arch/x86/kernel/cpu/transmeta.c

   1 #include <linux/kernel.h>
   2 #include <linux/mm.h>
   3 #include <asm/processor.h>
   4 #include <asm/msr.h>
   5 #include "cpu.h"
   6
   7 static void early_init_transmeta(struct cpuinfo_x86 *c)
   8 {
   9         u32 xlvl;
  10
  11         /* Transmeta-defined flags: level 0x80860001 */
  12         xlvl = cpuid_eax(0x80860000);
  13         if ((xlvl & 0xffff0000) == 0x80860000) {
  14                 if (xlvl >= 0x80860001)
  15                         c->x86_capability[CPUID_8086_0001_EDX] = cpuid_edx(0x80860001);
  16         }
  17 }
  18
  19 static void init_transmeta(struct cpuinfo_x86 *c)
  20 {
  21         unsigned int cap_mask, uk, max, dummy;
  22         unsigned int cms_rev1, cms_rev2;
  23         unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev;
  24         char cpu_info[65];
  25
  26         early_init_transmeta(c);
  27
  28         cpu_detect_cache_sizes(c);
  29
  30         /* Print CMS and CPU revision */
  31         max = cpuid_eax(0x80860000);
  32         cpu_rev = 0;
  33         if (max >= 0x80860001) {
  34                 cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags);
  35                 if (cpu_rev != 0x02000000) {
  36                         pr_info("CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
  37                                 (cpu_rev >> 24) & 0xff,
  38                                 (cpu_rev >> 16) & 0xff,
  39                                 (cpu_rev >> 8) & 0xff,
  40                                 cpu_rev & 0xff,
  41                                 cpu_freq);
  42                 }
  43         }
  44         if (max >= 0x80860002) {
  45                 cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
  46                 if (cpu_rev == 0x02000000) {
  47                         pr_info("CPU: Processor revision %08X, %u MHz\n",
  48                                 new_cpu_rev, cpu_freq);
  49                 }
  50                 pr_info("CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
  51                        (cms_rev1 >> 24) & 0xff,
  52                        (cms_rev1 >> 16) & 0xff,
  53                        (cms_rev1 >> 8) & 0xff,
  54                        cms_rev1 & 0xff,
  55                        cms_rev2);
  56         }
  57         if (max >= 0x80860006) {
  58                 cpuid(0x80860003,
  59                       (void *)&cpu_info[0],
  60                       (void *)&cpu_info[4],
  61                       (void *)&cpu_info[8],
  62                       (void *)&cpu_info[12]);
  63                 cpuid(0x80860004,
  64                       (void *)&cpu_info[16],
  65                       (void *)&cpu_info[20],
  66                       (void *)&cpu_info[24],
  67                       (void *)&cpu_info[28]);
  68                 cpuid(0x80860005,
  69                       (void *)&cpu_info[32],
  70                       (void *)&cpu_info[36],
  71                       (void *)&cpu_info[40],
  72                       (void *)&cpu_info[44]);
  73                 cpuid(0x80860006,
  74                       (void *)&cpu_info[48],
  75                       (void *)&cpu_info[52],
  76                       (void *)&cpu_info[56],
  77                       (void *)&cpu_info[60]);
  78                 cpu_info[64] = '\0';
  79                 pr_info("CPU: %s\n", cpu_info);
  80         }
  81
  82         /* Unhide possibly hidden capability flags */
  83         rdmsr(0x80860004, cap_mask, uk);
  84         wrmsr(0x80860004, ~0, uk);
  85         c->x86_capability[CPUID_1_EDX] = cpuid_edx(0x00000001);
  86         wrmsr(0x80860004, cap_mask, uk);
  87
  88         /* All Transmeta CPUs have a constant TSC */
  89         set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
  90
  91 #ifdef CONFIG_SYSCTL
  92         /*
  93          * randomize_va_space slows us down enormously;
  94          * it probably triggers retranslation of x86->native bytecode
  95          */
  96         randomize_va_space = 0;
  97 #endif
  98 }
  99
 100 static const struct cpu_dev transmeta_cpu_dev = {
 101         .c_vendor       = "Transmeta",
 102         .c_ident        = { "GenuineTMx86", "TransmetaCPU" },
 103         .c_early_init   = early_init_transmeta,
 104         .c_init         = init_transmeta,
 105         .c_x86_vendor   = X86_VENDOR_TRANSMETA,
 106 };
 107
 108 cpu_dev_register(transmeta_cpu_dev);