/* $OpenBSD: pchb.c,v 1.12 2000/05/01 19:34:22 deraadt Exp $ */ /* $NetBSD: pchb.c,v 1.6 1997/06/06 23:29:16 thorpej Exp $ */ /* * Copyright (c) 2000 Michael Shalayeff * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Michael Shalayeff. * 4. 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 OR HIS RELATIVES 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 MIND, 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. */ /*- * Copyright (c) 1996 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * 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 #include #include #include #include #include #include #define PCISET_INTEL_BRIDGETYPE_MASK 0x3 #define PCISET_INTEL_TYPE_COMPAT 0x1 #define PCISET_INTEL_TYPE_AUX 0x2 #define PCISET_INTEL_BUSCONFIG_REG 0x48 #define PCISET_INTEL_BRIDGE_NUMBER(reg) (((reg) >> 8) & 0xff) #define PCISET_INTEL_PCI_BUS_NUMBER(reg) (((reg) >> 16) & 0xff) #define PCISET_INTEL_SDRAMC_REG 0x76 #define PCISET_INTEL_SDRAMC_IPDLT (1 << 8) /* XXX should be in dev/ic/i82424{reg.var}.h */ #define I82424_CPU_BCTL_REG 0x53 #define I82424_PCI_BCTL_REG 0x54 #define I82424_BCTL_CPUMEM_POSTEN 0x01 #define I82424_BCTL_CPUPCI_POSTEN 0x02 #define I82424_BCTL_PCIMEM_BURSTEN 0x01 #define I82424_BCTL_PCI_BURSTEN 0x02 struct pchb_softc { struct device sc_dev; bus_space_tag_t bt; bus_space_handle_t bh; /* rng stuff */ int ax; int i; struct timeout sc_tmo; }; int pchbmatch __P((struct device *, void *, void *)); void pchbattach __P((struct device *, struct device *, void *)); int pchb_print __P((void *, const char *)); struct cfattach pchb_ca = { sizeof(struct pchb_softc), pchbmatch, pchbattach }; struct cfdriver pchb_cd = { NULL, "pchb", DV_DULL }; void pchb_rnd __P((void *v)); int pchbmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct pci_attach_args *pa = aux; if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_HOST) return (1); return (0); } void pchbattach(parent, self, aux) struct device *parent, *self; void *aux; { struct pchb_softc *sc = (struct pchb_softc *)self; struct pci_attach_args *pa = aux; struct pcibus_attach_args pba; pcireg_t bcreg; u_char bdnum, pbnum; int neednl = 1; int i; /* * Print out a description, and configure certain chipsets which * have auxiliary PCI buses. */ switch (PCI_VENDOR(pa->pa_id)) { case PCI_VENDOR_RCC: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_RCC_ROSB4: case PCI_PRODUCT_RCC_CNB20HE: case PCI_PRODUCT_RCC_CNB20LE: case PCI_PRODUCT_RCC_CMIC_HE: bdnum = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x44); if (bdnum == 0) break; /* * This host bridge has a second PCI bus. * Configure it. */ printf(": has pci bus %d\n", bdnum); neednl = 0; pba.pba_busname = "pci"; pba.pba_iot = pa->pa_iot; pba.pba_memt = pa->pa_memt; pba.pba_dmat = pa->pa_dmat; pba.pba_bus = bdnum; pba.pba_pc = pa->pa_pc; config_found(self, &pba, pchb_print); break; } break; case PCI_VENDOR_INTEL: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_INTEL_82443BX_AGP: /* 82443BX AGP (PAC) */ case PCI_PRODUCT_INTEL_82443BX_NOAGP: /* 82443BX Host-PCI (no AGP) */ /* * An incorrect address may be driven on the * DRAM bus, resulting in memory data being * fetched from the wrong location. This is * the workaround. */ bcreg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCISET_INTEL_SDRAMC_REG); bcreg |= PCISET_INTEL_SDRAMC_IPDLT; pci_conf_write(pa->pa_pc, pa->pa_tag, PCISET_INTEL_SDRAMC_REG, bcreg); break; case PCI_PRODUCT_INTEL_PCI450_PB: bcreg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCISET_INTEL_BUSCONFIG_REG); bdnum = PCISET_INTEL_BRIDGE_NUMBER(bcreg); pbnum = PCISET_INTEL_PCI_BUS_NUMBER(bcreg); switch (bdnum & PCISET_INTEL_BRIDGETYPE_MASK) { default: printf(": bdnum=%x (reserved)", bdnum); break; case PCISET_INTEL_TYPE_COMPAT: printf(": Compatibility PB (bus %d)", pbnum); break; case PCISET_INTEL_TYPE_AUX: printf(": Auxiliary PB (bus %d)\n", pbnum); neednl = 0; /* * This host bridge has a second PCI bus. * Configure it. */ pba.pba_busname = "pci"; pba.pba_iot = pa->pa_iot; pba.pba_memt = pa->pa_memt; pba.pba_dmat = pa->pa_dmat; pba.pba_bus = pbnum; pba.pba_pc = pa->pa_pc; config_found(self, &pba, pchb_print); break; } break; case PCI_PRODUCT_INTEL_CDC: bcreg = pci_conf_read(pa->pa_pc, pa->pa_tag, I82424_CPU_BCTL_REG); if (bcreg & I82424_BCTL_CPUPCI_POSTEN) { bcreg &= ~I82424_BCTL_CPUPCI_POSTEN; pci_conf_write(pa->pa_pc, pa->pa_tag, I82424_CPU_BCTL_REG, bcreg); printf(": disabled CPU-PCI write posting"); } break; case PCI_PRODUCT_INTEL_82810E_MCH: sc->bt = pa->pa_memt; if (bus_space_map(sc->bt, I82802_IOBASE, I82802_IOSIZE, 0, &sc->bh) < 0) break; /* probe and init rng */ if (bus_space_read_1(sc->bt, sc->bh, I82802_RNG_HWST) & I82802_RNG_HWST_PRESENT) { int r; /* enable RNG */ bus_space_write_1(sc->bt, sc->bh, I82802_RNG_HWST, bus_space_read_1(sc->bt, sc->bh, I82802_RNG_HWST) | I82802_RNG_HWST_ENABLE); /* * see if we can read anything, * and it passed the test */ for (i = 1000; i-- && !(bus_space_read_1(sc->bt, sc->bh, I82802_RNG_RNGST) & I82802_RNG_RNGST_DATAV); DELAY(10)); if (bus_space_read_1(sc->bt, sc->bh, I82802_RNG_RNGST) & I82802_RNG_RNGST_DATAV && (r = bus_space_read_1(sc->bt, sc->bh, I82802_RNG_DATA)) != 0 /*&& runfipstest()>=0*/) { printf (": RNG(%x)", r); sc->i = 4; timeout_set(&sc->sc_tmo, pchb_rnd, sc); timeout_add(&sc->sc_tmo, 1); } } break; default: break; } } if (neednl) printf("\n"); } int pchb_print(aux, pnp) void *aux; const char *pnp; { struct pcibus_attach_args *pba = aux; if (pnp) printf("%s at %s", pba->pba_busname, pnp); printf(" bus %d", pba->pba_bus); return (UNCONF); } void pchb_rnd(v) void *v; { struct pchb_softc *sc = v; int s, ret = -1; s = splhigh(); if (bus_space_read_1(sc->bt, sc->bh, I82802_RNG_RNGST) & I82802_RNG_RNGST_DATAV) ret = bus_space_read_1(sc->bt, sc->bh, I82802_RNG_DATA); splx(s); if (ret >= 0) { if (sc->i--) sc->ax = (sc->ax << 8) + ret; else { sc->i = 4; add_true_randomness(sc->ax); } } timeout_add(&sc->sc_tmo, 1); }