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
|
/*
* cpu32bug.S -- board support for the CPU32BUG monitor.
*
* Copyright (c) 1995, 1996 Cygnus Support
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include "asm.h"
#include "cpu32bug.h"
.title "cpu32bug.S for m68k-coff"
.text
.global SYM (_exit)
.global SYM (outln)
.global SYM (outbyte)
.global SYM (putDebugChar)
.global SYM (inbyte)
.global SYM (getDebugChar)
.global SYM (havebyte)
/*
* _exit -- Exit from the application. Normally we cause a user trap
* to return to the ROM monitor for another run.
*/
.text
.align 2
SYM (_exit):
link fp, IMM(0)
trap IMM(15)
.word RETURN
/*
* inbyte -- get a byte from the serial port
* d0 - contains the byte read in
*/
.text
.align 2
SYM (getDebugChar): /* symbol name used by m68k-stub */
SYM (inbyte):
link fp, IMM(-8)
trap IMM(15)
.word INCHR
moveb sp@, d0
extw d0
extl d0
unlk fp
rts
/*
* outbyte -- sends a byte out the serial port
* d0 - contains the byte to be sent
*/
.text
.align 2
SYM (putDebugChar): /* symbol name used by m68k-stub */
SYM (outbyte):
link fp, IMM(-4)
moveb fp@(11), sp@
trap IMM(15)
.word OUTCHR
unlk fp
rts
/*
* outln -- sends a string of bytes out the serial port with a CR/LF
* a0 - contains the address of the string's first byte
* a1 - contains the address of the string's last byte
*/
.text
.align 2
SYM (outln):
link fp, IMM(-8)
moveml a0/a1, sp@
trap IMM(15)
.word OUTLN
unlk fp
rts
/*
* outstr -- sends a string of bytes out the serial port without a CR/LF
* a0 - contains the address of the string's first byte
* a1 - contains the address of the string's last byte
*/
.text
.align 2
SYM (outstr):
link fp, IMM(-8)
moveml a0/a1, sp@
trap IMM(15)
.word OUTSTR
unlk fp
rts
/*
* havebyte -- checks to see if there is a byte in the serial port,
* returns 1 if there is a byte, 0 otherwise.
*/
.text
.align 2
SYM (havebyte):
trap IMM(15)
.word INSTAT
beqs empty
movel IMM(1), d0
rts
empty:
movel IMM(0), d0
rts
|
