AM6442: TCM access

Hello Holger,

On the AM243x/AM64x R5F Subsystem:

• Each R5F core has private TCM (64 KB per core).

• TCM is tightly coupled to the CPU for performance.

• Each core can access any core’s TCM via its SOC address space through the SoC interconnect.

Proposed Method

1. Allocate TCM for Core0

• Core0 reserves a portion of its TCM for a shared data buffer.

2. Notify Core1 via IPC

• Core0 sends an IPC message to Core1 once data is ready.

• This ensures proper synchronization, preventing Core1 from reading incomplete data.

3. Core1 Reads via Global Address Space (Mapped Through SoC)

• Core1 accesses Core0’s TCM buffer using its SOC address space, which maps to the same physical memory via the SoC interconnect.

Regards,

Anil.