GR740-UM-DS, Nov 2017, Version 1.7 430 www.cobham.com/gaisler
GR740
36.2.1 AHB statistics
The core will generate events that can be monitored with the LEON statistics unit (L4STAT). The sta-
tistical outputs can be filtered by the AHB trace buffer filters, this is controlled by the Performance
counter Filter bit (PF) in the AHB trace buffer control register. The core can collect data for the events
listed in table 565 below
Table 565.AHB events
Event Description Note
idle HTRANS=IDLE Active when HTRANS IDLE is driven on the AHB slave inputs and
slave has asserted HREADY.
busy HTRANS=BUSY Active when HTRANS BUSY is driven on the AHB slave inputs and
slave has asserted HREADY.
nseq HTRANS=NONSEQ Active when HTRANS NONSEQ is driven on the AHB slave inputs
and slave has asserted HREADY.
seq HTRANS=SEQ Active when HTRANS SEQUENTIAL is driven on the AHB slave
inputs and slave has asserted HREADY.
read Read access Active when HTRANS is SEQUENTIAL or NON-SEQUENTIAL,
slave has asserted HREADY and the HWRITE input is low.
write Write access Active when HTRANS is SEQUENTIAL or NON-SEQUENTIAL,
slave has asserted HREADY and the HWRITE input is high.
hsize Transfer size Active when HTRANS is SEQUENTIAL or NON-SEQUENTIAL,
slave has asserted HREADY.
ws Wait state Active when HREADY input to AHB slaves is low and AMBA
response is OKAY.
retry RETRY response Active when master receives RETRY response
split SPLIT response Active when master receives SPLIT response
To Next Page
Loading...
Need help?
General
