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 26 #include <dev/ofw/openfirm.h> 27 28 #include "opal.h" 29 30 extern uint64_t opal_entrypoint; 31 extern uint64_t opal_data; 32 extern uint64_t opal_msr; 33 34 static int opal_initialized = 0; 35 36 int 37 opal_check(void) 38 { 39 phandle_t opal; 40 cell_t val[2]; 41 42 if (opal_initialized) 43 return (0); 44 45 opal = OF_finddevice("/ibm,opal"); 46 if (opal == -1) 47 return (ENOENT); 48 49 if (!OF_hasprop(opal, "opal-base-address") || 50 !OF_hasprop(opal, "opal-entry-address")) 51 return (ENOENT); 52 53 OF_getencprop(opal, "opal-base-address", val, sizeof(val)); 54 opal_data = ((uint64_t)val[0] << 32) | val[1]; 55 OF_getencprop(opal, "opal-entry-address", val, sizeof(val)); 56 opal_entrypoint = ((uint64_t)val[0] << 32) | val[1]; 57 58 opal_msr = mfmsr() & ~(PSL_EE | PSL_IR | PSL_DR | PSL_SE | PSL_LE); 59 60 opal_initialized = 1; 61 62 return (0); 63 } 64