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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.  
  51. enum vendor {
  52.     VendorUnknown=0,
  53.     VendorAMD,
  54.     VendorIntel
  55. };
  56.  
  57. static char *vendor_str[] = {
  58.     "Unknown Vendor",
  59.     "AuthenticAMD",
  60.     "GenuineIntel"
  61. };
  62.  
  63. void set_TS_flag(void)
  64. {
  65.     asm
  66.     (
  67.         "mov %%cr0,%%rax;"
  68.         "or $8,%%rax;"
  69.         "mov %%rax,%%cr0;"
  70.         :
  71.         :
  72.         :"%rax"
  73.     );
  74. }
  75.  
  76. void reset_TS_flag(void)
  77. {
  78.     asm
  79.     (
  80.         "mov %%cr0,%%rax;"
  81.         "btc $4,%%rax;"
  82.         "mov %%rax,%%cr0;"
  83.         :
  84.         :
  85.         :"%rax"
  86.     ); 
  87. }
  88.