1.4. Device Comparison and Porting

The below table summarizes the various AM62x variants and highlights the differences in their features:

REFERENCE NAME	Arm Cortex-A53	3D Graphics Engine
AM6254	Quad Core	Yes
AM6252	Dual Core	Yes
AM6251	Single Core	Yes
AM6234	Quad Core	No
AM6232	Dual Core	No
AM6231	Single Core	No

For more information, please refer to the following link.

If you would like to emulate one of the above variants, the below suggestions will configure the Linux on the AM62x SK EVM to use less resources than what are available on the super-set device. For example, the AM62x SK EVM has an AM6254 device and to model AM6232, we can disable the two A53 cores and turn off the GPU on the EVM.

1. In order to modify the number of A53 CPU cores, choose one of the below methods:

   • Change the cores in Device Tree Source (DTS) file, reference section: Porting CPU

   • Kernel parameter, reference section: Changing # of CPU Cores

2. To disable the GPU, refer to the section: Porting GPU

3. Miscellaneous: If you would like to modify the RAM size, choose one of the below methods:

   • Change the Uboot source code, reference section: Modifying RAM Size

   • Kernel parameter, reference section: Changing RAM Size