sysdeps/s390/dl-procinfo.h

   1 /* s390 version of processor capability information handling macros.
   2    Copyright (C) 2006-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2006.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _DL_PROCINFO_H
  21 #define _DL_PROCINFO_H  1
  22 #include <ldsodefs.h>
  23
  24 #define _DL_HWCAP_COUNT 12
  25
  26 #define _DL_PLATFORMS_COUNT     8
  27
  28 /* The kernel provides up to 32 capability bits with elf_hwcap.  */
  29 #define _DL_FIRST_PLATFORM      32
  30 /* Mask to filter out platforms.  */
  31 #define _DL_HWCAP_PLATFORM      (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
  32                                  << _DL_FIRST_PLATFORM)
  33
  34 /* Hardware capability bit numbers are derived directly from the
  35    facility indications as stored by the "store facility list" (STFL)
  36    instruction.
  37    highgprs is an alien in that list.  It describes a *kernel*
  38    capability.  */
  39
  40 enum
  41 {
  42   HWCAP_S390_ESAN3 = 1 << 0,
  43   HWCAP_S390_ZARCH = 1 << 1,
  44   HWCAP_S390_STFLE = 1 << 2,
  45   HWCAP_S390_MSA = 1 << 3,
  46   HWCAP_S390_LDISP = 1 << 4,
  47   HWCAP_S390_EIMM = 1 << 5,
  48   HWCAP_S390_DFP = 1 << 6,
  49   HWCAP_S390_HPAGE = 1 << 7,
  50   HWCAP_S390_ETF3EH = 1 << 8,
  51   HWCAP_S390_HIGH_GPRS = 1 << 9,
  52   HWCAP_S390_TE = 1 << 10,
  53   HWCAP_S390_VX = 1 << 11,
  54 };
  55
  56 #define HWCAP_IMPORTANT (HWCAP_S390_ZARCH | HWCAP_S390_LDISP \
  57                           | HWCAP_S390_EIMM | HWCAP_S390_DFP)
  58
  59 /* We cannot provide a general printing function.  */
  60 #define _dl_procinfo(type, word) -1
  61
  62 static inline const char *
  63 __attribute__ ((unused))
  64 _dl_hwcap_string (int idx)
  65 {
  66   return GLRO(dl_s390_cap_flags)[idx];
  67 };
  68
  69 static inline const char *
  70 __attribute__ ((unused))
  71 _dl_platform_string (int idx)
  72 {
  73   return GLRO(dl_s390_platforms)[idx - _DL_FIRST_PLATFORM];
  74 };
  75
  76 static inline int
  77 __attribute__ ((unused, always_inline))
  78 _dl_string_hwcap (const char *str)
  79 {
  80   int i;
  81
  82   for (i = 0; i < _DL_HWCAP_COUNT; i++)
  83     {
  84       if (strcmp (str, GLRO(dl_s390_cap_flags)[i]) == 0)
  85         return i;
  86     }
  87   return -1;
  88 };
  89
  90 static inline int
  91 __attribute__ ((unused, always_inline))
  92 _dl_string_platform (const char *str)
  93 {
  94   int i;
  95
  96   if (str != NULL)
  97     for (i = 0; i < _DL_PLATFORMS_COUNT; ++i)
  98       {
  99         if (strcmp (str, GLRO(dl_s390_platforms)[i]) == 0)
 100           return _DL_FIRST_PLATFORM + i;
 101       }
 102   return -1;
 103 };
 104
 105 #endif /* dl-procinfo.h */