freebsd-dev/sys/powerpc/powernv/opal.c

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/*-
* Copyright (C) 2015 Nathan Whitehorn
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 TOOLS GMBH 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.
*
* $FreeBSD$
*/
#include <dev/ofw/openfirm.h>
#include "opal.h"
extern uint64_t opal_entrypoint;
extern uint64_t opal_data;
extern uint64_t opal_msr;
static int opal_initialized = 0;
int
opal_check(void)
{
phandle_t opal;
cell_t val[2];
if (opal_initialized)
return (0);
opal = OF_finddevice("/ibm,opal");
if (opal == -1)
return (ENOENT);
if (!OF_hasprop(opal, "opal-base-address") ||
!OF_hasprop(opal, "opal-entry-address"))
return (ENOENT);
OF_getencprop(opal, "opal-base-address", val, sizeof(val));
opal_data = ((uint64_t)val[0] << 32) | val[1];
OF_getencprop(opal, "opal-entry-address", val, sizeof(val));
opal_entrypoint = ((uint64_t)val[0] << 32) | val[1];
opal_msr = mfmsr() & ~(PSL_EE | PSL_IR | PSL_DR | PSL_SE);
opal_initialized = 1;
return (0);
}