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37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
#ifndef __ALLOC_PAGE_H__
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#define __ALLOC_PAGE_H__
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#include <memcache/memcache.h>
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/* List member to keep track of free and unused physical pages.
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* Has PAGE_SIZE granularity */
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struct page_area {
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struct list_head list;
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unsigned int used; /* Used or free */
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unsigned int pfn; /* Base pfn */
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unsigned int numpages; /* Number of pages this region covers */
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struct mem_cache *cache;/* The cache used when freeing the page area for
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* quickly finding where the area is stored. */
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};
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struct page_allocator {
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/* Keep track of page area lists and allocated caches for page areas. */
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struct list_head page_area_list;
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/* Caches of page areas that refer to any kind of data */
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struct list_head dcache_list;
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/* Caches of page areas that refer to cache pages */
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struct list_head ccache_list;
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/* A spare cache to aid when both caches are full */
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struct mem_cache *spare;
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};
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/* Initialises the page allocator */
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void init_page_allocator(unsigned long start, unsigned long end);
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/* Page allocation functions */
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void *alloc_page(int quantity);
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void *zalloc_page(int quantity);
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int free_page(void *paddr);
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#endif /* __ALLOC_PAGE_H__ */
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