Summary and Quick Reference - Summary and Quick Reference - 2026.1 English - UG1186

Libmetal and OpenAMP User Guide (UG1186)
Document ID
UG1186
Release Date
2026-06-24
Version
2026.1 English

Memory Map Quick Reference

The following memory map shows the key regions that support resource tables, firmware, vrings, shared buffers, TCM, and IPI communication.

  • 0x09800000 - 0x098000ff: Use this region for the Resource Table (256 B).
  • 0x09800100 - 0x0985ffff: Use this region for the RPU firmware DDR region (383 KB).
  • 0x09860000 - 0x09863fff: Use this region for VRing0, which carries APU-to-RPU TX data (16 KB).
  • 0x09864000 - 0x09867fff: Use this region for VRing1, which carries RPU-to-APU RX data (16 KB).
  • 0x09868000 - 0x098a7fff: Use this region for the shared buffer pool (256 KB).
  • 0xeba00000 - 0xeba0ffff: Use this region for R52 ATCM (64 KB) in the global view.
  • 0xeba10000 - 0xeba17fff: Use this region for R52 BTCM (32 KB) in the global view.
  • 0xeba20000 - 0xeba27fff: Use this region for R52 CTCM (32 KB) in the global view.
  • 0xeb330000: Use this address for APU IPI0 control.
  • 0xeb3b1000: Use this address for the APU-to-RPU no-buffer IPI and RPU IPI control.
  • 0xeb3b0000: Use this address for the RPU-to-APU no-buffer IPI.

Common Commands

The following commands help you start or stop the RPU, load RPMsg modules, and test communication.

  • Start the RPU:
    echo "rpmsg_multi_services.elf" > /sys/class/remoteproc/remoteproc0/firmware
echo start > /sys/class/remoteproc/remoteproc0/state
  • Stop the RPU:
    echo stop > /sys/class/remoteproc/remoteproc0/state
  • Load RPMsg modules:
    modprobe rpmsg_char rpmsg_ctrl rpmsg_tty
  • Test RPMsg communication:
    • Use this test to send and receive data through /dev/ttyRPMSG0:
      cat /dev/ttyRPMSG0 &
echo"test" > /dev/ttyRPMSG0
    • Use this test if you have rpmsg-utils installed:
      rpmsg_ping /dev/rpmsg0

Key References

The following references point you to the main source repositories, device tree files, and example application.