xnu-792.22.5.tar.gz

[apple/xnu.git] / osfmk / i386 / tsc.h

diff --git a/osfmk/i386/tsc.h b/osfmk/i386/tsc.h
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+/*
+ * Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+/*
+ * @OSF_COPYRIGHT@
+ */
+/*
+ * @APPLE_FREE_COPYRIGHT@
+ */
+/*
+ *     File:           tsc.h
+ *     Purpose:        Contains the TSC initialization and conversion
+ *                     factors.
+ */
+#ifdef KERNEL_PRIVATE
+#ifndef _I386_TSC_H_
+#define _I386_TSC_H_
+
+#define BusRatioShift 40
+#define BusRatioMask 0x1F
+#define IA32_PERF_STS 0x198
+
+extern uint64_t        busFCvtt2n;
+extern uint64_t        busFCvtn2t;
+extern uint64_t tscFreq;
+extern uint64_t tscFCvtt2n;
+extern uint64_t tscFCvtn2t;
+extern uint64_t tscGranularity;
+extern uint64_t bus2tsc;
+
+struct tscInfo
+{
+uint64_t       busFCvtt2n;
+uint64_t       busFCvtn2t;
+uint64_t       tscFreq;
+uint64_t       tscFCvtt2n;
+uint64_t       tscFCvtn2t;
+uint64_t       tscGranularity;
+uint64_t       bus2tsc;
+};
+typedef struct tscInfo tscInfo_t;
+
+extern void tsc_get_info(tscInfo_t *info);
+
+extern void tsc_init(void);
+
+#endif /* _I386_TSC_H_ */
+#endif /* KERNEL_PRIVATE */