PG_ROOT_NENTRIES
#define PMAP_ROOT_SIZE (sizeof(pte_t****) * PG_ROOT_NENTRIES)
for (; i < PG_ROOT_NENTRIES; i++, j = 0, k = 0, l = 0) {
round_page(PG_ROOT_NENTRIES * sizeof(pte_t ***));
data_end += round_page(PG_ROOT_NENTRIES * sizeof(pte_t ***));
bzero(pmap->pm_root, sizeof(pte_t **) * PG_ROOT_NENTRIES);
for (int i = 0; i < PG_ROOT_NENTRIES; i++)