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/**
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/**
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 * Each architecture decides what functions will be used to carry out
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 * Each architecture decides what functions will be used to carry out
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 * address space operations such as creating or locking page tables.
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 * address space operations such as creating or locking page tables.
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 */
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 */
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as_operations_t *as_operations = NULL;
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as_operations_t *as_operations = NULL;
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#endif
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/**
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/**
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 * Slab for as_t objects.
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 * Slab for as_t objects.
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 */
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 */
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static slab_cache_t *as_slab;
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static slab_cache_t *as_slab;
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#endif
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/**
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/**
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 * This lock protects inactive_as_with_asid_head list. It must be acquired
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 * This lock protects inactive_as_with_asid_head list. It must be acquired
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 * before as_t mutex.
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 * before as_t mutex.
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 */
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 */
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static as_area_t *find_area_and_lock(as_t *as, uintptr_t va);
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static as_area_t *find_area_and_lock(as_t *as, uintptr_t va);
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static bool check_area_conflicts(as_t *as, uintptr_t va, size_t size,
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static bool check_area_conflicts(as_t *as, uintptr_t va, size_t size,
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    as_area_t *avoid_area);
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    as_area_t *avoid_area);
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static void sh_info_remove_reference(share_info_t *sh_info);
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static void sh_info_remove_reference(share_info_t *sh_info);
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- 
 
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#ifndef __OBJC__
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static int as_constructor(void *obj, int flags)
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static int as_constructor(void *obj, int flags)
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{
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{
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    as_t *as = (as_t *) obj;
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    as_t *as = (as_t *) obj;
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    int rc;
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    int rc;
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{
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{
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    as_t *as = (as_t *) obj;
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    as_t *as = (as_t *) obj;
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    return as_destructor_arch(as);
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    return as_destructor_arch(as);
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}
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}
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#endif
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/** Initialize address space subsystem. */
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/** Initialize address space subsystem. */
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void as_init(void)
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void as_init(void)
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{
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{
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    as_arch_init();
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    as_arch_init();
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- 
 
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#ifndef __OBJC__
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    as_slab = slab_cache_create("as_slab", sizeof(as_t), 0,
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    as_slab = slab_cache_create("as_slab", sizeof(as_t), 0,
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        as_constructor, as_destructor, SLAB_CACHE_MAGDEFERRED);
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        as_constructor, as_destructor, SLAB_CACHE_MAGDEFERRED);
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#endif
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    AS_KERNEL = as_create(FLAG_AS_KERNEL);
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    AS_KERNEL = as_create(FLAG_AS_KERNEL);
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    if (!AS_KERNEL)
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    if (!AS_KERNEL)
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        panic("can't create kernel address space\n");
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        panic("can't create kernel address space\n");
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 */
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 */
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as_t *as_create(int flags)
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as_t *as_create(int flags)
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{
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{
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    as_t *as;
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    as_t *as;
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- 
 
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#ifdef __OBJC__
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    as = [as_t new];
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    link_initialize(&as->inactive_as_with_asid_link);
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    mutex_initialize(&as->lock);   
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    (void) as_constructor_arch(as, flags);
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#else
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    as = (as_t *) slab_alloc(as_slab, 0);
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    as = (as_t *) slab_alloc(as_slab, 0);
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#endif
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    (void) as_create_arch(as, 0);
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    (void) as_create_arch(as, 0);
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    btree_create(&as->as_area_btree);
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    btree_create(&as->as_area_btree);
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    if (flags & FLAG_AS_KERNEL)
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    if (flags & FLAG_AS_KERNEL)
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#else
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#else
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    page_table_destroy(NULL);
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    page_table_destroy(NULL);
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#endif
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#endif
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    interrupts_restore(ipl);
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    interrupts_restore(ipl);
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- 
 
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#ifdef __OBJC__
- 
 
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    [as free];
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#else
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    slab_free(as_slab, as);
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    slab_free(as_slab, as);
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#endif
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}
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}
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/** Create address space area of common attributes.
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/** Create address space area of common attributes.
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 *
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 *
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 * The created address space area is added to the target address space.
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 * The created address space area is added to the target address space.