3.3.5 QoS Threshold Register

This register stores QoS threshold values for read and write requests. These thresholds categorize requests as high priority or low priority.

Usage constraints
Accessible using only Secure accesses, unless you set the Secure Access Register to permit Non-secure accesses.
Configurations
Available in all CCI-550 configurations.
Attributes
See 3.2 Register summary for more information.
The following figure shows the bit assignments.
Figure 3-5 qos_threshold register bit assignments
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The following table shows the bit assignments.

Table 3-6 awqos_ovr register bit assignments

Bits
Name
Function
[31:20]
-
Reserved.
[19:16]
w_qv_thresh_high
Write QoS threshold for high priority requests.
[15:4]
-
Reserved.
[3:0]
r_qv_thresh_high
Read QoS threshold for high priority requests.

Note

The reset values for this register are set at design-time using the QOS_THRESHOLD_UPPER parameter. The implementer can set QOS_THRESHOLD_UPPER to an appropriate value for the system, removing the requirement to program this register.
Related reference
3.3.2 Secure Access Register
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