+;;; The comments in some of the cmucl source read that "the i and d
+;;; caches are unified, and so there is no need to flush them."
+;;;
+;;; Other bits of the cmucl source say that this is not true for
+;;; "newer machines, such as the SuperSPARC and MicroSPARC based
+;;; ones". Welcome to the 21st century... -- CSR, 2002-05-06