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Rev 1428 Rev 1468
Line 73... Line 73...
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    /** Protected by asidlock. */
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    /** Protected by asidlock. */
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    link_t inactive_as_with_asid_link;
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    link_t inactive_as_with_asid_link;
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    mutex_t lock;
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    mutex_t lock;
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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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    /** Number of processors on wich is this address space active. */
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    count_t cpu_refcount;
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    count_t cpu_refcount;
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    /** B+tree of address space areas. */
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    /** B+tree of address space areas. */
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    btree_t as_area_btree;
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    btree_t as_area_btree;
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    asid_t asid;
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    asid_t asid;
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};
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};
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struct as_operations {
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struct as_operations {
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    pte_t *(* page_table_create)(int flags);
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    pte_t *(* page_table_create)(int flags);
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    void (* page_table_destroy)(pte_t *page_table);
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    void (* page_table_lock)(as_t *as, bool lock);
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    void (* page_table_lock)(as_t *as, bool lock);
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    void (* page_table_unlock)(as_t *as, bool unlock);
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    void (* page_table_unlock)(as_t *as, bool unlock);
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};
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};
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typedef struct as_operations as_operations_t;
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typedef struct as_operations as_operations_t;
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extern spinlock_t inactive_as_with_asid_lock;
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extern spinlock_t inactive_as_with_asid_lock;
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extern link_t inactive_as_with_asid_head;
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extern link_t inactive_as_with_asid_head;
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extern void as_init(void);
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extern void as_init(void);
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extern as_t *as_create(int flags);
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extern as_t *as_create(int flags);
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extern void as_destroy(as_t *as);
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extern void as_switch(as_t *old, as_t *new);
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extern int as_page_fault(__address page, pf_access_t access, istate_t *istate);
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extern as_area_t *as_area_create(as_t *as, int flags, size_t size, __address base, int attrs,
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extern as_area_t *as_area_create(as_t *as, int flags, size_t size, __address base, int attrs,
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    mem_backend_t *backend, mem_backend_data_t *backend_data);
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    mem_backend_t *backend, mem_backend_data_t *backend_data);
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extern int as_area_destroy(as_t *as, __address address);   
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extern int as_area_resize(as_t *as, __address address, size_t size, int flags);
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extern int as_area_resize(as_t *as, __address address, size_t size, int flags);
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extern int as_area_destroy(as_t *as, __address address);
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extern int as_area_get_flags(as_area_t *area);
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extern bool as_area_check_access(as_area_t *area, pf_access_t access);
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extern int as_page_fault(__address page, pf_access_t access, istate_t *istate);
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extern void as_switch(as_t *old, as_t *new);
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extern void as_free(as_t *as);
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int as_area_share(as_t *src_as, __address src_base, size_t acc_size,
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int as_area_share(as_t *src_as, __address src_base, size_t acc_size,
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          as_t *dst_as, __address dst_base, int dst_flags_mask);
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          as_t *dst_as, __address dst_base, int dst_flags_mask);
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extern int as_area_get_flags(as_area_t *area);
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extern bool as_area_check_access(as_area_t *area, pf_access_t access);
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extern size_t as_get_size(__address base);
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extern size_t as_get_size(__address base);
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extern int used_space_insert(as_area_t *a, __address page, count_t count);
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extern int used_space_insert(as_area_t *a, __address page, count_t count);
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extern int used_space_remove(as_area_t *a, __address page, count_t count);
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extern int used_space_remove(as_area_t *a, __address page, count_t count);
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/* Interface to be implemented by architectures. */
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/* Interface to be implemented by architectures. */