from issue 53: don't set TOM2 if 4G less mem installed, opt for init_ecc

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2144 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/cpu/amd/mtrr/amd_mtrr.c

@@ -149,10 +149,12 @@ void amd_setup_mtrrs(void)
 	msr.lo = state.mmio_basek << 10;
 	wrmsr(TOP_MEM, msr);
 
-	/* Setup TOP_MEM2 */
-	msr.hi = state.tomk >> 22;
-	msr.lo = state.tomk << 10;
-	wrmsr(TOP_MEM2, msr);
+	if(state.tomk>(4*1024*1024)) {
+		/* Setup TOP_MEM2 */
+		msr.hi = state.tomk >> 22;
+		msr.lo = state.tomk << 10;
+		wrmsr(TOP_MEM2, msr);
+	}
 
 	/* zero the IORR's before we enable to prevent
 	 * undefined side effects.