Function pmap_pinit

freebsd/mips/mips/pmap.c:1130–1156

* Initialize a preallocated and zeroed pmap structure, * such as one in a vmspace structure. */

 * such as one in a vmspace structure.
 */
int
pmap_pinit(pmap_t pmap)
{
	vm_offset_t ptdva;
	vm_page_t ptdpg;
	int i, req_class;

	/*
	 * allocate the page directory page
	 */
	req_class = VM_ALLOC_NORMAL;
	while ((ptdpg = pmap_alloc_direct_page(NUSERPGTBLS, req_class)) ==
	    NULL)
		pmap_grow_direct_page(req_class);

	ptdva = MIPS_PHYS_TO_DIRECT(VM_PAGE_TO_PHYS(ptdpg));
	pmap->pm_segtab = (pd_entry_t *)ptdva;
	CPU_ZERO(&pmap->pm_active);
	for (i = 0; i < MAXCPU; i++) {
		pmap->pm_asid[i].asid = PMAP_ASID_RESERVED;
		pmap->pm_asid[i].gen = 0;
	}
	TAILQ_INIT(&pmap->pm_pvchunk);
	bzero(&pmap->pm_stats, sizeof pmap->pm_stats);

	return (1);
}

/*
 * this routine is called if the page table page is not