On 23:45-20230807, Hari Nagalla wrote:
> The AM64x SoCs of the TI K3 family have a Cortex M4F core in the MCU
> domain. This core can be used by non safety applications as a remote
> processor. When used as a remote processor with virtio/rpmessage IPC,
> two carveout reserved memory nodes are needed. The first region is used
> as a DMA pool for the rproc device, and the second region will furnish
> the static carveout regions for the firmware memory.
>
> The current carveout addresses and sizes are defined statically for
> each rproc device. The M4F processor do not have an MMU, and as such
> require the exact memory used by the firmware to be set-aside.
>
> Signed-off-by: Hari Nagalla <hnagalla@xxxxxx>
> ---
> Changes in v5:
> - Add M4F device node patches to the patch list
This will need to be reviewed after driver changes are complete and
should go through the SoC tree.
>
> arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi | 12 ++++++++++++
> arch/arm64/boot/dts/ti/k3-am642-evm.dts | 18 ++++++++++++++++++
> arch/arm64/boot/dts/ti/k3-am642-sk.dts | 18 ++++++++++++++++++
> 3 files changed, 48 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
> index 686d49790721..4151d0057bc8 100644
> --- a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
> @@ -158,4 +158,16 @@ mcu_esm: esm@4100000 {
> reg = <0x00 0x4100000 0x00 0x1000>;
> ti,esm-pins = <0>, <1>;
> };
> +
> + mcu_m4fss: m4fss@5000000 {
> + compatible = "ti,am64-m4fss";
> + reg = <0x00 0x5000000 0x00 0x30000>,
> + <0x00 0x5040000 0x00 0x10000>;
> + reg-names = "iram", "dram";
> + ti,sci = <&dmsc>;
> + ti,sci-dev-id = <9>;
> + ti,sci-proc-ids = <0x18 0xff>;
> + resets = <&k3_reset 9 1>;
> + firmware-name = "am64-mcu-m4f0_0-fw";
> + };
> };
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> index d84e7ee16032..4fd1dc162534 100644
> --- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> @@ -99,6 +99,18 @@ main_r5fss1_core1_memory_region: r5f-memory@a3100000 {
> no-map;
> };
>
> + mcu_m4fss_dma_memory_region: m4f-dma-memory@a4000000 {
> + compatible = "shared-dma-pool";
> + reg = <0x00 0xa4000000 0x00 0x100000>;
> + no-map;
> + };
> +
> + mcu_m4fss_memory_region: m4f-memory@a4100000 {
> + compatible = "shared-dma-pool";
> + reg = <0x00 0xa4100000 0x00 0xf00000>;
> + no-map;
> + };
> +
> rtos_ipc_memory_region: ipc-memories@a5000000 {
> reg = <0x00 0xa5000000 0x00 0x00800000>;
> alignment = <0x1000>;
> @@ -639,6 +651,12 @@ &main_r5fss1_core1 {
> <&main_r5fss1_core1_memory_region>;
> };
>
> +&mcu_m4fss {
> + mboxes = <&mailbox0_cluster6>, <&mbox_m4_0>;
> + memory-region = <&mcu_m4fss_dma_memory_region>,
> + <&mcu_m4fss_memory_region>;
> +};
> +
> &serdes_ln_ctrl {
> idle-states = <AM64_SERDES0_LANE0_PCIE0>;
> };
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> index 963d796a3a97..f919dd5ba9ba 100644
> --- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> @@ -98,6 +98,18 @@ main_r5fss1_core1_memory_region: r5f-memory@a3100000 {
> no-map;
> };
>
> + mcu_m4fss_dma_memory_region: m4f-dma-memory@a4000000 {
> + compatible = "shared-dma-pool";
> + reg = <0x00 0xa4000000 0x00 0x100000>;
> + no-map;
> + };
> +
> + mcu_m4fss_memory_region: m4f-memory@a4100000 {
> + compatible = "shared-dma-pool";
> + reg = <0x00 0xa4100000 0x00 0xf00000>;
> + no-map;
> + };
> +
> rtos_ipc_memory_region: ipc-memories@a5000000 {
> reg = <0x00 0xa5000000 0x00 0x00800000>;
> alignment = <0x1000>;
> @@ -637,6 +649,12 @@ &main_r5fss1_core1 {
> <&main_r5fss1_core1_memory_region>;
> };
>
> +&mcu_m4fss {
> + mboxes = <&mailbox0_cluster6>, <&mbox_m4_0>;
> + memory-region = <&mcu_m4fss_dma_memory_region>,
> + <&mcu_m4fss_memory_region>;
> +};
> +
> &ecap0 {
> status = "okay";
> /* PWM is available on Pin 1 of header J3 */
> --
> 2.34.1
>
--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
