This how-to topic is applicable only to LSDK 18.09 and older releases. For LSDK 18.12 and newer releases, refer Deploying TF-A binaries in Layerscape Software Development Kit <version> Documentation.
Follow these steps to update the PBL/RCW binary on the SD card.
Compiling PBL binary from RCW source file (optional)
If the user already has a PBL binary, this step can be skipped.
Clone the rcw repository and compile the PBL binary.
- $ git clone https://source.codeaurora.org/external/qoriq/qoriq-components/rcw
- $ cd rcw
- $ git checkout -b <new branch name> <LSDK tag>. For example, $ git checkout -b LSDK-18.09 LSDK-18.09
- $ cd ls1046ardb
- If required, make changes to the rcw files.
- $ make
The default PBL binary for LS1046ARDB is RR_FFSSPPPH_1133_5559/rcw_1800_qspiboot.bin.swapped.
By default, the QSPI controller on LS1046A reads/writes in 64-bit big endian (BE) mode. This makes it necessary to use a byte swapped PBL binary image, for example, rcw_1800_qspiboot.bin.swapped. The last PBI command in rcw_1800_qspiboot.bin.swapped is a write to the QPSI_MCR register that changes the endianness of QSPI controller to 64-bit little endian (LE). With this change, subsequent accesses are made in little endian format.
See the rcw/ls1046ardb/README file for an explanation of the naming convention for the directories that contain the RCW source and binary files.
SD card start block number for PBL/RCW binary
| Image | SD card start block number |
|---|
| PBL/RCW binary | 0x00008 = 8 |
Refer the Flash layout for boot flow with PPA – LSDK 18.09 and older releases for a complete listing of the SD card start block numbers for all LSDK firmware images.
Programming PBL/RCW binary to SD card
- Plug the SD card into the Linux host.
- Run the following command on the Linux host:
- $ sudo dd if=rcw_1800_qspiboot.bin.swapped of=/dev/sdX bs=512 seek=8 conv=fsync
Use the command cat /proc/partitions to see a list of devices and their sizes to make sure that the correct device names have been chosen.
The SDHC storage drive in the Linux PC is detected as /dev/sdX, where X is a letter such as a, b, c. Make sure to choose the correct device name, because data on this device will be replaced.
If your Linux host machine supports read/write SDHC card directly without an extra SDHC card reader device, the device name of SDHC card is typically mmcblk0.
- Remove the SD card from the Linux host machine.
- Plug the SD card into LS1046ARDB and boot the board to Ubuntu using the SD card. You can boot the board using the SD card either by:
- setting the switches: SW3[1:8] = 01001110 and SW5 [1:8] = 00100000, or
- boot switching to SD card => cpld reset sd
In boot log, you’ll see:
Board: LS1046ARDB, boot from SD
If U-Boot does not find LSDK on the SD card, it will boot TinyDistro from lsdk_linux_arm64_ tiny.itb stored on the SD card.
