arch/i386/kernel/cpu/transmeta.c

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