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Rev 3492 Rev 3742
Line 144... Line 144...
144 
    as_slab = slab_cache_create("as_slab", sizeof(as_t), 0,
 144 
    as_slab = slab_cache_create("as_slab", sizeof(as_t), 0,
145 
        as_constructor, as_destructor, SLAB_CACHE_MAGDEFERRED);
 145 
        as_constructor, as_destructor, SLAB_CACHE_MAGDEFERRED);
146 
   
 146 
   
147 
    AS_KERNEL = as_create(FLAG_AS_KERNEL);
 147 
    AS_KERNEL = as_create(FLAG_AS_KERNEL);
148 
    if (!AS_KERNEL)
 148 
    if (!AS_KERNEL)
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        panic("can't create kernel address space\n");
 149 
        panic("Cannot create kernel address space\n");
150 
   
 150 
   
- 
 
 151 
    /* Make sure the kernel address space
- 
 
 152 
     * reference count never drops to zero.
- 
 
 153 
     */
- 
 
 154 
    atomic_set(&AS_KERNEL->refcount, 1);
151 
}
 155 
}
152 
 
 156 
 
153 
/** Create address space.
 157 
/** Create address space.
154 
 *
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 *
155 
 * @param flags     Flags that influence the way in wich the address space
 159 
 * @param flags     Flags that influence the way in wich the address space
Line 769... Line 773...
769 
 * In order for this to work properly, this may copy the data
 773 
 * In order for this to work properly, this may copy the data
770 
 * into private anonymous memory (unless it's already there).
 774 
 * into private anonymous memory (unless it's already there).
771 
 *
 775 
 *
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 * @param as        Address space.
 776 
 * @param as      Address space.
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 * @param flags     Flags of the area memory.
 777 
 * @param flags   Flags of the area memory.
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 * @param address   Address withing the area to be changed.
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 * @param address Address within the area to be changed.
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 *
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 *
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 * @return      Zero on success or a value from @ref errno.h on failure.
 780 
 * @return Zero on success or a value from @ref errno.h on failure.
- 
 
 781 
 *
777 
 */
 782 
 */
778 
int as_area_change_flags(as_t *as, int flags, uintptr_t address)
 783 
int as_area_change_flags(as_t *as, int flags, uintptr_t address)
779 
{
 784 
{
780 
    as_area_t *area;
 785 
    as_area_t *area;
781 
    uintptr_t base;
 786 
    uintptr_t base;
Line 797... Line 802...
797 
        mutex_unlock(&as->lock);
 802 
        mutex_unlock(&as->lock);
798 
        interrupts_restore(ipl);
 803 
        interrupts_restore(ipl);
799 
        return ENOENT;
 804 
        return ENOENT;
800 
    }
 805 
    }
801 
 
 806 
 
802 
    if (area->sh_info || area->backend != &anon_backend) {
 807 
    if ((area->sh_info) || (area->backend != &anon_backend)) {
803 
        /* Copying shared areas not supported yet */
 808 
        /* Copying shared areas not supported yet */
804 
        /* Copying non-anonymous memory not supported yet */
 809 
        /* Copying non-anonymous memory not supported yet */
805 
        mutex_unlock(&area->lock);
 810 
        mutex_unlock(&area->lock);
806 
        mutex_unlock(&as->lock);
 811 
        mutex_unlock(&as->lock);
807 
        interrupts_restore(ipl);
 812 
        interrupts_restore(ipl);
Line 868... Line 873...
868 
    /*
 873 
    /*
869 
     * Finish TLB shootdown sequence.
 874 
     * Finish TLB shootdown sequence.
870 
     */
 875 
     */
871 
 
 876 
 
872 
    tlb_invalidate_pages(as->asid, area->base, area->pages);
 877 
    tlb_invalidate_pages(as->asid, area->base, area->pages);
- 
 
 878 
   
873 
    /*
 879 
    /*
874 
     * Invalidate potential software translation caches (e.g. TSB on
 880 
     * Invalidate potential software translation caches (e.g. TSB on
875 
     * sparc64).
 881 
     * sparc64).
876 
     */
 882 
     */
877 
    as_invalidate_translation_cache(as, area->base, area->pages);
 883 
    as_invalidate_translation_cache(as, area->base, area->pages);