/* $NetBSD: autoconf.c,v 1.7.2.1 2009/02/23 08:32:53 snj Exp $ */ /* NetBSD: autoconf.c,v 1.75 2003/12/30 12:33:22 pk Exp */ /*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * 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. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)autoconf.c 7.1 (Berkeley) 5/9/91 */ /* * Setup the system to run on the current machine. * * Configure() is called at boot time and initializes the vba * device tables and the memory controller monitoring. Available * devices are determined (from possibilities mentioned in ioconf.c), * and the drivers are initialized. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.7.2.1 2009/02/23 08:32:53 snj Exp $"); #include "opt_xen.h" #include "opt_compat_oldboot.h" #include "opt_multiprocessor.h" #include "opt_nfs_boot.h" #include "xennet_hypervisor.h" #include "xennet_xenbus.h" #include <sys/param.h> #include <sys/systm.h> #include <sys/buf.h> #include <sys/disklabel.h> #include <sys/disk.h> #include <sys/conf.h> #ifdef COMPAT_OLDBOOT #include <sys/reboot.h> #endif #include <sys/device.h> #include <sys/malloc.h> #include <sys/vnode.h> #include <sys/fcntl.h> #include <sys/dkio.h> #include <sys/proc.h> #include <sys/user.h> #include <sys/kauth.h> #ifdef NFS_BOOT_BOOTSTATIC #include <net/if.h> #include <net/if_ether.h> #include <netinet/in.h> #include <nfs/rpcv2.h> #include <nfs/nfsproto.h> #include <nfs/nfs.h> #include <nfs/nfsmount.h> #include <nfs/nfsdiskless.h> #include <xen/if_xennetvar.h> #endif #include <machine/pte.h> #include <machine/cpu.h> #include <machine/gdt.h> #include <machine/pcb.h> #include <machine/bootinfo.h> static void findroot(void); static int is_valid_disk(device_t); static void handle_wedges(device_t, int); struct disklist *x86_alldisks; int x86_ndisks; #include "bios32.h" #if NBIOS32 > 0 #include <machine/bios32.h> #endif #include "opt_pcibios.h" #ifdef PCIBIOS #include <dev/pci/pcireg.h> #include <dev/pci/pcivar.h> #include <i386/pci/pcibios.h> #endif #include "opt_kvm86.h" #ifdef KVM86 #include <machine/kvm86.h> #endif /* * Determine i/o configuration for a machine. */ void cpu_configure(void) { startrtclock(); #if NBIOS32 > 0 && defined(DOM0OPS) #ifdef XEN3 if (xendomain_is_dom0()) #endif bios32_init(); #endif /* NBIOS32 > 0 && DOM0OPS */ #ifdef PCIBIOS pcibios_init(); #endif #ifdef KVM86 kvm86_init(); #endif if (config_rootfound("mainbus", NULL) == NULL) panic("configure: mainbus not configured"); #ifdef INTRDEBUG intr_printconfig(); #endif /* resync cr0 after FPU configuration */ lwp0.l_addr->u_pcb.pcb_cr0 = rcr0(); #ifdef MULTIPROCESSOR /* propagate this to the idle pcb's. */ cpu_init_idle_lwps(); #endif spl0(); } void cpu_rootconf(void) { findroot(); if (booted_wedge) { KASSERT(booted_device != NULL); printf("boot device: %s (%s)\n", device_xname(booted_wedge), device_xname(booted_device)); setroot(booted_wedge, 0); } else { printf("boot device: %s\n", booted_device ? device_xname(booted_device) : "<unknown>"); setroot(booted_device, booted_partition); } } /* * Attempt to find the device from which we were booted. * If we can do so, and not instructed not to do so, * change rootdev to correspond to the load device. */ void findroot(void) { device_t dv; union xen_cmdline_parseinfo xcp; if (booted_device) return; xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); TAILQ_FOREACH(dv, &alldevs, dv_list) { bool is_ifnet, is_disk; const char *devname; is_ifnet = (device_class(dv) == DV_IFNET); is_disk = is_valid_disk(dv); devname = device_xname(dv); if (!is_ifnet && !is_disk) continue; if (is_disk && xcp.xcp_bootdev[0] == 0) { handle_wedges(dv, 0); break; } if (strncmp(xcp.xcp_bootdev, devname, strlen(devname))) continue; if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) { booted_partition = toupper( xcp.xcp_bootdev[strlen(devname)]) - 'A'; } booted_device = dv; break; } } #include "pci.h" #include <dev/isa/isavar.h> #if NPCI > 0 #include <dev/pci/pcivar.h> #endif #if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS) static int dom0_bootstatic_callback(struct nfs_diskless *nd) { #if 0 struct ifnet *ifp = nd->nd_ifp; #endif int flags = 0; union xen_cmdline_parseinfo xcp; struct sockaddr_in *sin; memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */ xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); if (xcp.xcp_netinfo.xi_root[0] != '\0') { flags |= NFS_BOOT_HAS_SERVER; if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) flags |= NFS_BOOT_HAS_ROOTPATH; } nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; memset((void *)sin, 0, sizeof(*sin)); sin->sin_len = sizeof(*sin); sin->sin_family = AF_INET; sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); if (nd->nd_myip.s_addr) flags |= NFS_BOOT_HAS_MYIP; if (nd->nd_gwip.s_addr) flags |= NFS_BOOT_HAS_GWIP; if (nd->nd_mask.s_addr) flags |= NFS_BOOT_HAS_MASK; if (sin->sin_addr.s_addr) flags |= NFS_BOOT_HAS_SERVADDR; return flags; } #endif void device_register(device_t dev, void *aux) { /* * Handle network interfaces here, the attachment information is * not available driver independently later. * For disks, there is nothing useful available at attach time. */ #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS) if (device_class(dev) == DV_IFNET) { union xen_cmdline_parseinfo xcp; #ifdef NFS_BOOT_BOOTSTATIC #ifdef DOM0OPS if (xendomain_is_privileged()) { nfs_bootstatic_callback = dom0_bootstatic_callback; } else #endif #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 nfs_bootstatic_callback = xennet_bootstatic_callback; #endif #endif xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); if (strncmp(xcp.xcp_bootdev, device_xname(dev), sizeof(xcp.xcp_bootdev)) == 0) { goto found; } } #endif if (device_class(dev) == DV_IFNET) { struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF); if (bin == NULL) return; /* * We don't check the driver name against the device name * passed by the boot ROM. The ROM should stay usable * if the driver gets obsoleted. * The physical attachment information (checked below) * must be sufficient to identify the device. */ if (bin->bus == BI_BUS_ISA && device_is_a(device_parent(dev), "isa")) { struct isa_attach_args *iaa = aux; /* compare IO base address */ /* XXXJRT what about multiple I/O addrs? */ if (iaa->ia_nio > 0 && bin->addr.iobase == iaa->ia_io[0].ir_addr) goto found; } #if NPCI > 0 if (bin->bus == BI_BUS_PCI && device_is_a(device_parent(dev), "pci")) { struct pci_attach_args *paa = aux; int b, d, f; /* * Calculate BIOS representation of: * * <bus,device,function> * * and compare. */ pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f); if (bin->addr.tag == ((b << 8) | (d << 3) | f)) goto found; } #endif } return; found: if (booted_device) { /* XXX should be a "panic()" */ printf("warning: double match for boot device (%s, %s)\n", device_xname(booted_device), device_xname(dev)); return; } booted_device = dev; } static void handle_wedges(device_t dv, int par) { if (config_handle_wedges(dv, par) == 0) return; booted_device = dv; booted_partition = par; } static int is_valid_disk(device_t dv) { if (device_class(dv) != DV_DISK) return (0); return (device_is_a(dv, "dk") || device_is_a(dv, "sd") || device_is_a(dv, "wd") || device_is_a(dv, "ld") || device_is_a(dv, "ed") || device_is_a(dv, "xbd")); }