diff --git a/drivers/ieee1394/ohci1394.c b/drivers/ieee1394/ohci1394.c
index 643094c3339c346019d9c125ba5f6b76917e999d..63b71fa997fcd2d9dc13bf0c1917dc6b37936673 100644
--- a/drivers/ieee1394/ohci1394.c
+++ b/drivers/ieee1394/ohci1394.c
@@ -553,7 +553,8 @@ static void ohci_initialize(struct ti_ohci *ohci)
 	 * register content.
 	 * To actually enable physical responses is the job of our interrupt
 	 * handler which programs the physical request filter. */
-	reg_write(ohci, OHCI1394_PhyUpperBound, 0x01000000);
+	reg_write(ohci, OHCI1394_PhyUpperBound,
+		  OHCI1394_PHYS_UPPER_BOUND_PROGRAMMED >> 16);
 
 	DBGMSG("physUpperBoundOffset=%08x",
 	       reg_read(ohci, OHCI1394_PhyUpperBound));
@@ -3414,6 +3415,14 @@ static int __devinit ohci1394_pci_probe(struct pci_dev *dev,
 	host->csr.max_rec = (reg_read(ohci, OHCI1394_BusOptions) >> 12) & 0xf;
 	host->csr.lnk_spd = reg_read(ohci, OHCI1394_BusOptions) & 0x7;
 
+	if (phys_dma) {
+		host->low_addr_space =
+			(u64) reg_read(ohci, OHCI1394_PhyUpperBound) << 16;
+		if (!host->low_addr_space)
+			host->low_addr_space = OHCI1394_PHYS_UPPER_BOUND_FIXED;
+	}
+	host->middle_addr_space = OHCI1394_MIDDLE_ADDRESS_SPACE;
+
 	/* Tell the highlevel this host is ready */
 	if (hpsb_add_host(host))
 		FAIL(-ENOMEM, "Failed to register host with highlevel");
diff --git a/drivers/ieee1394/ohci1394.h b/drivers/ieee1394/ohci1394.h
index 7df0962144e344bd1c4108bb6ed4f71210ea668a..fa05f113f7f046e1363c9c19b118276a261ec6d9 100644
--- a/drivers/ieee1394/ohci1394.h
+++ b/drivers/ieee1394/ohci1394.h
@@ -443,6 +443,16 @@ static inline u32 reg_read(const struct ti_ohci *ohci, int offset)
 
 #define OHCI1394_TCODE_PHY               0xE
 
+/* Node offset map (phys DMA area, posted write area).
+ * The value of OHCI1394_PHYS_UPPER_BOUND_PROGRAMMED may be modified but must
+ * be lower than OHCI1394_MIDDLE_ADDRESS_SPACE.
+ * OHCI1394_PHYS_UPPER_BOUND_FIXED and OHCI1394_MIDDLE_ADDRESS_SPACE are
+ * constants given by the OHCI spec.
+ */
+#define OHCI1394_PHYS_UPPER_BOUND_FIXED		0x000100000000ULL /* 4 GB */
+#define OHCI1394_PHYS_UPPER_BOUND_PROGRAMMED	0x010000000000ULL /* 1 TB */
+#define OHCI1394_MIDDLE_ADDRESS_SPACE		0xffff00000000ULL
+
 void ohci1394_init_iso_tasklet(struct ohci1394_iso_tasklet *tasklet,
 			       int type,
 			       void (*func)(unsigned long),