internal static bool ReadTxOut(uint index, uint subLeaf, ref CpuidRegisters registers, ulong threadAffinityMask)
{
return(Kernel.Cpuid.ReadTx(
index,
subLeaf,
ref registers.Eax,
ref registers.Ebx,
ref registers.Ecx,
ref registers.Edx,
(UIntPtr)threadAffinityMask));
}
public static CpuVendor VendorFromCpuidString(CpuidRegisters registers)
{
switch (registers.GetVendorString())
{
case "GenuineIntel":
return(CpuVendor.Intel);
case "AuthenticAMD":
return(CpuVendor.Amd);
default:
return(CpuVendor.Unknown);
}
}
public CpuidThreadInfo(uint threadIndex)
{
ThreadIndex = threadIndex;
var affinityMask = 1UL << (int)ThreadIndex;
uint maxCpuidExtLen;
var registers = new CpuidRegisters();
if (!Cpuid.ReadTxOut(Cpuid.Cpuid0, 0, ref registers, affinityMask))
{
throw new Exception($"Unable to get CPUID0 registers from thread {ThreadIndex}");
}
if (registers.Eax <= Cpuid.Cpuid0)
{
throw new Exception($"CPUID0_Eax: {registers.Eax} <= {Cpuid.Cpuid0}");
}
Vendor = Cpuid.VendorFromCpuidString(registers);
var maxCpuidLen = registers.Eax;
registers.Clear();
if (!Cpuid.ReadTxOut(Cpuid.CpuidExt, 0, ref registers, affinityMask))
{
throw new Exception("ReadTxOut_CpuidExt: fail");
}
if (registers.Eax > Cpuid.CpuidExt)
{
maxCpuidExtLen = registers.Eax - Cpuid.CpuidExt;
}
else
{
throw new Exception($"CPUIDExt_Eax: {registers.Eax} <= {Cpuid.CpuidExt}");
}
maxCpuidLen = Math.Min(maxCpuidLen, 1024);
maxCpuidExtLen = Math.Min(maxCpuidExtLen, 1024);
// Read short core thread info
DataRegisters = new CpuidRegisters[maxCpuidLen + 1];
for (uint i = 0; i < maxCpuidLen + 1; i++)
{
DataRegisters[i] = new CpuidRegisters();
Cpuid.ReadTxOut(Cpuid.Cpuid0 + i, 0, ref DataRegisters[i], affinityMask);
}
// Read full core thread info
DataRegistersExt = new CpuidRegisters[maxCpuidExtLen + 1];
for (uint i = 0; i < maxCpuidExtLen + 1; i++)
{
DataRegistersExt[i] = new CpuidRegisters();
Cpuid.ReadTxOut(Cpuid.CpuidExt + i, 0, ref DataRegistersExt[i], affinityMask);
}
var coreNameBuilder = new StringBuilder();
for (uint i = 2; i <= 4; i++)
{
Cpuid.ReadTxOut(Cpuid.CpuidExt + i, 0, ref registers, affinityMask);
registers.GetVendorExtendedString(ref coreNameBuilder);
}
BrandName = coreNameBuilder.ToString().Trim().TrimEnd(' ').Replace("\0", string.Empty);
Name = Cpuid.RemoveSpechialBrandSymbolsFromString(coreNameBuilder);
Family = ((DataRegisters[1].Eax & 0x0FF00000) >> 20) + ((DataRegisters[1].Eax & 0x0F00) >> 8);
Model = ((DataRegisters[1].Eax & 0x0F0000) >> 12) + ((DataRegisters[1].Eax & 0xF0) >> 4);
Stepping = DataRegisters[1].Eax & 0x0F;
ApicId = (DataRegisters[1].Ebx >> 24) & 0xFF;
if (Vendor == CpuVendor.Intel)
{
var maxCoreAndThreadIdPerPackage = (DataRegisters[1].Ebx >> 16) & 0xFF;
uint maxCoreIdPerPackage;
if (maxCpuidLen >= 4)
{
maxCoreIdPerPackage = ((DataRegisters[4].Eax >> 26) & 0x3F) + 1;
}
else
{
maxCoreIdPerPackage = 1;
}
_threadMaskWith = MathUtils.NextLog2(maxCoreAndThreadIdPerPackage / maxCoreIdPerPackage);
_coreMaskWith = MathUtils.NextLog2(maxCoreIdPerPackage);
}
else if (Vendor == CpuVendor.Amd)
{
uint corePerPackage;
if (maxCpuidExtLen >= 8)
{
corePerPackage = (DataRegistersExt[8].Ecx & 0xFF) + 1;
}
else
{
corePerPackage = 1;
}
_threadMaskWith = 0;
_coreMaskWith = MathUtils.NextLog2(corePerPackage);
}
else
{
_threadMaskWith = 0;
_coreMaskWith = 0;
}
ProcessorId = ApicId >> (int)(_coreMaskWith + _threadMaskWith);
CoreId = (ApicId >> (int)_threadMaskWith) - (ProcessorId << (int)_coreMaskWith);
ThreadId = ApicId - (ProcessorId << (int)(_coreMaskWith + _threadMaskWith)) - (CoreId << (int)_threadMaskWith);
}
