The LDM PC ^ instructions with base address register write-back might be counted twice in the Performance Monitor event 0x0A, which is counting the number of exception returns.
The associated PMUEVENT[11] signal is also affected by this issue, and might be asserted twice by a single LDM PC ^ with base address register write-back.
| Impact: | Trivial. This issue causes the count of exception returns to be imprecise. The error rate depends on the ratio between exception returns of the form LDM PC ^ with base address register write-back and the total number of exceptions returns. The impact of this issue is typically negligible. |
Work-around: | None. |
Configurations Affected: | Systems that use the CPUs. |
| Device Revision(s) Affected: | All. No plan to fix. Refer to (Xilinx Answer 47916) - Zynq-7000 AP Silicon Revision Differences Answer Record. |
| Answer Number | Answer Title | Version Found | Version Resolved |
|---|---|---|---|
| 47916 | Zynq-7000 AP SoC Devices - Silicon Revision Differences | N/A | N/A |
| AR# 52036 | |
|---|---|
| Date | 05/25/2018 |
| Status | Active |
| Type | Design Advisory |
| Devices | |