xref: /illumos-gate/usr/src/psm/promif/ieee1275/sun4/prom_efcode.c (revision 0250c53ad267726f2438e3c6556199a0bbf588a2)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright (c) 2000 by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /*
30  * Embedded Fcode Interpreter "get-fcode" client interfaces.
31  */
32 
33 #include <sys/promif.h>
34 #include <sys/promimpl.h>
35 
36 /*
37  * Get Fcode size, test if OBP supports this interface.
38  */
39 int
40 prom_get_fcode_size(char *str)
41 {
42 	cell_t ci[5];
43 	int rv;
44 
45 	if (prom_test("SUNW,get-fcode-size") != 0) {
46 		return (0);
47 	}
48 
49 	ci[0] = p1275_ptr2cell("SUNW,get-fcode-size");
50 	ci[1] = (cell_t)1;	/* 1 input arg: str */
51 	ci[2] = (cell_t)1;	/* 1 output result: len or zero */
52 	ci[3] = p1275_ptr2cell(str);
53 	ci[4] = (cell_t)0;
54 
55 	promif_preprom();
56 	rv = p1275_cif_handler(&ci);
57 	promif_postprom();
58 
59 	if (rv == 0)
60 		return (p1275_cell2int(ci[4]));
61 	return (0);
62 }
63 
64 /*
65  * Get Fcode into supplied buffer.
66  */
67 int
68 prom_get_fcode(char *str, char *buf)
69 {
70 	cell_t ci[6];
71 	int rv;
72 
73 	if (prom_test("SUNW,get-fcode") != 0) {
74 		return (0);
75 	}
76 
77 	ci[0] = p1275_ptr2cell("SUNW,get-fcode");
78 	ci[1] = (cell_t)2;	/* 2 input args: str + buf */
79 	ci[2] = (cell_t)1;	/* 1 output result: true or false */
80 	ci[3] = p1275_ptr2cell(buf);	/* Arg#1: buffer to put fcode */
81 	ci[4] = p1275_ptr2cell(str);	/* Arg#2: name of drop-in */
82 	ci[5] = (cell_t)0;
83 
84 	promif_preprom();
85 	rv = p1275_cif_handler(&ci);
86 	promif_postprom();
87 
88 	if (rv == 0)
89 		return (p1275_cell2int(ci[5]));
90 	return (0);
91 }
92