arch/x86/kernel/cpu/transmeta.c

   1 #include <linux/kernel.h>
   2 #include <linux/mm.h>
   3 #include <linux/init.h>
   4 #include <asm/processor.h>
   5 #include <asm/msr.h>
   6 #include "cpu.h"
   7
   8 static void __cpuinit init_transmeta(struct cpuinfo_x86 *c)
   9 {
  10         unsigned int cap_mask, uk, max, dummy;
  11         unsigned int cms_rev1, cms_rev2;
  12         unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev;
  13         char cpu_info[65];
  14
  15         get_model_name(c);      /* Same as AMD/Cyrix */
  16         display_cacheinfo(c);
  17
  18         /* Print CMS and CPU revision */
  19         max = cpuid_eax(0x80860000);
  20         cpu_rev = 0;
  21         if ( max >= 0x80860001 ) {
  22                 cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags);
  23                 if (cpu_rev != 0x02000000) {
  24                         printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
  25                                 (cpu_rev >> 24) & 0xff,
  26                                 (cpu_rev >> 16) & 0xff,
  27                                 (cpu_rev >> 8) & 0xff,
  28                                 cpu_rev & 0xff,
  29                                 cpu_freq);
  30                 }
  31         }
  32         if ( max >= 0x80860002 ) {
  33                 cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
  34                 if (cpu_rev == 0x02000000) {
  35                         printk(KERN_INFO "CPU: Processor revision %08X, %u MHz\n",
  36                                 new_cpu_rev, cpu_freq);
  37                 }
  38                 printk(KERN_INFO "CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
  39                        (cms_rev1 >> 24) & 0xff,
  40                        (cms_rev1 >> 16) & 0xff,
  41                        (cms_rev1 >> 8) & 0xff,
  42                        cms_rev1 & 0xff,
  43                        cms_rev2);
  44         }
  45         if ( max >= 0x80860006 ) {
  46                 cpuid(0x80860003,
  47                       (void *)&cpu_info[0],
  48                       (void *)&cpu_info[4],
  49                       (void *)&cpu_info[8],
  50                       (void *)&cpu_info[12]);
  51                 cpuid(0x80860004,
  52                       (void *)&cpu_info[16],
  53                       (void *)&cpu_info[20],
  54                       (void *)&cpu_info[24],
  55                       (void *)&cpu_info[28]);
  56                 cpuid(0x80860005,
  57                       (void *)&cpu_info[32],
  58                       (void *)&cpu_info[36],
  59                       (void *)&cpu_info[40],
  60                       (void *)&cpu_info[44]);
  61                 cpuid(0x80860006,
  62                       (void *)&cpu_info[48],
  63                       (void *)&cpu_info[52],
  64                       (void *)&cpu_info[56],
  65                       (void *)&cpu_info[60]);
  66                 cpu_info[64] = '\0';
  67                 printk(KERN_INFO "CPU: %s\n", cpu_info);
  68         }
  69
  70         /* Unhide possibly hidden capability flags */
  71         rdmsr(0x80860004, cap_mask, uk);
  72         wrmsr(0x80860004, ~0, uk);
  73         c->x86_capability[0] = cpuid_edx(0x00000001);
  74         wrmsr(0x80860004, cap_mask, uk);
  75
  76         /* All Transmeta CPUs have a constant TSC */
  77         set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);
  78
  79         /* If we can run i686 user-space code, call us an i686 */
  80 #define USER686 ((1 << X86_FEATURE_TSC)|\
  81                  (1 << X86_FEATURE_CX8)|\
  82                  (1 << X86_FEATURE_CMOV))
  83         if (c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686)
  84                 c->x86 = 6;
  85
  86 #ifdef CONFIG_SYSCTL
  87         /* randomize_va_space slows us down enormously;
  88            it probably triggers retranslation of x86->native bytecode */
  89         randomize_va_space = 0;
  90 #endif
  91 }
  92
  93 static void __cpuinit transmeta_identify(struct cpuinfo_x86 * c)
  94 {
  95         u32 xlvl;
  96
  97         /* Transmeta-defined flags: level 0x80860001 */
  98         xlvl = cpuid_eax(0x80860000);
  99         if ( (xlvl & 0xffff0000) == 0x80860000 ) {
 100                 if (  xlvl >= 0x80860001 )
 101                         c->x86_capability[2] = cpuid_edx(0x80860001);
 102         }
 103 }
 104
 105 static struct cpu_dev transmeta_cpu_dev __cpuinitdata = {
 106         .c_vendor       = "Transmeta",
 107         .c_ident        = { "GenuineTMx86", "TransmetaCPU" },
 108         .c_init         = init_transmeta,
 109         .c_identify     = transmeta_identify,
 110 };
 111
 112 int __init transmeta_init_cpu(void)
 113 {
 114         cpu_devs[X86_VENDOR_TRANSMETA] = &transmeta_cpu_dev;
 115         return 0;
 116 }