diff --git a/board/amcc/katmai/katmai.c b/board/amcc/katmai/katmai.c
index 669b828..39a3ef1 100644
--- a/board/amcc/katmai/katmai.c
+++ b/board/amcc/katmai/katmai.c
@@ -217,10 +217,9 @@
 	mtdcr (uic0sr, 0x00000000);	/* clear all interrupts*/
 	mtdcr (uic0sr, 0xffffffff);	/* clear all interrupts*/
 
-/* SDR0_MFR should be part of Ethernet init */
-	mfsdr (sdr_mfr, mfr);
-	mfr &= ~SDR0_MFR_ECS_MASK;
-/*	mtsdr(sdr_mfr, mfr); */
+	mfsdr(sdr_mfr, mfr);
+	mfr |= SDR0_MFR_FIXD;		/* Workaround for PCI/DMA */
+	mtsdr(sdr_mfr, mfr);
 
 	mtsdr(SDR0_PFC0, CFG_PFC0);
 
diff --git a/board/amcc/luan/luan.c b/board/amcc/luan/luan.c
index 0067ce0..f964511 100644
--- a/board/amcc/luan/luan.c
+++ b/board/amcc/luan/luan.c
@@ -39,6 +39,8 @@
  ************************************************************************/
 int board_early_init_f(void)
 {
+	u32 mfr;
+
 	mtebc( pb0ap,  0x03800000 );	/* set chip selects */
 	mtebc( pb0cr,  0xffc58000 );	/* ebc0_b0cr, 4MB at 0xffc00000 CS0 */
 	mtebc( pb1ap,  0x03800000 );
@@ -64,6 +66,10 @@
 	mtdcr( uic0sr, 0x00000000 );	/* clear all interrupts */
 	mtdcr( uic0sr, 0xffffffff );
 
+	mfsdr(sdr_mfr, mfr);
+	mfr |= SDR0_MFR_FIXD;		/* Workaround for PCI/DMA */
+	mtsdr(sdr_mfr, mfr);
+
 	return  0;
 }
 
diff --git a/board/amcc/yucca/yucca.c b/board/amcc/yucca/yucca.c
index 17aaa26..52486cc 100644
--- a/board/amcc/yucca/yucca.c
+++ b/board/amcc/yucca/yucca.c
@@ -529,10 +529,10 @@
 	mtdcr (uic0sr, 0x00000000);	/* clear all interrupts */
 	mtdcr (uic0sr, 0xffffffff);	/* clear all interrupts */
 
-	/* SDR0_MFR should be part of Ethernet init */
-	mfsdr (sdr_mfr, mfr);
-	mfr &= ~SDR0_MFR_ECS_MASK;
-	/*mtsdr(sdr_mfr, mfr);*/
+	mfsdr(sdr_mfr, mfr);
+	mfr |= SDR0_MFR_FIXD;		/* Workaround for PCI/DMA */
+	mtsdr(sdr_mfr, mfr);
+
 	fpga_init();
 
 	return 0;
diff --git a/include/ppc440.h b/include/ppc440.h
index dfa3d2a..21e8836 100644
--- a/include/ppc440.h
+++ b/include/ppc440.h
@@ -813,6 +813,8 @@
 #define SDRAM_BXCF_M_BE_MASK		0x00000001	/* Memory Bank Enable	*/
 #define SDRAM_BXCF_M_BE_DISABLE		0x00000000	/* Memory Bank Enable	*/
 #define SDRAM_BXCF_M_BE_ENABLE		0x00000001	/* Memory Bank Enable	*/
+
+#define SDR0_MFR_FIXD			0x10000000	/* Workaround for PCI/DMA */
 #endif /* CONFIG_440SPE */
 
 /*-----------------------------------------------------------------------------