1 files changed, 59 insertions, 0 deletions
diff --git a/include/asm-arm/unaligned.h b/include/asm-arm/unaligned.h
new file mode 100644
index 000000000..9b86bd415
--- /dev/null
+++ b/include/asm-arm/unaligned.h
@@ -0,0 +1,59 @@
+#ifndef __ARM_UNALIGNED_H
+#define __ARM_UNALIGNED_H
+
+#define get_unaligned(ptr) \
+	((__typeof__(*(ptr)))__get_unaligned((ptr), sizeof(*(ptr))))
+
+#define put_unaligned(val, ptr) \
+	__put_unaligned((unsigned long)(val), (ptr), sizeof(*(ptr)))
+
+extern void bad_unaligned_access_length (void);
+	
+extern inline unsigned long __get_unaligned(const void *ptr, size_t size)
+{
+    unsigned long val;
+    switch (size) {
+	case 1:
+	    val = *(const unsigned char *)ptr;
+	    break;
+
+	case 2:
+	    val = ((const unsigned char *)ptr)[0] | (((const unsigned char *)ptr)[1] << 8);
+	    break;
+
+	case 4:
+	    val = ((const unsigned char *)ptr)[0]        | (((const unsigned char *)ptr)[1] << 8) |
+		 (((const unsigned char *)ptr)[2]) << 16 | (((const unsigned char *)ptr)[3] << 24);
+	    break;
+
+	default:
+	    bad_unaligned_access_length ();
+    }
+    return val;
+}
+
+extern inline void __put_unaligned(unsigned long val, void *ptr, size_t size)
+{
+    switch (size) {
+	case 1:
+	    *(unsigned char *)ptr = val;
+	    break;
+
+	case 2:
+	    ((unsigned char *)ptr)[0] = val;
+	    ((unsigned char *)ptr)[1] = val >> 8;
+	    break;
+
+	case 4:
+	    ((unsigned char *)ptr)[0] = val;
+	    ((unsigned char *)ptr)[1] = val >> 8;
+	    ((unsigned char *)ptr)[2] = val >> 16;
+	    ((unsigned char *)ptr)[3] = val >> 24;
+	    break;
+
+	default:
+	    bad_unaligned_access_length ();
+    }
+}
+
+#endif