arch/x86/kernel/cpu/centaur_64.c

   1 #include <linux/init.h>
   2 #include <linux/smp.h>
   3
   4 #include <asm/cpufeature.h>
   5 #include <asm/processor.h>
   6
   7 void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
   8 {
   9         if (c->x86 == 0x6 && c->x86_model >= 0xf)
  10                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
  11 }
  12
  13 void __cpuinit init_centaur(struct cpuinfo_x86 *c)
  14 {
  15         /* Cache sizes */
  16         unsigned n;
  17
  18         n = c->extended_cpuid_level;
  19         if (n >= 0x80000008) {
  20                 unsigned eax = cpuid_eax(0x80000008);
  21                 c->x86_virt_bits = (eax >> 8) & 0xff;
  22                 c->x86_phys_bits = eax & 0xff;
  23         }
  24
  25         if (c->x86 == 0x6 && c->x86_model >= 0xf) {
  26                 c->x86_cache_alignment = c->x86_clflush_size * 2;
  27                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
  28                 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
  29         }
  30         set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
  31 }