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https://github.com/AsahiLinux/u-boot
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116 lines
3.6 KiB
ReStructuredText
116 lines
3.6 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0
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.. (C) Copyright 2020 Xilinx, Inc.
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ZYNQMP
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======
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About this
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----------
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This document describes the information about Xilinx Zynq UltraScale+ MPSOC
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U-Boot support. Core support is available in arch/arm/mach-zynqmp folder.
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ZynqMP boards
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-------------
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* zcu100 (ultra96 v1), zcu102, zcu104, zcu106 - Evaluation boards
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* zc1232 - Characterization boards
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* zcu111, zcu208, zcu216 - RFSOC evaluation boards
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* zcu1254, zcu1275, zcu1285 - RFSOC characterization boards
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* a2197 - System Controller on Versal boards
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* mini - Mini U-Boot running out of OCM
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* zc1751 - Characterization Processor boards
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- zc1751-xm015-dc1
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- zc1751-xm016-dc2
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- zc1751-xm017-dc3
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- zc1751-xm018-dc4
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- zc1751-xm019-dc5
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Building
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--------
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Configure and build for zcu102 board::
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$ source arm64 toolchain
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$ export DEVICE_TREE=zynqmp-zcu102-revA
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$ make xilinx_zynqmp_virt_defconfig
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$ make
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U-Boot SPL flow
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---------------
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For getting U-Boot SPL flow up and running it is necessary to do some additional
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steps because booting device requires external images which are not the part of
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U-Boot repository.
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PMU firmware
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^^^^^^^^^^^^
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The Platform Management Unit (PMU) RAM can be loaded with a firmware (PMU
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Firmware) at run-time and can be used to extend or customize the functionality
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of PMU. The PMU firmware is the part of boot image (boot.bin) and it is
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automatically loaded by BootROM. boot.bin can be directly generated by mkimage
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tool as the part of make. If you want to create boot.bin with PMU Firmware
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include please point CONFIG_PMUFW_INIT_FILE to PMU firmware binary. For example:::
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CONFIG_PMUFW_INIT_FILE="<path>/pmu.bin"
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If you see below message you need to load PMU Firmware::
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PMUFW is not found - Please load it!
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The second external blob is PMU Configuration object which is object which is
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passed from U-Boot SPL to PMU Firmware for initial system configuration. PMU
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configuration object is the part of U-Boot SPL image. For pointing to this
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object please use CONFIG_ZYNQMP_SPL_PM_CFG_OBJ_FILE symbol. For example:::
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CONFIG_ZYNQMP_SPL_PM_CFG_OBJ_FILE="<path>/pmu_obj.bin"
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PMU configuration object
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^^^^^^^^^^^^^^^^^^^^^^^^
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Object can be obtain in several ways. The easiest way is to take pm_cfg_obj.c
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from SDK/Vitis design and build it:::
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$ git clone https://github.com/Xilinx/embeddedsw.git
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$ export EMBEDDED_SW=$PWD/embeddedsw
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$ gcc -c pm_cfg_obj.c -I ${EMBEDDED_SW}/lib/bsp/standalone/src/common/ -I ${EMBEDDED_SW}/lib/sw_services/xilpm/src/zynqmp/client/common/
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$ objcopy -O binary pm_cfg_obj.o pmu_obj.bin
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The second way is to use tools/zynqmp_pm_cfg_obj_convert.py. For more
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information about this tool please run it with -h parameter.
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The third way is to extract it from Xilinx FSBL elf file. Object is starting at
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XPm_ConfigObject symbol.
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Arm Trusted Firmware (ATF)
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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U-Boot itself can run from EL3 to EL1. Without ATF U-Boot runs in EL3. Boot flow
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is U-Boot SPL->U-Boot in EL3. When ATF is used U-Boot normally runs in EL2. Boot
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flow is U-Boot SPL->ATF->U-Boot in EL2. As the part of build process u-boot.itb
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is generated. When BL31 shell variable is present u-boot.itb is generated with
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ATF included. You can point to it by:::
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$ export BL31=<path>/bl31.bin
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Flashing
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--------
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SD Card
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^^^^^^^
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To write an image that boots from a SD card first create a FAT32 partition
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and a FAT32 filesystem on the SD card::
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sudo fdisk /dev/sdx
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sudo mkfs.vfat -F 32 /dev/sdx1
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Mount the SD card and copy the SPL and U-Boot to the root directory of the
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SD card::
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sudo mount -t vfat /dev/sdx1 /mnt
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sudo cp spl/boot.bin /mnt
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sudo cp u-boot.itb /mnt
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