Intel 9150N NE80567KE025015 User Manual
Product codes
NE80567KE025015
Intel
®
Itanium
®
Processor 9300 Series Datasheet
93
Thermal Specifications
c. If T>=T
THERMWARN
, then the processor will issue a fatal MCA and PROCHOT_N
will remain asserted; the Foxton controller becomes non-functional.
The processor cannot recover except via cold reset.
The processor will continue to throttle if T>=T
The processor cannot recover except via cold reset.
The processor will continue to throttle if T>=T
PROCHOT
when it comes out of
reset.
Data integrity is not guaranteed beyond T
Data integrity is not guaranteed beyond T
THERMWARN
.
d. If T>= T
THERMTRIP
, then the thermal management system will assert
THERMTRIP_N and halt processor clocks.
T
T
THERMTRIP
is enforced to prevent physical damage to the processor.
Cold reset is required to recover.
5.1.2.2
Implementation
The Intel Itanium processor 9300 series thermal management features are designed to
operate independently of software, including the operating system. The thermal
sensors are on the die of the processor and the frequency and voltage control resides
completely on the processor. In order to reduce the processor power while throttling,
some execution units on the processor are shut down, limiting the processor to
executing only one instruction per cycle.
operate independently of software, including the operating system. The thermal
sensors are on the die of the processor and the frequency and voltage control resides
completely on the processor. In order to reduce the processor power while throttling,
some execution units on the processor are shut down, limiting the processor to
executing only one instruction per cycle.
5.1.3
Thermal Alert
THERMALERT_N is a programmable thermal alert signal which is part of the Intel
Itanium processor 9300 series thermal management system. THERMALERT_N is
asserted when the measured temperature from the processor’s digital thermometer
(DT) is equal to or exceeds
QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh below PROCHOT.
THERMALERT_N will deassert after the DT readout is below PROCHOT by the sum of the
values in QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh and
QR_CSR_IPF_THERM_CONFIG.thermalert_deassert_thresh. Intel recommends using
the values listed in the PIROM when programming
QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh and
QR_CSR_IPF_THERM_CONFIG.thermalert_deassert_thresh. The default values for
QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh and
QR_CSR_IPF_THERM_CONFIG.thermalert_deassert_thresh are 10C and 2C
respectively.
Itanium processor 9300 series thermal management system. THERMALERT_N is
asserted when the measured temperature from the processor’s digital thermometer
(DT) is equal to or exceeds
QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh below PROCHOT.
THERMALERT_N will deassert after the DT readout is below PROCHOT by the sum of the
values in QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh and
QR_CSR_IPF_THERM_CONFIG.thermalert_deassert_thresh. Intel recommends using
the values listed in the PIROM when programming
QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh and
QR_CSR_IPF_THERM_CONFIG.thermalert_deassert_thresh. The default values for
QR_CSR_IPF_THERM_CONFIG.thermalert_assert_hot_thresh and
QR_CSR_IPF_THERM_CONFIG.thermalert_deassert_thresh are 10C and 2C
respectively.
This signal can be used by the platform to implement thermal regulation features such
as generating an external interrupt to tell the operating system that the processor core
die temperature is increasing.
as generating an external interrupt to tell the operating system that the processor core
die temperature is increasing.
5.1.4
T
CONTROL
T
CONTROL
is a thermal monitoring setpoint which is specified as a relative temperature
in degrees Celsius below the PROCHOT_N threshold. The minimum value of the
T
T
CONTROL
and the default value is available in the
PIROM. T
CONTROL
value applies to the full range of the processor operating power and is
independent of the processor core configuration or executed applications. A server
thermal management controller can monitor the processor temperature via the Digital
Thermal Sensor (DTS) readout, and use the T
thermal management controller can monitor the processor temperature via the Digital
Thermal Sensor (DTS) readout, and use the T
CONTROL
value as the threshold at which
active system thermal management must be engaged. This will ensure reliable
processor operation over its expected life. Note that no internal response is generated
by the processor at T
processor operation over its expected life. Note that no internal response is generated
by the processor at T
CONTROL
. Customers can utilize THERMALERT_N as an interrupt to
program an alternative temperature monitoring threshold value to provide margin in