138 lines
4.9 KiB
C
138 lines
4.9 KiB
C
/*
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* Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
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*/
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#ifndef _LINUX_BOOTMEM_H
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#define _LINUX_BOOTMEM_H
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#include <asm/pgtable.h>
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#include <asm/dma.h>
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#include <linux/cache.h>
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#include <linux/init.h>
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#include <linux/mmzone.h>
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/*
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* simple boot-time physical memory area allocator.
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*/
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extern unsigned long max_low_pfn;
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extern unsigned long min_low_pfn;
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/*
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* highest page
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*/
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extern unsigned long max_pfn;
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#ifdef CONFIG_CRASH_DUMP
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extern unsigned long saved_max_pfn;
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#endif
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/*
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* node_bootmem_map is a map pointer - the bits represent all physical
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* memory pages (including holes) on the node.
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*/
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typedef struct bootmem_data {
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unsigned long node_boot_start;
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unsigned long node_low_pfn;
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void *node_bootmem_map;
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unsigned long last_offset;
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unsigned long last_pos;
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unsigned long last_success; /* Previous allocation point. To speed
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* up searching */
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} bootmem_data_t;
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extern unsigned long __init bootmem_bootmap_pages (unsigned long);
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extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
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extern void __init free_bootmem (unsigned long addr, unsigned long size);
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extern void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
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#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
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extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
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#define alloc_bootmem(x) \
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__alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low(x) \
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__alloc_bootmem((x), SMP_CACHE_BYTES, 0)
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#define alloc_bootmem_pages(x) \
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__alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low_pages(x) \
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__alloc_bootmem((x), PAGE_SIZE, 0)
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#define alloc_bootmem_limit(x, limit) \
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__alloc_bootmem_limit((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
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#define alloc_bootmem_low_limit(x, limit) \
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__alloc_bootmem_limit((x), SMP_CACHE_BYTES, 0, (limit))
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#define alloc_bootmem_pages_limit(x, limit) \
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__alloc_bootmem_limit((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
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#define alloc_bootmem_low_pages_limit(x, limit) \
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__alloc_bootmem_limit((x), PAGE_SIZE, 0, (limit))
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#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
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extern unsigned long __init free_all_bootmem (void);
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extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
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extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
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extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
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extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
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extern void * __init __alloc_bootmem_node_limit (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
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#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
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#define alloc_bootmem_node(pgdat, x) \
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__alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_pages_node(pgdat, x) \
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__alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low_pages_node(pgdat, x) \
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__alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
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#define alloc_bootmem_node_limit(pgdat, x, limit) \
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__alloc_bootmem_node_limit((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
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#define alloc_bootmem_pages_node_limit(pgdat, x, limit) \
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__alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
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#define alloc_bootmem_low_pages_node_limit(pgdat, x, limit) \
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__alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, 0, (limit))
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#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
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#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
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extern void *alloc_remap(int nid, unsigned long size);
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#else
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static inline void *alloc_remap(int nid, unsigned long size)
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{
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return NULL;
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}
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#endif
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extern unsigned long __initdata nr_kernel_pages;
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extern unsigned long __initdata nr_all_pages;
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extern void *__init alloc_large_system_hash(const char *tablename,
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unsigned long bucketsize,
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unsigned long numentries,
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int scale,
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int flags,
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unsigned int *_hash_shift,
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unsigned int *_hash_mask,
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unsigned long limit);
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#define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
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#define HASH_EARLY 0x00000002 /* Allocating during early boot? */
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/* Only NUMA needs hash distribution.
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* IA64 is known to have sufficient vmalloc space.
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*/
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#if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
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#define HASHDIST_DEFAULT 1
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#else
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#define HASHDIST_DEFAULT 0
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#endif
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extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
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static inline void *__alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal)
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{
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return __alloc_bootmem_limit(size, align, goal, 0);
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}
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static inline void *__alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align,
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unsigned long goal)
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{
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return __alloc_bootmem_node_limit(pgdat, size, align, goal, 0);
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}
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#endif /* _LINUX_BOOTMEM_H */
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