I want to test ddr4 chip by i.mx8m mini, because it has a ddr4 controller.
Here is my plan:
1. Run a cortex-m4 program on TCM to access ddr4 controller ( I cannot use linux because ddr4 dram is not available, I need ddr4 interface for testing the ddr4 chip).
2. Do not use cortex-a53 core.
And my question is: how can I boot the cortex-m4 directly (do not start cortex-a53)?