crypto/sparcv9cap.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <sys/time.h>
   5 #include <openssl/bn.h>
   6
   7 #define SPARCV9_TICK_PRIVILEGED (1<<0)
   8 #define SPARCV9_PREFER_FPU      (1<<1)
   9 #define SPARCV9_VIS1            (1<<2)
  10 #define SPARCV9_VIS2            (1<<3)  /* reserved */
  11 #define SPARCV9_FMADD           (1<<4)  /* reserved for SPARC64 V */
  12 static int OPENSSL_sparcv9cap_P=SPARCV9_TICK_PRIVILEGED;
  13
  14 int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num)
  15         {
  16         int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num);
  17         int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num);
  18
  19         if ((OPENSSL_sparcv9cap_P&(SPARCV9_PREFER_FPU|SPARCV9_VIS1)) ==
  20                 (SPARCV9_PREFER_FPU|SPARCV9_VIS1))
  21                 return bn_mul_mont_fpu(rp,ap,bp,np,n0,num);
  22         else
  23                 return bn_mul_mont_int(rp,ap,bp,np,n0,num);
  24         }
  25
  26 unsigned long OPENSSL_rdtsc(void)
  27         {
  28         unsigned long _sparcv9_rdtick(void);
  29
  30         if (OPENSSL_sparcv9cap_P&SPARCV9_TICK_PRIVILEGED)
  31 #if defined(__sun) && defined(__SVR4)
  32                 return gethrtime();
  33 #else
  34                 return 0;
  35 #endif
  36         else
  37                 return _sparcv9_rdtick();
  38         }
  39
  40 #if defined(__sun) && defined(__SVR4)
  41
  42 #include <dlfcn.h>
  43 #include <libdevinfo.h>
  44
  45 typedef di_node_t (*di_init_t)(const char *,uint_t);
  46 typedef void      (*di_fini_t)(di_node_t);
  47 typedef char *    (*di_node_name_t)(di_node_t);
  48 typedef int       (*di_walk_node_t)(di_node_t,uint_t,di_node_name_t,int (*)(di_node_t,di_node_name_t));
  49
  50 #define DLLINK(h,name) (name=(name##_t)dlsym((h),#name))
  51
  52 static int walk_nodename(di_node_t node, di_node_name_t di_node_name)
  53         {
  54         char *name = (*di_node_name)(node);
  55
  56         /* This is expected to catch all UltraSPARC flavors prior T1 */
  57         if (!strcmp (name,"SUNW,UltraSPARC") ||
  58             !strncmp(name,"SUNW,UltraSPARC-I",17))  /* covers II,III,IV */
  59                 {
  60                 OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
  61
  62                 /* %tick is privileged only on UltraSPARC-I/II, but not IIe */
  63                 if (name[14]!='\0' && name[17]!='\0' && name[18]!='\0')
  64                         OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
  65
  66                 return DI_WALK_TERMINATE;
  67                 }
  68         /* This is expected to catch remaining UltraSPARCs, such as T1 */
  69         else if (!strncmp(name,"SUNW,UltraSPARC",15))
  70                 {
  71                 OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
  72
  73                 return DI_WALK_TERMINATE;
  74                 }
  75
  76         return DI_WALK_CONTINUE;
  77         }
  78
  79 void OPENSSL_cpuid_setup(void)
  80         {
  81         void *h;
  82         char *e;
  83         static int trigger=0;
  84
  85         if (trigger) return;
  86         trigger=1;
  87
  88         if ((e=getenv("OPENSSL_sparcv9cap")))
  89                 {
  90                 OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
  91                 return;
  92                 }
  93
  94         if ((h = dlopen("libdevinfo.so.1",RTLD_LAZY))) do
  95                 {
  96                 di_init_t       di_init;
  97                 di_fini_t       di_fini;
  98                 di_walk_node_t  di_walk_node;
  99                 di_node_name_t  di_node_name;
 100                 di_node_t       root_node;
 101
 102                 if (!DLLINK(h,di_init))         break;
 103                 if (!DLLINK(h,di_fini))         break;
 104                 if (!DLLINK(h,di_walk_node))    break;
 105                 if (!DLLINK(h,di_node_name))    break;
 106
 107                 if ((root_node = (*di_init)("/",DINFOSUBTREE))!=DI_NODE_NIL)
 108                         {
 109                         (*di_walk_node)(root_node,DI_WALK_SIBFIRST,
 110                                         di_node_name,walk_nodename);
 111                         (*di_fini)(root_node);
 112                         }
 113                 } while(0);
 114
 115         if (h) dlclose(h);
 116         }
 117
 118 #else
 119
 120 void OPENSSL_cpuid_setup(void)
 121         {
 122         char *e;
 123
 124         if ((e=getenv("OPENSSL_sparcv9cap")))
 125                 {
 126                 OPENSSL_sparcv9cap_P=strtoul(env,NULL,0);
 127                 return;
 128                 }
 129
 130         /* For now we assume that the rest supports UltraSPARC-I* only */
 131         OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
 132         }
 133
 134 #endif