diff --git a/include/asm-mips/ip32/mace.h b/include/asm-mips/ip32/mace.h
index 5bdc51d85b6c2d5f7d792ee63b76624116daa085..e514efe44c0670ac149eaebcd034ee1a0dde1020 100644
--- a/include/asm-mips/ip32/mace.h
+++ b/include/asm-mips/ip32/mace.h
@@ -150,24 +150,34 @@ struct mace_audio {
 
 /* register definitions for parallel port DMA */
 struct mace_parport {
-/* 0 - do nothing, 1 - pulse terminal count to the device after buffer is drained */ 
-#define MACEPAR_CONTEXT_LASTFLAG BIT(63)
-/* Should not cross 4K page boundary */
-#define MACEPAR_CONTEXT_DATALEN_MASK 0xfff00000000
-/* Can be arbitrarily aligned on any byte boundary on output, 64 byte aligned on input */
-#define MACEPAR_CONTEXT_BASEADDR_MASK 0xffffffff
+	/* 0 - do nothing,
+	 * 1 - pulse terminal count to the device after buffer is drained */
+#define MACEPAR_CONTEXT_LASTFLAG	BIT(63)
+	/* Should not cross 4K page boundary */
+#define MACEPAR_CONTEXT_DATA_BOUND	0x0000000000001000UL
+#define MACEPAR_CONTEXT_DATALEN_MASK	0x00000fff00000000UL
+#define MACEPAR_CONTEXT_DATALEN_SHIFT	32
+	/* Can be arbitrarily aligned on any byte boundary on output,
+	 * 64 byte aligned on input */
+#define MACEPAR_CONTEXT_BASEADDR_MASK	0x00000000ffffffffUL
 	volatile u64 context_a;
 	volatile u64 context_b;
-#define MACEPAR_CTLSTAT_DIRECTION BIT(0) /* 0 - mem->device, 1 - device->mem */
-#define MACEPAR_CTLSTAT_ENABLE BIT(1) /* 0 - channel frozen, 1 - channel enabled */
-#define MACEPAR_CTLSTAT_RESET BIT(2) /* 0 - channel active, 1 - complete channel reset */
-#define MACEPAR_CTLSTAT_CTXB_VALID BIT(3)
-#define MACEPAR_CTLSTAT_CTXA_VALID BIT(4)
-	volatile u64 cntlstat; /* Control/Status register */
-#define MACEPAR_DIAG_CTXINUSE BIT(1)
-#define MACEPAR_DIAG_DMACTIVE BIT(2) /* 1 - Dma engine is enabled and processing something */
-#define MACEPAR_DIAG_CTRMASK 0x3ffc /* Counter of bytes left */
-	volatile u64 diagnostic; /* RO: diagnostic register */
+	/* 0 - mem->device, 1 - device->mem */
+#define MACEPAR_CTLSTAT_DIRECTION	BIT(0)
+	/* 0 - channel frozen, 1 - channel enabled */
+#define MACEPAR_CTLSTAT_ENABLE		BIT(1)
+	/* 0 - channel active, 1 - complete channel reset */
+#define MACEPAR_CTLSTAT_RESET		BIT(2)
+#define MACEPAR_CTLSTAT_CTXB_VALID	BIT(3)
+#define MACEPAR_CTLSTAT_CTXA_VALID	BIT(4)
+	volatile u64 cntlstat;		/* Control/Status register */
+#define MACEPAR_DIAG_CTXINUSE		BIT(0)
+	/* 1 - Dma engine is enabled and processing something */
+#define MACEPAR_DIAG_DMACTIVE		BIT(1)
+	/* Counter of bytes left */
+#define MACEPAR_DIAG_CTRMASK		0x0000000000003ffcUL
+#define MACEPAR_DIAG_CTRSHIFT		2
+	volatile u64 diagnostic;	/* RO: diagnostic register */
 };
 
 /* ISA Control and DMA registers */