1 files changed, 45 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/sbus.h b/arch/m68k/include/asm/sbus.h
new file mode 100644
index 000000000000..bfe3ba147f2e
--- /dev/null
+++ b/arch/m68k/include/asm/sbus.h
@@ -0,0 +1,45 @@
+/*
+ * some sbus structures and macros to make usage of sbus drivers possible
+ */
+
+#ifndef __M68K_SBUS_H
+#define __M68K_SBUS_H
+
+struct sbus_dev {
+        struct {
+                unsigned int which_io;
+                unsigned int phys_addr;
+        } reg_addrs[1];
+};
+
+/* sbus IO functions stolen from include/asm-sparc/io.h for the serial driver */
+/* No SBUS on the Sun3, kludge -- sam */
+
+static inline void _sbus_writeb(unsigned char val, unsigned long addr)
+{
+        *(volatile unsigned char *)addr = val;
+}
+
+static inline unsigned char _sbus_readb(unsigned long addr)
+{
+        return *(volatile unsigned char *)addr;
+}
+
+static inline void _sbus_writel(unsigned long val, unsigned long addr)
+{
+        *(volatile unsigned long *)addr = val;
+
+}
+
+extern inline unsigned long _sbus_readl(unsigned long addr)
+{
+        return *(volatile unsigned long *)addr;
+}
+
+
+#define sbus_readb(a) _sbus_readb((unsigned long)a)
+#define sbus_writeb(v, a) _sbus_writeb(v, (unsigned long)a)
+#define sbus_readl(a) _sbus_readl((unsigned long)a)
+#define sbus_writel(v, a) _sbus_writel(v, (unsigned long)a)
+
+#endif