Function pmap_copy_page

freebsd/amd64/amd64/pmap.c:7797–7804

* Copy 1 specified hardware page to another. */

 * Copy 1 specified hardware page to another.
 */
void
pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
{
	vm_offset_t src = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(msrc));
	vm_offset_t dst = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(mdst));

	pagecopy((void *)src, (void *)dst);
}

int unmapped_buf_allowed = 1;