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 <[EMAIL PROTECTED]>
Acked-by: Stefan Reinauer <[EMAIL PROTECTED]>
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 */
--
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