[LinuxBIOS] r335 - LinuxBIOSv3/include/arch/x86

[svn at openbios.org]

Author: rminnich
Date: 2007-05-24 22:33:46 +0200 (Thu, 24 May 2007)
New Revision: 335

Added:
   LinuxBIOSv3/include/arch/x86/msr.h
Log:
 add msr.h to v3

Signed-off-by: Ronald G. Minnich <rminnich at gmail.com>

Acked-by: Stefan Reinauer <stepan at coresystems.de>


Added: LinuxBIOSv3/include/arch/x86/msr.h
===================================================================
--- LinuxBIOSv3/include/arch/x86/msr.h	                        (rev 0)
+++ LinuxBIOSv3/include/arch/x86/msr.h	2007-05-24 20:33:46 UTC (rev 335)
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the LinuxBIOS project.
+ *
+ * Copyright (C) 2007 Ron Minnich 
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef CPU_X86_MSR_H
+#define CPU_X86_MSR_H
+
+/* standard MSR operations, everyone has written these one hundred times */
+
+typedef struct msr_struct 
+{
+	unsigned lo;
+	unsigned hi;
+} msr_t;
+
+static inline msr_t rdmsr(unsigned index)
+{
+	msr_t result;
+	__asm__ __volatile__ (
+		"rdmsr"
+		: "=a" (result.lo), "=d" (result.hi)
+		: "c" (index)
+		);
+	return result;
+}
+
+static inline void wrmsr(unsigned index, msr_t msr)
+{
+	__asm__ __volatile__ (
+		"wrmsr"
+		: /* No outputs */
+		: "c" (index), "a" (msr.lo), "d" (msr.hi)
+		);
+}
+
+
+#endif /* CPU_X86_MSR_H */