msrtool: Release Candidate 1

[coreboot.git] / util / msrtool / sys.c

diff --git a/util/msrtool/sys.c b/util/msrtool/sys.c
new file mode 100644 (file)
index 0000000..95539c8
--- /dev/null
+++ b/util/msrtool/sys.c
@@ -0,0 +1,42 @@
+/*
+ * This file is part of msrtool.
+ *
+ * Copyright (c) 2008 Peter Stuge <peter@stuge.se>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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
+ */
+
+#include "msrtool.h"
+
+static struct cpuid_t id;
+
+struct cpuid_t *cpuid(void) {
+       uint32_t outeax;
+       asm ("cpuid" : "=a" (outeax) : "a" (1) : "%ebx", "%ecx", "%edx");
+       id.stepping = outeax & 0xf;
+       outeax >>= 4;
+       id.model = outeax & 0xf;
+       outeax >>= 4;
+       id.family = outeax & 0xf;
+       outeax >>= 8;
+       id.ext_model = outeax & 0xf;
+       outeax >>= 4;
+       id.ext_family = outeax & 0xff;
+       if (0xf == id.family) {
+               /* Intel says always do this, AMD says only for family f */
+               id.model |= (id.ext_model << 4);
+               id.family += id.ext_family;
+       }
+       return &id;
+}