u-boot

History

Shiji Yang 506df9dc58 treewide: rework linker symbol declarations in sections header 1. Convert all linker symbols to char[] type so that we can get the corresponding address by calling array name 'var' or its address '&var'. In this way, we can avoid some potential issues[1]. 2. Remove unused symbol '_TEXT_BASE'. It has been abandoned and has not been referenced by any source code. 3. Move '__data_end' to the arch x86's own sections header as it's only used by x86 arch. 4. Remove some duplicate declared linker symbols. Now we use the standard header file to declare them. [1] This patch fixes the boot failure on MIPS target. Error log: SPL: Image overlaps SPL Fixes: `1b8a1be1a1` ("spl: spl_legacy: Fix spl_end address") Signed-off-by: Shiji Yang <yangshiji66@outlook.com> Reviewed-by: Tom Rini <trini@konsulko.com>		2023-08-09 09:21:42 -04:00
..
Kconfig	imx: Finish migration of IMX_CONFIG to Kconfig	2021-08-31 17:46:37 -04:00
lpddr4_timing_1gb.c	WS cleanup: remove trailing empty lines	2021-09-30 08:08:56 -04:00
lpddr4_timing_2gb.c	WS cleanup: remove trailing empty lines	2021-09-30 08:08:56 -04:00
lpddr4_timing_3gb.c	WS cleanup: remove trailing empty lines	2021-09-30 08:08:56 -04:00
lpddr4_timing_4gb.c	WS cleanup: remove trailing empty lines	2021-09-30 08:08:56 -04:00
lpddr4_timing.h
MAINTAINERS
Makefile
pico-imx8mq.c	imx: bootaux: change names of MACROs used to boot MCU on iMX devices	2023-07-13 11:29:40 +02:00
README
spl.c	treewide: rework linker symbol declarations in sections header	2023-08-09 09:21:42 -04:00

README

U-Boot for the Technexion Pico i.MX8MQ

Quick Start
===========
- Build the TFA binary
- Get DDR and HDMI firmware
- Build U-Boot
- Boot

Get and Build the TFA blob
==========================
Note: srctree is U-Boot source directory
Get ATF from: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git
branch: master
$ CROSS_COMPILE=aarch64-linux-gnu- make PLAT=imx8mq bl31
$ cp build/imx8mq/release/bl31.bin $(builddir)

Get the DDR and HDMI firmware
=============================
$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-7.9.bin
$ chmod +x firmware-imx-7.9.bin
$ ./firmware-imx-7.9.bin
# Or use this to avoid running random scripts from the internet,
# but note that you must agree to the license the script displays:
# $ dd if=firmware-imx-7.9.bin of=firmware-imx-7.9.tar.bz2 bs=38868 skip=1
# $ tar -xf firmware-imx-7.9.tar.bz2
$ cp firmware-imx-7.9/firmware/hdmi/cadence/signed_hdmi_imx8m.bin $(builddir)
$ cp firmware-imx-7.9/firmware/ddr/synopsys/lpddr4*.bin $(builddir)

Build U-Boot
============
$ export CROSS_COMPILE=aarch64-poky-linux-
$ make pico-imx8mq_defconfig
$ make flash.bin

Burn the flash.bin to MicroSD card offset 33KB
$ dd if=flash.bin of=/dev/mmcblkX bs=1024 seek=33
Or into eMMC from a running system
$ dhcp flash.bin && mmc write $loadaddr 0x42 0x800

Boot
====
"o" denotes a pin
"[]" denotes two pins bridged by a jumper

eMMC boot:
J1 o[] []o J2
   []o o[]

USB upload via USB-C connector:
J1 ooo ooo J2
   o[] []o