util/msrtool/darwin.c

   1 /*
   2  * This file is part of msrtool.
   3  *
   4  * Copyright (c) 2009 coresystems GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <fcntl.h>
  23 #include <unistd.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include "msrtool.h"
  28
  29 /* This Darwin support requires DirectHW, which is available at
  30  * http://www.coreboot.org/DirectHW
  31  */
  32
  33 int darwin_probe(const struct sysdef *system)
  34 {
  35 #ifdef __DARWIN__
  36         return iopl(3) == 0;
  37 #else
  38         return 0;
  39 #endif
  40 }
  41
  42 int darwin_open(uint8_t cpu, enum SysModes mode)
  43 {
  44 #ifdef __DARWIN__
  45         if (cpu > 0) {
  46                 fprintf(stderr, "%s: only core 0 is supported on Mac OS X right now.\n", __func__);
  47                 return 0;
  48         }
  49         return 1;
  50 #else
  51         return 0;
  52 #endif
  53 }
  54
  55 int darwin_close(uint8_t cpu)
  56 {
  57         return 1;
  58 }
  59
  60 int darwin_rdmsr(uint8_t cpu, uint32_t addr, struct msr *val)
  61 {
  62 #ifdef __DARWIN__
  63         msr_t msr;
  64
  65         msr = rdmsr(addr);
  66
  67         val->hi = msr.lo;
  68         val->lo = msr.hi;
  69         return 1;
  70 #else
  71         return 0;
  72 #endif
  73 }