1/* $NetBSD: autoconf.c,v 1.17 2014/04/03 15:53:05 christos Exp $ */
2/* NetBSD: autoconf.c,v 1.75 2003/12/30 12:33:22 pk Exp */
3
4/*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)autoconf.c 7.1 (Berkeley) 5/9/91
36 */
37
38/*
39 * Setup the system to run on the current machine.
40 *
41 * Configure() is called at boot time and initializes the vba
42 * device tables and the memory controller monitoring. Available
43 * devices are determined (from possibilities mentioned in ioconf.c),
44 * and the drivers are initialized.
45 */
46
47#include <sys/cdefs.h>
48__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.17 2014/04/03 15:53:05 christos Exp $");
49
50#include "opt_xen.h"
51#include "opt_compat_oldboot.h"
52#include "opt_multiprocessor.h"
53#include "opt_nfs_boot.h"
54
55#include <sys/param.h>
56#include <sys/systm.h>
57#include <sys/buf.h>
58#include <sys/disklabel.h>
59#include <sys/disk.h>
60#include <sys/conf.h>
61#ifdef COMPAT_OLDBOOT
62#include <sys/reboot.h>
63#endif
64#include <sys/device.h>
65#include <sys/vnode.h>
66#include <sys/fcntl.h>
67#include <sys/dkio.h>
68#include <sys/proc.h>
69#include <sys/kauth.h>
70
71#ifdef NFS_BOOT_BOOTSTATIC
72#include <net/if.h>
73#include <net/if_ether.h>
74#include <netinet/in.h>
75#include <nfs/rpcv2.h>
76#include <nfs/nfsproto.h>
77#include <nfs/nfs.h>
78#include <nfs/nfsmount.h>
79#include <nfs/nfsdiskless.h>
80#include <xen/if_xennetvar.h>
81#endif
82
83#include <machine/pte.h>
84#include <machine/cpu.h>
85#include <machine/gdt.h>
86#include <machine/pcb.h>
87#include <machine/bootinfo.h>
88
89static int is_valid_disk(device_t);
90
91struct disklist *x86_alldisks;
92int x86_ndisks;
93
94#include "bios32.h"
95#if NBIOS32 > 0
96#include <machine/bios32.h>
97#endif
98
99#include "opt_pcibios.h"
100#ifdef PCIBIOS
101#include <dev/pci/pcireg.h>
102#include <dev/pci/pcivar.h>
103#include <i386/pci/pcibios.h>
104#endif
105
106/*
107 * Determine i/o configuration for a machine.
108 */
109void
110cpu_configure(void)
111{
112 struct pcb *pcb;
113
114 startrtclock();
115
116#if NBIOS32 > 0 && defined(DOM0OPS)
117 if (xendomain_is_dom0())
118 bios32_init();
119#endif /* NBIOS32 > 0 && DOM0OPS */
120#ifdef PCIBIOS
121 pcibios_init();
122#endif
123
124 if (config_rootfound("mainbus", NULL) == NULL)
125 panic("configure: mainbus not configured");
126
127#ifdef INTRDEBUG
128 intr_printconfig();
129#endif
130
131 /* resync cr0 after FPU configuration */
132 pcb = lwp_getpcb(&lwp0);
133 pcb->pcb_cr0 = rcr0();
134#ifdef MULTIPROCESSOR
135 /* propagate this to the idle pcb's. */
136 cpu_init_idle_lwps();
137#endif
138
139 spl0();
140}
141
142void
143cpu_rootconf(void)
144{
145 cpu_bootconf();
146
147 printf("boot device: %s\n",
148 booted_device ? device_xname(booted_device) : "<unknown>");
149 rootconf();
150}
151
152
153/*
154 * Attempt to find the device from which we were booted.
155 */
156void
157cpu_bootconf(void)
158{
159 device_t dv;
160 deviter_t di;
161 union xen_cmdline_parseinfo xcp;
162
163 if (booted_device)
164 return;
165
166 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp);
167
168 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST);
169 dv != NULL;
170 dv = deviter_next(&di)) {
171 bool is_ifnet, is_disk;
172 const char *devname;
173
174 is_ifnet = (device_class(dv) == DV_IFNET);
175 is_disk = is_valid_disk(dv);
176 devname = device_xname(dv);
177
178 if (!is_ifnet && !is_disk)
179 continue;
180
181 if (is_disk && xcp.xcp_bootdev[0] == 0) {
182 booted_device = dv;
183 break;
184 }
185
186 if (strncmp(xcp.xcp_bootdev, devname, strlen(devname)))
187 continue;
188
189 if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) {
190 booted_partition = toupper(
191 xcp.xcp_bootdev[strlen(devname)]) - 'A';
192 }
193
194 booted_device = dv;
195 break;
196 }
197 deviter_release(&di);
198}
199
200#include "pci.h"
201
202#include <dev/isa/isavar.h>
203#if NPCI > 0
204#include <dev/pci/pcivar.h>
205#endif
206
207
208#if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS)
209static int
210dom0_bootstatic_callback(struct nfs_diskless *nd)
211{
212#if 0
213 struct ifnet *ifp = nd->nd_ifp;
214#endif
215 int flags = 0;
216 union xen_cmdline_parseinfo xcp;
217 struct sockaddr_in *sin;
218
219 memset(&xcp, 0, sizeof(xcp.xcp_netinfo));
220 xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */
221 xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host;
222 xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp);
223
224 if (xcp.xcp_netinfo.xi_root[0] != '\0') {
225 flags |= NFS_BOOT_HAS_SERVER;
226 if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL)
227 flags |= NFS_BOOT_HAS_ROOTPATH;
228 }
229
230 nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]);
231 nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]);
232 nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]);
233
234 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr;
235 memset((void *)sin, 0, sizeof(*sin));
236 sin->sin_len = sizeof(*sin);
237 sin->sin_family = AF_INET;
238 sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]);
239
240 if (nd->nd_myip.s_addr)
241 flags |= NFS_BOOT_HAS_MYIP;
242 if (nd->nd_gwip.s_addr)
243 flags |= NFS_BOOT_HAS_GWIP;
244 if (nd->nd_mask.s_addr)
245 flags |= NFS_BOOT_HAS_MASK;
246 if (sin->sin_addr.s_addr)
247 flags |= NFS_BOOT_HAS_SERVADDR;
248
249 return flags;
250}
251#endif
252
253void
254device_register(device_t dev, void *aux)
255{
256 /*
257 * Handle network interfaces here, the attachment information is
258 * not available driver independently later.
259 * For disks, there is nothing useful available at attach time.
260 */
261#if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS)
262 if (device_class(dev) == DV_IFNET) {
263 union xen_cmdline_parseinfo xcp;
264
265#ifdef NFS_BOOT_BOOTSTATIC
266#ifdef DOM0OPS
267 if (xendomain_is_privileged()) {
268 nfs_bootstatic_callback = dom0_bootstatic_callback;
269 } else
270#endif
271#if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0
272 nfs_bootstatic_callback = xennet_bootstatic_callback;
273#endif
274#endif
275 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp);
276 if (strncmp(xcp.xcp_bootdev, device_xname(dev),
277 sizeof(xcp.xcp_bootdev)) == 0)
278 {
279 goto found;
280 }
281 }
282#endif
283 if (device_class(dev) == DV_IFNET) {
284 struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF);
285 if (bin == NULL)
286 return;
287
288 /*
289 * We don't check the driver name against the device name
290 * passed by the boot ROM. The ROM should stay usable
291 * if the driver gets obsoleted.
292 * The physical attachment information (checked below)
293 * must be sufficient to identify the device.
294 */
295
296 if (bin->bus == BI_BUS_ISA &&
297 device_is_a(device_parent(dev), "isa")) {
298 struct isa_attach_args *iaa = aux;
299
300 /* compare IO base address */
301 /* XXXJRT what about multiple I/O addrs? */
302 if (iaa->ia_nio > 0 &&
303 bin->addr.iobase == iaa->ia_io[0].ir_addr)
304 goto found;
305 }
306#if NPCI > 0
307 if (bin->bus == BI_BUS_PCI &&
308 device_is_a(device_parent(dev), "pci")) {
309 struct pci_attach_args *paa = aux;
310 int b, d, f;
311
312 /*
313 * Calculate BIOS representation of:
314 *
315 * <bus,device,function>
316 *
317 * and compare.
318 */
319 pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f);
320 if (bin->addr.tag == ((b << 8) | (d << 3) | f))
321 goto found;
322 }
323#endif
324 }
325 return;
326
327found:
328 if (booted_device) {
329 /* XXX should be a "panic()" */
330 printf("warning: double match for boot device (%s, %s)\n",
331 device_xname(booted_device), device_xname(dev));
332 return;
333 }
334 booted_device = dev;
335}
336
337static int
338is_valid_disk(device_t dv)
339{
340
341 if (device_class(dv) != DV_DISK)
342 return (0);
343
344 return (device_is_a(dv, "dk") ||
345 device_is_a(dv, "sd") ||
346 device_is_a(dv, "wd") ||
347 device_is_a(dv, "ld") ||
348 device_is_a(dv, "ed") ||
349 device_is_a(dv, "xbd"));
350}
351