/*- * Copyright (c) 1990 The Regents of the University of California. * Copyright (c) 2008 The DragonFly Project. * 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. * * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $ */ /* * 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 "opt_bootp.h" #include "opt_cd9660.h" #include "opt_nfs.h" #include "opt_nfsroot.h" #include "opt_rootdevname.h" #include "use_isa.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NISA > 0 #include device_t isa_bus_device = NULL; #endif static void configure_first (void *); static void configure (void *); static void configure_final (void *); #if defined(NFS) && defined(NFS_ROOT) #if !defined(BOOTP_NFSROOT) static void pxe_setup_nfsdiskless(void); #endif #endif SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); /* SI_ORDER_SECOND is hookable */ SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); /* SI_ORDER_MIDDLE is hookable */ SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); cdev_t rootdev = NULL; cdev_t dumpdev = NULL; /* * nfsroot.iosize may be set in loader.conf, 32768 is recommended to * be able to max-out a GigE link if the server supports it. Many servers * do not so the default is 8192. * * nfsroot.rahead defaults to something reasonable, can be overridden. */ static int nfsroot_iosize = 8192; TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize); static int nfsroot_rahead = 4; TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead); /* * Determine i/o configuration for a machine. */ static void configure_first(void *dummy) { } static void configure(void *dummy) { #if NISA > 0 void *low_dma_reserve; /* * Try to reserve 512k of low dma memory for later isa attach. * Document as a REALLY bad hack. */ low_dma_reserve = contigmalloc(0x80000, M_TEMP, M_NOWAIT, 0ul, 0xfffffful, 1ul, 0x20000ul); if (bootverbose) kprintf("low dma reserve placed @ %p\n", low_dma_reserve); #endif /* * This will configure all devices, generally starting with the * nexus (pc64/x86_64/nexus.c). The nexus ISA code explicitly * dummies up the attach in order to delay legacy initialization * until after all other busses/subsystems have had a chance * at those resources. */ root_bus_configure(); #if NISA > 0 /* * Free up reserve if we got it. */ if (low_dma_reserve != NULL) { contigfree(low_dma_reserve, 0x80000, M_TEMP); } else if (bootverbose) { kprintf("low dma reserve was not allocated\n"); } /* * Explicitly probe and attach ISA last. The isa bus saves * it's device node at attach time for us here. */ if (isa_bus_device) isa_probe_children(isa_bus_device); #endif /* * Allow lowering of the ipl to the lowest kernel level if we * panic (or call tsleep() before clearing `cold'). No level is * completely safe (since a panic may occur in a critical region * at splhigh()), but we want at least bio interrupts to work. */ safepri = TDPRI_KERN_USER; } /* * Finalize configure. Reprobe for the console, in case it was one * of the devices which attached, then finish console initialization. */ static void configure_final(void *dummy) { cninit(); cninit_finish(); } #ifdef BOOTP void bootpc_init(void); #endif /* * Do legacy root filesystem discovery. */ void cpu_rootconf(void) { #ifdef BOOTP bootpc_init(); #endif #if defined(NFS) && defined(NFS_ROOT) #if !defined(BOOTP_NFSROOT) pxe_setup_nfsdiskless(); if (nfs_diskless_valid) #endif rootdevnames[0] = "nfs:"; #endif } SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL); #if defined(NFS) && defined(NFS_ROOT) #if !defined(BOOTP_NFSROOT) #include #include #include #include #include #include #include #include #include #include #include extern struct nfs_diskless nfs_diskless; /* * Convert a kenv variable to a sockaddr. If the kenv variable does not * exist the sockaddr will remain zerod out (callers typically just check * sin_len). A network address of 0.0.0.0 is equivalent to failure. */ static int inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) { u_int32_t a[4]; char *cp; bzero(sa, sizeof(*sa)); if ((cp = kgetenv(ev)) == NULL) return(1); if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) return(1); if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) return(1); /* XXX is this ordering correct? */ sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; sa->sin_len = sizeof(*sa); sa->sin_family = AF_INET; return(0); } static int hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) { char *cp; u_int32_t a[6]; bzero(sa, sizeof(*sa)); sa->sdl_len = sizeof(*sa); sa->sdl_family = AF_LINK; sa->sdl_type = IFT_ETHER; sa->sdl_alen = ETHER_ADDR_LEN; if ((cp = kgetenv(ev)) == NULL) return(1); if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) return(1); sa->sdl_data[0] = a[0]; sa->sdl_data[1] = a[1]; sa->sdl_data[2] = a[2]; sa->sdl_data[3] = a[3]; sa->sdl_data[4] = a[4]; sa->sdl_data[5] = a[5]; return(0); } static int decode_nfshandle(char *ev, u_char *fh) { u_char *cp; int len, val; if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) return(0); len = 0; cp++; for (;;) { if (*cp == 'X') return(len); if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) return(0); *(fh++) = val; len++; cp += 2; if (len > NFSX_V2FH) return(0); } } /* * Populate the essential fields in the nfsv3_diskless structure. * * The loader is expected to export the following environment variables: * * boot.netif.ip IP address on boot interface * boot.netif.netmask netmask on boot interface * boot.netif.gateway default gateway (optional) * boot.netif.hwaddr hardware address of boot interface * boot.nfsroot.server IP address of root filesystem server * boot.nfsroot.path path of the root filesystem on server * boot.nfsroot.nfshandle NFS handle for root filesystem on server */ static void pxe_setup_nfsdiskless(void) { struct nfs_diskless *nd = &nfs_diskless; struct ifnet *ifp; struct sockaddr_dl *sdl, ourdl; struct sockaddr_in myaddr, netmask; char *cp; /* set up interface */ if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) return; if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { kprintf("PXE: no netmask\n"); return; } bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { kprintf("PXE: no hardware address\n"); return; } ifnet_lock(); TAILQ_FOREACH(ifp, &ifnetlist, if_link) { struct ifaddr_container *ifac; TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { struct ifaddr *ifa = ifac->ifa; if ((ifa->ifa_addr->sa_family == AF_LINK) && (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { if ((sdl->sdl_type == ourdl.sdl_type) && (sdl->sdl_alen == ourdl.sdl_alen) && !bcmp(sdl->sdl_data + sdl->sdl_nlen, ourdl.sdl_data + ourdl.sdl_nlen, sdl->sdl_alen)) { strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name)); ifnet_unlock(); goto match_done; } } } } ifnet_unlock(); kprintf("PXE: no interface\n"); return; /* no matching interface */ match_done: /* set up gateway */ inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); /* XXX set up swap? */ /* set up root mount */ nd->root_args.rsize = nfsroot_iosize; nd->root_args.wsize = nfsroot_iosize; nd->root_args.sotype = SOCK_STREAM; nd->root_args.readahead = nfsroot_rahead; nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT | NFSMNT_READAHEAD; if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { kprintf("PXE: no server\n"); return; } nd->root_saddr.sin_port = htons(NFS_PORT); /* * A tftp-only loader may pass NFS path information without a * root handle. Generate a warning but continue configuring. */ if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { kprintf("PXE: Warning, no NFS handle passed from loader\n"); } if ((cp = kgetenv("boot.nfsroot.path")) != NULL) strncpy(nd->root_hostnam, cp, MNAMELEN - 1); nfs_diskless_valid = 1; } #endif #endif