transmeta.c

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#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <asm/processor.h>
#include <asm/msr.h>
#include "cpu.h"

static void __cpuinit early_init_transmeta(struct cpuinfo_x86 *c)
{
    u32 xlvl;

    /* Transmeta-defined flags: level 0x80860001 */
    xlvl = cpuid_eax(0x80860000);
    if ((xlvl & 0xffff0000) == 0x80860000) {
        if (xlvl >= 0x80860001)
            c->x86_capability[2] = cpuid_edx(0x80860001);
    }
}

static void __cpuinit init_transmeta(struct cpuinfo_x86 *c)
{
    unsigned int cap_mask, uk, max, dummy;
    unsigned int cms_rev1, cms_rev2;
    unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev;
    char cpu_info[65];

    early_init_transmeta(c);

    cpu_detect_cache_sizes(c);

    /* Print CMS and CPU revision */
    max = cpuid_eax(0x80860000);
    cpu_rev = 0;
    if (max >= 0x80860001) {
        cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags);
        if (cpu_rev != 0x02000000) {
            printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
                (cpu_rev >> 24) & 0xff,
                (cpu_rev >> 16) & 0xff,
                (cpu_rev >> 8) & 0xff,
                cpu_rev & 0xff,
                cpu_freq);
        }
    }
    if (max >= 0x80860002) {
        cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
        if (cpu_rev == 0x02000000) {
            printk(KERN_INFO "CPU: Processor revision %08X, %u MHz\n",
                new_cpu_rev, cpu_freq);
        }
        printk(KERN_INFO "CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
               (cms_rev1 >> 24) & 0xff,
               (cms_rev1 >> 16) & 0xff,
               (cms_rev1 >> 8) & 0xff,
               cms_rev1 & 0xff,
               cms_rev2);
    }
    if (max >= 0x80860006) {
        cpuid(0x80860003,
              (void *)&cpu_info[0],
              (void *)&cpu_info[4],
              (void *)&cpu_info[8],
              (void *)&cpu_info[12]);
        cpuid(0x80860004,
              (void *)&cpu_info[16],
              (void *)&cpu_info[20],
              (void *)&cpu_info[24],
              (void *)&cpu_info[28]);
        cpuid(0x80860005,
              (void *)&cpu_info[32],
              (void *)&cpu_info[36],
              (void *)&cpu_info[40],
              (void *)&cpu_info[44]);
        cpuid(0x80860006,
              (void *)&cpu_info[48],
              (void *)&cpu_info[52],
              (void *)&cpu_info[56],
              (void *)&cpu_info[60]);
        cpu_info[64] = '\0';
        printk(KERN_INFO "CPU: %s\n", cpu_info);
    }

    /* Unhide possibly hidden capability flags */
    rdmsr(0x80860004, cap_mask, uk);
    wrmsr(0x80860004, ~0, uk);
    c->x86_capability[0] = cpuid_edx(0x00000001);
    wrmsr(0x80860004, cap_mask, uk);

    /* All Transmeta CPUs have a constant TSC */
    set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);

#ifdef CONFIG_SYSCTL
    /*
     * randomize_va_space slows us down enormously;
     * it probably triggers retranslation of x86->native bytecode
     */
    randomize_va_space = 0;
#endif
}

static const struct cpu_dev __cpuinitconst transmeta_cpu_dev = {
    .c_vendor   = "Transmeta",
    .c_ident    = { "GenuineTMx86", "TransmetaCPU" },
    .c_early_init   = early_init_transmeta,
    .c_init     = init_transmeta,
    .c_x86_vendor   = X86_VENDOR_TRANSMETA,
};

cpu_dev_register(transmeta_cpu_dev);