Index: sys/dev/bge/if_bgereg.h
===================================================================
--- sys/dev/bge/if_bgereg.h
+++ sys/dev/bge/if_bgereg.h
@@ -3067,3 +3067,11 @@
 #define	BGE_LOCK_ASSERT(_sc)	mtx_assert(&(_sc)->bge_mtx, MA_OWNED)
 #define	BGE_UNLOCK(_sc)		mtx_unlock(&(_sc)->bge_mtx)
 #define	BGE_LOCK_DESTROY(_sc)	mtx_destroy(&(_sc)->bge_mtx)
+
+#ifdef BUS_SPACE_MAXADDR
+#if (BUS_SPACE_MAXADDR > 0xFFFFFFFF)
+#define	BGE_DMA_BOUNDARY	(0x100000000)
+#else
+#define	BGE_DMA_BOUNDARY	0
+#endif
+#endif
Index: sys/dev/pci/pcivar.h
===================================================================
--- sys/dev/pci/pcivar.h
+++ sys/dev/pci/pcivar.h
@@ -693,13 +693,7 @@
 
 void	pci_print_faulted_dev(void);
 
-#ifdef BUS_SPACE_MAXADDR
-#if (BUS_SPACE_MAXADDR > 0xFFFFFFFF)
-#define	PCI_DMA_BOUNDARY	0x100000000
-#else
 #define	PCI_DMA_BOUNDARY	0
-#endif
-#endif
 
 #endif	/* _SYS_BUS_H_ */
 
Index: sys/dev/twa/tw_osl.h
===================================================================
--- sys/dev/twa/tw_osl.h
+++ sys/dev/twa/tw_osl.h
@@ -57,6 +57,12 @@
 #define TW_OSLI_MAX_NUM_IOS		(TW_OSLI_MAX_NUM_REQUESTS - 2)
 #define TW_OSLI_MAX_NUM_AENS		0x100
 
+#ifdef PAE
+#define	TW_OSLI_DMA_BOUNDARY		(1u << 31)
+#else
+#define	TW_OSLI_DMA_BOUNDARY		((bus_size_t)((uint64_t)1 << 32))
+#endif
+
 /* Possible values of req->state. */
 #define TW_OSLI_REQ_STATE_INIT		0x0	/* being initialized */
 #define TW_OSLI_REQ_STATE_BUSY		0x1	/* submitted to CL */
Index: sys/dev/twa/tw_osl_freebsd.c
===================================================================
--- sys/dev/twa/tw_osl_freebsd.c
+++ sys/dev/twa/tw_osl_freebsd.c
@@ -549,9 +549,9 @@
 	}
 
 	/* Create the parent dma tag. */
-	if (bus_dma_tag_create(bus_get_dma_tag(sc->bus_dev), /* parent */
+	if (bus_dma_tag_create(NULL,			/* parent */
 				sc->alignment,		/* alignment */
-				0,			/* boundary */
+				TW_OSLI_DMA_BOUNDARY,	/* boundary */
 				BUS_SPACE_MAXADDR,	/* lowaddr */
 				BUS_SPACE_MAXADDR, 	/* highaddr */
 				NULL, NULL, 		/* filter, filterarg */