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Rev 2089 Rev 2106
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         * Copy the kernel address space portion to new PTL0.
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         * Copy the kernel address space portion to new PTL0.
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         */
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         */
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        ipl = interrupts_disable();
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        ipl = interrupts_disable();
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        mutex_lock(&AS_KERNEL->lock);      
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        mutex_lock(&AS_KERNEL->lock);      
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        src_ptl0 = (pte_t *) PA2KA((uintptr_t) AS_KERNEL->page_table);
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        src_ptl0 = (pte_t *) PA2KA((uintptr_t) AS_KERNEL->genarch.page_table);
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        src = (uintptr_t) &src_ptl0[PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)];
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        src = (uintptr_t) &src_ptl0[PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)];
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        dst = (uintptr_t) &dst_ptl0[PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)];
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        dst = (uintptr_t) &dst_ptl0[PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)];
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        memsetb((uintptr_t) dst_ptl0, PAGE_SIZE, 0);
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        memsetb((uintptr_t) dst_ptl0, PAGE_SIZE, 0);