On 3/12/26 14:36, Peng Fan (OSS) wrote: > This series adds remoteproc support for the i.MX94 family, including the > CM70, CM71, and CM33S cores, and introduces a new device‑tree property to > correctly derive the hardware reset vector for Cortex‑M processors whose > ELF entry point does not directly correspond to the actual reset address. > > Background: > Cortex‑M processors fetch their initial SP and PC from a fixed reset vector > table. While ELF images embed the entry point (e_entry), this value is > not always aligned to the hardware reset address. On platforms such as > i.MX94 CM33S, masking is required to compute the correct reset vector > address before programming the SoC reset registers.
What happens if the reset vector is at 0 and the e_entry point is at 0x800...? In this case masking will no longer work! Can we implement a generic approach? > > Similarly, on i.MX95, the existing implementation always programs a reset > vector of 0x0, which only works when executing entirely from TCM. When > firmware is loaded into DDR, the driver must pass the correct reset vector > to the SM CPU/LMM interfaces. > > This series addresses these issues and provides the necessary DT bindings > and driver support. > > Summary of patches: > [1]dt-bindings: remoteproc: imx-rproc: Introduce fsl,reset-vector-mask > Adds a new DT property allowing SoCs to specify a mask for deriving the > hardware reset vector from the ELF entry point. > > [2]dt-bindings: remoteproc: imx-rproc: Support i.MX9[4,52] > Adds compatible strings for i.MX94 CM70, CM71, and CM33S processors. > > [3]remoteproc: imx_rproc: Pass bootaddr to SM CPU/LMM reset vector > Ensures the correct reset vector is passed to SM APIs by introducing a > driver‑level helper (imx_rproc_get_boot_addr()) that applies the > reset‑vector mask. > > [4]remoteproc: imx_rproc: Add support for i.MX94 remoteproc > Adds address translation tables and configuration data for CM70, CM71, > and CM33S, enabling full remoteproc operation on i.MX94. > > Signed-off-by: Peng Fan <[email protected]> > --- > Peng Fan (4): > dt-bindings: remoteproc: imx-rproc: Introduce fsl,reset-vector-mask > dt-bindings: remoteproc: imx-rproc: Support i.MX94 > remoteproc: imx_rproc: Pass bootaddr to SM CPU/LMM reset vector > remoteproc: imx_rproc: Add support for i.MX94 > > .../bindings/remoteproc/fsl,imx-rproc.yaml | 9 +++ > drivers/remoteproc/imx_rproc.c | 85 > +++++++++++++++++++++- > 2 files changed, 91 insertions(+), 3 deletions(-) > --- > base-commit: 7109a2155340cc7b21f27e832ece6df03592f2e8 > change-id: 20260311-imx943-rproc-2050e00b65f7 > > Best regards,
