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nuttx/arch/arm
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Ulaş Sertan Kemeç a2edd99159 arch/arm/am67: Add rptun IPC with the Linux A53 (remoteproc/rpmsg). 
Connects the R5F to Linux remoteproc over the NAVSS mailbox.

The mailbox ISR only drains the FIFO and acknowledges; OpenAMP delivery is
deferred to HPWORK, because the rpmsg rx path takes mutexes and allocates.

The resource table publishes two vdevs, rpmsg and virtio-net, leaving every
vring address FW_RSC_ADDR_ANY: Linux allocates them from the R5F DMA pool and
rejects fixed addresses outside it.

Shared IPC memory is mapped Non-cacheable, since the R5F is not coherent with
the A53 and cached mappings leave NuttX reading stale vring state.

Also drops the duplicate arm_mpu.c from CHIP_CSRCS.

Assisted-by: Claude Code:claude-fable-5
Signed-off-by: Ulaş Sertan Kemeç <sertan.usk@gmail.com>
2026-09-21 16:28:36 +08:00
..
include arch/arm/imxrt: Add support for IOMUXC and rgpio for imxrt118x 2026-09-19 22:38:45 +08:00
src arch/arm/am67: Add rptun IPC with the Linux A53 (remoteproc/rpmsg). 2026-09-21 16:28:36 +08:00
CMakeLists.txt
Kconfig arch/arm/am67: Add rptun IPC with the Linux A53 (remoteproc/rpmsg). 2026-09-21 16:28:36 +08:00