Hello everyone,
I would like to ask what would be a good starting point to have a custom multi-stage booting for the NXP i.mx6UL processor?
Basically I need to be able to configure an FPGA before the U-Boot is executed. The reason for that is that the PGA must be configured so that the im6UL can have a physical connection to the DRAM. To clarify:
- In the circuit, the DRAM will be multiplexed by an FPGA. If the FPGA is not configured, the imx6UL has no access to the DRAM.
- The imx6UL has a direct SPI connection to the flash and to the FPGA, so all I need is to take the bitstream from a given location in the FLASH and load it into the FPGA, then just wait for a flag (GPIO?) saying that the FPGA was successfully configured and keep the booting process in the processor as normal.
As I haven't done yet anything similar, just wanted to know if you have any recommendations regarding where to start and some hints to proceed.
Thanks in advance!
Bests,
Jose Moises
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