1/*	$NetBSD: arcbios.c,v 1.12 2008/04/28 20:23:47 martin 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 1.12 2008/04/28 20:23:47 martin 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
44const struct arcbios_spb *ARCBIOS_SPB;
45const struct arcbios_fv *ARCBIOS;
46
47char arcbios_sysid_vendor[ARCBIOS_SYSID_FIELDLEN + 1];
48char arcbios_sysid_product[ARCBIOS_SYSID_FIELDLEN + 1];
49
50char arcbios_system_identifier[64 + 1];
51
52int	arcbios_cngetc(dev_t);
53void	arcbios_cnputc(dev_t, int);
54
55void	arcbios_fetch_system_identifier(struct arcbios_component *,
56	    struct arcbios_treewalk_context *);
57
58struct consdev arcbios_cn = {
59	NULL, NULL, arcbios_cngetc, arcbios_cnputc, nullcnpollc,
60	    NULL, NULL, NULL, NODEV, CN_NORMAL,
61};
62
63extern const struct cdevsw arcbios_cdevsw;
64
65/*
66 * arcbios_init:
67 *
68 *	Initialize the ARC BIOS.
69 */
70int
71arcbios_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
123void
124arcbios_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
145static void
146arcbios_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
161void
162arcbios_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
173void
174arcbios_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
189int
190arcbios_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
199void
200arcbios_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