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
|
/* $FreeBSD$ */
/* $NetBSD: prom.c,v 1.3 1997/09/06 14:03:58 drochner Exp $ */
/*
* Mach Operating System
* Copyright (c) 1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <sys/types.h>
#include <machine/prom.h>
#include <machine/rpb.h>
#include "common.h"
#include "bootstrap.h"
int console;
static void prom_probe(struct console *cp);
static int prom_init(int);
void prom_putchar(int);
int prom_getchar(void);
int prom_poll(void);
struct console promconsole = {
"prom",
"SRM firmware console",
0,
prom_probe,
prom_init,
prom_putchar,
prom_getchar,
prom_poll,
};
void
init_prom_calls()
{
extern struct prom_vec prom_dispatch_v;
struct rpb *r;
struct crb *c;
char buf[4];
r = (struct rpb *)HWRPB_ADDR;
c = (struct crb *)((u_int8_t *)r + r->rpb_crb_off);
prom_dispatch_v.routine_arg = c->crb_v_dispatch;
prom_dispatch_v.routine = c->crb_v_dispatch->entry_va;
/* Look for console tty. */
prom_getenv(PROM_E_TTY_DEV, buf, 4);
console = buf[0] - '0';
}
static void
prom_probe(struct console *cp)
{
init_prom_calls();
cp->c_flags |= C_PRESENTIN|C_PRESENTOUT;
}
static int
prom_init(int arg)
{
return 0;
}
void
prom_putchar(int c)
{
prom_return_t ret;
char cbuf;
cbuf = c;
do {
ret.bits = prom_dispatch(PROM_R_PUTS, console, &cbuf, 1);
} while ((ret.u.retval & 1) == 0);
}
static int saved_char = -1;
int
prom_getchar()
{
prom_return_t ret;
if (saved_char != -1) {
int c = saved_char;
saved_char = -1;
return c;
}
for (;;) {
ret.bits = prom_dispatch(PROM_R_GETC, console);
if (ret.u.status == 0 || ret.u.status == 1)
return (ret.u.retval);
}
}
int
prom_poll()
{
prom_return_t ret;
if (saved_char != -1)
return 1;
ret.bits = prom_dispatch(PROM_R_GETC, console);
if (ret.u.status == 0 || ret.u.status == 1) {
saved_char = ret.u.retval;
return 1;
}
return 0;
}
int
prom_getenv(id, buf, len)
int id, len;
char *buf;
{
prom_return_t ret;
ret.bits = prom_dispatch(PROM_R_GETENV, id, buf, len-1);
if (ret.u.status & 0x4)
ret.u.retval = 0;
buf[ret.u.retval] = '\0';
return (ret.u.retval);
}
int
prom_open(dev, len)
char *dev;
int len;
{
prom_return_t ret;
ret.bits = prom_dispatch(PROM_R_OPEN, dev, len);
if (ret.u.status & 0x4)
return (-1);
else
return (ret.u.retval);
}
|
