/
oktagon_io.S
195 lines (178 loc) · 3.27 KB
/
oktagon_io.S
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
/* -*- mode: asm -*-
* Due to problems while transferring data I've put these routines as assembly
* code.
* Since I'm no PPC assembler guru, the code is just the assembler version of
int oktag_to_io(long *paddr,long *addr,long len)
{
long *addr2 = addr;
for(len=(len+sizeof(long)-1)/sizeof(long);len--;)
*paddr = *addr2++;
return addr2 - addr;
}
int oktag_from_io(long *addr,long *paddr,long len)
{
long *addr2 = addr;
for(len=(len+sizeof(long)-1)/sizeof(long);len--;)
*addr2++ = *paddr;
return addr2 - addr;
}
* assembled using gcc -O2 -S, with two exception catch points where data
* is moved to/from the IO register.
*/
#include <linux/config.h>
#ifdef CONFIG_APUS
.file "oktagon_io.c"
gcc2_compiled.:
/*
.section ".text"
*/
.align 2
.globl oktag_to_io
.type oktag_to_io,@function
oktag_to_io:
addi 5,5,3
srwi 5,5,2
cmpwi 1,5,0
mr 9,3
mr 3,4
addi 5,5,-1
bc 12,6,.L3
.L5:
cmpwi 1,5,0
lwz 0,0(3)
addi 3,3,4
addi 5,5,-1
exp1: stw 0,0(9)
bc 4,6,.L5
.L3:
ret1: subf 3,4,3
srawi 3,3,2
blr
.Lfe1:
.size oktag_to_io,.Lfe1-oktag_to_io
.align 2
.globl oktag_from_io
.type oktag_from_io,@function
oktag_from_io:
addi 5,5,3
srwi 5,5,2
cmpwi 1,5,0
mr 9,3
addi 5,5,-1
bc 12,6,.L9
.L11:
cmpwi 1,5,0
exp2: lwz 0,0(4)
addi 5,5,-1
stw 0,0(3)
addi 3,3,4
bc 4,6,.L11
.L9:
ret2: subf 3,9,3
srawi 3,3,2
blr
.Lfe2:
.size oktag_from_io,.Lfe2-oktag_from_io
.ident "GCC: (GNU) egcs-2.90.29 980515 (egcs-1.0.3 release)"
/*
* Exception table.
* Second longword shows where to jump when an exception at the addr the first
* longword is pointing to is caught.
*/
.section __ex_table,"a"
.align 2
oktagon_except:
.long exp1,ret1
.long exp2,ret2
#else
/*
The code which follows is for 680x0 based assembler and is meant for
Linux/m68k. It was created by cross compiling the code using the
instructions given above. I then added the four labels used in the
exception handler table at the bottom of this file.
- Kevin <kcozens@interlog.com>
*/
#ifdef CONFIG_AMIGA
.file "oktagon_io.c"
.version "01.01"
gcc2_compiled.:
.text
.align 2
.globl oktag_to_io
.type oktag_to_io,@function
oktag_to_io:
link.w %a6,#0
move.l %d2,-(%sp)
move.l 8(%a6),%a1
move.l 12(%a6),%d1
move.l %d1,%a0
move.l 16(%a6),%d0
addq.l #3,%d0
lsr.l #2,%d0
subq.l #1,%d0
moveq.l #-1,%d2
cmp.l %d0,%d2
jbeq .L3
.L5:
exp1:
move.l (%a0)+,(%a1)
dbra %d0,.L5
clr.w %d0
subq.l #1,%d0
jbcc .L5
.L3:
ret1:
move.l %a0,%d0
sub.l %d1,%d0
asr.l #2,%d0
move.l -4(%a6),%d2
unlk %a6
rts
.Lfe1:
.size oktag_to_io,.Lfe1-oktag_to_io
.align 2
.globl oktag_from_io
.type oktag_from_io,@function
oktag_from_io:
link.w %a6,#0
move.l %d2,-(%sp)
move.l 8(%a6),%d1
move.l 12(%a6),%a1
move.l %d1,%a0
move.l 16(%a6),%d0
addq.l #3,%d0
lsr.l #2,%d0
subq.l #1,%d0
moveq.l #-1,%d2
cmp.l %d0,%d2
jbeq .L9
.L11:
exp2:
move.l (%a1),(%a0)+
dbra %d0,.L11
clr.w %d0
subq.l #1,%d0
jbcc .L11
.L9:
ret2:
move.l %a0,%d0
sub.l %d1,%d0
asr.l #2,%d0
move.l -4(%a6),%d2
unlk %a6
rts
.Lfe2:
.size oktag_from_io,.Lfe2-oktag_from_io
.ident "GCC: (GNU) 2.7.2.1"
/*
* Exception table.
* Second longword shows where to jump when an exception at the addr the first
* longword is pointing to is caught.
*/
.section __ex_table,"a"
.align 2
oktagon_except:
.long exp1,ret1
.long exp2,ret2
#endif
#endif