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-rw-r--r--arch/arm/include/asm/hardware/memc.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/include/asm/hardware/memc.h b/arch/arm/include/asm/hardware/memc.h
new file mode 100644
index 000000000..1d4ebe0a9
--- /dev/null
+++ b/arch/arm/include/asm/hardware/memc.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * arch/arm/include/asm/hardware/memc.h
+ *
+ * Copyright (C) Russell King.
+ */
+#define VDMA_ALIGNMENT PAGE_SIZE
+#define VDMA_XFERSIZE 16
+#define VDMA_INIT 0
+#define VDMA_START 1
+#define VDMA_END 2
+
+#ifndef __ASSEMBLY__
+extern void memc_write(unsigned int reg, unsigned long val);
+
+#define video_set_dma(start,end,offset) \
+do { \
+ memc_write (VDMA_START, (start >> 2)); \
+ memc_write (VDMA_END, (end - VDMA_XFERSIZE) >> 2); \
+ memc_write (VDMA_INIT, (offset >> 2)); \
+} while (0)
+
+#endif