mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-27 04:18:51 +09:00
127 lines
3.6 KiB
ReStructuredText
127 lines
3.6 KiB
ReStructuredText
![]() |
.. SPDX-License-Identifier: GPL-2.0+
|
||
|
|
||
|
Colibri iMX7
|
||
|
============
|
||
|
|
||
|
Quick Start
|
||
|
-----------
|
||
|
|
||
|
- Build U-Boot
|
||
|
- NAND IMX image adjustments before flashing
|
||
|
- Flashing manually U-Boot to eMMC
|
||
|
- Flashing manually U-Boot to NAND
|
||
|
- Using ``update_uboot`` script
|
||
|
|
||
|
Build U-Boot
|
||
|
------------
|
||
|
|
||
|
.. code-block:: bash
|
||
|
|
||
|
$ export CROSS_COMPILE=arm-linux-gnueabi-
|
||
|
$ make colibri_imx7_emmc_defconfig # For NAND: colibri_imx7_defconfig
|
||
|
$ make
|
||
|
|
||
|
After build succeeds, you will obtain final ``u-boot-dtb.imx`` IMX specific
|
||
|
image, ready for flashing (but check next section for additional
|
||
|
adjustments).
|
||
|
|
||
|
Final IMX program image includes (section ``6.6.7`` from `IMX7DRM
|
||
|
<https://www.nxp.com/webapp/Download?colCode=IMX7DRM>`_):
|
||
|
|
||
|
* **Image vector table** (IVT) for BootROM
|
||
|
* **Boot data** -indicates the program image location, program image size
|
||
|
in bytes, and the plugin flag.
|
||
|
* **Device configuration data**
|
||
|
* **User image**: U-Boot image (``u-boot-dtb.bin``)
|
||
|
|
||
|
|
||
|
IMX image adjustments prior to flashing
|
||
|
---------------------------------------
|
||
|
|
||
|
1. U-Boot for both Colibri iMX7 NAND and eMMC versions
|
||
|
is built with HABv4 support (`AN4581.pdf
|
||
|
<https://www.nxp.com/docs/en/application-note/AN4581.pdf>`_)
|
||
|
enabled by default, which requires to generate a proper
|
||
|
Command Sequence File (CSF) by srktool from NXP (not included in the
|
||
|
U-Boot tree, check additional details in introduction_habv4.txt)
|
||
|
and concatenate it to the final ``u-boot-dtb.imx``.
|
||
|
|
||
|
2. In case if you don't want to generate a proper ``CSF`` (for any reason),
|
||
|
you still need to pad the IMX image so i has the same size as specified in
|
||
|
in **Boot Data** section of IMX image.
|
||
|
To obtain this value, run:
|
||
|
|
||
|
.. code-block:: bash
|
||
|
|
||
|
$ od -X -N 0x30 u-boot-dtb.imx
|
||
|
0000000 402000d1 87800000 00000000 877ff42c
|
||
|
0000020 877ff420 877ff400 878a5000 00000000
|
||
|
^^^^^^^^
|
||
|
0000040 877ff000 000a8060 00000000 40b401d2
|
||
|
^^^^^^^^ ^^^^^^^^
|
||
|
|
||
|
Where:
|
||
|
|
||
|
* ``877ff400`` - IVT self address
|
||
|
* ``877ff000`` - Program image address
|
||
|
* ``000a8060`` - Program image size
|
||
|
|
||
|
To calculate the padding:
|
||
|
|
||
|
* IVT offset = ``0x877ff400`` - ``0x877ff000`` = ``0x400``
|
||
|
* Program image size = ``0xa8060`` - ``0x400`` = ``0xa7c60``
|
||
|
|
||
|
and then pad the image:
|
||
|
|
||
|
.. code-block:: bash
|
||
|
|
||
|
$ objcopy -I binary -O binary --pad-to 0xa7c60 --gap-fill=0x00 \
|
||
|
u-boot-dtb.imx u-boot-dtb.imx.zero-padded
|
||
|
|
||
|
3. Also, according to requirement from ``6.6.7.1``, the final image
|
||
|
should have ``0x400`` offset for initial IVT table.
|
||
|
|
||
|
For eMMC setup we handle this by flashing it to ``0x400``, howewer
|
||
|
for NAND setup we adjust the image prior to flashing, adding padding in the
|
||
|
beginning of the image.
|
||
|
|
||
|
.. code-block:: bash
|
||
|
|
||
|
$ dd if=u-boot-dtb.imx.zero-padded of=u-boot-dtb.imx.ready bs=1024 seek=1
|
||
|
|
||
|
Flash U-Boot IMX image to eMMC
|
||
|
------------------------------
|
||
|
|
||
|
Flash the ``u-boot-dtb.imx.zero-padded`` binary to the primary eMMC hardware
|
||
|
boot area partition:
|
||
|
|
||
|
.. code-block:: bash
|
||
|
|
||
|
|
||
|
=> load mmc 1:1 $loadaddr u-boot-dtb.imx.zero-padded
|
||
|
=> setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt ${blkcnt} / 0x200
|
||
|
=> mmc dev 0 1
|
||
|
=> mmc write ${loadaddr} 0x2 ${blkcnt}
|
||
|
|
||
|
Flash U-Boot IMX image to NAND
|
||
|
------------------------------
|
||
|
|
||
|
.. code-block:: bash
|
||
|
|
||
|
=> load mmc 1:1 $loadaddr u-boot-dtb.imx.ready
|
||
|
=> nand erase.part u-boot1
|
||
|
=> nand write ${loadaddr} u-boot1 ${filesize}
|
||
|
=> nand erase.part u-boot2
|
||
|
=> nand write ${loadaddr} u-boot2 ${filesize}
|
||
|
|
||
|
Using update_uboot script
|
||
|
-------------------------
|
||
|
|
||
|
You can also usb U-Boot env update_uboot script,
|
||
|
which wraps all eMMC/NAND specific command invocation:
|
||
|
|
||
|
.. code-block:: bash
|
||
|
|
||
|
=> load mmc 1:1 $loadaddr u-boot-dtb.imx.ready
|
||
|
=> run update_uboot
|