pmap_page_cache
pmap_page_cache(mdpg, false);
pmap_page_cache(mdpg, true);
void pmap_page_cache(struct pmap *, paddr_t, int);
pmap_page_cache(pmap, pa, 0);
pmap_page_cache(pmap, VM_PAGE_TO_PHYS(pg), 1);
void pmap_page_cache(struct vm_page_md *, bool);