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#define AS_AREA_READ    1
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#define AS_AREA_READ    1
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#define AS_AREA_WRITE   2
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#define AS_AREA_WRITE   2
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#define AS_AREA_EXEC    4
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#define AS_AREA_EXEC    4
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#define AS_AREA_DEVICE  8
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#define AS_AREA_DEVICE  8
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 - 
 
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#ifdef KERNEL
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#ifdef KERNEL
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#include <arch/mm/page.h>
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#include <arch/mm/page.h>
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#include <arch/mm/as.h>
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#include <arch/mm/as.h>
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#include <arch/mm/asid.h>
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#include <arch/mm/asid.h>
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    mutex_t lock;
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    mutex_t lock;
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    int flags;      /**< Flags related to the memory represented by the address space area. */
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    int flags;      /**< Flags related to the memory represented by the address space area. */
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    int attributes;     /**< Attributes related to the address space area itself. */
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    int attributes;     /**< Attributes related to the address space area itself. */
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    count_t pages;      /**< Size of this area in multiples of PAGE_SIZE. */
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    count_t pages;      /**< Size of this area in multiples of PAGE_SIZE. */
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    __address base;     /**< Base address of this area. */
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    __address base;     /**< Base address of this area. */
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    btree_t used_space; /**< Map of used space. */
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};
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};
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/** Address space structure.
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/** Address space structure.
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 *
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 *
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 * as_t contains the list of as_areas of userspace accessible
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 * as_t contains the list of as_areas of userspace accessible