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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: dfill.fth | |
4 | \ | |
5 | \ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
6 | \ | |
7 | \ - Do no alter or remove copyright notices | |
8 | \ | |
9 | \ - Redistribution and use of this software in source and binary forms, with | |
10 | \ or without modification, are permitted provided that the following | |
11 | \ conditions are met: | |
12 | \ | |
13 | \ - Redistribution of source code must retain the above copyright notice, | |
14 | \ this list of conditions and the following disclaimer. | |
15 | \ | |
16 | \ - Redistribution in binary form must reproduce the above copyright notice, | |
17 | \ this list of conditions and the following disclaimer in the | |
18 | \ documentation and/or other materials provided with the distribution. | |
19 | \ | |
20 | \ Neither the name of Sun Microsystems, Inc. or the names of contributors | |
21 | \ may be used to endorse or promote products derived from this software | |
22 | \ without specific prior written permission. | |
23 | \ | |
24 | \ This software is provided "AS IS," without a warranty of any kind. | |
25 | \ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
26 | \ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
27 | \ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
28 | \ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
29 | \ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
30 | \ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
31 | \ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
32 | \ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
33 | \ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
34 | \ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
35 | \ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
36 | \ | |
37 | \ You acknowledge that this software is not designed, licensed or | |
38 | \ intended for use in the design, construction, operation or maintenance of | |
39 | \ any nuclear facility. | |
40 | \ | |
41 | \ ========== Copyright Header End ============================================ | |
42 | \ dfill.fth 2.5 94/05/30 | |
43 | \ Copyright 1985-1990 Bradley Forthware | |
44 | ||
45 | \ Doubleword fill. This is the fastest way of filling memory on a SPARC. | |
46 | \ This is primarily used for clearing memory to initialize the parity. | |
47 | ||
48 | headers | |
49 | code cfill (s start-addr count char -- ) | |
50 | \ char in tos | |
51 | sp 0 /n* scr nget \ count in scr | |
52 | sp 1 /n* sc1 nget \ start in sc1 | |
53 | ||
54 | ahead \ jump to the until branch | |
55 | nop | |
56 | begin | |
57 | tos sc1 scr stb | |
58 | but then | |
59 | scr 1 scr subcc | |
60 | 0< until | |
61 | nop \ Delay slot | |
62 | ||
63 | sp 2 /n* tos nget | |
64 | sp 3 /n* sp add | |
65 | c; | |
66 | ||
67 | code wfill (s start-addr count shortword -- ) | |
68 | \ char in tos | |
69 | sp 0 /n* scr nget \ count in scr | |
70 | sp 1 /n* sc1 nget \ start in sc1 | |
71 | ||
72 | ahead \ jump to the until branch | |
73 | nop | |
74 | begin | |
75 | tos sc1 scr sth | |
76 | but then | |
77 | scr 2 scr subcc | |
78 | 0< until | |
79 | nop \ Delay slot | |
80 | ||
81 | sp 2 /n* tos nget | |
82 | sp 3 /n* sp add | |
83 | c; | |
84 | ||
85 | code lfill (s start-addr count longword -- ) | |
86 | \ char in tos | |
87 | sp 0 /n* scr nget \ count in scr | |
88 | sp 1 /n* sc1 nget \ start in sc1 | |
89 | ||
90 | ahead \ jump to the until branch | |
91 | nop | |
92 | begin | |
93 | tos sc1 scr st | |
94 | but then | |
95 | scr 4 scr subcc | |
96 | 0< until | |
97 | nop \ Delay slot | |
98 | ||
99 | sp 2 /n* tos nget | |
100 | sp 3 /n* sp add | |
101 | c; | |
102 | headerless | |
103 | here lastacf - constant /lfill | |
104 | ||
105 | \ For this implementation, count must be a multiple of 32 bytes, and | |
106 | \ start-addr must be aligned on an 8-byte boundary. | |
107 | ||
108 | headers | |
109 | code dfill (s start-addr count odd-word even-word -- ) | |
110 | tos sc2 move \ even-word in sc2 | |
111 | sp sc3 pop \ odd-word in sc3 | |
112 | sp scr pop \ count in scr | |
113 | sp sc1 pop \ start in sc1 | |
114 | sp tos pop \ fix stack | |
115 | ||
116 | 64\ \ XXXX merge sc2 and sc3 into sc2 XXXXX | |
117 | ||
118 | scr 0 cmp | |
119 | <> if | |
120 | nop | |
121 | begin | |
122 | 32\ sc2 sc1 0 std | |
123 | 64\ sc2 sc1 0 stx | |
124 | scr d# 32 scr subcc \ Try to fill pipeline interlocks | |
125 | 32\ sc2 sc1 8 std | |
126 | 64\ sc2 sc1 8 stx | |
127 | sc1 d# 32 sc1 add | |
128 | 32\ sc2 sc1 d# -16 std | |
129 | 64\ sc2 sc1 d# -16 stx | |
130 | 0<= until | |
131 | 32\ sc2 sc1 d# -08 std | |
132 | 64\ sc2 sc1 d# -08 stx | |
133 | then | |
134 | c; | |
135 | headerless | |
136 | here lastacf - constant /dfill | |
137 | ||
138 | \ We can also scrub parity errors by reading and writing memory. | |
139 | \ This is slower than just clearing it, but it preserves the previous | |
140 | \ contents, which is nice after Unix has crashed | |
141 | ||
142 | code ltouch ( adr len -- ) | |
143 | tos sc1 move \ count in sc1 | |
144 | sp sc2 pop \ adr in sc2 | |
145 | sp tos pop | |
146 | ||
147 | sc1 0 cmp | |
148 | <> if | |
149 | nop | |
150 | ||
151 | begin | |
152 | sc1 4 sc1 subcc | |
153 | sc2 sc1 sc4 ld | |
154 | 0<= until | |
155 | sc4 sc2 sc1 st | |
156 | ||
157 | then | |
158 | c; | |
159 | here lastacf - constant /ltouch | |
160 | ||
161 | code dtouch ( adr len -- ) | |
162 | tos sc1 move \ count in sc1 | |
163 | sp sc2 pop \ adr in sc2 | |
164 | sp tos pop | |
165 | ||
166 | sc1 0 cmp | |
167 | <> if | |
168 | nop | |
169 | ||
170 | begin | |
171 | sc1 8 sc1 subcc | |
172 | 32\ sc2 sc1 sc4 ldd | |
173 | 64\ sc2 sc1 sc4 ldx | |
174 | 0<= until | |
175 | 32\ sc4 sc2 sc1 std | |
176 | 64\ sc4 sc2 sc1 stx | |
177 | ||
178 | then | |
179 | c; | |
180 | here lastacf - constant /dtouch | |
181 | headers |