/**
* Single socket call to determine the frequency that the northbridges must run.
*
* This function simply returns the executing core's NB frequency, and that all
* NB frequencies are equivalent.
*
* @param[in] NbPstate NB P-state number to check (0 = fastest)
* @param[in] PlatformConfig Platform profile/build option config structure.
* @param[out] SystemNbCofNumerator NB frequency numerator for the system in MHz
* @param[out] SystemNbCofDenominator NB frequency denominator for the system
* @param[out] SystemNbCofsMatch Whether or not all NB frequencies are equivalent
* @param[out] NbPstateIsEnabledOnAllCPUs Whether or not NbPstate is valid on all CPUs
* @param[in] StdHeader Config handle for library and services
*
* @retval TRUE At least one processor has NbPstate enabled.
* @retval FALSE NbPstate is disabled on all CPUs
*
*/
BOOLEAN
GetSystemNbCofSingle (
IN UINT32 NbPstate,
IN PLATFORM_CONFIGURATION *PlatformConfig,
OUT UINT32 *SystemNbCofNumerator,
OUT UINT32 *SystemNbCofDenominator,
OUT BOOLEAN *SystemNbCofsMatch,
OUT BOOLEAN *NbPstateIsEnabledOnAllCPUs,
IN AMD_CONFIG_PARAMS *StdHeader
)
{
UINT32 Ignored;
PCI_ADDR PciAddress;
CPU_SPECIFIC_SERVICES *FamilySpecificServices;
PciAddress.AddressValue = MAKE_SBDFO (0, 0, 24, 0, 0);
*SystemNbCofsMatch = TRUE;
GetCpuServicesOfCurrentCore (&FamilySpecificServices, StdHeader);
*NbPstateIsEnabledOnAllCPUs = FamilySpecificServices->GetNbPstateInfo (FamilySpecificServices,
PlatformConfig,
&PciAddress,
NbPstate,
SystemNbCofNumerator,
SystemNbCofDenominator,
&Ignored,
StdHeader);
return *NbPstateIsEnabledOnAllCPUs;
}
/**
* Multisocket call to determine the frequency that the northbridges must run.
*
* This function loops through all possible socket locations, comparing the
* maximum NB frequencies to determine the slowest. This function also
* determines if all coherent NB frequencies are equivalent.
*
* @param[in] NbPstate NB P-state number to check (0 = fastest)
* @param[in] PlatformConfig Platform profile/build option config structure.
* @param[out] SystemNbCofNumerator NB frequency numerator for the system in MHz
* @param[out] SystemNbCofDenominator NB frequency denominator for the system
* @param[out] SystemNbCofsMatch Whether or not all NB frequencies are equivalent
* @param[out] NbPstateIsEnabledOnAllCPUs Whether or not NbPstate is valid on all CPUs
* @param[in] StdHeader Config handle for library and services
*
* @retval TRUE At least one processor has NbPstate enabled.
* @retval FALSE NbPstate is disabled on all CPUs
*
*/
BOOLEAN
GetSystemNbCofMulti (
IN UINT32 NbPstate,
IN PLATFORM_CONFIGURATION *PlatformConfig,
OUT UINT32 *SystemNbCofNumerator,
OUT UINT32 *SystemNbCofDenominator,
OUT BOOLEAN *SystemNbCofsMatch,
OUT BOOLEAN *NbPstateIsEnabledOnAllCPUs,
IN AMD_CONFIG_PARAMS *StdHeader
)
{
UINT32 Socket;
UINT8 Module;
UINT32 CurrentNbCof;
UINT32 CurrentDivisor;
UINT32 CurrentFreq;
UINT32 LowFrequency;
UINT32 Ignored32;
BOOLEAN FirstCofNotFound;
BOOLEAN NbPstateDisabled;
BOOLEAN IsNbPstateEnabledOnAny;
PCI_ADDR PciAddress;
AGESA_STATUS Ignored;
CPU_SPECIFIC_SERVICES *FamilySpecificServices;
// Find the slowest NB COF in the system & whether or not all are equivalent
LowFrequency = 0xFFFFFFFF;
*SystemNbCofsMatch = TRUE;
*NbPstateIsEnabledOnAllCPUs = FALSE;
IsNbPstateEnabledOnAny = FALSE;
FirstCofNotFound = TRUE;
NbPstateDisabled = FALSE;
for (Socket = 0; Socket < GetPlatformNumberOfSockets (); Socket++) {
if (IsProcessorPresent (Socket, StdHeader)) {
GetCpuServicesOfSocket (Socket, (CONST CPU_SPECIFIC_SERVICES **)&FamilySpecificServices, StdHeader);
for (Module = 0; Module < GetPlatformNumberOfModules (); Module++) {
if (GetPciAddress (StdHeader, Socket, Module, &PciAddress, &Ignored)) {
break;
}
}
if (FamilySpecificServices->GetNbPstateInfo (FamilySpecificServices,
PlatformConfig,
&PciAddress,
NbPstate,
&CurrentNbCof,
&CurrentDivisor,
&Ignored32,
StdHeader)) {
ASSERT (CurrentDivisor != 0);
CurrentFreq = (CurrentNbCof / CurrentDivisor);
if (FirstCofNotFound) {
*SystemNbCofNumerator = CurrentNbCof;
*SystemNbCofDenominator = CurrentDivisor;
LowFrequency = CurrentFreq;
IsNbPstateEnabledOnAny = TRUE;
if (!NbPstateDisabled) {
*NbPstateIsEnabledOnAllCPUs = TRUE;
}
FirstCofNotFound = FALSE;
} else {
if (CurrentFreq != LowFrequency) {
*SystemNbCofsMatch = FALSE;
if (CurrentFreq < LowFrequency) {
LowFrequency = CurrentFreq;
*SystemNbCofNumerator = CurrentNbCof;
*SystemNbCofDenominator = CurrentDivisor;
}
}
}
} else {
NbPstateDisabled = TRUE;
*NbPstateIsEnabledOnAllCPUs = FALSE;
}
}
}
return IsNbPstateEnabledOnAny;
}