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1 jermar 1 
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1731 jermar 29 
/** @addtogroup ia32
1702 cejka 30 
 * @{
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 */
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/** @file
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 */
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1 jermar 35 
#include <arch/cpu.h>
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#include <arch/cpuid.h>
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#include <arch/pm.h>
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#include <arch.h>
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#include <arch/types.h>
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#include <print.h>
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#include <typedefs.h>
391 jermar 43 
#include <fpu_context.h>
1 jermar 44 
 
16 jermar 45 
#include <arch/smp/apic.h>
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1 jermar 47 
/*
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 * Identification of CPUs.
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 * Contains only non-MP-Specification specific SMP code.
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 */
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#define AMD_CPUID_EBX   0x68747541
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#define AMD_CPUID_ECX   0x444d4163
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#define AMD_CPUID_EDX   0x69746e65
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#define INTEL_CPUID_EBX 0x756e6547
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#define INTEL_CPUID_ECX 0x6c65746e
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#define INTEL_CPUID_EDX 0x49656e69
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141 vana 59 
 
1 jermar 60 
enum vendor {
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    VendorUnknown=0,
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    VendorAMD,
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    VendorIntel
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};
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static char *vendor_str[] = {
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    "Unknown Vendor",
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    "AuthenticAMD",
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    "GenuineIntel"
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};
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309 palkovsky 72 
void fpu_disable(void)
58 vana 73 
{
309 palkovsky 74 
    __asm__ volatile (
58 vana 75 
        "mov %%cr0,%%eax;"
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        "or $8,%%eax;"
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        "mov %%eax,%%cr0;"
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        :
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        :
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        :"%eax"
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    );
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}
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309 palkovsky 84 
void fpu_enable(void)
58 vana 85 
{
309 palkovsky 86 
    __asm__ volatile (
58 vana 87 
        "mov %%cr0,%%eax;"
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        "and $0xffFFffF7,%%eax;"
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        "mov %%eax,%%cr0;"
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        :
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        :
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        :"%eax"
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    ); 
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}
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1 jermar 96 
void cpu_arch_init(void)
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{
1187 jermar 98 
    cpuid_feature_info fi;
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    cpuid_extended_feature_info efi;
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    cpu_info_t info;
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    __u32 help = 0;
1019 vana 102 
 
15 jermar 103 
    CPU->arch.tss = tss_p;
1187 jermar 104 
    CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((__u8 *) CPU->arch.tss);
1019 vana 105 
 
1187 jermar 106 
    CPU->fpu_owner = NULL;
1019 vana 107 
 
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    cpuid(1, &info);
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1187 jermar 110 
    fi.word = info.cpuid_edx;
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    efi.word = info.cpuid_ecx;
1019 vana 112 
 
1187 jermar 113 
    if (fi.bits.fxsr)
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        fpu_fxsr();
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    else
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        fpu_fsr(); 
1019 vana 117 
 
1187 jermar 118 
    if (fi.bits.sse) {
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        asm volatile (
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            "mov %%cr4,%0\n"
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            "or %1,%0\n"
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            "mov %0,%%cr4\n"
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            : "+r" (help)
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            : "i" (CR4_OSFXSR_MASK|(1<<10))
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        );
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    }
1 jermar 127 
}
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void cpu_identify(void)
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{
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    cpu_info_t info;
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15 jermar 133 
    CPU->arch.vendor = VendorUnknown;
1 jermar 134 
    if (has_cpuid()) {
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        cpuid(0, &info);
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        /*
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         * Check for AMD processor.
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         */
125 jermar 140 
        if (info.cpuid_ebx==AMD_CPUID_EBX && info.cpuid_ecx==AMD_CPUID_ECX && info.cpuid_edx==AMD_CPUID_EDX) {
15 jermar 141 
            CPU->arch.vendor = VendorAMD;
1 jermar 142 
        }
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        /*
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         * Check for Intel processor.
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         */    
125 jermar 147 
        if (info.cpuid_ebx==INTEL_CPUID_EBX && info.cpuid_ecx==INTEL_CPUID_ECX && info.cpuid_edx==INTEL_CPUID_EDX) {
15 jermar 148 
            CPU->arch.vendor = VendorIntel;
1 jermar 149 
        }
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        cpuid(1, &info);
15 jermar 152 
        CPU->arch.family = (info.cpuid_eax>>8)&0xf;
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        CPU->arch.model = (info.cpuid_eax>>4)&0xf;
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        CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;                      
1 jermar 155 
    }
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}
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22 jermar 158 
void cpu_print_report(cpu_t* m)
1 jermar 159 
{
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    printf("cpu%d: (%s family=%d model=%d stepping=%d) %dMHz\n",
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        m->id, vendor_str[m->arch.vendor], m->arch.family, m->arch.model, m->arch.stepping,
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        m->frequency_mhz);
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}
1702 cejka 164 
 
1731 jermar 165 
/** @}
1702 cejka 166 
 */