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