forked from KolibriOS/kolibrios
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
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typedef struct
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{
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link_t buddy_link; /**< link to the next free block inside one order */
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count_t refcount; /**< tracking of shared frames */
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u32_t buddy_order; /**< buddy system block order */
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void *parent; /**< If allocated by slab, this points there */
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} frame_t;
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typedef struct {
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SPINLOCK_DECLARE(lock); /**< this lock protects everything below */
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pfn_t base; /**< frame_no of the first frame in the frames array */
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count_t count; /**< Size of zone */
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frame_t *frames; /**< array of frame_t structures in this zone */
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count_t free_count; /**< number of free frame_t structures */
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count_t busy_count; /**< number of busy frame_t structures */
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u32_t max_order;
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link_t order[21];
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int flags;
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} zone_t;
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# define PA2KA(x) (((u32_t) (x)) + OS_BASE)
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# define KA2PA(x) (((u32_t) (x)) - OS_BASE)
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#define PAGE_SIZE 4096
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#define FRAME_WIDTH 12
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#define BUDDY_SYSTEM_INNER_BLOCK 0xff
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static inline count_t SIZE2FRAMES(size_t size)
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{
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if (!size)
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return 0;
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return (count_t) ((size - 1) >> FRAME_WIDTH) + 1;
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}
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static inline addr_t PFN2ADDR(pfn_t frame)
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{
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return (addr_t) (frame << FRAME_WIDTH);
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}
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static inline pfn_t ADDR2PFN(addr_t addr)
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{
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return (pfn_t) (addr >> FRAME_WIDTH);
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};
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void init_mm();
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pfn_t core_alloc(u32_t order);
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pfn_t alloc_page() __attribute__ ((deprecated));
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pfn_t __stdcall alloc_pages(count_t count) __asm__ ("_alloc_pages") __attribute__ ((deprecated));
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void core_free(pfn_t frame);
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void frame_free(pfn_t frame);
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