1 /* $NetBSD: arcbios.c,v 1.6 2002/09/06 13:18:43 gehenna 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: arcbios.c,v 1.6 2002/09/06 13:18:43 gehenna Exp $"); 41 42 #include <sys/param.h> 43 44 #include <sys/systm.h> 45 #include <dev/cons.h> 46 #include <sys/conf.h> 47 48 #include <dev/arcbios/arcbios.h> 49 #include <dev/arcbios/arcbiosvar.h> 50 51 const struct arcbios_spb *ARCBIOS_SPB; 52 const struct arcbios_fv *ARCBIOS; 53 54 char arcbios_sysid_vendor[ARCBIOS_SYSID_FIELDLEN + 1]; 55 char arcbios_sysid_product[ARCBIOS_SYSID_FIELDLEN + 1]; 56 57 char arcbios_system_identifier[64 + 1]; 58 59 int arcbios_cngetc(dev_t); 60 void arcbios_cnputc(dev_t, int); 61 62 void arcbios_fetch_system_identifier(struct arcbios_component *, 63 struct arcbios_treewalk_context *); 64 65 struct consdev arcbios_cn = { 66 NULL, NULL, arcbios_cngetc, arcbios_cnputc, nullcnpollc, NULL, 67 NODEV, CN_NORMAL, 68 }; 69 70 extern const struct cdevsw arcbios_cdevsw; 71 72 /* 73 * arcbios_init: 74 * 75 * Initialize the ARC BIOS. 76 */ 77 int 78 arcbios_init(vaddr_t pblkva) 79 { 80 int maj; 81 struct arcbios_sysid *sid; 82 83 ARCBIOS_SPB = (struct arcbios_spb *) pblkva; 84 85 switch (ARCBIOS_SPB->SPBSignature) { 86 case ARCBIOS_SPB_SIGNATURE: 87 case ARCBIOS_SPB_SIGNATURE_1: 88 /* Okay. */ 89 break; 90 91 default: 92 /* Don't know what this is. */ 93 return (1); 94 } 95 96 /* Initialize our pointer to the firmware vector. */ 97 ARCBIOS = ARCBIOS_SPB->FirmwareVector; 98 99 /* Find the ARC BIOS console device major (needed by cnopen) */ 100 maj = cdevsw_lookup_major(&arcbios_cdevsw); 101 102 arcbios_cn.cn_dev = makedev(maj, 0); 103 104 /* Initialize the bootstrap console. */ 105 cn_tab = &arcbios_cn; 106 107 /* 108 * Fetch the system ID. 109 */ 110 sid = (*ARCBIOS->GetSystemId)(); 111 if (sid != NULL) { 112 memcpy(arcbios_sysid_vendor, sid->VendorId, 113 sizeof(sid->VendorId)); 114 arcbios_sysid_vendor[sizeof(sid->VendorId)] = '\0'; 115 116 memcpy(arcbios_sysid_product, sid->ProductId, 117 sizeof(sid->ProductId)); 118 arcbios_sysid_product[sizeof(sid->ProductId)] = '\0'; 119 } 120 121 /* 122 * Fetch the identifier string from the `system' component. 123 * Machdep code will use this to initialize the system type. 124 */ 125 arcbios_tree_walk(arcbios_fetch_system_identifier, NULL); 126 127 return (0); 128 } 129 130 void 131 arcbios_fetch_system_identifier(struct arcbios_component *node, 132 struct arcbios_treewalk_context *atc) 133 { 134 135 switch (node->Class) { 136 case COMPONENT_CLASS_SystemClass: 137 arcbios_component_id_copy(node, 138 arcbios_system_identifier, 139 sizeof(arcbios_system_identifier)); 140 atc->atc_terminate = 1; 141 break; 142 143 default: 144 break; 145 } 146 } 147 148 /**************************************************************************** 149 * ARC component tree walking routines. 150 ****************************************************************************/ 151 152 static void 153 arcbios_subtree_walk(struct arcbios_component *node, 154 void (*func)(struct arcbios_component *, struct arcbios_treewalk_context *), 155 struct arcbios_treewalk_context *atc) 156 { 157 158 for (node = (*ARCBIOS->GetChild)(node); 159 node != NULL && atc->atc_terminate == 0; 160 node = (*ARCBIOS->GetPeer)(node)) { 161 (*func)(node, atc); 162 if (atc->atc_terminate) 163 return; 164 arcbios_subtree_walk(node, func, atc); 165 } 166 } 167 168 void 169 arcbios_tree_walk(void (*func)(struct arcbios_component *, 170 struct arcbios_treewalk_context *), void *cookie) 171 { 172 struct arcbios_treewalk_context atc; 173 174 atc.atc_cookie = cookie; 175 atc.atc_terminate = 0; 176 177 arcbios_subtree_walk(NULL, func, &atc); 178 } 179 180 void 181 arcbios_component_id_copy(struct arcbios_component *node, 182 char *dst, size_t dstsize) 183 { 184 185 dstsize--; 186 if (dstsize > node->IdentifierLength) 187 dstsize = node->IdentifierLength; 188 memcpy(dst, node->Identifier, dstsize); 189 dst[dstsize] = '\0'; 190 } 191 192 /**************************************************************************** 193 * Bootstrap console routines. 194 ****************************************************************************/ 195 196 int 197 arcbios_cngetc(dev_t dev) 198 { 199 uint32_t count; 200 char c; 201 202 (*ARCBIOS->Read)(ARCBIOS_STDIN, &c, 1, &count); 203 return (c); 204 } 205 206 void 207 arcbios_cnputc(dev_t dev, int c) 208 { 209 uint32_t count; 210 char ch = c; 211 212 (*ARCBIOS->Write)(ARCBIOS_STDOUT, &ch, 1, &count); 213 } 214