root/include/linux/bootmem.h

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DEFINITIONS

This source file includes following definitions.
  1. memblock_virt_alloc
  2. memblock_virt_alloc_nopanic
  3. memblock_virt_alloc_low
  4. memblock_virt_alloc_low_nopanic
  5. memblock_virt_alloc_from_nopanic
  6. memblock_virt_alloc_node
  7. memblock_virt_alloc_node_nopanic
  8. memblock_free_early
  9. memblock_free_early_nid
  10. memblock_free_late
  11. memblock_virt_alloc
  12. memblock_virt_alloc_nopanic
  13. memblock_virt_alloc_low
  14. memblock_virt_alloc_low_nopanic
  15. memblock_virt_alloc_from_nopanic
  16. memblock_virt_alloc_node
  17. memblock_virt_alloc_node_nopanic
  18. memblock_virt_alloc_try_nid
  19. memblock_virt_alloc_try_nid_nopanic
  20. memblock_free_early
  21. memblock_free_early_nid
  22. memblock_free_late
  23. alloc_remap
/*
 * 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 */
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