>>>>> On Fri, 15 Feb 2002 13:08:20 +0100 (MET), "Maciej W. Rozycki" <macro@ds2.pg.gda.pl> said: macro> IOW, two consecutive writes separated by a "sync" need not macro> imply a write-back, but as soon as a read happens a preceding macro> write-back is a must. TX39 satisfy this on uncached load/store. "sync" does not flush a write buffer, but any uncached load are executed AFTER completion of pending uncached store. On combination of cached and uncached operation, TX39 does not satisfy this order. macro> It sounds weird: it looks like "sync" is useless and basically macro> a "nop". TX39 has a function called "non-blocking load". This function is described on chapter 4.4 of TX39/H2 manual. "sync" operation is meaningful with this function. macro> If this is the case the processors need their own wbflush() macro> implementation. Can you point to specific chapters of macro> specifications that document it? Chapter 4.9.4 in TX39/H2 Japanese manual describes write buffer. But I could not find it in the English manual... --- Atsushi Nemoto
