1 files changed, 63 insertions, 0 deletions
diff --git a/sys/powerpc/powernv/opal.c b/sys/powerpc/powernv/opal.c
new file mode 100644
index 000000000000..9436412328e2
--- /dev/null
+++ b/sys/powerpc/powernv/opal.c
@@ -0,0 +1,63 @@
+/*-
+ * Copyright (C) 2015 Nathan Whitehorn
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <dev/ofw/openfirm.h>
+
+#include "opal.h"
+
+extern uint64_t opal_entrypoint;
+extern uint64_t opal_data;
+extern uint64_t opal_msr;
+
+static int opal_initialized = 0;
+
+int
+opal_check(void)
+{
+	phandle_t opal;
+	cell_t val[2];
+
+	if (opal_initialized)
+		return (0);
+
+	opal = OF_finddevice("/ibm,opal");
+	if (opal == -1)
+		return (ENOENT);
+
+	if (!OF_hasprop(opal, "opal-base-address") ||
+	    !OF_hasprop(opal, "opal-entry-address"))
+		return (ENOENT);
+
+	OF_getencprop(opal, "opal-base-address", val, sizeof(val));
+	opal_data = ((uint64_t)val[0] << 32) | val[1];
+	OF_getencprop(opal, "opal-entry-address", val, sizeof(val));
+	opal_entrypoint = ((uint64_t)val[0] << 32) | val[1];
+
+	opal_msr = mfmsr() & ~(PSL_EE | PSL_IR | PSL_DR | PSL_SE | PSL_LE);
+
+	opal_initialized = 1;
+
+	return (0);
+}