1 files changed, 29 insertions, 0 deletions
diff --git a/arch/sh/include/asm/cache.h b/arch/sh/include/asm/cache.h
new file mode 100644
index 0000000..b548a35
--- /dev/null
+++ b/arch/sh/include/asm/cache.h
@@ -0,0 +1,29 @@
+#ifndef __ASM_SH_CACHE_H
+#define __ASM_SH_CACHE_H
+
+#if defined(CONFIG_CPU_SH4)
+
+#define L1_CACHE_BYTES 32
+
+struct __large_struct { unsigned long buf[100]; };
+#define __m(x) (*(struct __large_struct *)(x))
+
+#else
+
+/*
+ * 32-bytes is the largest L1 data cache line size for SH the architecture.  So
+ * it is a safe default for DMA alignment.
+ */
+#define ARCH_DMA_MINALIGN	32
+
+#endif /* CONFIG_CPU_SH4 */
+
+/*
+ * Use the L1 data cache line size value for the minimum DMA buffer alignment
+ * on SH.
+ */
+#ifndef ARCH_DMA_MINALIGN
+#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
+#endif
+
+#endif	/* __ASM_SH_CACHE_H */