Samsung S5PC100 User Manual page 311

BUS CONFIGURATION S5PC100 USER'S MANUAL (REV1.0)
In S5PC100, the QoS scheme will be used for restricting the transactions of the background operation when there
is heavy real time traffic. The masters attached to AXI_B0 are classified as background operation which requires
a high bandwidth but does not require to be real time traffic. The QoS scheme is meaningless to the master
interface which is connected to the slave whose combined acceptance capability is only "1". Therefore, the QoS
feature is only applied to the M0 port of AXI_D0 interconnect in S5PC100.
The fixed round robin arbitration was proposed to allocate the proper bandwidth to each slave interface. Therefore,
this arbitration is beneficial to the multimedia master bus such as AXI_D1 which requires correct bandwidth
allocation. The fixed round robin arbitration scheme is only applied to AXI_D1.
3.1-2