Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sh / include / cpu-sh3 / cpu / dma-register.h

diff --git a/kernel/arch/sh/include/cpu-sh3/cpu/dma-register.h b/kernel/arch/sh/include/cpu-sh3/cpu/dma-register.h
new file mode 100644 (file)
index 0000000..2349e48
--- /dev/null
+++ b/kernel/arch/sh/include/cpu-sh3/cpu/dma-register.h
@@ -0,0 +1,41 @@
+/*
+ * SH3 CPU-specific DMA definitions, used by both DMA drivers
+ *
+ * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef CPU_DMA_REGISTER_H
+#define CPU_DMA_REGISTER_H
+
+#define CHCR_TS_LOW_MASK       0x18
+#define CHCR_TS_LOW_SHIFT      3
+#define CHCR_TS_HIGH_MASK      0
+#define CHCR_TS_HIGH_SHIFT     0
+
+#define DMAOR_INIT     DMAOR_DME
+
+/*
+ * The SuperH DMAC supports a number of transmit sizes, we list them here,
+ * with their respective values as they appear in the CHCR registers.
+ */
+enum {
+       XMIT_SZ_8BIT,
+       XMIT_SZ_16BIT,
+       XMIT_SZ_32BIT,
+       XMIT_SZ_128BIT,
+};
+
+/* log2(size / 8) - used to calculate number of transfers */
+#define TS_SHIFT {                     \
+       [XMIT_SZ_8BIT]          = 0,    \
+       [XMIT_SZ_16BIT]         = 1,    \
+       [XMIT_SZ_32BIT]         = 2,    \
+       [XMIT_SZ_128BIT]        = 4,    \
+}
+
+#define TS_INDEX2VAL(i)        (((i) & 3) << CHCR_TS_LOW_SHIFT)
+
+#endif