Running Zephyr RTOS on Cadence® Tensilica® HiFi 4 DSP
summary
Zephyr boots on the Cadence Tensilica HiFi 4 DSP while Linux runs on the Cortex‑A, with firmware loaded and controlled via remoteproc + rpmsg + mailbox and OpenAMP used for higher‑level IPC. Workflows include hello_world and OpenAMP samples, synchronization and dining philosophers and porting Sound Open Firmware; resource layout requires a resource table in linker script and matching device tree virtual rings. Implementation works but needs custom memcpy/memset for 4‑byte write restrictions and cache invalidation and careful shared‑memory sizing for buffers.
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chapters (15)
- 0:00Introduction
- 1:06Hardware overview i.MX 810 Plus
- 3:12Zephyr support for HiFi 4 DSP
- 4:59Generic DSP loader
- 7:06Linux Zephyr communication
- 7:47Remoteproc firmware loading
- 9:11Remoteproc on i.MX DSP
- 12:04Zephyr samples on HiFi 4
- 12:26RPMsg messaging
- 16:21Mailbox inter-core comms
- 19:17OpenMP for IPC
- 20:43End-to-end workflow
- 22:34Challenges documentation
- 24:18Future plans upstreaming
- 25:02Q&A
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