zephyr/boards/x86/quark_se_c1000_devboard/Kconfig.defconfig

64 lines
1010 B
Plaintext
Raw Normal View History

if BOARD_QUARK_SE_C1000_DEVBOARD
config BOARD
default "quark_se_c1000_devboard"
config UART_QMSI_0_HW_FC
def_bool y
kernel: tickless: Add tickless kernel support Adds event based scheduling logic to the kernel. Updates management of timeouts, timers, idling etc. based on time tracked at events rather than periodic ticks. Provides interfaces for timers to announce and get next timer expiry based on kernel scheduling decisions involving time slicing of threads, timeouts and idling. Uses wall time units instead of ticks in all scheduling activities. The implementation involves changes in the following areas 1. Management of time in wall units like ms/us instead of ticks The existing implementation already had an option to configure number of ticks in a second. The new implementation builds on top of that feature and provides option to set the size of the scheduling granurality to mili seconds or micro seconds. This allows most of the current implementation to be reused. Due to this re-use and co-existence with tick based kernel, the names of variables may contain the word "tick". However, in the tickless kernel implementation, it represents the currently configured time unit, which would be be mili seconds or micro seconds. The APIs that take time as a parameter are not impacted and they continue to pass time in mili seconds. 2. Timers would not be programmed in periodic mode generating ticks. Instead they would be programmed in one shot mode to generate events at the time the kernel scheduler needs to gain control for its scheduling activities like timers, timeouts, time slicing, idling etc. 3. The scheduler provides interfaces that the timer drivers use to announce elapsed time and get the next time the scheduler needs a timer event. It is possible that the scheduler may not need another timer event, in which case the system would wait for a non-timer event to wake it up if it is idling. 4. New APIs are defined to be implemented by timer drivers. Also they need to handler timer events differently. These changes have been done in the HPET timer driver. In future other timers that support tickles kernel should implement these APIs as well. These APIs are to re-program the timer, update and announce elapsed time. 5. Philosopher and timer_api applications have been enabled to test tickless kernel. Separate configuration files are created which define the necessary CONFIG flags. Run these apps using following command make pristine && make BOARD=qemu_x86 CONF_FILE=prj_tickless.conf qemu Jira: ZEP-339 ZEP-1946 ZEP-948 Change-Id: I7d950c31bf1ff929a9066fad42c2f0559a2e5983 Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
2017-02-06 11:37:19 +08:00
if SYS_POWER_MANAGEMENT
config BUSY_WAIT_USES_ALTERNATE_CLOCK
default y
endif
config BT_MONITOR_ON_DEV_NAME
default UART_QMSI_1_NAME if BT_DEBUG_MONITOR
if IEEE802154_CC2520
config SPI
def_bool y
config GPIO
def_bool y
config IEEE802154_CC2520_SPI_DRV_NAME
default SPI_1_NAME
config IEEE802154_CC2520_SPI_FREQ
default 4
config IEEE802154_CC2520_SPI_SLAVE
default 1
if GPIO_QMSI
config IEEE802154_CC2520_GPIO_0_NAME
default GPIO_QMSI_0_NAME
config IEEE802154_CC2520_GPIO_1_NAME
default GPIO_QMSI_1_NAME
endif # GPIO_QMSI
if SPI_QMSI
config SPI_CS_GPIO
def_bool y
config SPI_1_CS_GPIO_PORT
default GPIO_QMSI_0_NAME
config SPI_1_CS_GPIO_PIN
default 11
config IEEE802154_CC2520_GPIO_0_NAME
string
default GPIO_QMSI_0_NAME
config IEEE802154_CC2520_GPIO_1_NAME
string
default GPIO_QMSI_1_NAME
endif
endif # IEEE802154_CC2520
endif # BOARD_QUARK_SE_C1000_DEVBOARD