Free-RTOS interrupt priority

I use Free-RTOS in STM32 microcontroller. How can I obtain information on interrupt priority? And How Can I configure the priority in FreeRTOS? I find nothing about the priority in www.freertos.org, can someone give me a hand?

Free-RTOS interrupt priority

http://www.freertos.org/RTOS-Cortex-M3-M4.html

Free-RTOS interrupt priority

thank you!