Samsung S5PC110 Manual page 590

S5PC110_UM
1.4.1.22 Quality of Service Configuration Register n (QosConfig n, R/W, Address = 0xF000_0064 + 8n
(n=0~15, integer), 0xF140_0064 + 8n (n=0~15, integer)
QOSCONFIGn
qos_mask [31:16]
qos_id [15:0]
NOTE: If qos fast is enabled, the QoSConfig(n) of 4,5,6,7,8,9,10,11,13,14 & 15 are dedicated to each specific IP, and it's
qos_id & qos_mask value should be set proper to each IP's Transaction ID
Bit
QoS Mask Bits
This is used to mask the incoming ARID/AWID to compare with
the qos_id.
For example, to have 0b00110XX000 IDs the same QoS, the
4th and 5th bits must be masked. Therefore, qos_mask would
be 0b1111100111.
QoS ID
This is used to compare with the masked ARID/AWID to check
whether its timeout counter should be used for QoS.
After applying the qos_mask to these ARID/AWID, it is
compared with qos_id. The qos_id would be 0b001100_0000
using the example above. Comparing the masked ID, if the
result is equal to the qos_id, then the QoSControl0.qos_cnt is
applied to this ARID/AWID transaction for timeout.
Don't care bits must be assigned zeros.
Description
1 DRAM CONTROLLER
Initial
R/W
State
R/W 0x0
R/W 0x0
1-47