diff --git a/arch/ppc64/kernel/pSeries_iommu.c b/arch/ppc64/kernel/pSeries_iommu.c
index 7f7947c3e12f8a66502c2467c74b89194c2a98a1..2b5e622732f4e4b4234ec69cffffdd8d23cb83e5 100644
--- a/arch/ppc64/kernel/pSeries_iommu.c
+++ b/arch/ppc64/kernel/pSeries_iommu.c
@@ -60,6 +60,9 @@ static void tce_build_pSeries(struct iommu_table *tbl, long index,
 	union tce_entry t;
 	union tce_entry *tp;
 
+	index <<= TCE_PAGE_FACTOR;
+	npages <<= TCE_PAGE_FACTOR;
+
 	t.te_word = 0;
 	t.te_rdwr = 1; // Read allowed 
 
@@ -70,11 +73,11 @@ static void tce_build_pSeries(struct iommu_table *tbl, long index,
 
 	while (npages--) {
 		/* can't move this out since we might cross LMB boundary */
-		t.te_rpn = (virt_to_abs(uaddr)) >> PAGE_SHIFT;
+		t.te_rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT;
 	
 		tp->te_word = t.te_word;
 
-		uaddr += PAGE_SIZE;
+		uaddr += TCE_PAGE_SIZE;
 		tp++;
 	}
 }
@@ -85,6 +88,9 @@ static void tce_free_pSeries(struct iommu_table *tbl, long index, long npages)
 	union tce_entry t;
 	union tce_entry *tp;
 
+	npages <<= TCE_PAGE_FACTOR;
+	index <<= TCE_PAGE_FACTOR;
+
 	t.te_word = 0;
 	tp  = ((union tce_entry *)tbl->it_base) + index;
 		
@@ -104,7 +110,7 @@ static void tce_build_pSeriesLP(struct iommu_table *tbl, long tcenum,
 	union tce_entry tce;
 
 	tce.te_word = 0;
-	tce.te_rpn = (virt_to_abs(uaddr)) >> PAGE_SHIFT;
+	tce.te_rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT;
 	tce.te_rdwr = 1;
 	if (direction != DMA_TO_DEVICE)
 		tce.te_pciwr = 1;
@@ -137,6 +143,9 @@ static void tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
 	union tce_entry tce, *tcep;
 	long l, limit;
 
+	tcenum <<= TCE_PAGE_FACTOR;
+	npages <<= TCE_PAGE_FACTOR;
+
 	if (npages == 1)
 		return tce_build_pSeriesLP(tbl, tcenum, npages, uaddr,
 					   direction);
@@ -156,7 +165,7 @@ static void tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
 	}
 
 	tce.te_word = 0;
-	tce.te_rpn = (virt_to_abs(uaddr)) >> PAGE_SHIFT;
+	tce.te_rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT;
 	tce.te_rdwr = 1;
 	if (direction != DMA_TO_DEVICE)
 		tce.te_pciwr = 1;
@@ -167,7 +176,7 @@ static void tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
 		 * Set up the page with TCE data, looping through and setting
 		 * the values.
 		 */
-		limit = min_t(long, npages, PAGE_SIZE/sizeof(union tce_entry));
+		limit = min_t(long, npages, 4096/sizeof(union tce_entry));
 
 		for (l = 0; l < limit; l++) {
 			tcep[l] = tce;
@@ -197,6 +206,9 @@ static void tce_free_pSeriesLP(struct iommu_table *tbl, long tcenum, long npages
 	u64 rc;
 	union tce_entry tce;
 
+	tcenum <<= TCE_PAGE_FACTOR;
+	npages <<= TCE_PAGE_FACTOR;
+
 	tce.te_word = 0;
 
 	while (npages--) {
@@ -222,6 +234,9 @@ static void tce_freemulti_pSeriesLP(struct iommu_table *tbl, long tcenum, long n
 	u64 rc;
 	union tce_entry tce;
 
+	tcenum <<= TCE_PAGE_FACTOR;
+	npages <<= TCE_PAGE_FACTOR;
+
 	tce.te_word = 0;
 
 	rc = plpar_tce_stuff((u64)tbl->it_index,
diff --git a/arch/ppc64/kernel/u3_iommu.c b/arch/ppc64/kernel/u3_iommu.c
index 115cbdf3b13b79d39ecd33c9d3bc688297e6ac70..df9c775f495568f0c6df62ab0e02f2bfffa8b733 100644
--- a/arch/ppc64/kernel/u3_iommu.c
+++ b/arch/ppc64/kernel/u3_iommu.c
@@ -125,18 +125,21 @@ static void dart_build(struct iommu_table *tbl, long index,
 
 	DBG("dart: build at: %lx, %lx, addr: %x\n", index, npages, uaddr);
 
+	index <<= DART_PAGE_FACTOR;
+	npages <<= DART_PAGE_FACTOR;
+
 	dp = ((unsigned int*)tbl->it_base) + index;
 	
 	/* On U3, all memory is contigous, so we can move this
 	 * out of the loop.
 	 */
 	while (npages--) {
-		rpn = virt_to_abs(uaddr) >> PAGE_SHIFT;
+		rpn = virt_to_abs(uaddr) >> DART_PAGE_SHIFT;
 
 		*(dp++) = DARTMAP_VALID | (rpn & DARTMAP_RPNMASK);
 
 		rpn++;
-		uaddr += PAGE_SIZE;
+		uaddr += DART_PAGE_SIZE;
 	}
 
 	dart_dirty = 1;
@@ -154,6 +157,9 @@ static void dart_free(struct iommu_table *tbl, long index, long npages)
 
 	DBG("dart: free at: %lx, %lx\n", index, npages);
 
+	index <<= DART_PAGE_FACTOR;
+	npages <<= DART_PAGE_FACTOR;
+
 	dp  = ((unsigned int *)tbl->it_base) + index;
 		
 	while (npages--)
@@ -182,10 +188,10 @@ static int dart_init(struct device_node *dart_node)
 	 * that to work around what looks like a problem with the HT bridge
 	 * prefetching into invalid pages and corrupting data
 	 */
-	tmp = lmb_alloc(PAGE_SIZE, PAGE_SIZE);
+	tmp = lmb_alloc(DART_PAGE_SIZE, DART_PAGE_SIZE);
 	if (!tmp)
 		panic("U3-DART: Cannot allocate spare page!");
-	dart_emptyval = DARTMAP_VALID | ((tmp >> PAGE_SHIFT) & DARTMAP_RPNMASK);
+	dart_emptyval = DARTMAP_VALID | ((tmp >> DART_PAGE_SHIFT) & DARTMAP_RPNMASK);
 
 	/* Map in DART registers. FIXME: Use device node to get base address */
 	dart = ioremap(DART_BASE, 0x7000);
@@ -196,8 +202,8 @@ static int dart_init(struct device_node *dart_node)
 	 * table size and enable bit
 	 */
 	regword = DARTCNTL_ENABLE | 
-		((dart_tablebase >> PAGE_SHIFT) << DARTCNTL_BASE_SHIFT) |
-		(((dart_tablesize >> PAGE_SHIFT) & DARTCNTL_SIZE_MASK)
+		((dart_tablebase >> DART_PAGE_SHIFT) << DARTCNTL_BASE_SHIFT) |
+		(((dart_tablesize >> DART_PAGE_SHIFT) & DARTCNTL_SIZE_MASK)
 				 << DARTCNTL_SIZE_SHIFT);
 	dart_vbase = ioremap(virt_to_abs(dart_tablebase), dart_tablesize);
 
diff --git a/include/asm-ppc64/dart.h b/include/asm-ppc64/dart.h
index 306799a31a5db19876c238ce9488a7a49d637faa..a9000de8a2e3832f1c262bff3193d6add132258b 100644
--- a/include/asm-ppc64/dart.h
+++ b/include/asm-ppc64/dart.h
@@ -51,5 +51,9 @@
 #define DARTMAP_RPNMASK 0x00ffffff
 
 
+#define DART_SHIFT		12
+#define DART_PAGE_SIZE		(1 << DART_SHIFT)
+#define DART_PAGE_FACTOR	(PAGE_SHIFT - DART_SHIFT)
+
 
 #endif
diff --git a/include/asm-ppc64/tce.h b/include/asm-ppc64/tce.h
index 636504c62c8870fbf2f4ad34194975a17f2be20a..d40b6b42ab359900bd417e8ad818fb3ce83da003 100644
--- a/include/asm-ppc64/tce.h
+++ b/include/asm-ppc64/tce.h
@@ -28,6 +28,13 @@
 #define TCE_VB  0
 #define TCE_PCI 1
 
+/* TCE page size is 4096 bytes (1 << 12) */
+
+#define TCE_SHIFT	12
+#define TCE_PAGE_SIZE	(1 << TCE_SHIFT)
+#define TCE_PAGE_FACTOR	(PAGE_SHIFT - TCE_SHIFT)
+
+
 /* tce_entry
  * Used by pSeries (SMP) and iSeries/pSeries LPAR, but there it's
  * abstracted so layout is irrelevant.