281dd25cdc
This introduces a limit parameter to the core bootmem allocator; The new parameter indicates that physical memory allocated by the bootmem allocator should be within the requested limit. We also introduce alloc_bootmem_low_pages_limit, alloc_bootmem_node_limit, alloc_bootmem_low_pages_node_limit apis, but alloc_bootmem_low_pages_limit is the only api used for swiotlb. The existing alloc_bootmem_low_pages() api could instead have been changed and made to pass right limit to the core allocator. But that would make the patch more intrusive for 2.6.14, as other arches use alloc_bootmem_low_pages(). We may be done that post 2.6.14 as a cleanup. With this, swiotlb gets memory within 4G for both x86_64 and ia64 arches. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Ravikiran G Thirumalai <kiran@scalex86.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
137 lines
4.9 KiB
C
137 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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