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Rev 3492 | Rev 3742 | ||
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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) |
149 | 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 | * |
158 | * |
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 | * |
772 | * @param as Address space. |
776 | * @param as Address space. |
773 | * @param flags Flags of the area memory. |
777 | * @param flags Flags of the area memory. |
774 | * @param address Address withing the area to be changed. |
778 | * @param address Address within the area to be changed. |
775 | * |
779 | * |
776 | * @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); |