Bug 57548

 CPU info reports VIA C3 unknown on boot. Also, the VIA specific features
 aren't listed

Fix: 

Here's a patch that prints the information. It doesn't store it
 anywhere though, so you can't do any checks later to activate the
 VIA specific features. Anyone used to adding new variables to the
 kernel could perhaps give me some pointers on how to do that. I'm
 specifically working on getting the VIA RNG into /dev/random.
 
 *** /usr/src/sys/i386/i386/identcpu.c   Wed Apr 30 14:23:58 2003
 --- identcpu.c  Fri Oct  3 18:19:08 2003
 ***************
 *** 78,83 ****
 --- 78,84 ----
    static void identifycyrix(void);
    #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
    static void print_AMD_features(void);
 + static void print_C3_features(void);
    #endif
    static void print_AMD_info(void);
    static void print_AMD_assoc(int i);
 ***************
 *** 535,540 ****
 --- 536,544 ----
                  case 0x670:
                          strcpy(cpu_model, "VIA C3 Samuel 2");
                          break;
 +               case 0x690:
 +                       strcpy(cpu_model, "VIA C3 Nehemiah");
 +                       break;
                  default:
                          strcpy(cpu_model, "VIA/IDT Unknown");
                  }
 ***************
 *** 664,669 ****
 --- 668,676 ----
                  if (strcmp(cpu_vendor, "AuthenticAMD") == 0 &&
                      cpu_exthigh >= 0x80000001)
                          print_AMD_features();
 +                 if (strcmp(cpu_vendor, "CentaurHauls") == 0 &&
 +                   (cpu_id & 0xff0) == 0x690)
 +                       print_C3_features();
          } else if (strcmp(cpu_vendor, "CyrixInstead") == 0) {
                  printf("  DIR=0x%04x", cyrix_did);
                  printf("  Stepping=%u", (cyrix_did & 0xf000) >> 12);
 ***************
 *** 1082,1087 ****
 --- 1089,1113 ----
                  "\0403DNow!"
                  );
    }
 +
 + static void
 + print_C3_features(void)
 + {
 +       u_int regs[4];
 +
 +       do_cpuid(0xC0000000, regs);
 +       if (regs[0] >= 0xC0000001) {
 +               do_cpuid(0xC0000001, regs);
 +               printf("\n  Via C3 Features=0x%b", regs[3],
 +                       "\020"
 +                         "\001AIS"     /* Alternate instruction set */
 +                       "\003XSTORE"    /* Random number generator */
 +                       "\004LH"        /* Long haul */
 +                       "\005FEMMS"     /* Via 3dnow! extensions */
 +                       );
 +       }
 + }
 +
    #endif
 
    /*
How-To-Repeat:  Boot a Nehemiah system