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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <arch/cpu.h>
  30. #include <arch/cpuid.h>
  31. #include <arch/pm.h>
  32.  
  33. #include <arch.h>
  34. #include <arch/types.h>
  35. #include <print.h>
  36. #include <typedefs.h>
  37.  
  38. /*
  39.  * Identification of CPUs.
  40.  * Contains only non-MP-Specification specific SMP code.
  41.  */
  42. #define AMD_CPUID_EBX   0x68747541
  43. #define AMD_CPUID_ECX   0x444d4163
  44. #define AMD_CPUID_EDX   0x69746e65
  45.  
  46. #define INTEL_CPUID_EBX 0x756e6547
  47. #define INTEL_CPUID_ECX 0x6c65746e
  48. #define INTEL_CPUID_EDX 0x49656e69
  49.  
  50. enum vendor {
  51.     VendorUnknown=0,
  52.     VendorAMD,
  53.     VendorIntel
  54. };
  55.  
  56. static char *vendor_str[] = {
  57.     "Unknown Vendor",
  58.     "AuthenticAMD",
  59.     "GenuineIntel"
  60. };
  61.  
  62. void cpu_arch_init(void)
  63. {
  64.     CPU->arch.tss = tss_p;
  65. }
  66.  
  67.  
  68. void cpu_identify(void)
  69. {
  70.     cpu_info_t info;
  71.     int i;
  72.  
  73.     CPU->arch.vendor = VendorUnknown;
  74.     if (has_cpuid()) {
  75.         cpuid(0, &info);
  76.  
  77.         /*
  78.          * Check for AMD processor.
  79.          */
  80.         if (info.cpuid_ebx==AMD_CPUID_EBX &&
  81.             info.cpuid_ecx==AMD_CPUID_ECX &&
  82.             info.cpuid_edx==AMD_CPUID_EDX) {
  83.            
  84.             CPU->arch.vendor = VendorAMD;
  85.         }
  86.  
  87.         /*
  88.          * Check for Intel processor.
  89.          */    
  90.         if (info.cpuid_ebx==INTEL_CPUID_EBX &&
  91.             info.cpuid_ecx==INTEL_CPUID_ECX &&
  92.             info.cpuid_edx==INTEL_CPUID_EDX) {
  93.  
  94.             CPU->arch.vendor = VendorIntel;
  95.  
  96.         }
  97.                
  98.         cpuid(1, &info);
  99.         CPU->arch.family = (info.cpuid_eax>>8)&0xf;
  100.         CPU->arch.model = (info.cpuid_eax>>4)&0xf;
  101.         CPU->arch.stepping = (info.cpuid_eax>>0)&0xf;                      
  102.     }
  103. }
  104.  
  105. void cpu_print_report(struct cpu* m)
  106. {
  107.     printf("cpu%d: (%s family=%d model=%d stepping=%d) %dMHz\n",
  108.         m->id, vendor_str[m->arch.vendor], m->arch.family, m->arch.model, m->arch.stepping,
  109.         m->frequency_mhz);
  110. }
  111.