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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2012 Gary Mills
* Copyright 2020 Joyent, Inc.
*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/machparam.h>
#include <sys/archsystm.h>
#include <sys/boot_console.h>
#include <sys/varargs.h>
#include "dboot_asm.h"
#include "dboot_printf.h"
#include "dboot_xboot.h"
#ifdef __xpv
#include <sys/hypervisor.h>
#endif
/*
* This file provides simple output formatting via dboot_printf()
*/
static void do_dboot_printf(char *fmt, va_list args);
static char digits[] = "0123456789abcdef";
/*
* Primitive version of panic, prints a message then resets the system
*/
void
dboot_panic(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_dboot_printf(fmt, args);
if (boot_console_type(NULL) == CONS_SCREEN_TEXT) {
dboot_printf("Press any key to reboot\n");
(void) bcons_getchar();
}
outb(0x64, 0xfe); /* this resets the system, see pc_reset() */
dboot_halt(); /* just in case */
}
/*
* printf for boot code
*/
void
dboot_printf(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_dboot_printf(fmt, args);
}
/*
* output a string
*/
static void
dboot_puts(char *s)
{
while (*s != 0) {
bcons_putchar(*s);
++s;
}
}
static void
dboot_putnum(uint64_t x, boolean_t is_signed, uint8_t base)
{
char buffer[64]; /* digits in reverse order */
int i;
if (is_signed && (int64_t)x < 0) {
bcons_putchar('-');
x = -x;
}
for (i = -1; x != 0 && i <= 63; x /= base)
buffer[++i] = digits[x - ((x / base) * base)];
if (i < 0)
buffer[++i] = '0';
while (i >= 0)
bcons_putchar(buffer[i--]);
}
/*
* Very primitive printf - only does a subset of the standard format characters.
*/
static void
do_dboot_printf(char *fmt, va_list args)
{
char *s;
uint64_t x;
uint8_t base;
uint8_t size;
if (fmt == NULL) {
dboot_puts("dboot_printf(): 1st arg is NULL\n");
return;
}
for (; *fmt; ++fmt) {
if (*fmt != '%') {
bcons_putchar(*fmt);
continue;
}
size = 0;
again:
++fmt;
switch (*fmt) {
case '%':
bcons_putchar(*fmt);
break;
case 'c':
x = va_arg(args, int);
bcons_putchar(x);
break;
case 's':
s = va_arg(args, char *);
if (s == NULL)
dboot_puts("*NULL*");
else
dboot_puts(s);
break;
case 'p':
x = va_arg(args, ulong_t);
dboot_putnum(x, B_FALSE, 16);
break;
case 'l':
if (size == 0)
size = sizeof (long);
else if (size == sizeof (long))
size = sizeof (long long);
goto again;
case 'd':
if (size == 0)
x = va_arg(args, int);
else if (size == sizeof (long))
x = va_arg(args, long);
else
x = va_arg(args, long long);
dboot_putnum(x, B_TRUE, 10);
break;
case 'u':
base = 10;
goto unsigned_num;
case 'b':
base = 2;
goto unsigned_num;
case 'o':
base = 8;
goto unsigned_num;
case 'x':
base = 16;
unsigned_num:
if (size == 0)
x = va_arg(args, uint_t);
else if (size == sizeof (ulong_t))
x = va_arg(args, ulong_t);
else
x = va_arg(args, unsigned long long);
dboot_putnum(x, B_FALSE, base);
break;
default:
dboot_puts("dboot_printf(): unknown % escape\n");
}
}
}
|
