FreeBSD/Linux Kernel Cross Reference
sys/dev/arcbios/arcbios.c

     /*      $NetBSD: arcbios.c,v 1.7 2003/03/06 07:59:37 rafal Exp $        */
     
     /*-
      * Copyright (c) 2001 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Jason R. Thorpe.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: arcbios.c,v 1.7 2003/03/06 07:59:37 rafal Exp $");
    
    #include <sys/param.h>
    
    #include <sys/systm.h>
    #include <dev/cons.h>
    #include <sys/conf.h>
    
    #include <dev/arcbios/arcbios.h>
    #include <dev/arcbios/arcbiosvar.h>
    
    const struct arcbios_spb *ARCBIOS_SPB;
    const struct arcbios_fv *ARCBIOS;
    
    char arcbios_sysid_vendor[ARCBIOS_SYSID_FIELDLEN + 1];
    char arcbios_sysid_product[ARCBIOS_SYSID_FIELDLEN + 1];
    
    char arcbios_system_identifier[64 + 1];
    
    int     arcbios_cngetc(dev_t);
    void    arcbios_cnputc(dev_t, int);
    
    void    arcbios_fetch_system_identifier(struct arcbios_component *,
                struct arcbios_treewalk_context *);
    
    struct consdev arcbios_cn = {
            NULL, NULL, arcbios_cngetc, arcbios_cnputc, nullcnpollc, 
                NULL, NULL, NULL, NODEV, CN_NORMAL,
    };
    
    extern const struct cdevsw arcbios_cdevsw;
    
    /*
     * arcbios_init:
     *
     *      Initialize the ARC BIOS.
     */
    int
    arcbios_init(vaddr_t pblkva)
    {
            int maj;
            struct arcbios_sysid *sid;
    
            ARCBIOS_SPB = (struct arcbios_spb *) pblkva;
            
            switch (ARCBIOS_SPB->SPBSignature) {
            case ARCBIOS_SPB_SIGNATURE:
            case ARCBIOS_SPB_SIGNATURE_1:
                    /* Okay. */
                    break;
    
            default:
                    /* Don't know what this is. */
                    return (1);
            }
    
            /* Initialize our pointer to the firmware vector. */
            ARCBIOS = ARCBIOS_SPB->FirmwareVector;
    
            /* Find the ARC BIOS console device major (needed by cnopen) */
           maj = cdevsw_lookup_major(&arcbios_cdevsw);
   
           arcbios_cn.cn_dev = makedev(maj, 0);
   
           /* Initialize the bootstrap console. */
           cn_tab = &arcbios_cn;
   
           /*
            * Fetch the system ID.
            */
           sid = (*ARCBIOS->GetSystemId)();
           if (sid != NULL) {
                   memcpy(arcbios_sysid_vendor, sid->VendorId,
                       sizeof(sid->VendorId));
                   arcbios_sysid_vendor[sizeof(sid->VendorId)] = '\0';
   
                   memcpy(arcbios_sysid_product, sid->ProductId,
                       sizeof(sid->ProductId));
                   arcbios_sysid_product[sizeof(sid->ProductId)] = '\0';
           }
   
           /*
            * Fetch the identifier string from the `system' component.
            * Machdep code will use this to initialize the system type.
            */
           arcbios_tree_walk(arcbios_fetch_system_identifier, NULL);
   
           return (0);
   }
   
   void
   arcbios_fetch_system_identifier(struct arcbios_component *node,
       struct arcbios_treewalk_context *atc)
   {
   
           switch (node->Class) {
           case COMPONENT_CLASS_SystemClass:
                   arcbios_component_id_copy(node,
                       arcbios_system_identifier,
                       sizeof(arcbios_system_identifier));
                   atc->atc_terminate = 1;
                   break;
   
           default:
                   break;
           }
   }
   
   /****************************************************************************
    * ARC component tree walking routines.
    ****************************************************************************/
   
   static void
   arcbios_subtree_walk(struct arcbios_component *node,
       void (*func)(struct arcbios_component *, struct arcbios_treewalk_context *),
       struct arcbios_treewalk_context *atc)
   {
   
           for (node = (*ARCBIOS->GetChild)(node);
                node != NULL && atc->atc_terminate == 0;
                node = (*ARCBIOS->GetPeer)(node)) {
                   (*func)(node, atc);
                   if (atc->atc_terminate)
                           return;
                   arcbios_subtree_walk(node, func, atc);
           }
   }
   
   void
   arcbios_tree_walk(void (*func)(struct arcbios_component *,
       struct arcbios_treewalk_context *), void *cookie)
   {
           struct arcbios_treewalk_context atc;
   
           atc.atc_cookie = cookie;
           atc.atc_terminate = 0;
   
           arcbios_subtree_walk(NULL, func, &atc);
   }
   
   void
   arcbios_component_id_copy(struct arcbios_component *node,
       char *dst, size_t dstsize)
   {
   
           dstsize--;
           if (dstsize > node->IdentifierLength)
                   dstsize = node->IdentifierLength;
           memcpy(dst, node->Identifier, dstsize);
           dst[dstsize] = '\0';
   }
   
   /****************************************************************************
    * Bootstrap console routines.
    ****************************************************************************/
   
   int
   arcbios_cngetc(dev_t dev)
   {
           uint32_t count;
           char c;
   
           (*ARCBIOS->Read)(ARCBIOS_STDIN, &c, 1, &count);
           return (c);
   }
   
   void
   arcbios_cnputc(dev_t dev, int c)
   {
           uint32_t count;
           char ch = c;
   
           (*ARCBIOS->Write)(ARCBIOS_STDOUT, &ch, 1, &count);
   }

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