// IsCefSupported: Check if Core Effectiver Frequency is supported by the CPU
bool IsCefSupported()
{
#define CPUID_FnThermalAndPowerManagement 6
#define CPUID_FnThermalAndPowerManagement_ECX_EffFreq (1 << 0)
#define ECX_OFFSET 2
bool result = false;
AMDTInt32 cpuInfo[4] = { -1 };
getCpuid(CPUID_FnThermalAndPowerManagement, cpuInfo); // vendor information
// Effective Frequency is supported
result = (cpuInfo[ECX_OFFSET] & CPUID_FnThermalAndPowerManagement_ECX_EffFreq) != 0;
return result;
}
// GetCpuFamilyDetails: Read Cpu family, model id and wheather it is a AMD platform from CPU id instruction
AMDTResult GetCpuFamilyDetails(AMDTUInt32* pFamily, AMDTUInt32* pModel, bool* pIsAmd)
{
AMDTInt32 cpuInfo[4] = { -1 };
char vendorId[20];
bool isAmd = false;
AMDTUInt32 family;
AMDTUInt32 model;
if (nullptr == pFamily || nullptr == pModel || nullptr == pIsAmd)
{
return AMDT_ERROR_INVALIDARG;
}
getCpuid(0, cpuInfo); // vendor information
memcpy(vendorId, &cpuInfo[1], 4);
memcpy(vendorId + 4, &cpuInfo[3], 4);
memcpy(vendorId + 8, &cpuInfo[2], 4);
vendorId[12] = '\0';
if (0 == strcmp(vendorId, "AuthenticAMD"))
{
isAmd = true;
}
// read the family and model details
memset(cpuInfo, 0, sizeof(cpuInfo));
getCpuid(1, cpuInfo);
// Family is an 8-bit value and is defined as:
// Family[7:0] = ({0000b,BaseFamily[3:0]} + ExtFamily[7:0]).
family = (cpuInfo[0] & CPU_BASE_FAMILY_MASK) >> 8;
if (CPU_FAMILY_EXTENDED == family)
{
family += (cpuInfo[0] & CPU_EXT_FAMILY_MASK) >> 20;
}
// Handler get cpuid and other system information from current platform
int handlerInPlatform(char* parm)
{
// first message for platform mode
(*routines[OUTTEXT])("Get platform data...\n"); // Handler console/file
int retCpuid = 0, retRdtsc = 0, retXcr0 = 0;
char sup[] = "supported";
char nsup[] = "not supported";
char err[] = "error";
char *s1 = nsup, *s2 = nsup;
char temp[MAX_STRING];
// cpuid
retCpuid = getCpuid(pointerBinary, MAX_BINARY);
if (retCpuid <= 0)
{
snprintf(temp, MAX_BINARY, "CPUID not supported or locked\n");
}
else if (retCpuid > MAX_ENTRIES)
{
snprintf(temp, MAX_BINARY, "CPUID functions count too big\n");
}
else
{
pointerBinary += retCpuid * BINARY_ENTRY;
// rdtsc
retRdtsc = getRdtsc(pointerBinary);
// analysing status, default pointers "not supported"
if (retRdtsc > 0) { s1 = sup; pointerBinary += BINARY_ENTRY; }
else if (retRdtsc < 0) s1 = err;
// xcr0
retXcr0 = getXcr0(pointerBinary);
// analysing status, default pointers "not supported"
if (retXcr0 > 0) { s2 = sup; pointerBinary += BINARY_ENTRY; }
else if (retXcr0 < 0) s2 = err;
// print
snprintf(temp, MAX_BINARY,
"%s%d%s%s%s%s\n",
"CPUID functions supported: ", retCpuid,
", TSC ", s1,
", XCR0 control ", s2 );
}
// summary string
(*routines[OUTTEXT])(temp); // Handler console/file
}
