/*	$OpenBSD: est.c,v 1.30 2007/06/07 11:20:58 dim Exp $ */
/*
 * Copyright (c) 2003 Michael Eriksson.
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */


/*
 * This is a driver for Intel's Enhanced SpeedStep, as implemented in
 * Pentium M processors.
 *
 * Reference documentation:
 *
 * - IA-32 Intel Architecture Software Developer's Manual, Volume 3:
 *   System Programming Guide.
 *   Section 13.14, Enhanced Intel SpeedStep technology.
 *   Table B-2, MSRs in Pentium M Processors.
 *   http://www.intel.com/design/pentium4/manuals/245472.htm
 *
 * - Intel Pentium M Processor Datasheet.
 *   Table 5, Voltage and Current Specifications.
 *   http://www.intel.com/design/mobile/datashts/252612.htm
 *
 * - Intel Pentium M Processor on 90 nm Process with 2-MB L2 Cache Datasheet
 *   Table 3-4, Voltage and Current Specifications.
 *   http://www.intel.com/design/mobile/datashts/302189.htm
 *
 * - Linux cpufreq patches, speedstep-centrino.c.
 *   Encoding of MSR_PERF_CTL and MSR_PERF_STATUS.
 *   http://www.codemonkey.org.uk/projects/cpufreq/cpufreq-2.4.22-pre6-1.gz
 */


#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysctl.h>

#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/specialreg.h>


/* Convert MHz and mV into IDs for passing to the MSR. */
#define ID16(MHz, mV, bus_clk) \
	((((MHz * 100 + 50) / bus_clk) << 8) | ((mV ? mV - 700 : 0) >> 4))


/* Ultra Low Voltage Intel Pentium M processor 900 MHz */
static const u_int16_t pm130_900_ulv[] = {
	ID16( 900, 1004, BUS100),
	ID16( 800,  988, BUS100),
	ID16( 600,  844, BUS100),
};

/* Ultra Low Voltage Intel Pentium M processor 1.00 GHz */
static const u_int16_t pm130_1000_ulv[] = {
	ID16(1000, 1004, BUS100),
	ID16( 900,  988, BUS100),
	ID16( 800,  972, BUS100),
	ID16( 600,  844, BUS100),
};

/* Ultra Low Voltage Intel Pentium M processor 1.10 GHz */
static const u_int16_t pm130_1100_ulv[] = {
	ID16(1100, 1004, BUS100),
	ID16(1000,  988, BUS100),
	ID16( 900,  972, BUS100),
	ID16( 800,  956, BUS100),
	ID16( 600,  844, BUS100),
};

/* Low Voltage Intel Pentium M processor 1.10 GHz */
static const u_int16_t pm130_1100_lv[] = {
	ID16(1100, 1180, BUS100),
	ID16(1000, 1164, BUS100),
	ID16( 900, 1100, BUS100),
	ID16( 800, 1020, BUS100),
	ID16( 600,  956, BUS100),
};

/* Low Voltage Intel Pentium M processor 1.20 GHz */
static const u_int16_t pm130_1200_lv[] = {
	ID16(1200, 1180, BUS100),
	ID16(1100, 1164, BUS100),
	ID16(1000, 1100, BUS100),
	ID16( 900, 1020, BUS100),
	ID16( 800, 1004, BUS100),
	ID16( 600,  956, BUS100),
};

/* Low Voltage Intel Pentium M processor 1.30 GHz */
static const u_int16_t pm130_1300_lv[] = {
	ID16(1300, 1180, BUS100),
	ID16(1200, 1164, BUS100),
	ID16(1100, 1100, BUS100),
	ID16(1000, 1020, BUS100),
	ID16( 900, 1004, BUS100),
	ID16( 800,  988, BUS100),
	ID16( 600,  956, BUS100),
};

/* Intel Pentium M processor 1.30 GHz */
static const u_int16_t pm130_1300[] = {
	ID16(1300, 1388, BUS100),
	ID16(1200, 1356, BUS100),
	ID16(1000, 1292, BUS100),
	ID16( 800, 1260, BUS100),
	ID16( 600,  956, BUS100),
};

/* Intel Pentium M processor 1.40 GHz */
static const u_int16_t pm130_1400[] = {
	ID16(1400, 1484, BUS100),
	ID16(1200, 1436, BUS100),
	ID16(1000, 1308, BUS100),
	ID16( 800, 1180, BUS100),
	ID16( 600,  956, BUS100),
};

/* Intel Pentium M processor 1.50 GHz */
static const u_int16_t pm130_1500[] = {
	ID16(1500, 1484, BUS100),
	ID16(1400, 1452, BUS100),
	ID16(1200, 1356, BUS100),
	ID16(1000, 1228, BUS100),
	ID16( 800, 1116, BUS100),
	ID16( 600,  956, BUS100),
};

/* Intel Pentium M processor 1.60 GHz */
static const u_int16_t pm130_1600[] = {
	ID16(1600, 1484, BUS100),
	ID16(1400, 1420, BUS100),
	ID16(1200, 1276, BUS100),
	ID16(1000, 1164, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  956, BUS100),
};

/* Intel Pentium M processor 1.70 GHz */
static const u_int16_t pm130_1700[] = {
	ID16(1700, 1484, BUS100),
	ID16(1400, 1308, BUS100),
	ID16(1200, 1228, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1004, BUS100),
	ID16( 600,  956, BUS100),
};

/* Intel Pentium M processor 723 1.0 GHz */
static const u_int16_t pm90_n723[] = {
	ID16(1000,  940, BUS100),
	ID16( 900,  908, BUS100),
	ID16( 800,  876, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 733 1.1 GHz, VID #G */
static const u_int16_t pm90_n733g[] = {
	ID16(1100,  956, BUS100),
	ID16(1000,  940, BUS100),
	ID16( 900,  908, BUS100),
	ID16( 800,  876, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 733 1.1 GHz, VID #H */
static const u_int16_t pm90_n733h[] = {
	ID16(1100,  940, BUS100),
	ID16(1000,  924, BUS100),
	ID16( 900,  892, BUS100),
	ID16( 800,  876, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 733 1.1 GHz, VID #I */
static const u_int16_t pm90_n733i[] = {
	ID16(1100,  924, BUS100),
	ID16(1000,  908, BUS100),
	ID16( 900,  892, BUS100),
	ID16( 800,  860, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 733 1.1 GHz, VID #J */
static const u_int16_t pm90_n733j[] = {
	ID16(1100,  908, BUS100),
	ID16(1000,  892, BUS100),
	ID16( 900,  876, BUS100),
	ID16( 800,  860, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 733 1.1 GHz, VID #K */
static const u_int16_t pm90_n733k[] = {
	ID16(1100,  892, BUS100),
	ID16(1000,  876, BUS100),
	ID16( 900,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 733 1.1 GHz, VID #L */
static const u_int16_t pm90_n733l[] = {
	ID16(1100,  876, BUS100),
	ID16(1000,  876, BUS100),
	ID16( 900,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 753 1.2 GHz, VID #G */
static const u_int16_t pm90_n753g[] = {
	ID16(1200,  956, BUS100),
	ID16(1100,  940, BUS100),
	ID16(1000,  908, BUS100),
	ID16( 900,  892, BUS100),
	ID16( 800,  860, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 753 1.2 GHz, VID #H */
static const u_int16_t pm90_n753h[] = {
	ID16(1200,  940, BUS100),
	ID16(1100,  924, BUS100),
	ID16(1000,  908, BUS100),
	ID16( 900,  876, BUS100),
	ID16( 800,  860, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 753 1.2 GHz, VID #I */
static const u_int16_t pm90_n753i[] = {
	ID16(1200,  924, BUS100),
	ID16(1100,  908, BUS100),
	ID16(1000,  892, BUS100),
	ID16( 900,  876, BUS100),
	ID16( 800,  860, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 753 1.2 GHz, VID #J */
static const u_int16_t pm90_n753j[] = {
	ID16(1200,  908, BUS100),
	ID16(1100,  892, BUS100),
	ID16(1000,  876, BUS100),
	ID16( 900,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 753 1.2 GHz, VID #K */
static const u_int16_t pm90_n753k[] = {
	ID16(1200,  892, BUS100),
	ID16(1100,  892, BUS100),
	ID16(1000,  876, BUS100),
	ID16( 900,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 753 1.2 GHz, VID #L */
static const u_int16_t pm90_n753l[] = {
	ID16(1200,  876, BUS100),
	ID16(1100,  876, BUS100),
	ID16(1000,  860, BUS100),
	ID16( 900,  844, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 773 1.3 GHz, VID #G */
static const u_int16_t pm90_n773g[] = {
	ID16(1300,  956, BUS100),
	ID16(1200,  940, BUS100),
	ID16(1100,  924, BUS100),
	ID16(1000,  908, BUS100),
	ID16( 900,  876, BUS100),
	ID16( 800,  860, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 773 1.3 GHz, VID #H */
static const u_int16_t pm90_n773h[] = {
	ID16(1300,  940, BUS100),
	ID16(1200,  924, BUS100),
	ID16(1100,  908, BUS100),
	ID16(1000,  892, BUS100),
	ID16( 900,  876, BUS100),
	ID16( 800,  860, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 773 1.3 GHz, VID #I */
static const u_int16_t pm90_n773i[] = {
	ID16(1300,  924, BUS100),
	ID16(1200,  908, BUS100),
	ID16(1100,  892, BUS100),
	ID16(1000,  876, BUS100),
	ID16( 900,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 773 1.3 GHz, VID #J */
static const u_int16_t pm90_n773j[] = {
	ID16(1300,  908, BUS100),
	ID16(1200,  908, BUS100),
	ID16(1100,  892, BUS100),
	ID16(1000,  876, BUS100),
	ID16( 900,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 773 1.3 GHz, VID #K */
static const u_int16_t pm90_n773k[] = {
	ID16(1300,  892, BUS100),
	ID16(1200,  892, BUS100),
	ID16(1100,  876, BUS100),
	ID16(1000,  860, BUS100),
	ID16( 900,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 773 1.3 GHz, VID #L */
static const u_int16_t pm90_n773l[] = {
	ID16(1300,  876, BUS100),
	ID16(1200,  876, BUS100),
	ID16(1100,  860, BUS100),
	ID16(1000,  860, BUS100),
	ID16( 900,  844, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  812, BUS100),
};

/* Intel Pentium M processor 738 1.4 GHz */
static const u_int16_t pm90_n738[] = {
	ID16(1400, 1116, BUS100),
	ID16(1300, 1116, BUS100),
	ID16(1200, 1100, BUS100),
	ID16(1100, 1068, BUS100),
	ID16(1000, 1052, BUS100),
	ID16( 900, 1036, BUS100),
	ID16( 800, 1020, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 758 1.5 GHz */
static const u_int16_t pm90_n758[] = {
	ID16(1500, 1116, BUS100),
	ID16(1400, 1116, BUS100),
	ID16(1300, 1100, BUS100),
	ID16(1200, 1084, BUS100),
	ID16(1100, 1068, BUS100),
	ID16(1000, 1052, BUS100),
	ID16( 900, 1036, BUS100),
	ID16( 800, 1020, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 778 1.6 GHz */
static const u_int16_t pm90_n778[] = {
	ID16(1600, 1116, BUS100),
	ID16(1500, 1116, BUS100),
	ID16(1400, 1100, BUS100),
	ID16(1300, 1184, BUS100),
	ID16(1200, 1068, BUS100),
	ID16(1100, 1052, BUS100),
	ID16(1000, 1052, BUS100),
	ID16( 900, 1036, BUS100),
	ID16( 800, 1020, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 710 1.4 GHz, 533 MHz FSB */
static const u_int16_t pm90_n710[] = {
	ID16(1400, 1340, BUS133),
	ID16(1200, 1228, BUS133),
	ID16(1000, 1148, BUS133),
	ID16( 800, 1068, BUS133),
	ID16( 600,  998, BUS133),
};

/* Intel Pentium M processor 715 1.5 GHz, VID #A */
static const u_int16_t pm90_n715a[] = {
	ID16(1500, 1340, BUS100),
	ID16(1200, 1228, BUS100),
	ID16(1000, 1148, BUS100),
	ID16( 800, 1068, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 715 1.5 GHz, VID #B */
static const u_int16_t pm90_n715b[] = {
	ID16(1500, 1324, BUS100),
	ID16(1200, 1212, BUS100),
	ID16(1000, 1148, BUS100),
	ID16( 800, 1068, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 715 1.5 GHz, VID #C */
static const u_int16_t pm90_n715c[] = {
	ID16(1500, 1308, BUS100),
	ID16(1200, 1212, BUS100),
	ID16(1000, 1132, BUS100),
	ID16( 800, 1068, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 715 1.5 GHz, VID #D */
static const u_int16_t pm90_n715d[] = {
	ID16(1500, 1276, BUS100),
	ID16(1200, 1180, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 725 1.6 GHz, VID #A */
static const u_int16_t pm90_n725a[] = {
	ID16(1600, 1340, BUS100),
	ID16(1400, 1276, BUS100),
	ID16(1200, 1212, BUS100),
	ID16(1000, 1132, BUS100),
	ID16( 800, 1068, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 725 1.6 GHz, VID #B */
static const u_int16_t pm90_n725b[] = {
	ID16(1600, 1324, BUS100),
	ID16(1400, 1260, BUS100),
	ID16(1200, 1196, BUS100),
	ID16(1000, 1132, BUS100),
	ID16( 800, 1068, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 725 1.6 GHz, VID #C */
static const u_int16_t pm90_n725c[] = {
	ID16(1600, 1308, BUS100),
	ID16(1400, 1244, BUS100),
	ID16(1200, 1180, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 725 1.6 GHz, VID #D */
static const u_int16_t pm90_n725d[] = {
	ID16(1600, 1276, BUS100),
	ID16(1400, 1228, BUS100),
	ID16(1200, 1164, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 730 1.6 GHz, 533 MHz FSB */
static const u_int16_t pm90_n730[] = {
	ID16(1600, 1308, BUS133),
	ID16(1333, 1260, BUS133),
	ID16(1200, 1212, BUS133),
	ID16(1067, 1180, BUS133),
	ID16( 800,  988, BUS133),
};

/* Intel Pentium M processor 735 1.7 GHz, VID #A */
static const u_int16_t pm90_n735a[] = {
	ID16(1700, 1340, BUS100),
	ID16(1400, 1244, BUS100),
	ID16(1200, 1180, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 735 1.7 GHz, VID #B */
static const u_int16_t pm90_n735b[] = {
	ID16(1700, 1324, BUS100),
	ID16(1400, 1244, BUS100),
	ID16(1200, 1180, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 735 1.7 GHz, VID #C */
static const u_int16_t pm90_n735c[] = {
	ID16(1700, 1308, BUS100),
	ID16(1400, 1228, BUS100),
	ID16(1200, 1164, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 735 1.7 GHz, VID #D */
static const u_int16_t pm90_n735d[] = {
	ID16(1700, 1276, BUS100),
	ID16(1400, 1212, BUS100),
	ID16(1200, 1148, BUS100),
	ID16(1000, 1100, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 740 1.73 GHz, 533 MHz FSB */
static const u_int16_t pm90_n740[] = {
	ID16(1733, 1356, BUS133),
	ID16(1333, 1212, BUS133),
	ID16(1067, 1100, BUS133),
	ID16( 800,  988, BUS133),
};

/* Intel Pentium M processor 745 1.8 GHz, VID #A */
static const u_int16_t pm90_n745a[] = {
	ID16(1800, 1340, BUS100),
	ID16(1600, 1292, BUS100),
	ID16(1400, 1228, BUS100),
	ID16(1200, 1164, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 745 1.8 GHz, VID #B */
static const u_int16_t pm90_n745b[] = {
	ID16(1800, 1324, BUS100),
	ID16(1600, 1276, BUS100),
	ID16(1400, 1212, BUS100),
	ID16(1200, 1164, BUS100),
	ID16(1000, 1116, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 745 1.8 GHz, VID #C */
static const u_int16_t pm90_n745c[] = {
	ID16(1800, 1308, BUS100),
	ID16(1600, 1260, BUS100),
	ID16(1400, 1212, BUS100),
	ID16(1200, 1148, BUS100),
	ID16(1000, 1100, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 745 1.8 GHz, VID #D */
static const u_int16_t pm90_n745d[] = {
	ID16(1800, 1276, BUS100),
	ID16(1600, 1228, BUS100),
	ID16(1400, 1180, BUS100),
	ID16(1200, 1132, BUS100),
	ID16(1000, 1084, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 750 1.86 GHz, 533 MHz FSB */
/* values extracted from \_PR\NPSS (via _PSS) SDST ACPI table */
static const u_int16_t pm90_n750[] = {
	ID16(1867, 1308, BUS133),
	ID16(1600, 1228, BUS133),
	ID16(1333, 1148, BUS133),
	ID16(1067, 1068, BUS133),
	ID16( 800,  988, BUS133),
};

/* Intel Pentium M processor 755 2.0 GHz, VID #A */
static const u_int16_t pm90_n755a[] = {
	ID16(2000, 1340, BUS100),
	ID16(1800, 1292, BUS100),
	ID16(1600, 1244, BUS100),
	ID16(1400, 1196, BUS100),
	ID16(1200, 1148, BUS100),
	ID16(1000, 1100, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 755 2.0 GHz, VID #B */
static const u_int16_t pm90_n755b[] = {
	ID16(2000, 1324, BUS100),
	ID16(1800, 1276, BUS100),
	ID16(1600, 1228, BUS100),
	ID16(1400, 1180, BUS100),
	ID16(1200, 1132, BUS100),
	ID16(1000, 1084, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 755 2.0 GHz, VID #C */
static const u_int16_t pm90_n755c[] = {
	ID16(2000, 1308, BUS100),
	ID16(1800, 1276, BUS100),
	ID16(1600, 1228, BUS100),
	ID16(1400, 1180, BUS100),
	ID16(1200, 1132, BUS100),
	ID16(1000, 1084, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 755 2.0 GHz, VID #D */
static const u_int16_t pm90_n755d[] = {
	ID16(2000, 1276, BUS100),
	ID16(1800, 1244, BUS100),
	ID16(1600, 1196, BUS100),
	ID16(1400, 1164, BUS100),
	ID16(1200, 1116, BUS100),
	ID16(1000, 1084, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 760 2.0 GHz, 533 MHz FSB */
static const u_int16_t pm90_n760[] = {
	ID16(2000, 1356, BUS133),
	ID16(1600, 1244, BUS133),
	ID16(1333, 1164, BUS133),
	ID16(1067, 1084, BUS133),
	ID16( 800,  988, BUS133),
};

/* Intel Pentium M processor 765 2.1 GHz, VID #A */
static const u_int16_t pm90_n765a[] = {
	ID16(2100, 1340, BUS100),
	ID16(1800, 1276, BUS100),
	ID16(1600, 1228, BUS100),
	ID16(1400, 1180, BUS100),
	ID16(1200, 1132, BUS100),
	ID16(1000, 1084, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 765 2.1 GHz, VID #B */
static const u_int16_t pm90_n765b[] = {
	ID16(2100, 1324, BUS100),
	ID16(1800, 1260, BUS100),
	ID16(1600, 1212, BUS100),
	ID16(1400, 1180, BUS100),
	ID16(1200, 1132, BUS100),
	ID16(1000, 1084, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 765 2.1 GHz, VID #C */
static const u_int16_t pm90_n765c[] = {
	ID16(2100, 1308, BUS100),
	ID16(1800, 1244, BUS100),
	ID16(1600, 1212, BUS100),
	ID16(1400, 1164, BUS100),
	ID16(1200, 1116, BUS100),
	ID16(1000, 1084, BUS100),
	ID16( 800, 1036, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 765 2.1 GHz, VID #E */
static const u_int16_t pm90_n765e[] = {
	ID16(2100, 1356, BUS100),
	ID16(1800, 1292, BUS100),
	ID16(1600, 1244, BUS100),
	ID16(1400, 1196, BUS100),
	ID16(1200, 1148, BUS100),
	ID16(1000, 1100, BUS100),
	ID16( 800, 1052, BUS100),
	ID16( 600,  988, BUS100),
};

/* Intel Pentium M processor 770 2.13 GHz */
static const u_int16_t pm90_n770[] = {
	ID16(2133, 1356, BUS133),
	ID16(1867, 1292, BUS133),
	ID16(1600, 1212, BUS133),
	ID16(1333, 1148, BUS133),
	ID16(1067, 1068, BUS133),
	ID16( 800,  988, BUS133),
};

/*
 * VIA C7-M 500 MHz FSB, 400 MHz FSB, and ULV variants.
 * Data from the "VIA C7-M Processor BIOS Writer's Guide (v2.17)" datasheet.
 */

/* 1.00GHz Centaur C7-M ULV */
static const u_int16_t C7M_770_ULV[] = {
	ID16(1000,  844, BUS100),
	ID16( 800,  796, BUS100),
	ID16( 600,  796, BUS100),
	ID16( 400,  796, BUS100),
};

/* 1.00GHz Centaur C7-M ULV */
static const u_int16_t C7M_779_ULV[] = {
	ID16(1000,  796, BUS100),
	ID16( 800,  796, BUS100),
	ID16( 600,  796, BUS100),
	ID16( 400,  796, BUS100),
};

/* 1.20GHz Centaur C7-M ULV */
static const u_int16_t C7M_772_ULV[] = {
	ID16(1200,  844, BUS100),
	ID16(1000,  844, BUS100),
	ID16( 800,  828, BUS100),
	ID16( 600,  796, BUS100),
	ID16( 400,  796, BUS100),
};

/* 1.50GHz Centaur C7-M ULV */
static const u_int16_t C7M_775_ULV[] = {
	ID16(1500,  956, BUS100),
	ID16(1400,  940, BUS100),
	ID16(1000,  860, BUS100),
	ID16( 800,  828, BUS100),
	ID16( 600,  796, BUS100),
	ID16( 400,  796, BUS100),
};

/* 1.20GHz Centaur C7-M 400 MHz FSB */
static const u_int16_t C7M_771[] = {
	ID16(1200,  860, BUS100),
	ID16(1000,  860, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  844, BUS100),
	ID16( 400,  844, BUS100),
};

/* 1.50GHz Centaur C7-M 400 MHz FSB */
static const u_int16_t C7M_754[] = {
	ID16(1500, 1004, BUS100),
	ID16(1400,  988, BUS100),
	ID16(1000,  940, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  844, BUS100),
	ID16( 400,  844, BUS100),
};

/* 1.60GHz Centaur C7-M 400 MHz FSB */
static const u_int16_t C7M_764[] = {
	ID16(1600, 1084, BUS100),
	ID16(1400, 1052, BUS100),
	ID16(1000, 1004, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  844, BUS100),
	ID16( 400,  844, BUS100),
};

/* 1.80GHz Centaur C7-M 400 MHz FSB */
static const u_int16_t C7M_784[] = {
	ID16(1800, 1148, BUS100),
	ID16(1600, 1100, BUS100),
	ID16(1400, 1052, BUS100),
	ID16(1000, 1004, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  844, BUS100),
	ID16( 400,  844, BUS100),
};

/* 2.00GHz Centaur C7-M 400 MHz FSB */
static const u_int16_t C7M_794[] = {
	ID16(2000, 1148, BUS100),
	ID16(1800, 1132, BUS100),
	ID16(1600, 1100, BUS100),
	ID16(1400, 1052, BUS100),
	ID16(1000, 1004, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  844, BUS100),
	ID16( 400,  844, BUS100),
};

/* 1.60GHz Centaur C7-M 533 MHz FSB */
static const u_int16_t C7M_765[] = {
	ID16(1600, 1084, BUS133),
	ID16(1467, 1052, BUS133),
	ID16(1200, 1004, BUS133),
	ID16( 800,  844, BUS133),
	ID16( 667,  844, BUS133),
	ID16( 533,  844, BUS133),
};

/* 2.00GHz Centaur C7-M 533 MHz FSB */
static const u_int16_t C7M_785[] = {
	ID16(1867, 1148, BUS133),
	ID16(1600, 1100, BUS133),
	ID16(1467, 1052, BUS133),
	ID16(1200, 1004, BUS133),
	ID16( 800,  844, BUS133),
	ID16( 667,  844, BUS133),
	ID16( 533,  844, BUS133),
};

/* 2.00GHz Centaur C7-M 533 MHz FSB */
static const u_int16_t C7M_795[] = {
	ID16(2000, 1148, BUS133),
	ID16(1867, 1132, BUS133),
	ID16(1600, 1100, BUS133),
	ID16(1467, 1052, BUS133),
	ID16(1200, 1004, BUS133),
	ID16( 800,  844, BUS133),
	ID16( 667,  844, BUS133),
	ID16( 533,  844, BUS133),
};

/* 1.00GHz VIA Eden 90nm 'Esther' */
static const u_int16_t eden90_1000[] = {
	ID16(1000,  844, BUS100),
	ID16( 800,  844, BUS100),
	ID16( 600,  844, BUS100),
	ID16( 400,  844, BUS100),
};

struct fqlist {
	int vendor : 5;
	unsigned bus_clk : 1;
	unsigned n : 5;
	const u_int16_t *table;
};

#define NELEM(x) (sizeof(x) / sizeof((x)[0]))

#define ENTRY(ven, bus_clk, tab) \
	{ CPUVENDOR_##ven, bus_clk == BUS133 ? 1 : 0, NELEM(tab), tab }

#define BUS_CLK(fqp) ((fqp)->bus_clk ? BUS133 : BUS100)

static const struct fqlist est_cpus[] = {
	ENTRY(INTEL, BUS100, pm130_900_ulv),
	ENTRY(INTEL, BUS100, pm130_1000_ulv),
	ENTRY(INTEL, BUS100, pm130_1100_ulv),
	ENTRY(INTEL, BUS100, pm130_1100_lv),
	ENTRY(INTEL, BUS100, pm130_1200_lv),
	ENTRY(INTEL, BUS100, pm130_1300_lv),
	ENTRY(INTEL, BUS100, pm130_1300),
	ENTRY(INTEL, BUS100, pm130_1400),
	ENTRY(INTEL, BUS100, pm130_1500),
	ENTRY(INTEL, BUS100, pm130_1600),
	ENTRY(INTEL, BUS100, pm130_1700),

	ENTRY(INTEL, BUS100, pm90_n723),
	ENTRY(INTEL, BUS100, pm90_n733g),
	ENTRY(INTEL, BUS100, pm90_n733h),
	ENTRY(INTEL, BUS100, pm90_n733i),
	ENTRY(INTEL, BUS100, pm90_n733j),
	ENTRY(INTEL, BUS100, pm90_n733k),
	ENTRY(INTEL, BUS100, pm90_n733l),
	ENTRY(INTEL, BUS100, pm90_n753g),
	ENTRY(INTEL, BUS100, pm90_n753h),
	ENTRY(INTEL, BUS100, pm90_n753i),
	ENTRY(INTEL, BUS100, pm90_n753j),
	ENTRY(INTEL, BUS100, pm90_n753k),
	ENTRY(INTEL, BUS100, pm90_n753l),
	ENTRY(INTEL, BUS100, pm90_n773g),
	ENTRY(INTEL, BUS100, pm90_n773h),
	ENTRY(INTEL, BUS100, pm90_n773i),
	ENTRY(INTEL, BUS100, pm90_n773j),
	ENTRY(INTEL, BUS100, pm90_n773k),
	ENTRY(INTEL, BUS100, pm90_n773l),
	ENTRY(INTEL, BUS100, pm90_n738),
	ENTRY(INTEL, BUS100, pm90_n758),
	ENTRY(INTEL, BUS100, pm90_n778),

	ENTRY(INTEL, BUS133, pm90_n710),
	ENTRY(INTEL, BUS100, pm90_n715a),
	ENTRY(INTEL, BUS100, pm90_n715b),
	ENTRY(INTEL, BUS100, pm90_n715c),
	ENTRY(INTEL, BUS100, pm90_n715d),
	ENTRY(INTEL, BUS100, pm90_n725a),
	ENTRY(INTEL, BUS100, pm90_n725b),
	ENTRY(INTEL, BUS100, pm90_n725c),
	ENTRY(INTEL, BUS100, pm90_n725d),
	ENTRY(INTEL, BUS133, pm90_n730),
	ENTRY(INTEL, BUS100, pm90_n735a),
	ENTRY(INTEL, BUS100, pm90_n735b),
	ENTRY(INTEL, BUS100, pm90_n735c),
	ENTRY(INTEL, BUS100, pm90_n735d),
	ENTRY(INTEL, BUS133, pm90_n740),
	ENTRY(INTEL, BUS100, pm90_n745a),
	ENTRY(INTEL, BUS100, pm90_n745b),
	ENTRY(INTEL, BUS100, pm90_n745c),
	ENTRY(INTEL, BUS100, pm90_n745d),
	ENTRY(INTEL, BUS133, pm90_n750),
	ENTRY(INTEL, BUS100, pm90_n755a),
	ENTRY(INTEL, BUS100, pm90_n755b),
	ENTRY(INTEL, BUS100, pm90_n755c),
	ENTRY(INTEL, BUS100, pm90_n755d),
	ENTRY(INTEL, BUS133, pm90_n760),
	ENTRY(INTEL, BUS100, pm90_n765a),
	ENTRY(INTEL, BUS100, pm90_n765b),
	ENTRY(INTEL, BUS100, pm90_n765c),
	ENTRY(INTEL, BUS100, pm90_n765e),
	ENTRY(INTEL, BUS133, pm90_n770),

	ENTRY(VIA,   BUS100, C7M_770_ULV),
	ENTRY(VIA,   BUS100, C7M_779_ULV),
	ENTRY(VIA,   BUS100, C7M_772_ULV),
	ENTRY(VIA,   BUS100, C7M_771),
	ENTRY(VIA,   BUS100, C7M_775_ULV),
	ENTRY(VIA,   BUS100, C7M_754),
	ENTRY(VIA,   BUS100, C7M_764),
	ENTRY(VIA,   BUS133, C7M_765),
	ENTRY(VIA,   BUS100, C7M_784),
	ENTRY(VIA,   BUS133, C7M_785),
	ENTRY(VIA,   BUS100, C7M_794),
	ENTRY(VIA,   BUS133, C7M_795),

	ENTRY(VIA,   BUS100, eden90_1000),
};


#define MSR2MHZ(msr, bus) \
	(((((int) (msr) >> 8) & 0xff) * (bus) + 50) / 100)
#define MSR2MV(msr) \
	(((int) (msr) & 0xff) * 16 + 700)

static const struct fqlist *est_fqlist;

static u_int16_t fake_table[3];
static struct fqlist fake_fqlist;

extern int setperf_prio;
extern int perflevel;

void
est_init(const char *cpu_device, int vendor)
{
	int i, mhz, mv, low, high;
	u_int64_t msr;
	u_int16_t idhi, idlo, cur;
	u_int8_t crhi, crlo, crcur;
	const struct fqlist *fql;

	if (setperf_prio > 3)
		return;

	if ((cpu_ecxfeature & CPUIDECX_EST) == 0)
		return;

	if (bus_clock == 0) {
		printf("%s: EST: unknown system bus clock\n", cpu_device);
		return;
	}

	msr = rdmsr(MSR_PERF_STATUS);
	idhi = (msr >> 32) & 0xffff;
	idlo = (msr >> 48) & 0xffff;
	cur = msr & 0xffff;
	crhi = (idhi  >> 8) & 0xff;
	crlo = (idlo  >> 8) & 0xff;
	crcur = (cur >> 8) & 0xff;
	if (crlo == 0 || crhi == crlo) {
		/*
		 * Don't complain about these cases, and silently disable EST:
		 * - A lowest clock ratio of 0, which seems to happen on all
		 *   Pentium 4's that report EST.
		 * - An equal highest and lowest clock ratio, which happens on
		 *   at least the Core 2 Duo X6800, maybe on newer models too.
		 */
		return;
	}
	if (crhi == 0 || crcur == 0 || crlo > crhi ||
	    crcur < crlo || crcur > crhi) {
		/*
		 * Do complain about other weirdness, because we first want to
		 * know about it, before we decide what to do with it.
		 */
		printf("%s: EST: strange msr value 0x%016llx\n",
		    cpu_device, msr);
		return;
	}
	/*
	 * Find an entry which matches (vendor, bus_clock, idhi, idlo)
	 */
	for (i = 0; i < NELEM(est_cpus); i++) {
		fql = &est_cpus[i];
		if (vendor == fql->vendor && bus_clock == BUS_CLK(fql) &&
		    idhi == fql->table[0] && idlo == fql->table[fql->n - 1]) {
			est_fqlist = fql;
			break;
		}
	}
	if (est_fqlist == NULL) {
		printf("%s: unknown Enhanced SpeedStep CPU, msr 0x%016llx\n",
		    cpu_device, msr);

		/*
		 * Generate a fake table with the power states we know.
		 */
		fake_table[0] = idhi;
		if (cur == idhi || cur == idlo) {
			printf("%s: using only highest and lowest power "
			    "states\n", cpu_device);

			fake_table[1] = idlo;
			fake_fqlist.n = 2;
		} else {
			printf("%s: using only highest, current and lowest "
			    "power states\n", cpu_device);

			fake_table[1] = cur;
			fake_table[2] = idlo;
			fake_fqlist.n = 3;
		}
		fake_fqlist.vendor = vendor;
		fake_fqlist.table = fake_table;
		est_fqlist = &fake_fqlist;
	}

	mhz = MSR2MHZ(cur, bus_clock);
	mv = MSR2MV(cur);
	printf("%s: Enhanced SpeedStep %d MHz (%d mV)", cpu_device, mhz, mv);

	/*
	 * Check that the current operating point is in our list.
	 */
	for (i = est_fqlist->n - 1; i >= 0; i--) {
		if (cur == est_fqlist->table[i])
			break;
	}
	if (i < 0) {
		printf(" (not in table, msr 0x%016llx)\n", msr);
		return;
	}
	low = MSR2MHZ(est_fqlist->table[est_fqlist->n - 1], bus_clock);
	high = MSR2MHZ(est_fqlist->table[0], bus_clock);
	perflevel = (mhz - low) * 100 / (high - low);

	/*
	 * OK, tell the user the available frequencies.
	 */
	printf(": speeds: ");
	for (i = 0; i < est_fqlist->n; i++)
		printf("%d%s", MSR2MHZ(est_fqlist->table[i], bus_clock),
		    i < est_fqlist->n - 1 ? ", " : " MHz\n");

	cpu_setperf = est_setperf;
	setperf_prio = 3;
}

void
est_setperf(int level)
{
	int i;
	uint64_t msr;

	if (est_fqlist == NULL)
		return;

	i = ((level * est_fqlist->n) + 1) / 101;
	if (i >= est_fqlist->n)
		i = est_fqlist->n - 1;
	i = est_fqlist->n - 1 - i;

	msr = rdmsr(MSR_PERF_CTL);
	msr &= ~0xffffULL;
	msr |= est_fqlist->table[i];
	wrmsr(MSR_PERF_CTL, msr);
	cpuspeed = MSR2MHZ(est_fqlist->table[i], bus_clock);
}