geodecntr.c revision 1.2.14.2
1 1.2.14.2 yamt /* $NetBSD: geodecntr.c,v 1.2.14.2 2006/12/10 07:16:12 yamt Exp $ */ 2 1.2 kardel 3 1.2 kardel /*- 4 1.2 kardel * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 1.2 kardel * All rights reserved. 6 1.2 kardel * 7 1.2 kardel * This code is derived from software contributed to The NetBSD Foundation 8 1.2 kardel * by Frank Kardel inspired from the patches to FreeBSD by Poul Henning Kamp 9 1.2 kardel * 10 1.2 kardel * Redistribution and use in source and binary forms, with or without 11 1.2 kardel * modification, are permitted provided that the following conditions 12 1.2 kardel * are met: 13 1.2 kardel * 1. Redistributions of source code must retain the above copyright 14 1.2 kardel * notice, this list of conditions and the following disclaimer. 15 1.2 kardel * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 kardel * notice, this list of conditions and the following disclaimer in the 17 1.2 kardel * documentation and/or other materials provided with the distribution. 18 1.2 kardel * 3. All advertising materials mentioning features or use of this software 19 1.2 kardel * must display the following acknowledgement: 20 1.2 kardel * This product includes software developed by the NetBSD 21 1.2 kardel * Foundation, Inc. and its contributors. 22 1.2 kardel * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2 kardel * contributors may be used to endorse or promote products derived 24 1.2 kardel * from this software without specific prior written permission. 25 1.2 kardel * 26 1.2 kardel * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2 kardel * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2 kardel * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2 kardel * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2 kardel * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2 kardel * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2 kardel * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2 kardel * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2 kardel * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2 kardel * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2 kardel * POSSIBILITY OF SUCH DAMAGE. 37 1.2 kardel */ 38 1.2 kardel 39 1.2 kardel #include <sys/cdefs.h> 40 1.2.14.2 yamt __KERNEL_RCSID(0, "$NetBSD: geodecntr.c,v 1.2.14.2 2006/12/10 07:16:12 yamt Exp $"); 41 1.2 kardel 42 1.2 kardel #include <sys/param.h> 43 1.2 kardel #include <sys/systm.h> 44 1.2 kardel #include <sys/kernel.h> 45 1.2 kardel #include <sys/device.h> 46 1.2 kardel #include <machine/cpu.h> 47 1.2 kardel #include <sys/timetc.h> 48 1.2 kardel #include <machine/bus.h> 49 1.2 kardel #include <arch/i386/pci/geodevar.h> 50 1.2 kardel #include <arch/i386/pci/geodereg.h> 51 1.2 kardel 52 1.2 kardel struct geodecntr_softc { 53 1.2 kardel struct device sc_dev; 54 1.2 kardel struct geode_gcb_softc *sc_gcb_dev; 55 1.2 kardel struct timecounter sc_tc; 56 1.2 kardel }; 57 1.2 kardel 58 1.2 kardel static unsigned geode_get_timecount(struct timecounter *); 59 1.2 kardel 60 1.2 kardel static int attached = 0; 61 1.2 kardel 62 1.2 kardel static int 63 1.2.14.2 yamt geodecntr_match(struct device *parent, struct cfdata *match, 64 1.2.14.2 yamt void *aux) 65 1.2 kardel { 66 1.2 kardel return !attached; 67 1.2 kardel } 68 1.2 kardel 69 1.2 kardel /* 70 1.2 kardel * attach time counter 71 1.2 kardel */ 72 1.2 kardel static void 73 1.2.14.2 yamt geodecntr_attach(struct device *parent, struct device *self, void *aux) 74 1.2 kardel { 75 1.2 kardel struct geodecntr_softc *sc = (struct geodecntr_softc *) self; 76 1.2 kardel 77 1.2 kardel aprint_normal(": AMD Geode SC1100 27Mhz Counter\n"); 78 1.2 kardel 79 1.2 kardel sc->sc_gcb_dev = (struct geode_gcb_softc *)parent; 80 1.2 kardel 81 1.2 kardel /* 82 1.2 kardel * select 27MHz, no powerdown, no interrupt 83 1.2 kardel */ 84 1.2 kardel bus_space_write_1(sc->sc_gcb_dev->sc_iot, sc->sc_gcb_dev->sc_ioh, 85 1.2 kardel SC1100_GCB_TMCNFG_B, SC1100_TMCNFG_TMCLKSEL); 86 1.2 kardel 87 1.2 kardel memset(&sc->sc_tc, 0, sizeof(sc->sc_tc)); 88 1.2 kardel 89 1.2 kardel sc->sc_tc.tc_get_timecount = geode_get_timecount; 90 1.2 kardel sc->sc_tc.tc_poll_pps = NULL; 91 1.2 kardel sc->sc_tc.tc_counter_mask = 0xffffffff; 92 1.2 kardel sc->sc_tc.tc_frequency = 27000000; 93 1.2 kardel sc->sc_tc.tc_name = "geodecounter"; 94 1.2 kardel sc->sc_tc.tc_priv = sc; 95 1.2 kardel sc->sc_tc.tc_quality = 1000; 96 1.2 kardel 97 1.2 kardel tc_init(&sc->sc_tc); 98 1.2 kardel 99 1.2 kardel attached = 1; 100 1.2 kardel } 101 1.2 kardel 102 1.2 kardel /* 103 1.2 kardel * read counter 104 1.2 kardel */ 105 1.2 kardel static unsigned geode_get_timecount(struct timecounter *tc) 106 1.2 kardel { 107 1.2 kardel struct geodecntr_softc *sc = (struct geodecntr_softc *)tc->tc_priv; 108 1.2 kardel 109 1.2 kardel return bus_space_read_4(sc->sc_gcb_dev->sc_iot, sc->sc_gcb_dev->sc_ioh, SC1100_GCB_TMVALUE_L); 110 1.2 kardel } 111 1.2 kardel 112 1.2 kardel CFATTACH_DECL(geodecntr, sizeof(struct geodecntr_softc), 113 1.2 kardel geodecntr_match, geodecntr_attach, NULL, NULL); 114 1.2 kardel 115
Indexes created Tue Oct 28 02:10:10 GMT 2025