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64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/*-
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* Copyright (C) 2015 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <dev/ofw/openfirm.h>
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#include "opal.h"
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extern uint64_t opal_entrypoint;
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extern uint64_t opal_data;
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extern uint64_t opal_msr;
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static int opal_initialized = 0;
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int
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opal_check(void)
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{
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phandle_t opal;
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cell_t val[2];
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if (opal_initialized)
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return (0);
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opal = OF_finddevice("/ibm,opal");
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if (opal == -1)
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return (ENOENT);
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if (!OF_hasprop(opal, "opal-base-address") ||
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!OF_hasprop(opal, "opal-entry-address"))
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return (ENOENT);
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OF_getencprop(opal, "opal-base-address", val, sizeof(val));
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opal_data = ((uint64_t)val[0] << 32) | val[1];
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OF_getencprop(opal, "opal-entry-address", val, sizeof(val));
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opal_entrypoint = ((uint64_t)val[0] << 32) | val[1];
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opal_msr = mfmsr() & ~(PSL_EE | PSL_IR | PSL_DR | PSL_SE | PSL_LE);
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opal_initialized = 1;
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return (0);
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}
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