/// <summary>
/// Gets the cache topology leaf.
/// </summary>
/// <param name="leaf">The leaf number to use.</param>
/// <exception cref="NotSupportedException">
/// A cache entry is fully associative, with the number of sets not one.
/// </exception>
/// <remarks>
/// The Intel leaf 4, and AMD leaf 8000001D have the same implementation, this method provides for common code
/// between the two. If the exception <see cref="NotSupportedException"/> occurs, this should be reported with a
/// CPUID dump for investigation.
/// </remarks>
protected void GetCacheTopologyLeaf(int leaf)
{
int subleaf = 0;
CpuIdRegister cache = m_Cpu.CpuRegisters.GetCpuId(leaf, subleaf);
while (cache != null && (cache.Result[0] & 0xF) != 0)
{
int ltype = cache.Result[0] & 0xF;
CacheType ctype = CacheType.Invalid;
switch (ltype)
{
case 1:
ctype = CacheType.Data;
break;
case 2:
ctype = CacheType.Instruction;
break;
case 3:
ctype = CacheType.Unified;
break;
}
if (ctype != CacheType.Invalid)
{
bool fullyAssoc = (cache.Result[0] & 0x200) != 0;
int sets = cache.Result[2] + 1;
if (fullyAssoc && sets != 1)
{
throw new NotSupportedException("A cache entry is fully associative, with the number of sets not one");
}
int level = (cache.Result[0] >> 5) & 0x7;
int lineSize = (cache.Result[1] & 0xFFF) + 1;
int partitions = ((cache.Result[1] >> 12) & 0x3FF) + 1;
int ways = ((cache.Result[1] >> 22) & 0x3FF) + 1;
CacheTopoCpu cacheTopoCpu = new CacheTopoCpu(level, ctype, ways, lineSize, sets, partitions);
int numSharingCache = Log2Pof2(((cache.Result[0] >> 14) & 0xFFF) + 1);
cacheTopoCpu.Mask = ~(-1 << numSharingCache);
Topology.CacheTopology.Add(cacheTopoCpu);
}
subleaf++;
cache = m_Cpu.CpuRegisters.GetCpuId(leaf, subleaf);
}
}
public bool Equals(CacheTopo x, CacheTopo y)
{
if (x == null && y == null)
{
return(true);
}
if (x == null || y == null)
{
return(false);
}
if (x.GetType() != y.GetType())
{
return(false);
}
if (x.CacheType != y.CacheType || x.Level != y.Level)
{
return(false);
}
if (x is CacheTopoCpu xc)
{
CacheTopoCpu yc = (CacheTopoCpu)y;
return
(xc.Associativity == yc.Associativity &&
xc.LineSize == yc.LineSize &&
xc.Sets == yc.Sets &&
xc.Size == yc.Size);
}
else if (x is CacheTopoTlb xt)
{
CacheTopoTlb yt = (CacheTopoTlb)y;
return
(xt.Associativity == yt.Associativity &&
xt.Sets == yt.Sets &&
xt.Entries == yt.Entries);
}
return(false);
}
