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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: probe.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 | \ @(#)probe.fth 2.10 04/10/06 | |
43 | \ Copyright 1985-1994 Bradley Forthware | |
44 | \ Copyright 1994-2002,2004 Sun Microsystems, Inc. All Rights Reserved | |
45 | \ Copyright Use is subject to license terms. | |
46 | ||
47 | \ Test locations for accessability. | |
48 | \ X is c , w , or l for 8, 16, or 32-bit access. | |
49 | \ | |
50 | \ Xprobe ( adr -- flag ) | |
51 | \ Read location, return false if bus error, otherwise return true. | |
52 | \ Xpeek ( adr -- false | value true ) | |
53 | \ Read location, return false if bus error, otherwise return data | |
54 | \ and true. | |
55 | \ Xpoke ( value adr -- flag ) | |
56 | \ Write location, return false if bus error, otherwise return true. | |
57 | ||
58 | headers | |
59 | ||
60 | \ tos = operation | |
61 | \ 0 = c@ | |
62 | \ 1 = w@ | |
63 | \ 2 = l@ | |
64 | \ 3 = x@ | |
65 | \ 4 = c! | |
66 | \ 5 = w! | |
67 | \ 6 = l! | |
68 | \ 7 = x! | |
69 | ||
70 | code safe-touch | |
71 | %g0 tos scr add \ get operation | |
72 | scr 3 scr sllx \ shift left for offset | |
73 | sp tos pop | |
74 | never if \ never1 | |
75 | sc2 rdpc \ delay | |
76 | scr h# 8 %g0 jmpl \ just before never2 | |
77 | tos 0 tos ldub \ c@ | |
78 | scr h# 8 %g0 jmpl \ just before never2 | |
79 | tos 0 tos lduh \ w@ | |
80 | scr h# 8 %g0 jmpl \ just before never2 | |
81 | tos 0 tos ld \ l@ | |
82 | scr h# 8 %g0 jmpl \ just before never2 | |
83 | tos 0 tos ldx \ x@ | |
84 | scr h# 10 %g0 jmpl \ just after never2 | |
85 | sc3 tos 0 stb \ c! | |
86 | scr h# 10 %g0 jmpl \ just after never2 | |
87 | sc3 tos 0 sth \ w! | |
88 | scr h# 10 %g0 jmpl \ just after never2 | |
89 | sc3 tos 0 st \ l! | |
90 | scr h# 10 %g0 jmpl \ just after never2 | |
91 | sc3 tos 0 stx \ x! | |
92 | then | |
93 | sc2 h# 4 sc2 add \ after the rdpc | |
94 | sc2 scr scr jmpl \ jump into never1 | |
95 | sp 0 sc3 ldx \ for the !s | |
96 | never if \ never2 | |
97 | #sync membar \ (delay) sync on read too | |
98 | sp 1 /n* tos ldx \ complete then get rid of | |
99 | sp 2 /n* sp add \ the two stack items | |
100 | then | |
101 | c; | |
102 | ||
103 | only forth also hidden also | |
104 | hidden definitions | |
105 | headerless | |
106 | : peeker ( adr acf -- value true | false) | |
107 | guarded-execute dup 0= if nip nip then | |
108 | ; | |
109 | : prober ( adr acf -- flag ) guarded-execute nip dup 0= if nip then ; | |
110 | : poker ( value adr acf -- flag ) \ Flag is true if success | |
111 | guarded-execute dup 0= if nip nip nip then | |
112 | ; | |
113 | ||
114 | ||
115 | headers | |
116 | forth definitions | |
117 | : cpeek ( adr -- false | value true ) 0 ['] safe-touch peeker ; | |
118 | : wpeek ( adr -- false | value true ) 1 ['] safe-touch peeker ; | |
119 | : lpeek ( adr -- false | value true ) 2 ['] safe-touch peeker ; | |
120 | 64\ : xpeek ( adr -- false | value true ) 3 ['] safe-touch peeker ; | |
121 | ||
122 | \ : peek ( adr -- false | value true ) ['] @ peeker ; | |
123 | ||
124 | : cprobe ( adr -- present-flag ) 0 ['] safe-touch prober ; | |
125 | : wprobe ( adr -- present-flag ) 1 ['] safe-touch prober ; | |
126 | : lprobe ( adr -- present-flag ) 2 ['] safe-touch prober ; | |
127 | 64\ : xprobe ( adr -- present-flag ) 3 ['] safe-touch prober ; | |
128 | ||
129 | \ : probe ( adr -- present-flag ) peek probe-fix ; | |
130 | ||
131 | : cpoke ( value adr -- flag ) 4 ['] safe-touch poker ; | |
132 | : wpoke ( value adr -- flag ) 5 ['] safe-touch poker ; | |
133 | : lpoke ( value adr -- flag ) 6 ['] safe-touch poker ; | |
134 | 64\ : xpoke ( value adr -- flag ) 7 ['] safe-touch poker ; | |
135 | only forth also definitions |