t size, int nid) +{ + __memblock_free_early(base, size); +} + +static inline void __init memblock_free_late( + phys_addr_t base, phys_addr_t size) +{ + __memblock_free_late(base, size); +} + +#else + +#define BOOTMEM_ALLOC_ACCESSIBLE 0 + + +/* Fall back to all the existing bootmem APIs */ +static inline void * __init memblock_virt_alloc( + phys_addr_t size, phys_addr_t align) +{ + if (!align) + align = SMP_CACHE_BYTES; + return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT); +} + +static inline void * __init memblock_virt_alloc_nopanic( + phys_addr_t size, phys_addr_t align) +{ + if (!align) + align = SMP_CACHE_BYTES; + return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT); +} + +static inline void * __init memblock_virt_alloc_low( + phys_addr_t size, phys_addr_t align) +{ + if (!align) + align = SMP_CACHE_BYTES; + return __alloc_bootmem_low(size, align, 0); +} + +static inline void * __init memblock_virt_alloc_low_nopanic( + phys_addr_t size, phys_addr_t align) +{ + if (!align) + align = SMP_CACHE_BYTES; + return __alloc_bootmem_low_nopanic(size, align, 0); +} + +static inline void * __init memblock_virt_alloc_from_nopanic( + phys_addr_t size, phys_addr_t align, phys_addr_t min_addr) +{ + return __alloc_bootmem_nopanic(size, align, min_addr); +} + +static inline void * __init memblock_virt_alloc_node( + phys_addr_t size, int nid) +{ + return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES, + BOOTMEM_LOW_LIMIT); +} + +static inline void * __init memblock_virt_alloc_node_nopanic( + phys_addr_t size, int nid) +{ + return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size, + SMP_CACHE_BYTES, + BOOTMEM_LOW_LIMIT); +} + +static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size, + phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid) +{ + return __alloc_bootmem_node_high(NODE_DATA(nid), size, align, + min_addr); +} + +static inline void * __init memblock_virt_alloc_try_nid_nopanic( + phys_addr_t size, phys_addr_t align, + phys_addr_t min_addr, phys_addr_t max_addr, int nid) +{ + return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align, + min_addr, max_addr); +} + +static inline void __init memblock_free_early( + phys_addr_t base, phys_addr_t size) +{ + free_bootmem(base, size); +} + +static inline void __init memblock_free_early_nid( + phys_addr_t base, phys_addr_t size, int nid) +{ + free_bootmem_node(NODE_DATA(nid), base, size); +} + +static inline void __init memblock_free_late( + phys_addr_t base, phys_addr_t size) +{ + free_bootmem_late(base, size); +} +#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */ + +#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 low_limit, + unsigned long high_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 */ |