1 files changed, 53 insertions, 0 deletions
diff --git a/sys/boot/ia64/libski/ssc.c b/sys/boot/ia64/libski/ssc.c
new file mode 100644
index 0000000..e1f871c
--- /dev/null
+++ b/sys/boot/ia64/libski/ssc.c
@@ -0,0 +1,53 @@
+/*-
+ * Copyright (c) 2001 Doug Rabson
+ * 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 AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include "libski.h"
+
+/*
+ * Ugh... Work around a bug in the Linux version of ski for SSC_GET_RTC. The
+ * PSR.dt register is not preserved properly and causes further memory
+ * references to be done without translation. All we need to do is preserve
+ * PSR.dt across the SSC call. We do this by saving and restoring psr.l
+ * completely.
+ */
+u_int64_t
+ssc(u_int64_t in0, u_int64_t in1, u_int64_t in2, u_int64_t in3, int which)
+{
+	register u_int64_t psr;
+	register u_int64_t ret0 __asm("r8");
+
+	__asm __volatile("mov %0=psr;;" : "=r"(psr));
+	__asm __volatile("mov r15=%1\n\t"
+			 "break 0x80000;;"
+			 : "=r"(ret0)
+			 : "r"(which), "r"(in0), "r"(in1), "r"(in2), "r"(in3));
+	__asm __volatile("mov psr.l=%0;; srlz.d" :: "r"(psr));
+	return ret0;
+}