diff --git u-boot.orig/disk/part_mac.c u-boot/disk/part_mac.c
index c1afc8c..cb443ac 100644
--- u-boot.orig/disk/part_mac.c
+++ u-boot/disk/part_mac.c
@@ -60,23 +60,23 @@ static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partitio
  */
 int test_part_mac (block_dev_desc_t *dev_desc)
 {
-	mac_driver_desc_t	ddesc;
-	mac_partition_t		mpart;
+	ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
+	ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
 	ulong i, n;
 
-	if (part_mac_read_ddb (dev_desc, &ddesc)) {
+	if (part_mac_read_ddb (dev_desc, ddesc)) {
 		/* error reading Driver Desriptor Block, or no valid Signature */
 		return (-1);
 	}
 
 	n = 1;	/* assuming at least one partition */
 	for (i=1; i<=n; ++i) {
-		if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)&mpart) != 1) ||
-		    (mpart.signature != MAC_PARTITION_MAGIC) ) {
+		if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)mpart) != 1) ||
+		    (mpart->signature != MAC_PARTITION_MAGIC) ) {
 			return (-1);
 		}
 		/* update partition count */
-		n = mpart.map_count;
+		n = mpart->map_count;
 	}
 	return (0);
 }
@@ -85,20 +85,20 @@ int test_part_mac (block_dev_desc_t *dev_desc)
 void print_part_mac (block_dev_desc_t *dev_desc)
 {
 	ulong i, n;
-	mac_driver_desc_t	ddesc;
-	mac_partition_t		mpart;
+	ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
+	ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
 	ldiv_t mb, gb;
 
-	if (part_mac_read_ddb (dev_desc, &ddesc)) {
+	if (part_mac_read_ddb (dev_desc, ddesc)) {
 		/* error reading Driver Desriptor Block, or no valid Signature */
 		return;
 	}
 
-	n  = ddesc.blk_count;
+	n  = ddesc->blk_count;
 
-	mb = ldiv(n, ((1024 * 1024) / ddesc.blk_size)); /* MB */
+	mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
 	/* round to 1 digit */
-	mb.rem *= 10 * ddesc.blk_size;
+	mb.rem *= 10 * ddesc->blk_size;
 	mb.rem += 512 * 1024;
 	mb.rem /= 1024 * 1024;
 
@@ -112,10 +112,10 @@ void print_part_mac (block_dev_desc_t *dev_desc)
 		"DeviceType=0x%x, DeviceId=0x%x\n\n"
 		"   #:                 type name"
 		"                   length   base       (size)\n",
-		ddesc.blk_size,
-		ddesc.blk_count,
+		ddesc->blk_size,
+		ddesc->blk_count,
 		mb.quot, mb.rem, gb.quot, gb.rem,
-		ddesc.dev_type, ddesc.dev_id
+		ddesc->dev_type, ddesc->dev_id
 		);
 
 	n = 1;	/* assuming at least one partition */
@@ -124,25 +124,25 @@ void print_part_mac (block_dev_desc_t *dev_desc)
 		char c;
 
 		printf ("%4ld: ", i);
-		if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)&mpart) != 1) {
+		if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)mpart) != 1) {
 			printf ("** Can't read Partition Map on %d:%ld **\n",
 				dev_desc->dev, i);
 			return;
 		}
 
-		if (mpart.signature != MAC_PARTITION_MAGIC) {
+		if (mpart->signature != MAC_PARTITION_MAGIC) {
 			printf ("** Bad Signature on %d:%ld - "
 				"expected 0x%04x, got 0x%04x\n",
-				dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart.signature);
+				dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart->signature);
 			return;
 		}
 
 		/* update partition count */
-		n = mpart.map_count;
+		n = mpart->map_count;
 
 		c      = 'k';
-		bytes  = mpart.block_count;
-		bytes /= (1024 / ddesc.blk_size);  /* kB; assumes blk_size == 512 */
+		bytes  = mpart->block_count;
+		bytes /= (1024 / ddesc->blk_size);  /* kB; assumes blk_size == 512 */
 		if (bytes >= 1024) {
 			bytes >>= 10;
 			c = 'M';
@@ -153,10 +153,10 @@ void print_part_mac (block_dev_desc_t *dev_desc)
 		}
 
 		printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
-			mpart.type,
-			mpart.name,
-			mpart.block_count,
-			mpart.start_block,
+			mpart->type,
+			mpart->name,
+			mpart->block_count,
+			mpart->start_block,
 			bytes, c
 			);
 	}
@@ -231,23 +231,23 @@ static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partitio
 
 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info)
 {
-	mac_driver_desc_t	ddesc;
-	mac_partition_t		mpart;
+	ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
+	ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
 
-	if (part_mac_read_ddb (dev_desc, &ddesc)) {
+	if (part_mac_read_ddb (dev_desc, ddesc)) {
 		return (-1);
 	}
 
-	info->blksz = ddesc.blk_size;
+	info->blksz = ddesc->blk_size;
 
-	if (part_mac_read_pdb (dev_desc, part, &mpart)) {
+	if (part_mac_read_pdb (dev_desc, part, mpart)) {
 		return (-1);
 	}
 
-	info->start = mpart.start_block;
-	info->size  = mpart.block_count;
-	memcpy (info->type, mpart.type, sizeof(info->type));
-	memcpy (info->name, mpart.name, sizeof(info->name));
+	info->start = mpart->start_block;
+	info->size  = mpart->block_count;
+	memcpy (info->type, mpart->type, sizeof(info->type));
+	memcpy (info->name, mpart->name, sizeof(info->name));
 
 	return (0);
 }
