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