Filter Registers, GICP_FRn
These registers configure the filtering of event counter n. The GIC-600 supports five counters, n = 0-4.
The GICP_FRn characteristics are:
|Usage constraints||There are no usage constraints.|
|Configurations||Available in all GIC-600 configurations.|
|Attributes||See GICP register summary.|
The following figure shows the bit assignments.
Figure 4-46 GICP_FRn bit assignments
The following table shows the bit assignments.
Table 4-62 GICP_FRn bit assignments
0 = Filter on range.
1 = Filter on an exact match.
If the corresponding GICP_EVTYPERn.EVENT indicates an event that cannot be filtered, then the value in this register is ignored.
When the corresponding FilterEncoding == 1, counter n counts events that are only associated with an exact match of the FilterType.
When FilterEncoding == 0, this field is encoded so that the least-significant bit indicates the uppermost of a contiguous span of least-significant FilterType bits that are ignored for the purposes of matching.