1 /* $NetBSD: viac7temp.c,v 1.2 2010/03/14 18:04:29 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 Jared D. McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: viac7temp.c,v 1.2 2010/03/14 18:04:29 pgoyette Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/kmem.h> 34 #include <sys/xcall.h> 35 #include <sys/cpu.h> 36 #include <sys/device.h> 37 38 #include <dev/sysmon/sysmonvar.h> 39 40 #include <machine/cpuvar.h> 41 #include <machine/specialreg.h> 42 #include <machine/cpufunc.h> 43 44 struct viac7temp_softc { 45 struct cpu_info *sc_ci; 46 struct sysmon_envsys *sc_sme; 47 envsys_data_t sc_sensor; 48 }; 49 50 static void viac7temp_refresh(struct sysmon_envsys *, envsys_data_t *); 51 static void viac7temp_refresh_xcall(void *, void *); 52 53 void 54 viac7temp_register(struct cpu_info *ci) 55 { 56 struct viac7temp_softc *sc; 57 58 sc = kmem_zalloc(sizeof(struct viac7temp_softc), KM_SLEEP); 59 60 sc->sc_sensor.units = ENVSYS_STEMP; 61 sc->sc_sensor.flags = ENVSYS_FMONLIMITS; 62 strlcpy(sc->sc_sensor.desc, "temperature", 63 sizeof(sc->sc_sensor.desc)); 64 65 sc->sc_sme = sysmon_envsys_create(); 66 if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor)) { 67 sysmon_envsys_destroy(sc->sc_sme); 68 goto bad; 69 } 70 71 /* 72 * Hook into the system monitor. 73 */ 74 sc->sc_sme->sme_name = device_xname(ci->ci_dev); 75 sc->sc_sme->sme_cookie = sc; 76 sc->sc_sme->sme_refresh = viac7temp_refresh; 77 78 if (sysmon_envsys_register(sc->sc_sme)) { 79 aprint_error_dev(ci->ci_dev, 80 "unable to register with sysmon\n"); 81 sysmon_envsys_destroy(sc->sc_sme); 82 goto bad; 83 } 84 85 return; 86 87 bad: 88 kmem_free(sc, sizeof(struct viac7temp_softc)); 89 } 90 91 static void 92 viac7temp_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 93 { 94 struct viac7temp_softc *sc = sme->sme_cookie; 95 uint64_t where; 96 97 where = xc_unicast(0, viac7temp_refresh_xcall, sc, edata, sc->sc_ci); 98 xc_wait(where); 99 } 100 101 static void 102 viac7temp_refresh_xcall(void *arg0, void *arg1) 103 { 104 /* struct viac7temp_softc *sc = (struct viac7temp_softc *)arg0; */ 105 envsys_data_t *edata = (envsys_data_t *)arg1; 106 uint32_t descs[4]; 107 108 x86_cpuid(0xc0000002, descs); 109 110 edata->value_cur = descs[0] >> 8; 111 edata->value_cur *= 1000000; 112 edata->value_cur += 273150000; 113 edata->state = ENVSYS_SVALID; 114 } 115