/* $OpenBSD: pchb.c,v 1.49 2005/06/14 20:35:45 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. * * 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 0x74 #define PCISET_INTEL_SDRAMC_IPDLT (1 << 24) /* 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(struct device *, void *, void *); void pchbattach(struct device *, struct device *, void *); int pchb_print(void *, const char *); struct cfattach pchb_ca = { sizeof(struct pchb_softc), pchbmatch, pchbattach }; struct cfdriver pchb_cd = { NULL, "pchb", DV_DULL }; void pchb_rnd(void *v); const struct pci_matchid via_devices[] = { { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C586_PWR }, { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C596 }, { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C596B_PM }, { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C686A_SMB } }; int pchbmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct pci_attach_args *pa = aux; /* XXX work around broken via82x866 chipsets */ if (pci_matchbyid(pa, via_devices, sizeof(via_devices) / sizeof(via_devices[0]))) return (0); if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_HOST) return (1); return (0); } /* * The variable below is a bit vector representing the Serverworks * busses that have already been attached. Bit 0 represents bus 0 and * so forth. The initial value is 1 because we never actually want to * attach bus 0 since bus 0 is the mainbus. */ u_int32_t rcc_bus_visited = 1; 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; struct timeval tv1, tv2; pcireg_t bcreg; u_char bdnum, pbnum; pcitag_t tag; int neednl = 1; int i, r; /* * Print out a description, and configure certain chipsets which * have auxiliary PCI buses. */ switch (PCI_VENDOR(pa->pa_id)) { #ifdef PCIAGP case PCI_VENDOR_ALI: case PCI_VENDOR_SIS: case PCI_VENDOR_VIATECH: pciagp_set_pchb(pa); break; case PCI_VENDOR_AMD: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_AMD_SC751_SC: case PCI_PRODUCT_AMD_762_PCHB: pciagp_set_pchb(pa); break; } break; #endif case PCI_VENDOR_RCC: bdnum = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x44); if (bdnum >= (sizeof(rcc_bus_visited) * 8) || (rcc_bus_visited & (1 << bdnum))) break; rcc_bus_visited |= 1 << bdnum; /* * This host bridge has a second PCI bus. * Configure it. */ 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; printf("\n"); config_found(self, &pba, pchb_print); break; case PCI_VENDOR_INTEL: #ifdef PCIAGP pciagp_set_pchb(pa); #endif 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. */ if (PCI_REVISION(pa->pa_class) < 0x3) { 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; printf("\n"); config_found(self, &pba, pchb_print); break; } break; case PCI_PRODUCT_INTEL_82454NX: pbnum = 0; switch (pa->pa_device) { case 18: /* PXB 0 bus A - primary bus */ break; case 19: /* PXB 0 bus B */ /* read SUBA0 from MIOC */ tag = pci_make_tag(pa->pa_pc, 0, 16, 0); bcreg = pci_conf_read(pa->pa_pc, tag, 0xd0); pbnum = ((bcreg & 0x0000ff00) >> 8) + 1; break; case 20: /* PXB 1 bus A */ /* read BUSNO1 from MIOC */ tag = pci_make_tag(pa->pa_pc, 0, 16, 0); bcreg = pci_conf_read(pa->pa_pc, tag, 0xd0); pbnum = (bcreg & 0xff000000) >> 24; break; case 21: /* PXB 1 bus B */ /* read SUBA1 from MIOC */ tag = pci_make_tag(pa->pa_pc, 0, 16, 0); bcreg = pci_conf_read(pa->pa_pc, tag, 0xd4); pbnum = (bcreg & 0x000000ff) + 1; break; } if (pbnum != 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 = pbnum; pba.pba_pc = pa->pa_pc; printf("\n"); config_found(self, &pba, pchb_print); } 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_82810_MCH: case PCI_PRODUCT_INTEL_82810_DC100_MCH: case PCI_PRODUCT_INTEL_82810E_MCH: case PCI_PRODUCT_INTEL_82815_DC100_HUB: case PCI_PRODUCT_INTEL_82815_NOGRAPH_HUB: case PCI_PRODUCT_INTEL_82815_FULL_HUB: case PCI_PRODUCT_INTEL_82815_NOAGP_HUB: case PCI_PRODUCT_INTEL_82820_MCH: case PCI_PRODUCT_INTEL_82840_HB: case PCI_PRODUCT_INTEL_82850_HB: case PCI_PRODUCT_INTEL_82860_HB: sc->bt = pa->pa_memt; if (bus_space_map(sc->bt, I82802_IOBASE, I82802_IOSIZE, 0, &sc->bh)) break; /* probe and init rng */ if (!(bus_space_read_1(sc->bt, sc->bh, I82802_RNG_HWST) & I82802_RNG_HWST_PRESENT)) break; /* 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 */ 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)) break; r = bus_space_read_1(sc->bt, sc->bh, I82802_RNG_DATA); /* benchmark the RNG */ microtime(&tv1); for (i = 8 * 1024; i--; ) { while(!(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); } microtime(&tv2); timersub(&tv2, &tv1, &tv1); if (tv1.tv_sec) tv1.tv_usec += 1000000 * tv1.tv_sec; printf(": rng active"); if (tv1.tv_usec != 0) printf(", %dKb/sec", 8 * 1000000 / tv1.tv_usec); timeout_set(&sc->sc_tmo, pchb_rnd, sc); sc->i = 4; pchb_rnd(sc); 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); } /* * Should do FIPS testing as per: * http://csrc.nist.gov/publications/fips/fips140-1/fips1401.pdf */ void pchb_rnd(v) void *v; { struct pchb_softc *sc = v; /* * Don't wait for data to be ready. If it's not there, we'll check * next time. */ if ((bus_space_read_1(sc->bt, sc->bh, I82802_RNG_RNGST) & I82802_RNG_RNGST_DATAV)) { sc->ax = (sc->ax << 8) | bus_space_read_1(sc->bt, sc->bh, I82802_RNG_DATA); if (!sc->i--) { sc->i = 4; add_true_randomness(sc->ax); } } timeout_add(&sc->sc_tmo, 1); }