| Description |
| =========== |
| |
| The i.MX 8 series of applications processors is a feature- and |
| performance-scalable multi-core platform that includes single-, |
| dual-, and quad-core families based on the Arm® Cortex® |
| architecture—including combined Cortex-A72 + Cortex-A53, |
| Cortex-A35, and Cortex-M4 based solutions for advanced graphics, |
| imaging, machine vision, audio, voice, video, and safety-critical |
| applications. |
| |
| The i.MX8QM is with 2 Cortex-A72 ARM core, 4 Cortex-A53 ARM core |
| and 1 Cortex-M4 system controller. |
| |
| The i.MX8QX is with 4 Cortex-A35 ARM core and 1 Cortex-M4 system |
| controller. |
| |
| The System Controller (SC) represents the evolution of centralized |
| control for system-level resources on i.MX8. The heart of the system |
| controller is a Cortex-M4 that executes system controller firmware. |
| |
| Boot Sequence |
| ============= |
| |
| Bootrom --> BL31 --> BL33(u-boot) --> Linux kernel |
| |
| How to build |
| ============ |
| |
| Build Procedure |
| --------------- |
| |
| - Prepare AARCH64 toolchain. |
| |
| - Build System Controller Firmware and u-boot firstly, and get binary images: scfw_tcm.bin and u-boot.bin |
| |
| - Build TF-A |
| |
| Build bl31: |
| |
| .. code:: shell |
| |
| CROSS_COMPILE=aarch64-linux-gnu- make PLAT=<Target_SoC> bl31 |
| |
| Target_SoC should be "imx8qm" for i.MX8QM SoC. |
| Target_SoC should be "imx8qx" for i.MX8QX SoC. |
| |
| Deploy TF-A Images |
| ----------------- |
| |
| TF-A binary(bl31.bin), scfw_tcm.bin and u-boot.bin are combined together |
| to generate a binary file called flash.bin, the imx-mkimage tool is used |
| to generate flash.bin, and flash.bin needs to be flashed into SD card |
| with certain offset for BOOT ROM. The system controller firmware, |
| u-boot and imx-mkimage will be upstreamed soon, this doc will be updated |
| once they are ready, and the link will be posted. |
| |
| .. _i.MX8: https://www.nxp.com/products/processors-and-microcontrollers/applications-processors/i.mx-applications-processors/i.mx-8-processors/i.mx-8-family-arm-cortex-a53-cortex-a72-virtualization-vision-3d-graphics-4k-video:i.MX8 |
