The L3_MAIN interconnect implements five performance monitoring probes on DDR memory channels. The traffic statistics are computed within a user-defined window and periodically reported to the user through the CT_STM interface.
SC_SDRAM supports the following main features:
- Four probe inputs:
- Probe 0 (128 bit-wide) – EMIF1_SYS
- Probe 1 (128 bit-wide) – Reserved
- Probe 2 (128 bit-wide) – MPU_MA_P1
- Probe 3 (128 bit-wide) – Reserved
- Eight 32-bit counters shared concurrently:
- Counter 0 with two filters
- Counter 1 with one filter
- Counter 2 with two filters
- Counter 3 with one filter
- Counter 4 with one filter
- Counter 5 with one filter
- Counter 6 with one filter
- Counter 7 with one filter
- Simple (with one element) or complex (with several elements) filters available
- Filtering according to:
- Initiator of traffic
- Access priorities
- OCP address
- No latency counter. Only bandwidth measurement on this collector.
- 32-bit collecting window counter
- Dump identifier is 0x0 (tie-off value)
- Dumps frames at L3_MAIN interconnect slave address 0x19 (L3_INSTR)
Table 34-20 shows the SC_SDRAM port mapping.
Table 34-20 SC_SDRAM Port MappingProbe | Description | Link | Port |
---|
0 | EMIF1_SYS | OCP REQ | 0 |
OCP RSP | 1 |
1 | RESERVED | OCP REQ | 2 |
OCP RSP | 3 |
2 | MPU_MA_P1 | OCP REQ | 4 |
OCP RSP | 5 |
3 | RESERVED | OCP REQ | 6 |
OCP RSP | 7 |