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#ifndef KERN_AS_HT_H_
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#ifndef KERN_AS_HT_H_
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#define KERN_AS_HT_H_
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#define KERN_AS_HT_H_
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#include <mm/mm.h>
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#include <mm/mm.h>
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#include <arch/mm/asid.h>
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#include <adt/list.h>
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#include <adt/list.h>
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#include <adt/btree.h>
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#include <synch/mutex.h>
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#include <arch/types.h>
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/** Address space structure.
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 *
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 * as_t contains the list of as_areas of userspace accessible
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 * pages for one or more tasks. Ranges of kernel memory pages are not
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 * supposed to figure in the list as they are shared by all tasks and
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 * set up during system initialization.
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 */
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typedef struct {
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typedef struct {
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    /** Protected by asidlock. */
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    link_t inactive_as_with_asid_link;
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} as_genarch_t;
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    mutex_t lock;
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struct as;
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    /** Number of references (i.e tasks that reference this as). */
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    count_t refcount;
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    /** Number of processors on wich is this address space active. */
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    count_t cpu_refcount;
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    /** B+tree of address space areas. */
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    btree_t as_area_btree;
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    /** Address space identifier. Constant on architectures that do not support ASIDs.*/
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    asid_t asid;
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    /** Architecture specific content. */
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    as_arch_t arch;
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} as_t;
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typedef struct {
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typedef struct pte {
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    link_t link;        /**< Page hash table link. */
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    link_t link;        /**< Page hash table link. */
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    as_t *as;       /**< Address space. */
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    struct as *as;      /**< Address space. */
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    uintptr_t page;     /**< Virtual memory page. */
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    uintptr_t page;     /**< Virtual memory page. */
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    uintptr_t frame;    /**< Physical memory frame. */
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    uintptr_t frame;    /**< Physical memory frame. */
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    unsigned g : 1;     /**< Global page. */
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    unsigned g : 1;     /**< Global page. */
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    unsigned x : 1;     /**< Execute. */
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    unsigned x : 1;     /**< Execute. */
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    unsigned w : 1;     /**< Writable. */
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    unsigned w : 1;     /**< Writable. */