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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * Hypervisor Software File: prom_prop.c | |
5 | * | |
6 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
7 | * | |
8 | * - Do no alter or remove copyright notices | |
9 | * | |
10 | * - Redistribution and use of this software in source and binary forms, with | |
11 | * or without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistribution of source code must retain the above copyright notice, | |
15 | * this list of conditions and the following disclaimer. | |
16 | * | |
17 | * - Redistribution in binary form must reproduce the above copyright notice, | |
18 | * this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * | |
21 | * Neither the name of Sun Microsystems, Inc. or the names of contributors | |
22 | * may be used to endorse or promote products derived from this software | |
23 | * without specific prior written permission. | |
24 | * | |
25 | * This software is provided "AS IS," without a warranty of any kind. | |
26 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
27 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
28 | * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
29 | * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
30 | * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
31 | * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
32 | * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
33 | * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
34 | * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
35 | * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
36 | * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
37 | * | |
38 | * You acknowledge that this software is not designed, licensed or | |
39 | * intended for use in the design, construction, operation or maintenance of | |
40 | * any nuclear facility. | |
41 | * | |
42 | * ========== Copyright Header End ============================================ | |
43 | */ | |
44 | /* | |
45 | * Copyright (c) 2000-2003 Sun Microsystems, Inc. | |
46 | * All rights reserved. | |
47 | * Use is subject to license terms. | |
48 | */ | |
49 | ||
50 | #pragma ident "@(#)prom_prop.c 1.1 00/08/07 SMI" | |
51 | ||
52 | #include <sys/promif.h> | |
53 | #include <sys/promimpl.h> | |
54 | ||
55 | int | |
56 | prom_getproplen(phandle_t nodeid, caddr_t name) | |
57 | { | |
58 | cell_t ci[6]; | |
59 | ||
60 | ci[0] = p1275_ptr2cell("getproplen"); /* Service name */ | |
61 | ci[1] = (cell_t)2; /* #argument cells */ | |
62 | ci[2] = (cell_t)1; /* #return cells */ | |
63 | ci[3] = p1275_phandle2cell(nodeid); /* Arg1: package */ | |
64 | ci[4] = p1275_ptr2cell(name); /* Arg2: Property name */ | |
65 | ci[5] = (cell_t)-1; /* Res1: Prime result */ | |
66 | ||
67 | (void) p1275_cif_handler(&ci); | |
68 | ||
69 | return (p1275_cell2int(ci[5])); /* Res1: Property length */ | |
70 | } | |
71 | ||
72 | int | |
73 | prom_getprop(phandle_t nodeid, caddr_t name, caddr_t buf) | |
74 | { | |
75 | int32_t len, rv; | |
76 | cell_t ci[8]; | |
77 | ||
78 | /* | |
79 | * This function assumes the buffer is large enough to | |
80 | * hold the result, so we pass in the length of the | |
81 | * property as the length of the buffer. | |
82 | * | |
83 | * Note that we ignore the "length" result of the service. | |
84 | */ | |
85 | ||
86 | if ((len = prom_getproplen(nodeid, name)) <= 0) | |
87 | return (len); | |
88 | ||
89 | ci[0] = p1275_ptr2cell("getprop"); /* Service name */ | |
90 | ci[1] = (cell_t)4; /* #argument cells */ | |
91 | ci[2] = (cell_t)0; /* #result cells */ | |
92 | ci[3] = p1275_phandle2cell(nodeid); /* Arg1: package */ | |
93 | ci[4] = p1275_ptr2cell(name); /* Arg2: property name */ | |
94 | ci[5] = p1275_ptr2cell(buf); /* Arg3: buffer address */ | |
95 | ci[6] = len; /* Arg4: buf len (assumed) */ | |
96 | ||
97 | rv = p1275_cif_handler(&ci); | |
98 | ||
99 | if (rv != 0) | |
100 | return (-1); | |
101 | return (len); /* Return known length */ | |
102 | } | |
103 | ||
104 | int | |
105 | prom_bounded_getprop(phandle_t nodeid, caddr_t name, caddr_t buf, | |
106 | int32_t buflen) | |
107 | { | |
108 | cell_t ci[8]; | |
109 | ||
110 | ci[0] = p1275_ptr2cell("getprop"); /* Service name */ | |
111 | ci[1] = (cell_t)4; /* #argument cells */ | |
112 | ci[2] = (cell_t)1; /* #result cells */ | |
113 | ci[3] = p1275_phandle2cell(nodeid); /* Arg1: package */ | |
114 | ci[4] = p1275_ptr2cell(name); /* Arg2: property name */ | |
115 | ci[5] = p1275_ptr2cell(buf); /* Arg3: buffer address */ | |
116 | ci[6] = p1275_int2cell(buflen); /* Arg4: buffer length */ | |
117 | ci[7] = (cell_t)-1; /* Res1: Prime result */ | |
118 | ||
119 | (void) p1275_cif_handler(&ci); | |
120 | ||
121 | return (p1275_cell2int(ci[7])); /* Res1: Returned length */ | |
122 | } | |
123 | ||
124 | int | |
125 | prom_nextprop(phandle_t nodeid, caddr_t previous, caddr_t next) | |
126 | { | |
127 | cell_t ci[7]; | |
128 | ||
129 | (void) prom_strcpy(next, ""); /* Prime result, in case call fails */ | |
130 | ||
131 | ci[0] = p1275_ptr2cell("nextprop"); /* Service name */ | |
132 | ci[1] = (cell_t)3; /* #argument cells */ | |
133 | ci[2] = (cell_t)1; /* #result cells */ | |
134 | ci[3] = p1275_phandle2cell(nodeid); /* Arg1: phandle */ | |
135 | ci[4] = p1275_ptr2cell(previous); /* Arg2: addr of prev name */ | |
136 | ci[5] = p1275_ptr2cell(next); /* Arg3: addr of 32 byte buf */ | |
137 | ci[6] = -1; | |
138 | ||
139 | (void) p1275_cif_handler(&ci); | |
140 | ||
141 | return (p1275_cell2int(ci[6])); | |
142 | } | |
143 | ||
144 | int | |
145 | prom_setprop(phandle_t nodeid, caddr_t name, caddr_t buf, int32_t buflen) | |
146 | { | |
147 | cell_t ci[8]; | |
148 | ||
149 | ci[0] = p1275_ptr2cell("setprop"); /* Service name */ | |
150 | ci[1] = (cell_t)4; /* #argument cells */ | |
151 | ci[2] = (cell_t)1; /* #result cells */ | |
152 | ci[3] = p1275_phandle2cell(nodeid); /* Arg1: phandle */ | |
153 | ci[4] = p1275_ptr2cell(name); /* Arg2: property name */ | |
154 | ci[5] = p1275_ptr2cell(buf); /* Arg3: New value ptr */ | |
155 | ci[6] = p1275_int2cell(buflen); /* Arg4: New value len */ | |
156 | ci[7] = (cell_t)-1; /* Res1: Prime result */ | |
157 | ||
158 | (void) p1275_cif_handler(&ci); | |
159 | ||
160 | return (p1275_cell2int(ci[7])); /* Res1: Actual new size */ | |
161 | } | |
162 | ||
163 | /* | |
164 | * prom_decode_composite_string: | |
165 | * | |
166 | * Returns successive strings in a composite string property. | |
167 | * A composite string property is a buffer containing one or more | |
168 | * NULL terminated strings contained within the length of the buffer. | |
169 | * | |
170 | * Always call with the base address and length of the property buffer. | |
171 | * On the first call, call with prev == 0, call successively | |
172 | * with prev set to the last value returned from this function | |
173 | * until the routine returns zero which means no more string values. | |
174 | */ | |
175 | char * | |
176 | prom_decode_composite_string(void *buf, size_t buflen, char *prev) | |
177 | { | |
178 | if ((buf == 0) || (buflen == 0) || ((int)buflen == -1)) | |
179 | return ((char *)0); | |
180 | ||
181 | if (prev == 0) | |
182 | return ((char *)buf); | |
183 | ||
184 | prev += prom_strlen(prev) + 1; | |
185 | if (prev >= ((char *)buf + buflen)) | |
186 | return ((char *)0); | |
187 | return (prev); | |
188 | } |