1 files changed, 20 insertions, 0 deletions
diff --git a/arch/s390/include/asm/dma.h b/arch/s390/include/asm/dma.h
new file mode 100644
index 000000000..6f26f35d4
--- /dev/null
+++ b/arch/s390/include/asm/dma.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_S390_DMA_H
+#define _ASM_S390_DMA_H
+
+#include <asm/io.h>
+
+/*
+ * MAX_DMA_ADDRESS is ambiguous because on s390 its completely unrelated
+ * to DMA. It _is_ used for the s390 memory zone split at 2GB caused
+ * by the 31 bit heritage.
+ */
+#define MAX_DMA_ADDRESS         0x80000000
+
+#ifdef CONFIG_PCI
+extern int isa_dma_bridge_buggy;
+#else
+#define isa_dma_bridge_buggy	(0)
+#endif
+
+#endif /* _ASM_S390_DMA_H */