1 /* $NetBSD: arcbios.c,v 1.13 2011/02/20 08:02:46 matt Exp $ */
2
3 /*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: arcbios.c,v 1.13 2011/02/20 08:02:46 matt Exp $");
34
35 #include <sys/param.h>
36
37 #include <sys/systm.h>
38 #include <dev/cons.h>
39 #include <sys/conf.h>
40
41 #include <dev/arcbios/arcbios.h>
42 #include <dev/arcbios/arcbiosvar.h>
43
44 const struct arcbios_spb *ARCBIOS_SPB;
45 const struct arcbios_fv *ARCBIOS;
46
47 char arcbios_sysid_vendor[ARCBIOS_SYSID_FIELDLEN + 1];
48 char arcbios_sysid_product[ARCBIOS_SYSID_FIELDLEN + 1];
49
50 char arcbios_system_identifier[64 + 1];
51
52 int arcbios_cngetc(dev_t);
53 void arcbios_cnputc(dev_t, int);
54
55 void arcbios_fetch_system_identifier(struct arcbios_component *,
56 struct arcbios_treewalk_context *);
57
58 struct consdev arcbios_cn = {
59 NULL, NULL, arcbios_cngetc, arcbios_cnputc, nullcnpollc,
60 NULL, NULL, NULL, NODEV, CN_NORMAL,
61 };
62
63 extern const struct cdevsw arcbios_cdevsw;
64
65 /*
66 * arcbios_init:
67 *
68 * Initialize the ARC BIOS.
69 */
70 int
arcbios_init(vaddr_t pblkva)71 arcbios_init(vaddr_t pblkva)
72 {
73 int maj;
74 struct arcbios_sysid *sid;
75
76 ARCBIOS_SPB = (struct arcbios_spb *) pblkva;
77
78 switch (ARCBIOS_SPB->SPBSignature) {
79 case ARCBIOS_SPB_SIGNATURE:
80 case ARCBIOS_SPB_SIGNATURE_1:
81 /* Okay. */
82 break;
83
84 default:
85 /* Don't know what this is. */
86 return (1);
87 }
88
89 /* Initialize our pointer to the firmware vector. */
90 ARCBIOS = (void *)(intptr_t)ARCBIOS_SPB->FirmwareVector;
91
92 /* Find the ARC BIOS console device major (needed by cnopen) */
93 maj = cdevsw_lookup_major(&arcbios_cdevsw);
94
95 arcbios_cn.cn_dev = makedev(maj, 0);
96
97 /* Initialize the bootstrap console. */
98 cn_tab = &arcbios_cn;
99
100 /*
101 * Fetch the system ID.
102 */
103 sid = arcbios_GetSystemId();
104 if (sid != NULL) {
105 memcpy(arcbios_sysid_vendor, sid->VendorId,
106 sizeof(sid->VendorId));
107 arcbios_sysid_vendor[sizeof(sid->VendorId)] = '\0';
108
109 memcpy(arcbios_sysid_product, sid->ProductId,
110 sizeof(sid->ProductId));
111 arcbios_sysid_product[sizeof(sid->ProductId)] = '\0';
112 }
113
114 /*
115 * Fetch the identifier string from the `system' component.
116 * Machdep code will use this to initialize the system type.
117 */
118 arcbios_tree_walk(arcbios_fetch_system_identifier, NULL);
119
120 return (0);
121 }
122
123 void
arcbios_fetch_system_identifier(struct arcbios_component * node,struct arcbios_treewalk_context * atc)124 arcbios_fetch_system_identifier(struct arcbios_component *node,
125 struct arcbios_treewalk_context *atc)
126 {
127
128 switch (node->Class) {
129 case COMPONENT_CLASS_SystemClass:
130 arcbios_component_id_copy(node,
131 arcbios_system_identifier,
132 sizeof(arcbios_system_identifier));
133 atc->atc_terminate = 1;
134 break;
135
136 default:
137 break;
138 }
139 }
140
141 /****************************************************************************
142 * ARC component tree walking routines.
143 ****************************************************************************/
144
145 static void
arcbios_subtree_walk(struct arcbios_component * node,void (* func)(struct arcbios_component *,struct arcbios_treewalk_context *),struct arcbios_treewalk_context * atc)146 arcbios_subtree_walk(struct arcbios_component *node,
147 void (*func)(struct arcbios_component *, struct arcbios_treewalk_context *),
148 struct arcbios_treewalk_context *atc)
149 {
150
151 for (node = arcbios_GetChild(node);
152 node != NULL && atc->atc_terminate == 0;
153 node = arcbios_GetPeer(node)) {
154 (*func)(node, atc);
155 if (atc->atc_terminate)
156 return;
157 arcbios_subtree_walk(node, func, atc);
158 }
159 }
160
161 void
arcbios_tree_walk(void (* func)(struct arcbios_component *,struct arcbios_treewalk_context *),void * cookie)162 arcbios_tree_walk(void (*func)(struct arcbios_component *,
163 struct arcbios_treewalk_context *), void *cookie)
164 {
165 struct arcbios_treewalk_context atc;
166
167 atc.atc_cookie = cookie;
168 atc.atc_terminate = 0;
169
170 arcbios_subtree_walk(NULL, func, &atc);
171 }
172
173 void
arcbios_component_id_copy(struct arcbios_component * node,char * dst,size_t dstsize)174 arcbios_component_id_copy(struct arcbios_component *node,
175 char *dst, size_t dstsize)
176 {
177
178 dstsize--;
179 if (dstsize > node->IdentifierLength)
180 dstsize = node->IdentifierLength;
181 memcpy(dst, (void *)(intptr_t)node->Identifier, dstsize);
182 dst[dstsize] = '\0';
183 }
184
185 /****************************************************************************
186 * Bootstrap console routines.
187 ****************************************************************************/
188
189 int
arcbios_cngetc(dev_t dev)190 arcbios_cngetc(dev_t dev)
191 {
192 u_long count;
193 char c;
194
195 arcbios_Read(ARCBIOS_STDIN, &c, 1, &count);
196 return (c);
197 }
198
199 void
arcbios_cnputc(dev_t dev,int c)200 arcbios_cnputc(dev_t dev, int c)
201 {
202 u_long count;
203 char ch = c;
204
205 arcbios_Write(ARCBIOS_STDOUT, &ch, 1, &count);
206 }
207