sys/dev/arcbios/arcbios.c

   1 /*      $NetBSD: arcbios.c,v 1.11 2005/12/11 12:21:14 christos 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 1.11 2005/12/11 12:21:14 christos 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
  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 = 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
 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
 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
 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
 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, node->Identifier, dstsize);
 182         dst[dstsize] = '\0';
 183 }
 184
 185 /****************************************************************************
 186  * Bootstrap console routines.
 187  ****************************************************************************/
 188
 189 int
 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
 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 }