X86BaseCpuLib.c

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#include <Register/Intel/Cpuid.h>
#include <Register/Amd/Cpuid.h>
 
#include <Library/BaseLib.h>
#include <Library/CpuLib.h>
 
BOOLEAN
EFIAPI
StandardSignatureIsAuthenticAMD (
  VOID
  )
{
  UINT32  RegEbx;
  UINT32  RegEcx;
  UINT32  RegEdx;
 
  AsmCpuid (CPUID_SIGNATURE, NULL, &RegEbx, &RegEcx, &RegEdx);
  return (RegEbx == CPUID_SIGNATURE_AUTHENTIC_AMD_EBX &&
          RegEcx == CPUID_SIGNATURE_AUTHENTIC_AMD_ECX &&
          RegEdx == CPUID_SIGNATURE_AUTHENTIC_AMD_EDX);
}
 
UINT32
EFIAPI
GetCpuFamilyModel (
  VOID
  )
{
  CPUID_VERSION_INFO_EAX  Eax;
 
  AsmCpuid (CPUID_VERSION_INFO, &Eax.Uint32, NULL, NULL, NULL);
 
  //
  // Mask other fields than Family and Model.
  //
  Eax.Bits.SteppingId    = 0;
  Eax.Bits.ProcessorType = 0;
  Eax.Bits.Reserved1     = 0;
  Eax.Bits.Reserved2     = 0;
  return Eax.Uint32;
}
 
UINT8
EFIAPI
GetCpuSteppingId (
  VOID
  )
{
  CPUID_VERSION_INFO_EAX  Eax;
 
  AsmCpuid (CPUID_VERSION_INFO, &Eax.Uint32, NULL, NULL, NULL);
 
  return (UINT8)Eax.Bits.SteppingId;
}