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/* Project:     OSLib
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 * Description: The OS Construction Kit
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 * Date:                1.6.2000
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 * Idea by:             Luca Abeni & Gerardo Lamastra
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 *
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 * OSLib is an SO project aimed at developing a common, easy-to-use
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 * low-level infrastructure for developing OS kernels and Embedded
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 * Applications; it partially derives from the HARTIK project but it
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 * currently is independently developed.
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 *
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 * OSLib is distributed under GPL License, and some of its code has
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 * been derived from the Linux kernel source; also some important
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 * ideas come from studying the DJGPP go32 extender.
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 *
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 * We acknowledge the Linux Community, Free Software Foundation,
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 * D.J. Delorie and all the other developers who believe in the
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 * freedom of software and ideas.
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 *
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 * For legalese, check out the included GPL license.
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 */
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/*      CPU detection code      */
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#include <ll/i386/hw-data.h>
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#include <ll/i386/hw-arch.h>
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#include <ll/i386/mem.h>
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#include <ll/i386/advtimer.h>
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#include <ll/i386/apic.h>
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FILE(Cpu-C);
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INLINE_OP void cpuid(DWORD a, DWORD *outa, DWORD *outb, DWORD *outc, DWORD *outd)
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{
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#ifdef __OLD_GNU__
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    __asm__ __volatile__ (".byte 0x0F,0xA2"
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#else
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    __asm__ __volatile__ ("cpuid"
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#endif
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    : "=a" (*outa),
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      "=b" (*outb),
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      "=c" (*outc),
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      "=d" (*outd)
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    : "a"  (a));
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}
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void X86_get_CPU(struct ll_cpuInfo *p)
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{
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        DWORD tmp;
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        memset(p, 0, sizeof(struct ll_cpuInfo));
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        if (X86_is386()) {
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                p->X86_cpu = 3;
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                return;
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        }
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        if (X86_isCyrix()) {
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                X86_enable_cyrix_cpuid();
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        }
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        if (X86_hasCPUID()) {
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                p->X86_cpuIdFlag = 1;
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                p->X86_cpu = 5;
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                cpuid(0, &tmp, &(p->X86_vendor_1),
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                                &(p->X86_vendor_3),
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                                &(p->X86_vendor_2));
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                if (tmp >= 1) {
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                        cpuid(1, &(p->X86_signature),
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                                &(p->X86_IntelFeature_1),
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                                &(p->X86_IntelFeature_2),
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                                &(p->X86_StandardFeature));
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                #ifdef __APIC__
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                        if ((p->X86_StandardFeature >> 5) & 1) {
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                                unsigned long msr_original_low, msr_original_high;
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                                rdmsr(APIC_BASE_MSR, msr_original_low, msr_original_high);
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                                wrmsr(APIC_BASE_MSR, msr_original_low|(1<<11), 0);
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                                cpuid(1, &(p->X86_signature),
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                                        &(p->X86_IntelFeature_1),
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                                        &(p->X86_IntelFeature_2),
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                                        &(p->X86_StandardFeature));
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                                wrmsr(APIC_BASE_MSR, msr_original_low, msr_original_high);
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                        }      
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                #endif
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                }
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        } else {
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                p->X86_cpu = 4;
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                if (X86_isCyrix()) {
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                        p->X86_cpu = 11;
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                }
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                /* Need tests for AMD and others... */
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        }
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}