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
|
/* $OpenBSD: bugio.c,v 1.10 2003/09/01 19:14:01 miod Exp $ */
/* Copyright (c) 1998 Steve Murphree, Jr. */
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/asm_macro.h>
#include <machine/bugio.h>
#include <machine/prom.h>
register_t ossr0, ossr1, ossr2, ossr3;
register_t bugsr0, bugsr1, bugsr2, bugsr3;
unsigned long bugvec[2], sysbugvec[2];
void bug_vector(void);
void sysbug_vector(void);
#define MVMEPROM_CALL(x) \
__asm__ __volatile__ (__CONCAT("or r9,r0,",__STRING(x))); \
__asm__ __volatile__ ("tb0 0,r0,496")
void
bug_vector()
{
unsigned long *vbr, psr;
psr = disable_interrupts_return_psr(); /* paranoia */
__asm__ __volatile__ ("ldcr %0, cr7" : "=r" (vbr));
vbr[2 * MVMEPROM_VECTOR + 0] = bugvec[0];
vbr[2 * MVMEPROM_VECTOR + 1] = bugvec[1];
set_psr(psr);
}
void
sysbug_vector()
{
unsigned long *vbr, psr;
psr = disable_interrupts_return_psr(); /* paranoia */
__asm__ __volatile__ ("ldcr %0, cr7" : "=r" (vbr));
vbr[2 * MVMEPROM_VECTOR + 0] = sysbugvec[0];
vbr[2 * MVMEPROM_VECTOR + 1] = sysbugvec[1];
set_psr(psr);
}
#define BUGCTXT() \
{ \
bug_vector(); \
__asm__ __volatile__ ("ldcr %0, cr17" : "=r" (ossr0)); \
__asm__ __volatile__ ("ldcr %0, cr18" : "=r" (ossr1)); \
__asm__ __volatile__ ("ldcr %0, cr19" : "=r" (ossr2)); \
__asm__ __volatile__ ("ldcr %0, cr20" : "=r" (ossr3)); \
\
__asm__ __volatile__ ("stcr %0, cr17" :: "r"(bugsr0)); \
__asm__ __volatile__ ("stcr %0, cr18" :: "r"(bugsr1)); \
__asm__ __volatile__ ("stcr %0, cr19" :: "r"(bugsr2)); \
__asm__ __volatile__ ("stcr %0, cr20" :: "r"(bugsr3)); \
}
#define OSCTXT() \
{ \
__asm__ __volatile__ ("ldcr %0, cr17" : "=r" (bugsr0):: \
"r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \
"r9", "r10", "r11", "r12", "r13"); \
__asm__ __volatile__ ("ldcr %0, cr18" : "=r" (bugsr1)); \
__asm__ __volatile__ ("ldcr %0, cr19" : "=r" (bugsr2)); \
__asm__ __volatile__ ("ldcr %0, cr20" : "=r" (bugsr3)); \
\
__asm__ __volatile__ ("stcr %0, cr17" :: "r"(ossr0)); \
__asm__ __volatile__ ("stcr %0, cr18" :: "r"(ossr1)); \
__asm__ __volatile__ ("stcr %0, cr19" :: "r"(ossr2)); \
__asm__ __volatile__ ("stcr %0, cr20" :: "r"(ossr3)); \
sysbug_vector(); \
}
static void
bugpcrlf(void)
{
BUGCTXT();
MVMEPROM_CALL(MVMEPROM_OUTCRLF);
OSCTXT();
}
void
buginit()
{
__asm__ __volatile__ ("ldcr %0, cr17" : "=r" (bugsr0));
__asm__ __volatile__ ("ldcr %0, cr18" : "=r" (bugsr1));
__asm__ __volatile__ ("ldcr %0, cr19" : "=r" (bugsr2));
__asm__ __volatile__ ("ldcr %0, cr20" : "=r" (bugsr3));
}
char
buginchr(void)
{
register int cc;
int ret;
BUGCTXT();
MVMEPROM_CALL(MVMEPROM_INCHR);
__asm__ __volatile__ ("or %0,r0,r2" : "=r" (cc) : );
ret = cc;
OSCTXT();
return ((char)ret & 0xFF);
}
void
bugoutchr(unsigned char c)
{
unsigned char cc;
if ((cc = c) == '\n') {
bugpcrlf();
return;
}
BUGCTXT();
__asm__ __volatile__ ("or r2,r0,%0" : : "r" (cc));
MVMEPROM_CALL(MVMEPROM_OUTCHR);
OSCTXT();
}
/* return 1 if not empty else 0 */
int
buginstat(void)
{
register int ret;
BUGCTXT();
MVMEPROM_CALL(MVMEPROM_INSTAT);
__asm__ __volatile__ ("or %0,r0,r2" : "=r" (ret) : );
OSCTXT();
return (ret & 0x4 ? 0 : 1);
}
void
bugoutstr(char *s, char *se)
{
BUGCTXT();
MVMEPROM_CALL(MVMEPROM_OUTSTR);
OSCTXT();
}
void
bugrtcrd(struct mvmeprom_time *rtc)
{
BUGCTXT();
MVMEPROM_CALL(MVMEPROM_RTC_RD);
OSCTXT();
}
void
bugreturn(void)
{
BUGCTXT();
MVMEPROM_CALL(MVMEPROM_EXIT);
OSCTXT();
}
void
bugbrdid(struct mvmeprom_brdid *id)
{
struct mvmeprom_brdid *ptr;
BUGCTXT();
MVMEPROM_CALL(MVMEPROM_GETBRDID);
__asm__ __volatile__ ("or %0,r0,r2" : "=r" (ptr) : );
OSCTXT();
bcopy(ptr, id, sizeof(struct mvmeprom_brdid));
}
|
