Function pmap_update_pde_invalidate

freebsd/i386/i386/pmap.c:1188–1201

* After changing the page size for the specified virtual address in the page * table, flush the corresponding entries from the processor's TLB. Only the * calling processor's TLB is affected. * * The calling thread must be pinned to a processor. */

 * The calling thread must be pinned to a processor.
 */
static void
pmap_update_pde_invalidate(vm_offset_t va, pd_entry_t newpde)
{

	if ((newpde & PG_PS) == 0)
		/* Demotion: flush a specific 2MB page mapping. */
		invlpg(va);
	else /* if ((newpde & PG_G) == 0) */
		/*
		 * Promotion: flush every 4KB page mapping from the TLB
		 * because there are too many to flush individually.
		 */
		invltlb();
}

#ifdef SMP