cregit-Linux how code gets into the kernel

Release 4.7 include/linux/bootmem.h

Directory: include/linux
/*
 * 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;
/*
 * highest possible page
 */
extern unsigned long long max_possible_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) __malloc;
extern void *__alloc_bootmem_node(pg_data_t *pgdat,
				  unsigned long size,
				  unsigned long align,
				  unsigned long goal) __malloc;
void *__alloc_bootmem_node_high(pg_data_t *pgdat,
				  unsigned long size,
				  unsigned long align,
				  unsigned long goal) __malloc;
extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
				  unsigned long size,
				  unsigned long align,
				  unsigned long goal) __malloc;
void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
				  unsigned long size,
				  unsigned long align,
				  unsigned long goal,
				  unsigned long limit) __malloc;
extern void *__alloc_bootmem_low(unsigned long size,
				 unsigned long align,
				 unsigned long goal) __malloc;
void *__alloc_bootmem_low_nopanic(unsigned long size,
				 unsigned long align,
				 unsigned long goal) __malloc;
extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
				      unsigned long size,
				      unsigned long align,
				      unsigned long goal) __malloc;

#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); }

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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); }

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#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); }

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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); }

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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); }

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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); }

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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); }

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static inline void __init memblock_free_early( phys_addr_t base, phys_addr_t size) { __memblock_free_early(base, size); }

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static inline void __init memblock_free_early_nid( phys_addr_t base, phys_addr_t size, int nid) { __memblock_free_early(base, size); }

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static inline void __init memblock_free_late( phys_addr_t base, phys_addr_t size) { __memblock_free_late(base, size); }

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#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); }

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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); }

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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); }

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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); }

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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); }

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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); }

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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); }

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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); }

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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); }

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static inline void __init memblock_free_early( phys_addr_t base, phys_addr_t size) { free_bootmem(base, size); }

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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); }

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static inline void __init memblock_free_late( phys_addr_t base, phys_addr_t size) { free_bootmem_late(base, size); }

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#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; }

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#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. */ #ifdef CONFIG_NUMA #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT) extern int hashdist; /* Distribute hashes across NUMA nodes? */ #else #define hashdist (0) #endif #endif /* _LINUX_BOOTMEM_H */

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yinghai luyinghai lu24116.91%816.33%
pre-gitpre-git1399.75%612.24%
johannes weinerjohannes weiner835.82%48.16%
rasmus villemoesrasmus villemoes694.84%24.08%
dave hansendave hansen382.67%12.04%
tejun heotejun heo372.60%24.08%
david howellsdavid howells342.39%12.04%
ravikiran g thirumalairavikiran g thirumalai261.82%12.04%
jan beulichjan beulich191.33%24.08%
brent casavantbrent casavant181.26%12.04%
andi kleenandi kleen161.12%24.08%
bernhard wallebernhard walle120.84%12.04%
fujita tomonorifujita tomonori120.84%12.04%
suresh siddhasuresh siddha90.63%12.04%
tang chentang chen90.63%12.04%
franck bui-huufranck bui-huu80.56%36.12%
igor mammedovigor mammedov70.49%12.04%
jiang liujiang liu70.49%12.04%
linus torvaldslinus torvalds60.42%12.04%
tim birdtim bird50.35%12.04%
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andrew mortonandrew morton40.28%24.08%
yasunori gotoyasunori goto30.21%12.04%
joonsoo kimjoonsoo kim20.14%12.04%
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anton blanchardanton blanchard10.07%12.04%
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Directory: include/linux
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