1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
|
/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
/*
* MD bootstrap main() and assorted miscellaneous
* commands.
*/
#include <stand.h>
#include <string.h>
#include <machine/bootinfo.h>
#include <sys/reboot.h>
#include "bootstrap.h"
#include "libi386/libi386.h"
#include "btxv86.h"
#define KARGS_FLAGS_CD 0x1
#define KARGS_FLAGS_PXE 0x2
/* Arguments passed in from the boot1/boot2 loader */
static struct
{
u_int32_t howto;
u_int32_t bootdev;
u_int32_t bootflags;
u_int32_t pxeinfo;
u_int32_t res2;
u_int32_t bootinfo;
} *kargs;
static u_int32_t initial_howto;
static u_int32_t initial_bootdev;
static struct bootinfo *initial_bootinfo;
struct arch_switch archsw; /* MI/MD interface boundary */
static void extract_currdev(void);
static int isa_inb(int port);
static void isa_outb(int port, int value);
void exit(int code);
/* from vers.c */
extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
/* XXX debugging */
extern char end[];
int
main(void)
{
int i;
/* Pick up arguments */
kargs = (void *)__args;
initial_howto = kargs->howto;
initial_bootdev = kargs->bootdev;
initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL;
/*
* Initialise the heap as early as possible. Once this is done, malloc() is usable.
*/
bios_getmem();
setheap((void *)end, (void *)bios_basemem);
/*
* XXX Chicken-and-egg problem; we want to have console output early, but some
* console attributes may depend on reading from eg. the boot device, which we
* can't do yet.
*
* We can use printf() etc. once this is done.
* If the previous boot stage has requested a serial console, prefer that.
*/
if (initial_howto & RB_SERIAL)
setenv("console", "comconsole", 1);
if (initial_howto & RB_MUTE)
setenv("console", "nullconsole", 1);
cons_probe();
/*
* Initialise the block cache
*/
bcache_init(32, 512); /* 16k cache XXX tune this */
/*
* We only want the PXE disk to try to init itself in the below walk through
* devsw if we actually booted off of PXE.
*/
if((kargs->bootinfo == NULL) &&
((kargs->bootflags & KARGS_FLAGS_PXE) != 0)) {
pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL);
}
/*
* March through the device switch probing for things.
*/
for (i = 0; devsw[i] != NULL; i++)
if (devsw[i]->dv_init != NULL)
(devsw[i]->dv_init)();
printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024);
#ifndef PC98
/* detect ACPI for future reference */
biosacpi_detect();
#endif
printf("\n");
printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
printf("(%s, %s)\n", bootprog_maker, bootprog_date);
extract_currdev(); /* set $currdev and $loaddev */
setenv("LINES", "24", 1); /* optional */
archsw.arch_autoload = i386_autoload;
archsw.arch_getdev = i386_getdev;
archsw.arch_copyin = i386_copyin;
archsw.arch_copyout = i386_copyout;
archsw.arch_readin = i386_readin;
archsw.arch_isainb = isa_inb;
archsw.arch_isaoutb = isa_outb;
interact(); /* doesn't return */
/* if we ever get here, it is an error */
return (1);
}
/*
* Set the 'current device' by (if possible) recovering the boot device as
* supplied by the initial bootstrap.
*
* XXX should be extended for netbooting.
*/
static void
extract_currdev(void)
{
struct i386_devdesc new_currdev;
int major, biosdev;
/* Assume we are booting from a BIOS disk by default */
new_currdev.d_dev = &biosdisk;
new_currdev.d_type = new_currdev.d_dev->dv_type;
/* new-style boot loaders such as pxeldr and cdldr */
if (kargs->bootinfo == NULL) {
if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) {
/* we are booting from a CD with cdldr */
new_currdev.d_kind.biosdisk.slice = -1;
new_currdev.d_kind.biosdisk.partition = 0;
biosdev = initial_bootdev;
} else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) {
/* we are booting from pxeldr */
new_currdev.d_dev = &pxedisk;
new_currdev.d_type = new_currdev.d_dev->dv_type;
new_currdev.d_kind.netif.unit = 0;
biosdev = -1;
} else {
/* we don't know what our boot device is */
new_currdev.d_kind.biosdisk.slice = -1;
new_currdev.d_kind.biosdisk.partition = 0;
biosdev = -1;
}
} else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) {
/* The passed-in boot device is bad */
new_currdev.d_kind.biosdisk.slice = -1;
new_currdev.d_kind.biosdisk.partition = 0;
biosdev = -1;
} else {
new_currdev.d_kind.biosdisk.slice = (B_ADAPTOR(initial_bootdev) << 4) +
B_CONTROLLER(initial_bootdev) - 1;
new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev);
biosdev = initial_bootinfo->bi_bios_dev;
major = B_TYPE(initial_bootdev);
/*
* If we are booted by an old bootstrap, we have to guess at the BIOS
* unit number. We will loose if there is more than one disk type
* and we are not booting from the lowest-numbered disk type
* (ie. SCSI when IDE also exists).
*/
#ifdef PC98
if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { /* biosdev doesn't match major */
if (B_TYPE(initial_bootdev) == 6)
biosdev = 0x30 + B_UNIT(initial_bootdev);
else
biosdev = (major << 3) + 0x80 + B_UNIT(initial_bootdev);
}
#else
if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */
biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */
#endif
}
/*
* If we are booting off of a BIOS disk and we didn't succeed in determining
* which one we booted off of, just use disk0: as a reasonable default.
*/
if ((new_currdev.d_type == devsw[0]->dv_type) &&
((new_currdev.d_kind.biosdisk.unit = bd_bios2unit(biosdev)) == -1)) {
printf("Can't work out which disk we are booting from.\n"
"Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev);
new_currdev.d_kind.biosdisk.unit = 0;
}
env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev),
i386_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset,
env_nounset);
}
COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
static int
command_reboot(int argc, char *argv[])
{
int i;
for (i = 0; devsw[i] != NULL; ++i)
if (devsw[i]->dv_cleanup != NULL)
(devsw[i]->dv_cleanup)();
printf("Rebooting...\n");
delay(1000000);
__exit(0);
}
/* provide this for panic, as it's not in the startup code */
void
exit(int code)
{
__exit(code);
}
COMMAND_SET(heap, "heap", "show heap usage", command_heap);
static int
command_heap(int argc, char *argv[])
{
mallocstats();
printf("heap base at %p, top at %p\n", end, sbrk(0));
return(CMD_OK);
}
/* ISA bus access functions for PnP, derived from <machine/cpufunc.h> */
static int
isa_inb(int port)
{
u_char data;
if (__builtin_constant_p(port) &&
(((port) & 0xffff) < 0x100) &&
((port) < 0x10000)) {
__asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port)));
} else {
__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
}
return(data);
}
static void
isa_outb(int port, int value)
{
u_char al = value;
if (__builtin_constant_p(port) &&
(((port) & 0xffff) < 0x100) &&
((port) < 0x10000)) {
__asm __volatile("outb %0,%1" : : "a" (al), "id" ((u_short)(port)));
} else {
__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
}
}
|