opal.c

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    1 /*-
    2  * Copyright (C) 2015 Nathan Whitehorn
    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 ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   18  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   20  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   21  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   22  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   23  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  *
   25  * $FreeBSD$
   26  */
   27 
   28 #include <dev/ofw/openfirm.h>
   29 
   30 #include "opal.h"
   31 
   32 extern uint64_t opal_entrypoint;
   33 extern uint64_t opal_data;
   34 extern uint64_t opal_msr;
   35 
   36 static int opal_initialized = 0;
   37 
   38 int
   39 opal_check(void)
   40 {
   41         phandle_t opal;
   42         cell_t val[2];
   43 
   44         if (opal_initialized)
   45                 return (0);
   46 
   47         opal = OF_finddevice("/ibm,opal");
   48         if (opal == -1)
   49                 return (ENOENT);
   50 
   51         if (!OF_hasprop(opal, "opal-base-address") ||
   52             !OF_hasprop(opal, "opal-entry-address"))
   53                 return (ENOENT);
   54 
   55         OF_getencprop(opal, "opal-base-address", val, sizeof(val));
   56         opal_data = ((uint64_t)val[0] << 32) | val[1];
   57         OF_getencprop(opal, "opal-entry-address", val, sizeof(val));
   58         opal_entrypoint = ((uint64_t)val[0] << 32) | val[1];
   59 
   60         opal_msr = mfmsr() & ~(PSL_EE | PSL_IR | PSL_DR | PSL_SE | PSL_LE);
   61 
   62         opal_initialized = 1;
   63 
   64         return (0);
   65 }

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FreeBSD/Linux Kernel Cross Reference sys/powerpc/powernv/opal.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powernv/opal.c