Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#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 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];

        get_model_name(c);      /* Same as AMD/Cyrix */

        display_cacheinfo(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_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);

        /* If we can run i686 user-space code, call us an i686 */

#define USER686 ((1 << X86_FEATURE_TSC)|\

                 (1 << X86_FEATURE_CX8)|\

                 (1 << X86_FEATURE_CMOV))

        if (c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686)

                c->x86 = 6;

#ifdef CONFIG_SYSCTL

        /* randomize_va_space slows us down enormously;

           it probably triggers retranslation of x86->native bytecode */

        randomize_va_space = 0;

#endif

}

static void __cpuinit transmeta_identify(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 struct cpu_dev transmeta_cpu_dev __cpuinitdata = {

        .c_vendor       = "Transmeta",

        .c_ident        = { "GenuineTMx86", "TransmetaCPU" },

        .c_init         = init_transmeta,

        .c_identify     = transmeta_identify,

};

int __init transmeta_init_cpu(void)

{

        cpu_devs[X86_VENDOR_TRANSMETA] = &transmeta_cpu_dev;

        return 0;

}