-implement a "device_register()" function to identify network interfaces
by bus type / address (for diskless boot) -add some (experimental, commented out) code which could be used for identification of boot disks - should help for BIOS remappings
This commit is contained in:
drochner
parent
6c6328cc8f
commit
1f1e574146
@ -1,4 +1,4 @@
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/* $NetBSD: autoconf.c,v 1.24 1997/03/26 22:39:01 gwr Exp $ */
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/* $NetBSD: autoconf.c,v 1.25 1997/09/20 14:15:54 drochner Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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@ -55,9 +55,13 @@
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#include <sys/dmap.h>
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#include <sys/reboot.h>
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#include <sys/device.h>
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#include <sys/vnode.h>
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#include <sys/fcntl.h>
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#include <sys/dkio.h>
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#include <machine/pte.h>
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#include <machine/cpu.h>
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#include <machine/bootinfo.h>
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void findroot __P((struct device **, int *));
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@ -113,6 +117,7 @@ cpu_rootconf()
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}
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u_long bootdev = 0; /* should be dev_t, but not until 32 bits */
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struct device *booted_device;
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/*
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* Attempt to find the device from which we were booted.
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@ -124,8 +129,11 @@ findroot(devpp, partp)
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struct device **devpp;
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int *partp;
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{
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int i, majdev, unit, part;
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#ifdef notyet
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struct btinfo_bootdisk *bid;
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#endif
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struct device *dv;
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int i, majdev, unit, part;
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char buf[32];
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/*
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@ -134,6 +142,123 @@ findroot(devpp, partp)
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*devpp = NULL;
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*partp = 0;
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if(booted_device) {
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*devpp = booted_device;
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return;
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}
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if(lookup_bootinfo(BTINFO_NETIF)) {
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/*
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* We got netboot interface information, but
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* "device_register()" couldn't match it to a configured
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* device. Bootdisk information cannot be present at the
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* same time, so give up.
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*/
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printf("findroot: netboot interface not found\n");
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return;
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}
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#ifdef notyet
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bid = lookup_bootinfo(BTINFO_BOOTDISK);
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if(bid) {
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/*
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* Scan all disk devices for ones that match the passed data.
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* Don't break if one is found, to get possible multiple
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* matches - for problem tracking. Use the first match anyway
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* because lower device numbers are more likely to be the
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* boot device.
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*/
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for (dv = alldevs.tqh_first; dv != NULL;
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dv = dv->dv_list.tqe_next) {
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if(dv->dv_class != DV_DISK)
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continue;
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if(!strcmp(dv->dv_cfdata->cf_driver->cd_name, "fd")) {
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/* Assume the configured unit number matches the
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BIOS device number. (This is the old behaviour.)
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Needs some ideas how to handle BIOS's "swap floppy
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drive" options. */
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if((bid->biosdev & 0x80) ||
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dv->dv_unit != bid->biosdev)
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continue;
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goto found;
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}
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if(!strcmp(dv->dv_cfdata->cf_driver->cd_name, "sd") ||
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!strcmp(dv->dv_cfdata->cf_driver->cd_name, "wd")) {
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struct devnametobdevmaj *i;
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struct vnode *tmpvn;
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int error;
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struct disklabel label;
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int found = 0;
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if(!(bid->biosdev & 0x80) || bid->labelsector == -1)
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continue;
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/* A disklabel is required here. The bootblocks don't
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refuse to boot from a disk without label, but this is
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normally not wanted. */
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i = i386_nam2blk;
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while(i->d_name &&
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strcmp(i->d_name, dv->dv_cfdata->cf_driver->cd_name))
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i++;
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if(!i->d_name)
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continue; /* XXX panic() ??? */
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/* Fake a temporary vnode for the disk, open it and read
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the disklabel for comparision. */
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if(bdevvp(MAKEDISKDEV(i->d_maj, dv->dv_unit, bid->partition),
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&tmpvn))
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panic("findroot can't alloc vnode");
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error = VOP_OPEN(tmpvn, FREAD, FSCRED, 0);
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if(error) {
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printf("findroot: can't open dev %s (%d)\n",
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dv->dv_xname, error);
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continue;
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}
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error = VOP_IOCTL(tmpvn, DIOCGDINFO, (caddr_t)&label,
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FREAD, NOCRED, 0);
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if(error) {
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/* XXX can't happen - open() would have errored
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out (or faked up one) */
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printf("can't get label for dev %s (%d)\n",
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dv->dv_xname, error);
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goto closeout;
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}
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/* compare with our data */
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if(label.d_type == bid->label.type &&
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label.d_checksum == bid->label.checksum &&
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!strncmp(label.d_packname, bid->label.packname, 16))
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found = 1;
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closeout:
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VOP_CLOSE(tmpvn, FREAD, NOCRED, 0);
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vrele(tmpvn);
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if(found)
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goto found;
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continue;
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}
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/* no "fd", "wd" or "sd" */
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continue;
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found:
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if(*devpp) {
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printf("warning: double match for boot device (%s, %s)\n",
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(*devpp)->dv_xname, dv->dv_xname);
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continue;
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}
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*devpp = dv;
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*partp = bid->partition;
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}
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if(*devpp)
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return;
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}
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#endif /* notyet */
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#if 0
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printf("howto %x bootdev %x ", boothowto, bootdev);
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#endif
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@ -161,3 +286,57 @@ findroot(devpp, partp)
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}
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}
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}
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#include <dev/isa/isavar.h>
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#include <dev/pci/pcivar.h>
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void
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device_register(dev, aux)
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struct device *dev;
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void *aux;
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{
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/*
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* Handle network interfaces here, the attachment information is
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* not available driver independantly later.
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* For disks, there is nothing useful available at attach time.
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*/
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if(dev->dv_class == DV_IFNET) {
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struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF);
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if(!bin)
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return;
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/* check driver name */
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if(strcmp(bin->ifname, dev->dv_cfdata->cf_driver->cd_name))
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return;
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if(bin->bus == BI_BUS_ISA &&
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!strcmp(dev->dv_parent->dv_cfdata->cf_driver->cd_name, "isa")) {
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struct isa_attach_args *iaa = aux;
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/* compare IO base address */
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if(bin->addr.iobase == iaa->ia_iobase)
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goto found;;
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}
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if(bin->bus == BI_BUS_PCI &&
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!strcmp(dev->dv_parent->dv_cfdata->cf_driver->cd_name, "pci")) {
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struct pci_attach_args *paa = aux;
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int b, d, f;
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/* calculate BIOS representation of (bus,device,function)
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and compare */
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pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f);
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if(bin->addr.tag == ((b << 8) | (d << 3) | f))
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goto found;
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}
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}
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return;
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found:
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if(booted_device) {
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/* XXX should be a "panic()" */
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printf("warning: double match for boot device (%s, %s)\n",
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booted_device->dv_xname, dev->dv_xname);
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return;
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}
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booted_device = dev;
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}
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