/* $OpenBSD: amdpm.c,v 1.4 2004/07/28 17:15:12 tholo Exp $ */ /*- * Copyright (c) 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Enami Tsugutomo. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ #include #include #include #include #include #ifdef __HAVE_TIMECOUNTER #include #endif #include #include #include #include #include #ifdef __HAVE_TIMECOUNTER unsigned amdpm_get_timecount(struct timecounter *tc); #ifndef AMDPM_FREQUENCY #define AMDPM_FREQUENCY 3579545 #endif static struct timecounter amdpm_timecounter = { amdpm_get_timecount, /* get_timecount */ 0, /* no poll_pps */ 0xffffff, /* counter_mask */ AMDPM_FREQUENCY, /* frequency */ "AMDPM", /* name */ 1000 /* quality */ }; #endif struct amdpm_softc { struct device sc_dev; pci_chipset_tag_t sc_pc; pcitag_t sc_tag; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; /* PMxx space */ struct timeout sc_rnd_ch; #ifdef AMDPM_RND_COUNTERS struct evcnt sc_rnd_hits; struct evcnt sc_rnd_miss; struct evcnt sc_rnd_data[256]; #endif }; int amdpm_match(struct device *, void *, void *); void amdpm_attach(struct device *, struct device *, void *); void amdpm_rnd_callout(void *); struct cfattach amdpm_ca = { sizeof(struct amdpm_softc), amdpm_match, amdpm_attach }; struct cfdriver amdpm_cd = { NULL, "amdpm", DV_DULL }; #ifdef AMDPM_RND_COUNTERS #define AMDPM_RNDCNT_INCR(ev) (ev)->ev_count++ #else #define AMDPM_RNDCNT_INCR(ev) /* nothing */ #endif int amdpm_match(struct device *parent, void *match, void *aux) { struct pci_attach_args *pa = aux; if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD && (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC768_PMC || PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_766_PMC)) return (1); return (0); } void amdpm_attach(struct device *parent, struct device *self, void *aux) { struct amdpm_softc *sc = (struct amdpm_softc *) self; struct pci_attach_args *pa = aux; struct timeval tv1, tv2; pcireg_t cfg_reg, reg; int i; sc->sc_pc = pa->pa_pc; sc->sc_tag = pa->pa_tag; sc->sc_iot = pa->pa_iot; cfg_reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); if ((cfg_reg & AMDPM_PMIOEN) == 0) { printf(": PMxx space isn't enabled\n"); return; } reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_PMPTR); if (bus_space_map(sc->sc_iot, AMDPM_PMBASE(reg), AMDPM_PMSIZE, 0, &sc->sc_ioh)) { printf(": failed to map PMxx space\n"); return; } #ifdef __HAVE_TIMECOUNTER if ((cfg_reg & AMDPM_TMRRST) == 0 && (cfg_reg & AMDPM_STOPTMR) == 0 && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC768_PMC) { printf(": %d-bit timer at %dHz", (cfg_reg & AMDPM_TMR32) ? 32 : 24, amdpm_timecounter.tc_frequency); amdpm_timecounter.tc_priv = sc; if (cfg_reg & AMDPM_TMR32) amdpm_timecounter.tc_counter_mask = 0xffffffffu; tc_init(&amdpm_timecounter); } #endif if (cfg_reg & AMDPM_RNGEN) { /* Check to see if we can read data from the RNG. */ (void) bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGDATA); /* benchmark the RNG */ microtime(&tv1); for (i = 2 * 1024; i--; ) { while(!(bus_space_read_1(sc->sc_iot, sc->sc_ioh, AMDPM_RNGSTAT) & AMDPM_RNGDONE)) ; (void) bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGDATA); } microtime(&tv2); timersub(&tv2, &tv1, &tv1); if (tv1.tv_sec) tv1.tv_usec += 1000000 * tv1.tv_sec; printf(": rng active, %dKb/sec", 8 * 1000000 / tv1.tv_usec); #ifdef AMDPM_RND_COUNTERS evcnt_attach_dynamic(&sc->sc_rnd_hits, EVCNT_TYPE_MISC, NULL, sc->sc_dev.dv_xname, "rnd hits"); evcnt_attach_dynamic(&sc->sc_rnd_miss, EVCNT_TYPE_MISC, NULL, sc->sc_dev.dv_xname, "rnd miss"); for (i = 0; i < 256; i++) { evcnt_attach_dynamic(&sc->sc_rnd_data[i], EVCNT_TYPE_MISC, NULL, sc->sc_dev.dv_xname, "rnd data"); } #endif timeout_set(&sc->sc_rnd_ch, amdpm_rnd_callout, sc); amdpm_rnd_callout(sc); } printf("\n"); } void amdpm_rnd_callout(void *v) { struct amdpm_softc *sc = v; u_int32_t reg; #ifdef AMDPM_RND_COUNTERS int i; #endif if ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGSTAT) & AMDPM_RNGDONE) != 0) { reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGDATA); add_true_randomness(reg); #ifdef AMDPM_RND_COUNTERS AMDPM_RNDCNT_INCR(&sc->sc_rnd_hits); for (i = 0; i < sizeof(reg); i++, reg >>= NBBY) AMDPM_RNDCNT_INCR(&sc->sc_rnd_data[reg & 0xff]); #endif } else AMDPM_RNDCNT_INCR(&sc->sc_rnd_miss); timeout_add(&sc->sc_rnd_ch, 1); } #ifdef __HAVE_TIMECOUNTER unsigned amdpm_get_timecount(struct timecounter *tc) { struct amdpm_softc *sc = tc->tc_priv; unsigned u2; #if 0 unsigned u1, u3; #endif u2 = bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_TMR); #if 0 u3 = bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_TMR); do { u1 = u2; u2 = u3; u3 = bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_TMR); } while (u1 > u2 || u2 > u3); #endif return (u2); } #endif