Memory Controller drivers

configname: CONFIG_MEMORY

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Controller drivers
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This option allows to enable specific memory controller drivers,
useful mostly on embedded systems. These could be controllers
for DRAM (SDR, DDR), ROM, SRAM and others. The drivers features
vary from memory tuning and frequency scaling to enabling
access to attached peripherals through memory bus.

is selected by
CONFIG_TEGRA_MC