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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | /* CPU detection code */ |
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| 23 | |||
| 24 | #include <ll/i386/hw-data.h> |
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| 25 | #include <ll/i386/hw-arch.h> |
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| 26 | #include <ll/i386/mem.h> |
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| 705 | giacomo | 27 | #include <ll/i386/advtimer.h> |
| 28 | #include <ll/i386/apic.h> |
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| 2 | pj | 29 | |
| 40 | pj | 30 | FILE(Cpu-C); |
| 2 | pj | 31 | |
| 40 | pj | 32 | INLINE_OP void cpuid(DWORD a, DWORD *outa, DWORD *outb, DWORD *outc, DWORD *outd) |
| 2 | pj | 33 | { |
| 34 | #ifdef __OLD_GNU__ |
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| 40 | pj | 35 | __asm__ __volatile__ (".byte 0x0F,0xA2" |
| 2 | pj | 36 | #else |
| 40 | pj | 37 | __asm__ __volatile__ ("cpuid" |
| 2 | pj | 38 | #endif |
| 40 | pj | 39 | : "=a" (*outa), |
| 40 | "=b" (*outb), |
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| 41 | "=c" (*outc), |
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| 42 | "=d" (*outd) |
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| 43 | : "a" (a)); |
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| 2 | pj | 44 | } |
| 45 | |||
| 46 | void X86_get_CPU(struct ll_cpuInfo *p) |
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| 47 | { |
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| 40 | pj | 48 | DWORD tmp; |
| 2 | pj | 49 | |
| 40 | pj | 50 | memset(p, 0, sizeof(struct ll_cpuInfo)); |
| 51 | if (X86_is386()) { |
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| 52 | p->X86_cpu = 3; |
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| 53 | return; |
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| 2 | pj | 54 | } |
| 788 | giacomo | 55 | |
| 56 | if (X86_isCyrix()) { |
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| 57 | X86_enable_cyrix_cpuid(); |
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| 58 | } |
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| 59 | |||
| 40 | pj | 60 | if (X86_hasCPUID()) { |
| 61 | p->X86_cpuIdFlag = 1; |
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| 62 | p->X86_cpu = 5; |
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| 63 | cpuid(0, &tmp, &(p->X86_vendor_1), |
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| 64 | &(p->X86_vendor_3), |
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| 65 | &(p->X86_vendor_2)); |
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| 66 | if (tmp >= 1) { |
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| 705 | giacomo | 67 | |
| 40 | pj | 68 | cpuid(1, &(p->X86_signature), |
| 69 | &(p->X86_IntelFeature_1), |
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| 70 | &(p->X86_IntelFeature_2), |
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| 71 | &(p->X86_StandardFeature)); |
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| 756 | giacomo | 72 | #ifdef __APIC__ |
| 705 | giacomo | 73 | if ((p->X86_StandardFeature >> 5) & 1) { |
| 74 | |||
| 75 | unsigned long msr_original_low, msr_original_high; |
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| 76 | |||
| 77 | rdmsr(APIC_BASE_MSR, msr_original_low, msr_original_high); |
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| 78 | wrmsr(APIC_BASE_MSR, msr_original_low|(1<<11), 0); |
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| 79 | |||
| 80 | cpuid(1, &(p->X86_signature), |
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| 81 | &(p->X86_IntelFeature_1), |
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| 82 | &(p->X86_IntelFeature_2), |
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| 83 | &(p->X86_StandardFeature)); |
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| 84 | |||
| 85 | wrmsr(APIC_BASE_MSR, msr_original_low, msr_original_high); |
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| 86 | |||
| 87 | } |
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| 756 | giacomo | 88 | #endif |
| 40 | pj | 89 | } |
| 90 | } else { |
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| 91 | p->X86_cpu = 4; |
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| 92 | if (X86_isCyrix()) { |
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| 93 | p->X86_cpu = 11; |
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| 94 | } |
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| 95 | /* Need tests for AMD and others... */ |
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| 2 | pj | 96 | } |
| 97 | } |