fdt_machdep.c

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    1 /*-
    2  * Copyright (c) 2013 Juniper Networks, Inc.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/10.4/sys/x86/x86/fdt_machdep.c 250840 2013-05-21 03:05:49Z marcel $");
   29 
   30 #include "opt_platform.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/kernel.h>
   34 #include <sys/bus.h>
   35 #include <sys/linker.h>
   36 
   37 #include <machine/metadata.h>
   38 #include <x86/fdt.h>
   39 
   40 #include <dev/fdt/fdt_common.h>
   41 #include <dev/ofw/openfirm.h>
   42 
   43 int
   44 x86_init_fdt(void)
   45 {
   46         void *dtbp, *mdp;
   47         int error;
   48 
   49         if (OF_install(OFW_FDT, 0) == FALSE) {
   50                 error = ENXIO;
   51                 goto out;
   52         }
   53 
   54         mdp = preload_search_by_type("elf kernel");
   55         if (mdp == NULL)
   56                 mdp = preload_search_by_type("elf32 kernel");
   57         dtbp = (mdp != NULL) ? MD_FETCH(mdp, MODINFOMD_DTBP, void *) : NULL;
   58 
   59 #if defined(FDT_DTB_STATIC)
   60         /*
   61          * In case the device tree blob was not retrieved (from metadata) try
   62          * to use the statically embedded one.
   63          */
   64         if (dtbp == NULL)
   65                 dtbp = &fdt_static_dtb;
   66 #endif
   67 
   68         if (dtbp == NULL) {
   69                 error = ENOENT;
   70                 goto out;
   71         }
   72 
   73         error = OF_init(dtbp) ? ENXIO : 0;
   74 
   75  out:
   76         return (error);
   77 }

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FreeBSD/Linux Kernel Cross Reference sys/x86/x86/fdt_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/x86/x86/fdt_machdep.c