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
|
/* $OpenBSD: prom.c,v 1.8 2010/05/14 21:08:28 naddy Exp $ */
/* $NetBSD: prom.c,v 1.2 1996/11/25 16:18:16 cgd 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 <lib/libsa/stand.h>
#include <sys/types.h>
#include <machine/rpb.h>
#include <machine/prom.h>
int console;
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';
}
int
getchar()
{
prom_return_t ret;
for (;;) {
ret.bits = prom_dispatch(PROM_R_GETC, console);
if (ret.u.status == 0 || ret.u.status == 1)
return (ret.u.retval);
}
}
void
putchar(c)
int c;
{
prom_return_t ret;
char cbuf;
if (c == '\r' || c == '\n') {
cbuf = '\r';
do {
ret.bits = prom_dispatch(PROM_R_PUTS, console,
&cbuf, 1);
} while ((ret.u.retval & 1) == 0);
cbuf = '\n';
} else
cbuf = c;
do {
ret.bits = prom_dispatch(PROM_R_PUTS, console, &cbuf, 1);
} while ((ret.u.retval & 1) == 0);
}
int
prom_getenv(id, buf, len)
int id, len;
char *buf;
{
/*
* On at least some systems, the GETENV call requires a
* 8-byte-aligned buffer, or it bails out with a "kernel stack
* not valid halt". Provide a local, aligned buffer here and
* then copy to the caller's buffer.
*/
static char abuf[128] __attribute__ ((aligned (8)));
prom_return_t ret;
ret.bits = prom_dispatch(PROM_R_GETENV, id, abuf, 128);
if (ret.u.status & 0x4)
ret.u.retval = 0;
len--;
if (len > ret.u.retval)
len = ret.u.retval;
memcpy(buf, abuf, len);
buf[len] = '\0';
return (len);
}
|
