1 files changed, 31 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/msi.h b/arch/sparc/include/asm/msi.h
new file mode 100644
index 000000000000..724ca5667052
--- /dev/null
+++ b/arch/sparc/include/asm/msi.h
@@ -0,0 +1,31 @@
+/*
+ * msi.h:  Defines specific to the MBus - Sbus - Interface.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996 Eddie C. Dost   (ecd@skynet.be)
+ */
+
+#ifndef _SPARC_MSI_H
+#define _SPARC_MSI_H
+
+/*
+ * Locations of MSI Registers.
+ */
+#define MSI_MBUS_ARBEN  0xe0001008      /* MBus Arbiter Enable register */
+
+/*
+ * Useful bits in the MSI Registers.
+ */
+#define MSI_ASYNC_MODE  0x80000000      /* Operate the MSI asynchronously */
+
+
+static inline void msi_set_sync(void)
+{
+        __asm__ __volatile__ ("lda [%0] %1, %%g3\n\t"
+                              "andn %%g3, %2, %%g3\n\t"
+                              "sta %%g3, [%0] %1\n\t" : :
+                              "r" (MSI_MBUS_ARBEN),
+                              "i" (ASI_M_CTL), "r" (MSI_ASYNC_MODE) : "g3");
+}
+
+#endif /* !(_SPARC_MSI_H) */