1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
37 * $FreeBSD: releng/5.1/sys/amd64/amd64/autoconf.c 114349 2003-05-01 01:05:25Z peter $
38 */
39
40 /*
41 * Setup the system to run on the current machine.
42 *
43 * Configure() is called at boot time and initializes the vba
44 * device tables and the memory controller monitoring. Available
45 * devices are determined (from possibilities mentioned in ioconf.c),
46 * and the drivers are initialized.
47 */
48 #include "opt_bootp.h"
49 #include "opt_isa.h"
50 #include "opt_nfs.h"
51 #include "opt_nfsroot.h"
52 #include "opt_bus.h"
53
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/bus.h>
57 #include <sys/conf.h>
58 #include <sys/reboot.h>
59 #include <sys/kernel.h>
60 #include <sys/malloc.h>
61 #include <sys/mount.h>
62 #include <sys/cons.h>
63
64 #include <sys/socket.h>
65 #include <net/if.h>
66 #include <net/if_dl.h>
67 #include <net/if_types.h>
68 #include <net/if_var.h>
69 #include <net/ethernet.h>
70 #include <netinet/in.h>
71 #include <nfs/rpcv2.h>
72 #include <nfs/nfsproto.h>
73 #include <nfsclient/nfs.h>
74 #include <nfsclient/nfsdiskless.h>
75
76 #include <machine/md_var.h>
77 #include <amd64/isa/icu.h>
78
79 #ifdef DEV_ISA
80 #include <isa/isavar.h>
81
82 device_t isa_bus_device = 0;
83 #endif
84
85 static void configure_first(void *);
86 static void configure(void *);
87 static void configure_final(void *);
88
89 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
90 /* SI_ORDER_SECOND is hookable */
91 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
92 /* SI_ORDER_MIDDLE is hookable */
93 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
94
95 /*
96 * Determine i/o configuration for a machine.
97 */
98 static void
99 configure_first(dummy)
100 void *dummy;
101 {
102 }
103
104 static void
105 configure(dummy)
106 void *dummy;
107 {
108
109 /*
110 * Activate the ICU's. Note that we are explicitly at splhigh()
111 * at present as we have no way to disable stray PCI level triggered
112 * interrupts until the devices have had a driver attached. This
113 * is particularly a problem when the interrupts are shared. For
114 * example, if IRQ 10 is shared between a disk and network device
115 * and the disk device generates an interrupt, if we "activate"
116 * IRQ 10 when the network driver is set up, then we will get
117 * recursive interrupt 10's as nothing will know how to turn off
118 * the disk device's interrupt.
119 *
120 * Having the ICU's active means we can probe interrupt routing to
121 * see if a device causes the corresponding pending bit to be set.
122 *
123 * This is all rather inconvenient.
124 */
125 enable_intr();
126 INTREN(IRQ_SLAVE);
127
128 /* nexus0 is the top of the i386 device tree */
129 device_add_child(root_bus, "nexus", 0);
130
131 /* initialize new bus architecture */
132 root_bus_configure();
133
134 #ifdef DEV_ISA
135 /*
136 * Explicitly probe and attach ISA last. The isa bus saves
137 * it's device node at attach time for us here.
138 */
139 if (isa_bus_device)
140 isa_probe_children(isa_bus_device);
141 #endif
142
143 /*
144 * Now we're ready to handle (pending) interrupts.
145 * XXX this is slightly misplaced.
146 */
147 spl0();
148 }
149
150 static void
151 configure_final(dummy)
152 void *dummy;
153 {
154
155 cninit_finish();
156 cold = 0;
157 }
158
159 /*
160 * Do legacy root filesystem discovery.
161 */
162 void
163 cpu_rootconf()
164 {
165 #ifdef BOOTP
166 bootpc_init();
167 #endif
168 #if defined(NFSCLIENT) && defined(NFS_ROOT)
169 #if !defined(BOOTP_NFSROOT)
170 nfs_setup_diskless();
171 if (nfs_diskless_valid)
172 #endif
173 rootdevnames[0] = "nfs:";
174 #endif
175 }
176 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
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