OpenRISC: Headers

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 42 insertions, 0 deletions

diff --git a/arch/openrisc/include/asm/spr.h b/arch/openrisc/include/asm/spr.h
new file mode 100644
index 000000000000..1cccb42dd477
--- /dev/null
+++ b/arch/openrisc/include/asm/spr.h
@@ -0,0 +1,42 @@
+/*
+ * OpenRISC Linux
+ *
+ * Linux architectural port borrowing liberally from similar works of
+ * others.  All original copyrights apply as per the original source
+ * declaration.
+ *
+ * OpenRISC implementation:
+ * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __ASM_OPENRISC_SPR_H
+#define __ASM_OPENRISC_SPR_H
+
+#define mtspr(_spr, _val) __asm__ __volatile__ (                \
+        "l.mtspr r0,%1,%0"                                      \
+        : : "K" (_spr), "r" (_val))
+#define mtspr_off(_spr, _off, _val) __asm__ __volatile__ (      \
+        "l.mtspr %0,%1,%2"                                      \
+        : : "r" (_off), "r" (_val), "K" (_spr))
+
+static inline unsigned long mfspr(unsigned long add)
+{
+        unsigned long ret;
+        __asm__ __volatile__ ("l.mfspr %0,r0,%1" : "=r" (ret) : "K" (add));
+        return ret;
+}
+
+static inline unsigned long mfspr_off(unsigned long add, unsigned long offset)
+{
+        unsigned long ret;
+        __asm__ __volatile__ ("l.mfspr %0,%1,%2" : "=r" (ret)
+                                                 : "r" (offset), "K" (add));
+        return ret;
+}
+
+#endif