1*c67057feSJacky BaiNXP i.MX 8ULP 2*c67057feSJacky Bai================== 3*c67057feSJacky Bai 4*c67057feSJacky Baii.MX 8ULP is part of the ULP family with emphasis on extreme low-power techniques 5*c67057feSJacky Baiusing the 28 nm fully depleted silicon on insulator process. Like i.MX 7ULP, 6*c67057feSJacky Baii.MX 8ULP continues to be based on asymmetric architecture. 7*c67057feSJacky Bai 8*c67057feSJacky BaiThe i.MX 8ULP family of processors features NXP’s advanced implementation of the 9*c67057feSJacky Baidual Arm Cortex-A35 cores alongside an Arm Cortex-M33. This combined architecture 10*c67057feSJacky Baienables the device to run a rich operating system (such as Linux) on the Cortex-A35 11*c67057feSJacky Baicore and an RTOS (such as FreeRTOS) on the Cortex-M33 core. It also includes a Cadence 12*c67057feSJacky BaiTensilica Fusion DSP for low-power audio and a HiFi4 DSP for advanced audio and machine 13*c67057feSJacky Bailearning applications. 14*c67057feSJacky Bai 15*c67057feSJacky BaiThe design enables clean separation between two processing domains, where each has 16*c67057feSJacky Baiseparate power, clocking and peripheral islands, but the bus fabric of each domain 17*c67057feSJacky Baiis tightly integrated for efficient communication. The part is streamlined to minimize 18*c67057feSJacky Baipin count, enabling small packages and simple system integration. This microprocessor 19*c67057feSJacky Baiis intended for applications where efficiency and simple system integration is important. 20*c67057feSJacky Bai`i.MX8ULP Applications Processors`_. 21*c67057feSJacky Bai 22*c67057feSJacky BaiBoot Sequence 23*c67057feSJacky Bai------------- 24*c67057feSJacky Bai 25*c67057feSJacky BaiBootROM --> SPL --> BL31 --> BL33(u-boot) --> Linux kernel 26*c67057feSJacky Bai 27*c67057feSJacky BaiHow to build 28*c67057feSJacky Bai------------ 29*c67057feSJacky Bai 30*c67057feSJacky BaiBuild Procedure 31*c67057feSJacky Bai~~~~~~~~~~~~~~~ 32*c67057feSJacky Bai 33*c67057feSJacky Bai- Prepare AARCH64 toolchain. 34*c67057feSJacky Bai 35*c67057feSJacky Bai- Get the ELE FW image from NXP linux SDK package 36*c67057feSJacky Bai 37*c67057feSJacky Bai- Build SPL and u-boot firstly, and get binary images: u-boot-spl.bin, 38*c67057feSJacky Bai u-boot.bin and dtb 39*c67057feSJacky Bai 40*c67057feSJacky Bai- Build TF-A 41*c67057feSJacky Bai 42*c67057feSJacky Bai Build bl31: 43*c67057feSJacky Bai 44*c67057feSJacky Bai .. code:: shell 45*c67057feSJacky Bai 46*c67057feSJacky Bai CROSS_COMPILE=aarch64-linux-gnu- make PLAT=<Target_SoC> bl31 47*c67057feSJacky Bai 48*c67057feSJacky Bai Target_SoC should be "imx8ulp" for i.MX8ULP SoC. 49*c67057feSJacky Bai 50*c67057feSJacky BaiDeploy TF-A Images 51*c67057feSJacky Bai~~~~~~~~~~~~~~~~~~ 52*c67057feSJacky Bai 53*c67057feSJacky BaiTF-A binary(bl31.bin), u-boot-spl.bin u-boot.bin, ELE FW image are combined 54*c67057feSJacky Baitogether to generate a binary file called flash.bin, the imx-mkimage tool is 55*c67057feSJacky Baiused to generate flash.bin, and flash.bin needs to be flashed into SD card 56*c67057feSJacky Baiwith certain offset for BOOT ROM. 57*c67057feSJacky Bai 58*c67057feSJacky BaiReference Documentation 59*c67057feSJacky Bai~~~~~~~~~~~~~~~~~~~~~~~ 60*c67057feSJacky Bai 61*c67057feSJacky BaiDetails on how to prepare, generate & deploy the boot image be found in following documents: 62*c67057feSJacky Bai 63*c67057feSJacky Bai- i.MX Linux User's Guide 64*c67057feSJacky Bai `link <https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX>`__ 65*c67057feSJacky Bai- i.MX Linux Reference Manual 66*c67057feSJacky Bai `link <https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX>`__ 67*c67057feSJacky Bai 68*c67057feSJacky Bai.. _i.MX8ULP Applications Processors: https://www.nxp.com/products/processors-and-microcontrollers/arm-processors/i-mx-applications-processors/i-mx-8-applications-processors/i-mx-8ulp-applications-processor-family:i.MX8ULP 69*c67057feSJacky Bai 70