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	*/			*/
	static vm_page_t			static vm_page_t
	mmu_booke_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va,			mmu_booke_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va,
	vm_prot_t prot)			vm_prot_t prot)
	{			{
	pte_t *pte;			pte_t *pte;
	vm_page_t m;			vm_page_t m;
	uint32_t pte_wbit;			uint32_t pte_wbit;
	vm_paddr_t pa;

	m = NULL;			m = NULL;
	pa = 0;
	PMAP_LOCK(pmap);			PMAP_LOCK(pmap);
	retry:
	pte = pte_find(mmu, pmap, va);			pte = pte_find(mmu, pmap, va);
	if ((pte != NULL) && PTE_ISVALID(pte)) {			if ((pte != NULL) && PTE_ISVALID(pte)) {
	if (pmap == kernel_pmap)			if (pmap == kernel_pmap)
	pte_wbit = PTE_SW;			pte_wbit = PTE_SW;
	else			else
	pte_wbit = PTE_UW;			pte_wbit = PTE_UW;

	if ((*pte & pte_wbit) \|\| ((prot & VM_PROT_WRITE) == 0)) {			if ((*pte & pte_wbit) != 0 \|\| (prot & VM_PROT_WRITE) == 0) {
	if (vm_page_pa_tryrelock(pmap, PTE_PA(pte), &pa))
	goto retry;
	m = PHYS_TO_VM_PAGE(PTE_PA(pte));			m = PHYS_TO_VM_PAGE(PTE_PA(pte));
	vm_page_wire(m);			if (!vm_page_wire_mapped(m))
				m = NULL;
	}			}
	}			}

	PA_UNLOCK_COND(pa);
	PMAP_UNLOCK(pmap);			PMAP_UNLOCK(pmap);
	return (m);			return (m);
	}			}

	/*			/*
	* Initialize a vm_page's machine-dependent fields.			* Initialize a vm_page's machine-dependent fields.
	*/			*/
	static void			static void
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