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-rw-r--r--kernel/arch/s390/include/asm/dma.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/arch/s390/include/asm/dma.h b/kernel/arch/s390/include/asm/dma.h
new file mode 100644
index 000000000..bb9bdcd20
--- /dev/null
+++ b/kernel/arch/s390/include/asm/dma.h
@@ -0,0 +1,19 @@
+#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 */