mono/utils/mono-hwcap-ppc.c

   1 /*
   2  * mono-hwcap-ppc.c: PowerPC hardware feature detection
   3  *
   4  * Authors:
   5  *    Alex Rønne Petersen (alexrp@xamarin.com)
   6  *    Elijah Taylor (elijahtaylor@google.com)
   7  *    Miguel de Icaza (miguel@xamarin.com)
   8  *    Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com)
   9  *    Paolo Molaro (lupus@xamarin.com)
  10  *    Rodrigo Kumpera (kumpera@gmail.com)
  11  *    Sebastien Pouliot (sebastien@xamarin.com)
  12  *    Zoltan Varga (vargaz@xamarin.com)
  13  *
  14  * Copyright 2003 Ximian, Inc.
  15  * Copyright 2003-2011 Novell, Inc
  16  * Copyright 2006 Broadcom
  17  * Copyright 2007-2008 Andreas Faerber
  18  * Copyright 2011-2013 Xamarin Inc
  19  */
  20
  21 #include "mono/utils/mono-hwcap-ppc.h"
  22
  23 #if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
  24 #include <string.h>
  25 #include <sys/auxv.h>
  26 #endif
  27
  28 gboolean mono_hwcap_ppc_has_icache_snoop = FALSE;
  29 gboolean mono_hwcap_ppc_is_isa_2x = FALSE;
  30 gboolean mono_hwcap_ppc_is_isa_64 = FALSE;
  31 gboolean mono_hwcap_ppc_has_move_fpr_gpr = FALSE;
  32 gboolean mono_hwcap_ppc_has_multiple_ls_units = FALSE;
  33
  34 void
  35 mono_hwcap_arch_init (void)
  36 {
  37 #if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
  38         unsigned long hwcap;
  39         unsigned long platform;
  40
  41         if ((hwcap = getauxval(AT_HWCAP))) {
  42                 /* PPC_FEATURE_ICACHE_SNOOP */
  43                 if (hwcap & 0x00002000)
  44                         mono_hwcap_ppc_has_icache_snoop = TRUE;
  45
  46                 /* PPC_FEATURE_POWER4, PPC_FEATURE_POWER5, PPC_FEATURE_POWER5_PLUS,
  47                    PPC_FEATURE_CELL_BE, PPC_FEATURE_PA6T, PPC_FEATURE_ARCH_2_05 */
  48                 if (hwcap & (0x00080000 | 0x00040000 | 0x00020000 | 0x00010000 | 0x00000800 | 0x00001000))
  49                         mono_hwcap_ppc_is_isa_2x = TRUE;
  50
  51                 /* PPC_FEATURE_64 */
  52                 if (hwcap & 0x40000000)
  53                         mono_hwcap_ppc_is_isa_64 = TRUE;
  54
  55                 /* PPC_FEATURE_POWER6_EXT */
  56                 if (hwcap & 0x00000200)
  57                         mono_hwcap_ppc_has_move_fpr_gpr = TRUE;
  58         }
  59
  60         if ((platform = getauxval(AT_PLATFORM))) {
  61                 const char *str = (const char *) platform;
  62
  63                 if (!strcmp (str, "ppc970") || (!strncmp (str, "power", 5) && str [5] >= '4' && str [5] <= '7'))
  64                         mono_hwcap_ppc_has_multiple_ls_units = TRUE;
  65         }
  66 #endif
  67 }
  68
  69 void
  70 mono_hwcap_print (FILE* f)
  71 {
  72         g_fprintf (f, "mono_hwcap_ppc_has_icache_snoop = %i\n", mono_hwcap_ppc_has_icache_snoop);
  73         g_fprintf (f, "mono_hwcap_ppc_is_isa_2x = %i\n", mono_hwcap_ppc_is_isa_2x);
  74         g_fprintf (f, "mono_hwcap_ppc_is_isa_64 = %i\n", mono_hwcap_ppc_is_isa_64);
  75         g_fprintf (f, "mono_hwcap_ppc_has_move_fpr_gpr = %i\n", mono_hwcap_ppc_has_move_fpr_gpr);
  76         g_fprintf (f, "mono_hwcap_ppc_has_multiple_ls_units = %i\n", mono_hwcap_ppc_has_multiple_ls_units);
  77 }