LXR linux/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
   8static 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
  20static 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
 101static 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
 109cpu_dev_register(transmeta_cpu_dev);
 110